1 /* 2 * All test cases of nested virtualization should be in this file 3 * 4 * Author : Arthur Chunqi Li <yzt356@gmail.com> 5 */ 6 7 #include <asm/debugreg.h> 8 9 #include "vmx.h" 10 #include "msr.h" 11 #include "processor.h" 12 #include "vm.h" 13 #include "pci.h" 14 #include "fwcfg.h" 15 #include "isr.h" 16 #include "desc.h" 17 #include "apic.h" 18 #include "types.h" 19 #include "vmalloc.h" 20 #include "alloc_page.h" 21 #include "smp.h" 22 #include "delay.h" 23 24 #define NONCANONICAL 0xaaaaaaaaaaaaaaaaull 25 26 #define VPID_CAP_INVVPID_TYPES_SHIFT 40 27 28 u64 ia32_pat; 29 u64 ia32_efer; 30 void *io_bitmap_a, *io_bitmap_b; 31 u16 ioport; 32 33 unsigned long *pml4; 34 u64 eptp; 35 void *data_page1, *data_page2; 36 37 phys_addr_t pci_physaddr; 38 39 void *pml_log; 40 #define PML_INDEX 512 41 42 static inline unsigned ffs(unsigned x) 43 { 44 int pos = -1; 45 46 __asm__ __volatile__("bsf %1, %%eax; cmovnz %%eax, %0" 47 : "+r"(pos) : "rm"(x) : "eax"); 48 return pos + 1; 49 } 50 51 static inline void vmcall(void) 52 { 53 asm volatile("vmcall"); 54 } 55 56 static void basic_guest_main(void) 57 { 58 report(1, "Basic VMX test"); 59 } 60 61 static int basic_exit_handler(union exit_reason exit_reason) 62 { 63 report(0, "Basic VMX test"); 64 print_vmexit_info(exit_reason); 65 return VMX_TEST_EXIT; 66 } 67 68 static void vmenter_main(void) 69 { 70 u64 rax; 71 u64 rsp, resume_rsp; 72 73 report(1, "test vmlaunch"); 74 75 asm volatile( 76 "mov %%rsp, %0\n\t" 77 "mov %3, %%rax\n\t" 78 "vmcall\n\t" 79 "mov %%rax, %1\n\t" 80 "mov %%rsp, %2\n\t" 81 : "=r"(rsp), "=r"(rax), "=r"(resume_rsp) 82 : "g"(0xABCD)); 83 report((rax == 0xFFFF) && (rsp == resume_rsp), "test vmresume"); 84 } 85 86 static int vmenter_exit_handler(union exit_reason exit_reason) 87 { 88 u64 guest_rip = vmcs_read(GUEST_RIP); 89 90 switch (exit_reason.basic) { 91 case VMX_VMCALL: 92 if (regs.rax != 0xABCD) { 93 report(0, "test vmresume"); 94 return VMX_TEST_VMEXIT; 95 } 96 regs.rax = 0xFFFF; 97 vmcs_write(GUEST_RIP, guest_rip + 3); 98 return VMX_TEST_RESUME; 99 default: 100 report(0, "test vmresume"); 101 print_vmexit_info(exit_reason); 102 } 103 return VMX_TEST_VMEXIT; 104 } 105 106 u32 preempt_scale; 107 volatile unsigned long long tsc_val; 108 volatile u32 preempt_val; 109 u64 saved_rip; 110 111 static int preemption_timer_init(struct vmcs *vmcs) 112 { 113 if (!(ctrl_pin_rev.clr & PIN_PREEMPT)) { 114 printf("\tPreemption timer is not supported\n"); 115 return VMX_TEST_EXIT; 116 } 117 vmcs_write(PIN_CONTROLS, vmcs_read(PIN_CONTROLS) | PIN_PREEMPT); 118 preempt_val = 10000000; 119 vmcs_write(PREEMPT_TIMER_VALUE, preempt_val); 120 preempt_scale = rdmsr(MSR_IA32_VMX_MISC) & 0x1F; 121 122 if (!(ctrl_exit_rev.clr & EXI_SAVE_PREEMPT)) 123 printf("\tSave preemption value is not supported\n"); 124 125 return VMX_TEST_START; 126 } 127 128 static void preemption_timer_main(void) 129 { 130 tsc_val = rdtsc(); 131 if (ctrl_exit_rev.clr & EXI_SAVE_PREEMPT) { 132 vmx_set_test_stage(0); 133 vmcall(); 134 if (vmx_get_test_stage() == 1) 135 vmcall(); 136 } 137 vmx_set_test_stage(1); 138 while (vmx_get_test_stage() == 1) { 139 if (((rdtsc() - tsc_val) >> preempt_scale) 140 > 10 * preempt_val) { 141 vmx_set_test_stage(2); 142 vmcall(); 143 } 144 } 145 tsc_val = rdtsc(); 146 asm volatile ("hlt"); 147 vmcall(); 148 vmx_set_test_stage(5); 149 vmcall(); 150 } 151 152 static int preemption_timer_exit_handler(union exit_reason exit_reason) 153 { 154 bool guest_halted; 155 u64 guest_rip; 156 u32 insn_len; 157 u32 ctrl_exit; 158 159 guest_rip = vmcs_read(GUEST_RIP); 160 insn_len = vmcs_read(EXI_INST_LEN); 161 switch (exit_reason.basic) { 162 case VMX_PREEMPT: 163 switch (vmx_get_test_stage()) { 164 case 1: 165 case 2: 166 report(((rdtsc() - tsc_val) >> preempt_scale) >= preempt_val, 167 "busy-wait for preemption timer"); 168 vmx_set_test_stage(3); 169 vmcs_write(PREEMPT_TIMER_VALUE, preempt_val); 170 return VMX_TEST_RESUME; 171 case 3: 172 guest_halted = 173 (vmcs_read(GUEST_ACTV_STATE) == ACTV_HLT); 174 report(((rdtsc() - tsc_val) >> preempt_scale) >= preempt_val 175 && guest_halted, 176 "preemption timer during hlt"); 177 vmx_set_test_stage(4); 178 vmcs_write(PIN_CONTROLS, 179 vmcs_read(PIN_CONTROLS) & ~PIN_PREEMPT); 180 vmcs_write(EXI_CONTROLS, 181 vmcs_read(EXI_CONTROLS) & ~EXI_SAVE_PREEMPT); 182 vmcs_write(GUEST_ACTV_STATE, ACTV_ACTIVE); 183 return VMX_TEST_RESUME; 184 case 4: 185 report(saved_rip == guest_rip, 186 "preemption timer with 0 value"); 187 break; 188 default: 189 report(false, "Invalid stage."); 190 print_vmexit_info(exit_reason); 191 break; 192 } 193 break; 194 case VMX_VMCALL: 195 vmcs_write(GUEST_RIP, guest_rip + insn_len); 196 switch (vmx_get_test_stage()) { 197 case 0: 198 report(vmcs_read(PREEMPT_TIMER_VALUE) == preempt_val, 199 "Keep preemption value"); 200 vmx_set_test_stage(1); 201 vmcs_write(PREEMPT_TIMER_VALUE, preempt_val); 202 ctrl_exit = (vmcs_read(EXI_CONTROLS) | 203 EXI_SAVE_PREEMPT) & ctrl_exit_rev.clr; 204 vmcs_write(EXI_CONTROLS, ctrl_exit); 205 return VMX_TEST_RESUME; 206 case 1: 207 report(vmcs_read(PREEMPT_TIMER_VALUE) < preempt_val, 208 "Save preemption value"); 209 return VMX_TEST_RESUME; 210 case 2: 211 report(0, "busy-wait for preemption timer"); 212 vmx_set_test_stage(3); 213 vmcs_write(PREEMPT_TIMER_VALUE, preempt_val); 214 return VMX_TEST_RESUME; 215 case 3: 216 report(0, "preemption timer during hlt"); 217 vmx_set_test_stage(4); 218 /* fall through */ 219 case 4: 220 vmcs_write(PIN_CONTROLS, 221 vmcs_read(PIN_CONTROLS) | PIN_PREEMPT); 222 vmcs_write(PREEMPT_TIMER_VALUE, 0); 223 saved_rip = guest_rip + insn_len; 224 return VMX_TEST_RESUME; 225 case 5: 226 report(0, 227 "preemption timer with 0 value (vmcall stage 5)"); 228 break; 229 default: 230 // Should not reach here 231 report(false, "unexpected stage, %d", 232 vmx_get_test_stage()); 233 print_vmexit_info(exit_reason); 234 return VMX_TEST_VMEXIT; 235 } 236 break; 237 default: 238 report(false, "Unknown exit reason, 0x%x", exit_reason.full); 239 print_vmexit_info(exit_reason); 240 } 241 vmcs_write(PIN_CONTROLS, vmcs_read(PIN_CONTROLS) & ~PIN_PREEMPT); 242 return VMX_TEST_VMEXIT; 243 } 244 245 static void msr_bmp_init(void) 246 { 247 void *msr_bitmap; 248 u32 ctrl_cpu0; 249 250 msr_bitmap = alloc_page(); 251 ctrl_cpu0 = vmcs_read(CPU_EXEC_CTRL0); 252 ctrl_cpu0 |= CPU_MSR_BITMAP; 253 vmcs_write(CPU_EXEC_CTRL0, ctrl_cpu0); 254 vmcs_write(MSR_BITMAP, (u64)msr_bitmap); 255 } 256 257 static void *get_msr_bitmap(void) 258 { 259 void *msr_bitmap; 260 261 if (vmcs_read(CPU_EXEC_CTRL0) & CPU_MSR_BITMAP) { 262 msr_bitmap = (void *)vmcs_read(MSR_BITMAP); 263 } else { 264 msr_bitmap = alloc_page(); 265 memset(msr_bitmap, 0xff, PAGE_SIZE); 266 vmcs_write(MSR_BITMAP, (u64)msr_bitmap); 267 vmcs_set_bits(CPU_EXEC_CTRL0, CPU_MSR_BITMAP); 268 } 269 270 return msr_bitmap; 271 } 272 273 static void disable_intercept_for_x2apic_msrs(void) 274 { 275 unsigned long *msr_bitmap = (unsigned long *)get_msr_bitmap(); 276 u32 msr; 277 278 for (msr = APIC_BASE_MSR; 279 msr < (APIC_BASE_MSR+0xff); 280 msr += BITS_PER_LONG) { 281 unsigned int word = msr / BITS_PER_LONG; 282 283 msr_bitmap[word] = 0; 284 msr_bitmap[word + (0x800 / sizeof(long))] = 0; 285 } 286 } 287 288 static int test_ctrl_pat_init(struct vmcs *vmcs) 289 { 290 u64 ctrl_ent; 291 u64 ctrl_exi; 292 293 msr_bmp_init(); 294 if (!(ctrl_exit_rev.clr & EXI_SAVE_PAT) && 295 !(ctrl_exit_rev.clr & EXI_LOAD_PAT) && 296 !(ctrl_enter_rev.clr & ENT_LOAD_PAT)) { 297 printf("\tSave/load PAT is not supported\n"); 298 return 1; 299 } 300 301 ctrl_ent = vmcs_read(ENT_CONTROLS); 302 ctrl_exi = vmcs_read(EXI_CONTROLS); 303 ctrl_ent |= ctrl_enter_rev.clr & ENT_LOAD_PAT; 304 ctrl_exi |= ctrl_exit_rev.clr & (EXI_SAVE_PAT | EXI_LOAD_PAT); 305 vmcs_write(ENT_CONTROLS, ctrl_ent); 306 vmcs_write(EXI_CONTROLS, ctrl_exi); 307 ia32_pat = rdmsr(MSR_IA32_CR_PAT); 308 vmcs_write(GUEST_PAT, 0x0); 309 vmcs_write(HOST_PAT, ia32_pat); 310 return VMX_TEST_START; 311 } 312 313 static void test_ctrl_pat_main(void) 314 { 315 u64 guest_ia32_pat; 316 317 guest_ia32_pat = rdmsr(MSR_IA32_CR_PAT); 318 if (!(ctrl_enter_rev.clr & ENT_LOAD_PAT)) 319 printf("\tENT_LOAD_PAT is not supported.\n"); 320 else { 321 if (guest_ia32_pat != 0) { 322 report(0, "Entry load PAT"); 323 return; 324 } 325 } 326 wrmsr(MSR_IA32_CR_PAT, 0x6); 327 vmcall(); 328 guest_ia32_pat = rdmsr(MSR_IA32_CR_PAT); 329 if (ctrl_enter_rev.clr & ENT_LOAD_PAT) 330 report(guest_ia32_pat == ia32_pat, "Entry load PAT"); 331 } 332 333 static int test_ctrl_pat_exit_handler(union exit_reason exit_reason) 334 { 335 u64 guest_rip; 336 u64 guest_pat; 337 338 guest_rip = vmcs_read(GUEST_RIP); 339 switch (exit_reason.basic) { 340 case VMX_VMCALL: 341 guest_pat = vmcs_read(GUEST_PAT); 342 if (!(ctrl_exit_rev.clr & EXI_SAVE_PAT)) { 343 printf("\tEXI_SAVE_PAT is not supported\n"); 344 vmcs_write(GUEST_PAT, 0x6); 345 } else { 346 report(guest_pat == 0x6, "Exit save PAT"); 347 } 348 if (!(ctrl_exit_rev.clr & EXI_LOAD_PAT)) 349 printf("\tEXI_LOAD_PAT is not supported\n"); 350 else 351 report(rdmsr(MSR_IA32_CR_PAT) == ia32_pat, 352 "Exit load PAT"); 353 vmcs_write(GUEST_PAT, ia32_pat); 354 vmcs_write(GUEST_RIP, guest_rip + 3); 355 return VMX_TEST_RESUME; 356 default: 357 printf("ERROR : Unknown exit reason, 0x%x.\n", exit_reason.full); 358 break; 359 } 360 return VMX_TEST_VMEXIT; 361 } 362 363 static int test_ctrl_efer_init(struct vmcs *vmcs) 364 { 365 u64 ctrl_ent; 366 u64 ctrl_exi; 367 368 msr_bmp_init(); 369 ctrl_ent = vmcs_read(ENT_CONTROLS) | ENT_LOAD_EFER; 370 ctrl_exi = vmcs_read(EXI_CONTROLS) | EXI_SAVE_EFER | EXI_LOAD_EFER; 371 vmcs_write(ENT_CONTROLS, ctrl_ent & ctrl_enter_rev.clr); 372 vmcs_write(EXI_CONTROLS, ctrl_exi & ctrl_exit_rev.clr); 373 ia32_efer = rdmsr(MSR_EFER); 374 vmcs_write(GUEST_EFER, ia32_efer ^ EFER_NX); 375 vmcs_write(HOST_EFER, ia32_efer ^ EFER_NX); 376 return VMX_TEST_START; 377 } 378 379 static void test_ctrl_efer_main(void) 380 { 381 u64 guest_ia32_efer; 382 383 guest_ia32_efer = rdmsr(MSR_EFER); 384 if (!(ctrl_enter_rev.clr & ENT_LOAD_EFER)) 385 printf("\tENT_LOAD_EFER is not supported.\n"); 386 else { 387 if (guest_ia32_efer != (ia32_efer ^ EFER_NX)) { 388 report(0, "Entry load EFER"); 389 return; 390 } 391 } 392 wrmsr(MSR_EFER, ia32_efer); 393 vmcall(); 394 guest_ia32_efer = rdmsr(MSR_EFER); 395 if (ctrl_enter_rev.clr & ENT_LOAD_EFER) 396 report(guest_ia32_efer == ia32_efer, "Entry load EFER"); 397 } 398 399 static int test_ctrl_efer_exit_handler(union exit_reason exit_reason) 400 { 401 u64 guest_rip; 402 u64 guest_efer; 403 404 guest_rip = vmcs_read(GUEST_RIP); 405 switch (exit_reason.basic) { 406 case VMX_VMCALL: 407 guest_efer = vmcs_read(GUEST_EFER); 408 if (!(ctrl_exit_rev.clr & EXI_SAVE_EFER)) { 409 printf("\tEXI_SAVE_EFER is not supported\n"); 410 vmcs_write(GUEST_EFER, ia32_efer); 411 } else { 412 report(guest_efer == ia32_efer, "Exit save EFER"); 413 } 414 if (!(ctrl_exit_rev.clr & EXI_LOAD_EFER)) { 415 printf("\tEXI_LOAD_EFER is not supported\n"); 416 wrmsr(MSR_EFER, ia32_efer ^ EFER_NX); 417 } else { 418 report(rdmsr(MSR_EFER) == (ia32_efer ^ EFER_NX), 419 "Exit load EFER"); 420 } 421 vmcs_write(GUEST_PAT, ia32_efer); 422 vmcs_write(GUEST_RIP, guest_rip + 3); 423 return VMX_TEST_RESUME; 424 default: 425 printf("ERROR : Unknown exit reason, 0x%x.\n", exit_reason.full); 426 break; 427 } 428 return VMX_TEST_VMEXIT; 429 } 430 431 u32 guest_cr0, guest_cr4; 432 433 static void cr_shadowing_main(void) 434 { 435 u32 cr0, cr4, tmp; 436 437 // Test read through 438 vmx_set_test_stage(0); 439 guest_cr0 = read_cr0(); 440 if (vmx_get_test_stage() == 1) 441 report(0, "Read through CR0"); 442 else 443 vmcall(); 444 vmx_set_test_stage(1); 445 guest_cr4 = read_cr4(); 446 if (vmx_get_test_stage() == 2) 447 report(0, "Read through CR4"); 448 else 449 vmcall(); 450 // Test write through 451 guest_cr0 = guest_cr0 ^ (X86_CR0_TS | X86_CR0_MP); 452 guest_cr4 = guest_cr4 ^ (X86_CR4_TSD | X86_CR4_DE); 453 vmx_set_test_stage(2); 454 write_cr0(guest_cr0); 455 if (vmx_get_test_stage() == 3) 456 report(0, "Write throuth CR0"); 457 else 458 vmcall(); 459 vmx_set_test_stage(3); 460 write_cr4(guest_cr4); 461 if (vmx_get_test_stage() == 4) 462 report(0, "Write through CR4"); 463 else 464 vmcall(); 465 // Test read shadow 466 vmx_set_test_stage(4); 467 vmcall(); 468 cr0 = read_cr0(); 469 if (vmx_get_test_stage() != 5) 470 report(cr0 == guest_cr0, "Read shadowing CR0"); 471 vmx_set_test_stage(5); 472 cr4 = read_cr4(); 473 if (vmx_get_test_stage() != 6) 474 report(cr4 == guest_cr4, "Read shadowing CR4"); 475 // Test write shadow (same value with shadow) 476 vmx_set_test_stage(6); 477 write_cr0(guest_cr0); 478 if (vmx_get_test_stage() == 7) 479 report(0, "Write shadowing CR0 (same value with shadow)"); 480 else 481 vmcall(); 482 vmx_set_test_stage(7); 483 write_cr4(guest_cr4); 484 if (vmx_get_test_stage() == 8) 485 report(0, "Write shadowing CR4 (same value with shadow)"); 486 else 487 vmcall(); 488 // Test write shadow (different value) 489 vmx_set_test_stage(8); 490 tmp = guest_cr0 ^ X86_CR0_TS; 491 asm volatile("mov %0, %%rsi\n\t" 492 "mov %%rsi, %%cr0\n\t" 493 ::"m"(tmp) 494 :"rsi", "memory", "cc"); 495 report(vmx_get_test_stage() == 9, 496 "Write shadowing different X86_CR0_TS"); 497 vmx_set_test_stage(9); 498 tmp = guest_cr0 ^ X86_CR0_MP; 499 asm volatile("mov %0, %%rsi\n\t" 500 "mov %%rsi, %%cr0\n\t" 501 ::"m"(tmp) 502 :"rsi", "memory", "cc"); 503 report(vmx_get_test_stage() == 10, 504 "Write shadowing different X86_CR0_MP"); 505 vmx_set_test_stage(10); 506 tmp = guest_cr4 ^ X86_CR4_TSD; 507 asm volatile("mov %0, %%rsi\n\t" 508 "mov %%rsi, %%cr4\n\t" 509 ::"m"(tmp) 510 :"rsi", "memory", "cc"); 511 report(vmx_get_test_stage() == 11, 512 "Write shadowing different X86_CR4_TSD"); 513 vmx_set_test_stage(11); 514 tmp = guest_cr4 ^ X86_CR4_DE; 515 asm volatile("mov %0, %%rsi\n\t" 516 "mov %%rsi, %%cr4\n\t" 517 ::"m"(tmp) 518 :"rsi", "memory", "cc"); 519 report(vmx_get_test_stage() == 12, 520 "Write shadowing different X86_CR4_DE"); 521 } 522 523 static int cr_shadowing_exit_handler(union exit_reason exit_reason) 524 { 525 u64 guest_rip; 526 u32 insn_len; 527 u32 exit_qual; 528 529 guest_rip = vmcs_read(GUEST_RIP); 530 insn_len = vmcs_read(EXI_INST_LEN); 531 exit_qual = vmcs_read(EXI_QUALIFICATION); 532 switch (exit_reason.basic) { 533 case VMX_VMCALL: 534 switch (vmx_get_test_stage()) { 535 case 0: 536 report(guest_cr0 == vmcs_read(GUEST_CR0), 537 "Read through CR0"); 538 break; 539 case 1: 540 report(guest_cr4 == vmcs_read(GUEST_CR4), 541 "Read through CR4"); 542 break; 543 case 2: 544 report(guest_cr0 == vmcs_read(GUEST_CR0), 545 "Write through CR0"); 546 break; 547 case 3: 548 report(guest_cr4 == vmcs_read(GUEST_CR4), 549 "Write through CR4"); 550 break; 551 case 4: 552 guest_cr0 = vmcs_read(GUEST_CR0) ^ (X86_CR0_TS | X86_CR0_MP); 553 guest_cr4 = vmcs_read(GUEST_CR4) ^ (X86_CR4_TSD | X86_CR4_DE); 554 vmcs_write(CR0_MASK, X86_CR0_TS | X86_CR0_MP); 555 vmcs_write(CR0_READ_SHADOW, guest_cr0 & (X86_CR0_TS | X86_CR0_MP)); 556 vmcs_write(CR4_MASK, X86_CR4_TSD | X86_CR4_DE); 557 vmcs_write(CR4_READ_SHADOW, guest_cr4 & (X86_CR4_TSD | X86_CR4_DE)); 558 break; 559 case 6: 560 report(guest_cr0 == (vmcs_read(GUEST_CR0) ^ (X86_CR0_TS | X86_CR0_MP)), 561 "Write shadowing CR0 (same value)"); 562 break; 563 case 7: 564 report(guest_cr4 == (vmcs_read(GUEST_CR4) ^ (X86_CR4_TSD | X86_CR4_DE)), 565 "Write shadowing CR4 (same value)"); 566 break; 567 default: 568 // Should not reach here 569 report(false, "unexpected stage, %d", 570 vmx_get_test_stage()); 571 print_vmexit_info(exit_reason); 572 return VMX_TEST_VMEXIT; 573 } 574 vmcs_write(GUEST_RIP, guest_rip + insn_len); 575 return VMX_TEST_RESUME; 576 case VMX_CR: 577 switch (vmx_get_test_stage()) { 578 case 4: 579 report(0, "Read shadowing CR0"); 580 vmx_inc_test_stage(); 581 break; 582 case 5: 583 report(0, "Read shadowing CR4"); 584 vmx_inc_test_stage(); 585 break; 586 case 6: 587 report(0, "Write shadowing CR0 (same value)"); 588 vmx_inc_test_stage(); 589 break; 590 case 7: 591 report(0, "Write shadowing CR4 (same value)"); 592 vmx_inc_test_stage(); 593 break; 594 case 8: 595 case 9: 596 // 0x600 encodes "mov %esi, %cr0" 597 if (exit_qual == 0x600) 598 vmx_inc_test_stage(); 599 break; 600 case 10: 601 case 11: 602 // 0x604 encodes "mov %esi, %cr4" 603 if (exit_qual == 0x604) 604 vmx_inc_test_stage(); 605 break; 606 default: 607 // Should not reach here 608 report(false, "unexpected stage, %d", 609 vmx_get_test_stage()); 610 print_vmexit_info(exit_reason); 611 return VMX_TEST_VMEXIT; 612 } 613 vmcs_write(GUEST_RIP, guest_rip + insn_len); 614 return VMX_TEST_RESUME; 615 default: 616 report(false, "Unknown exit reason, 0x%x", exit_reason.full); 617 print_vmexit_info(exit_reason); 618 } 619 return VMX_TEST_VMEXIT; 620 } 621 622 static int iobmp_init(struct vmcs *vmcs) 623 { 624 u32 ctrl_cpu0; 625 626 io_bitmap_a = alloc_page(); 627 io_bitmap_b = alloc_page(); 628 ctrl_cpu0 = vmcs_read(CPU_EXEC_CTRL0); 629 ctrl_cpu0 |= CPU_IO_BITMAP; 630 ctrl_cpu0 &= (~CPU_IO); 631 vmcs_write(CPU_EXEC_CTRL0, ctrl_cpu0); 632 vmcs_write(IO_BITMAP_A, (u64)io_bitmap_a); 633 vmcs_write(IO_BITMAP_B, (u64)io_bitmap_b); 634 return VMX_TEST_START; 635 } 636 637 static void iobmp_main(void) 638 { 639 // stage 0, test IO pass 640 vmx_set_test_stage(0); 641 inb(0x5000); 642 outb(0x0, 0x5000); 643 report(vmx_get_test_stage() == 0, "I/O bitmap - I/O pass"); 644 // test IO width, in/out 645 ((u8 *)io_bitmap_a)[0] = 0xFF; 646 vmx_set_test_stage(2); 647 inb(0x0); 648 report(vmx_get_test_stage() == 3, "I/O bitmap - trap in"); 649 vmx_set_test_stage(3); 650 outw(0x0, 0x0); 651 report(vmx_get_test_stage() == 4, "I/O bitmap - trap out"); 652 vmx_set_test_stage(4); 653 inl(0x0); 654 report(vmx_get_test_stage() == 5, "I/O bitmap - I/O width, long"); 655 // test low/high IO port 656 vmx_set_test_stage(5); 657 ((u8 *)io_bitmap_a)[0x5000 / 8] = (1 << (0x5000 % 8)); 658 inb(0x5000); 659 report(vmx_get_test_stage() == 6, "I/O bitmap - I/O port, low part"); 660 vmx_set_test_stage(6); 661 ((u8 *)io_bitmap_b)[0x1000 / 8] = (1 << (0x1000 % 8)); 662 inb(0x9000); 663 report(vmx_get_test_stage() == 7, "I/O bitmap - I/O port, high part"); 664 // test partial pass 665 vmx_set_test_stage(7); 666 inl(0x4FFF); 667 report(vmx_get_test_stage() == 8, "I/O bitmap - partial pass"); 668 // test overrun 669 vmx_set_test_stage(8); 670 memset(io_bitmap_a, 0x0, PAGE_SIZE); 671 memset(io_bitmap_b, 0x0, PAGE_SIZE); 672 inl(0xFFFF); 673 report(vmx_get_test_stage() == 9, "I/O bitmap - overrun"); 674 vmx_set_test_stage(9); 675 vmcall(); 676 outb(0x0, 0x0); 677 report(vmx_get_test_stage() == 9, 678 "I/O bitmap - ignore unconditional exiting"); 679 vmx_set_test_stage(10); 680 vmcall(); 681 outb(0x0, 0x0); 682 report(vmx_get_test_stage() == 11, 683 "I/O bitmap - unconditional exiting"); 684 } 685 686 static int iobmp_exit_handler(union exit_reason exit_reason) 687 { 688 u64 guest_rip; 689 ulong exit_qual; 690 u32 insn_len, ctrl_cpu0; 691 692 guest_rip = vmcs_read(GUEST_RIP); 693 exit_qual = vmcs_read(EXI_QUALIFICATION); 694 insn_len = vmcs_read(EXI_INST_LEN); 695 switch (exit_reason.basic) { 696 case VMX_IO: 697 switch (vmx_get_test_stage()) { 698 case 0: 699 case 1: 700 vmx_inc_test_stage(); 701 break; 702 case 2: 703 report((exit_qual & VMX_IO_SIZE_MASK) == _VMX_IO_BYTE, 704 "I/O bitmap - I/O width, byte"); 705 report(exit_qual & VMX_IO_IN, 706 "I/O bitmap - I/O direction, in"); 707 vmx_inc_test_stage(); 708 break; 709 case 3: 710 report((exit_qual & VMX_IO_SIZE_MASK) == _VMX_IO_WORD, 711 "I/O bitmap - I/O width, word"); 712 report(!(exit_qual & VMX_IO_IN), 713 "I/O bitmap - I/O direction, out"); 714 vmx_inc_test_stage(); 715 break; 716 case 4: 717 report((exit_qual & VMX_IO_SIZE_MASK) == _VMX_IO_LONG, 718 "I/O bitmap - I/O width, long"); 719 vmx_inc_test_stage(); 720 break; 721 case 5: 722 if (((exit_qual & VMX_IO_PORT_MASK) >> VMX_IO_PORT_SHIFT) == 0x5000) 723 vmx_inc_test_stage(); 724 break; 725 case 6: 726 if (((exit_qual & VMX_IO_PORT_MASK) >> VMX_IO_PORT_SHIFT) == 0x9000) 727 vmx_inc_test_stage(); 728 break; 729 case 7: 730 if (((exit_qual & VMX_IO_PORT_MASK) >> VMX_IO_PORT_SHIFT) == 0x4FFF) 731 vmx_inc_test_stage(); 732 break; 733 case 8: 734 if (((exit_qual & VMX_IO_PORT_MASK) >> VMX_IO_PORT_SHIFT) == 0xFFFF) 735 vmx_inc_test_stage(); 736 break; 737 case 9: 738 case 10: 739 ctrl_cpu0 = vmcs_read(CPU_EXEC_CTRL0); 740 vmcs_write(CPU_EXEC_CTRL0, ctrl_cpu0 & ~CPU_IO); 741 vmx_inc_test_stage(); 742 break; 743 default: 744 // Should not reach here 745 report(false, "unexpected stage, %d", 746 vmx_get_test_stage()); 747 print_vmexit_info(exit_reason); 748 return VMX_TEST_VMEXIT; 749 } 750 vmcs_write(GUEST_RIP, guest_rip + insn_len); 751 return VMX_TEST_RESUME; 752 case VMX_VMCALL: 753 switch (vmx_get_test_stage()) { 754 case 9: 755 ctrl_cpu0 = vmcs_read(CPU_EXEC_CTRL0); 756 ctrl_cpu0 |= CPU_IO | CPU_IO_BITMAP; 757 vmcs_write(CPU_EXEC_CTRL0, ctrl_cpu0); 758 break; 759 case 10: 760 ctrl_cpu0 = vmcs_read(CPU_EXEC_CTRL0); 761 ctrl_cpu0 = (ctrl_cpu0 & ~CPU_IO_BITMAP) | CPU_IO; 762 vmcs_write(CPU_EXEC_CTRL0, ctrl_cpu0); 763 break; 764 default: 765 // Should not reach here 766 report(false, "unexpected stage, %d", 767 vmx_get_test_stage()); 768 print_vmexit_info(exit_reason); 769 return VMX_TEST_VMEXIT; 770 } 771 vmcs_write(GUEST_RIP, guest_rip + insn_len); 772 return VMX_TEST_RESUME; 773 default: 774 printf("guest_rip = %#lx\n", guest_rip); 775 printf("\tERROR : Unknown exit reason, 0x%x\n", exit_reason.full); 776 break; 777 } 778 return VMX_TEST_VMEXIT; 779 } 780 781 #define INSN_CPU0 0 782 #define INSN_CPU1 1 783 #define INSN_ALWAYS_TRAP 2 784 785 #define FIELD_EXIT_QUAL (1 << 0) 786 #define FIELD_INSN_INFO (1 << 1) 787 788 asm( 789 "insn_hlt: hlt;ret\n\t" 790 "insn_invlpg: invlpg 0x12345678;ret\n\t" 791 "insn_mwait: xor %eax, %eax; xor %ecx, %ecx; mwait;ret\n\t" 792 "insn_rdpmc: xor %ecx, %ecx; rdpmc;ret\n\t" 793 "insn_rdtsc: rdtsc;ret\n\t" 794 "insn_cr3_load: mov cr3,%rax; mov %rax,%cr3;ret\n\t" 795 "insn_cr3_store: mov %cr3,%rax;ret\n\t" 796 #ifdef __x86_64__ 797 "insn_cr8_load: xor %eax, %eax; mov %rax,%cr8;ret\n\t" 798 "insn_cr8_store: mov %cr8,%rax;ret\n\t" 799 #endif 800 "insn_monitor: xor %eax, %eax; xor %ecx, %ecx; xor %edx, %edx; monitor;ret\n\t" 801 "insn_pause: pause;ret\n\t" 802 "insn_wbinvd: wbinvd;ret\n\t" 803 "insn_cpuid: mov $10, %eax; cpuid;ret\n\t" 804 "insn_invd: invd;ret\n\t" 805 "insn_sgdt: sgdt gdt64_desc;ret\n\t" 806 "insn_lgdt: lgdt gdt64_desc;ret\n\t" 807 "insn_sidt: sidt idt_descr;ret\n\t" 808 "insn_lidt: lidt idt_descr;ret\n\t" 809 "insn_sldt: sldt %ax;ret\n\t" 810 "insn_lldt: xor %eax, %eax; lldt %ax;ret\n\t" 811 "insn_str: str %ax;ret\n\t" 812 "insn_rdrand: rdrand %rax;ret\n\t" 813 "insn_rdseed: rdseed %rax;ret\n\t" 814 ); 815 extern void insn_hlt(void); 816 extern void insn_invlpg(void); 817 extern void insn_mwait(void); 818 extern void insn_rdpmc(void); 819 extern void insn_rdtsc(void); 820 extern void insn_cr3_load(void); 821 extern void insn_cr3_store(void); 822 #ifdef __x86_64__ 823 extern void insn_cr8_load(void); 824 extern void insn_cr8_store(void); 825 #endif 826 extern void insn_monitor(void); 827 extern void insn_pause(void); 828 extern void insn_wbinvd(void); 829 extern void insn_sgdt(void); 830 extern void insn_lgdt(void); 831 extern void insn_sidt(void); 832 extern void insn_lidt(void); 833 extern void insn_sldt(void); 834 extern void insn_lldt(void); 835 extern void insn_str(void); 836 extern void insn_cpuid(void); 837 extern void insn_invd(void); 838 extern void insn_rdrand(void); 839 extern void insn_rdseed(void); 840 841 u32 cur_insn; 842 u64 cr3; 843 844 #define X86_FEATURE_MONITOR (1 << 3) 845 846 typedef bool (*supported_fn)(void); 847 848 static bool monitor_supported(void) 849 { 850 return this_cpu_has(X86_FEATURE_MWAIT); 851 } 852 853 struct insn_table { 854 const char *name; 855 u32 flag; 856 void (*insn_func)(void); 857 u32 type; 858 u32 reason; 859 ulong exit_qual; 860 u32 insn_info; 861 // Use FIELD_EXIT_QUAL and FIELD_INSN_INFO to define 862 // which field need to be tested, reason is always tested 863 u32 test_field; 864 const supported_fn supported_fn; 865 u8 disabled; 866 }; 867 868 /* 869 * Add more test cases of instruction intercept here. Elements in this 870 * table is: 871 * name/control flag/insn function/type/exit reason/exit qulification/ 872 * instruction info/field to test 873 * The last field defines which fields (exit_qual and insn_info) need to be 874 * tested in exit handler. If set to 0, only "reason" is checked. 875 */ 876 static struct insn_table insn_table[] = { 877 // Flags for Primary Processor-Based VM-Execution Controls 878 {"HLT", CPU_HLT, insn_hlt, INSN_CPU0, 12, 0, 0, 0}, 879 {"INVLPG", CPU_INVLPG, insn_invlpg, INSN_CPU0, 14, 880 0x12345678, 0, FIELD_EXIT_QUAL}, 881 {"MWAIT", CPU_MWAIT, insn_mwait, INSN_CPU0, 36, 0, 0, 0, &monitor_supported}, 882 {"RDPMC", CPU_RDPMC, insn_rdpmc, INSN_CPU0, 15, 0, 0, 0}, 883 {"RDTSC", CPU_RDTSC, insn_rdtsc, INSN_CPU0, 16, 0, 0, 0}, 884 {"CR3 load", CPU_CR3_LOAD, insn_cr3_load, INSN_CPU0, 28, 0x3, 0, 885 FIELD_EXIT_QUAL}, 886 {"CR3 store", CPU_CR3_STORE, insn_cr3_store, INSN_CPU0, 28, 0x13, 0, 887 FIELD_EXIT_QUAL}, 888 #ifdef __x86_64__ 889 {"CR8 load", CPU_CR8_LOAD, insn_cr8_load, INSN_CPU0, 28, 0x8, 0, 890 FIELD_EXIT_QUAL}, 891 {"CR8 store", CPU_CR8_STORE, insn_cr8_store, INSN_CPU0, 28, 0x18, 0, 892 FIELD_EXIT_QUAL}, 893 #endif 894 {"MONITOR", CPU_MONITOR, insn_monitor, INSN_CPU0, 39, 0, 0, 0, &monitor_supported}, 895 {"PAUSE", CPU_PAUSE, insn_pause, INSN_CPU0, 40, 0, 0, 0}, 896 // Flags for Secondary Processor-Based VM-Execution Controls 897 {"WBINVD", CPU_WBINVD, insn_wbinvd, INSN_CPU1, 54, 0, 0, 0}, 898 {"DESC_TABLE (SGDT)", CPU_DESC_TABLE, insn_sgdt, INSN_CPU1, 46, 0, 0, 0}, 899 {"DESC_TABLE (LGDT)", CPU_DESC_TABLE, insn_lgdt, INSN_CPU1, 46, 0, 0, 0}, 900 {"DESC_TABLE (SIDT)", CPU_DESC_TABLE, insn_sidt, INSN_CPU1, 46, 0, 0, 0}, 901 {"DESC_TABLE (LIDT)", CPU_DESC_TABLE, insn_lidt, INSN_CPU1, 46, 0, 0, 0}, 902 {"DESC_TABLE (SLDT)", CPU_DESC_TABLE, insn_sldt, INSN_CPU1, 47, 0, 0, 0}, 903 {"DESC_TABLE (LLDT)", CPU_DESC_TABLE, insn_lldt, INSN_CPU1, 47, 0, 0, 0}, 904 {"DESC_TABLE (STR)", CPU_DESC_TABLE, insn_str, INSN_CPU1, 47, 0, 0, 0}, 905 /* LTR causes a #GP if done with a busy selector, so it is not tested. */ 906 {"RDRAND", CPU_RDRAND, insn_rdrand, INSN_CPU1, VMX_RDRAND, 0, 0, 0}, 907 {"RDSEED", CPU_RDSEED, insn_rdseed, INSN_CPU1, VMX_RDSEED, 0, 0, 0}, 908 // Instructions always trap 909 {"CPUID", 0, insn_cpuid, INSN_ALWAYS_TRAP, 10, 0, 0, 0}, 910 {"INVD", 0, insn_invd, INSN_ALWAYS_TRAP, 13, 0, 0, 0}, 911 // Instructions never trap 912 {NULL}, 913 }; 914 915 static int insn_intercept_init(struct vmcs *vmcs) 916 { 917 u32 ctrl_cpu, cur_insn; 918 919 ctrl_cpu = ctrl_cpu_rev[0].set | CPU_SECONDARY; 920 ctrl_cpu &= ctrl_cpu_rev[0].clr; 921 vmcs_write(CPU_EXEC_CTRL0, ctrl_cpu); 922 vmcs_write(CPU_EXEC_CTRL1, ctrl_cpu_rev[1].set); 923 cr3 = read_cr3(); 924 925 for (cur_insn = 0; insn_table[cur_insn].name != NULL; cur_insn++) { 926 if (insn_table[cur_insn].supported_fn == NULL) 927 continue; 928 insn_table[cur_insn].disabled = !insn_table[cur_insn].supported_fn(); 929 } 930 return VMX_TEST_START; 931 } 932 933 static void insn_intercept_main(void) 934 { 935 for (cur_insn = 0; insn_table[cur_insn].name != NULL; cur_insn++) { 936 vmx_set_test_stage(cur_insn * 2); 937 if ((insn_table[cur_insn].type == INSN_CPU0 && 938 !(ctrl_cpu_rev[0].clr & insn_table[cur_insn].flag)) || 939 (insn_table[cur_insn].type == INSN_CPU1 && 940 !(ctrl_cpu_rev[1].clr & insn_table[cur_insn].flag))) { 941 printf("\tCPU_CTRL%d.CPU_%s is not supported.\n", 942 insn_table[cur_insn].type - INSN_CPU0, 943 insn_table[cur_insn].name); 944 continue; 945 } 946 947 if (insn_table[cur_insn].disabled) { 948 printf("\tFeature required for %s is not supported.\n", 949 insn_table[cur_insn].name); 950 continue; 951 } 952 953 if ((insn_table[cur_insn].type == INSN_CPU0 && 954 !(ctrl_cpu_rev[0].set & insn_table[cur_insn].flag)) || 955 (insn_table[cur_insn].type == INSN_CPU1 && 956 !(ctrl_cpu_rev[1].set & insn_table[cur_insn].flag))) { 957 /* skip hlt, it stalls the guest and is tested below */ 958 if (insn_table[cur_insn].insn_func != insn_hlt) 959 insn_table[cur_insn].insn_func(); 960 report(vmx_get_test_stage() == cur_insn * 2, 961 "execute %s", 962 insn_table[cur_insn].name); 963 } else if (insn_table[cur_insn].type != INSN_ALWAYS_TRAP) 964 printf("\tCPU_CTRL%d.CPU_%s always traps.\n", 965 insn_table[cur_insn].type - INSN_CPU0, 966 insn_table[cur_insn].name); 967 968 vmcall(); 969 970 insn_table[cur_insn].insn_func(); 971 report(vmx_get_test_stage() == cur_insn * 2 + 1, 972 "intercept %s", 973 insn_table[cur_insn].name); 974 975 vmx_set_test_stage(cur_insn * 2 + 1); 976 vmcall(); 977 } 978 } 979 980 static int insn_intercept_exit_handler(union exit_reason exit_reason) 981 { 982 u64 guest_rip; 983 ulong exit_qual; 984 u32 insn_len; 985 u32 insn_info; 986 bool pass; 987 988 guest_rip = vmcs_read(GUEST_RIP); 989 exit_qual = vmcs_read(EXI_QUALIFICATION); 990 insn_len = vmcs_read(EXI_INST_LEN); 991 insn_info = vmcs_read(EXI_INST_INFO); 992 993 if (exit_reason.basic == VMX_VMCALL) { 994 u32 val = 0; 995 996 if (insn_table[cur_insn].type == INSN_CPU0) 997 val = vmcs_read(CPU_EXEC_CTRL0); 998 else if (insn_table[cur_insn].type == INSN_CPU1) 999 val = vmcs_read(CPU_EXEC_CTRL1); 1000 1001 if (vmx_get_test_stage() & 1) 1002 val &= ~insn_table[cur_insn].flag; 1003 else 1004 val |= insn_table[cur_insn].flag; 1005 1006 if (insn_table[cur_insn].type == INSN_CPU0) 1007 vmcs_write(CPU_EXEC_CTRL0, val | ctrl_cpu_rev[0].set); 1008 else if (insn_table[cur_insn].type == INSN_CPU1) 1009 vmcs_write(CPU_EXEC_CTRL1, val | ctrl_cpu_rev[1].set); 1010 } else { 1011 pass = (cur_insn * 2 == vmx_get_test_stage()) && 1012 insn_table[cur_insn].reason == exit_reason.full; 1013 if (insn_table[cur_insn].test_field & FIELD_EXIT_QUAL && 1014 insn_table[cur_insn].exit_qual != exit_qual) 1015 pass = false; 1016 if (insn_table[cur_insn].test_field & FIELD_INSN_INFO && 1017 insn_table[cur_insn].insn_info != insn_info) 1018 pass = false; 1019 if (pass) 1020 vmx_inc_test_stage(); 1021 } 1022 vmcs_write(GUEST_RIP, guest_rip + insn_len); 1023 return VMX_TEST_RESUME; 1024 } 1025 1026 /** 1027 * __setup_ept - Setup the VMCS fields to enable Extended Page Tables (EPT) 1028 * @hpa: Host physical address of the top-level, a.k.a. root, EPT table 1029 * @enable_ad: Whether or not to enable Access/Dirty bits for EPT entries 1030 * 1031 * Returns 0 on success, 1 on failure. 1032 * 1033 * Note that @hpa doesn't need to point at actual memory if VM-Launch is 1034 * expected to fail, e.g. setup_dummy_ept() arbitrarily passes '0' to satisfy 1035 * the various EPTP consistency checks, but doesn't ensure backing for HPA '0'. 1036 */ 1037 static int __setup_ept(u64 hpa, bool enable_ad) 1038 { 1039 if (!(ctrl_cpu_rev[0].clr & CPU_SECONDARY) || 1040 !(ctrl_cpu_rev[1].clr & CPU_EPT)) { 1041 printf("\tEPT is not supported"); 1042 return 1; 1043 } 1044 if (!(ept_vpid.val & EPT_CAP_WB)) { 1045 printf("WB memtype for EPT walks not supported\n"); 1046 return 1; 1047 } 1048 if (!(ept_vpid.val & EPT_CAP_PWL4)) { 1049 printf("\tPWL4 is not supported\n"); 1050 return 1; 1051 } 1052 1053 eptp = EPT_MEM_TYPE_WB; 1054 eptp |= (3 << EPTP_PG_WALK_LEN_SHIFT); 1055 eptp |= hpa; 1056 if (enable_ad) 1057 eptp |= EPTP_AD_FLAG; 1058 1059 vmcs_write(EPTP, eptp); 1060 vmcs_write(CPU_EXEC_CTRL0, vmcs_read(CPU_EXEC_CTRL0)| CPU_SECONDARY); 1061 vmcs_write(CPU_EXEC_CTRL1, vmcs_read(CPU_EXEC_CTRL1)| CPU_EPT); 1062 1063 return 0; 1064 } 1065 1066 /** 1067 * setup_ept - Enable Extended Page Tables (EPT) and setup an identity map 1068 * @enable_ad: Whether or not to enable Access/Dirty bits for EPT entries 1069 * 1070 * Returns 0 on success, 1 on failure. 1071 * 1072 * This is the "real" function for setting up EPT tables, i.e. use this for 1073 * tests that need to run code in the guest with EPT enabled. 1074 */ 1075 static int setup_ept(bool enable_ad) 1076 { 1077 unsigned long end_of_memory; 1078 1079 pml4 = alloc_page(); 1080 1081 if (__setup_ept(virt_to_phys(pml4), enable_ad)) 1082 return 1; 1083 1084 end_of_memory = fwcfg_get_u64(FW_CFG_RAM_SIZE); 1085 if (end_of_memory < (1ul << 32)) 1086 end_of_memory = (1ul << 32); 1087 /* Cannot use large EPT pages if we need to track EPT 1088 * accessed/dirty bits at 4K granularity. 1089 */ 1090 setup_ept_range(pml4, 0, end_of_memory, 0, 1091 !enable_ad && ept_2m_supported(), 1092 EPT_WA | EPT_RA | EPT_EA); 1093 return 0; 1094 } 1095 1096 /** 1097 * setup_dummy_ept - Enable Extended Page Tables (EPT) with a dummy root HPA 1098 * 1099 * Setup EPT using a semi-arbitrary dummy root HPA. This function is intended 1100 * for use by tests that need EPT enabled to verify dependent VMCS controls 1101 * but never expect to fully enter the guest, i.e. don't need setup the actual 1102 * EPT tables. 1103 */ 1104 static void setup_dummy_ept(void) 1105 { 1106 if (__setup_ept(0, false)) 1107 report_abort("EPT setup unexpectedly failed"); 1108 } 1109 1110 static int enable_unrestricted_guest(void) 1111 { 1112 if (!(ctrl_cpu_rev[0].clr & CPU_SECONDARY) || 1113 !(ctrl_cpu_rev[1].clr & CPU_URG) || 1114 !(ctrl_cpu_rev[1].clr & CPU_EPT)) 1115 return 1; 1116 1117 setup_dummy_ept(); 1118 1119 vmcs_write(CPU_EXEC_CTRL0, vmcs_read(CPU_EXEC_CTRL0) | CPU_SECONDARY); 1120 vmcs_write(CPU_EXEC_CTRL1, vmcs_read(CPU_EXEC_CTRL1) | CPU_URG); 1121 1122 return 0; 1123 } 1124 1125 static void ept_enable_ad_bits(void) 1126 { 1127 eptp |= EPTP_AD_FLAG; 1128 vmcs_write(EPTP, eptp); 1129 } 1130 1131 static void ept_disable_ad_bits(void) 1132 { 1133 eptp &= ~EPTP_AD_FLAG; 1134 vmcs_write(EPTP, eptp); 1135 } 1136 1137 static int ept_ad_enabled(void) 1138 { 1139 return eptp & EPTP_AD_FLAG; 1140 } 1141 1142 static void ept_enable_ad_bits_or_skip_test(void) 1143 { 1144 if (!ept_ad_bits_supported()) 1145 test_skip("EPT AD bits not supported."); 1146 ept_enable_ad_bits(); 1147 } 1148 1149 static int apic_version; 1150 1151 static int ept_init_common(bool have_ad) 1152 { 1153 int ret; 1154 struct pci_dev pcidev; 1155 1156 if (setup_ept(have_ad)) 1157 return VMX_TEST_EXIT; 1158 data_page1 = alloc_page(); 1159 data_page2 = alloc_page(); 1160 *((u32 *)data_page1) = MAGIC_VAL_1; 1161 *((u32 *)data_page2) = MAGIC_VAL_2; 1162 install_ept(pml4, (unsigned long)data_page1, (unsigned long)data_page2, 1163 EPT_RA | EPT_WA | EPT_EA); 1164 1165 apic_version = apic_read(APIC_LVR); 1166 1167 ret = pci_find_dev(PCI_VENDOR_ID_REDHAT, PCI_DEVICE_ID_REDHAT_TEST); 1168 if (ret != PCIDEVADDR_INVALID) { 1169 pci_dev_init(&pcidev, ret); 1170 pci_physaddr = pcidev.resource[PCI_TESTDEV_BAR_MEM]; 1171 } 1172 1173 return VMX_TEST_START; 1174 } 1175 1176 static int ept_init(struct vmcs *vmcs) 1177 { 1178 return ept_init_common(false); 1179 } 1180 1181 static void ept_common(void) 1182 { 1183 vmx_set_test_stage(0); 1184 if (*((u32 *)data_page2) != MAGIC_VAL_1 || 1185 *((u32 *)data_page1) != MAGIC_VAL_1) 1186 report(0, "EPT basic framework - read"); 1187 else { 1188 *((u32 *)data_page2) = MAGIC_VAL_3; 1189 vmcall(); 1190 if (vmx_get_test_stage() == 1) { 1191 if (*((u32 *)data_page1) == MAGIC_VAL_3 && 1192 *((u32 *)data_page2) == MAGIC_VAL_2) 1193 report(1, "EPT basic framework"); 1194 else 1195 report(1, "EPT basic framework - remap"); 1196 } 1197 } 1198 // Test EPT Misconfigurations 1199 vmx_set_test_stage(1); 1200 vmcall(); 1201 *((u32 *)data_page1) = MAGIC_VAL_1; 1202 if (vmx_get_test_stage() != 2) { 1203 report(0, "EPT misconfigurations"); 1204 goto t1; 1205 } 1206 vmx_set_test_stage(2); 1207 vmcall(); 1208 *((u32 *)data_page1) = MAGIC_VAL_1; 1209 report(vmx_get_test_stage() == 3, "EPT misconfigurations"); 1210 t1: 1211 // Test EPT violation 1212 vmx_set_test_stage(3); 1213 vmcall(); 1214 *((u32 *)data_page1) = MAGIC_VAL_1; 1215 report(vmx_get_test_stage() == 4, "EPT violation - page permission"); 1216 // Violation caused by EPT paging structure 1217 vmx_set_test_stage(4); 1218 vmcall(); 1219 *((u32 *)data_page1) = MAGIC_VAL_2; 1220 report(vmx_get_test_stage() == 5, "EPT violation - paging structure"); 1221 1222 // MMIO Read/Write 1223 vmx_set_test_stage(5); 1224 vmcall(); 1225 1226 *(u32 volatile *)pci_physaddr; 1227 report(vmx_get_test_stage() == 6, "MMIO EPT violation - read"); 1228 1229 *(u32 volatile *)pci_physaddr = MAGIC_VAL_1; 1230 report(vmx_get_test_stage() == 7, "MMIO EPT violation - write"); 1231 } 1232 1233 static void ept_main(void) 1234 { 1235 ept_common(); 1236 1237 // Test EPT access to L1 MMIO 1238 vmx_set_test_stage(7); 1239 report(*((u32 *)0xfee00030UL) == apic_version, "EPT - MMIO access"); 1240 1241 // Test invalid operand for INVEPT 1242 vmcall(); 1243 report(vmx_get_test_stage() == 8, "EPT - unsupported INVEPT"); 1244 } 1245 1246 static bool invept_test(int type, u64 eptp) 1247 { 1248 bool ret, supported; 1249 1250 supported = ept_vpid.val & (EPT_CAP_INVEPT_SINGLE >> INVEPT_SINGLE << type); 1251 ret = invept(type, eptp); 1252 1253 if (ret == !supported) 1254 return false; 1255 1256 if (!supported) 1257 printf("WARNING: unsupported invept passed!\n"); 1258 else 1259 printf("WARNING: invept failed!\n"); 1260 1261 return true; 1262 } 1263 1264 static int pml_exit_handler(union exit_reason exit_reason) 1265 { 1266 u16 index, count; 1267 u64 *pmlbuf = pml_log; 1268 u64 guest_rip = vmcs_read(GUEST_RIP);; 1269 u64 guest_cr3 = vmcs_read(GUEST_CR3); 1270 u32 insn_len = vmcs_read(EXI_INST_LEN); 1271 1272 switch (exit_reason.basic) { 1273 case VMX_VMCALL: 1274 switch (vmx_get_test_stage()) { 1275 case 0: 1276 index = vmcs_read(GUEST_PML_INDEX); 1277 for (count = index + 1; count < PML_INDEX; count++) { 1278 if (pmlbuf[count] == (u64)data_page2) { 1279 vmx_inc_test_stage(); 1280 clear_ept_ad(pml4, guest_cr3, (unsigned long)data_page2); 1281 break; 1282 } 1283 } 1284 break; 1285 case 1: 1286 index = vmcs_read(GUEST_PML_INDEX); 1287 /* Keep clearing the dirty bit till a overflow */ 1288 clear_ept_ad(pml4, guest_cr3, (unsigned long)data_page2); 1289 break; 1290 default: 1291 report(false, "unexpected stage, %d.", 1292 vmx_get_test_stage()); 1293 print_vmexit_info(exit_reason); 1294 return VMX_TEST_VMEXIT; 1295 } 1296 vmcs_write(GUEST_RIP, guest_rip + insn_len); 1297 return VMX_TEST_RESUME; 1298 case VMX_PML_FULL: 1299 vmx_inc_test_stage(); 1300 vmcs_write(GUEST_PML_INDEX, PML_INDEX - 1); 1301 return VMX_TEST_RESUME; 1302 default: 1303 report(false, "Unknown exit reason, 0x%x", exit_reason.full); 1304 print_vmexit_info(exit_reason); 1305 } 1306 return VMX_TEST_VMEXIT; 1307 } 1308 1309 static int ept_exit_handler_common(union exit_reason exit_reason, bool have_ad) 1310 { 1311 u64 guest_rip; 1312 u64 guest_cr3; 1313 u32 insn_len; 1314 u32 exit_qual; 1315 static unsigned long data_page1_pte, data_page1_pte_pte, memaddr_pte, 1316 guest_pte_addr; 1317 1318 guest_rip = vmcs_read(GUEST_RIP); 1319 guest_cr3 = vmcs_read(GUEST_CR3); 1320 insn_len = vmcs_read(EXI_INST_LEN); 1321 exit_qual = vmcs_read(EXI_QUALIFICATION); 1322 pteval_t *ptep; 1323 switch (exit_reason.basic) { 1324 case VMX_VMCALL: 1325 switch (vmx_get_test_stage()) { 1326 case 0: 1327 check_ept_ad(pml4, guest_cr3, 1328 (unsigned long)data_page1, 1329 have_ad ? EPT_ACCESS_FLAG : 0, 1330 have_ad ? EPT_ACCESS_FLAG | EPT_DIRTY_FLAG : 0); 1331 check_ept_ad(pml4, guest_cr3, 1332 (unsigned long)data_page2, 1333 have_ad ? EPT_ACCESS_FLAG | EPT_DIRTY_FLAG : 0, 1334 have_ad ? EPT_ACCESS_FLAG | EPT_DIRTY_FLAG : 0); 1335 clear_ept_ad(pml4, guest_cr3, (unsigned long)data_page1); 1336 clear_ept_ad(pml4, guest_cr3, (unsigned long)data_page2); 1337 if (have_ad) 1338 ept_sync(INVEPT_SINGLE, eptp);; 1339 if (*((u32 *)data_page1) == MAGIC_VAL_3 && 1340 *((u32 *)data_page2) == MAGIC_VAL_2) { 1341 vmx_inc_test_stage(); 1342 install_ept(pml4, (unsigned long)data_page2, 1343 (unsigned long)data_page2, 1344 EPT_RA | EPT_WA | EPT_EA); 1345 } else 1346 report(0, "EPT basic framework - write"); 1347 break; 1348 case 1: 1349 install_ept(pml4, (unsigned long)data_page1, 1350 (unsigned long)data_page1, EPT_WA); 1351 ept_sync(INVEPT_SINGLE, eptp); 1352 break; 1353 case 2: 1354 install_ept(pml4, (unsigned long)data_page1, 1355 (unsigned long)data_page1, 1356 EPT_RA | EPT_WA | EPT_EA | 1357 (2 << EPT_MEM_TYPE_SHIFT)); 1358 ept_sync(INVEPT_SINGLE, eptp); 1359 break; 1360 case 3: 1361 clear_ept_ad(pml4, guest_cr3, (unsigned long)data_page1); 1362 TEST_ASSERT(get_ept_pte(pml4, (unsigned long)data_page1, 1363 1, &data_page1_pte)); 1364 set_ept_pte(pml4, (unsigned long)data_page1, 1365 1, data_page1_pte & ~EPT_PRESENT); 1366 ept_sync(INVEPT_SINGLE, eptp); 1367 break; 1368 case 4: 1369 ptep = get_pte_level((pgd_t *)guest_cr3, data_page1, /*level=*/2); 1370 guest_pte_addr = virt_to_phys(ptep) & PAGE_MASK; 1371 1372 TEST_ASSERT(get_ept_pte(pml4, guest_pte_addr, 2, &data_page1_pte_pte)); 1373 set_ept_pte(pml4, guest_pte_addr, 2, 1374 data_page1_pte_pte & ~EPT_PRESENT); 1375 ept_sync(INVEPT_SINGLE, eptp); 1376 break; 1377 case 5: 1378 install_ept(pml4, (unsigned long)pci_physaddr, 1379 (unsigned long)pci_physaddr, 0); 1380 ept_sync(INVEPT_SINGLE, eptp); 1381 break; 1382 case 7: 1383 if (!invept_test(0, eptp)) 1384 vmx_inc_test_stage(); 1385 break; 1386 // Should not reach here 1387 default: 1388 report(false, "ERROR - unexpected stage, %d.", 1389 vmx_get_test_stage()); 1390 print_vmexit_info(exit_reason); 1391 return VMX_TEST_VMEXIT; 1392 } 1393 vmcs_write(GUEST_RIP, guest_rip + insn_len); 1394 return VMX_TEST_RESUME; 1395 case VMX_EPT_MISCONFIG: 1396 switch (vmx_get_test_stage()) { 1397 case 1: 1398 case 2: 1399 vmx_inc_test_stage(); 1400 install_ept(pml4, (unsigned long)data_page1, 1401 (unsigned long)data_page1, 1402 EPT_RA | EPT_WA | EPT_EA); 1403 ept_sync(INVEPT_SINGLE, eptp); 1404 break; 1405 // Should not reach here 1406 default: 1407 report(false, "ERROR - unexpected stage, %d.", 1408 vmx_get_test_stage()); 1409 print_vmexit_info(exit_reason); 1410 return VMX_TEST_VMEXIT; 1411 } 1412 return VMX_TEST_RESUME; 1413 case VMX_EPT_VIOLATION: 1414 /* 1415 * Exit-qualifications are masked not to account for advanced 1416 * VM-exit information. Once KVM supports this feature, this 1417 * masking should be removed. 1418 */ 1419 exit_qual &= ~EPT_VLT_GUEST_MASK; 1420 1421 switch(vmx_get_test_stage()) { 1422 case 3: 1423 check_ept_ad(pml4, guest_cr3, (unsigned long)data_page1, 0, 1424 have_ad ? EPT_ACCESS_FLAG | EPT_DIRTY_FLAG : 0); 1425 clear_ept_ad(pml4, guest_cr3, (unsigned long)data_page1); 1426 if (exit_qual == (EPT_VLT_WR | EPT_VLT_LADDR_VLD | 1427 EPT_VLT_PADDR)) 1428 vmx_inc_test_stage(); 1429 set_ept_pte(pml4, (unsigned long)data_page1, 1430 1, data_page1_pte | (EPT_PRESENT)); 1431 ept_sync(INVEPT_SINGLE, eptp); 1432 break; 1433 case 4: 1434 check_ept_ad(pml4, guest_cr3, (unsigned long)data_page1, 0, 1435 have_ad ? EPT_ACCESS_FLAG | EPT_DIRTY_FLAG : 0); 1436 clear_ept_ad(pml4, guest_cr3, (unsigned long)data_page1); 1437 if (exit_qual == (EPT_VLT_RD | 1438 (have_ad ? EPT_VLT_WR : 0) | 1439 EPT_VLT_LADDR_VLD)) 1440 vmx_inc_test_stage(); 1441 set_ept_pte(pml4, guest_pte_addr, 2, 1442 data_page1_pte_pte | (EPT_PRESENT)); 1443 ept_sync(INVEPT_SINGLE, eptp); 1444 break; 1445 case 5: 1446 if (exit_qual & EPT_VLT_RD) 1447 vmx_inc_test_stage(); 1448 TEST_ASSERT(get_ept_pte(pml4, (unsigned long)pci_physaddr, 1449 1, &memaddr_pte)); 1450 set_ept_pte(pml4, memaddr_pte, 1, memaddr_pte | EPT_RA); 1451 ept_sync(INVEPT_SINGLE, eptp); 1452 break; 1453 case 6: 1454 if (exit_qual & EPT_VLT_WR) 1455 vmx_inc_test_stage(); 1456 TEST_ASSERT(get_ept_pte(pml4, (unsigned long)pci_physaddr, 1457 1, &memaddr_pte)); 1458 set_ept_pte(pml4, memaddr_pte, 1, memaddr_pte | EPT_RA | EPT_WA); 1459 ept_sync(INVEPT_SINGLE, eptp); 1460 break; 1461 default: 1462 // Should not reach here 1463 report(false, "ERROR : unexpected stage, %d", 1464 vmx_get_test_stage()); 1465 print_vmexit_info(exit_reason); 1466 return VMX_TEST_VMEXIT; 1467 } 1468 return VMX_TEST_RESUME; 1469 default: 1470 report(false, "Unknown exit reason, 0x%x", exit_reason.full); 1471 print_vmexit_info(exit_reason); 1472 } 1473 return VMX_TEST_VMEXIT; 1474 } 1475 1476 static int ept_exit_handler(union exit_reason exit_reason) 1477 { 1478 return ept_exit_handler_common(exit_reason, false); 1479 } 1480 1481 static int eptad_init(struct vmcs *vmcs) 1482 { 1483 int r = ept_init_common(true); 1484 1485 if (r == VMX_TEST_EXIT) 1486 return r; 1487 1488 if ((rdmsr(MSR_IA32_VMX_EPT_VPID_CAP) & EPT_CAP_AD_FLAG) == 0) { 1489 printf("\tEPT A/D bits are not supported"); 1490 return VMX_TEST_EXIT; 1491 } 1492 1493 return r; 1494 } 1495 1496 static int pml_init(struct vmcs *vmcs) 1497 { 1498 u32 ctrl_cpu; 1499 int r = eptad_init(vmcs); 1500 1501 if (r == VMX_TEST_EXIT) 1502 return r; 1503 1504 if (!(ctrl_cpu_rev[0].clr & CPU_SECONDARY) || 1505 !(ctrl_cpu_rev[1].clr & CPU_PML)) { 1506 printf("\tPML is not supported"); 1507 return VMX_TEST_EXIT; 1508 } 1509 1510 pml_log = alloc_page(); 1511 vmcs_write(PMLADDR, (u64)pml_log); 1512 vmcs_write(GUEST_PML_INDEX, PML_INDEX - 1); 1513 1514 ctrl_cpu = vmcs_read(CPU_EXEC_CTRL1) | CPU_PML; 1515 vmcs_write(CPU_EXEC_CTRL1, ctrl_cpu); 1516 1517 return VMX_TEST_START; 1518 } 1519 1520 static void pml_main(void) 1521 { 1522 int count = 0; 1523 1524 vmx_set_test_stage(0); 1525 *((u32 *)data_page2) = 0x1; 1526 vmcall(); 1527 report(vmx_get_test_stage() == 1, "PML - Dirty GPA Logging"); 1528 1529 while (vmx_get_test_stage() == 1) { 1530 vmcall(); 1531 *((u32 *)data_page2) = 0x1; 1532 if (count++ > PML_INDEX) 1533 break; 1534 } 1535 report(vmx_get_test_stage() == 2, "PML Full Event"); 1536 } 1537 1538 static void eptad_main(void) 1539 { 1540 ept_common(); 1541 } 1542 1543 static int eptad_exit_handler(union exit_reason exit_reason) 1544 { 1545 return ept_exit_handler_common(exit_reason, true); 1546 } 1547 1548 static bool invvpid_test(int type, u16 vpid) 1549 { 1550 bool ret, supported; 1551 1552 supported = ept_vpid.val & 1553 (VPID_CAP_INVVPID_ADDR >> INVVPID_ADDR << type); 1554 ret = invvpid(type, vpid, 0); 1555 1556 if (ret == !supported) 1557 return false; 1558 1559 if (!supported) 1560 printf("WARNING: unsupported invvpid passed!\n"); 1561 else 1562 printf("WARNING: invvpid failed!\n"); 1563 1564 return true; 1565 } 1566 1567 static int vpid_init(struct vmcs *vmcs) 1568 { 1569 u32 ctrl_cpu1; 1570 1571 if (!(ctrl_cpu_rev[0].clr & CPU_SECONDARY) || 1572 !(ctrl_cpu_rev[1].clr & CPU_VPID)) { 1573 printf("\tVPID is not supported"); 1574 return VMX_TEST_EXIT; 1575 } 1576 1577 ctrl_cpu1 = vmcs_read(CPU_EXEC_CTRL1); 1578 ctrl_cpu1 |= CPU_VPID; 1579 vmcs_write(CPU_EXEC_CTRL1, ctrl_cpu1); 1580 return VMX_TEST_START; 1581 } 1582 1583 static void vpid_main(void) 1584 { 1585 vmx_set_test_stage(0); 1586 vmcall(); 1587 report(vmx_get_test_stage() == 1, "INVVPID SINGLE ADDRESS"); 1588 vmx_set_test_stage(2); 1589 vmcall(); 1590 report(vmx_get_test_stage() == 3, "INVVPID SINGLE"); 1591 vmx_set_test_stage(4); 1592 vmcall(); 1593 report(vmx_get_test_stage() == 5, "INVVPID ALL"); 1594 } 1595 1596 static int vpid_exit_handler(union exit_reason exit_reason) 1597 { 1598 u64 guest_rip; 1599 u32 insn_len; 1600 1601 guest_rip = vmcs_read(GUEST_RIP); 1602 insn_len = vmcs_read(EXI_INST_LEN); 1603 1604 switch (exit_reason.basic) { 1605 case VMX_VMCALL: 1606 switch(vmx_get_test_stage()) { 1607 case 0: 1608 if (!invvpid_test(INVVPID_ADDR, 1)) 1609 vmx_inc_test_stage(); 1610 break; 1611 case 2: 1612 if (!invvpid_test(INVVPID_CONTEXT_GLOBAL, 1)) 1613 vmx_inc_test_stage(); 1614 break; 1615 case 4: 1616 if (!invvpid_test(INVVPID_ALL, 1)) 1617 vmx_inc_test_stage(); 1618 break; 1619 default: 1620 report(false, "ERROR: unexpected stage, %d", 1621 vmx_get_test_stage()); 1622 print_vmexit_info(exit_reason); 1623 return VMX_TEST_VMEXIT; 1624 } 1625 vmcs_write(GUEST_RIP, guest_rip + insn_len); 1626 return VMX_TEST_RESUME; 1627 default: 1628 report(false, "Unknown exit reason, 0x%x", exit_reason.full); 1629 print_vmexit_info(exit_reason); 1630 } 1631 return VMX_TEST_VMEXIT; 1632 } 1633 1634 #define TIMER_VECTOR 222 1635 1636 static volatile bool timer_fired; 1637 1638 static void timer_isr(isr_regs_t *regs) 1639 { 1640 timer_fired = true; 1641 apic_write(APIC_EOI, 0); 1642 } 1643 1644 static int interrupt_init(struct vmcs *vmcs) 1645 { 1646 msr_bmp_init(); 1647 vmcs_write(PIN_CONTROLS, vmcs_read(PIN_CONTROLS) & ~PIN_EXTINT); 1648 handle_irq(TIMER_VECTOR, timer_isr); 1649 return VMX_TEST_START; 1650 } 1651 1652 static void interrupt_main(void) 1653 { 1654 long long start, loops; 1655 1656 vmx_set_test_stage(0); 1657 1658 apic_write(APIC_LVTT, TIMER_VECTOR); 1659 irq_enable(); 1660 1661 apic_write(APIC_TMICT, 1); 1662 for (loops = 0; loops < 10000000 && !timer_fired; loops++) 1663 asm volatile ("nop"); 1664 report(timer_fired, "direct interrupt while running guest"); 1665 1666 apic_write(APIC_TMICT, 0); 1667 irq_disable(); 1668 vmcall(); 1669 timer_fired = false; 1670 apic_write(APIC_TMICT, 1); 1671 for (loops = 0; loops < 10000000 && !timer_fired; loops++) 1672 asm volatile ("nop"); 1673 report(timer_fired, "intercepted interrupt while running guest"); 1674 1675 irq_enable(); 1676 apic_write(APIC_TMICT, 0); 1677 irq_disable(); 1678 vmcall(); 1679 timer_fired = false; 1680 start = rdtsc(); 1681 apic_write(APIC_TMICT, 1000000); 1682 1683 asm volatile ("sti; hlt"); 1684 1685 report(rdtsc() - start > 1000000 && timer_fired, 1686 "direct interrupt + hlt"); 1687 1688 apic_write(APIC_TMICT, 0); 1689 irq_disable(); 1690 vmcall(); 1691 timer_fired = false; 1692 start = rdtsc(); 1693 apic_write(APIC_TMICT, 1000000); 1694 1695 asm volatile ("sti; hlt"); 1696 1697 report(rdtsc() - start > 10000 && timer_fired, 1698 "intercepted interrupt + hlt"); 1699 1700 apic_write(APIC_TMICT, 0); 1701 irq_disable(); 1702 vmcall(); 1703 timer_fired = false; 1704 start = rdtsc(); 1705 apic_write(APIC_TMICT, 1000000); 1706 1707 irq_enable(); 1708 asm volatile ("nop"); 1709 vmcall(); 1710 1711 report(rdtsc() - start > 10000 && timer_fired, 1712 "direct interrupt + activity state hlt"); 1713 1714 apic_write(APIC_TMICT, 0); 1715 irq_disable(); 1716 vmcall(); 1717 timer_fired = false; 1718 start = rdtsc(); 1719 apic_write(APIC_TMICT, 1000000); 1720 1721 irq_enable(); 1722 asm volatile ("nop"); 1723 vmcall(); 1724 1725 report(rdtsc() - start > 10000 && timer_fired, 1726 "intercepted interrupt + activity state hlt"); 1727 1728 apic_write(APIC_TMICT, 0); 1729 irq_disable(); 1730 vmx_set_test_stage(7); 1731 vmcall(); 1732 timer_fired = false; 1733 apic_write(APIC_TMICT, 1); 1734 for (loops = 0; loops < 10000000 && !timer_fired; loops++) 1735 asm volatile ("nop"); 1736 report(timer_fired, 1737 "running a guest with interrupt acknowledgement set"); 1738 1739 apic_write(APIC_TMICT, 0); 1740 irq_enable(); 1741 timer_fired = false; 1742 vmcall(); 1743 report(timer_fired, "Inject an event to a halted guest"); 1744 } 1745 1746 static int interrupt_exit_handler(union exit_reason exit_reason) 1747 { 1748 u64 guest_rip = vmcs_read(GUEST_RIP); 1749 u32 insn_len = vmcs_read(EXI_INST_LEN); 1750 1751 switch (exit_reason.basic) { 1752 case VMX_VMCALL: 1753 switch (vmx_get_test_stage()) { 1754 case 0: 1755 case 2: 1756 case 5: 1757 vmcs_write(PIN_CONTROLS, 1758 vmcs_read(PIN_CONTROLS) | PIN_EXTINT); 1759 break; 1760 case 7: 1761 vmcs_write(EXI_CONTROLS, vmcs_read(EXI_CONTROLS) | EXI_INTA); 1762 vmcs_write(PIN_CONTROLS, 1763 vmcs_read(PIN_CONTROLS) | PIN_EXTINT); 1764 break; 1765 case 1: 1766 case 3: 1767 vmcs_write(PIN_CONTROLS, 1768 vmcs_read(PIN_CONTROLS) & ~PIN_EXTINT); 1769 break; 1770 case 4: 1771 case 6: 1772 vmcs_write(GUEST_ACTV_STATE, ACTV_HLT); 1773 break; 1774 1775 case 8: 1776 vmcs_write(GUEST_ACTV_STATE, ACTV_HLT); 1777 vmcs_write(ENT_INTR_INFO, 1778 TIMER_VECTOR | 1779 (VMX_INTR_TYPE_EXT_INTR << INTR_INFO_INTR_TYPE_SHIFT) | 1780 INTR_INFO_VALID_MASK); 1781 break; 1782 } 1783 vmx_inc_test_stage(); 1784 vmcs_write(GUEST_RIP, guest_rip + insn_len); 1785 return VMX_TEST_RESUME; 1786 case VMX_EXTINT: 1787 if (vmcs_read(EXI_CONTROLS) & EXI_INTA) { 1788 int vector = vmcs_read(EXI_INTR_INFO) & 0xff; 1789 handle_external_interrupt(vector); 1790 } else { 1791 irq_enable(); 1792 asm volatile ("nop"); 1793 irq_disable(); 1794 } 1795 if (vmx_get_test_stage() >= 2) 1796 vmcs_write(GUEST_ACTV_STATE, ACTV_ACTIVE); 1797 return VMX_TEST_RESUME; 1798 default: 1799 report(false, "Unknown exit reason, 0x%x", exit_reason.full); 1800 print_vmexit_info(exit_reason); 1801 } 1802 1803 return VMX_TEST_VMEXIT; 1804 } 1805 1806 1807 static volatile int nmi_fired; 1808 1809 #define NMI_DELAY 100000000ULL 1810 1811 static void nmi_isr(isr_regs_t *regs) 1812 { 1813 nmi_fired = true; 1814 } 1815 1816 static int nmi_hlt_init(struct vmcs *vmcs) 1817 { 1818 msr_bmp_init(); 1819 handle_irq(NMI_VECTOR, nmi_isr); 1820 vmcs_write(PIN_CONTROLS, 1821 vmcs_read(PIN_CONTROLS) & ~PIN_NMI); 1822 vmcs_write(PIN_CONTROLS, 1823 vmcs_read(PIN_CONTROLS) & ~PIN_VIRT_NMI); 1824 return VMX_TEST_START; 1825 } 1826 1827 static void nmi_message_thread(void *data) 1828 { 1829 while (vmx_get_test_stage() != 1) 1830 pause(); 1831 1832 delay(NMI_DELAY); 1833 apic_icr_write(APIC_DEST_PHYSICAL | APIC_DM_NMI | APIC_INT_ASSERT, id_map[0]); 1834 1835 while (vmx_get_test_stage() != 2) 1836 pause(); 1837 1838 delay(NMI_DELAY); 1839 apic_icr_write(APIC_DEST_PHYSICAL | APIC_DM_NMI | APIC_INT_ASSERT, id_map[0]); 1840 } 1841 1842 static void nmi_hlt_main(void) 1843 { 1844 long long start; 1845 1846 if (cpu_count() < 2) { 1847 report_skip(__func__); 1848 vmx_set_test_stage(-1); 1849 return; 1850 } 1851 1852 vmx_set_test_stage(0); 1853 on_cpu_async(1, nmi_message_thread, NULL); 1854 start = rdtsc(); 1855 vmx_set_test_stage(1); 1856 asm volatile ("hlt"); 1857 report((rdtsc() - start > NMI_DELAY) && nmi_fired, 1858 "direct NMI + hlt"); 1859 if (!nmi_fired) 1860 vmx_set_test_stage(-1); 1861 nmi_fired = false; 1862 1863 vmcall(); 1864 1865 start = rdtsc(); 1866 vmx_set_test_stage(2); 1867 asm volatile ("hlt"); 1868 report((rdtsc() - start > NMI_DELAY) && !nmi_fired, 1869 "intercepted NMI + hlt"); 1870 if (nmi_fired) { 1871 report(!nmi_fired, "intercepted NMI was dispatched"); 1872 vmx_set_test_stage(-1); 1873 return; 1874 } 1875 vmx_set_test_stage(3); 1876 } 1877 1878 static int nmi_hlt_exit_handler(union exit_reason exit_reason) 1879 { 1880 u64 guest_rip = vmcs_read(GUEST_RIP); 1881 u32 insn_len = vmcs_read(EXI_INST_LEN); 1882 1883 switch (vmx_get_test_stage()) { 1884 case 1: 1885 if (exit_reason.basic != VMX_VMCALL) { 1886 report(false, "VMEXIT not due to vmcall. Exit reason 0x%x", 1887 exit_reason.full); 1888 print_vmexit_info(exit_reason); 1889 return VMX_TEST_VMEXIT; 1890 } 1891 1892 vmcs_write(PIN_CONTROLS, 1893 vmcs_read(PIN_CONTROLS) | PIN_NMI); 1894 vmcs_write(PIN_CONTROLS, 1895 vmcs_read(PIN_CONTROLS) | PIN_VIRT_NMI); 1896 vmcs_write(GUEST_RIP, guest_rip + insn_len); 1897 break; 1898 1899 case 2: 1900 if (exit_reason.basic != VMX_EXC_NMI) { 1901 report(false, "VMEXIT not due to NMI intercept. Exit reason 0x%x", 1902 exit_reason.full); 1903 print_vmexit_info(exit_reason); 1904 return VMX_TEST_VMEXIT; 1905 } 1906 report(true, "NMI intercept while running guest"); 1907 vmcs_write(GUEST_ACTV_STATE, ACTV_ACTIVE); 1908 break; 1909 1910 case 3: 1911 break; 1912 1913 default: 1914 return VMX_TEST_VMEXIT; 1915 } 1916 1917 if (vmx_get_test_stage() == 3) 1918 return VMX_TEST_VMEXIT; 1919 1920 return VMX_TEST_RESUME; 1921 } 1922 1923 1924 static int dbgctls_init(struct vmcs *vmcs) 1925 { 1926 u64 dr7 = 0x402; 1927 u64 zero = 0; 1928 1929 msr_bmp_init(); 1930 asm volatile( 1931 "mov %0,%%dr0\n\t" 1932 "mov %0,%%dr1\n\t" 1933 "mov %0,%%dr2\n\t" 1934 "mov %1,%%dr7\n\t" 1935 : : "r" (zero), "r" (dr7)); 1936 wrmsr(MSR_IA32_DEBUGCTLMSR, 0x1); 1937 vmcs_write(GUEST_DR7, 0x404); 1938 vmcs_write(GUEST_DEBUGCTL, 0x2); 1939 1940 vmcs_write(ENT_CONTROLS, vmcs_read(ENT_CONTROLS) | ENT_LOAD_DBGCTLS); 1941 vmcs_write(EXI_CONTROLS, vmcs_read(EXI_CONTROLS) | EXI_SAVE_DBGCTLS); 1942 1943 return VMX_TEST_START; 1944 } 1945 1946 static void dbgctls_main(void) 1947 { 1948 u64 dr7, debugctl; 1949 1950 asm volatile("mov %%dr7,%0" : "=r" (dr7)); 1951 debugctl = rdmsr(MSR_IA32_DEBUGCTLMSR); 1952 /* Commented out: KVM does not support DEBUGCTL so far */ 1953 (void)debugctl; 1954 report(dr7 == 0x404, "Load debug controls" /* && debugctl == 0x2 */); 1955 1956 dr7 = 0x408; 1957 asm volatile("mov %0,%%dr7" : : "r" (dr7)); 1958 wrmsr(MSR_IA32_DEBUGCTLMSR, 0x3); 1959 1960 vmx_set_test_stage(0); 1961 vmcall(); 1962 report(vmx_get_test_stage() == 1, "Save debug controls"); 1963 1964 if (ctrl_enter_rev.set & ENT_LOAD_DBGCTLS || 1965 ctrl_exit_rev.set & EXI_SAVE_DBGCTLS) { 1966 printf("\tDebug controls are always loaded/saved\n"); 1967 return; 1968 } 1969 vmx_set_test_stage(2); 1970 vmcall(); 1971 1972 asm volatile("mov %%dr7,%0" : "=r" (dr7)); 1973 debugctl = rdmsr(MSR_IA32_DEBUGCTLMSR); 1974 /* Commented out: KVM does not support DEBUGCTL so far */ 1975 (void)debugctl; 1976 report(dr7 == 0x402, 1977 "Guest=host debug controls" /* && debugctl == 0x1 */); 1978 1979 dr7 = 0x408; 1980 asm volatile("mov %0,%%dr7" : : "r" (dr7)); 1981 wrmsr(MSR_IA32_DEBUGCTLMSR, 0x3); 1982 1983 vmx_set_test_stage(3); 1984 vmcall(); 1985 report(vmx_get_test_stage() == 4, "Don't save debug controls"); 1986 } 1987 1988 static int dbgctls_exit_handler(union exit_reason exit_reason) 1989 { 1990 u32 insn_len = vmcs_read(EXI_INST_LEN); 1991 u64 guest_rip = vmcs_read(GUEST_RIP); 1992 u64 dr7, debugctl; 1993 1994 asm volatile("mov %%dr7,%0" : "=r" (dr7)); 1995 debugctl = rdmsr(MSR_IA32_DEBUGCTLMSR); 1996 1997 switch (exit_reason.basic) { 1998 case VMX_VMCALL: 1999 switch (vmx_get_test_stage()) { 2000 case 0: 2001 if (dr7 == 0x400 && debugctl == 0 && 2002 vmcs_read(GUEST_DR7) == 0x408 /* && 2003 Commented out: KVM does not support DEBUGCTL so far 2004 vmcs_read(GUEST_DEBUGCTL) == 0x3 */) 2005 vmx_inc_test_stage(); 2006 break; 2007 case 2: 2008 dr7 = 0x402; 2009 asm volatile("mov %0,%%dr7" : : "r" (dr7)); 2010 wrmsr(MSR_IA32_DEBUGCTLMSR, 0x1); 2011 vmcs_write(GUEST_DR7, 0x404); 2012 vmcs_write(GUEST_DEBUGCTL, 0x2); 2013 2014 vmcs_write(ENT_CONTROLS, 2015 vmcs_read(ENT_CONTROLS) & ~ENT_LOAD_DBGCTLS); 2016 vmcs_write(EXI_CONTROLS, 2017 vmcs_read(EXI_CONTROLS) & ~EXI_SAVE_DBGCTLS); 2018 break; 2019 case 3: 2020 if (dr7 == 0x400 && debugctl == 0 && 2021 vmcs_read(GUEST_DR7) == 0x404 /* && 2022 Commented out: KVM does not support DEBUGCTL so far 2023 vmcs_read(GUEST_DEBUGCTL) == 0x2 */) 2024 vmx_inc_test_stage(); 2025 break; 2026 } 2027 vmcs_write(GUEST_RIP, guest_rip + insn_len); 2028 return VMX_TEST_RESUME; 2029 default: 2030 report(false, "Unknown exit reason, %d", exit_reason.full); 2031 print_vmexit_info(exit_reason); 2032 } 2033 return VMX_TEST_VMEXIT; 2034 } 2035 2036 struct vmx_msr_entry { 2037 u32 index; 2038 u32 reserved; 2039 u64 value; 2040 } __attribute__((packed)); 2041 2042 #define MSR_MAGIC 0x31415926 2043 struct vmx_msr_entry *exit_msr_store, *entry_msr_load, *exit_msr_load; 2044 2045 static int msr_switch_init(struct vmcs *vmcs) 2046 { 2047 msr_bmp_init(); 2048 exit_msr_store = alloc_page(); 2049 exit_msr_load = alloc_page(); 2050 entry_msr_load = alloc_page(); 2051 entry_msr_load[0].index = MSR_KERNEL_GS_BASE; 2052 entry_msr_load[0].value = MSR_MAGIC; 2053 2054 vmx_set_test_stage(1); 2055 vmcs_write(ENT_MSR_LD_CNT, 1); 2056 vmcs_write(ENTER_MSR_LD_ADDR, (u64)entry_msr_load); 2057 vmcs_write(EXI_MSR_ST_CNT, 1); 2058 vmcs_write(EXIT_MSR_ST_ADDR, (u64)exit_msr_store); 2059 vmcs_write(EXI_MSR_LD_CNT, 1); 2060 vmcs_write(EXIT_MSR_LD_ADDR, (u64)exit_msr_load); 2061 return VMX_TEST_START; 2062 } 2063 2064 static void msr_switch_main(void) 2065 { 2066 if (vmx_get_test_stage() == 1) { 2067 report(rdmsr(MSR_KERNEL_GS_BASE) == MSR_MAGIC, 2068 "VM entry MSR load"); 2069 vmx_set_test_stage(2); 2070 wrmsr(MSR_KERNEL_GS_BASE, MSR_MAGIC + 1); 2071 exit_msr_store[0].index = MSR_KERNEL_GS_BASE; 2072 exit_msr_load[0].index = MSR_KERNEL_GS_BASE; 2073 exit_msr_load[0].value = MSR_MAGIC + 2; 2074 } 2075 vmcall(); 2076 } 2077 2078 static int msr_switch_exit_handler(union exit_reason exit_reason) 2079 { 2080 if (exit_reason.basic == VMX_VMCALL && vmx_get_test_stage() == 2) { 2081 report(exit_msr_store[0].value == MSR_MAGIC + 1, 2082 "VM exit MSR store"); 2083 report(rdmsr(MSR_KERNEL_GS_BASE) == MSR_MAGIC + 2, 2084 "VM exit MSR load"); 2085 vmx_set_test_stage(3); 2086 entry_msr_load[0].index = MSR_FS_BASE; 2087 return VMX_TEST_RESUME; 2088 } 2089 printf("ERROR %s: unexpected stage=%u or reason=0x%x\n", 2090 __func__, vmx_get_test_stage(), exit_reason.full); 2091 return VMX_TEST_EXIT; 2092 } 2093 2094 static int msr_switch_entry_failure(struct vmentry_result *result) 2095 { 2096 if (result->vm_fail) { 2097 printf("ERROR %s: VM-Fail on %s\n", __func__, result->instr); 2098 return VMX_TEST_EXIT; 2099 } 2100 2101 if (result->exit_reason.failed_vmentry && 2102 result->exit_reason.basic == VMX_FAIL_MSR && 2103 vmx_get_test_stage() == 3) { 2104 report(vmcs_read(EXI_QUALIFICATION) == 1, 2105 "VM entry MSR load: try to load FS_BASE"); 2106 return VMX_TEST_VMEXIT; 2107 } 2108 printf("ERROR %s: unexpected stage=%u or reason=%x\n", 2109 __func__, vmx_get_test_stage(), result->exit_reason.full); 2110 return VMX_TEST_EXIT; 2111 } 2112 2113 static int vmmcall_init(struct vmcs *vmcs) 2114 { 2115 vmcs_write(EXC_BITMAP, 1 << UD_VECTOR); 2116 return VMX_TEST_START; 2117 } 2118 2119 static void vmmcall_main(void) 2120 { 2121 asm volatile( 2122 "mov $0xABCD, %%rax\n\t" 2123 "vmmcall\n\t" 2124 ::: "rax"); 2125 2126 report(0, "VMMCALL"); 2127 } 2128 2129 static int vmmcall_exit_handler(union exit_reason exit_reason) 2130 { 2131 switch (exit_reason.basic) { 2132 case VMX_VMCALL: 2133 printf("here\n"); 2134 report(0, "VMMCALL triggers #UD"); 2135 break; 2136 case VMX_EXC_NMI: 2137 report((vmcs_read(EXI_INTR_INFO) & 0xff) == UD_VECTOR, 2138 "VMMCALL triggers #UD"); 2139 break; 2140 default: 2141 report(false, "Unknown exit reason, 0x%x", exit_reason.full); 2142 print_vmexit_info(exit_reason); 2143 } 2144 2145 return VMX_TEST_VMEXIT; 2146 } 2147 2148 static int disable_rdtscp_init(struct vmcs *vmcs) 2149 { 2150 u32 ctrl_cpu1; 2151 2152 if (ctrl_cpu_rev[0].clr & CPU_SECONDARY) { 2153 ctrl_cpu1 = vmcs_read(CPU_EXEC_CTRL1); 2154 ctrl_cpu1 &= ~CPU_RDTSCP; 2155 vmcs_write(CPU_EXEC_CTRL1, ctrl_cpu1); 2156 } 2157 2158 return VMX_TEST_START; 2159 } 2160 2161 static void disable_rdtscp_ud_handler(struct ex_regs *regs) 2162 { 2163 switch (vmx_get_test_stage()) { 2164 case 0: 2165 report(true, "RDTSCP triggers #UD"); 2166 vmx_inc_test_stage(); 2167 regs->rip += 3; 2168 break; 2169 case 2: 2170 report(true, "RDPID triggers #UD"); 2171 vmx_inc_test_stage(); 2172 regs->rip += 4; 2173 break; 2174 } 2175 return; 2176 2177 } 2178 2179 static void disable_rdtscp_main(void) 2180 { 2181 /* Test that #UD is properly injected in L2. */ 2182 handle_exception(UD_VECTOR, disable_rdtscp_ud_handler); 2183 2184 vmx_set_test_stage(0); 2185 asm volatile("rdtscp" : : : "eax", "ecx", "edx"); 2186 vmcall(); 2187 asm volatile(".byte 0xf3, 0x0f, 0xc7, 0xf8" : : : "eax"); 2188 2189 handle_exception(UD_VECTOR, 0); 2190 vmcall(); 2191 } 2192 2193 static int disable_rdtscp_exit_handler(union exit_reason exit_reason) 2194 { 2195 switch (exit_reason.basic) { 2196 case VMX_VMCALL: 2197 switch (vmx_get_test_stage()) { 2198 case 0: 2199 report(false, "RDTSCP triggers #UD"); 2200 vmx_inc_test_stage(); 2201 /* fallthrough */ 2202 case 1: 2203 vmx_inc_test_stage(); 2204 vmcs_write(GUEST_RIP, vmcs_read(GUEST_RIP) + 3); 2205 return VMX_TEST_RESUME; 2206 case 2: 2207 report(false, "RDPID triggers #UD"); 2208 break; 2209 } 2210 break; 2211 2212 default: 2213 report(false, "Unknown exit reason, 0x%x", exit_reason.full); 2214 print_vmexit_info(exit_reason); 2215 } 2216 return VMX_TEST_VMEXIT; 2217 } 2218 2219 static int int3_init(struct vmcs *vmcs) 2220 { 2221 vmcs_write(EXC_BITMAP, ~0u); 2222 return VMX_TEST_START; 2223 } 2224 2225 static void int3_guest_main(void) 2226 { 2227 asm volatile ("int3"); 2228 } 2229 2230 static int int3_exit_handler(union exit_reason exit_reason) 2231 { 2232 u32 intr_info = vmcs_read(EXI_INTR_INFO); 2233 2234 report(exit_reason.basic == VMX_EXC_NMI && 2235 (intr_info & INTR_INFO_VALID_MASK) && 2236 (intr_info & INTR_INFO_VECTOR_MASK) == BP_VECTOR && 2237 ((intr_info & INTR_INFO_INTR_TYPE_MASK) >> 2238 INTR_INFO_INTR_TYPE_SHIFT) == VMX_INTR_TYPE_SOFT_EXCEPTION, 2239 "L1 intercepts #BP"); 2240 2241 return VMX_TEST_VMEXIT; 2242 } 2243 2244 static int into_init(struct vmcs *vmcs) 2245 { 2246 vmcs_write(EXC_BITMAP, ~0u); 2247 return VMX_TEST_START; 2248 } 2249 2250 static void into_guest_main(void) 2251 { 2252 struct far_pointer32 fp = { 2253 .offset = (uintptr_t)&&into, 2254 .selector = KERNEL_CS32, 2255 }; 2256 register uintptr_t rsp asm("rsp"); 2257 2258 if (fp.offset != (uintptr_t)&&into) { 2259 printf("Code address too high.\n"); 2260 return; 2261 } 2262 if ((u32)rsp != rsp) { 2263 printf("Stack address too high.\n"); 2264 return; 2265 } 2266 2267 asm goto ("lcall *%0" : : "m" (fp) : "rax" : into); 2268 return; 2269 into: 2270 asm volatile (".code32;" 2271 "movl $0x7fffffff, %eax;" 2272 "addl %eax, %eax;" 2273 "into;" 2274 "lret;" 2275 ".code64"); 2276 __builtin_unreachable(); 2277 } 2278 2279 static int into_exit_handler(union exit_reason exit_reason) 2280 { 2281 u32 intr_info = vmcs_read(EXI_INTR_INFO); 2282 2283 report(exit_reason.basic == VMX_EXC_NMI && 2284 (intr_info & INTR_INFO_VALID_MASK) && 2285 (intr_info & INTR_INFO_VECTOR_MASK) == OF_VECTOR && 2286 ((intr_info & INTR_INFO_INTR_TYPE_MASK) >> 2287 INTR_INFO_INTR_TYPE_SHIFT) == VMX_INTR_TYPE_SOFT_EXCEPTION, 2288 "L1 intercepts #OF"); 2289 2290 return VMX_TEST_VMEXIT; 2291 } 2292 2293 static void exit_monitor_from_l2_main(void) 2294 { 2295 printf("Calling exit(0) from l2...\n"); 2296 exit(0); 2297 } 2298 2299 static int exit_monitor_from_l2_handler(union exit_reason exit_reason) 2300 { 2301 report(false, "The guest should have killed the VMM"); 2302 return VMX_TEST_EXIT; 2303 } 2304 2305 static void assert_exit_reason(u64 expected) 2306 { 2307 u64 actual = vmcs_read(EXI_REASON); 2308 2309 TEST_ASSERT_EQ_MSG(expected, actual, "Expected %s, got %s.", 2310 exit_reason_description(expected), 2311 exit_reason_description(actual)); 2312 } 2313 2314 static void skip_exit_insn(void) 2315 { 2316 u64 guest_rip = vmcs_read(GUEST_RIP); 2317 u32 insn_len = vmcs_read(EXI_INST_LEN); 2318 vmcs_write(GUEST_RIP, guest_rip + insn_len); 2319 } 2320 2321 static void skip_exit_vmcall(void) 2322 { 2323 assert_exit_reason(VMX_VMCALL); 2324 skip_exit_insn(); 2325 } 2326 2327 static void v2_null_test_guest(void) 2328 { 2329 } 2330 2331 static void v2_null_test(void) 2332 { 2333 test_set_guest(v2_null_test_guest); 2334 enter_guest(); 2335 report(1, __func__); 2336 } 2337 2338 static void v2_multiple_entries_test_guest(void) 2339 { 2340 vmx_set_test_stage(1); 2341 vmcall(); 2342 vmx_set_test_stage(2); 2343 } 2344 2345 static void v2_multiple_entries_test(void) 2346 { 2347 test_set_guest(v2_multiple_entries_test_guest); 2348 enter_guest(); 2349 TEST_ASSERT_EQ(vmx_get_test_stage(), 1); 2350 skip_exit_vmcall(); 2351 enter_guest(); 2352 TEST_ASSERT_EQ(vmx_get_test_stage(), 2); 2353 report(1, __func__); 2354 } 2355 2356 static int fixture_test_data = 1; 2357 2358 static void fixture_test_teardown(void *data) 2359 { 2360 *((int *) data) = 1; 2361 } 2362 2363 static void fixture_test_guest(void) 2364 { 2365 fixture_test_data++; 2366 } 2367 2368 2369 static void fixture_test_setup(void) 2370 { 2371 TEST_ASSERT_EQ_MSG(1, fixture_test_data, 2372 "fixture_test_teardown didn't run?!"); 2373 fixture_test_data = 2; 2374 test_add_teardown(fixture_test_teardown, &fixture_test_data); 2375 test_set_guest(fixture_test_guest); 2376 } 2377 2378 static void fixture_test_case1(void) 2379 { 2380 fixture_test_setup(); 2381 TEST_ASSERT_EQ(2, fixture_test_data); 2382 enter_guest(); 2383 TEST_ASSERT_EQ(3, fixture_test_data); 2384 report(1, __func__); 2385 } 2386 2387 static void fixture_test_case2(void) 2388 { 2389 fixture_test_setup(); 2390 TEST_ASSERT_EQ(2, fixture_test_data); 2391 enter_guest(); 2392 TEST_ASSERT_EQ(3, fixture_test_data); 2393 report(1, __func__); 2394 } 2395 2396 enum ept_access_op { 2397 OP_READ, 2398 OP_WRITE, 2399 OP_EXEC, 2400 OP_FLUSH_TLB, 2401 OP_EXIT, 2402 }; 2403 2404 static struct ept_access_test_data { 2405 unsigned long gpa; 2406 unsigned long *gva; 2407 unsigned long hpa; 2408 unsigned long *hva; 2409 enum ept_access_op op; 2410 } ept_access_test_data; 2411 2412 extern unsigned char ret42_start; 2413 extern unsigned char ret42_end; 2414 2415 /* Returns 42. */ 2416 asm( 2417 ".align 64\n" 2418 "ret42_start:\n" 2419 "mov $42, %eax\n" 2420 "ret\n" 2421 "ret42_end:\n" 2422 ); 2423 2424 static void 2425 diagnose_ept_violation_qual(u64 expected, u64 actual) 2426 { 2427 2428 #define DIAGNOSE(flag) \ 2429 do { \ 2430 if ((expected & flag) != (actual & flag)) \ 2431 printf(#flag " %sexpected\n", \ 2432 (expected & flag) ? "" : "un"); \ 2433 } while (0) 2434 2435 DIAGNOSE(EPT_VLT_RD); 2436 DIAGNOSE(EPT_VLT_WR); 2437 DIAGNOSE(EPT_VLT_FETCH); 2438 DIAGNOSE(EPT_VLT_PERM_RD); 2439 DIAGNOSE(EPT_VLT_PERM_WR); 2440 DIAGNOSE(EPT_VLT_PERM_EX); 2441 DIAGNOSE(EPT_VLT_LADDR_VLD); 2442 DIAGNOSE(EPT_VLT_PADDR); 2443 2444 #undef DIAGNOSE 2445 } 2446 2447 static void do_ept_access_op(enum ept_access_op op) 2448 { 2449 ept_access_test_data.op = op; 2450 enter_guest(); 2451 } 2452 2453 /* 2454 * Force the guest to flush its TLB (i.e., flush gva -> gpa mappings). Only 2455 * needed by tests that modify guest PTEs. 2456 */ 2457 static void ept_access_test_guest_flush_tlb(void) 2458 { 2459 do_ept_access_op(OP_FLUSH_TLB); 2460 skip_exit_vmcall(); 2461 } 2462 2463 /* 2464 * Modifies the EPT entry at @level in the mapping of @gpa. First clears the 2465 * bits in @clear then sets the bits in @set. @mkhuge transforms the entry into 2466 * a huge page. 2467 */ 2468 static unsigned long ept_twiddle(unsigned long gpa, bool mkhuge, int level, 2469 unsigned long clear, unsigned long set) 2470 { 2471 struct ept_access_test_data *data = &ept_access_test_data; 2472 unsigned long orig_pte; 2473 unsigned long pte; 2474 2475 /* Screw with the mapping at the requested level. */ 2476 TEST_ASSERT(get_ept_pte(pml4, gpa, level, &orig_pte)); 2477 pte = orig_pte; 2478 if (mkhuge) 2479 pte = (orig_pte & ~EPT_ADDR_MASK) | data->hpa | EPT_LARGE_PAGE; 2480 else 2481 pte = orig_pte; 2482 pte = (pte & ~clear) | set; 2483 set_ept_pte(pml4, gpa, level, pte); 2484 ept_sync(INVEPT_SINGLE, eptp); 2485 2486 return orig_pte; 2487 } 2488 2489 static void ept_untwiddle(unsigned long gpa, int level, unsigned long orig_pte) 2490 { 2491 set_ept_pte(pml4, gpa, level, orig_pte); 2492 ept_sync(INVEPT_SINGLE, eptp); 2493 } 2494 2495 static void do_ept_violation(bool leaf, enum ept_access_op op, 2496 u64 expected_qual, u64 expected_paddr) 2497 { 2498 u64 qual; 2499 2500 /* Try the access and observe the violation. */ 2501 do_ept_access_op(op); 2502 2503 assert_exit_reason(VMX_EPT_VIOLATION); 2504 2505 qual = vmcs_read(EXI_QUALIFICATION); 2506 2507 /* Mask undefined bits (which may later be defined in certain cases). */ 2508 qual &= ~(EPT_VLT_GUEST_USER | EPT_VLT_GUEST_RW | EPT_VLT_GUEST_EX | 2509 EPT_VLT_PERM_USER_EX); 2510 2511 diagnose_ept_violation_qual(expected_qual, qual); 2512 TEST_EXPECT_EQ(expected_qual, qual); 2513 2514 #if 0 2515 /* Disable for now otherwise every test will fail */ 2516 TEST_EXPECT_EQ(vmcs_read(GUEST_LINEAR_ADDRESS), 2517 (unsigned long) ( 2518 op == OP_EXEC ? data->gva + 1 : data->gva)); 2519 #endif 2520 /* 2521 * TODO: tests that probe expected_paddr in pages other than the one at 2522 * the beginning of the 1g region. 2523 */ 2524 TEST_EXPECT_EQ(vmcs_read(INFO_PHYS_ADDR), expected_paddr); 2525 } 2526 2527 static void 2528 ept_violation_at_level_mkhuge(bool mkhuge, int level, unsigned long clear, 2529 unsigned long set, enum ept_access_op op, 2530 u64 expected_qual) 2531 { 2532 struct ept_access_test_data *data = &ept_access_test_data; 2533 unsigned long orig_pte; 2534 2535 orig_pte = ept_twiddle(data->gpa, mkhuge, level, clear, set); 2536 2537 do_ept_violation(level == 1 || mkhuge, op, expected_qual, 2538 op == OP_EXEC ? data->gpa + sizeof(unsigned long) : 2539 data->gpa); 2540 2541 /* Fix the violation and resume the op loop. */ 2542 ept_untwiddle(data->gpa, level, orig_pte); 2543 enter_guest(); 2544 skip_exit_vmcall(); 2545 } 2546 2547 static void 2548 ept_violation_at_level(int level, unsigned long clear, unsigned long set, 2549 enum ept_access_op op, u64 expected_qual) 2550 { 2551 ept_violation_at_level_mkhuge(false, level, clear, set, op, 2552 expected_qual); 2553 if (ept_huge_pages_supported(level)) 2554 ept_violation_at_level_mkhuge(true, level, clear, set, op, 2555 expected_qual); 2556 } 2557 2558 static void ept_violation(unsigned long clear, unsigned long set, 2559 enum ept_access_op op, u64 expected_qual) 2560 { 2561 ept_violation_at_level(1, clear, set, op, expected_qual); 2562 ept_violation_at_level(2, clear, set, op, expected_qual); 2563 ept_violation_at_level(3, clear, set, op, expected_qual); 2564 ept_violation_at_level(4, clear, set, op, expected_qual); 2565 } 2566 2567 static void ept_access_violation(unsigned long access, enum ept_access_op op, 2568 u64 expected_qual) 2569 { 2570 ept_violation(EPT_PRESENT, access, op, 2571 expected_qual | EPT_VLT_LADDR_VLD | EPT_VLT_PADDR); 2572 } 2573 2574 /* 2575 * For translations that don't involve a GVA, that is physical address (paddr) 2576 * accesses, EPT violations don't set the flag EPT_VLT_PADDR. For a typical 2577 * guest memory access, the hardware does GVA -> GPA -> HPA. However, certain 2578 * translations don't involve GVAs, such as when the hardware does the guest 2579 * page table walk. For example, in translating GVA_1 -> GPA_1, the guest MMU 2580 * might try to set an A bit on a guest PTE. If the GPA_2 that the PTE resides 2581 * on isn't present in the EPT, then the EPT violation will be for GPA_2 and 2582 * the EPT_VLT_PADDR bit will be clear in the exit qualification. 2583 * 2584 * Note that paddr violations can also be triggered by loading PAE page tables 2585 * with wonky addresses. We don't test that yet. 2586 * 2587 * This function modifies the EPT entry that maps the GPA that the guest page 2588 * table entry mapping ept_access_test_data.gva resides on. 2589 * 2590 * @ept_access EPT permissions to set. Other permissions are cleared. 2591 * 2592 * @pte_ad Set the A/D bits on the guest PTE accordingly. 2593 * 2594 * @op Guest operation to perform with 2595 * ept_access_test_data.gva. 2596 * 2597 * @expect_violation 2598 * Is a violation expected during the paddr access? 2599 * 2600 * @expected_qual Expected qualification for the EPT violation. 2601 * EPT_VLT_PADDR should be clear. 2602 */ 2603 static void ept_access_paddr(unsigned long ept_access, unsigned long pte_ad, 2604 enum ept_access_op op, bool expect_violation, 2605 u64 expected_qual) 2606 { 2607 struct ept_access_test_data *data = &ept_access_test_data; 2608 unsigned long *ptep; 2609 unsigned long gpa; 2610 unsigned long orig_epte; 2611 unsigned long epte; 2612 int i; 2613 2614 /* Modify the guest PTE mapping data->gva according to @pte_ad. */ 2615 ptep = get_pte_level(current_page_table(), data->gva, /*level=*/1); 2616 TEST_ASSERT(ptep); 2617 TEST_ASSERT_EQ(*ptep & PT_ADDR_MASK, data->gpa); 2618 *ptep = (*ptep & ~PT_AD_MASK) | pte_ad; 2619 ept_access_test_guest_flush_tlb(); 2620 2621 /* 2622 * Now modify the access bits on the EPT entry for the GPA that the 2623 * guest PTE resides on. Note that by modifying a single EPT entry, 2624 * we're potentially affecting 512 guest PTEs. However, we've carefully 2625 * constructed our test such that those other 511 PTEs aren't used by 2626 * the guest: data->gva is at the beginning of a 1G huge page, thus the 2627 * PTE we're modifying is at the beginning of a 4K page and the 2628 * following 511 entires are also under our control (and not touched by 2629 * the guest). 2630 */ 2631 gpa = virt_to_phys(ptep); 2632 TEST_ASSERT_EQ(gpa & ~PAGE_MASK, 0); 2633 /* 2634 * Make sure the guest page table page is mapped with a 4K EPT entry, 2635 * otherwise our level=1 twiddling below will fail. We use the 2636 * identity map (gpa = gpa) since page tables are shared with the host. 2637 */ 2638 install_ept(pml4, gpa, gpa, EPT_PRESENT); 2639 orig_epte = ept_twiddle(gpa, /*mkhuge=*/0, /*level=*/1, 2640 /*clear=*/EPT_PRESENT, /*set=*/ept_access); 2641 2642 if (expect_violation) { 2643 do_ept_violation(/*leaf=*/true, op, 2644 expected_qual | EPT_VLT_LADDR_VLD, gpa); 2645 ept_untwiddle(gpa, /*level=*/1, orig_epte); 2646 do_ept_access_op(op); 2647 } else { 2648 do_ept_access_op(op); 2649 if (ept_ad_enabled()) { 2650 for (i = EPT_PAGE_LEVEL; i > 0; i--) { 2651 TEST_ASSERT(get_ept_pte(pml4, gpa, i, &epte)); 2652 TEST_ASSERT(epte & EPT_ACCESS_FLAG); 2653 if (i == 1) 2654 TEST_ASSERT(epte & EPT_DIRTY_FLAG); 2655 else 2656 TEST_ASSERT_EQ(epte & EPT_DIRTY_FLAG, 0); 2657 } 2658 } 2659 2660 ept_untwiddle(gpa, /*level=*/1, orig_epte); 2661 } 2662 2663 TEST_ASSERT(*ptep & PT_ACCESSED_MASK); 2664 if ((pte_ad & PT_DIRTY_MASK) || op == OP_WRITE) 2665 TEST_ASSERT(*ptep & PT_DIRTY_MASK); 2666 2667 skip_exit_vmcall(); 2668 } 2669 2670 static void ept_access_allowed_paddr(unsigned long ept_access, 2671 unsigned long pte_ad, 2672 enum ept_access_op op) 2673 { 2674 ept_access_paddr(ept_access, pte_ad, op, /*expect_violation=*/false, 2675 /*expected_qual=*/-1); 2676 } 2677 2678 static void ept_access_violation_paddr(unsigned long ept_access, 2679 unsigned long pte_ad, 2680 enum ept_access_op op, 2681 u64 expected_qual) 2682 { 2683 ept_access_paddr(ept_access, pte_ad, op, /*expect_violation=*/true, 2684 expected_qual); 2685 } 2686 2687 2688 static void ept_allowed_at_level_mkhuge(bool mkhuge, int level, 2689 unsigned long clear, 2690 unsigned long set, 2691 enum ept_access_op op) 2692 { 2693 struct ept_access_test_data *data = &ept_access_test_data; 2694 unsigned long orig_pte; 2695 2696 orig_pte = ept_twiddle(data->gpa, mkhuge, level, clear, set); 2697 2698 /* No violation. Should proceed to vmcall. */ 2699 do_ept_access_op(op); 2700 skip_exit_vmcall(); 2701 2702 ept_untwiddle(data->gpa, level, orig_pte); 2703 } 2704 2705 static void ept_allowed_at_level(int level, unsigned long clear, 2706 unsigned long set, enum ept_access_op op) 2707 { 2708 ept_allowed_at_level_mkhuge(false, level, clear, set, op); 2709 if (ept_huge_pages_supported(level)) 2710 ept_allowed_at_level_mkhuge(true, level, clear, set, op); 2711 } 2712 2713 static void ept_allowed(unsigned long clear, unsigned long set, 2714 enum ept_access_op op) 2715 { 2716 ept_allowed_at_level(1, clear, set, op); 2717 ept_allowed_at_level(2, clear, set, op); 2718 ept_allowed_at_level(3, clear, set, op); 2719 ept_allowed_at_level(4, clear, set, op); 2720 } 2721 2722 static void ept_ignored_bit(int bit) 2723 { 2724 /* Set the bit. */ 2725 ept_allowed(0, 1ul << bit, OP_READ); 2726 ept_allowed(0, 1ul << bit, OP_WRITE); 2727 ept_allowed(0, 1ul << bit, OP_EXEC); 2728 2729 /* Clear the bit. */ 2730 ept_allowed(1ul << bit, 0, OP_READ); 2731 ept_allowed(1ul << bit, 0, OP_WRITE); 2732 ept_allowed(1ul << bit, 0, OP_EXEC); 2733 } 2734 2735 static void ept_access_allowed(unsigned long access, enum ept_access_op op) 2736 { 2737 ept_allowed(EPT_PRESENT, access, op); 2738 } 2739 2740 2741 static void ept_misconfig_at_level_mkhuge_op(bool mkhuge, int level, 2742 unsigned long clear, 2743 unsigned long set, 2744 enum ept_access_op op) 2745 { 2746 struct ept_access_test_data *data = &ept_access_test_data; 2747 unsigned long orig_pte; 2748 2749 orig_pte = ept_twiddle(data->gpa, mkhuge, level, clear, set); 2750 2751 do_ept_access_op(op); 2752 assert_exit_reason(VMX_EPT_MISCONFIG); 2753 2754 /* Intel 27.2.1, "For all other VM exits, this field is cleared." */ 2755 #if 0 2756 /* broken: */ 2757 TEST_EXPECT_EQ_MSG(vmcs_read(EXI_QUALIFICATION), 0); 2758 #endif 2759 #if 0 2760 /* 2761 * broken: 2762 * According to description of exit qual for EPT violation, 2763 * EPT_VLT_LADDR_VLD indicates if GUEST_LINEAR_ADDRESS is valid. 2764 * However, I can't find anything that says GUEST_LINEAR_ADDRESS ought 2765 * to be set for msiconfig. 2766 */ 2767 TEST_EXPECT_EQ(vmcs_read(GUEST_LINEAR_ADDRESS), 2768 (unsigned long) ( 2769 op == OP_EXEC ? data->gva + 1 : data->gva)); 2770 #endif 2771 2772 /* Fix the violation and resume the op loop. */ 2773 ept_untwiddle(data->gpa, level, orig_pte); 2774 enter_guest(); 2775 skip_exit_vmcall(); 2776 } 2777 2778 static void ept_misconfig_at_level_mkhuge(bool mkhuge, int level, 2779 unsigned long clear, 2780 unsigned long set) 2781 { 2782 /* The op shouldn't matter (read, write, exec), so try them all! */ 2783 ept_misconfig_at_level_mkhuge_op(mkhuge, level, clear, set, OP_READ); 2784 ept_misconfig_at_level_mkhuge_op(mkhuge, level, clear, set, OP_WRITE); 2785 ept_misconfig_at_level_mkhuge_op(mkhuge, level, clear, set, OP_EXEC); 2786 } 2787 2788 static void ept_misconfig_at_level(int level, unsigned long clear, 2789 unsigned long set) 2790 { 2791 ept_misconfig_at_level_mkhuge(false, level, clear, set); 2792 if (ept_huge_pages_supported(level)) 2793 ept_misconfig_at_level_mkhuge(true, level, clear, set); 2794 } 2795 2796 static void ept_misconfig(unsigned long clear, unsigned long set) 2797 { 2798 ept_misconfig_at_level(1, clear, set); 2799 ept_misconfig_at_level(2, clear, set); 2800 ept_misconfig_at_level(3, clear, set); 2801 ept_misconfig_at_level(4, clear, set); 2802 } 2803 2804 static void ept_access_misconfig(unsigned long access) 2805 { 2806 ept_misconfig(EPT_PRESENT, access); 2807 } 2808 2809 static void ept_reserved_bit_at_level_nohuge(int level, int bit) 2810 { 2811 /* Setting the bit causes a misconfig. */ 2812 ept_misconfig_at_level_mkhuge(false, level, 0, 1ul << bit); 2813 2814 /* Making the entry non-present turns reserved bits into ignored. */ 2815 ept_violation_at_level(level, EPT_PRESENT, 1ul << bit, OP_READ, 2816 EPT_VLT_RD | EPT_VLT_LADDR_VLD | EPT_VLT_PADDR); 2817 } 2818 2819 static void ept_reserved_bit_at_level_huge(int level, int bit) 2820 { 2821 /* Setting the bit causes a misconfig. */ 2822 ept_misconfig_at_level_mkhuge(true, level, 0, 1ul << bit); 2823 2824 /* Making the entry non-present turns reserved bits into ignored. */ 2825 ept_violation_at_level(level, EPT_PRESENT, 1ul << bit, OP_READ, 2826 EPT_VLT_RD | EPT_VLT_LADDR_VLD | EPT_VLT_PADDR); 2827 } 2828 2829 static void ept_reserved_bit_at_level(int level, int bit) 2830 { 2831 /* Setting the bit causes a misconfig. */ 2832 ept_misconfig_at_level(level, 0, 1ul << bit); 2833 2834 /* Making the entry non-present turns reserved bits into ignored. */ 2835 ept_violation_at_level(level, EPT_PRESENT, 1ul << bit, OP_READ, 2836 EPT_VLT_RD | EPT_VLT_LADDR_VLD | EPT_VLT_PADDR); 2837 } 2838 2839 static void ept_reserved_bit(int bit) 2840 { 2841 ept_reserved_bit_at_level(1, bit); 2842 ept_reserved_bit_at_level(2, bit); 2843 ept_reserved_bit_at_level(3, bit); 2844 ept_reserved_bit_at_level(4, bit); 2845 } 2846 2847 #define PAGE_2M_ORDER 9 2848 #define PAGE_1G_ORDER 18 2849 2850 static void *get_1g_page(void) 2851 { 2852 static void *alloc; 2853 2854 if (!alloc) 2855 alloc = alloc_pages(PAGE_1G_ORDER); 2856 return alloc; 2857 } 2858 2859 static void ept_access_test_teardown(void *unused) 2860 { 2861 /* Exit the guest cleanly. */ 2862 do_ept_access_op(OP_EXIT); 2863 } 2864 2865 static void ept_access_test_guest(void) 2866 { 2867 struct ept_access_test_data *data = &ept_access_test_data; 2868 int (*code)(void) = (int (*)(void)) &data->gva[1]; 2869 2870 while (true) { 2871 switch (data->op) { 2872 case OP_READ: 2873 TEST_ASSERT_EQ(*data->gva, MAGIC_VAL_1); 2874 break; 2875 case OP_WRITE: 2876 *data->gva = MAGIC_VAL_2; 2877 TEST_ASSERT_EQ(*data->gva, MAGIC_VAL_2); 2878 *data->gva = MAGIC_VAL_1; 2879 break; 2880 case OP_EXEC: 2881 TEST_ASSERT_EQ(42, code()); 2882 break; 2883 case OP_FLUSH_TLB: 2884 write_cr3(read_cr3()); 2885 break; 2886 case OP_EXIT: 2887 return; 2888 default: 2889 TEST_ASSERT_MSG(false, "Unknown op %d", data->op); 2890 } 2891 vmcall(); 2892 } 2893 } 2894 2895 static void ept_access_test_setup(void) 2896 { 2897 struct ept_access_test_data *data = &ept_access_test_data; 2898 unsigned long npages = 1ul << PAGE_1G_ORDER; 2899 unsigned long size = npages * PAGE_SIZE; 2900 unsigned long *page_table = current_page_table(); 2901 unsigned long pte; 2902 2903 if (setup_ept(false)) 2904 test_skip("EPT not supported"); 2905 2906 /* We use data->gpa = 1 << 39 so that test data has a separate pml4 entry */ 2907 if (cpuid_maxphyaddr() < 40) 2908 test_skip("Test needs MAXPHYADDR >= 40"); 2909 2910 test_set_guest(ept_access_test_guest); 2911 test_add_teardown(ept_access_test_teardown, NULL); 2912 2913 data->hva = get_1g_page(); 2914 TEST_ASSERT(data->hva); 2915 data->hpa = virt_to_phys(data->hva); 2916 2917 data->gpa = 1ul << 39; 2918 data->gva = (void *) ALIGN((unsigned long) alloc_vpages(npages * 2), 2919 size); 2920 TEST_ASSERT(!any_present_pages(page_table, data->gva, size)); 2921 install_pages(page_table, data->gpa, size, data->gva); 2922 2923 /* 2924 * Make sure nothing's mapped here so the tests that screw with the 2925 * pml4 entry don't inadvertently break something. 2926 */ 2927 TEST_ASSERT(get_ept_pte(pml4, data->gpa, 4, &pte) && pte == 0); 2928 TEST_ASSERT(get_ept_pte(pml4, data->gpa + size - 1, 4, &pte) && pte == 0); 2929 install_ept(pml4, data->hpa, data->gpa, EPT_PRESENT); 2930 2931 data->hva[0] = MAGIC_VAL_1; 2932 memcpy(&data->hva[1], &ret42_start, &ret42_end - &ret42_start); 2933 } 2934 2935 static void ept_access_test_not_present(void) 2936 { 2937 ept_access_test_setup(); 2938 /* --- */ 2939 ept_access_violation(0, OP_READ, EPT_VLT_RD); 2940 ept_access_violation(0, OP_WRITE, EPT_VLT_WR); 2941 ept_access_violation(0, OP_EXEC, EPT_VLT_FETCH); 2942 } 2943 2944 static void ept_access_test_read_only(void) 2945 { 2946 ept_access_test_setup(); 2947 2948 /* r-- */ 2949 ept_access_allowed(EPT_RA, OP_READ); 2950 ept_access_violation(EPT_RA, OP_WRITE, EPT_VLT_WR | EPT_VLT_PERM_RD); 2951 ept_access_violation(EPT_RA, OP_EXEC, EPT_VLT_FETCH | EPT_VLT_PERM_RD); 2952 } 2953 2954 static void ept_access_test_write_only(void) 2955 { 2956 ept_access_test_setup(); 2957 /* -w- */ 2958 ept_access_misconfig(EPT_WA); 2959 } 2960 2961 static void ept_access_test_read_write(void) 2962 { 2963 ept_access_test_setup(); 2964 /* rw- */ 2965 ept_access_allowed(EPT_RA | EPT_WA, OP_READ); 2966 ept_access_allowed(EPT_RA | EPT_WA, OP_WRITE); 2967 ept_access_violation(EPT_RA | EPT_WA, OP_EXEC, 2968 EPT_VLT_FETCH | EPT_VLT_PERM_RD | EPT_VLT_PERM_WR); 2969 } 2970 2971 2972 static void ept_access_test_execute_only(void) 2973 { 2974 ept_access_test_setup(); 2975 /* --x */ 2976 if (ept_execute_only_supported()) { 2977 ept_access_violation(EPT_EA, OP_READ, 2978 EPT_VLT_RD | EPT_VLT_PERM_EX); 2979 ept_access_violation(EPT_EA, OP_WRITE, 2980 EPT_VLT_WR | EPT_VLT_PERM_EX); 2981 ept_access_allowed(EPT_EA, OP_EXEC); 2982 } else { 2983 ept_access_misconfig(EPT_EA); 2984 } 2985 } 2986 2987 static void ept_access_test_read_execute(void) 2988 { 2989 ept_access_test_setup(); 2990 /* r-x */ 2991 ept_access_allowed(EPT_RA | EPT_EA, OP_READ); 2992 ept_access_violation(EPT_RA | EPT_EA, OP_WRITE, 2993 EPT_VLT_WR | EPT_VLT_PERM_RD | EPT_VLT_PERM_EX); 2994 ept_access_allowed(EPT_RA | EPT_EA, OP_EXEC); 2995 } 2996 2997 static void ept_access_test_write_execute(void) 2998 { 2999 ept_access_test_setup(); 3000 /* -wx */ 3001 ept_access_misconfig(EPT_WA | EPT_EA); 3002 } 3003 3004 static void ept_access_test_read_write_execute(void) 3005 { 3006 ept_access_test_setup(); 3007 /* rwx */ 3008 ept_access_allowed(EPT_RA | EPT_WA | EPT_EA, OP_READ); 3009 ept_access_allowed(EPT_RA | EPT_WA | EPT_EA, OP_WRITE); 3010 ept_access_allowed(EPT_RA | EPT_WA | EPT_EA, OP_EXEC); 3011 } 3012 3013 static void ept_access_test_reserved_bits(void) 3014 { 3015 int i; 3016 int maxphyaddr; 3017 3018 ept_access_test_setup(); 3019 3020 /* Reserved bits above maxphyaddr. */ 3021 maxphyaddr = cpuid_maxphyaddr(); 3022 for (i = maxphyaddr; i <= 51; i++) { 3023 report_prefix_pushf("reserved_bit=%d", i); 3024 ept_reserved_bit(i); 3025 report_prefix_pop(); 3026 } 3027 3028 /* Level-specific reserved bits. */ 3029 ept_reserved_bit_at_level_nohuge(2, 3); 3030 ept_reserved_bit_at_level_nohuge(2, 4); 3031 ept_reserved_bit_at_level_nohuge(2, 5); 3032 ept_reserved_bit_at_level_nohuge(2, 6); 3033 /* 2M alignment. */ 3034 for (i = 12; i < 20; i++) { 3035 report_prefix_pushf("reserved_bit=%d", i); 3036 ept_reserved_bit_at_level_huge(2, i); 3037 report_prefix_pop(); 3038 } 3039 ept_reserved_bit_at_level_nohuge(3, 3); 3040 ept_reserved_bit_at_level_nohuge(3, 4); 3041 ept_reserved_bit_at_level_nohuge(3, 5); 3042 ept_reserved_bit_at_level_nohuge(3, 6); 3043 /* 1G alignment. */ 3044 for (i = 12; i < 29; i++) { 3045 report_prefix_pushf("reserved_bit=%d", i); 3046 ept_reserved_bit_at_level_huge(3, i); 3047 report_prefix_pop(); 3048 } 3049 ept_reserved_bit_at_level(4, 3); 3050 ept_reserved_bit_at_level(4, 4); 3051 ept_reserved_bit_at_level(4, 5); 3052 ept_reserved_bit_at_level(4, 6); 3053 ept_reserved_bit_at_level(4, 7); 3054 } 3055 3056 static void ept_access_test_ignored_bits(void) 3057 { 3058 ept_access_test_setup(); 3059 /* 3060 * Bits ignored at every level. Bits 8 and 9 (A and D) are ignored as 3061 * far as translation is concerned even if AD bits are enabled in the 3062 * EPTP. Bit 63 is ignored because "EPT-violation #VE" VM-execution 3063 * control is 0. 3064 */ 3065 ept_ignored_bit(8); 3066 ept_ignored_bit(9); 3067 ept_ignored_bit(10); 3068 ept_ignored_bit(11); 3069 ept_ignored_bit(52); 3070 ept_ignored_bit(53); 3071 ept_ignored_bit(54); 3072 ept_ignored_bit(55); 3073 ept_ignored_bit(56); 3074 ept_ignored_bit(57); 3075 ept_ignored_bit(58); 3076 ept_ignored_bit(59); 3077 ept_ignored_bit(60); 3078 ept_ignored_bit(61); 3079 ept_ignored_bit(62); 3080 ept_ignored_bit(63); 3081 } 3082 3083 static void ept_access_test_paddr_not_present_ad_disabled(void) 3084 { 3085 ept_access_test_setup(); 3086 ept_disable_ad_bits(); 3087 3088 ept_access_violation_paddr(0, PT_AD_MASK, OP_READ, EPT_VLT_RD); 3089 ept_access_violation_paddr(0, PT_AD_MASK, OP_WRITE, EPT_VLT_RD); 3090 ept_access_violation_paddr(0, PT_AD_MASK, OP_EXEC, EPT_VLT_RD); 3091 } 3092 3093 static void ept_access_test_paddr_not_present_ad_enabled(void) 3094 { 3095 u64 qual = EPT_VLT_RD | EPT_VLT_WR; 3096 3097 ept_access_test_setup(); 3098 ept_enable_ad_bits_or_skip_test(); 3099 3100 ept_access_violation_paddr(0, PT_AD_MASK, OP_READ, qual); 3101 ept_access_violation_paddr(0, PT_AD_MASK, OP_WRITE, qual); 3102 ept_access_violation_paddr(0, PT_AD_MASK, OP_EXEC, qual); 3103 } 3104 3105 static void ept_access_test_paddr_read_only_ad_disabled(void) 3106 { 3107 /* 3108 * When EPT AD bits are disabled, all accesses to guest paging 3109 * structures are reported separately as a read and (after 3110 * translation of the GPA to host physical address) a read+write 3111 * if the A/D bits have to be set. 3112 */ 3113 u64 qual = EPT_VLT_WR | EPT_VLT_RD | EPT_VLT_PERM_RD; 3114 3115 ept_access_test_setup(); 3116 ept_disable_ad_bits(); 3117 3118 /* Can't update A bit, so all accesses fail. */ 3119 ept_access_violation_paddr(EPT_RA, 0, OP_READ, qual); 3120 ept_access_violation_paddr(EPT_RA, 0, OP_WRITE, qual); 3121 ept_access_violation_paddr(EPT_RA, 0, OP_EXEC, qual); 3122 /* AD bits disabled, so only writes try to update the D bit. */ 3123 ept_access_allowed_paddr(EPT_RA, PT_ACCESSED_MASK, OP_READ); 3124 ept_access_violation_paddr(EPT_RA, PT_ACCESSED_MASK, OP_WRITE, qual); 3125 ept_access_allowed_paddr(EPT_RA, PT_ACCESSED_MASK, OP_EXEC); 3126 /* Both A and D already set, so read-only is OK. */ 3127 ept_access_allowed_paddr(EPT_RA, PT_AD_MASK, OP_READ); 3128 ept_access_allowed_paddr(EPT_RA, PT_AD_MASK, OP_WRITE); 3129 ept_access_allowed_paddr(EPT_RA, PT_AD_MASK, OP_EXEC); 3130 } 3131 3132 static void ept_access_test_paddr_read_only_ad_enabled(void) 3133 { 3134 /* 3135 * When EPT AD bits are enabled, all accesses to guest paging 3136 * structures are considered writes as far as EPT translation 3137 * is concerned. 3138 */ 3139 u64 qual = EPT_VLT_WR | EPT_VLT_RD | EPT_VLT_PERM_RD; 3140 3141 ept_access_test_setup(); 3142 ept_enable_ad_bits_or_skip_test(); 3143 3144 ept_access_violation_paddr(EPT_RA, 0, OP_READ, qual); 3145 ept_access_violation_paddr(EPT_RA, 0, OP_WRITE, qual); 3146 ept_access_violation_paddr(EPT_RA, 0, OP_EXEC, qual); 3147 ept_access_violation_paddr(EPT_RA, PT_ACCESSED_MASK, OP_READ, qual); 3148 ept_access_violation_paddr(EPT_RA, PT_ACCESSED_MASK, OP_WRITE, qual); 3149 ept_access_violation_paddr(EPT_RA, PT_ACCESSED_MASK, OP_EXEC, qual); 3150 ept_access_violation_paddr(EPT_RA, PT_AD_MASK, OP_READ, qual); 3151 ept_access_violation_paddr(EPT_RA, PT_AD_MASK, OP_WRITE, qual); 3152 ept_access_violation_paddr(EPT_RA, PT_AD_MASK, OP_EXEC, qual); 3153 } 3154 3155 static void ept_access_test_paddr_read_write(void) 3156 { 3157 ept_access_test_setup(); 3158 /* Read-write access to paging structure. */ 3159 ept_access_allowed_paddr(EPT_RA | EPT_WA, 0, OP_READ); 3160 ept_access_allowed_paddr(EPT_RA | EPT_WA, 0, OP_WRITE); 3161 ept_access_allowed_paddr(EPT_RA | EPT_WA, 0, OP_EXEC); 3162 } 3163 3164 static void ept_access_test_paddr_read_write_execute(void) 3165 { 3166 ept_access_test_setup(); 3167 /* RWX access to paging structure. */ 3168 ept_access_allowed_paddr(EPT_PRESENT, 0, OP_READ); 3169 ept_access_allowed_paddr(EPT_PRESENT, 0, OP_WRITE); 3170 ept_access_allowed_paddr(EPT_PRESENT, 0, OP_EXEC); 3171 } 3172 3173 static void ept_access_test_paddr_read_execute_ad_disabled(void) 3174 { 3175 /* 3176 * When EPT AD bits are disabled, all accesses to guest paging 3177 * structures are reported separately as a read and (after 3178 * translation of the GPA to host physical address) a read+write 3179 * if the A/D bits have to be set. 3180 */ 3181 u64 qual = EPT_VLT_WR | EPT_VLT_RD | EPT_VLT_PERM_RD | EPT_VLT_PERM_EX; 3182 3183 ept_access_test_setup(); 3184 ept_disable_ad_bits(); 3185 3186 /* Can't update A bit, so all accesses fail. */ 3187 ept_access_violation_paddr(EPT_RA | EPT_EA, 0, OP_READ, qual); 3188 ept_access_violation_paddr(EPT_RA | EPT_EA, 0, OP_WRITE, qual); 3189 ept_access_violation_paddr(EPT_RA | EPT_EA, 0, OP_EXEC, qual); 3190 /* AD bits disabled, so only writes try to update the D bit. */ 3191 ept_access_allowed_paddr(EPT_RA | EPT_EA, PT_ACCESSED_MASK, OP_READ); 3192 ept_access_violation_paddr(EPT_RA | EPT_EA, PT_ACCESSED_MASK, OP_WRITE, qual); 3193 ept_access_allowed_paddr(EPT_RA | EPT_EA, PT_ACCESSED_MASK, OP_EXEC); 3194 /* Both A and D already set, so read-only is OK. */ 3195 ept_access_allowed_paddr(EPT_RA | EPT_EA, PT_AD_MASK, OP_READ); 3196 ept_access_allowed_paddr(EPT_RA | EPT_EA, PT_AD_MASK, OP_WRITE); 3197 ept_access_allowed_paddr(EPT_RA | EPT_EA, PT_AD_MASK, OP_EXEC); 3198 } 3199 3200 static void ept_access_test_paddr_read_execute_ad_enabled(void) 3201 { 3202 /* 3203 * When EPT AD bits are enabled, all accesses to guest paging 3204 * structures are considered writes as far as EPT translation 3205 * is concerned. 3206 */ 3207 u64 qual = EPT_VLT_WR | EPT_VLT_RD | EPT_VLT_PERM_RD | EPT_VLT_PERM_EX; 3208 3209 ept_access_test_setup(); 3210 ept_enable_ad_bits_or_skip_test(); 3211 3212 ept_access_violation_paddr(EPT_RA | EPT_EA, 0, OP_READ, qual); 3213 ept_access_violation_paddr(EPT_RA | EPT_EA, 0, OP_WRITE, qual); 3214 ept_access_violation_paddr(EPT_RA | EPT_EA, 0, OP_EXEC, qual); 3215 ept_access_violation_paddr(EPT_RA | EPT_EA, PT_ACCESSED_MASK, OP_READ, qual); 3216 ept_access_violation_paddr(EPT_RA | EPT_EA, PT_ACCESSED_MASK, OP_WRITE, qual); 3217 ept_access_violation_paddr(EPT_RA | EPT_EA, PT_ACCESSED_MASK, OP_EXEC, qual); 3218 ept_access_violation_paddr(EPT_RA | EPT_EA, PT_AD_MASK, OP_READ, qual); 3219 ept_access_violation_paddr(EPT_RA | EPT_EA, PT_AD_MASK, OP_WRITE, qual); 3220 ept_access_violation_paddr(EPT_RA | EPT_EA, PT_AD_MASK, OP_EXEC, qual); 3221 } 3222 3223 static void ept_access_test_paddr_not_present_page_fault(void) 3224 { 3225 ept_access_test_setup(); 3226 /* 3227 * TODO: test no EPT violation as long as guest PF occurs. e.g., GPA is 3228 * page is read-only in EPT but GVA is also mapped read only in PT. 3229 * Thus guest page fault before host takes EPT violation for trying to 3230 * update A bit. 3231 */ 3232 } 3233 3234 static void ept_access_test_force_2m_page(void) 3235 { 3236 ept_access_test_setup(); 3237 3238 TEST_ASSERT_EQ(ept_2m_supported(), true); 3239 ept_allowed_at_level_mkhuge(true, 2, 0, 0, OP_READ); 3240 ept_violation_at_level_mkhuge(true, 2, EPT_PRESENT, EPT_RA, OP_WRITE, 3241 EPT_VLT_WR | EPT_VLT_PERM_RD | 3242 EPT_VLT_LADDR_VLD | EPT_VLT_PADDR); 3243 ept_misconfig_at_level_mkhuge(true, 2, EPT_PRESENT, EPT_WA); 3244 } 3245 3246 static bool invvpid_valid(u64 type, u64 vpid, u64 gla) 3247 { 3248 u64 msr = rdmsr(MSR_IA32_VMX_EPT_VPID_CAP); 3249 3250 TEST_ASSERT(msr & VPID_CAP_INVVPID); 3251 3252 if (type < INVVPID_ADDR || type > INVVPID_CONTEXT_LOCAL) 3253 return false; 3254 3255 if (!(msr & (1ull << (type + VPID_CAP_INVVPID_TYPES_SHIFT)))) 3256 return false; 3257 3258 if (vpid >> 16) 3259 return false; 3260 3261 if (type != INVVPID_ALL && !vpid) 3262 return false; 3263 3264 if (type == INVVPID_ADDR && !is_canonical(gla)) 3265 return false; 3266 3267 return true; 3268 } 3269 3270 static void try_invvpid(u64 type, u64 vpid, u64 gla) 3271 { 3272 int rc; 3273 bool valid = invvpid_valid(type, vpid, gla); 3274 u64 expected = valid ? VMXERR_UNSUPPORTED_VMCS_COMPONENT 3275 : VMXERR_INVALID_OPERAND_TO_INVEPT_INVVPID; 3276 /* 3277 * Set VMX_INST_ERROR to VMXERR_UNVALID_VMCS_COMPONENT, so 3278 * that we can tell if it is updated by INVVPID. 3279 */ 3280 vmcs_read(~0); 3281 rc = invvpid(type, vpid, gla); 3282 report(!rc == valid, "INVVPID type %ld VPID %lx GLA %lx %s", type, 3283 vpid, gla, 3284 valid ? "passes" : "fails"); 3285 report(vmcs_read(VMX_INST_ERROR) == expected, 3286 "After %s INVVPID, VMX_INST_ERR is %ld (actual %ld)", 3287 rc ? "failed" : "successful", 3288 expected, vmcs_read(VMX_INST_ERROR)); 3289 } 3290 3291 static void ds_invvpid(void *data) 3292 { 3293 u64 msr = rdmsr(MSR_IA32_VMX_EPT_VPID_CAP); 3294 u64 type = ffs(msr >> VPID_CAP_INVVPID_TYPES_SHIFT) - 1; 3295 3296 TEST_ASSERT(type >= INVVPID_ADDR && type <= INVVPID_CONTEXT_LOCAL); 3297 asm volatile("invvpid %0, %1" 3298 : 3299 : "m"(*(struct invvpid_operand *)data), 3300 "r"(type)); 3301 } 3302 3303 /* 3304 * The SS override is ignored in 64-bit mode, so we use an addressing 3305 * mode with %rsp as the base register to generate an implicit SS 3306 * reference. 3307 */ 3308 static void ss_invvpid(void *data) 3309 { 3310 u64 msr = rdmsr(MSR_IA32_VMX_EPT_VPID_CAP); 3311 u64 type = ffs(msr >> VPID_CAP_INVVPID_TYPES_SHIFT) - 1; 3312 3313 TEST_ASSERT(type >= INVVPID_ADDR && type <= INVVPID_CONTEXT_LOCAL); 3314 asm volatile("sub %%rsp,%0; invvpid (%%rsp,%0,1), %1" 3315 : "+r"(data) 3316 : "r"(type)); 3317 } 3318 3319 static void invvpid_test_gp(void) 3320 { 3321 bool fault; 3322 3323 fault = test_for_exception(GP_VECTOR, &ds_invvpid, 3324 (void *)NONCANONICAL); 3325 report(fault, "INVVPID with non-canonical DS operand raises #GP"); 3326 } 3327 3328 static void invvpid_test_ss(void) 3329 { 3330 bool fault; 3331 3332 fault = test_for_exception(SS_VECTOR, &ss_invvpid, 3333 (void *)NONCANONICAL); 3334 report(fault, "INVVPID with non-canonical SS operand raises #SS"); 3335 } 3336 3337 static void invvpid_test_pf(void) 3338 { 3339 void *vpage = alloc_vpage(); 3340 bool fault; 3341 3342 fault = test_for_exception(PF_VECTOR, &ds_invvpid, vpage); 3343 report(fault, "INVVPID with unmapped operand raises #PF"); 3344 } 3345 3346 static void try_compat_invvpid(void *unused) 3347 { 3348 struct far_pointer32 fp = { 3349 .offset = (uintptr_t)&&invvpid, 3350 .selector = KERNEL_CS32, 3351 }; 3352 register uintptr_t rsp asm("rsp"); 3353 3354 TEST_ASSERT_MSG(fp.offset == (uintptr_t)&&invvpid, 3355 "Code address too high."); 3356 TEST_ASSERT_MSG(rsp == (u32)rsp, "Stack address too high."); 3357 3358 asm goto ("lcall *%0" : : "m" (fp) : "rax" : invvpid); 3359 return; 3360 invvpid: 3361 asm volatile (".code32;" 3362 "invvpid (%eax), %eax;" 3363 "lret;" 3364 ".code64"); 3365 __builtin_unreachable(); 3366 } 3367 3368 static void invvpid_test_compatibility_mode(void) 3369 { 3370 bool fault; 3371 3372 fault = test_for_exception(UD_VECTOR, &try_compat_invvpid, NULL); 3373 report(fault, "Compatibility mode INVVPID raises #UD"); 3374 } 3375 3376 static void invvpid_test_not_in_vmx_operation(void) 3377 { 3378 bool fault; 3379 3380 TEST_ASSERT(!vmx_off()); 3381 fault = test_for_exception(UD_VECTOR, &ds_invvpid, NULL); 3382 report(fault, "INVVPID outside of VMX operation raises #UD"); 3383 TEST_ASSERT(!vmx_on()); 3384 } 3385 3386 /* 3387 * This does not test real-address mode, virtual-8086 mode, protected mode, 3388 * or CPL > 0. 3389 */ 3390 static void invvpid_test_v2(void) 3391 { 3392 u64 msr; 3393 int i; 3394 unsigned types = 0; 3395 unsigned type; 3396 3397 if (!(ctrl_cpu_rev[0].clr & CPU_SECONDARY) || 3398 !(ctrl_cpu_rev[1].clr & CPU_VPID)) 3399 test_skip("VPID not supported"); 3400 3401 msr = rdmsr(MSR_IA32_VMX_EPT_VPID_CAP); 3402 3403 if (!(msr & VPID_CAP_INVVPID)) 3404 test_skip("INVVPID not supported.\n"); 3405 3406 if (msr & VPID_CAP_INVVPID_ADDR) 3407 types |= 1u << INVVPID_ADDR; 3408 if (msr & VPID_CAP_INVVPID_CXTGLB) 3409 types |= 1u << INVVPID_CONTEXT_GLOBAL; 3410 if (msr & VPID_CAP_INVVPID_ALL) 3411 types |= 1u << INVVPID_ALL; 3412 if (msr & VPID_CAP_INVVPID_CXTLOC) 3413 types |= 1u << INVVPID_CONTEXT_LOCAL; 3414 3415 if (!types) 3416 test_skip("No INVVPID types supported.\n"); 3417 3418 for (i = -127; i < 128; i++) 3419 try_invvpid(i, 0xffff, 0); 3420 3421 /* 3422 * VPID must not be more than 16 bits. 3423 */ 3424 for (i = 0; i < 64; i++) 3425 for (type = 0; type < 4; type++) 3426 if (types & (1u << type)) 3427 try_invvpid(type, 1ul << i, 0); 3428 3429 /* 3430 * VPID must not be zero, except for "all contexts." 3431 */ 3432 for (type = 0; type < 4; type++) 3433 if (types & (1u << type)) 3434 try_invvpid(type, 0, 0); 3435 3436 /* 3437 * The gla operand is only validated for single-address INVVPID. 3438 */ 3439 if (types & (1u << INVVPID_ADDR)) 3440 try_invvpid(INVVPID_ADDR, 0xffff, NONCANONICAL); 3441 3442 invvpid_test_gp(); 3443 invvpid_test_ss(); 3444 invvpid_test_pf(); 3445 invvpid_test_compatibility_mode(); 3446 invvpid_test_not_in_vmx_operation(); 3447 } 3448 3449 /* 3450 * Test for early VMLAUNCH failure. Returns true if VMLAUNCH makes it 3451 * at least as far as the guest-state checks. Returns false if the 3452 * VMLAUNCH fails early and execution falls through to the next 3453 * instruction. 3454 */ 3455 static bool vmlaunch_succeeds(void) 3456 { 3457 u32 exit_reason; 3458 3459 /* 3460 * Indirectly set VMX_INST_ERR to 12 ("VMREAD/VMWRITE from/to 3461 * unsupported VMCS component"). The caller can then check 3462 * to see if a failed VM-entry sets VMX_INST_ERR as expected. 3463 */ 3464 vmcs_write(~0u, 0); 3465 3466 vmcs_write(HOST_RIP, (uintptr_t)&&success); 3467 __asm__ __volatile__ goto ("vmwrite %%rsp, %0; vmlaunch" 3468 : 3469 : "r" ((u64)HOST_RSP) 3470 : "cc", "memory" 3471 : success); 3472 return false; 3473 success: 3474 exit_reason = vmcs_read(EXI_REASON); 3475 TEST_ASSERT(exit_reason == (VMX_FAIL_STATE | VMX_ENTRY_FAILURE) || 3476 exit_reason == (VMX_FAIL_MSR | VMX_ENTRY_FAILURE)); 3477 return true; 3478 } 3479 3480 /* 3481 * Try to launch the current VMCS. 3482 */ 3483 static void test_vmx_vmlaunch(u32 xerror) 3484 { 3485 bool success = vmlaunch_succeeds(); 3486 u32 vmx_inst_err; 3487 3488 report(success == !xerror, "vmlaunch %s", 3489 !xerror ? "succeeds" : "fails"); 3490 if (!success && xerror) { 3491 vmx_inst_err = vmcs_read(VMX_INST_ERROR); 3492 report(vmx_inst_err == xerror, 3493 "VMX inst error is %d (actual %d)", xerror, 3494 vmx_inst_err); 3495 } 3496 } 3497 3498 /* 3499 * Try to launch the current VMCS, and expect one of two possible 3500 * errors (or success) codes. 3501 */ 3502 static void test_vmx_vmlaunch2(u32 xerror1, u32 xerror2) 3503 { 3504 bool success = vmlaunch_succeeds(); 3505 u32 vmx_inst_err; 3506 3507 if (!xerror1 == !xerror2) 3508 report(success == !xerror1, "vmlaunch %s", 3509 !xerror1 ? "succeeds" : "fails"); 3510 3511 if (!success && (xerror1 || xerror2)) { 3512 vmx_inst_err = vmcs_read(VMX_INST_ERROR); 3513 report(vmx_inst_err == xerror1 || vmx_inst_err == xerror2, 3514 "VMX inst error is %d or %d (actual %d)", xerror1, 3515 xerror2, vmx_inst_err); 3516 } 3517 } 3518 3519 static void test_vmx_invalid_controls(void) 3520 { 3521 test_vmx_vmlaunch(VMXERR_ENTRY_INVALID_CONTROL_FIELD); 3522 } 3523 3524 static void test_vmx_valid_controls(void) 3525 { 3526 test_vmx_vmlaunch(0); 3527 } 3528 3529 /* 3530 * Test a particular value of a VM-execution control bit, if the value 3531 * is required or if the value is zero. 3532 */ 3533 static void test_rsvd_ctl_bit_value(const char *name, union vmx_ctrl_msr msr, 3534 enum Encoding encoding, unsigned bit, 3535 unsigned val) 3536 { 3537 u32 mask = 1u << bit; 3538 bool expected; 3539 u32 controls; 3540 3541 if (msr.set & mask) 3542 TEST_ASSERT(msr.clr & mask); 3543 3544 /* 3545 * We can't arbitrarily turn on a control bit, because it may 3546 * introduce dependencies on other VMCS fields. So, we only 3547 * test turning on bits that have a required setting. 3548 */ 3549 if (val && (msr.clr & mask) && !(msr.set & mask)) 3550 return; 3551 3552 report_prefix_pushf("%s %s bit %d", 3553 val ? "Set" : "Clear", name, bit); 3554 3555 controls = vmcs_read(encoding); 3556 if (val) { 3557 vmcs_write(encoding, msr.set | mask); 3558 expected = (msr.clr & mask); 3559 } else { 3560 vmcs_write(encoding, msr.set & ~mask); 3561 expected = !(msr.set & mask); 3562 } 3563 if (expected) 3564 test_vmx_valid_controls(); 3565 else 3566 test_vmx_invalid_controls(); 3567 vmcs_write(encoding, controls); 3568 report_prefix_pop(); 3569 } 3570 3571 /* 3572 * Test reserved values of a VM-execution control bit, based on the 3573 * allowed bit settings from the corresponding VMX capability MSR. 3574 */ 3575 static void test_rsvd_ctl_bit(const char *name, union vmx_ctrl_msr msr, 3576 enum Encoding encoding, unsigned bit) 3577 { 3578 test_rsvd_ctl_bit_value(name, msr, encoding, bit, 0); 3579 test_rsvd_ctl_bit_value(name, msr, encoding, bit, 1); 3580 } 3581 3582 /* 3583 * Reserved bits in the pin-based VM-execution controls must be set 3584 * properly. Software may consult the VMX capability MSRs to determine 3585 * the proper settings. 3586 * [Intel SDM] 3587 */ 3588 static void test_pin_based_ctls(void) 3589 { 3590 unsigned bit; 3591 3592 printf("%s: %lx\n", basic.ctrl ? "MSR_IA32_VMX_TRUE_PIN" : 3593 "MSR_IA32_VMX_PINBASED_CTLS", ctrl_pin_rev.val); 3594 for (bit = 0; bit < 32; bit++) 3595 test_rsvd_ctl_bit("pin-based controls", 3596 ctrl_pin_rev, PIN_CONTROLS, bit); 3597 } 3598 3599 /* 3600 * Reserved bits in the primary processor-based VM-execution controls 3601 * must be set properly. Software may consult the VMX capability MSRs 3602 * to determine the proper settings. 3603 * [Intel SDM] 3604 */ 3605 static void test_primary_processor_based_ctls(void) 3606 { 3607 unsigned bit; 3608 3609 printf("\n%s: %lx\n", basic.ctrl ? "MSR_IA32_VMX_TRUE_PROC" : 3610 "MSR_IA32_VMX_PROCBASED_CTLS", ctrl_cpu_rev[0].val); 3611 for (bit = 0; bit < 32; bit++) 3612 test_rsvd_ctl_bit("primary processor-based controls", 3613 ctrl_cpu_rev[0], CPU_EXEC_CTRL0, bit); 3614 } 3615 3616 /* 3617 * If the "activate secondary controls" primary processor-based 3618 * VM-execution control is 1, reserved bits in the secondary 3619 * processor-based VM-execution controls must be cleared. Software may 3620 * consult the VMX capability MSRs to determine which bits are 3621 * reserved. 3622 * If the "activate secondary controls" primary processor-based 3623 * VM-execution control is 0 (or if the processor does not support the 3624 * 1-setting of that control), no checks are performed on the 3625 * secondary processor-based VM-execution controls. 3626 * [Intel SDM] 3627 */ 3628 static void test_secondary_processor_based_ctls(void) 3629 { 3630 u32 primary; 3631 u32 secondary; 3632 unsigned bit; 3633 3634 if (!(ctrl_cpu_rev[0].clr & CPU_SECONDARY)) 3635 return; 3636 3637 primary = vmcs_read(CPU_EXEC_CTRL0); 3638 secondary = vmcs_read(CPU_EXEC_CTRL1); 3639 3640 vmcs_write(CPU_EXEC_CTRL0, primary | CPU_SECONDARY); 3641 printf("\nMSR_IA32_VMX_PROCBASED_CTLS2: %lx\n", ctrl_cpu_rev[1].val); 3642 for (bit = 0; bit < 32; bit++) 3643 test_rsvd_ctl_bit("secondary processor-based controls", 3644 ctrl_cpu_rev[1], CPU_EXEC_CTRL1, bit); 3645 3646 /* 3647 * When the "activate secondary controls" VM-execution control 3648 * is clear, there are no checks on the secondary controls. 3649 */ 3650 vmcs_write(CPU_EXEC_CTRL0, primary & ~CPU_SECONDARY); 3651 vmcs_write(CPU_EXEC_CTRL1, ~0); 3652 report(vmlaunch_succeeds(), 3653 "Secondary processor-based controls ignored"); 3654 vmcs_write(CPU_EXEC_CTRL1, secondary); 3655 vmcs_write(CPU_EXEC_CTRL0, primary); 3656 } 3657 3658 static void try_cr3_target_count(unsigned i, unsigned max) 3659 { 3660 report_prefix_pushf("CR3 target count 0x%x", i); 3661 vmcs_write(CR3_TARGET_COUNT, i); 3662 if (i <= max) 3663 test_vmx_valid_controls(); 3664 else 3665 test_vmx_invalid_controls(); 3666 report_prefix_pop(); 3667 } 3668 3669 /* 3670 * The CR3-target count must not be greater than 4. Future processors 3671 * may support a different number of CR3-target values. Software 3672 * should read the VMX capability MSR IA32_VMX_MISC to determine the 3673 * number of values supported. 3674 * [Intel SDM] 3675 */ 3676 static void test_cr3_targets(void) 3677 { 3678 unsigned supported_targets = (rdmsr(MSR_IA32_VMX_MISC) >> 16) & 0x1ff; 3679 u32 cr3_targets = vmcs_read(CR3_TARGET_COUNT); 3680 unsigned i; 3681 3682 printf("\nSupported CR3 targets: %d\n", supported_targets); 3683 TEST_ASSERT(supported_targets <= 256); 3684 3685 try_cr3_target_count(-1u, supported_targets); 3686 try_cr3_target_count(0x80000000, supported_targets); 3687 try_cr3_target_count(0x7fffffff, supported_targets); 3688 for (i = 0; i <= supported_targets + 1; i++) 3689 try_cr3_target_count(i, supported_targets); 3690 vmcs_write(CR3_TARGET_COUNT, cr3_targets); 3691 3692 /* VMWRITE to nonexistent target fields should fail. */ 3693 for (i = supported_targets; i < 256; i++) 3694 TEST_ASSERT(vmcs_write(CR3_TARGET_0 + i*2, 0)); 3695 } 3696 3697 /* 3698 * Test a particular address setting in the VMCS 3699 */ 3700 static void test_vmcs_addr(const char *name, 3701 enum Encoding encoding, 3702 u64 align, 3703 bool ignored, 3704 bool skip_beyond_mapped_ram, 3705 u64 addr) 3706 { 3707 report_prefix_pushf("%s = %lx", name, addr); 3708 vmcs_write(encoding, addr); 3709 if (skip_beyond_mapped_ram && 3710 addr > fwcfg_get_u64(FW_CFG_RAM_SIZE) - align && 3711 addr < (1ul << cpuid_maxphyaddr())) 3712 printf("Skipping physical address beyond mapped RAM\n"); 3713 else if (ignored || (IS_ALIGNED(addr, align) && 3714 addr < (1ul << cpuid_maxphyaddr()))) 3715 test_vmx_valid_controls(); 3716 else 3717 test_vmx_invalid_controls(); 3718 report_prefix_pop(); 3719 } 3720 3721 /* 3722 * Test interesting values for a VMCS address 3723 */ 3724 static void test_vmcs_addr_values(const char *name, 3725 enum Encoding encoding, 3726 u64 align, 3727 bool ignored, 3728 bool skip_beyond_mapped_ram, 3729 u32 bit_start, u32 bit_end) 3730 { 3731 unsigned i; 3732 u64 orig_val = vmcs_read(encoding); 3733 3734 for (i = bit_start; i <= bit_end; i++) 3735 test_vmcs_addr(name, encoding, align, ignored, 3736 skip_beyond_mapped_ram, 1ul << i); 3737 3738 test_vmcs_addr(name, encoding, align, ignored, 3739 skip_beyond_mapped_ram, PAGE_SIZE - 1); 3740 test_vmcs_addr(name, encoding, align, ignored, 3741 skip_beyond_mapped_ram, PAGE_SIZE); 3742 test_vmcs_addr(name, encoding, align, ignored, 3743 skip_beyond_mapped_ram, 3744 (1ul << cpuid_maxphyaddr()) - PAGE_SIZE); 3745 test_vmcs_addr(name, encoding, align, ignored, 3746 skip_beyond_mapped_ram, -1ul); 3747 3748 vmcs_write(encoding, orig_val); 3749 } 3750 3751 /* 3752 * Test a physical address reference in the VMCS, when the corresponding 3753 * feature is enabled and when the corresponding feature is disabled. 3754 */ 3755 static void test_vmcs_addr_reference(u32 control_bit, enum Encoding field, 3756 const char *field_name, 3757 const char *control_name, u64 align, 3758 bool skip_beyond_mapped_ram, 3759 bool control_primary) 3760 { 3761 u32 primary = vmcs_read(CPU_EXEC_CTRL0); 3762 u32 secondary = vmcs_read(CPU_EXEC_CTRL1); 3763 u64 page_addr; 3764 3765 if (control_primary) { 3766 if (!(ctrl_cpu_rev[0].clr & control_bit)) 3767 return; 3768 } else { 3769 if (!(ctrl_cpu_rev[1].clr & control_bit)) 3770 return; 3771 } 3772 3773 page_addr = vmcs_read(field); 3774 3775 report_prefix_pushf("%s enabled", control_name); 3776 if (control_primary) { 3777 vmcs_write(CPU_EXEC_CTRL0, primary | control_bit); 3778 } else { 3779 vmcs_write(CPU_EXEC_CTRL0, primary | CPU_SECONDARY); 3780 vmcs_write(CPU_EXEC_CTRL1, secondary | control_bit); 3781 } 3782 3783 test_vmcs_addr_values(field_name, field, align, false, 3784 skip_beyond_mapped_ram, 0, 63); 3785 report_prefix_pop(); 3786 3787 report_prefix_pushf("%s disabled", control_name); 3788 if (control_primary) { 3789 vmcs_write(CPU_EXEC_CTRL0, primary & ~control_bit); 3790 } else { 3791 vmcs_write(CPU_EXEC_CTRL0, primary & ~CPU_SECONDARY); 3792 vmcs_write(CPU_EXEC_CTRL1, secondary & ~control_bit); 3793 } 3794 3795 test_vmcs_addr_values(field_name, field, align, true, false, 0, 63); 3796 report_prefix_pop(); 3797 3798 vmcs_write(field, page_addr); 3799 vmcs_write(CPU_EXEC_CTRL0, primary); 3800 vmcs_write(CPU_EXEC_CTRL1, secondary); 3801 } 3802 3803 /* 3804 * If the "use I/O bitmaps" VM-execution control is 1, bits 11:0 of 3805 * each I/O-bitmap address must be 0. Neither address should set any 3806 * bits beyond the processor's physical-address width. 3807 * [Intel SDM] 3808 */ 3809 static void test_io_bitmaps(void) 3810 { 3811 test_vmcs_addr_reference(CPU_IO_BITMAP, IO_BITMAP_A, 3812 "I/O bitmap A", "Use I/O bitmaps", 3813 PAGE_SIZE, false, true); 3814 test_vmcs_addr_reference(CPU_IO_BITMAP, IO_BITMAP_B, 3815 "I/O bitmap B", "Use I/O bitmaps", 3816 PAGE_SIZE, false, true); 3817 } 3818 3819 /* 3820 * If the "use MSR bitmaps" VM-execution control is 1, bits 11:0 of 3821 * the MSR-bitmap address must be 0. The address should not set any 3822 * bits beyond the processor's physical-address width. 3823 * [Intel SDM] 3824 */ 3825 static void test_msr_bitmap(void) 3826 { 3827 test_vmcs_addr_reference(CPU_MSR_BITMAP, MSR_BITMAP, 3828 "MSR bitmap", "Use MSR bitmaps", 3829 PAGE_SIZE, false, true); 3830 } 3831 3832 /* 3833 * If the "use TPR shadow" VM-execution control is 1, the virtual-APIC 3834 * address must satisfy the following checks: 3835 * - Bits 11:0 of the address must be 0. 3836 * - The address should not set any bits beyond the processor's 3837 * physical-address width. 3838 * [Intel SDM] 3839 */ 3840 static void test_apic_virt_addr(void) 3841 { 3842 /* 3843 * Ensure the processor will never use the virtual-APIC page, since 3844 * we will point it to invalid RAM. Otherwise KVM is puzzled about 3845 * what we're trying to achieve and fails vmentry. 3846 */ 3847 u32 cpu_ctrls0 = vmcs_read(CPU_EXEC_CTRL0); 3848 vmcs_write(CPU_EXEC_CTRL0, cpu_ctrls0 | CPU_CR8_LOAD | CPU_CR8_STORE); 3849 test_vmcs_addr_reference(CPU_TPR_SHADOW, APIC_VIRT_ADDR, 3850 "virtual-APIC address", "Use TPR shadow", 3851 PAGE_SIZE, false, true); 3852 vmcs_write(CPU_EXEC_CTRL0, cpu_ctrls0); 3853 } 3854 3855 /* 3856 * If the "virtualize APIC-accesses" VM-execution control is 1, the 3857 * APIC-access address must satisfy the following checks: 3858 * - Bits 11:0 of the address must be 0. 3859 * - The address should not set any bits beyond the processor's 3860 * physical-address width. 3861 * [Intel SDM] 3862 */ 3863 static void test_apic_access_addr(void) 3864 { 3865 void *apic_access_page = alloc_page(); 3866 3867 vmcs_write(APIC_ACCS_ADDR, virt_to_phys(apic_access_page)); 3868 3869 test_vmcs_addr_reference(CPU_VIRT_APIC_ACCESSES, APIC_ACCS_ADDR, 3870 "APIC-access address", 3871 "virtualize APIC-accesses", PAGE_SIZE, 3872 true, false); 3873 } 3874 3875 static bool set_bit_pattern(u8 mask, u32 *secondary) 3876 { 3877 u8 i; 3878 bool flag = false; 3879 u32 test_bits[3] = { 3880 CPU_VIRT_X2APIC, 3881 CPU_APIC_REG_VIRT, 3882 CPU_VINTD 3883 }; 3884 3885 for (i = 0; i < ARRAY_SIZE(test_bits); i++) { 3886 if ((mask & (1u << i)) && 3887 (ctrl_cpu_rev[1].clr & test_bits[i])) { 3888 *secondary |= test_bits[i]; 3889 flag = true; 3890 } 3891 } 3892 3893 return (flag); 3894 } 3895 3896 /* 3897 * If the "use TPR shadow" VM-execution control is 0, the following 3898 * VM-execution controls must also be 0: 3899 * - virtualize x2APIC mode 3900 * - APIC-register virtualization 3901 * - virtual-interrupt delivery 3902 * [Intel SDM] 3903 * 3904 * 2. If the "virtualize x2APIC mode" VM-execution control is 1, the 3905 * "virtualize APIC accesses" VM-execution control must be 0. 3906 * [Intel SDM] 3907 */ 3908 static void test_apic_virtual_ctls(void) 3909 { 3910 u32 saved_primary = vmcs_read(CPU_EXEC_CTRL0); 3911 u32 saved_secondary = vmcs_read(CPU_EXEC_CTRL1); 3912 u32 primary = saved_primary; 3913 u32 secondary = saved_secondary; 3914 bool ctrl = false; 3915 char str[10] = "disabled"; 3916 u8 i = 0, j; 3917 3918 /* 3919 * First test 3920 */ 3921 if (!((ctrl_cpu_rev[0].clr & (CPU_SECONDARY | CPU_TPR_SHADOW)) == 3922 (CPU_SECONDARY | CPU_TPR_SHADOW))) 3923 return; 3924 3925 primary |= CPU_SECONDARY; 3926 primary &= ~CPU_TPR_SHADOW; 3927 vmcs_write(CPU_EXEC_CTRL0, primary); 3928 3929 while (1) { 3930 for (j = 1; j < 8; j++) { 3931 secondary &= ~(CPU_VIRT_X2APIC | CPU_APIC_REG_VIRT | CPU_VINTD); 3932 if (primary & CPU_TPR_SHADOW) { 3933 ctrl = true; 3934 } else { 3935 if (! set_bit_pattern(j, &secondary)) 3936 ctrl = true; 3937 else 3938 ctrl = false; 3939 } 3940 3941 vmcs_write(CPU_EXEC_CTRL1, secondary); 3942 report_prefix_pushf("Use TPR shadow %s, virtualize x2APIC mode %s, APIC-register virtualization %s, virtual-interrupt delivery %s", 3943 str, (secondary & CPU_VIRT_X2APIC) ? "enabled" : "disabled", (secondary & CPU_APIC_REG_VIRT) ? "enabled" : "disabled", (secondary & CPU_VINTD) ? "enabled" : "disabled"); 3944 if (ctrl) 3945 test_vmx_valid_controls(); 3946 else 3947 test_vmx_invalid_controls(); 3948 report_prefix_pop(); 3949 } 3950 3951 if (i == 1) 3952 break; 3953 i++; 3954 3955 primary |= CPU_TPR_SHADOW; 3956 vmcs_write(CPU_EXEC_CTRL0, primary); 3957 strcpy(str, "enabled"); 3958 } 3959 3960 /* 3961 * Second test 3962 */ 3963 u32 apic_virt_ctls = (CPU_VIRT_X2APIC | CPU_VIRT_APIC_ACCESSES); 3964 3965 primary = saved_primary; 3966 secondary = saved_secondary; 3967 if (!((ctrl_cpu_rev[1].clr & apic_virt_ctls) == apic_virt_ctls)) 3968 return; 3969 3970 vmcs_write(CPU_EXEC_CTRL0, primary | CPU_SECONDARY); 3971 secondary &= ~CPU_VIRT_APIC_ACCESSES; 3972 vmcs_write(CPU_EXEC_CTRL1, secondary & ~CPU_VIRT_X2APIC); 3973 report_prefix_pushf("Virtualize x2APIC mode disabled; virtualize APIC access disabled"); 3974 test_vmx_valid_controls(); 3975 report_prefix_pop(); 3976 3977 vmcs_write(CPU_EXEC_CTRL1, secondary | CPU_VIRT_APIC_ACCESSES); 3978 report_prefix_pushf("Virtualize x2APIC mode disabled; virtualize APIC access enabled"); 3979 test_vmx_valid_controls(); 3980 report_prefix_pop(); 3981 3982 vmcs_write(CPU_EXEC_CTRL1, secondary | CPU_VIRT_X2APIC); 3983 report_prefix_pushf("Virtualize x2APIC mode enabled; virtualize APIC access enabled"); 3984 test_vmx_invalid_controls(); 3985 report_prefix_pop(); 3986 3987 vmcs_write(CPU_EXEC_CTRL1, secondary & ~CPU_VIRT_APIC_ACCESSES); 3988 report_prefix_pushf("Virtualize x2APIC mode enabled; virtualize APIC access disabled"); 3989 test_vmx_valid_controls(); 3990 report_prefix_pop(); 3991 3992 vmcs_write(CPU_EXEC_CTRL0, saved_primary); 3993 vmcs_write(CPU_EXEC_CTRL1, saved_secondary); 3994 } 3995 3996 /* 3997 * If the "virtual-interrupt delivery" VM-execution control is 1, the 3998 * "external-interrupt exiting" VM-execution control must be 1. 3999 * [Intel SDM] 4000 */ 4001 static void test_virtual_intr_ctls(void) 4002 { 4003 u32 saved_primary = vmcs_read(CPU_EXEC_CTRL0); 4004 u32 saved_secondary = vmcs_read(CPU_EXEC_CTRL1); 4005 u32 saved_pin = vmcs_read(PIN_CONTROLS); 4006 u32 primary = saved_primary; 4007 u32 secondary = saved_secondary; 4008 u32 pin = saved_pin; 4009 4010 if (!((ctrl_cpu_rev[1].clr & CPU_VINTD) && 4011 (ctrl_pin_rev.clr & PIN_EXTINT))) 4012 return; 4013 4014 vmcs_write(CPU_EXEC_CTRL0, primary | CPU_SECONDARY | CPU_TPR_SHADOW); 4015 vmcs_write(CPU_EXEC_CTRL1, secondary & ~CPU_VINTD); 4016 vmcs_write(PIN_CONTROLS, pin & ~PIN_EXTINT); 4017 report_prefix_pushf("Virtualize interrupt-delivery disabled; external-interrupt exiting disabled"); 4018 test_vmx_valid_controls(); 4019 report_prefix_pop(); 4020 4021 vmcs_write(CPU_EXEC_CTRL1, secondary | CPU_VINTD); 4022 report_prefix_pushf("Virtualize interrupt-delivery enabled; external-interrupt exiting disabled"); 4023 test_vmx_invalid_controls(); 4024 report_prefix_pop(); 4025 4026 vmcs_write(PIN_CONTROLS, pin | PIN_EXTINT); 4027 report_prefix_pushf("Virtualize interrupt-delivery enabled; external-interrupt exiting enabled"); 4028 test_vmx_valid_controls(); 4029 report_prefix_pop(); 4030 4031 vmcs_write(PIN_CONTROLS, pin & ~PIN_EXTINT); 4032 report_prefix_pushf("Virtualize interrupt-delivery enabled; external-interrupt exiting disabled"); 4033 test_vmx_invalid_controls(); 4034 report_prefix_pop(); 4035 4036 vmcs_write(CPU_EXEC_CTRL0, saved_primary); 4037 vmcs_write(CPU_EXEC_CTRL1, saved_secondary); 4038 vmcs_write(PIN_CONTROLS, saved_pin); 4039 } 4040 4041 static void test_pi_desc_addr(u64 addr, bool ctrl) 4042 { 4043 vmcs_write(POSTED_INTR_DESC_ADDR, addr); 4044 report_prefix_pushf("Process-posted-interrupts enabled; posted-interrupt-descriptor-address 0x%lx", addr); 4045 if (ctrl) 4046 test_vmx_valid_controls(); 4047 else 4048 test_vmx_invalid_controls(); 4049 report_prefix_pop(); 4050 } 4051 4052 /* 4053 * If the “process posted interrupts†VM-execution control is 1, the 4054 * following must be true: 4055 * 4056 * - The “virtual-interrupt delivery†VM-execution control is 1. 4057 * - The “acknowledge interrupt on exit†VM-exit control is 1. 4058 * - The posted-interrupt notification vector has a value in the 4059 * - range 0–255 (bits 15:8 are all 0). 4060 * - Bits 5:0 of the posted-interrupt descriptor address are all 0. 4061 * - The posted-interrupt descriptor address does not set any bits 4062 * beyond the processor's physical-address width. 4063 * [Intel SDM] 4064 */ 4065 static void test_posted_intr(void) 4066 { 4067 u32 saved_primary = vmcs_read(CPU_EXEC_CTRL0); 4068 u32 saved_secondary = vmcs_read(CPU_EXEC_CTRL1); 4069 u32 saved_pin = vmcs_read(PIN_CONTROLS); 4070 u32 exit_ctl_saved = vmcs_read(EXI_CONTROLS); 4071 u32 primary = saved_primary; 4072 u32 secondary = saved_secondary; 4073 u32 pin = saved_pin; 4074 u32 exit_ctl = exit_ctl_saved; 4075 u16 vec; 4076 int i; 4077 4078 if (!((ctrl_pin_rev.clr & PIN_POST_INTR) && 4079 (ctrl_cpu_rev[1].clr & CPU_VINTD) && 4080 (ctrl_exit_rev.clr & EXI_INTA))) 4081 return; 4082 4083 vmcs_write(CPU_EXEC_CTRL0, primary | CPU_SECONDARY | CPU_TPR_SHADOW); 4084 4085 /* 4086 * Test virtual-interrupt-delivery and acknowledge-interrupt-on-exit 4087 */ 4088 pin |= PIN_POST_INTR; 4089 vmcs_write(PIN_CONTROLS, pin); 4090 secondary &= ~CPU_VINTD; 4091 vmcs_write(CPU_EXEC_CTRL1, secondary); 4092 report_prefix_pushf("Process-posted-interrupts enabled; virtual-interrupt-delivery disabled"); 4093 test_vmx_invalid_controls(); 4094 report_prefix_pop(); 4095 4096 secondary |= CPU_VINTD; 4097 vmcs_write(CPU_EXEC_CTRL1, secondary); 4098 report_prefix_pushf("Process-posted-interrupts enabled; virtual-interrupt-delivery enabled"); 4099 test_vmx_invalid_controls(); 4100 report_prefix_pop(); 4101 4102 exit_ctl &= ~EXI_INTA; 4103 vmcs_write(EXI_CONTROLS, exit_ctl); 4104 report_prefix_pushf("Process-posted-interrupts enabled; virtual-interrupt-delivery enabled; acknowledge-interrupt-on-exit disabled"); 4105 test_vmx_invalid_controls(); 4106 report_prefix_pop(); 4107 4108 exit_ctl |= EXI_INTA; 4109 vmcs_write(EXI_CONTROLS, exit_ctl); 4110 report_prefix_pushf("Process-posted-interrupts enabled; virtual-interrupt-delivery enabled; acknowledge-interrupt-on-exit enabled"); 4111 test_vmx_valid_controls(); 4112 report_prefix_pop(); 4113 4114 secondary &= ~CPU_VINTD; 4115 vmcs_write(CPU_EXEC_CTRL1, secondary); 4116 report_prefix_pushf("Process-posted-interrupts enabled; virtual-interrupt-delivery disabled; acknowledge-interrupt-on-exit enabled"); 4117 test_vmx_invalid_controls(); 4118 report_prefix_pop(); 4119 4120 secondary |= CPU_VINTD; 4121 vmcs_write(CPU_EXEC_CTRL1, secondary); 4122 report_prefix_pushf("Process-posted-interrupts enabled; virtual-interrupt-delivery enabled; acknowledge-interrupt-on-exit enabled"); 4123 test_vmx_valid_controls(); 4124 report_prefix_pop(); 4125 4126 /* 4127 * Test posted-interrupt notification vector 4128 */ 4129 for (i = 0; i < 8; i++) { 4130 vec = (1ul << i); 4131 vmcs_write(PINV, vec); 4132 report_prefix_pushf("Process-posted-interrupts enabled; posted-interrupt-notification-vector %u", vec); 4133 test_vmx_valid_controls(); 4134 report_prefix_pop(); 4135 } 4136 for (i = 8; i < 16; i++) { 4137 vec = (1ul << i); 4138 vmcs_write(PINV, vec); 4139 report_prefix_pushf("Process-posted-interrupts enabled; posted-interrupt-notification-vector %u", vec); 4140 test_vmx_invalid_controls(); 4141 report_prefix_pop(); 4142 } 4143 4144 vec &= ~(0xff << 8); 4145 vmcs_write(PINV, vec); 4146 report_prefix_pushf("Process-posted-interrupts enabled; posted-interrupt-notification-vector %u", vec); 4147 test_vmx_valid_controls(); 4148 report_prefix_pop(); 4149 4150 /* 4151 * Test posted-interrupt descriptor addresss 4152 */ 4153 for (i = 0; i < 6; i++) { 4154 test_pi_desc_addr(1ul << i, false); 4155 } 4156 4157 test_pi_desc_addr(0xf0, false); 4158 test_pi_desc_addr(0xff, false); 4159 test_pi_desc_addr(0x0f, false); 4160 test_pi_desc_addr(0x8000, true); 4161 test_pi_desc_addr(0x00, true); 4162 test_pi_desc_addr(0xc000, true); 4163 4164 test_vmcs_addr_values("process-posted interrupts", 4165 POSTED_INTR_DESC_ADDR, 64, 4166 false, false, 0, 63); 4167 4168 vmcs_write(CPU_EXEC_CTRL0, saved_primary); 4169 vmcs_write(CPU_EXEC_CTRL1, saved_secondary); 4170 vmcs_write(PIN_CONTROLS, saved_pin); 4171 } 4172 4173 static void test_apic_ctls(void) 4174 { 4175 test_apic_virt_addr(); 4176 test_apic_access_addr(); 4177 test_apic_virtual_ctls(); 4178 test_virtual_intr_ctls(); 4179 test_posted_intr(); 4180 } 4181 4182 /* 4183 * If the “enable VPID†VM-execution control is 1, the value of the 4184 * of the VPID VM-execution control field must not be 0000H. 4185 * [Intel SDM] 4186 */ 4187 static void test_vpid(void) 4188 { 4189 u32 saved_primary = vmcs_read(CPU_EXEC_CTRL0); 4190 u32 saved_secondary = vmcs_read(CPU_EXEC_CTRL1); 4191 u16 vpid = 0x0000; 4192 int i; 4193 4194 if (!((ctrl_cpu_rev[0].clr & CPU_SECONDARY) && 4195 (ctrl_cpu_rev[1].clr & CPU_VPID))) { 4196 printf("Secondary controls and/or VPID not supported\n"); 4197 return; 4198 } 4199 4200 vmcs_write(CPU_EXEC_CTRL0, saved_primary | CPU_SECONDARY); 4201 vmcs_write(CPU_EXEC_CTRL1, saved_secondary & ~CPU_VPID); 4202 vmcs_write(VPID, vpid); 4203 report_prefix_pushf("VPID disabled; VPID value %x", vpid); 4204 test_vmx_valid_controls(); 4205 report_prefix_pop(); 4206 4207 vmcs_write(CPU_EXEC_CTRL1, saved_secondary | CPU_VPID); 4208 report_prefix_pushf("VPID enabled; VPID value %x", vpid); 4209 test_vmx_invalid_controls(); 4210 report_prefix_pop(); 4211 4212 for (i = 0; i < 16; i++) { 4213 vpid = (short)1 << i;; 4214 vmcs_write(VPID, vpid); 4215 report_prefix_pushf("VPID enabled; VPID value %x", vpid); 4216 test_vmx_valid_controls(); 4217 report_prefix_pop(); 4218 } 4219 4220 vmcs_write(CPU_EXEC_CTRL0, saved_primary); 4221 vmcs_write(CPU_EXEC_CTRL1, saved_secondary); 4222 } 4223 4224 static void set_vtpr(unsigned vtpr) 4225 { 4226 *(u32 *)phys_to_virt(vmcs_read(APIC_VIRT_ADDR) + APIC_TASKPRI) = vtpr; 4227 } 4228 4229 static void try_tpr_threshold_and_vtpr(unsigned threshold, unsigned vtpr) 4230 { 4231 bool valid = true; 4232 u32 primary = vmcs_read(CPU_EXEC_CTRL0); 4233 u32 secondary = vmcs_read(CPU_EXEC_CTRL1); 4234 4235 if ((primary & CPU_TPR_SHADOW) && 4236 (!(primary & CPU_SECONDARY) || 4237 !(secondary & (CPU_VINTD | CPU_VIRT_APIC_ACCESSES)))) 4238 valid = (threshold & 0xf) <= ((vtpr >> 4) & 0xf); 4239 4240 set_vtpr(vtpr); 4241 report_prefix_pushf("TPR threshold 0x%x, VTPR.class 0x%x", 4242 threshold, (vtpr >> 4) & 0xf); 4243 if (valid) 4244 test_vmx_valid_controls(); 4245 else 4246 test_vmx_invalid_controls(); 4247 report_prefix_pop(); 4248 } 4249 4250 static void test_invalid_event_injection(void) 4251 { 4252 u32 ent_intr_info_save = vmcs_read(ENT_INTR_INFO); 4253 u32 ent_intr_error_save = vmcs_read(ENT_INTR_ERROR); 4254 u32 ent_inst_len_save = vmcs_read(ENT_INST_LEN); 4255 u32 primary_save = vmcs_read(CPU_EXEC_CTRL0); 4256 u32 secondary_save = vmcs_read(CPU_EXEC_CTRL1); 4257 u64 guest_cr0_save = vmcs_read(GUEST_CR0); 4258 u32 ent_intr_info_base = INTR_INFO_VALID_MASK; 4259 u32 ent_intr_info, ent_intr_err, ent_intr_len; 4260 u32 cnt; 4261 4262 /* Setup */ 4263 report_prefix_push("invalid event injection"); 4264 vmcs_write(ENT_INTR_ERROR, 0x00000000); 4265 vmcs_write(ENT_INST_LEN, 0x00000001); 4266 4267 /* The field’s interruption type is not set to a reserved value. */ 4268 ent_intr_info = ent_intr_info_base | INTR_TYPE_RESERVED | DE_VECTOR; 4269 report_prefix_pushf("%s, VM-entry intr info=0x%x", 4270 "RESERVED interruption type invalid [-]", 4271 ent_intr_info); 4272 vmcs_write(ENT_INTR_INFO, ent_intr_info); 4273 test_vmx_invalid_controls(); 4274 report_prefix_pop(); 4275 4276 ent_intr_info = ent_intr_info_base | INTR_TYPE_EXT_INTR | 4277 DE_VECTOR; 4278 report_prefix_pushf("%s, VM-entry intr info=0x%x", 4279 "RESERVED interruption type invalid [+]", 4280 ent_intr_info); 4281 vmcs_write(ENT_INTR_INFO, ent_intr_info); 4282 test_vmx_valid_controls(); 4283 report_prefix_pop(); 4284 4285 /* If the interruption type is other event, the vector is 0. */ 4286 ent_intr_info = ent_intr_info_base | INTR_TYPE_OTHER_EVENT | DB_VECTOR; 4287 report_prefix_pushf("%s, VM-entry intr info=0x%x", 4288 "(OTHER EVENT && vector != 0) invalid [-]", 4289 ent_intr_info); 4290 vmcs_write(ENT_INTR_INFO, ent_intr_info); 4291 test_vmx_invalid_controls(); 4292 report_prefix_pop(); 4293 4294 /* If the interruption type is NMI, the vector is 2 (negative case). */ 4295 ent_intr_info = ent_intr_info_base | INTR_TYPE_NMI_INTR | DE_VECTOR; 4296 report_prefix_pushf("%s, VM-entry intr info=0x%x", 4297 "(NMI && vector != 2) invalid [-]", ent_intr_info); 4298 vmcs_write(ENT_INTR_INFO, ent_intr_info); 4299 test_vmx_invalid_controls(); 4300 report_prefix_pop(); 4301 4302 /* If the interruption type is NMI, the vector is 2 (positive case). */ 4303 ent_intr_info = ent_intr_info_base | INTR_TYPE_NMI_INTR | NMI_VECTOR; 4304 report_prefix_pushf("%s, VM-entry intr info=0x%x", 4305 "(NMI && vector == 2) valid [+]", ent_intr_info); 4306 vmcs_write(ENT_INTR_INFO, ent_intr_info); 4307 test_vmx_valid_controls(); 4308 report_prefix_pop(); 4309 4310 /* 4311 * If the interruption type 4312 * is HW exception, the vector is at most 31. 4313 */ 4314 ent_intr_info = ent_intr_info_base | INTR_TYPE_HARD_EXCEPTION | 0x20; 4315 report_prefix_pushf("%s, VM-entry intr info=0x%x", 4316 "(HW exception && vector > 31) invalid [-]", 4317 ent_intr_info); 4318 vmcs_write(ENT_INTR_INFO, ent_intr_info); 4319 test_vmx_invalid_controls(); 4320 report_prefix_pop(); 4321 4322 /* 4323 * deliver-error-code is 1 iff either 4324 * (a) the "unrestricted guest" VM-execution control is 0 4325 * (b) CR0.PE is set. 4326 */ 4327 4328 /* Assert that unrestricted guest is disabled or unsupported */ 4329 assert(!(ctrl_cpu_rev[0].clr & CPU_SECONDARY) || 4330 !(secondary_save & CPU_URG)); 4331 4332 ent_intr_info = ent_intr_info_base | INTR_TYPE_HARD_EXCEPTION | 4333 GP_VECTOR; 4334 report_prefix_pushf("%s, VM-entry intr info=0x%x", 4335 "error code <-> (!URG || prot_mode) [-]", 4336 ent_intr_info); 4337 vmcs_write(GUEST_CR0, guest_cr0_save & ~X86_CR0_PE & ~X86_CR0_PG); 4338 vmcs_write(ENT_INTR_INFO, ent_intr_info); 4339 test_vmx_invalid_controls(); 4340 report_prefix_pop(); 4341 4342 ent_intr_info = ent_intr_info_base | INTR_INFO_DELIVER_CODE_MASK | 4343 INTR_TYPE_HARD_EXCEPTION | GP_VECTOR; 4344 report_prefix_pushf("%s, VM-entry intr info=0x%x", 4345 "error code <-> (!URG || prot_mode) [+]", 4346 ent_intr_info); 4347 vmcs_write(GUEST_CR0, guest_cr0_save & ~X86_CR0_PE & ~X86_CR0_PG); 4348 vmcs_write(ENT_INTR_INFO, ent_intr_info); 4349 test_vmx_valid_controls(); 4350 report_prefix_pop(); 4351 4352 if (enable_unrestricted_guest()) 4353 goto skip_unrestricted_guest; 4354 4355 ent_intr_info = ent_intr_info_base | INTR_INFO_DELIVER_CODE_MASK | 4356 INTR_TYPE_HARD_EXCEPTION | GP_VECTOR; 4357 report_prefix_pushf("%s, VM-entry intr info=0x%x", 4358 "error code <-> (!URG || prot_mode) [-]", 4359 ent_intr_info); 4360 vmcs_write(GUEST_CR0, guest_cr0_save & ~X86_CR0_PE & ~X86_CR0_PG); 4361 vmcs_write(ENT_INTR_INFO, ent_intr_info); 4362 test_vmx_invalid_controls(); 4363 report_prefix_pop(); 4364 4365 ent_intr_info = ent_intr_info_base | INTR_TYPE_HARD_EXCEPTION | 4366 GP_VECTOR; 4367 report_prefix_pushf("%s, VM-entry intr info=0x%x", 4368 "error code <-> (!URG || prot_mode) [-]", 4369 ent_intr_info); 4370 vmcs_write(GUEST_CR0, guest_cr0_save | X86_CR0_PE); 4371 vmcs_write(ENT_INTR_INFO, ent_intr_info); 4372 test_vmx_invalid_controls(); 4373 report_prefix_pop(); 4374 4375 vmcs_write(CPU_EXEC_CTRL1, secondary_save); 4376 vmcs_write(CPU_EXEC_CTRL0, primary_save); 4377 4378 skip_unrestricted_guest: 4379 vmcs_write(GUEST_CR0, guest_cr0_save); 4380 4381 /* deliver-error-code is 1 iff the interruption type is HW exception */ 4382 report_prefix_push("error code <-> HW exception"); 4383 for (cnt = 0; cnt < 8; cnt++) { 4384 u32 exception_type_mask = cnt << 8; 4385 u32 deliver_error_code_mask = 4386 exception_type_mask != INTR_TYPE_HARD_EXCEPTION ? 4387 INTR_INFO_DELIVER_CODE_MASK : 0; 4388 4389 ent_intr_info = ent_intr_info_base | deliver_error_code_mask | 4390 exception_type_mask | GP_VECTOR; 4391 report_prefix_pushf("VM-entry intr info=0x%x [-]", 4392 ent_intr_info); 4393 vmcs_write(ENT_INTR_INFO, ent_intr_info); 4394 test_vmx_invalid_controls(); 4395 report_prefix_pop(); 4396 } 4397 report_prefix_pop(); 4398 4399 /* 4400 * deliver-error-code is 1 iff the the vector 4401 * indicates an exception that would normally deliver an error code 4402 */ 4403 report_prefix_push("error code <-> vector delivers error code"); 4404 for (cnt = 0; cnt < 32; cnt++) { 4405 bool has_error_code = false; 4406 u32 deliver_error_code_mask; 4407 4408 switch (cnt) { 4409 case DF_VECTOR: 4410 case TS_VECTOR: 4411 case NP_VECTOR: 4412 case SS_VECTOR: 4413 case GP_VECTOR: 4414 case PF_VECTOR: 4415 case AC_VECTOR: 4416 has_error_code = true; 4417 } 4418 4419 /* Negative case */ 4420 deliver_error_code_mask = has_error_code ? 4421 0 : 4422 INTR_INFO_DELIVER_CODE_MASK; 4423 ent_intr_info = ent_intr_info_base | deliver_error_code_mask | 4424 INTR_TYPE_HARD_EXCEPTION | cnt; 4425 report_prefix_pushf("VM-entry intr info=0x%x [-]", 4426 ent_intr_info); 4427 vmcs_write(ENT_INTR_INFO, ent_intr_info); 4428 test_vmx_invalid_controls(); 4429 report_prefix_pop(); 4430 4431 /* Positive case */ 4432 deliver_error_code_mask = has_error_code ? 4433 INTR_INFO_DELIVER_CODE_MASK : 4434 0; 4435 ent_intr_info = ent_intr_info_base | deliver_error_code_mask | 4436 INTR_TYPE_HARD_EXCEPTION | cnt; 4437 report_prefix_pushf("VM-entry intr info=0x%x [+]", 4438 ent_intr_info); 4439 vmcs_write(ENT_INTR_INFO, ent_intr_info); 4440 test_vmx_valid_controls(); 4441 report_prefix_pop(); 4442 } 4443 report_prefix_pop(); 4444 4445 /* Reserved bits in the field (30:12) are 0. */ 4446 report_prefix_push("reserved bits clear"); 4447 for (cnt = 12; cnt <= 30; cnt++) { 4448 ent_intr_info = ent_intr_info_base | 4449 INTR_INFO_DELIVER_CODE_MASK | 4450 INTR_TYPE_HARD_EXCEPTION | GP_VECTOR | 4451 (1U << cnt); 4452 report_prefix_pushf("VM-entry intr info=0x%x [-]", 4453 ent_intr_info); 4454 vmcs_write(ENT_INTR_INFO, ent_intr_info); 4455 test_vmx_invalid_controls(); 4456 report_prefix_pop(); 4457 } 4458 report_prefix_pop(); 4459 4460 /* 4461 * If deliver-error-code is 1 4462 * bits 31:16 of the VM-entry exception error-code field are 0. 4463 */ 4464 ent_intr_info = ent_intr_info_base | INTR_INFO_DELIVER_CODE_MASK | 4465 INTR_TYPE_HARD_EXCEPTION | GP_VECTOR; 4466 report_prefix_pushf("%s, VM-entry intr info=0x%x", 4467 "VM-entry exception error code[31:16] clear", 4468 ent_intr_info); 4469 vmcs_write(ENT_INTR_INFO, ent_intr_info); 4470 for (cnt = 16; cnt <= 31; cnt++) { 4471 ent_intr_err = 1U << cnt; 4472 report_prefix_pushf("VM-entry intr error=0x%x [-]", 4473 ent_intr_err); 4474 vmcs_write(ENT_INTR_ERROR, ent_intr_err); 4475 test_vmx_invalid_controls(); 4476 report_prefix_pop(); 4477 } 4478 vmcs_write(ENT_INTR_ERROR, 0x00000000); 4479 report_prefix_pop(); 4480 4481 /* 4482 * If the interruption type is software interrupt, software exception, 4483 * or privileged software exception, the VM-entry instruction-length 4484 * field is in the range 0–15. 4485 */ 4486 4487 for (cnt = 0; cnt < 3; cnt++) { 4488 switch (cnt) { 4489 case 0: 4490 ent_intr_info = ent_intr_info_base | 4491 INTR_TYPE_SOFT_INTR; 4492 break; 4493 case 1: 4494 ent_intr_info = ent_intr_info_base | 4495 INTR_TYPE_SOFT_EXCEPTION; 4496 break; 4497 case 2: 4498 ent_intr_info = ent_intr_info_base | 4499 INTR_TYPE_PRIV_SW_EXCEPTION; 4500 break; 4501 } 4502 report_prefix_pushf("%s, VM-entry intr info=0x%x", 4503 "VM-entry instruction-length check", 4504 ent_intr_info); 4505 vmcs_write(ENT_INTR_INFO, ent_intr_info); 4506 4507 /* Instruction length set to -1 (0xFFFFFFFF) should fail */ 4508 ent_intr_len = -1; 4509 report_prefix_pushf("VM-entry intr length = 0x%x [-]", 4510 ent_intr_len); 4511 vmcs_write(ENT_INST_LEN, ent_intr_len); 4512 test_vmx_invalid_controls(); 4513 report_prefix_pop(); 4514 4515 /* Instruction length set to 16 should fail */ 4516 ent_intr_len = 0x00000010; 4517 report_prefix_pushf("VM-entry intr length = 0x%x [-]", 4518 ent_intr_len); 4519 vmcs_write(ENT_INST_LEN, 0x00000010); 4520 test_vmx_invalid_controls(); 4521 report_prefix_pop(); 4522 4523 report_prefix_pop(); 4524 } 4525 4526 /* Cleanup */ 4527 vmcs_write(ENT_INTR_INFO, ent_intr_info_save); 4528 vmcs_write(ENT_INTR_ERROR, ent_intr_error_save); 4529 vmcs_write(ENT_INST_LEN, ent_inst_len_save); 4530 vmcs_write(CPU_EXEC_CTRL0, primary_save); 4531 vmcs_write(CPU_EXEC_CTRL1, secondary_save); 4532 vmcs_write(GUEST_CR0, guest_cr0_save); 4533 report_prefix_pop(); 4534 } 4535 4536 /* 4537 * Test interesting vTPR values for a given TPR threshold. 4538 */ 4539 static void test_vtpr_values(unsigned threshold) 4540 { 4541 try_tpr_threshold_and_vtpr(threshold, (threshold - 1) << 4); 4542 try_tpr_threshold_and_vtpr(threshold, threshold << 4); 4543 try_tpr_threshold_and_vtpr(threshold, (threshold + 1) << 4); 4544 } 4545 4546 static void try_tpr_threshold(unsigned threshold) 4547 { 4548 bool valid = true; 4549 4550 u32 primary = vmcs_read(CPU_EXEC_CTRL0); 4551 u32 secondary = vmcs_read(CPU_EXEC_CTRL1); 4552 4553 if ((primary & CPU_TPR_SHADOW) && !((primary & CPU_SECONDARY) && 4554 (secondary & CPU_VINTD))) 4555 valid = !(threshold >> 4); 4556 4557 set_vtpr(-1); 4558 vmcs_write(TPR_THRESHOLD, threshold); 4559 report_prefix_pushf("TPR threshold 0x%x, VTPR.class 0xf", threshold); 4560 if (valid) 4561 test_vmx_valid_controls(); 4562 else 4563 test_vmx_invalid_controls(); 4564 report_prefix_pop(); 4565 4566 if (valid) 4567 test_vtpr_values(threshold); 4568 } 4569 4570 /* 4571 * Test interesting TPR threshold values. 4572 */ 4573 static void test_tpr_threshold_values(void) 4574 { 4575 unsigned i; 4576 4577 for (i = 0; i < 0x10; i++) 4578 try_tpr_threshold(i); 4579 for (i = 4; i < 32; i++) 4580 try_tpr_threshold(1u << i); 4581 try_tpr_threshold(-1u); 4582 try_tpr_threshold(0x7fffffff); 4583 } 4584 4585 /* 4586 * This test covers the following two VM entry checks: 4587 * 4588 * i) If the "use TPR shadow" VM-execution control is 1 and the 4589 * "virtual-interrupt delivery" VM-execution control is 0, bits 4590 * 31:4 of the TPR threshold VM-execution control field must 4591 be 0. 4592 * [Intel SDM] 4593 * 4594 * ii) If the "use TPR shadow" VM-execution control is 1, the 4595 * "virtual-interrupt delivery" VM-execution control is 0 4596 * and the "virtualize APIC accesses" VM-execution control 4597 * is 0, the value of bits 3:0 of the TPR threshold VM-execution 4598 * control field must not be greater than the value of bits 4599 * 7:4 of VTPR. 4600 * [Intel SDM] 4601 */ 4602 static void test_tpr_threshold(void) 4603 { 4604 u32 primary = vmcs_read(CPU_EXEC_CTRL0); 4605 u64 apic_virt_addr = vmcs_read(APIC_VIRT_ADDR); 4606 u64 threshold = vmcs_read(TPR_THRESHOLD); 4607 void *virtual_apic_page; 4608 4609 if (!(ctrl_cpu_rev[0].clr & CPU_TPR_SHADOW)) 4610 return; 4611 4612 virtual_apic_page = alloc_page(); 4613 memset(virtual_apic_page, 0xff, PAGE_SIZE); 4614 vmcs_write(APIC_VIRT_ADDR, virt_to_phys(virtual_apic_page)); 4615 4616 vmcs_write(CPU_EXEC_CTRL0, primary & ~(CPU_TPR_SHADOW | CPU_SECONDARY)); 4617 report_prefix_pushf("Use TPR shadow disabled, secondary controls disabled"); 4618 test_tpr_threshold_values(); 4619 report_prefix_pop(); 4620 vmcs_write(CPU_EXEC_CTRL0, vmcs_read(CPU_EXEC_CTRL0) | CPU_TPR_SHADOW); 4621 report_prefix_pushf("Use TPR shadow enabled, secondary controls disabled"); 4622 test_tpr_threshold_values(); 4623 report_prefix_pop(); 4624 4625 if (!((ctrl_cpu_rev[0].clr & CPU_SECONDARY) && 4626 (ctrl_cpu_rev[1].clr & (CPU_VINTD | CPU_VIRT_APIC_ACCESSES)))) 4627 goto out; 4628 u32 secondary = vmcs_read(CPU_EXEC_CTRL1); 4629 4630 if (ctrl_cpu_rev[1].clr & CPU_VINTD) { 4631 vmcs_write(CPU_EXEC_CTRL1, CPU_VINTD); 4632 report_prefix_pushf("Use TPR shadow enabled; secondary controls disabled; virtual-interrupt delivery enabled; virtualize APIC accesses disabled"); 4633 test_tpr_threshold_values(); 4634 report_prefix_pop(); 4635 4636 vmcs_write(CPU_EXEC_CTRL0, 4637 vmcs_read(CPU_EXEC_CTRL0) | CPU_SECONDARY); 4638 report_prefix_pushf("Use TPR shadow enabled; secondary controls enabled; virtual-interrupt delivery enabled; virtualize APIC accesses disabled"); 4639 test_tpr_threshold_values(); 4640 report_prefix_pop(); 4641 } 4642 4643 if (ctrl_cpu_rev[1].clr & CPU_VIRT_APIC_ACCESSES) { 4644 vmcs_write(CPU_EXEC_CTRL0, 4645 vmcs_read(CPU_EXEC_CTRL0) & ~CPU_SECONDARY); 4646 vmcs_write(CPU_EXEC_CTRL1, CPU_VIRT_APIC_ACCESSES); 4647 report_prefix_pushf("Use TPR shadow enabled; secondary controls disabled; virtual-interrupt delivery enabled; virtualize APIC accesses enabled"); 4648 test_tpr_threshold_values(); 4649 report_prefix_pop(); 4650 4651 vmcs_write(CPU_EXEC_CTRL0, 4652 vmcs_read(CPU_EXEC_CTRL0) | CPU_SECONDARY); 4653 report_prefix_pushf("Use TPR shadow enabled; secondary controls enabled; virtual-interrupt delivery enabled; virtualize APIC accesses enabled"); 4654 test_tpr_threshold_values(); 4655 report_prefix_pop(); 4656 } 4657 4658 if ((ctrl_cpu_rev[1].clr & 4659 (CPU_VINTD | CPU_VIRT_APIC_ACCESSES)) == 4660 (CPU_VINTD | CPU_VIRT_APIC_ACCESSES)) { 4661 vmcs_write(CPU_EXEC_CTRL0, 4662 vmcs_read(CPU_EXEC_CTRL0) & ~CPU_SECONDARY); 4663 vmcs_write(CPU_EXEC_CTRL1, 4664 CPU_VINTD | CPU_VIRT_APIC_ACCESSES); 4665 report_prefix_pushf("Use TPR shadow enabled; secondary controls disabled; virtual-interrupt delivery enabled; virtualize APIC accesses enabled"); 4666 test_tpr_threshold_values(); 4667 report_prefix_pop(); 4668 4669 vmcs_write(CPU_EXEC_CTRL0, 4670 vmcs_read(CPU_EXEC_CTRL0) | CPU_SECONDARY); 4671 report_prefix_pushf("Use TPR shadow enabled; secondary controls enabled; virtual-interrupt delivery enabled; virtualize APIC accesses enabled"); 4672 test_tpr_threshold_values(); 4673 report_prefix_pop(); 4674 } 4675 4676 vmcs_write(CPU_EXEC_CTRL1, secondary); 4677 out: 4678 vmcs_write(TPR_THRESHOLD, threshold); 4679 vmcs_write(APIC_VIRT_ADDR, apic_virt_addr); 4680 vmcs_write(CPU_EXEC_CTRL0, primary); 4681 } 4682 4683 /* 4684 * This test verifies the following two vmentry checks: 4685 * 4686 * If the "NMI exiting" VM-execution control is 0, "Virtual NMIs" 4687 * VM-execution control must be 0. 4688 * [Intel SDM] 4689 * 4690 * If the “virtual NMIs” VM-execution control is 0, the “NMI-window 4691 * exiting” VM-execution control must be 0. 4692 * [Intel SDM] 4693 */ 4694 static void test_nmi_ctrls(void) 4695 { 4696 u32 pin_ctrls, cpu_ctrls0, test_pin_ctrls, test_cpu_ctrls0; 4697 4698 if ((ctrl_pin_rev.clr & (PIN_NMI | PIN_VIRT_NMI)) != 4699 (PIN_NMI | PIN_VIRT_NMI)) { 4700 printf("NMI exiting and Virtual NMIs are not supported !\n"); 4701 return; 4702 } 4703 4704 /* Save the controls so that we can restore them after our tests */ 4705 pin_ctrls = vmcs_read(PIN_CONTROLS); 4706 cpu_ctrls0 = vmcs_read(CPU_EXEC_CTRL0); 4707 4708 test_pin_ctrls = pin_ctrls & ~(PIN_NMI | PIN_VIRT_NMI); 4709 test_cpu_ctrls0 = cpu_ctrls0 & ~CPU_NMI_WINDOW; 4710 4711 vmcs_write(PIN_CONTROLS, test_pin_ctrls); 4712 report_prefix_pushf("NMI-exiting disabled, virtual-NMIs disabled"); 4713 test_vmx_valid_controls(); 4714 report_prefix_pop(); 4715 4716 vmcs_write(PIN_CONTROLS, test_pin_ctrls | PIN_VIRT_NMI); 4717 report_prefix_pushf("NMI-exiting disabled, virtual-NMIs enabled"); 4718 test_vmx_invalid_controls(); 4719 report_prefix_pop(); 4720 4721 vmcs_write(PIN_CONTROLS, test_pin_ctrls | (PIN_NMI | PIN_VIRT_NMI)); 4722 report_prefix_pushf("NMI-exiting enabled, virtual-NMIs enabled"); 4723 test_vmx_valid_controls(); 4724 report_prefix_pop(); 4725 4726 vmcs_write(PIN_CONTROLS, test_pin_ctrls | PIN_NMI); 4727 report_prefix_pushf("NMI-exiting enabled, virtual-NMIs disabled"); 4728 test_vmx_valid_controls(); 4729 report_prefix_pop(); 4730 4731 if (!(ctrl_cpu_rev[0].clr & CPU_NMI_WINDOW)) { 4732 report_info("NMI-window exiting is not supported, skipping..."); 4733 goto done; 4734 } 4735 4736 vmcs_write(PIN_CONTROLS, test_pin_ctrls); 4737 vmcs_write(CPU_EXEC_CTRL0, test_cpu_ctrls0 | CPU_NMI_WINDOW); 4738 report_prefix_pushf("Virtual-NMIs disabled, NMI-window-exiting enabled"); 4739 test_vmx_invalid_controls(); 4740 report_prefix_pop(); 4741 4742 vmcs_write(PIN_CONTROLS, test_pin_ctrls); 4743 vmcs_write(CPU_EXEC_CTRL0, test_cpu_ctrls0); 4744 report_prefix_pushf("Virtual-NMIs disabled, NMI-window-exiting disabled"); 4745 test_vmx_valid_controls(); 4746 report_prefix_pop(); 4747 4748 vmcs_write(PIN_CONTROLS, test_pin_ctrls | (PIN_NMI | PIN_VIRT_NMI)); 4749 vmcs_write(CPU_EXEC_CTRL0, test_cpu_ctrls0 | CPU_NMI_WINDOW); 4750 report_prefix_pushf("Virtual-NMIs enabled, NMI-window-exiting enabled"); 4751 test_vmx_valid_controls(); 4752 report_prefix_pop(); 4753 4754 vmcs_write(PIN_CONTROLS, test_pin_ctrls | (PIN_NMI | PIN_VIRT_NMI)); 4755 vmcs_write(CPU_EXEC_CTRL0, test_cpu_ctrls0); 4756 report_prefix_pushf("Virtual-NMIs enabled, NMI-window-exiting disabled"); 4757 test_vmx_valid_controls(); 4758 report_prefix_pop(); 4759 4760 /* Restore the controls to their original values */ 4761 vmcs_write(CPU_EXEC_CTRL0, cpu_ctrls0); 4762 done: 4763 vmcs_write(PIN_CONTROLS, pin_ctrls); 4764 } 4765 4766 static void test_eptp_ad_bit(u64 eptp, bool ctrl) 4767 { 4768 vmcs_write(EPTP, eptp); 4769 report_prefix_pushf("Enable-EPT enabled; EPT accessed and dirty flag %s", 4770 (eptp & EPTP_AD_FLAG) ? "1": "0"); 4771 if (ctrl) 4772 test_vmx_valid_controls(); 4773 else 4774 test_vmx_invalid_controls(); 4775 report_prefix_pop(); 4776 4777 } 4778 4779 /* 4780 * 1. If the "enable EPT" VM-execution control is 1, the "EPTP VM-execution" 4781 * control field must satisfy the following checks: 4782 * 4783 * - The EPT memory type (bits 2:0) must be a value supported by the 4784 * processor as indicated in the IA32_VMX_EPT_VPID_CAP MSR. 4785 * - Bits 5:3 (1 less than the EPT page-walk length) must be 3, 4786 * indicating an EPT page-walk length of 4. 4787 * - Bit 6 (enable bit for accessed and dirty flags for EPT) must be 4788 * 0 if bit 21 of the IA32_VMX_EPT_VPID_CAP MSR is read as 0, 4789 * indicating that the processor does not support accessed and dirty 4790 * dirty flags for EPT. 4791 * - Reserved bits 11:7 and 63:N (where N is the processor's 4792 * physical-address width) must all be 0. 4793 * 4794 * 2. If the "unrestricted guest" VM-execution control is 1, the 4795 * "enable EPT" VM-execution control must also be 1. 4796 */ 4797 static void test_ept_eptp(void) 4798 { 4799 u32 primary_saved = vmcs_read(CPU_EXEC_CTRL0); 4800 u32 secondary_saved = vmcs_read(CPU_EXEC_CTRL1); 4801 u64 eptp_saved = vmcs_read(EPTP); 4802 u32 primary = primary_saved; 4803 u32 secondary = secondary_saved; 4804 u64 msr, eptp = eptp_saved; 4805 bool un_cache = false; 4806 bool wr_bk = false; 4807 bool ctrl; 4808 u32 i, maxphysaddr; 4809 u64 j, resv_bits_mask = 0; 4810 4811 if (!((ctrl_cpu_rev[0].clr & CPU_SECONDARY) && 4812 (ctrl_cpu_rev[1].clr & CPU_EPT))) { 4813 printf("\"CPU secondary\" and/or \"enable EPT\" execution controls are not supported !\n"); 4814 return; 4815 } 4816 4817 /* 4818 * Memory type (bits 2:0) 4819 */ 4820 msr = rdmsr(MSR_IA32_VMX_EPT_VPID_CAP); 4821 if (msr & EPT_CAP_UC) 4822 un_cache = true; 4823 if (msr & EPT_CAP_WB) 4824 wr_bk = true; 4825 4826 primary |= CPU_SECONDARY; 4827 vmcs_write(CPU_EXEC_CTRL0, primary); 4828 secondary |= CPU_EPT; 4829 vmcs_write(CPU_EXEC_CTRL1, secondary); 4830 eptp = (eptp & ~EPTP_PG_WALK_LEN_MASK) | 4831 (3ul << EPTP_PG_WALK_LEN_SHIFT); 4832 vmcs_write(EPTP, eptp); 4833 4834 for (i = 0; i < 8; i++) { 4835 if (i == 0) { 4836 if (un_cache) { 4837 report_info("EPT paging structure memory-type is Un-cacheable\n"); 4838 ctrl = true; 4839 } else { 4840 ctrl = false; 4841 } 4842 } else if (i == 6) { 4843 if (wr_bk) { 4844 report_info("EPT paging structure memory-type is Write-back\n"); 4845 ctrl = true; 4846 } else { 4847 ctrl = false; 4848 } 4849 } else { 4850 ctrl = false; 4851 } 4852 4853 eptp = (eptp & ~EPT_MEM_TYPE_MASK) | i; 4854 vmcs_write(EPTP, eptp); 4855 report_prefix_pushf("Enable-EPT enabled; EPT memory type %lu", 4856 eptp & EPT_MEM_TYPE_MASK); 4857 if (ctrl) 4858 test_vmx_valid_controls(); 4859 else 4860 test_vmx_invalid_controls(); 4861 report_prefix_pop(); 4862 } 4863 4864 eptp = (eptp & ~EPT_MEM_TYPE_MASK) | 6ul; 4865 4866 /* 4867 * Page walk length (bits 5:3) 4868 */ 4869 for (i = 0; i < 8; i++) { 4870 eptp = (eptp & ~EPTP_PG_WALK_LEN_MASK) | 4871 (i << EPTP_PG_WALK_LEN_SHIFT); 4872 if (i == 3) 4873 ctrl = true; 4874 else 4875 ctrl = false; 4876 4877 vmcs_write(EPTP, eptp); 4878 report_prefix_pushf("Enable-EPT enabled; EPT page walk length %lu", 4879 eptp & EPTP_PG_WALK_LEN_MASK); 4880 if (ctrl) 4881 test_vmx_valid_controls(); 4882 else 4883 test_vmx_invalid_controls(); 4884 report_prefix_pop(); 4885 } 4886 4887 eptp = (eptp & ~EPTP_PG_WALK_LEN_MASK) | 4888 3ul << EPTP_PG_WALK_LEN_SHIFT; 4889 4890 /* 4891 * Accessed and dirty flag (bit 6) 4892 */ 4893 if (msr & EPT_CAP_AD_FLAG) { 4894 report_info("Processor supports accessed and dirty flag"); 4895 eptp &= ~EPTP_AD_FLAG; 4896 test_eptp_ad_bit(eptp, true); 4897 4898 eptp |= EPTP_AD_FLAG; 4899 test_eptp_ad_bit(eptp, true); 4900 } else { 4901 report_info("Processor does not supports accessed and dirty flag"); 4902 eptp &= ~EPTP_AD_FLAG; 4903 test_eptp_ad_bit(eptp, true); 4904 4905 eptp |= EPTP_AD_FLAG; 4906 test_eptp_ad_bit(eptp, false); 4907 } 4908 4909 /* 4910 * Reserved bits [11:7] and [63:N] 4911 */ 4912 for (i = 0; i < 32; i++) { 4913 eptp = (eptp & 4914 ~(EPTP_RESERV_BITS_MASK << EPTP_RESERV_BITS_SHIFT)) | 4915 (i << EPTP_RESERV_BITS_SHIFT); 4916 vmcs_write(EPTP, eptp); 4917 report_prefix_pushf("Enable-EPT enabled; reserved bits [11:7] %lu", 4918 (eptp >> EPTP_RESERV_BITS_SHIFT) & 4919 EPTP_RESERV_BITS_MASK); 4920 if (i == 0) 4921 test_vmx_valid_controls(); 4922 else 4923 test_vmx_invalid_controls(); 4924 report_prefix_pop(); 4925 } 4926 4927 eptp = (eptp & ~(EPTP_RESERV_BITS_MASK << EPTP_RESERV_BITS_SHIFT)); 4928 4929 maxphysaddr = cpuid_maxphyaddr(); 4930 for (i = 0; i < (63 - maxphysaddr + 1); i++) { 4931 resv_bits_mask |= 1ul << i; 4932 } 4933 4934 for (j = maxphysaddr - 1; j <= 63; j++) { 4935 eptp = (eptp & ~(resv_bits_mask << maxphysaddr)) | 4936 (j < maxphysaddr ? 0 : 1ul << j); 4937 vmcs_write(EPTP, eptp); 4938 report_prefix_pushf("Enable-EPT enabled; reserved bits [63:N] %lu", 4939 (eptp >> maxphysaddr) & resv_bits_mask); 4940 if (j < maxphysaddr) 4941 test_vmx_valid_controls(); 4942 else 4943 test_vmx_invalid_controls(); 4944 report_prefix_pop(); 4945 } 4946 4947 secondary &= ~(CPU_EPT | CPU_URG); 4948 vmcs_write(CPU_EXEC_CTRL1, secondary); 4949 report_prefix_pushf("Enable-EPT disabled, unrestricted-guest disabled"); 4950 test_vmx_valid_controls(); 4951 report_prefix_pop(); 4952 4953 if (!(ctrl_cpu_rev[1].clr & CPU_URG)) 4954 goto skip_unrestricted_guest; 4955 4956 secondary |= CPU_URG; 4957 vmcs_write(CPU_EXEC_CTRL1, secondary); 4958 report_prefix_pushf("Enable-EPT disabled, unrestricted-guest enabled"); 4959 test_vmx_invalid_controls(); 4960 report_prefix_pop(); 4961 4962 secondary |= CPU_EPT; 4963 setup_dummy_ept(); 4964 report_prefix_pushf("Enable-EPT enabled, unrestricted-guest enabled"); 4965 test_vmx_valid_controls(); 4966 report_prefix_pop(); 4967 4968 skip_unrestricted_guest: 4969 secondary &= ~CPU_URG; 4970 vmcs_write(CPU_EXEC_CTRL1, secondary); 4971 report_prefix_pushf("Enable-EPT enabled, unrestricted-guest disabled"); 4972 test_vmx_valid_controls(); 4973 report_prefix_pop(); 4974 4975 vmcs_write(CPU_EXEC_CTRL0, primary_saved); 4976 vmcs_write(CPU_EXEC_CTRL1, secondary_saved); 4977 vmcs_write(EPTP, eptp_saved); 4978 } 4979 4980 /* 4981 * If the 'enable PML' VM-execution control is 1, the 'enable EPT' 4982 * VM-execution control must also be 1. In addition, the PML address 4983 * must satisfy the following checks: 4984 * 4985 * * Bits 11:0 of the address must be 0. 4986 * * The address should not set any bits beyond the processor's 4987 * physical-address width. 4988 * 4989 * [Intel SDM] 4990 */ 4991 static void test_pml(void) 4992 { 4993 u32 primary_saved = vmcs_read(CPU_EXEC_CTRL0); 4994 u32 secondary_saved = vmcs_read(CPU_EXEC_CTRL1); 4995 u32 primary = primary_saved; 4996 u32 secondary = secondary_saved; 4997 4998 if (!((ctrl_cpu_rev[0].clr & CPU_SECONDARY) && 4999 (ctrl_cpu_rev[1].clr & CPU_EPT) && (ctrl_cpu_rev[1].clr & CPU_PML))) { 5000 printf("\"Secondary execution\" control or \"enable EPT\" control or \"enable PML\" control is not supported !\n"); 5001 return; 5002 } 5003 5004 primary |= CPU_SECONDARY; 5005 vmcs_write(CPU_EXEC_CTRL0, primary); 5006 secondary &= ~(CPU_PML | CPU_EPT); 5007 vmcs_write(CPU_EXEC_CTRL1, secondary); 5008 report_prefix_pushf("enable-PML disabled, enable-EPT disabled"); 5009 test_vmx_valid_controls(); 5010 report_prefix_pop(); 5011 5012 secondary |= CPU_PML; 5013 vmcs_write(CPU_EXEC_CTRL1, secondary); 5014 report_prefix_pushf("enable-PML enabled, enable-EPT disabled"); 5015 test_vmx_invalid_controls(); 5016 report_prefix_pop(); 5017 5018 secondary |= CPU_EPT; 5019 setup_dummy_ept(); 5020 report_prefix_pushf("enable-PML enabled, enable-EPT enabled"); 5021 test_vmx_valid_controls(); 5022 report_prefix_pop(); 5023 5024 secondary &= ~CPU_PML; 5025 vmcs_write(CPU_EXEC_CTRL1, secondary); 5026 report_prefix_pushf("enable-PML disabled, enable EPT enabled"); 5027 test_vmx_valid_controls(); 5028 report_prefix_pop(); 5029 5030 test_vmcs_addr_reference(CPU_PML, PMLADDR, "PML address", "PML", 5031 PAGE_SIZE, false, false); 5032 5033 vmcs_write(CPU_EXEC_CTRL0, primary_saved); 5034 vmcs_write(CPU_EXEC_CTRL1, secondary_saved); 5035 } 5036 5037 /* 5038 * If the "activate VMX-preemption timer" VM-execution control is 0, the 5039 * the "save VMX-preemption timer value" VM-exit control must also be 0. 5040 * 5041 * [Intel SDM] 5042 */ 5043 static void test_vmx_preemption_timer(void) 5044 { 5045 u32 saved_pin = vmcs_read(PIN_CONTROLS); 5046 u32 saved_exit = vmcs_read(EXI_CONTROLS); 5047 u32 pin = saved_pin; 5048 u32 exit = saved_exit; 5049 5050 if (!((ctrl_exit_rev.clr & EXI_SAVE_PREEMPT) || 5051 (ctrl_pin_rev.clr & PIN_PREEMPT))) { 5052 printf("\"Save-VMX-preemption-timer\" control and/or \"Enable-VMX-preemption-timer\" control is not supported\n"); 5053 return; 5054 } 5055 5056 pin |= PIN_PREEMPT; 5057 vmcs_write(PIN_CONTROLS, pin); 5058 exit &= ~EXI_SAVE_PREEMPT; 5059 vmcs_write(EXI_CONTROLS, exit); 5060 report_prefix_pushf("enable-VMX-preemption-timer enabled, save-VMX-preemption-timer disabled"); 5061 test_vmx_valid_controls(); 5062 report_prefix_pop(); 5063 5064 exit |= EXI_SAVE_PREEMPT; 5065 vmcs_write(EXI_CONTROLS, exit); 5066 report_prefix_pushf("enable-VMX-preemption-timer enabled, save-VMX-preemption-timer enabled"); 5067 test_vmx_valid_controls(); 5068 report_prefix_pop(); 5069 5070 pin &= ~PIN_PREEMPT; 5071 vmcs_write(PIN_CONTROLS, pin); 5072 report_prefix_pushf("enable-VMX-preemption-timer disabled, save-VMX-preemption-timer enabled"); 5073 test_vmx_invalid_controls(); 5074 report_prefix_pop(); 5075 5076 exit &= ~EXI_SAVE_PREEMPT; 5077 vmcs_write(EXI_CONTROLS, exit); 5078 report_prefix_pushf("enable-VMX-preemption-timer disabled, save-VMX-preemption-timer disabled"); 5079 test_vmx_valid_controls(); 5080 report_prefix_pop(); 5081 5082 vmcs_write(PIN_CONTROLS, saved_pin); 5083 vmcs_write(EXI_CONTROLS, saved_exit); 5084 } 5085 5086 extern unsigned char test_mtf1; 5087 extern unsigned char test_mtf2; 5088 extern unsigned char test_mtf3; 5089 extern unsigned char test_mtf4; 5090 5091 static void test_mtf_guest(void) 5092 { 5093 asm ("vmcall;\n\t" 5094 "out %al, $0x80;\n\t" 5095 "test_mtf1:\n\t" 5096 "vmcall;\n\t" 5097 "out %al, $0x80;\n\t" 5098 "test_mtf2:\n\t" 5099 /* 5100 * Prepare for the 'MOV CR3' test. Attempt to induce a 5101 * general-protection fault by moving a non-canonical address into 5102 * CR3. The 'MOV CR3' instruction does not take an imm64 operand, 5103 * so we must MOV the desired value into a register first. 5104 * 5105 * MOV RAX is done before the VMCALL such that MTF is only enabled 5106 * for the instruction under test. 5107 */ 5108 "mov $0x8000000000000000, %rax;\n\t" 5109 "vmcall;\n\t" 5110 "mov %rax, %cr3;\n\t" 5111 "test_mtf3:\n\t" 5112 "vmcall;\n\t" 5113 /* 5114 * ICEBP/INT1 instruction. Though the instruction is now 5115 * documented, don't rely on assemblers enumerating the 5116 * instruction. Resort to hand assembly. 5117 */ 5118 ".byte 0xf1;\n\t" 5119 "vmcall;\n\t" 5120 "test_mtf4:\n\t" 5121 "mov $0, %eax;\n\t"); 5122 } 5123 5124 static void test_mtf_gp_handler(struct ex_regs *regs) 5125 { 5126 regs->rip = (unsigned long) &test_mtf3; 5127 } 5128 5129 static void test_mtf_db_handler(struct ex_regs *regs) 5130 { 5131 } 5132 5133 static void enable_mtf(void) 5134 { 5135 u32 ctrl0 = vmcs_read(CPU_EXEC_CTRL0); 5136 5137 vmcs_write(CPU_EXEC_CTRL0, ctrl0 | CPU_MTF); 5138 } 5139 5140 static void disable_mtf(void) 5141 { 5142 u32 ctrl0 = vmcs_read(CPU_EXEC_CTRL0); 5143 5144 vmcs_write(CPU_EXEC_CTRL0, ctrl0 & ~CPU_MTF); 5145 } 5146 5147 static void enable_tf(void) 5148 { 5149 unsigned long rflags = vmcs_read(GUEST_RFLAGS); 5150 5151 vmcs_write(GUEST_RFLAGS, rflags | X86_EFLAGS_TF); 5152 } 5153 5154 static void disable_tf(void) 5155 { 5156 unsigned long rflags = vmcs_read(GUEST_RFLAGS); 5157 5158 vmcs_write(GUEST_RFLAGS, rflags & ~X86_EFLAGS_TF); 5159 } 5160 5161 static void report_mtf(const char *insn_name, unsigned long exp_rip) 5162 { 5163 unsigned long rip = vmcs_read(GUEST_RIP); 5164 5165 assert_exit_reason(VMX_MTF); 5166 report(rip == exp_rip, "MTF VM-exit after %s. RIP: 0x%lx (expected 0x%lx)", 5167 insn_name, rip, exp_rip); 5168 } 5169 5170 static void vmx_mtf_test(void) 5171 { 5172 unsigned long pending_dbg; 5173 handler old_gp, old_db; 5174 5175 if (!(ctrl_cpu_rev[0].clr & CPU_MTF)) { 5176 printf("CPU does not support the 'monitor trap flag' processor-based VM-execution control.\n"); 5177 return; 5178 } 5179 5180 test_set_guest(test_mtf_guest); 5181 5182 /* Expect an MTF VM-exit after OUT instruction */ 5183 enter_guest(); 5184 skip_exit_vmcall(); 5185 5186 enable_mtf(); 5187 enter_guest(); 5188 report_mtf("OUT", (unsigned long) &test_mtf1); 5189 disable_mtf(); 5190 5191 /* 5192 * Concurrent #DB trap and MTF on instruction boundary. Expect MTF 5193 * VM-exit with populated 'pending debug exceptions' VMCS field. 5194 */ 5195 enter_guest(); 5196 skip_exit_vmcall(); 5197 5198 enable_mtf(); 5199 enable_tf(); 5200 5201 enter_guest(); 5202 report_mtf("OUT", (unsigned long) &test_mtf2); 5203 pending_dbg = vmcs_read(GUEST_PENDING_DEBUG); 5204 report(pending_dbg & DR_STEP, 5205 "'pending debug exceptions' field after MTF VM-exit: 0x%lx (expected 0x%lx)", 5206 pending_dbg, (unsigned long) DR_STEP); 5207 5208 disable_mtf(); 5209 disable_tf(); 5210 vmcs_write(GUEST_PENDING_DEBUG, 0); 5211 5212 /* 5213 * #GP exception takes priority over MTF. Expect MTF VM-exit with RIP 5214 * advanced to first instruction of #GP handler. 5215 */ 5216 enter_guest(); 5217 skip_exit_vmcall(); 5218 5219 old_gp = handle_exception(GP_VECTOR, test_mtf_gp_handler); 5220 5221 enable_mtf(); 5222 enter_guest(); 5223 report_mtf("MOV CR3", (unsigned long) get_idt_addr(&boot_idt[GP_VECTOR])); 5224 disable_mtf(); 5225 5226 /* 5227 * Concurrent MTF and privileged software exception (i.e. ICEBP/INT1). 5228 * MTF should follow the delivery of #DB trap, though the SDM doesn't 5229 * provide clear indication of the relative priority. 5230 */ 5231 enter_guest(); 5232 skip_exit_vmcall(); 5233 5234 handle_exception(GP_VECTOR, old_gp); 5235 old_db = handle_exception(DB_VECTOR, test_mtf_db_handler); 5236 5237 enable_mtf(); 5238 enter_guest(); 5239 report_mtf("INT1", (unsigned long) get_idt_addr(&boot_idt[DB_VECTOR])); 5240 disable_mtf(); 5241 5242 enter_guest(); 5243 skip_exit_vmcall(); 5244 handle_exception(DB_VECTOR, old_db); 5245 vmcs_write(ENT_INTR_INFO, INTR_INFO_VALID_MASK | INTR_TYPE_OTHER_EVENT); 5246 enter_guest(); 5247 report_mtf("injected MTF", (unsigned long) &test_mtf4); 5248 enter_guest(); 5249 } 5250 5251 /* 5252 * Tests for VM-execution control fields 5253 */ 5254 static void test_vm_execution_ctls(void) 5255 { 5256 test_pin_based_ctls(); 5257 test_primary_processor_based_ctls(); 5258 test_secondary_processor_based_ctls(); 5259 test_cr3_targets(); 5260 test_io_bitmaps(); 5261 test_msr_bitmap(); 5262 test_apic_ctls(); 5263 test_tpr_threshold(); 5264 test_nmi_ctrls(); 5265 test_pml(); 5266 test_vpid(); 5267 test_ept_eptp(); 5268 test_vmx_preemption_timer(); 5269 } 5270 5271 /* 5272 * The following checks are performed for the VM-entry MSR-load address if 5273 * the VM-entry MSR-load count field is non-zero: 5274 * 5275 * - The lower 4 bits of the VM-entry MSR-load address must be 0. 5276 * The address should not set any bits beyond the processor’s 5277 * physical-address width. 5278 * 5279 * - The address of the last byte in the VM-entry MSR-load area 5280 * should not set any bits beyond the processor’s physical-address 5281 * width. The address of this last byte is VM-entry MSR-load address 5282 * + (MSR count * 16) - 1. (The arithmetic used for the computation 5283 * uses more bits than the processor’s physical-address width.) 5284 * 5285 * 5286 * [Intel SDM] 5287 */ 5288 static void test_entry_msr_load(void) 5289 { 5290 entry_msr_load = alloc_page(); 5291 u64 tmp; 5292 u32 entry_msr_ld_cnt = 1; 5293 int i; 5294 u32 addr_len = 64; 5295 5296 vmcs_write(ENT_MSR_LD_CNT, entry_msr_ld_cnt); 5297 5298 /* Check first 4 bits of VM-entry MSR-load address */ 5299 for (i = 0; i < 4; i++) { 5300 tmp = (u64)entry_msr_load | 1ull << i; 5301 vmcs_write(ENTER_MSR_LD_ADDR, tmp); 5302 report_prefix_pushf("VM-entry MSR-load addr [4:0] %lx", 5303 tmp & 0xf); 5304 test_vmx_invalid_controls(); 5305 report_prefix_pop(); 5306 } 5307 5308 if (basic.val & (1ul << 48)) 5309 addr_len = 32; 5310 5311 test_vmcs_addr_values("VM-entry-MSR-load address", 5312 ENTER_MSR_LD_ADDR, 16, false, false, 5313 4, addr_len - 1); 5314 5315 /* 5316 * Check last byte of VM-entry MSR-load address 5317 */ 5318 entry_msr_load = (struct vmx_msr_entry *)((u64)entry_msr_load & ~0xf); 5319 5320 for (i = (addr_len == 64 ? cpuid_maxphyaddr(): addr_len); 5321 i < 64; i++) { 5322 tmp = ((u64)entry_msr_load + entry_msr_ld_cnt * 16 - 1) | 5323 1ul << i; 5324 vmcs_write(ENTER_MSR_LD_ADDR, 5325 tmp - (entry_msr_ld_cnt * 16 - 1)); 5326 test_vmx_invalid_controls(); 5327 } 5328 5329 vmcs_write(ENT_MSR_LD_CNT, 2); 5330 vmcs_write(ENTER_MSR_LD_ADDR, (1ULL << cpuid_maxphyaddr()) - 16); 5331 test_vmx_invalid_controls(); 5332 vmcs_write(ENTER_MSR_LD_ADDR, (1ULL << cpuid_maxphyaddr()) - 32); 5333 test_vmx_valid_controls(); 5334 vmcs_write(ENTER_MSR_LD_ADDR, (1ULL << cpuid_maxphyaddr()) - 48); 5335 test_vmx_valid_controls(); 5336 } 5337 5338 static struct vmx_state_area_test_data { 5339 u32 msr; 5340 u64 exp; 5341 bool enabled; 5342 } vmx_state_area_test_data; 5343 5344 static void guest_state_test_main(void) 5345 { 5346 u64 obs; 5347 struct vmx_state_area_test_data *data = &vmx_state_area_test_data; 5348 5349 while (1) { 5350 if (vmx_get_test_stage() == 2) 5351 break; 5352 5353 if (data->enabled) { 5354 obs = rdmsr(data->msr); 5355 report(data->exp == obs, 5356 "Guest state is 0x%lx (expected 0x%lx)", 5357 obs, data->exp); 5358 } 5359 5360 vmcall(); 5361 } 5362 5363 asm volatile("fnop"); 5364 } 5365 5366 static void test_guest_state(const char *test, bool xfail, u64 field, 5367 const char * field_name) 5368 { 5369 struct vmentry_result result; 5370 u8 abort_flags; 5371 5372 abort_flags = ABORT_ON_EARLY_VMENTRY_FAIL; 5373 if (!xfail) 5374 abort_flags = ABORT_ON_INVALID_GUEST_STATE; 5375 5376 __enter_guest(abort_flags, &result); 5377 5378 report(result.exit_reason.failed_vmentry == xfail && 5379 ((xfail && result.exit_reason.basic == VMX_FAIL_STATE) || 5380 (!xfail && result.exit_reason.basic == VMX_VMCALL)) && 5381 (!xfail || vmcs_read(EXI_QUALIFICATION) == ENTRY_FAIL_DEFAULT), 5382 "%s, %s %lx", test, field_name, field); 5383 5384 if (!result.exit_reason.failed_vmentry) 5385 skip_exit_insn(); 5386 } 5387 5388 /* 5389 * Tests for VM-entry control fields 5390 */ 5391 static void test_vm_entry_ctls(void) 5392 { 5393 test_invalid_event_injection(); 5394 test_entry_msr_load(); 5395 } 5396 5397 /* 5398 * The following checks are performed for the VM-exit MSR-store address if 5399 * the VM-exit MSR-store count field is non-zero: 5400 * 5401 * - The lower 4 bits of the VM-exit MSR-store address must be 0. 5402 * The address should not set any bits beyond the processor’s 5403 * physical-address width. 5404 * 5405 * - The address of the last byte in the VM-exit MSR-store area 5406 * should not set any bits beyond the processor’s physical-address 5407 * width. The address of this last byte is VM-exit MSR-store address 5408 * + (MSR count * 16) - 1. (The arithmetic used for the computation 5409 * uses more bits than the processor’s physical-address width.) 5410 * 5411 * If IA32_VMX_BASIC[48] is read as 1, neither address should set any bits 5412 * in the range 63:32. 5413 * 5414 * [Intel SDM] 5415 */ 5416 static void test_exit_msr_store(void) 5417 { 5418 exit_msr_store = alloc_page(); 5419 u64 tmp; 5420 u32 exit_msr_st_cnt = 1; 5421 int i; 5422 u32 addr_len = 64; 5423 5424 vmcs_write(EXI_MSR_ST_CNT, exit_msr_st_cnt); 5425 5426 /* Check first 4 bits of VM-exit MSR-store address */ 5427 for (i = 0; i < 4; i++) { 5428 tmp = (u64)exit_msr_store | 1ull << i; 5429 vmcs_write(EXIT_MSR_ST_ADDR, tmp); 5430 report_prefix_pushf("VM-exit MSR-store addr [4:0] %lx", 5431 tmp & 0xf); 5432 test_vmx_invalid_controls(); 5433 report_prefix_pop(); 5434 } 5435 5436 if (basic.val & (1ul << 48)) 5437 addr_len = 32; 5438 5439 test_vmcs_addr_values("VM-exit-MSR-store address", 5440 EXIT_MSR_ST_ADDR, 16, false, false, 5441 4, addr_len - 1); 5442 5443 /* 5444 * Check last byte of VM-exit MSR-store address 5445 */ 5446 exit_msr_store = (struct vmx_msr_entry *)((u64)exit_msr_store & ~0xf); 5447 5448 for (i = (addr_len == 64 ? cpuid_maxphyaddr(): addr_len); 5449 i < 64; i++) { 5450 tmp = ((u64)exit_msr_store + exit_msr_st_cnt * 16 - 1) | 5451 1ul << i; 5452 vmcs_write(EXIT_MSR_ST_ADDR, 5453 tmp - (exit_msr_st_cnt * 16 - 1)); 5454 test_vmx_invalid_controls(); 5455 } 5456 5457 vmcs_write(EXI_MSR_ST_CNT, 2); 5458 vmcs_write(EXIT_MSR_ST_ADDR, (1ULL << cpuid_maxphyaddr()) - 16); 5459 test_vmx_invalid_controls(); 5460 vmcs_write(EXIT_MSR_ST_ADDR, (1ULL << cpuid_maxphyaddr()) - 32); 5461 test_vmx_valid_controls(); 5462 vmcs_write(EXIT_MSR_ST_ADDR, (1ULL << cpuid_maxphyaddr()) - 48); 5463 test_vmx_valid_controls(); 5464 } 5465 5466 /* 5467 * Tests for VM-exit controls 5468 */ 5469 static void test_vm_exit_ctls(void) 5470 { 5471 test_exit_msr_store(); 5472 } 5473 5474 /* 5475 * Check that the virtual CPU checks all of the VMX controls as 5476 * documented in the Intel SDM. 5477 */ 5478 static void vmx_controls_test(void) 5479 { 5480 /* 5481 * Bit 1 of the guest's RFLAGS must be 1, or VM-entry will 5482 * fail due to invalid guest state, should we make it that 5483 * far. 5484 */ 5485 vmcs_write(GUEST_RFLAGS, 0); 5486 5487 test_vm_execution_ctls(); 5488 test_vm_exit_ctls(); 5489 test_vm_entry_ctls(); 5490 } 5491 5492 struct apic_reg_virt_config { 5493 bool apic_register_virtualization; 5494 bool use_tpr_shadow; 5495 bool virtualize_apic_accesses; 5496 bool virtualize_x2apic_mode; 5497 bool activate_secondary_controls; 5498 }; 5499 5500 struct apic_reg_test { 5501 const char *name; 5502 struct apic_reg_virt_config apic_reg_virt_config; 5503 }; 5504 5505 struct apic_reg_virt_expectation { 5506 enum Reason rd_exit_reason; 5507 enum Reason wr_exit_reason; 5508 u32 val; 5509 u32 (*virt_fn)(u32); 5510 5511 /* 5512 * If false, accessing the APIC access address from L2 is treated as a 5513 * normal memory operation, rather than triggering virtualization. 5514 */ 5515 bool virtualize_apic_accesses; 5516 }; 5517 5518 static u32 apic_virt_identity(u32 val) 5519 { 5520 return val; 5521 } 5522 5523 static u32 apic_virt_nibble1(u32 val) 5524 { 5525 return val & 0xf0; 5526 } 5527 5528 static u32 apic_virt_byte3(u32 val) 5529 { 5530 return val & (0xff << 24); 5531 } 5532 5533 static bool apic_reg_virt_exit_expectation( 5534 u32 reg, struct apic_reg_virt_config *config, 5535 struct apic_reg_virt_expectation *expectation) 5536 { 5537 /* Good configs, where some L2 APIC accesses are virtualized. */ 5538 bool virtualize_apic_accesses_only = 5539 config->virtualize_apic_accesses && 5540 !config->use_tpr_shadow && 5541 !config->apic_register_virtualization && 5542 !config->virtualize_x2apic_mode && 5543 config->activate_secondary_controls; 5544 bool virtualize_apic_accesses_and_use_tpr_shadow = 5545 config->virtualize_apic_accesses && 5546 config->use_tpr_shadow && 5547 !config->apic_register_virtualization && 5548 !config->virtualize_x2apic_mode && 5549 config->activate_secondary_controls; 5550 bool apic_register_virtualization = 5551 config->virtualize_apic_accesses && 5552 config->use_tpr_shadow && 5553 config->apic_register_virtualization && 5554 !config->virtualize_x2apic_mode && 5555 config->activate_secondary_controls; 5556 5557 expectation->val = MAGIC_VAL_1; 5558 expectation->virt_fn = apic_virt_identity; 5559 expectation->virtualize_apic_accesses = 5560 config->virtualize_apic_accesses && 5561 config->activate_secondary_controls; 5562 if (virtualize_apic_accesses_only) { 5563 expectation->rd_exit_reason = VMX_APIC_ACCESS; 5564 expectation->wr_exit_reason = VMX_APIC_ACCESS; 5565 } else if (virtualize_apic_accesses_and_use_tpr_shadow) { 5566 switch (reg) { 5567 case APIC_TASKPRI: 5568 expectation->rd_exit_reason = VMX_VMCALL; 5569 expectation->wr_exit_reason = VMX_VMCALL; 5570 expectation->virt_fn = apic_virt_nibble1; 5571 break; 5572 default: 5573 expectation->rd_exit_reason = VMX_APIC_ACCESS; 5574 expectation->wr_exit_reason = VMX_APIC_ACCESS; 5575 } 5576 } else if (apic_register_virtualization) { 5577 expectation->rd_exit_reason = VMX_VMCALL; 5578 5579 switch (reg) { 5580 case APIC_ID: 5581 case APIC_EOI: 5582 case APIC_LDR: 5583 case APIC_DFR: 5584 case APIC_SPIV: 5585 case APIC_ESR: 5586 case APIC_ICR: 5587 case APIC_LVTT: 5588 case APIC_LVTTHMR: 5589 case APIC_LVTPC: 5590 case APIC_LVT0: 5591 case APIC_LVT1: 5592 case APIC_LVTERR: 5593 case APIC_TMICT: 5594 case APIC_TDCR: 5595 expectation->wr_exit_reason = VMX_APIC_WRITE; 5596 break; 5597 case APIC_LVR: 5598 case APIC_ISR ... APIC_ISR + 0x70: 5599 case APIC_TMR ... APIC_TMR + 0x70: 5600 case APIC_IRR ... APIC_IRR + 0x70: 5601 expectation->wr_exit_reason = VMX_APIC_ACCESS; 5602 break; 5603 case APIC_TASKPRI: 5604 expectation->wr_exit_reason = VMX_VMCALL; 5605 expectation->virt_fn = apic_virt_nibble1; 5606 break; 5607 case APIC_ICR2: 5608 expectation->wr_exit_reason = VMX_VMCALL; 5609 expectation->virt_fn = apic_virt_byte3; 5610 break; 5611 default: 5612 expectation->rd_exit_reason = VMX_APIC_ACCESS; 5613 expectation->wr_exit_reason = VMX_APIC_ACCESS; 5614 } 5615 } else if (!expectation->virtualize_apic_accesses) { 5616 /* 5617 * No APIC registers are directly virtualized. This includes 5618 * VTPR, which can be virtualized through MOV to/from CR8 via 5619 * the use TPR shadow control, but not through directly 5620 * accessing VTPR. 5621 */ 5622 expectation->rd_exit_reason = VMX_VMCALL; 5623 expectation->wr_exit_reason = VMX_VMCALL; 5624 } else { 5625 printf("Cannot parse APIC register virtualization config:\n" 5626 "\tvirtualize_apic_accesses: %d\n" 5627 "\tuse_tpr_shadow: %d\n" 5628 "\tapic_register_virtualization: %d\n" 5629 "\tvirtualize_x2apic_mode: %d\n" 5630 "\tactivate_secondary_controls: %d\n", 5631 config->virtualize_apic_accesses, 5632 config->use_tpr_shadow, 5633 config->apic_register_virtualization, 5634 config->virtualize_x2apic_mode, 5635 config->activate_secondary_controls); 5636 5637 return false; 5638 } 5639 5640 return true; 5641 } 5642 5643 struct apic_reg_test apic_reg_tests[] = { 5644 /* Good configs, where some L2 APIC accesses are virtualized. */ 5645 { 5646 .name = "Virtualize APIC accesses", 5647 .apic_reg_virt_config = { 5648 .virtualize_apic_accesses = true, 5649 .use_tpr_shadow = false, 5650 .apic_register_virtualization = false, 5651 .virtualize_x2apic_mode = false, 5652 .activate_secondary_controls = true, 5653 }, 5654 }, 5655 { 5656 .name = "Virtualize APIC accesses + Use TPR shadow", 5657 .apic_reg_virt_config = { 5658 .virtualize_apic_accesses = true, 5659 .use_tpr_shadow = true, 5660 .apic_register_virtualization = false, 5661 .virtualize_x2apic_mode = false, 5662 .activate_secondary_controls = true, 5663 }, 5664 }, 5665 { 5666 .name = "APIC-register virtualization", 5667 .apic_reg_virt_config = { 5668 .virtualize_apic_accesses = true, 5669 .use_tpr_shadow = true, 5670 .apic_register_virtualization = true, 5671 .virtualize_x2apic_mode = false, 5672 .activate_secondary_controls = true, 5673 }, 5674 }, 5675 5676 /* 5677 * Test that the secondary processor-based VM-execution controls are 5678 * correctly ignored when "activate secondary controls" is disabled. 5679 */ 5680 { 5681 .name = "Activate secondary controls off", 5682 .apic_reg_virt_config = { 5683 .virtualize_apic_accesses = true, 5684 .use_tpr_shadow = false, 5685 .apic_register_virtualization = true, 5686 .virtualize_x2apic_mode = true, 5687 .activate_secondary_controls = false, 5688 }, 5689 }, 5690 { 5691 .name = "Activate secondary controls off + Use TPR shadow", 5692 .apic_reg_virt_config = { 5693 .virtualize_apic_accesses = true, 5694 .use_tpr_shadow = true, 5695 .apic_register_virtualization = true, 5696 .virtualize_x2apic_mode = true, 5697 .activate_secondary_controls = false, 5698 }, 5699 }, 5700 5701 /* 5702 * Test that the APIC access address is treated like an arbitrary memory 5703 * address when "virtualize APIC accesses" is disabled. 5704 */ 5705 { 5706 .name = "Virtualize APIC accesses off + Use TPR shadow", 5707 .apic_reg_virt_config = { 5708 .virtualize_apic_accesses = false, 5709 .use_tpr_shadow = true, 5710 .apic_register_virtualization = true, 5711 .virtualize_x2apic_mode = true, 5712 .activate_secondary_controls = true, 5713 }, 5714 }, 5715 5716 /* 5717 * Test that VM entry fails due to invalid controls when 5718 * "APIC-register virtualization" is enabled while "use TPR shadow" is 5719 * disabled. 5720 */ 5721 { 5722 .name = "APIC-register virtualization + Use TPR shadow off", 5723 .apic_reg_virt_config = { 5724 .virtualize_apic_accesses = true, 5725 .use_tpr_shadow = false, 5726 .apic_register_virtualization = true, 5727 .virtualize_x2apic_mode = false, 5728 .activate_secondary_controls = true, 5729 }, 5730 }, 5731 5732 /* 5733 * Test that VM entry fails due to invalid controls when 5734 * "Virtualize x2APIC mode" is enabled while "use TPR shadow" is 5735 * disabled. 5736 */ 5737 { 5738 .name = "Virtualize x2APIC mode + Use TPR shadow off", 5739 .apic_reg_virt_config = { 5740 .virtualize_apic_accesses = false, 5741 .use_tpr_shadow = false, 5742 .apic_register_virtualization = false, 5743 .virtualize_x2apic_mode = true, 5744 .activate_secondary_controls = true, 5745 }, 5746 }, 5747 { 5748 .name = "Virtualize x2APIC mode + Use TPR shadow off v2", 5749 .apic_reg_virt_config = { 5750 .virtualize_apic_accesses = false, 5751 .use_tpr_shadow = false, 5752 .apic_register_virtualization = true, 5753 .virtualize_x2apic_mode = true, 5754 .activate_secondary_controls = true, 5755 }, 5756 }, 5757 5758 /* 5759 * Test that VM entry fails due to invalid controls when 5760 * "virtualize x2APIC mode" is enabled while "virtualize APIC accesses" 5761 * is enabled. 5762 */ 5763 { 5764 .name = "Virtualize x2APIC mode + Virtualize APIC accesses", 5765 .apic_reg_virt_config = { 5766 .virtualize_apic_accesses = true, 5767 .use_tpr_shadow = true, 5768 .apic_register_virtualization = false, 5769 .virtualize_x2apic_mode = true, 5770 .activate_secondary_controls = true, 5771 }, 5772 }, 5773 { 5774 .name = "Virtualize x2APIC mode + Virtualize APIC accesses v2", 5775 .apic_reg_virt_config = { 5776 .virtualize_apic_accesses = true, 5777 .use_tpr_shadow = true, 5778 .apic_register_virtualization = true, 5779 .virtualize_x2apic_mode = true, 5780 .activate_secondary_controls = true, 5781 }, 5782 }, 5783 }; 5784 5785 enum Apic_op { 5786 APIC_OP_XAPIC_RD, 5787 APIC_OP_XAPIC_WR, 5788 TERMINATE, 5789 }; 5790 5791 static u32 vmx_xapic_read(u32 *apic_access_address, u32 reg) 5792 { 5793 return *(volatile u32 *)((uintptr_t)apic_access_address + reg); 5794 } 5795 5796 static void vmx_xapic_write(u32 *apic_access_address, u32 reg, u32 val) 5797 { 5798 *(volatile u32 *)((uintptr_t)apic_access_address + reg) = val; 5799 } 5800 5801 struct apic_reg_virt_guest_args { 5802 enum Apic_op op; 5803 u32 *apic_access_address; 5804 u32 reg; 5805 u32 val; 5806 bool check_rd; 5807 u32 (*virt_fn)(u32); 5808 } apic_reg_virt_guest_args; 5809 5810 static void apic_reg_virt_guest(void) 5811 { 5812 volatile struct apic_reg_virt_guest_args *args = 5813 &apic_reg_virt_guest_args; 5814 5815 for (;;) { 5816 enum Apic_op op = args->op; 5817 u32 *apic_access_address = args->apic_access_address; 5818 u32 reg = args->reg; 5819 u32 val = args->val; 5820 bool check_rd = args->check_rd; 5821 u32 (*virt_fn)(u32) = args->virt_fn; 5822 5823 if (op == TERMINATE) 5824 break; 5825 5826 if (op == APIC_OP_XAPIC_RD) { 5827 u32 ret = vmx_xapic_read(apic_access_address, reg); 5828 5829 if (check_rd) { 5830 u32 want = virt_fn(val); 5831 u32 got = virt_fn(ret); 5832 5833 report(got == want, 5834 "read 0x%x, expected 0x%x.", got, want); 5835 } 5836 } else if (op == APIC_OP_XAPIC_WR) { 5837 vmx_xapic_write(apic_access_address, reg, val); 5838 } 5839 5840 /* 5841 * The L1 should always execute a vmcall after it's done testing 5842 * an individual APIC operation. This helps to validate that the 5843 * L1 and L2 are in sync with each other, as expected. 5844 */ 5845 vmcall(); 5846 } 5847 } 5848 5849 static void test_xapic_rd( 5850 u32 reg, struct apic_reg_virt_expectation *expectation, 5851 u32 *apic_access_address, u32 *virtual_apic_page) 5852 { 5853 u32 val = expectation->val; 5854 u32 exit_reason_want = expectation->rd_exit_reason; 5855 struct apic_reg_virt_guest_args *args = &apic_reg_virt_guest_args; 5856 5857 report_prefix_pushf("xapic - reading 0x%03x", reg); 5858 5859 /* Configure guest to do an xapic read */ 5860 args->op = APIC_OP_XAPIC_RD; 5861 args->apic_access_address = apic_access_address; 5862 args->reg = reg; 5863 args->val = val; 5864 args->check_rd = exit_reason_want == VMX_VMCALL; 5865 args->virt_fn = expectation->virt_fn; 5866 5867 /* Setup virtual APIC page */ 5868 if (!expectation->virtualize_apic_accesses) { 5869 apic_access_address[apic_reg_index(reg)] = val; 5870 virtual_apic_page[apic_reg_index(reg)] = 0; 5871 } else if (exit_reason_want == VMX_VMCALL) { 5872 apic_access_address[apic_reg_index(reg)] = 0; 5873 virtual_apic_page[apic_reg_index(reg)] = val; 5874 } 5875 5876 /* Enter guest */ 5877 enter_guest(); 5878 5879 /* 5880 * Validate the behavior and 5881 * pass a magic value back to the guest. 5882 */ 5883 if (exit_reason_want == VMX_APIC_ACCESS) { 5884 u32 apic_page_offset = vmcs_read(EXI_QUALIFICATION) & 0xfff; 5885 5886 assert_exit_reason(exit_reason_want); 5887 report(apic_page_offset == reg, 5888 "got APIC access exit @ page offset 0x%03x, want 0x%03x", 5889 apic_page_offset, reg); 5890 skip_exit_insn(); 5891 5892 /* Reenter guest so it can consume/check rcx and exit again. */ 5893 enter_guest(); 5894 } else if (exit_reason_want != VMX_VMCALL) { 5895 report(false, "Oops, bad exit expectation: %u.", 5896 exit_reason_want); 5897 } 5898 5899 skip_exit_vmcall(); 5900 report_prefix_pop(); 5901 } 5902 5903 static void test_xapic_wr( 5904 u32 reg, struct apic_reg_virt_expectation *expectation, 5905 u32 *apic_access_address, u32 *virtual_apic_page) 5906 { 5907 u32 val = expectation->val; 5908 u32 exit_reason_want = expectation->wr_exit_reason; 5909 struct apic_reg_virt_guest_args *args = &apic_reg_virt_guest_args; 5910 bool virtualized = 5911 expectation->virtualize_apic_accesses && 5912 (exit_reason_want == VMX_APIC_WRITE || 5913 exit_reason_want == VMX_VMCALL); 5914 bool checked = false; 5915 5916 report_prefix_pushf("xapic - writing 0x%x to 0x%03x", val, reg); 5917 5918 /* Configure guest to do an xapic read */ 5919 args->op = APIC_OP_XAPIC_WR; 5920 args->apic_access_address = apic_access_address; 5921 args->reg = reg; 5922 args->val = val; 5923 5924 /* Setup virtual APIC page */ 5925 if (virtualized || !expectation->virtualize_apic_accesses) { 5926 apic_access_address[apic_reg_index(reg)] = 0; 5927 virtual_apic_page[apic_reg_index(reg)] = 0; 5928 } 5929 5930 /* Enter guest */ 5931 enter_guest(); 5932 5933 /* 5934 * Validate the behavior and 5935 * pass a magic value back to the guest. 5936 */ 5937 if (exit_reason_want == VMX_APIC_ACCESS) { 5938 u32 apic_page_offset = vmcs_read(EXI_QUALIFICATION) & 0xfff; 5939 5940 assert_exit_reason(exit_reason_want); 5941 report(apic_page_offset == reg, 5942 "got APIC access exit @ page offset 0x%03x, want 0x%03x", 5943 apic_page_offset, reg); 5944 skip_exit_insn(); 5945 5946 /* Reenter guest so it can consume/check rcx and exit again. */ 5947 enter_guest(); 5948 } else if (exit_reason_want == VMX_APIC_WRITE) { 5949 assert_exit_reason(exit_reason_want); 5950 report(virtual_apic_page[apic_reg_index(reg)] == val, 5951 "got APIC write exit @ page offset 0x%03x; val is 0x%x, want 0x%x", 5952 apic_reg_index(reg), 5953 virtual_apic_page[apic_reg_index(reg)], val); 5954 checked = true; 5955 5956 /* Reenter guest so it can consume/check rcx and exit again. */ 5957 enter_guest(); 5958 } else if (exit_reason_want != VMX_VMCALL) { 5959 report(false, "Oops, bad exit expectation: %u.", 5960 exit_reason_want); 5961 } 5962 5963 assert_exit_reason(VMX_VMCALL); 5964 if (virtualized && !checked) { 5965 u32 want = expectation->virt_fn(val); 5966 u32 got = virtual_apic_page[apic_reg_index(reg)]; 5967 got = expectation->virt_fn(got); 5968 5969 report(got == want, "exitless write; val is 0x%x, want 0x%x", 5970 got, want); 5971 } else if (!expectation->virtualize_apic_accesses && !checked) { 5972 u32 got = apic_access_address[apic_reg_index(reg)]; 5973 5974 report(got == val, 5975 "non-virtualized write; val is 0x%x, want 0x%x", got, 5976 val); 5977 } else if (!expectation->virtualize_apic_accesses && checked) { 5978 report(false, 5979 "Non-virtualized write was prematurely checked!"); 5980 } 5981 5982 skip_exit_vmcall(); 5983 report_prefix_pop(); 5984 } 5985 5986 enum Config_type { 5987 CONFIG_TYPE_GOOD, 5988 CONFIG_TYPE_UNSUPPORTED, 5989 CONFIG_TYPE_VMENTRY_FAILS_EARLY, 5990 }; 5991 5992 static enum Config_type configure_apic_reg_virt_test( 5993 struct apic_reg_virt_config *apic_reg_virt_config) 5994 { 5995 u32 cpu_exec_ctrl0 = vmcs_read(CPU_EXEC_CTRL0); 5996 u32 cpu_exec_ctrl1 = vmcs_read(CPU_EXEC_CTRL1); 5997 /* Configs where L2 entry fails early, due to invalid controls. */ 5998 bool use_tpr_shadow_incorrectly_off = 5999 !apic_reg_virt_config->use_tpr_shadow && 6000 (apic_reg_virt_config->apic_register_virtualization || 6001 apic_reg_virt_config->virtualize_x2apic_mode) && 6002 apic_reg_virt_config->activate_secondary_controls; 6003 bool virtualize_apic_accesses_incorrectly_on = 6004 apic_reg_virt_config->virtualize_apic_accesses && 6005 apic_reg_virt_config->virtualize_x2apic_mode && 6006 apic_reg_virt_config->activate_secondary_controls; 6007 bool vmentry_fails_early = 6008 use_tpr_shadow_incorrectly_off || 6009 virtualize_apic_accesses_incorrectly_on; 6010 6011 if (apic_reg_virt_config->activate_secondary_controls) { 6012 if (!(ctrl_cpu_rev[0].clr & CPU_SECONDARY)) { 6013 printf("VM-execution control \"activate secondary controls\" NOT supported.\n"); 6014 return CONFIG_TYPE_UNSUPPORTED; 6015 } 6016 cpu_exec_ctrl0 |= CPU_SECONDARY; 6017 } else { 6018 cpu_exec_ctrl0 &= ~CPU_SECONDARY; 6019 } 6020 6021 if (apic_reg_virt_config->virtualize_apic_accesses) { 6022 if (!(ctrl_cpu_rev[1].clr & CPU_VIRT_APIC_ACCESSES)) { 6023 printf("VM-execution control \"virtualize APIC accesses\" NOT supported.\n"); 6024 return CONFIG_TYPE_UNSUPPORTED; 6025 } 6026 cpu_exec_ctrl1 |= CPU_VIRT_APIC_ACCESSES; 6027 } else { 6028 cpu_exec_ctrl1 &= ~CPU_VIRT_APIC_ACCESSES; 6029 } 6030 6031 if (apic_reg_virt_config->use_tpr_shadow) { 6032 if (!(ctrl_cpu_rev[0].clr & CPU_TPR_SHADOW)) { 6033 printf("VM-execution control \"use TPR shadow\" NOT supported.\n"); 6034 return CONFIG_TYPE_UNSUPPORTED; 6035 } 6036 cpu_exec_ctrl0 |= CPU_TPR_SHADOW; 6037 } else { 6038 cpu_exec_ctrl0 &= ~CPU_TPR_SHADOW; 6039 } 6040 6041 if (apic_reg_virt_config->apic_register_virtualization) { 6042 if (!(ctrl_cpu_rev[1].clr & CPU_APIC_REG_VIRT)) { 6043 printf("VM-execution control \"APIC-register virtualization\" NOT supported.\n"); 6044 return CONFIG_TYPE_UNSUPPORTED; 6045 } 6046 cpu_exec_ctrl1 |= CPU_APIC_REG_VIRT; 6047 } else { 6048 cpu_exec_ctrl1 &= ~CPU_APIC_REG_VIRT; 6049 } 6050 6051 if (apic_reg_virt_config->virtualize_x2apic_mode) { 6052 if (!(ctrl_cpu_rev[1].clr & CPU_VIRT_X2APIC)) { 6053 printf("VM-execution control \"virtualize x2APIC mode\" NOT supported.\n"); 6054 return CONFIG_TYPE_UNSUPPORTED; 6055 } 6056 cpu_exec_ctrl1 |= CPU_VIRT_X2APIC; 6057 } else { 6058 cpu_exec_ctrl1 &= ~CPU_VIRT_X2APIC; 6059 } 6060 6061 vmcs_write(CPU_EXEC_CTRL0, cpu_exec_ctrl0); 6062 vmcs_write(CPU_EXEC_CTRL1, cpu_exec_ctrl1); 6063 6064 if (vmentry_fails_early) 6065 return CONFIG_TYPE_VMENTRY_FAILS_EARLY; 6066 6067 return CONFIG_TYPE_GOOD; 6068 } 6069 6070 static bool cpu_has_apicv(void) 6071 { 6072 return ((ctrl_cpu_rev[1].clr & CPU_APIC_REG_VIRT) && 6073 (ctrl_cpu_rev[1].clr & CPU_VINTD) && 6074 (ctrl_pin_rev.clr & PIN_POST_INTR)); 6075 } 6076 6077 /* Validates APIC register access across valid virtualization configurations. */ 6078 static void apic_reg_virt_test(void) 6079 { 6080 u32 *apic_access_address; 6081 u32 *virtual_apic_page; 6082 u64 control; 6083 u64 cpu_exec_ctrl0 = vmcs_read(CPU_EXEC_CTRL0); 6084 u64 cpu_exec_ctrl1 = vmcs_read(CPU_EXEC_CTRL1); 6085 int i; 6086 struct apic_reg_virt_guest_args *args = &apic_reg_virt_guest_args; 6087 6088 if (!cpu_has_apicv()) { 6089 report_skip(__func__); 6090 return; 6091 } 6092 6093 control = cpu_exec_ctrl1; 6094 control &= ~CPU_VINTD; 6095 vmcs_write(CPU_EXEC_CTRL1, control); 6096 6097 test_set_guest(apic_reg_virt_guest); 6098 6099 /* 6100 * From the SDM: The 1-setting of the "virtualize APIC accesses" 6101 * VM-execution is guaranteed to apply only if translations to the 6102 * APIC-access address use a 4-KByte page. 6103 */ 6104 apic_access_address = alloc_page(); 6105 force_4k_page(apic_access_address); 6106 vmcs_write(APIC_ACCS_ADDR, virt_to_phys(apic_access_address)); 6107 6108 virtual_apic_page = alloc_page(); 6109 vmcs_write(APIC_VIRT_ADDR, virt_to_phys(virtual_apic_page)); 6110 6111 for (i = 0; i < ARRAY_SIZE(apic_reg_tests); i++) { 6112 struct apic_reg_test *apic_reg_test = &apic_reg_tests[i]; 6113 struct apic_reg_virt_config *apic_reg_virt_config = 6114 &apic_reg_test->apic_reg_virt_config; 6115 enum Config_type config_type; 6116 u32 reg; 6117 6118 printf("--- %s test ---\n", apic_reg_test->name); 6119 config_type = 6120 configure_apic_reg_virt_test(apic_reg_virt_config); 6121 if (config_type == CONFIG_TYPE_UNSUPPORTED) { 6122 printf("Skip because of missing features.\n"); 6123 continue; 6124 } 6125 6126 if (config_type == CONFIG_TYPE_VMENTRY_FAILS_EARLY) { 6127 enter_guest_with_bad_controls(); 6128 continue; 6129 } 6130 6131 for (reg = 0; reg < PAGE_SIZE / sizeof(u32); reg += 0x10) { 6132 struct apic_reg_virt_expectation expectation = {}; 6133 bool ok; 6134 6135 ok = apic_reg_virt_exit_expectation( 6136 reg, apic_reg_virt_config, &expectation); 6137 if (!ok) { 6138 report(false, "Malformed test."); 6139 break; 6140 } 6141 6142 test_xapic_rd(reg, &expectation, apic_access_address, 6143 virtual_apic_page); 6144 test_xapic_wr(reg, &expectation, apic_access_address, 6145 virtual_apic_page); 6146 } 6147 } 6148 6149 /* Terminate the guest */ 6150 vmcs_write(CPU_EXEC_CTRL0, cpu_exec_ctrl0); 6151 vmcs_write(CPU_EXEC_CTRL1, cpu_exec_ctrl1); 6152 args->op = TERMINATE; 6153 enter_guest(); 6154 assert_exit_reason(VMX_VMCALL); 6155 } 6156 6157 struct virt_x2apic_mode_config { 6158 struct apic_reg_virt_config apic_reg_virt_config; 6159 bool virtual_interrupt_delivery; 6160 bool use_msr_bitmaps; 6161 bool disable_x2apic_msr_intercepts; 6162 bool disable_x2apic; 6163 }; 6164 6165 struct virt_x2apic_mode_test_case { 6166 const char *name; 6167 struct virt_x2apic_mode_config virt_x2apic_mode_config; 6168 }; 6169 6170 enum Virt_x2apic_mode_behavior_type { 6171 X2APIC_ACCESS_VIRTUALIZED, 6172 X2APIC_ACCESS_PASSED_THROUGH, 6173 X2APIC_ACCESS_TRIGGERS_GP, 6174 }; 6175 6176 struct virt_x2apic_mode_expectation { 6177 enum Reason rd_exit_reason; 6178 enum Reason wr_exit_reason; 6179 6180 /* 6181 * RDMSR and WRMSR handle 64-bit values. However, except for ICR, all of 6182 * the x2APIC registers are 32 bits. Notice: 6183 * 1. vmx_x2apic_read() clears the upper 32 bits for 32-bit registers. 6184 * 2. vmx_x2apic_write() expects the val arg to be well-formed. 6185 */ 6186 u64 rd_val; 6187 u64 wr_val; 6188 6189 /* 6190 * Compares input to virtualized output; 6191 * 1st arg is pointer to return expected virtualization output. 6192 */ 6193 u64 (*virt_fn)(u64); 6194 6195 enum Virt_x2apic_mode_behavior_type rd_behavior; 6196 enum Virt_x2apic_mode_behavior_type wr_behavior; 6197 bool wr_only; 6198 }; 6199 6200 static u64 virt_x2apic_mode_identity(u64 val) 6201 { 6202 return val; 6203 } 6204 6205 static u64 virt_x2apic_mode_nibble1(u64 val) 6206 { 6207 return val & 0xf0; 6208 } 6209 6210 static void virt_x2apic_mode_rd_expectation( 6211 u32 reg, bool virt_x2apic_mode_on, bool disable_x2apic, 6212 bool apic_register_virtualization, bool virtual_interrupt_delivery, 6213 struct virt_x2apic_mode_expectation *expectation) 6214 { 6215 bool readable = 6216 !x2apic_reg_reserved(reg) && 6217 reg != APIC_EOI; 6218 6219 expectation->rd_exit_reason = VMX_VMCALL; 6220 expectation->virt_fn = virt_x2apic_mode_identity; 6221 if (virt_x2apic_mode_on && apic_register_virtualization) { 6222 expectation->rd_val = MAGIC_VAL_1; 6223 if (reg == APIC_PROCPRI && virtual_interrupt_delivery) 6224 expectation->virt_fn = virt_x2apic_mode_nibble1; 6225 else if (reg == APIC_TASKPRI) 6226 expectation->virt_fn = virt_x2apic_mode_nibble1; 6227 expectation->rd_behavior = X2APIC_ACCESS_VIRTUALIZED; 6228 } else if (virt_x2apic_mode_on && !apic_register_virtualization && 6229 reg == APIC_TASKPRI) { 6230 expectation->rd_val = MAGIC_VAL_1; 6231 expectation->virt_fn = virt_x2apic_mode_nibble1; 6232 expectation->rd_behavior = X2APIC_ACCESS_VIRTUALIZED; 6233 } else if (!disable_x2apic && readable) { 6234 expectation->rd_val = apic_read(reg); 6235 expectation->rd_behavior = X2APIC_ACCESS_PASSED_THROUGH; 6236 } else { 6237 expectation->rd_behavior = X2APIC_ACCESS_TRIGGERS_GP; 6238 } 6239 } 6240 6241 /* 6242 * get_x2apic_wr_val() creates an innocuous write value for an x2APIC register. 6243 * 6244 * For writable registers, get_x2apic_wr_val() deposits the write value into the 6245 * val pointer arg and returns true. For non-writable registers, val is not 6246 * modified and get_x2apic_wr_val() returns false. 6247 */ 6248 static bool get_x2apic_wr_val(u32 reg, u64 *val) 6249 { 6250 switch (reg) { 6251 case APIC_TASKPRI: 6252 /* Bits 31:8 are reserved. */ 6253 *val &= 0xff; 6254 break; 6255 case APIC_EOI: 6256 case APIC_ESR: 6257 case APIC_TMICT: 6258 /* 6259 * EOI, ESR: WRMSR of a non-zero value causes #GP(0). 6260 * TMICT: A write of 0 to the initial-count register effectively 6261 * stops the local APIC timer, in both one-shot and 6262 * periodic mode. 6263 */ 6264 *val = 0; 6265 break; 6266 case APIC_SPIV: 6267 case APIC_LVTT: 6268 case APIC_LVTTHMR: 6269 case APIC_LVTPC: 6270 case APIC_LVT0: 6271 case APIC_LVT1: 6272 case APIC_LVTERR: 6273 case APIC_TDCR: 6274 /* 6275 * To avoid writing a 1 to a reserved bit or causing some other 6276 * unintended side effect, read the current value and use it as 6277 * the write value. 6278 */ 6279 *val = apic_read(reg); 6280 break; 6281 case APIC_CMCI: 6282 if (!apic_lvt_entry_supported(6)) 6283 return false; 6284 *val = apic_read(reg); 6285 break; 6286 case APIC_ICR: 6287 *val = 0x40000 | 0xf1; 6288 break; 6289 case APIC_SELF_IPI: 6290 /* 6291 * With special processing (i.e., virtualize x2APIC mode + 6292 * virtual interrupt delivery), writing zero causes an 6293 * APIC-write VM exit. We plan to add a test for enabling 6294 * "virtual-interrupt delivery" in VMCS12, and that's where we 6295 * will test a self IPI with special processing. 6296 */ 6297 *val = 0x0; 6298 break; 6299 default: 6300 return false; 6301 } 6302 6303 return true; 6304 } 6305 6306 static bool special_processing_applies(u32 reg, u64 *val, 6307 bool virt_int_delivery) 6308 { 6309 bool special_processing = 6310 (reg == APIC_TASKPRI) || 6311 (virt_int_delivery && 6312 (reg == APIC_EOI || reg == APIC_SELF_IPI)); 6313 6314 if (special_processing) { 6315 TEST_ASSERT(get_x2apic_wr_val(reg, val)); 6316 return true; 6317 } 6318 6319 return false; 6320 } 6321 6322 static void virt_x2apic_mode_wr_expectation( 6323 u32 reg, bool virt_x2apic_mode_on, bool disable_x2apic, 6324 bool virt_int_delivery, 6325 struct virt_x2apic_mode_expectation *expectation) 6326 { 6327 expectation->wr_exit_reason = VMX_VMCALL; 6328 expectation->wr_val = MAGIC_VAL_1; 6329 expectation->wr_only = false; 6330 6331 if (virt_x2apic_mode_on && 6332 special_processing_applies(reg, &expectation->wr_val, 6333 virt_int_delivery)) { 6334 expectation->wr_behavior = X2APIC_ACCESS_VIRTUALIZED; 6335 if (reg == APIC_SELF_IPI) 6336 expectation->wr_exit_reason = VMX_APIC_WRITE; 6337 } else if (!disable_x2apic && 6338 get_x2apic_wr_val(reg, &expectation->wr_val)) { 6339 expectation->wr_behavior = X2APIC_ACCESS_PASSED_THROUGH; 6340 if (reg == APIC_EOI || reg == APIC_SELF_IPI) 6341 expectation->wr_only = true; 6342 if (reg == APIC_ICR) 6343 expectation->wr_exit_reason = VMX_EXTINT; 6344 } else { 6345 expectation->wr_behavior = X2APIC_ACCESS_TRIGGERS_GP; 6346 /* 6347 * Writing 1 to a reserved bit triggers a #GP. 6348 * Thus, set the write value to 0, which seems 6349 * the most likely to detect a missed #GP. 6350 */ 6351 expectation->wr_val = 0; 6352 } 6353 } 6354 6355 static void virt_x2apic_mode_exit_expectation( 6356 u32 reg, struct virt_x2apic_mode_config *config, 6357 struct virt_x2apic_mode_expectation *expectation) 6358 { 6359 struct apic_reg_virt_config *base_config = 6360 &config->apic_reg_virt_config; 6361 bool virt_x2apic_mode_on = 6362 base_config->virtualize_x2apic_mode && 6363 config->use_msr_bitmaps && 6364 config->disable_x2apic_msr_intercepts && 6365 base_config->activate_secondary_controls; 6366 6367 virt_x2apic_mode_wr_expectation( 6368 reg, virt_x2apic_mode_on, config->disable_x2apic, 6369 config->virtual_interrupt_delivery, expectation); 6370 virt_x2apic_mode_rd_expectation( 6371 reg, virt_x2apic_mode_on, config->disable_x2apic, 6372 base_config->apic_register_virtualization, 6373 config->virtual_interrupt_delivery, expectation); 6374 } 6375 6376 struct virt_x2apic_mode_test_case virt_x2apic_mode_tests[] = { 6377 /* 6378 * Baseline "virtualize x2APIC mode" configuration: 6379 * - virtualize x2APIC mode 6380 * - virtual-interrupt delivery 6381 * - APIC-register virtualization 6382 * - x2APIC MSR intercepts disabled 6383 * 6384 * Reads come from virtual APIC page, special processing applies to 6385 * VTPR, EOI, and SELF IPI, and all other writes pass through to L1 6386 * APIC. 6387 */ 6388 { 6389 .name = "Baseline", 6390 .virt_x2apic_mode_config = { 6391 .virtual_interrupt_delivery = true, 6392 .use_msr_bitmaps = true, 6393 .disable_x2apic_msr_intercepts = true, 6394 .disable_x2apic = false, 6395 .apic_reg_virt_config = { 6396 .apic_register_virtualization = true, 6397 .use_tpr_shadow = true, 6398 .virtualize_apic_accesses = false, 6399 .virtualize_x2apic_mode = true, 6400 .activate_secondary_controls = true, 6401 }, 6402 }, 6403 }, 6404 { 6405 .name = "Baseline w/ x2apic disabled", 6406 .virt_x2apic_mode_config = { 6407 .virtual_interrupt_delivery = true, 6408 .use_msr_bitmaps = true, 6409 .disable_x2apic_msr_intercepts = true, 6410 .disable_x2apic = true, 6411 .apic_reg_virt_config = { 6412 .apic_register_virtualization = true, 6413 .use_tpr_shadow = true, 6414 .virtualize_apic_accesses = false, 6415 .virtualize_x2apic_mode = true, 6416 .activate_secondary_controls = true, 6417 }, 6418 }, 6419 }, 6420 6421 /* 6422 * Baseline, minus virtual-interrupt delivery. Reads come from virtual 6423 * APIC page, special processing applies to VTPR, and all other writes 6424 * pass through to L1 APIC. 6425 */ 6426 { 6427 .name = "Baseline - virtual interrupt delivery", 6428 .virt_x2apic_mode_config = { 6429 .virtual_interrupt_delivery = false, 6430 .use_msr_bitmaps = true, 6431 .disable_x2apic_msr_intercepts = true, 6432 .disable_x2apic = false, 6433 .apic_reg_virt_config = { 6434 .apic_register_virtualization = true, 6435 .use_tpr_shadow = true, 6436 .virtualize_apic_accesses = false, 6437 .virtualize_x2apic_mode = true, 6438 .activate_secondary_controls = true, 6439 }, 6440 }, 6441 }, 6442 6443 /* 6444 * Baseline, minus APIC-register virtualization. x2APIC reads pass 6445 * through to L1's APIC, unless reading VTPR 6446 */ 6447 { 6448 .name = "Virtualize x2APIC mode, no APIC reg virt", 6449 .virt_x2apic_mode_config = { 6450 .virtual_interrupt_delivery = true, 6451 .use_msr_bitmaps = true, 6452 .disable_x2apic_msr_intercepts = true, 6453 .disable_x2apic = false, 6454 .apic_reg_virt_config = { 6455 .apic_register_virtualization = false, 6456 .use_tpr_shadow = true, 6457 .virtualize_apic_accesses = false, 6458 .virtualize_x2apic_mode = true, 6459 .activate_secondary_controls = true, 6460 }, 6461 }, 6462 }, 6463 { 6464 .name = "Virtualize x2APIC mode, no APIC reg virt, x2APIC off", 6465 .virt_x2apic_mode_config = { 6466 .virtual_interrupt_delivery = true, 6467 .use_msr_bitmaps = true, 6468 .disable_x2apic_msr_intercepts = true, 6469 .disable_x2apic = true, 6470 .apic_reg_virt_config = { 6471 .apic_register_virtualization = false, 6472 .use_tpr_shadow = true, 6473 .virtualize_apic_accesses = false, 6474 .virtualize_x2apic_mode = true, 6475 .activate_secondary_controls = true, 6476 }, 6477 }, 6478 }, 6479 6480 /* 6481 * Enable "virtualize x2APIC mode" and "APIC-register virtualization", 6482 * and disable intercepts for the x2APIC MSRs, but fail to enable 6483 * "activate secondary controls" (i.e. L2 gets access to L1's x2APIC 6484 * MSRs). 6485 */ 6486 { 6487 .name = "Fail to enable activate secondary controls", 6488 .virt_x2apic_mode_config = { 6489 .virtual_interrupt_delivery = true, 6490 .use_msr_bitmaps = true, 6491 .disable_x2apic_msr_intercepts = true, 6492 .disable_x2apic = false, 6493 .apic_reg_virt_config = { 6494 .apic_register_virtualization = true, 6495 .use_tpr_shadow = true, 6496 .virtualize_apic_accesses = false, 6497 .virtualize_x2apic_mode = true, 6498 .activate_secondary_controls = false, 6499 }, 6500 }, 6501 }, 6502 6503 /* 6504 * Enable "APIC-register virtualization" and enable "activate secondary 6505 * controls" and disable intercepts for the x2APIC MSRs, but do not 6506 * enable the "virtualize x2APIC mode" VM-execution control (i.e. L2 6507 * gets access to L1's x2APIC MSRs). 6508 */ 6509 { 6510 .name = "Fail to enable virtualize x2APIC mode", 6511 .virt_x2apic_mode_config = { 6512 .virtual_interrupt_delivery = true, 6513 .use_msr_bitmaps = true, 6514 .disable_x2apic_msr_intercepts = true, 6515 .disable_x2apic = false, 6516 .apic_reg_virt_config = { 6517 .apic_register_virtualization = true, 6518 .use_tpr_shadow = true, 6519 .virtualize_apic_accesses = false, 6520 .virtualize_x2apic_mode = false, 6521 .activate_secondary_controls = true, 6522 }, 6523 }, 6524 }, 6525 6526 /* 6527 * Disable "Virtualize x2APIC mode", disable x2APIC MSR intercepts, and 6528 * enable "APIC-register virtualization" --> L2 gets L1's x2APIC MSRs. 6529 */ 6530 { 6531 .name = "Baseline", 6532 .virt_x2apic_mode_config = { 6533 .virtual_interrupt_delivery = true, 6534 .use_msr_bitmaps = true, 6535 .disable_x2apic_msr_intercepts = true, 6536 .disable_x2apic = false, 6537 .apic_reg_virt_config = { 6538 .apic_register_virtualization = true, 6539 .use_tpr_shadow = true, 6540 .virtualize_apic_accesses = false, 6541 .virtualize_x2apic_mode = false, 6542 .activate_secondary_controls = true, 6543 }, 6544 }, 6545 }, 6546 }; 6547 6548 enum X2apic_op { 6549 X2APIC_OP_RD, 6550 X2APIC_OP_WR, 6551 X2APIC_TERMINATE, 6552 }; 6553 6554 static u64 vmx_x2apic_read(u32 reg) 6555 { 6556 u32 msr_addr = x2apic_msr(reg); 6557 u64 val; 6558 6559 val = rdmsr(msr_addr); 6560 6561 return val; 6562 } 6563 6564 static void vmx_x2apic_write(u32 reg, u64 val) 6565 { 6566 u32 msr_addr = x2apic_msr(reg); 6567 6568 wrmsr(msr_addr, val); 6569 } 6570 6571 struct virt_x2apic_mode_guest_args { 6572 enum X2apic_op op; 6573 u32 reg; 6574 u64 val; 6575 bool should_gp; 6576 u64 (*virt_fn)(u64); 6577 } virt_x2apic_mode_guest_args; 6578 6579 static volatile bool handle_x2apic_gp_ran; 6580 static volatile u32 handle_x2apic_gp_insn_len; 6581 static void handle_x2apic_gp(struct ex_regs *regs) 6582 { 6583 handle_x2apic_gp_ran = true; 6584 regs->rip += handle_x2apic_gp_insn_len; 6585 } 6586 6587 static handler setup_x2apic_gp_handler(void) 6588 { 6589 handler old_handler; 6590 6591 old_handler = handle_exception(GP_VECTOR, handle_x2apic_gp); 6592 /* RDMSR and WRMSR are both 2 bytes, assuming no prefixes. */ 6593 handle_x2apic_gp_insn_len = 2; 6594 6595 return old_handler; 6596 } 6597 6598 static void teardown_x2apic_gp_handler(handler old_handler) 6599 { 6600 handle_exception(GP_VECTOR, old_handler); 6601 6602 /* 6603 * Defensively reset instruction length, so that if the handler is 6604 * incorrectly used, it will loop infinitely, rather than run off into 6605 * la la land. 6606 */ 6607 handle_x2apic_gp_insn_len = 0; 6608 handle_x2apic_gp_ran = false; 6609 } 6610 6611 static void virt_x2apic_mode_guest(void) 6612 { 6613 volatile struct virt_x2apic_mode_guest_args *args = 6614 &virt_x2apic_mode_guest_args; 6615 6616 for (;;) { 6617 enum X2apic_op op = args->op; 6618 u32 reg = args->reg; 6619 u64 val = args->val; 6620 bool should_gp = args->should_gp; 6621 u64 (*virt_fn)(u64) = args->virt_fn; 6622 handler old_handler; 6623 6624 if (op == X2APIC_TERMINATE) 6625 break; 6626 6627 if (should_gp) { 6628 TEST_ASSERT(!handle_x2apic_gp_ran); 6629 old_handler = setup_x2apic_gp_handler(); 6630 } 6631 6632 if (op == X2APIC_OP_RD) { 6633 u64 ret = vmx_x2apic_read(reg); 6634 6635 if (!should_gp) { 6636 u64 want = virt_fn(val); 6637 u64 got = virt_fn(ret); 6638 6639 report(got == want, 6640 "APIC read; got 0x%lx, want 0x%lx.", 6641 got, want); 6642 } 6643 } else if (op == X2APIC_OP_WR) { 6644 vmx_x2apic_write(reg, val); 6645 } 6646 6647 if (should_gp) { 6648 report(handle_x2apic_gp_ran, 6649 "x2APIC op triggered GP."); 6650 teardown_x2apic_gp_handler(old_handler); 6651 } 6652 6653 /* 6654 * The L1 should always execute a vmcall after it's done testing 6655 * an individual APIC operation. This helps to validate that the 6656 * L1 and L2 are in sync with each other, as expected. 6657 */ 6658 vmcall(); 6659 } 6660 } 6661 6662 static void test_x2apic_rd( 6663 u32 reg, struct virt_x2apic_mode_expectation *expectation, 6664 u32 *virtual_apic_page) 6665 { 6666 u64 val = expectation->rd_val; 6667 u32 exit_reason_want = expectation->rd_exit_reason; 6668 struct virt_x2apic_mode_guest_args *args = &virt_x2apic_mode_guest_args; 6669 6670 report_prefix_pushf("x2apic - reading 0x%03x", reg); 6671 6672 /* Configure guest to do an x2apic read */ 6673 args->op = X2APIC_OP_RD; 6674 args->reg = reg; 6675 args->val = val; 6676 args->should_gp = expectation->rd_behavior == X2APIC_ACCESS_TRIGGERS_GP; 6677 args->virt_fn = expectation->virt_fn; 6678 6679 /* Setup virtual APIC page */ 6680 if (expectation->rd_behavior == X2APIC_ACCESS_VIRTUALIZED) 6681 virtual_apic_page[apic_reg_index(reg)] = (u32)val; 6682 6683 /* Enter guest */ 6684 enter_guest(); 6685 6686 if (exit_reason_want != VMX_VMCALL) { 6687 report(false, "Oops, bad exit expectation: %u.", 6688 exit_reason_want); 6689 } 6690 6691 skip_exit_vmcall(); 6692 report_prefix_pop(); 6693 } 6694 6695 static volatile bool handle_x2apic_ipi_ran; 6696 static void handle_x2apic_ipi(isr_regs_t *regs) 6697 { 6698 handle_x2apic_ipi_ran = true; 6699 eoi(); 6700 } 6701 6702 static void test_x2apic_wr( 6703 u32 reg, struct virt_x2apic_mode_expectation *expectation, 6704 u32 *virtual_apic_page) 6705 { 6706 u64 val = expectation->wr_val; 6707 u32 exit_reason_want = expectation->wr_exit_reason; 6708 struct virt_x2apic_mode_guest_args *args = &virt_x2apic_mode_guest_args; 6709 int ipi_vector = 0xf1; 6710 u32 restore_val = 0; 6711 6712 report_prefix_pushf("x2apic - writing 0x%lx to 0x%03x", val, reg); 6713 6714 /* Configure guest to do an x2apic read */ 6715 args->op = X2APIC_OP_WR; 6716 args->reg = reg; 6717 args->val = val; 6718 args->should_gp = expectation->wr_behavior == X2APIC_ACCESS_TRIGGERS_GP; 6719 6720 /* Setup virtual APIC page */ 6721 if (expectation->wr_behavior == X2APIC_ACCESS_VIRTUALIZED) 6722 virtual_apic_page[apic_reg_index(reg)] = 0; 6723 if (expectation->wr_behavior == X2APIC_ACCESS_PASSED_THROUGH && !expectation->wr_only) 6724 restore_val = apic_read(reg); 6725 6726 /* Setup IPI handler */ 6727 handle_x2apic_ipi_ran = false; 6728 handle_irq(ipi_vector, handle_x2apic_ipi); 6729 6730 /* Enter guest */ 6731 enter_guest(); 6732 6733 /* 6734 * Validate the behavior and 6735 * pass a magic value back to the guest. 6736 */ 6737 if (exit_reason_want == VMX_EXTINT) { 6738 assert_exit_reason(exit_reason_want); 6739 6740 /* Clear the external interrupt. */ 6741 irq_enable(); 6742 asm volatile ("nop"); 6743 irq_disable(); 6744 report(handle_x2apic_ipi_ran, 6745 "Got pending interrupt after IRQ enabled."); 6746 6747 enter_guest(); 6748 } else if (exit_reason_want == VMX_APIC_WRITE) { 6749 assert_exit_reason(exit_reason_want); 6750 report(virtual_apic_page[apic_reg_index(reg)] == val, 6751 "got APIC write exit @ page offset 0x%03x; val is 0x%x, want 0x%lx", 6752 apic_reg_index(reg), 6753 virtual_apic_page[apic_reg_index(reg)], val); 6754 6755 /* Reenter guest so it can consume/check rcx and exit again. */ 6756 enter_guest(); 6757 } else if (exit_reason_want != VMX_VMCALL) { 6758 report(false, "Oops, bad exit expectation: %u.", 6759 exit_reason_want); 6760 } 6761 6762 assert_exit_reason(VMX_VMCALL); 6763 if (expectation->wr_behavior == X2APIC_ACCESS_VIRTUALIZED) { 6764 u64 want = val; 6765 u32 got = virtual_apic_page[apic_reg_index(reg)]; 6766 6767 report(got == want, "x2APIC write; got 0x%x, want 0x%lx", got, 6768 want); 6769 } else if (expectation->wr_behavior == X2APIC_ACCESS_PASSED_THROUGH) { 6770 if (!expectation->wr_only) { 6771 u32 got = apic_read(reg); 6772 bool ok; 6773 6774 /* 6775 * When L1's TPR is passed through to L2, the lower 6776 * nibble can be lost. For example, if L2 executes 6777 * WRMSR(0x808, 0x78), then, L1 might read 0x70. 6778 * 6779 * Here's how the lower nibble can get lost: 6780 * 1. L2 executes WRMSR(0x808, 0x78). 6781 * 2. L2 exits to L0 with a WRMSR exit. 6782 * 3. L0 emulates WRMSR, by writing L1's TPR. 6783 * 4. L0 re-enters L2. 6784 * 5. L2 exits to L0 (reason doesn't matter). 6785 * 6. L0 reflects L2's exit to L1. 6786 * 7. Before entering L1, L0 exits to user-space 6787 * (e.g., to satisfy TPR access reporting). 6788 * 8. User-space executes KVM_SET_REGS ioctl, which 6789 * clears the lower nibble of L1's TPR. 6790 */ 6791 if (reg == APIC_TASKPRI) { 6792 got = apic_virt_nibble1(got); 6793 val = apic_virt_nibble1(val); 6794 } 6795 6796 ok = got == val; 6797 report(ok, 6798 "non-virtualized write; val is 0x%x, want 0x%lx", 6799 got, val); 6800 apic_write(reg, restore_val); 6801 } else { 6802 report(true, "non-virtualized and write-only OK"); 6803 } 6804 } 6805 skip_exit_insn(); 6806 6807 report_prefix_pop(); 6808 } 6809 6810 static enum Config_type configure_virt_x2apic_mode_test( 6811 struct virt_x2apic_mode_config *virt_x2apic_mode_config, 6812 u8 *msr_bitmap_page) 6813 { 6814 int msr; 6815 u32 cpu_exec_ctrl0 = vmcs_read(CPU_EXEC_CTRL0); 6816 u64 cpu_exec_ctrl1 = vmcs_read(CPU_EXEC_CTRL1); 6817 6818 /* x2apic-specific VMCS config */ 6819 if (virt_x2apic_mode_config->use_msr_bitmaps) { 6820 /* virt_x2apic_mode_test() checks for MSR bitmaps support */ 6821 cpu_exec_ctrl0 |= CPU_MSR_BITMAP; 6822 } else { 6823 cpu_exec_ctrl0 &= ~CPU_MSR_BITMAP; 6824 } 6825 6826 if (virt_x2apic_mode_config->virtual_interrupt_delivery) { 6827 if (!(ctrl_cpu_rev[1].clr & CPU_VINTD)) { 6828 report_skip("VM-execution control \"virtual-interrupt delivery\" NOT supported.\n"); 6829 return CONFIG_TYPE_UNSUPPORTED; 6830 } 6831 cpu_exec_ctrl1 |= CPU_VINTD; 6832 } else { 6833 cpu_exec_ctrl1 &= ~CPU_VINTD; 6834 } 6835 6836 vmcs_write(CPU_EXEC_CTRL0, cpu_exec_ctrl0); 6837 vmcs_write(CPU_EXEC_CTRL1, cpu_exec_ctrl1); 6838 6839 /* x2APIC MSR intercepts are usually off for "Virtualize x2APIC mode" */ 6840 for (msr = 0x800; msr <= 0x8ff; msr++) { 6841 if (virt_x2apic_mode_config->disable_x2apic_msr_intercepts) { 6842 clear_bit(msr, msr_bitmap_page + 0x000); 6843 clear_bit(msr, msr_bitmap_page + 0x800); 6844 } else { 6845 set_bit(msr, msr_bitmap_page + 0x000); 6846 set_bit(msr, msr_bitmap_page + 0x800); 6847 } 6848 } 6849 6850 /* x2APIC mode can impact virtualization */ 6851 reset_apic(); 6852 if (!virt_x2apic_mode_config->disable_x2apic) 6853 enable_x2apic(); 6854 6855 return configure_apic_reg_virt_test( 6856 &virt_x2apic_mode_config->apic_reg_virt_config); 6857 } 6858 6859 static void virt_x2apic_mode_test(void) 6860 { 6861 u32 *virtual_apic_page; 6862 u8 *msr_bitmap_page; 6863 u64 cpu_exec_ctrl0 = vmcs_read(CPU_EXEC_CTRL0); 6864 u64 cpu_exec_ctrl1 = vmcs_read(CPU_EXEC_CTRL1); 6865 int i; 6866 struct virt_x2apic_mode_guest_args *args = &virt_x2apic_mode_guest_args; 6867 6868 if (!cpu_has_apicv()) { 6869 report_skip(__func__); 6870 return; 6871 } 6872 6873 /* 6874 * This is to exercise an issue in KVM's logic to merge L0's and L1's 6875 * MSR bitmaps. Previously, an L1 could get at L0's x2APIC MSRs by 6876 * writing the IA32_SPEC_CTRL MSR or the IA32_PRED_CMD MSRs. KVM would 6877 * then proceed to manipulate the MSR bitmaps, as if VMCS12 had the 6878 * "Virtualize x2APIC mod" control set, even when it didn't. 6879 */ 6880 if (has_spec_ctrl()) 6881 wrmsr(MSR_IA32_SPEC_CTRL, 1); 6882 6883 /* 6884 * Check that VMCS12 supports: 6885 * - "Virtual-APIC address", indicated by "use TPR shadow" 6886 * - "MSR-bitmap address", indicated by "use MSR bitmaps" 6887 */ 6888 if (!(ctrl_cpu_rev[0].clr & CPU_TPR_SHADOW)) { 6889 report_skip("VM-execution control \"use TPR shadow\" NOT supported.\n"); 6890 return; 6891 } else if (!(ctrl_cpu_rev[0].clr & CPU_MSR_BITMAP)) { 6892 report_skip("VM-execution control \"use MSR bitmaps\" NOT supported.\n"); 6893 return; 6894 } 6895 6896 test_set_guest(virt_x2apic_mode_guest); 6897 6898 virtual_apic_page = alloc_page(); 6899 vmcs_write(APIC_VIRT_ADDR, virt_to_phys(virtual_apic_page)); 6900 6901 msr_bitmap_page = alloc_page(); 6902 memset(msr_bitmap_page, 0xff, PAGE_SIZE); 6903 vmcs_write(MSR_BITMAP, virt_to_phys(msr_bitmap_page)); 6904 6905 for (i = 0; i < ARRAY_SIZE(virt_x2apic_mode_tests); i++) { 6906 struct virt_x2apic_mode_test_case *virt_x2apic_mode_test_case = 6907 &virt_x2apic_mode_tests[i]; 6908 struct virt_x2apic_mode_config *virt_x2apic_mode_config = 6909 &virt_x2apic_mode_test_case->virt_x2apic_mode_config; 6910 enum Config_type config_type; 6911 u32 reg; 6912 6913 printf("--- %s test ---\n", virt_x2apic_mode_test_case->name); 6914 config_type = 6915 configure_virt_x2apic_mode_test(virt_x2apic_mode_config, 6916 msr_bitmap_page); 6917 if (config_type == CONFIG_TYPE_UNSUPPORTED) { 6918 report_skip("Skip because of missing features.\n"); 6919 continue; 6920 } else if (config_type == CONFIG_TYPE_VMENTRY_FAILS_EARLY) { 6921 enter_guest_with_bad_controls(); 6922 continue; 6923 } 6924 6925 for (reg = 0; reg < PAGE_SIZE / sizeof(u32); reg += 0x10) { 6926 struct virt_x2apic_mode_expectation expectation; 6927 6928 virt_x2apic_mode_exit_expectation( 6929 reg, virt_x2apic_mode_config, &expectation); 6930 6931 test_x2apic_rd(reg, &expectation, virtual_apic_page); 6932 test_x2apic_wr(reg, &expectation, virtual_apic_page); 6933 } 6934 } 6935 6936 6937 /* Terminate the guest */ 6938 vmcs_write(CPU_EXEC_CTRL0, cpu_exec_ctrl0); 6939 vmcs_write(CPU_EXEC_CTRL1, cpu_exec_ctrl1); 6940 args->op = X2APIC_TERMINATE; 6941 enter_guest(); 6942 assert_exit_reason(VMX_VMCALL); 6943 } 6944 6945 static void test_ctl_reg(const char *cr_name, u64 cr, u64 fixed0, u64 fixed1) 6946 { 6947 u64 val; 6948 u64 cr_saved = vmcs_read(cr); 6949 int i; 6950 6951 val = fixed0 & fixed1; 6952 if (cr == HOST_CR4) 6953 vmcs_write(cr, val | X86_CR4_PAE); 6954 else 6955 vmcs_write(cr, val); 6956 report_prefix_pushf("%s %lx", cr_name, val); 6957 if (val == fixed0) 6958 test_vmx_vmlaunch(0); 6959 else 6960 test_vmx_vmlaunch(VMXERR_ENTRY_INVALID_HOST_STATE_FIELD); 6961 report_prefix_pop(); 6962 6963 for (i = 0; i < 64; i++) { 6964 6965 /* Set a bit when the corresponding bit in fixed1 is 0 */ 6966 if ((fixed1 & (1ull << i)) == 0) { 6967 if (cr == HOST_CR4 && ((1ull << i) & X86_CR4_SMEP || 6968 (1ull << i) & X86_CR4_SMAP)) 6969 continue; 6970 6971 vmcs_write(cr, cr_saved | (1ull << i)); 6972 report_prefix_pushf("%s %llx", cr_name, 6973 cr_saved | (1ull << i)); 6974 test_vmx_vmlaunch( 6975 VMXERR_ENTRY_INVALID_HOST_STATE_FIELD); 6976 report_prefix_pop(); 6977 } 6978 6979 /* Unset a bit when the corresponding bit in fixed0 is 1 */ 6980 if (fixed0 & (1ull << i)) { 6981 vmcs_write(cr, cr_saved & ~(1ull << i)); 6982 report_prefix_pushf("%s %llx", cr_name, 6983 cr_saved & ~(1ull << i)); 6984 test_vmx_vmlaunch( 6985 VMXERR_ENTRY_INVALID_HOST_STATE_FIELD); 6986 report_prefix_pop(); 6987 } 6988 } 6989 6990 vmcs_write(cr, cr_saved); 6991 } 6992 6993 /* 6994 * 1. The CR0 field must not set any bit to a value not supported in VMX 6995 * operation. 6996 * 2. The CR4 field must not set any bit to a value not supported in VMX 6997 * operation. 6998 * 3. On processors that support Intel 64 architecture, the CR3 field must 6999 * be such that bits 63:52 and bits in the range 51:32 beyond the 7000 * processor’s physical-address width must be 0. 7001 * 7002 * [Intel SDM] 7003 */ 7004 static void test_host_ctl_regs(void) 7005 { 7006 u64 fixed0, fixed1, cr3, cr3_saved; 7007 int i; 7008 7009 /* Test CR0 */ 7010 fixed0 = rdmsr(MSR_IA32_VMX_CR0_FIXED0); 7011 fixed1 = rdmsr(MSR_IA32_VMX_CR0_FIXED1); 7012 test_ctl_reg("HOST_CR0", HOST_CR0, fixed0, fixed1); 7013 7014 /* Test CR4 */ 7015 fixed0 = rdmsr(MSR_IA32_VMX_CR4_FIXED0); 7016 fixed1 = rdmsr(MSR_IA32_VMX_CR4_FIXED1) & 7017 ~(X86_CR4_SMEP | X86_CR4_SMAP); 7018 test_ctl_reg("HOST_CR4", HOST_CR4, fixed0, fixed1); 7019 7020 /* Test CR3 */ 7021 cr3_saved = vmcs_read(HOST_CR3); 7022 for (i = cpuid_maxphyaddr(); i < 64; i++) { 7023 cr3 = cr3_saved | (1ul << i); 7024 vmcs_write(HOST_CR3, cr3); 7025 report_prefix_pushf("HOST_CR3 %lx", cr3); 7026 test_vmx_vmlaunch(VMXERR_ENTRY_INVALID_HOST_STATE_FIELD); 7027 report_prefix_pop(); 7028 } 7029 7030 vmcs_write(HOST_CR3, cr3_saved); 7031 } 7032 7033 static void test_efer_vmlaunch(u32 fld, bool ok) 7034 { 7035 if (fld == HOST_EFER) { 7036 if (ok) 7037 test_vmx_vmlaunch(0); 7038 else 7039 test_vmx_vmlaunch2(VMXERR_ENTRY_INVALID_CONTROL_FIELD, 7040 VMXERR_ENTRY_INVALID_HOST_STATE_FIELD); 7041 } else { 7042 test_guest_state("EFER test", !ok, GUEST_EFER, "GUEST_EFER"); 7043 } 7044 } 7045 7046 static void test_efer_one(u32 fld, const char * fld_name, u64 efer, 7047 u32 ctrl_fld, u64 ctrl, 7048 int i, const char *efer_bit_name) 7049 { 7050 bool ok; 7051 7052 ok = true; 7053 if (ctrl_fld == EXI_CONTROLS && (ctrl & EXI_LOAD_EFER)) { 7054 if (!!(efer & EFER_LMA) != !!(ctrl & EXI_HOST_64)) 7055 ok = false; 7056 if (!!(efer & EFER_LME) != !!(ctrl & EXI_HOST_64)) 7057 ok = false; 7058 } 7059 if (ctrl_fld == ENT_CONTROLS && (ctrl & ENT_LOAD_EFER)) { 7060 /* Check LMA too since CR0.PG is set. */ 7061 if (!!(efer & EFER_LMA) != !!(ctrl & ENT_GUEST_64)) 7062 ok = false; 7063 if (!!(efer & EFER_LME) != !!(ctrl & ENT_GUEST_64)) 7064 ok = false; 7065 } 7066 7067 /* 7068 * Skip the test if it would enter the guest in 32-bit mode. 7069 * Perhaps write the test in assembly and make sure it 7070 * can be run in either mode? 7071 */ 7072 if (fld == GUEST_EFER && ok && !(ctrl & ENT_GUEST_64)) 7073 return; 7074 7075 vmcs_write(ctrl_fld, ctrl); 7076 vmcs_write(fld, efer); 7077 report_prefix_pushf("%s %s bit turned %s, controls %s", 7078 fld_name, efer_bit_name, 7079 (i & 1) ? "on" : "off", 7080 (i & 2) ? "on" : "off"); 7081 7082 test_efer_vmlaunch(fld, ok); 7083 report_prefix_pop(); 7084 } 7085 7086 static void test_efer_bit(u32 fld, const char * fld_name, 7087 u32 ctrl_fld, u64 ctrl_bit, u64 efer_bit, 7088 const char *efer_bit_name) 7089 { 7090 u64 efer_saved = vmcs_read(fld); 7091 u32 ctrl_saved = vmcs_read(ctrl_fld); 7092 int i; 7093 7094 for (i = 0; i < 4; i++) { 7095 u64 efer = efer_saved & ~efer_bit; 7096 u64 ctrl = ctrl_saved & ~ctrl_bit; 7097 7098 if (i & 1) 7099 efer |= efer_bit; 7100 if (i & 2) 7101 ctrl |= ctrl_bit; 7102 7103 test_efer_one(fld, fld_name, efer, ctrl_fld, ctrl, 7104 i, efer_bit_name); 7105 } 7106 7107 vmcs_write(ctrl_fld, ctrl_saved); 7108 vmcs_write(fld, efer_saved); 7109 } 7110 7111 static void test_efer(u32 fld, const char * fld_name, u32 ctrl_fld, 7112 u64 ctrl_bit1, u64 ctrl_bit2) 7113 { 7114 u64 efer_saved = vmcs_read(fld); 7115 u32 ctrl_saved = vmcs_read(ctrl_fld); 7116 u64 efer_reserved_bits = ~((u64)(EFER_SCE | EFER_LME | EFER_LMA)); 7117 u64 i; 7118 u64 efer; 7119 7120 if (cpu_has_efer_nx()) 7121 efer_reserved_bits &= ~EFER_NX; 7122 7123 if (!ctrl_bit1) { 7124 printf("\"Load-IA32-EFER\" exit control not supported\n"); 7125 goto test_entry_exit_mode; 7126 } 7127 7128 report_prefix_pushf("%s %lx", fld_name, efer_saved); 7129 test_efer_vmlaunch(fld, true); 7130 report_prefix_pop(); 7131 7132 /* 7133 * Check reserved bits 7134 */ 7135 vmcs_write(ctrl_fld, ctrl_saved & ~ctrl_bit1); 7136 for (i = 0; i < 64; i++) { 7137 if ((1ull << i) & efer_reserved_bits) { 7138 efer = efer_saved | (1ull << i); 7139 vmcs_write(fld, efer); 7140 report_prefix_pushf("%s %lx", fld_name, efer); 7141 test_efer_vmlaunch(fld, true); 7142 report_prefix_pop(); 7143 } 7144 } 7145 7146 vmcs_write(ctrl_fld, ctrl_saved | ctrl_bit1); 7147 for (i = 0; i < 64; i++) { 7148 if ((1ull << i) & efer_reserved_bits) { 7149 efer = efer_saved | (1ull << i); 7150 vmcs_write(fld, efer); 7151 report_prefix_pushf("%s %lx", fld_name, efer); 7152 test_efer_vmlaunch(fld, false); 7153 report_prefix_pop(); 7154 } 7155 } 7156 7157 vmcs_write(ctrl_fld, ctrl_saved); 7158 vmcs_write(fld, efer_saved); 7159 7160 /* 7161 * Check LMA and LME bits 7162 */ 7163 test_efer_bit(fld, fld_name, 7164 ctrl_fld, ctrl_bit1, 7165 EFER_LMA, 7166 "EFER_LMA"); 7167 test_efer_bit(fld, fld_name, 7168 ctrl_fld, ctrl_bit1, 7169 EFER_LME, 7170 "EFER_LME"); 7171 7172 test_entry_exit_mode: 7173 test_efer_bit(fld, fld_name, 7174 ctrl_fld, ctrl_bit2, 7175 EFER_LMA, 7176 "EFER_LMA"); 7177 test_efer_bit(fld, fld_name, 7178 ctrl_fld, ctrl_bit2, 7179 EFER_LME, 7180 "EFER_LME"); 7181 } 7182 7183 /* 7184 * If the 'load IA32_EFER' VM-exit control is 1, bits reserved in the 7185 * IA32_EFER MSR must be 0 in the field for that register. In addition, 7186 * the values of the LMA and LME bits in the field must each be that of 7187 * the 'host address-space size' VM-exit control. 7188 * 7189 * [Intel SDM] 7190 */ 7191 static void test_host_efer(void) 7192 { 7193 test_efer(HOST_EFER, "HOST_EFER", EXI_CONTROLS, 7194 ctrl_exit_rev.clr & EXI_LOAD_EFER, 7195 EXI_HOST_64); 7196 } 7197 7198 /* 7199 * If the 'load IA32_EFER' VM-enter control is 1, bits reserved in the 7200 * IA32_EFER MSR must be 0 in the field for that register. In addition, 7201 * the values of the LMA and LME bits in the field must each be that of 7202 * the 'IA32e-mode guest' VM-exit control. 7203 */ 7204 static void test_guest_efer(void) 7205 { 7206 if (!(ctrl_enter_rev.clr & ENT_LOAD_EFER)) { 7207 printf("\"Load-IA32-EFER\" entry control not supported\n"); 7208 return; 7209 } 7210 7211 vmcs_write(GUEST_EFER, rdmsr(MSR_EFER)); 7212 test_efer(GUEST_EFER, "GUEST_EFER", ENT_CONTROLS, 7213 ctrl_enter_rev.clr & ENT_LOAD_EFER, 7214 ENT_GUEST_64); 7215 } 7216 7217 /* 7218 * PAT values higher than 8 are uninteresting since they're likely lumped 7219 * in with "8". We only test values above 8 one bit at a time, 7220 * in order to reduce the number of VM-Entries and keep the runtime reasonable. 7221 */ 7222 #define PAT_VAL_LIMIT 8 7223 7224 static void test_pat(u32 field, const char * field_name, u32 ctrl_field, 7225 u64 ctrl_bit) 7226 { 7227 u32 ctrl_saved = vmcs_read(ctrl_field); 7228 u64 pat_saved = vmcs_read(field); 7229 u64 i, val; 7230 u32 j; 7231 int error; 7232 7233 vmcs_clear_bits(ctrl_field, ctrl_bit); 7234 7235 for (i = 0; i < 256; i = (i < PAT_VAL_LIMIT) ? i + 1 : i * 2) { 7236 /* Test PAT0..PAT7 fields */ 7237 for (j = 0; j < (i ? 8 : 1); j++) { 7238 val = i << j * 8; 7239 vmcs_write(field, val); 7240 if (field == HOST_PAT) { 7241 report_prefix_pushf("%s %lx", field_name, val); 7242 test_vmx_vmlaunch(0); 7243 report_prefix_pop(); 7244 7245 } else { // GUEST_PAT 7246 test_guest_state("ENT_LOAD_PAT enabled", false, 7247 val, "GUEST_PAT"); 7248 } 7249 } 7250 } 7251 7252 vmcs_set_bits(ctrl_field, ctrl_bit); 7253 for (i = 0; i < 256; i = (i < PAT_VAL_LIMIT) ? i + 1 : i * 2) { 7254 /* Test PAT0..PAT7 fields */ 7255 for (j = 0; j < (i ? 8 : 1); j++) { 7256 val = i << j * 8; 7257 vmcs_write(field, val); 7258 7259 if (field == HOST_PAT) { 7260 report_prefix_pushf("%s %lx", field_name, val); 7261 if (i == 0x2 || i == 0x3 || i >= 0x8) 7262 error = 7263 VMXERR_ENTRY_INVALID_HOST_STATE_FIELD; 7264 else 7265 error = 0; 7266 7267 test_vmx_vmlaunch(error); 7268 report_prefix_pop(); 7269 7270 } else { // GUEST_PAT 7271 error = (i == 0x2 || i == 0x3 || i >= 0x8); 7272 test_guest_state("ENT_LOAD_PAT enabled", !!error, 7273 val, "GUEST_PAT"); 7274 } 7275 7276 } 7277 } 7278 7279 vmcs_write(ctrl_field, ctrl_saved); 7280 vmcs_write(field, pat_saved); 7281 } 7282 7283 /* 7284 * If the "load IA32_PAT" VM-exit control is 1, the value of the field 7285 * for the IA32_PAT MSR must be one that could be written by WRMSR 7286 * without fault at CPL 0. Specifically, each of the 8 bytes in the 7287 * field must have one of the values 0 (UC), 1 (WC), 4 (WT), 5 (WP), 7288 * 6 (WB), or 7 (UC-). 7289 * 7290 * [Intel SDM] 7291 */ 7292 static void test_load_host_pat(void) 7293 { 7294 /* 7295 * "load IA32_PAT" VM-exit control 7296 */ 7297 if (!(ctrl_exit_rev.clr & EXI_LOAD_PAT)) { 7298 printf("\"Load-IA32-PAT\" exit control not supported\n"); 7299 return; 7300 } 7301 7302 test_pat(HOST_PAT, "HOST_PAT", EXI_CONTROLS, EXI_LOAD_PAT); 7303 } 7304 7305 union cpuidA_eax { 7306 struct { 7307 unsigned int version_id:8; 7308 unsigned int num_counters_gp:8; 7309 unsigned int bit_width:8; 7310 unsigned int mask_length:8; 7311 } split; 7312 unsigned int full; 7313 }; 7314 7315 union cpuidA_edx { 7316 struct { 7317 unsigned int num_counters_fixed:5; 7318 unsigned int bit_width_fixed:8; 7319 unsigned int reserved:9; 7320 } split; 7321 unsigned int full; 7322 }; 7323 7324 static bool valid_pgc(u64 val) 7325 { 7326 struct cpuid id; 7327 union cpuidA_eax eax; 7328 union cpuidA_edx edx; 7329 u64 mask; 7330 7331 id = cpuid(0xA); 7332 eax.full = id.a; 7333 edx.full = id.d; 7334 mask = ~(((1ull << eax.split.num_counters_gp) - 1) | 7335 (((1ull << edx.split.num_counters_fixed) - 1) << 32)); 7336 7337 return !(val & mask); 7338 } 7339 7340 static void test_pgc_vmlaunch(u32 xerror, u32 xreason, bool xfail, bool host) 7341 { 7342 u32 inst_err; 7343 u64 obs; 7344 bool success; 7345 struct vmx_state_area_test_data *data = &vmx_state_area_test_data; 7346 7347 if (host) { 7348 success = vmlaunch_succeeds(); 7349 obs = rdmsr(data->msr); 7350 if (!success) { 7351 inst_err = vmcs_read(VMX_INST_ERROR); 7352 report(xerror == inst_err, "vmlaunch failed, " 7353 "VMX Inst Error is %d (expected %d)", 7354 inst_err, xerror); 7355 } else { 7356 report(!data->enabled || data->exp == obs, 7357 "Host state is 0x%lx (expected 0x%lx)", 7358 obs, data->exp); 7359 report(success != xfail, "vmlaunch succeeded"); 7360 } 7361 } else { 7362 test_guest_state("load GUEST_PERF_GLOBAL_CTRL", xfail, 7363 GUEST_PERF_GLOBAL_CTRL, 7364 "GUEST_PERF_GLOBAL_CTRL"); 7365 } 7366 } 7367 7368 /* 7369 * test_load_perf_global_ctrl is a generic function for testing the 7370 * "load IA32_PERF_GLOBAL_CTRL" VM-{Entry,Exit} controls. This test function 7371 * tests the provided ctrl_val when disabled and enabled. 7372 * 7373 * @nr: VMCS field number corresponding to the host/guest state field 7374 * @name: Name of the above VMCS field for printing in test report 7375 * @ctrl_nr: VMCS field number corresponding to the VM-{Entry,Exit} control 7376 * @ctrl_val: Bit to set on the ctrl_field 7377 */ 7378 static void test_perf_global_ctrl(u32 nr, const char *name, u32 ctrl_nr, 7379 const char *ctrl_name, u64 ctrl_val) 7380 { 7381 u64 ctrl_saved = vmcs_read(ctrl_nr); 7382 u64 pgc_saved = vmcs_read(nr); 7383 u64 i, val; 7384 bool host = nr == HOST_PERF_GLOBAL_CTRL; 7385 struct vmx_state_area_test_data *data = &vmx_state_area_test_data; 7386 7387 data->msr = MSR_CORE_PERF_GLOBAL_CTRL; 7388 msr_bmp_init(); 7389 vmcs_write(ctrl_nr, ctrl_saved & ~ctrl_val); 7390 data->enabled = false; 7391 report_prefix_pushf("\"load IA32_PERF_GLOBAL_CTRL\"=0 on %s", 7392 ctrl_name); 7393 7394 for (i = 0; i < 64; i++) { 7395 val = 1ull << i; 7396 vmcs_write(nr, val); 7397 report_prefix_pushf("%s = 0x%lx", name, val); 7398 test_pgc_vmlaunch(0, VMX_VMCALL, false, host); 7399 report_prefix_pop(); 7400 } 7401 report_prefix_pop(); 7402 7403 vmcs_write(ctrl_nr, ctrl_saved | ctrl_val); 7404 data->enabled = true; 7405 report_prefix_pushf("\"load IA32_PERF_GLOBAL_CTRL\"=1 on %s", 7406 ctrl_name); 7407 for (i = 0; i < 64; i++) { 7408 val = 1ull << i; 7409 data->exp = val; 7410 vmcs_write(nr, val); 7411 report_prefix_pushf("%s = 0x%lx", name, val); 7412 if (valid_pgc(val)) { 7413 test_pgc_vmlaunch(0, VMX_VMCALL, false, host); 7414 } else { 7415 if (host) 7416 test_pgc_vmlaunch( 7417 VMXERR_ENTRY_INVALID_HOST_STATE_FIELD, 7418 0, 7419 true, 7420 host); 7421 else 7422 test_pgc_vmlaunch( 7423 0, 7424 VMX_ENTRY_FAILURE | VMX_FAIL_STATE, 7425 true, 7426 host); 7427 } 7428 report_prefix_pop(); 7429 } 7430 7431 data->enabled = false; 7432 report_prefix_pop(); 7433 vmcs_write(ctrl_nr, ctrl_saved); 7434 vmcs_write(nr, pgc_saved); 7435 } 7436 7437 static void test_load_host_perf_global_ctrl(void) 7438 { 7439 if (!(ctrl_exit_rev.clr & EXI_LOAD_PERF)) { 7440 printf("\"load IA32_PERF_GLOBAL_CTRL\" exit control not supported\n"); 7441 return; 7442 } 7443 7444 test_perf_global_ctrl(HOST_PERF_GLOBAL_CTRL, "HOST_PERF_GLOBAL_CTRL", 7445 EXI_CONTROLS, "EXI_CONTROLS", EXI_LOAD_PERF); 7446 } 7447 7448 7449 static void test_load_guest_perf_global_ctrl(void) 7450 { 7451 if (!(ctrl_enter_rev.clr & ENT_LOAD_PERF)) { 7452 printf("\"load IA32_PERF_GLOBAL_CTRL\" entry control not supported\n"); 7453 return; 7454 } 7455 7456 test_perf_global_ctrl(GUEST_PERF_GLOBAL_CTRL, "GUEST_PERF_GLOBAL_CTRL", 7457 ENT_CONTROLS, "ENT_CONTROLS", ENT_LOAD_PERF); 7458 } 7459 7460 7461 /* 7462 * test_vmcs_field - test a value for the given VMCS field 7463 * @field: VMCS field 7464 * @field_name: string name of VMCS field 7465 * @bit_start: starting bit 7466 * @bit_end: ending bit 7467 * @val: value that the bit range must or must not contain 7468 * @valid_val: whether value given in 'val' must be valid or not 7469 * @error: expected VMCS error when vmentry fails for an invalid value 7470 */ 7471 static void test_vmcs_field(u64 field, const char *field_name, u32 bit_start, 7472 u32 bit_end, u64 val, bool valid_val, u32 error) 7473 { 7474 u64 field_saved = vmcs_read(field); 7475 u32 i; 7476 u64 tmp; 7477 u32 bit_on; 7478 u64 mask = ~0ull; 7479 7480 mask = (mask >> bit_end) << bit_end; 7481 mask = mask | ((1 << bit_start) - 1); 7482 tmp = (field_saved & mask) | (val << bit_start); 7483 7484 vmcs_write(field, tmp); 7485 report_prefix_pushf("%s %lx", field_name, tmp); 7486 if (valid_val) 7487 test_vmx_vmlaunch(0); 7488 else 7489 test_vmx_vmlaunch(error); 7490 report_prefix_pop(); 7491 7492 for (i = bit_start; i <= bit_end; i = i + 2) { 7493 bit_on = ((1ull < i) & (val << bit_start)) ? 0 : 1; 7494 if (bit_on) 7495 tmp = field_saved | (1ull << i); 7496 else 7497 tmp = field_saved & ~(1ull << i); 7498 vmcs_write(field, tmp); 7499 report_prefix_pushf("%s %lx", field_name, tmp); 7500 if (valid_val) 7501 test_vmx_vmlaunch(error); 7502 else 7503 test_vmx_vmlaunch(0); 7504 report_prefix_pop(); 7505 } 7506 7507 vmcs_write(field, field_saved); 7508 } 7509 7510 static void test_canonical(u64 field, const char * field_name, bool host) 7511 { 7512 u64 addr_saved = vmcs_read(field); 7513 7514 /* 7515 * Use the existing value if possible. Writing a random canonical 7516 * value is not an option as doing so would corrupt the field being 7517 * tested and likely hose the test. 7518 */ 7519 if (is_canonical(addr_saved)) { 7520 if (host) { 7521 report_prefix_pushf("%s %lx", field_name, addr_saved); 7522 test_vmx_vmlaunch(0); 7523 report_prefix_pop(); 7524 } else { 7525 test_guest_state("Test canonical address", false, 7526 addr_saved, field_name); 7527 } 7528 } 7529 7530 vmcs_write(field, NONCANONICAL); 7531 7532 if (host) { 7533 report_prefix_pushf("%s %llx", field_name, NONCANONICAL); 7534 test_vmx_vmlaunch(VMXERR_ENTRY_INVALID_HOST_STATE_FIELD); 7535 report_prefix_pop(); 7536 } else { 7537 test_guest_state("Test non-canonical address", true, 7538 NONCANONICAL, field_name); 7539 } 7540 7541 vmcs_write(field, addr_saved); 7542 } 7543 7544 #define TEST_RPL_TI_FLAGS(reg, name) \ 7545 test_vmcs_field(reg, name, 0, 2, 0x0, true, \ 7546 VMXERR_ENTRY_INVALID_HOST_STATE_FIELD); 7547 7548 #define TEST_CS_TR_FLAGS(reg, name) \ 7549 test_vmcs_field(reg, name, 3, 15, 0x0000, false, \ 7550 VMXERR_ENTRY_INVALID_HOST_STATE_FIELD); 7551 7552 /* 7553 * 1. In the selector field for each of CS, SS, DS, ES, FS, GS and TR, the 7554 * RPL (bits 1:0) and the TI flag (bit 2) must be 0. 7555 * 2. The selector fields for CS and TR cannot be 0000H. 7556 * 3. The selector field for SS cannot be 0000H if the "host address-space 7557 * size" VM-exit control is 0. 7558 * 4. On processors that support Intel 64 architecture, the base-address 7559 * fields for FS, GS and TR must contain canonical addresses. 7560 */ 7561 static void test_host_segment_regs(void) 7562 { 7563 u16 selector_saved; 7564 7565 /* 7566 * Test RPL and TI flags 7567 */ 7568 TEST_RPL_TI_FLAGS(HOST_SEL_CS, "HOST_SEL_CS"); 7569 TEST_RPL_TI_FLAGS(HOST_SEL_SS, "HOST_SEL_SS"); 7570 TEST_RPL_TI_FLAGS(HOST_SEL_DS, "HOST_SEL_DS"); 7571 TEST_RPL_TI_FLAGS(HOST_SEL_ES, "HOST_SEL_ES"); 7572 TEST_RPL_TI_FLAGS(HOST_SEL_FS, "HOST_SEL_FS"); 7573 TEST_RPL_TI_FLAGS(HOST_SEL_GS, "HOST_SEL_GS"); 7574 TEST_RPL_TI_FLAGS(HOST_SEL_TR, "HOST_SEL_TR"); 7575 7576 /* 7577 * Test that CS and TR fields can not be 0x0000 7578 */ 7579 TEST_CS_TR_FLAGS(HOST_SEL_CS, "HOST_SEL_CS"); 7580 TEST_CS_TR_FLAGS(HOST_SEL_TR, "HOST_SEL_TR"); 7581 7582 /* 7583 * SS field can not be 0x0000 if "host address-space size" VM-exit 7584 * control is 0 7585 */ 7586 selector_saved = vmcs_read(HOST_SEL_SS); 7587 vmcs_write(HOST_SEL_SS, 0); 7588 report_prefix_pushf("HOST_SEL_SS 0"); 7589 if (vmcs_read(EXI_CONTROLS) & EXI_HOST_64) { 7590 test_vmx_vmlaunch(0); 7591 } else { 7592 test_vmx_vmlaunch(VMXERR_ENTRY_INVALID_HOST_STATE_FIELD); 7593 } 7594 report_prefix_pop(); 7595 7596 vmcs_write(HOST_SEL_SS, selector_saved); 7597 7598 #ifdef __x86_64__ 7599 /* 7600 * Base address for FS, GS and TR must be canonical 7601 */ 7602 test_canonical(HOST_BASE_FS, "HOST_BASE_FS", true); 7603 test_canonical(HOST_BASE_GS, "HOST_BASE_GS", true); 7604 test_canonical(HOST_BASE_TR, "HOST_BASE_TR", true); 7605 #endif 7606 } 7607 7608 /* 7609 * On processors that support Intel 64 architecture, the base-address 7610 * fields for GDTR and IDTR must contain canonical addresses. 7611 */ 7612 static void test_host_desc_tables(void) 7613 { 7614 #ifdef __x86_64__ 7615 test_canonical(HOST_BASE_GDTR, "HOST_BASE_GDTR", true); 7616 test_canonical(HOST_BASE_IDTR, "HOST_BASE_IDTR", true); 7617 #endif 7618 } 7619 7620 /* 7621 * If the "host address-space size" VM-exit control is 0, the following must 7622 * hold: 7623 * - The "IA-32e mode guest" VM-entry control is 0. 7624 * - Bit 17 of the CR4 field (corresponding to CR4.PCIDE) is 0. 7625 * - Bits 63:32 in the RIP field are 0. 7626 * 7627 * If the "host address-space size" VM-exit control is 1, the following must 7628 * hold: 7629 * - Bit 5 of the CR4 field (corresponding to CR4.PAE) is 1. 7630 * - The RIP field contains a canonical address. 7631 * 7632 */ 7633 static void test_host_addr_size(void) 7634 { 7635 u64 cr4_saved = vmcs_read(HOST_CR4); 7636 u64 rip_saved = vmcs_read(HOST_RIP); 7637 u64 entry_ctrl_saved = vmcs_read(ENT_CONTROLS); 7638 int i; 7639 u64 tmp; 7640 7641 if (vmcs_read(EXI_CONTROLS) & EXI_HOST_64) { 7642 vmcs_write(ENT_CONTROLS, entry_ctrl_saved | ENT_GUEST_64); 7643 report_prefix_pushf("\"IA-32e mode guest\" enabled"); 7644 test_vmx_vmlaunch(0); 7645 report_prefix_pop(); 7646 7647 vmcs_write(HOST_CR4, cr4_saved | X86_CR4_PCIDE); 7648 report_prefix_pushf("\"CR4.PCIDE\" set"); 7649 test_vmx_vmlaunch(0); 7650 report_prefix_pop(); 7651 7652 for (i = 32; i <= 63; i = i + 4) { 7653 tmp = rip_saved | 1ull << i; 7654 vmcs_write(HOST_RIP, tmp); 7655 report_prefix_pushf("HOST_RIP %lx", tmp); 7656 test_vmx_vmlaunch(0); 7657 report_prefix_pop(); 7658 } 7659 7660 if (cr4_saved & X86_CR4_PAE) { 7661 vmcs_write(HOST_CR4, cr4_saved & ~X86_CR4_PAE); 7662 report_prefix_pushf("\"CR4.PAE\" unset"); 7663 test_vmx_vmlaunch(VMXERR_ENTRY_INVALID_HOST_STATE_FIELD); 7664 } else { 7665 report_prefix_pushf("\"CR4.PAE\" set"); 7666 test_vmx_vmlaunch(0); 7667 } 7668 report_prefix_pop(); 7669 7670 vmcs_write(HOST_RIP, NONCANONICAL); 7671 report_prefix_pushf("HOST_RIP %llx", NONCANONICAL); 7672 test_vmx_vmlaunch(VMXERR_ENTRY_INVALID_HOST_STATE_FIELD); 7673 report_prefix_pop(); 7674 7675 vmcs_write(ENT_CONTROLS, entry_ctrl_saved | ENT_GUEST_64); 7676 vmcs_write(HOST_RIP, rip_saved); 7677 vmcs_write(HOST_CR4, cr4_saved); 7678 } 7679 } 7680 7681 /* 7682 * Check that the virtual CPU checks the VMX Host State Area as 7683 * documented in the Intel SDM. 7684 */ 7685 static void vmx_host_state_area_test(void) 7686 { 7687 /* 7688 * Bit 1 of the guest's RFLAGS must be 1, or VM-entry will 7689 * fail due to invalid guest state, should we make it that 7690 * far. 7691 */ 7692 vmcs_write(GUEST_RFLAGS, 0); 7693 7694 test_host_ctl_regs(); 7695 7696 test_canonical(HOST_SYSENTER_ESP, "HOST_SYSENTER_ESP", true); 7697 test_canonical(HOST_SYSENTER_EIP, "HOST_SYSENTER_EIP", true); 7698 7699 test_host_efer(); 7700 test_load_host_pat(); 7701 test_host_segment_regs(); 7702 test_host_desc_tables(); 7703 test_host_addr_size(); 7704 test_load_host_perf_global_ctrl(); 7705 } 7706 7707 /* 7708 * If the "load debug controls" VM-entry control is 1, bits 63:32 in 7709 * the DR7 field must be 0. 7710 * 7711 * [Intel SDM] 7712 */ 7713 static void test_guest_dr7(void) 7714 { 7715 u32 ent_saved = vmcs_read(ENT_CONTROLS); 7716 u64 dr7_saved = vmcs_read(GUEST_DR7); 7717 u64 val; 7718 int i; 7719 7720 if (ctrl_enter_rev.set & ENT_LOAD_DBGCTLS) { 7721 vmcs_clear_bits(ENT_CONTROLS, ENT_LOAD_DBGCTLS); 7722 for (i = 0; i < 64; i++) { 7723 val = 1ull << i; 7724 vmcs_write(GUEST_DR7, val); 7725 test_guest_state("ENT_LOAD_DBGCTLS disabled", false, 7726 val, "GUEST_DR7"); 7727 } 7728 } 7729 if (ctrl_enter_rev.clr & ENT_LOAD_DBGCTLS) { 7730 vmcs_set_bits(ENT_CONTROLS, ENT_LOAD_DBGCTLS); 7731 for (i = 0; i < 64; i++) { 7732 val = 1ull << i; 7733 vmcs_write(GUEST_DR7, val); 7734 test_guest_state("ENT_LOAD_DBGCTLS enabled", i >= 32, 7735 val, "GUEST_DR7"); 7736 } 7737 } 7738 vmcs_write(GUEST_DR7, dr7_saved); 7739 vmcs_write(ENT_CONTROLS, ent_saved); 7740 } 7741 7742 /* 7743 * If the "load IA32_PAT" VM-entry control is 1, the value of the field 7744 * for the IA32_PAT MSR must be one that could be written by WRMSR 7745 * without fault at CPL 0. Specifically, each of the 8 bytes in the 7746 * field must have one of the values 0 (UC), 1 (WC), 4 (WT), 5 (WP), 7747 * 6 (WB), or 7 (UC-). 7748 * 7749 * [Intel SDM] 7750 */ 7751 static void test_load_guest_pat(void) 7752 { 7753 /* 7754 * "load IA32_PAT" VM-entry control 7755 */ 7756 if (!(ctrl_enter_rev.clr & ENT_LOAD_PAT)) { 7757 printf("\"Load-IA32-PAT\" entry control not supported\n"); 7758 return; 7759 } 7760 7761 test_pat(GUEST_PAT, "GUEST_PAT", ENT_CONTROLS, ENT_LOAD_PAT); 7762 } 7763 7764 #define MSR_IA32_BNDCFGS_RSVD_MASK 0x00000ffc 7765 7766 /* 7767 * If the “load IA32_BNDCFGS†VM-entry control is 1, the following 7768 * checks are performed on the field for the IA32_BNDCFGS MSR: 7769 * 7770 * — Bits reserved in the IA32_BNDCFGS MSR must be 0. 7771 * — The linear address in bits 63:12 must be canonical. 7772 * 7773 * [Intel SDM] 7774 */ 7775 static void test_load_guest_bndcfgs(void) 7776 { 7777 u64 bndcfgs_saved = vmcs_read(GUEST_BNDCFGS); 7778 u64 bndcfgs; 7779 7780 if (!(ctrl_enter_rev.clr & ENT_LOAD_BNDCFGS)) { 7781 printf("\"Load-IA32-BNDCFGS\" entry control not supported\n"); 7782 return; 7783 } 7784 7785 vmcs_clear_bits(ENT_CONTROLS, ENT_LOAD_BNDCFGS); 7786 7787 vmcs_write(GUEST_BNDCFGS, NONCANONICAL); 7788 test_guest_state("ENT_LOAD_BNDCFGS disabled", false, 7789 GUEST_BNDCFGS, "GUEST_BNDCFGS"); 7790 bndcfgs = bndcfgs_saved | MSR_IA32_BNDCFGS_RSVD_MASK; 7791 vmcs_write(GUEST_BNDCFGS, bndcfgs); 7792 test_guest_state("ENT_LOAD_BNDCFGS disabled", false, 7793 GUEST_BNDCFGS, "GUEST_BNDCFGS"); 7794 7795 vmcs_set_bits(ENT_CONTROLS, ENT_LOAD_BNDCFGS); 7796 7797 vmcs_write(GUEST_BNDCFGS, NONCANONICAL); 7798 test_guest_state("ENT_LOAD_BNDCFGS enabled", true, 7799 GUEST_BNDCFGS, "GUEST_BNDCFGS"); 7800 bndcfgs = bndcfgs_saved | MSR_IA32_BNDCFGS_RSVD_MASK; 7801 vmcs_write(GUEST_BNDCFGS, bndcfgs); 7802 test_guest_state("ENT_LOAD_BNDCFGS enabled", true, 7803 GUEST_BNDCFGS, "GUEST_BNDCFGS"); 7804 7805 vmcs_write(GUEST_BNDCFGS, bndcfgs_saved); 7806 } 7807 7808 /* 7809 * Check that the virtual CPU checks the VMX Guest State Area as 7810 * documented in the Intel SDM. 7811 */ 7812 static void vmx_guest_state_area_test(void) 7813 { 7814 vmx_set_test_stage(1); 7815 test_set_guest(guest_state_test_main); 7816 7817 /* 7818 * The IA32_SYSENTER_ESP field and the IA32_SYSENTER_EIP field 7819 * must each contain a canonical address. 7820 */ 7821 test_canonical(GUEST_SYSENTER_ESP, "GUEST_SYSENTER_ESP", false); 7822 test_canonical(GUEST_SYSENTER_EIP, "GUEST_SYSENTER_EIP", false); 7823 7824 test_guest_dr7(); 7825 test_load_guest_pat(); 7826 test_guest_efer(); 7827 test_load_guest_perf_global_ctrl(); 7828 test_load_guest_bndcfgs(); 7829 7830 /* 7831 * Let the guest finish execution 7832 */ 7833 vmx_set_test_stage(2); 7834 enter_guest(); 7835 } 7836 7837 static bool valid_vmcs_for_vmentry(void) 7838 { 7839 struct vmcs *current_vmcs = NULL; 7840 7841 if (vmcs_save(¤t_vmcs)) 7842 return false; 7843 7844 return current_vmcs && !current_vmcs->hdr.shadow_vmcs; 7845 } 7846 7847 static void try_vmentry_in_movss_shadow(void) 7848 { 7849 u32 vm_inst_err; 7850 u32 flags; 7851 bool early_failure = false; 7852 u32 expected_flags = X86_EFLAGS_FIXED; 7853 bool valid_vmcs = valid_vmcs_for_vmentry(); 7854 7855 expected_flags |= valid_vmcs ? X86_EFLAGS_ZF : X86_EFLAGS_CF; 7856 7857 /* 7858 * Indirectly set VM_INST_ERR to 12 ("VMREAD/VMWRITE from/to 7859 * unsupported VMCS component"). 7860 */ 7861 vmcs_write(~0u, 0); 7862 7863 __asm__ __volatile__ ("mov %[host_rsp], %%edx;" 7864 "vmwrite %%rsp, %%rdx;" 7865 "mov 0f, %%rax;" 7866 "mov %[host_rip], %%edx;" 7867 "vmwrite %%rax, %%rdx;" 7868 "mov $-1, %%ah;" 7869 "sahf;" 7870 "mov %%ss, %%ax;" 7871 "mov %%ax, %%ss;" 7872 "vmlaunch;" 7873 "mov $1, %[early_failure];" 7874 "0: lahf;" 7875 "movzbl %%ah, %[flags]" 7876 : [early_failure] "+r" (early_failure), 7877 [flags] "=&a" (flags) 7878 : [host_rsp] "i" (HOST_RSP), 7879 [host_rip] "i" (HOST_RIP) 7880 : "rdx", "cc", "memory"); 7881 vm_inst_err = vmcs_read(VMX_INST_ERROR); 7882 7883 report(early_failure, "Early VM-entry failure"); 7884 report(flags == expected_flags, "RFLAGS[8:0] is %x (actual %x)", 7885 expected_flags, flags); 7886 if (valid_vmcs) 7887 report(vm_inst_err == VMXERR_ENTRY_EVENTS_BLOCKED_BY_MOV_SS, 7888 "VM-instruction error is %d (actual %d)", 7889 VMXERR_ENTRY_EVENTS_BLOCKED_BY_MOV_SS, vm_inst_err); 7890 } 7891 7892 static void vmentry_movss_shadow_test(void) 7893 { 7894 struct vmcs *orig_vmcs; 7895 7896 TEST_ASSERT(!vmcs_save(&orig_vmcs)); 7897 7898 /* 7899 * Set the launched flag on the current VMCS to verify the correct 7900 * error priority, below. 7901 */ 7902 test_set_guest(v2_null_test_guest); 7903 enter_guest(); 7904 7905 /* 7906 * With bit 1 of the guest's RFLAGS clear, VM-entry should 7907 * fail due to invalid guest state (if we make it that far). 7908 */ 7909 vmcs_write(GUEST_RFLAGS, 0); 7910 7911 /* 7912 * "VM entry with events blocked by MOV SS" takes precedence over 7913 * "VMLAUNCH with non-clear VMCS." 7914 */ 7915 report_prefix_push("valid current-VMCS"); 7916 try_vmentry_in_movss_shadow(); 7917 report_prefix_pop(); 7918 7919 /* 7920 * VMfailInvalid takes precedence over "VM entry with events 7921 * blocked by MOV SS." 7922 */ 7923 TEST_ASSERT(!vmcs_clear(orig_vmcs)); 7924 report_prefix_push("no current-VMCS"); 7925 try_vmentry_in_movss_shadow(); 7926 report_prefix_pop(); 7927 7928 TEST_ASSERT(!make_vmcs_current(orig_vmcs)); 7929 vmcs_write(GUEST_RFLAGS, X86_EFLAGS_FIXED); 7930 } 7931 7932 static void vmx_cr_load_test(void) 7933 { 7934 unsigned long cr3, cr4, orig_cr3, orig_cr4; 7935 7936 orig_cr4 = read_cr4(); 7937 orig_cr3 = read_cr3(); 7938 7939 if (!this_cpu_has(X86_FEATURE_PCID)) { 7940 report_skip("PCID not detected"); 7941 return; 7942 } 7943 if (!this_cpu_has(X86_FEATURE_MCE)) { 7944 report_skip("MCE not detected"); 7945 return; 7946 } 7947 7948 TEST_ASSERT(!(orig_cr3 & X86_CR3_PCID_MASK)); 7949 7950 /* Enable PCID for L1. */ 7951 cr4 = orig_cr4 | X86_CR4_PCIDE; 7952 cr3 = orig_cr3 | 0x1; 7953 TEST_ASSERT(!write_cr4_checking(cr4)); 7954 write_cr3(cr3); 7955 7956 test_set_guest(v2_null_test_guest); 7957 vmcs_write(HOST_CR4, cr4); 7958 vmcs_write(HOST_CR3, cr3); 7959 enter_guest(); 7960 7961 /* 7962 * No exception is expected. 7963 * 7964 * NB. KVM loads the last guest write to CR4 into CR4 read 7965 * shadow. In order to trigger an exit to KVM, we can toggle a 7966 * bit that is owned by KVM. We use CR4.MCE, which shall 7967 * have no side effect because normally no guest MCE (e.g., as the 7968 * result of bad memory) would happen during this test. 7969 */ 7970 TEST_ASSERT(!write_cr4_checking(cr4 ^ X86_CR4_MCE)); 7971 7972 /* Cleanup L1 state. */ 7973 write_cr3(orig_cr3); 7974 TEST_ASSERT(!write_cr4_checking(orig_cr4)); 7975 } 7976 7977 static void vmx_nm_test_guest(void) 7978 { 7979 write_cr0(read_cr0() | X86_CR0_TS); 7980 asm volatile("fnop"); 7981 } 7982 7983 static void check_nm_exit(const char *test) 7984 { 7985 u32 reason = vmcs_read(EXI_REASON); 7986 u32 intr_info = vmcs_read(EXI_INTR_INFO); 7987 const u32 expected = INTR_INFO_VALID_MASK | INTR_TYPE_HARD_EXCEPTION | 7988 NM_VECTOR; 7989 7990 report(reason == VMX_EXC_NMI && intr_info == expected, "%s", test); 7991 } 7992 7993 /* 7994 * This test checks that: 7995 * 7996 * (a) If L2 launches with CR0.TS clear, but later sets CR0.TS, then 7997 * a subsequent #NM VM-exit is reflected to L1. 7998 * 7999 * (b) If L2 launches with CR0.TS clear and CR0.EM set, then a 8000 * subsequent #NM VM-exit is reflected to L1. 8001 */ 8002 static void vmx_nm_test(void) 8003 { 8004 unsigned long cr0 = read_cr0(); 8005 8006 test_set_guest(vmx_nm_test_guest); 8007 8008 /* 8009 * L1 wants to intercept #NM exceptions encountered in L2. 8010 */ 8011 vmcs_write(EXC_BITMAP, 1 << NM_VECTOR); 8012 8013 /* 8014 * Launch L2 with CR0.TS clear, but don't claim host ownership of 8015 * any CR0 bits. L2 will set CR0.TS and then try to execute fnop, 8016 * which will raise #NM. L0 should reflect the #NM VM-exit to L1. 8017 */ 8018 vmcs_write(CR0_MASK, 0); 8019 vmcs_write(GUEST_CR0, cr0 & ~X86_CR0_TS); 8020 enter_guest(); 8021 check_nm_exit("fnop with CR0.TS set in L2 triggers #NM VM-exit to L1"); 8022 8023 /* 8024 * Re-enter L2 at the fnop instruction, with CR0.TS clear but 8025 * CR0.EM set. The fnop will still raise #NM, and L0 should 8026 * reflect the #NM VM-exit to L1. 8027 */ 8028 vmcs_write(GUEST_CR0, (cr0 & ~X86_CR0_TS) | X86_CR0_EM); 8029 enter_guest(); 8030 check_nm_exit("fnop with CR0.EM set in L2 triggers #NM VM-exit to L1"); 8031 8032 /* 8033 * Re-enter L2 at the fnop instruction, with both CR0.TS and 8034 * CR0.EM clear. There will be no #NM, and the L2 guest should 8035 * exit normally. 8036 */ 8037 vmcs_write(GUEST_CR0, cr0 & ~(X86_CR0_TS | X86_CR0_EM)); 8038 enter_guest(); 8039 } 8040 8041 bool vmx_pending_event_ipi_fired; 8042 static void vmx_pending_event_ipi_isr(isr_regs_t *regs) 8043 { 8044 vmx_pending_event_ipi_fired = true; 8045 eoi(); 8046 } 8047 8048 bool vmx_pending_event_guest_run; 8049 static void vmx_pending_event_guest(void) 8050 { 8051 vmcall(); 8052 vmx_pending_event_guest_run = true; 8053 } 8054 8055 static void vmx_pending_event_test_core(bool guest_hlt) 8056 { 8057 int ipi_vector = 0xf1; 8058 8059 vmx_pending_event_ipi_fired = false; 8060 handle_irq(ipi_vector, vmx_pending_event_ipi_isr); 8061 8062 vmx_pending_event_guest_run = false; 8063 test_set_guest(vmx_pending_event_guest); 8064 8065 vmcs_set_bits(PIN_CONTROLS, PIN_EXTINT); 8066 8067 enter_guest(); 8068 skip_exit_vmcall(); 8069 8070 if (guest_hlt) 8071 vmcs_write(GUEST_ACTV_STATE, ACTV_HLT); 8072 8073 irq_disable(); 8074 apic_icr_write(APIC_DEST_SELF | APIC_DEST_PHYSICAL | 8075 APIC_DM_FIXED | ipi_vector, 8076 0); 8077 8078 enter_guest(); 8079 8080 assert_exit_reason(VMX_EXTINT); 8081 report(!vmx_pending_event_guest_run, 8082 "Guest did not run before host received IPI"); 8083 8084 irq_enable(); 8085 asm volatile ("nop"); 8086 irq_disable(); 8087 report(vmx_pending_event_ipi_fired, 8088 "Got pending interrupt after IRQ enabled"); 8089 8090 if (guest_hlt) 8091 vmcs_write(GUEST_ACTV_STATE, ACTV_ACTIVE); 8092 8093 enter_guest(); 8094 report(vmx_pending_event_guest_run, 8095 "Guest finished running when no interrupt"); 8096 } 8097 8098 static void vmx_pending_event_test(void) 8099 { 8100 vmx_pending_event_test_core(false); 8101 } 8102 8103 static void vmx_pending_event_hlt_test(void) 8104 { 8105 vmx_pending_event_test_core(true); 8106 } 8107 8108 static int vmx_window_test_db_count; 8109 8110 static void vmx_window_test_db_handler(struct ex_regs *regs) 8111 { 8112 vmx_window_test_db_count++; 8113 } 8114 8115 static void vmx_nmi_window_test_guest(void) 8116 { 8117 handle_exception(DB_VECTOR, vmx_window_test_db_handler); 8118 8119 asm volatile("vmcall\n\t" 8120 "nop\n\t"); 8121 8122 handle_exception(DB_VECTOR, NULL); 8123 } 8124 8125 static void verify_nmi_window_exit(u64 rip) 8126 { 8127 u32 exit_reason = vmcs_read(EXI_REASON); 8128 8129 report(exit_reason == VMX_NMI_WINDOW, 8130 "Exit reason (%d) is 'NMI window'", exit_reason); 8131 report(vmcs_read(GUEST_RIP) == rip, "RIP (%#lx) is %#lx", 8132 vmcs_read(GUEST_RIP), rip); 8133 vmcs_write(GUEST_ACTV_STATE, ACTV_ACTIVE); 8134 } 8135 8136 static void vmx_nmi_window_test(void) 8137 { 8138 u64 nop_addr; 8139 void *db_fault_addr = get_idt_addr(&boot_idt[DB_VECTOR]); 8140 8141 if (!(ctrl_pin_rev.clr & PIN_VIRT_NMI)) { 8142 report_skip("CPU does not support the \"Virtual NMIs\" VM-execution control."); 8143 return; 8144 } 8145 8146 if (!(ctrl_cpu_rev[0].clr & CPU_NMI_WINDOW)) { 8147 report_skip("CPU does not support the \"NMI-window exiting\" VM-execution control."); 8148 return; 8149 } 8150 8151 vmx_window_test_db_count = 0; 8152 8153 report_prefix_push("NMI-window"); 8154 test_set_guest(vmx_nmi_window_test_guest); 8155 vmcs_set_bits(PIN_CONTROLS, PIN_VIRT_NMI); 8156 enter_guest(); 8157 skip_exit_vmcall(); 8158 nop_addr = vmcs_read(GUEST_RIP); 8159 8160 /* 8161 * Ask for "NMI-window exiting," and expect an immediate VM-exit. 8162 * RIP will not advance. 8163 */ 8164 report_prefix_push("active, no blocking"); 8165 vmcs_set_bits(CPU_EXEC_CTRL0, CPU_NMI_WINDOW); 8166 enter_guest(); 8167 verify_nmi_window_exit(nop_addr); 8168 report_prefix_pop(); 8169 8170 /* 8171 * Ask for "NMI-window exiting" in a MOV-SS shadow, and expect 8172 * a VM-exit on the next instruction after the nop. (The nop 8173 * is one byte.) 8174 */ 8175 report_prefix_push("active, blocking by MOV-SS"); 8176 vmcs_write(GUEST_INTR_STATE, GUEST_INTR_STATE_MOVSS); 8177 enter_guest(); 8178 verify_nmi_window_exit(nop_addr + 1); 8179 report_prefix_pop(); 8180 8181 /* 8182 * Ask for "NMI-window exiting" (with event injection), and 8183 * expect a VM-exit after the event is injected. (RIP should 8184 * be at the address specified in the IDT entry for #DB.) 8185 */ 8186 report_prefix_push("active, no blocking, injecting #DB"); 8187 vmcs_write(ENT_INTR_INFO, 8188 INTR_INFO_VALID_MASK | INTR_TYPE_HARD_EXCEPTION | DB_VECTOR); 8189 enter_guest(); 8190 verify_nmi_window_exit((u64)db_fault_addr); 8191 report_prefix_pop(); 8192 8193 /* 8194 * Ask for "NMI-window exiting" with NMI blocking, and expect 8195 * a VM-exit after the next IRET (i.e. after the #DB handler 8196 * returns). So, RIP should be back at one byte past the nop. 8197 */ 8198 report_prefix_push("active, blocking by NMI"); 8199 vmcs_write(GUEST_INTR_STATE, GUEST_INTR_STATE_NMI); 8200 enter_guest(); 8201 verify_nmi_window_exit(nop_addr + 1); 8202 report(vmx_window_test_db_count == 1, 8203 "#DB handler executed once (actual %d times)", 8204 vmx_window_test_db_count); 8205 report_prefix_pop(); 8206 8207 if (!(rdmsr(MSR_IA32_VMX_MISC) & (1 << 6))) { 8208 report_skip("CPU does not support activity state HLT."); 8209 } else { 8210 /* 8211 * Ask for "NMI-window exiting" when entering activity 8212 * state HLT, and expect an immediate VM-exit. RIP is 8213 * still one byte past the nop. 8214 */ 8215 report_prefix_push("halted, no blocking"); 8216 vmcs_write(GUEST_ACTV_STATE, ACTV_HLT); 8217 enter_guest(); 8218 verify_nmi_window_exit(nop_addr + 1); 8219 report_prefix_pop(); 8220 8221 /* 8222 * Ask for "NMI-window exiting" when entering activity 8223 * state HLT (with event injection), and expect a 8224 * VM-exit after the event is injected. (RIP should be 8225 * at the address specified in the IDT entry for #DB.) 8226 */ 8227 report_prefix_push("halted, no blocking, injecting #DB"); 8228 vmcs_write(GUEST_ACTV_STATE, ACTV_HLT); 8229 vmcs_write(ENT_INTR_INFO, 8230 INTR_INFO_VALID_MASK | INTR_TYPE_HARD_EXCEPTION | 8231 DB_VECTOR); 8232 enter_guest(); 8233 verify_nmi_window_exit((u64)db_fault_addr); 8234 report_prefix_pop(); 8235 } 8236 8237 vmcs_clear_bits(CPU_EXEC_CTRL0, CPU_NMI_WINDOW); 8238 enter_guest(); 8239 report_prefix_pop(); 8240 } 8241 8242 static void vmx_intr_window_test_guest(void) 8243 { 8244 handle_exception(DB_VECTOR, vmx_window_test_db_handler); 8245 8246 /* 8247 * The two consecutive STIs are to ensure that only the first 8248 * one has a shadow. Note that NOP and STI are one byte 8249 * instructions. 8250 */ 8251 asm volatile("vmcall\n\t" 8252 "nop\n\t" 8253 "sti\n\t" 8254 "sti\n\t"); 8255 8256 handle_exception(DB_VECTOR, NULL); 8257 } 8258 8259 static void verify_intr_window_exit(u64 rip) 8260 { 8261 u32 exit_reason = vmcs_read(EXI_REASON); 8262 8263 report(exit_reason == VMX_INTR_WINDOW, 8264 "Exit reason (%d) is 'interrupt window'", exit_reason); 8265 report(vmcs_read(GUEST_RIP) == rip, "RIP (%#lx) is %#lx", 8266 vmcs_read(GUEST_RIP), rip); 8267 vmcs_write(GUEST_ACTV_STATE, ACTV_ACTIVE); 8268 } 8269 8270 static void vmx_intr_window_test(void) 8271 { 8272 u64 vmcall_addr; 8273 u64 nop_addr; 8274 unsigned int orig_db_gate_type; 8275 void *db_fault_addr = get_idt_addr(&boot_idt[DB_VECTOR]); 8276 8277 if (!(ctrl_cpu_rev[0].clr & CPU_INTR_WINDOW)) { 8278 report_skip("CPU does not support the \"interrupt-window exiting\" VM-execution control."); 8279 return; 8280 } 8281 8282 /* 8283 * Change the IDT entry for #DB from interrupt gate to trap gate, 8284 * so that it won't clear RFLAGS.IF. We don't want interrupts to 8285 * be disabled after vectoring a #DB. 8286 */ 8287 orig_db_gate_type = boot_idt[DB_VECTOR].type; 8288 boot_idt[DB_VECTOR].type = 15; 8289 8290 report_prefix_push("interrupt-window"); 8291 test_set_guest(vmx_intr_window_test_guest); 8292 enter_guest(); 8293 assert_exit_reason(VMX_VMCALL); 8294 vmcall_addr = vmcs_read(GUEST_RIP); 8295 8296 /* 8297 * Ask for "interrupt-window exiting" with RFLAGS.IF set and 8298 * no blocking; expect an immediate VM-exit. Note that we have 8299 * not advanced past the vmcall instruction yet, so RIP should 8300 * point to the vmcall instruction. 8301 */ 8302 report_prefix_push("active, no blocking, RFLAGS.IF=1"); 8303 vmcs_set_bits(CPU_EXEC_CTRL0, CPU_INTR_WINDOW); 8304 vmcs_write(GUEST_RFLAGS, X86_EFLAGS_FIXED | X86_EFLAGS_IF); 8305 enter_guest(); 8306 verify_intr_window_exit(vmcall_addr); 8307 report_prefix_pop(); 8308 8309 /* 8310 * Ask for "interrupt-window exiting" (with event injection) 8311 * with RFLAGS.IF set and no blocking; expect a VM-exit after 8312 * the event is injected. That is, RIP should should be at the 8313 * address specified in the IDT entry for #DB. 8314 */ 8315 report_prefix_push("active, no blocking, RFLAGS.IF=1, injecting #DB"); 8316 vmcs_write(ENT_INTR_INFO, 8317 INTR_INFO_VALID_MASK | INTR_TYPE_HARD_EXCEPTION | DB_VECTOR); 8318 vmcall_addr = vmcs_read(GUEST_RIP); 8319 enter_guest(); 8320 verify_intr_window_exit((u64)db_fault_addr); 8321 report_prefix_pop(); 8322 8323 /* 8324 * Let the L2 guest run through the IRET, back to the VMCALL. 8325 * We have to clear the "interrupt-window exiting" 8326 * VM-execution control, or it would just keep causing 8327 * VM-exits. Then, advance past the VMCALL and set the 8328 * "interrupt-window exiting" VM-execution control again. 8329 */ 8330 vmcs_clear_bits(CPU_EXEC_CTRL0, CPU_INTR_WINDOW); 8331 enter_guest(); 8332 skip_exit_vmcall(); 8333 nop_addr = vmcs_read(GUEST_RIP); 8334 vmcs_set_bits(CPU_EXEC_CTRL0, CPU_INTR_WINDOW); 8335 8336 /* 8337 * Ask for "interrupt-window exiting" in a MOV-SS shadow with 8338 * RFLAGS.IF set, and expect a VM-exit on the next 8339 * instruction. (NOP is one byte.) 8340 */ 8341 report_prefix_push("active, blocking by MOV-SS, RFLAGS.IF=1"); 8342 vmcs_write(GUEST_INTR_STATE, GUEST_INTR_STATE_MOVSS); 8343 enter_guest(); 8344 verify_intr_window_exit(nop_addr + 1); 8345 report_prefix_pop(); 8346 8347 /* 8348 * Back up to the NOP and ask for "interrupt-window exiting" 8349 * in an STI shadow with RFLAGS.IF set, and expect a VM-exit 8350 * on the next instruction. (NOP is one byte.) 8351 */ 8352 report_prefix_push("active, blocking by STI, RFLAGS.IF=1"); 8353 vmcs_write(GUEST_RIP, nop_addr); 8354 vmcs_write(GUEST_INTR_STATE, GUEST_INTR_STATE_STI); 8355 enter_guest(); 8356 verify_intr_window_exit(nop_addr + 1); 8357 report_prefix_pop(); 8358 8359 /* 8360 * Ask for "interrupt-window exiting" with RFLAGS.IF clear, 8361 * and expect a VM-exit on the instruction following the STI 8362 * shadow. Only the first STI (which is one byte past the NOP) 8363 * should have a shadow. The second STI (which is two bytes 8364 * past the NOP) has no shadow. Therefore, the interrupt 8365 * window opens at three bytes past the NOP. 8366 */ 8367 report_prefix_push("active, RFLAGS.IF = 0"); 8368 vmcs_write(GUEST_RFLAGS, X86_EFLAGS_FIXED); 8369 enter_guest(); 8370 verify_intr_window_exit(nop_addr + 3); 8371 report_prefix_pop(); 8372 8373 if (!(rdmsr(MSR_IA32_VMX_MISC) & (1 << 6))) { 8374 report_skip("CPU does not support activity state HLT."); 8375 } else { 8376 /* 8377 * Ask for "interrupt-window exiting" when entering 8378 * activity state HLT, and expect an immediate 8379 * VM-exit. RIP is still three bytes past the nop. 8380 */ 8381 report_prefix_push("halted, no blocking"); 8382 vmcs_write(GUEST_ACTV_STATE, ACTV_HLT); 8383 enter_guest(); 8384 verify_intr_window_exit(nop_addr + 3); 8385 report_prefix_pop(); 8386 8387 /* 8388 * Ask for "interrupt-window exiting" when entering 8389 * activity state HLT (with event injection), and 8390 * expect a VM-exit after the event is injected. That 8391 * is, RIP should should be at the address specified 8392 * in the IDT entry for #DB. 8393 */ 8394 report_prefix_push("halted, no blocking, injecting #DB"); 8395 vmcs_write(GUEST_ACTV_STATE, ACTV_HLT); 8396 vmcs_write(ENT_INTR_INFO, 8397 INTR_INFO_VALID_MASK | INTR_TYPE_HARD_EXCEPTION | 8398 DB_VECTOR); 8399 enter_guest(); 8400 verify_intr_window_exit((u64)db_fault_addr); 8401 report_prefix_pop(); 8402 } 8403 8404 boot_idt[DB_VECTOR].type = orig_db_gate_type; 8405 vmcs_clear_bits(CPU_EXEC_CTRL0, CPU_INTR_WINDOW); 8406 enter_guest(); 8407 report_prefix_pop(); 8408 } 8409 8410 #define GUEST_TSC_OFFSET (1u << 30) 8411 8412 static u64 guest_tsc; 8413 8414 static void vmx_store_tsc_test_guest(void) 8415 { 8416 guest_tsc = rdtsc(); 8417 } 8418 8419 /* 8420 * This test ensures that when IA32_TSC is in the VM-exit MSR-store 8421 * list, the value saved is not subject to the TSC offset that is 8422 * applied to RDTSC/RDTSCP/RDMSR(IA32_TSC) in guest execution. 8423 */ 8424 static void vmx_store_tsc_test(void) 8425 { 8426 struct vmx_msr_entry msr_entry = { .index = MSR_IA32_TSC }; 8427 u64 low, high; 8428 8429 if (!(ctrl_cpu_rev[0].clr & CPU_USE_TSC_OFFSET)) { 8430 report_skip("'Use TSC offsetting' not supported"); 8431 return; 8432 } 8433 8434 test_set_guest(vmx_store_tsc_test_guest); 8435 8436 vmcs_set_bits(CPU_EXEC_CTRL0, CPU_USE_TSC_OFFSET); 8437 vmcs_write(EXI_MSR_ST_CNT, 1); 8438 vmcs_write(EXIT_MSR_ST_ADDR, virt_to_phys(&msr_entry)); 8439 vmcs_write(TSC_OFFSET, GUEST_TSC_OFFSET); 8440 8441 low = rdtsc(); 8442 enter_guest(); 8443 high = rdtsc(); 8444 8445 report(low + GUEST_TSC_OFFSET <= guest_tsc && 8446 guest_tsc <= high + GUEST_TSC_OFFSET, 8447 "RDTSC value in the guest (%lu) is in range [%lu, %lu]", 8448 guest_tsc, low + GUEST_TSC_OFFSET, high + GUEST_TSC_OFFSET); 8449 report(low <= msr_entry.value && msr_entry.value <= high, 8450 "IA32_TSC value saved in the VM-exit MSR-store list (%lu) is in range [%lu, %lu]", 8451 msr_entry.value, low, high); 8452 } 8453 8454 static void vmx_preemption_timer_zero_test_db_handler(struct ex_regs *regs) 8455 { 8456 } 8457 8458 static void vmx_preemption_timer_zero_test_guest(void) 8459 { 8460 while (vmx_get_test_stage() < 3) 8461 vmcall(); 8462 } 8463 8464 static void vmx_preemption_timer_zero_activate_preemption_timer(void) 8465 { 8466 vmcs_set_bits(PIN_CONTROLS, PIN_PREEMPT); 8467 vmcs_write(PREEMPT_TIMER_VALUE, 0); 8468 } 8469 8470 static void vmx_preemption_timer_zero_advance_past_vmcall(void) 8471 { 8472 vmcs_clear_bits(PIN_CONTROLS, PIN_PREEMPT); 8473 enter_guest(); 8474 skip_exit_vmcall(); 8475 } 8476 8477 static void vmx_preemption_timer_zero_inject_db(bool intercept_db) 8478 { 8479 vmx_preemption_timer_zero_activate_preemption_timer(); 8480 vmcs_write(ENT_INTR_INFO, INTR_INFO_VALID_MASK | 8481 INTR_TYPE_HARD_EXCEPTION | DB_VECTOR); 8482 vmcs_write(EXC_BITMAP, intercept_db ? 1 << DB_VECTOR : 0); 8483 enter_guest(); 8484 } 8485 8486 static void vmx_preemption_timer_zero_set_pending_dbg(u32 exception_bitmap) 8487 { 8488 vmx_preemption_timer_zero_activate_preemption_timer(); 8489 vmcs_write(GUEST_PENDING_DEBUG, BIT(12) | DR_TRAP1); 8490 vmcs_write(EXC_BITMAP, exception_bitmap); 8491 enter_guest(); 8492 } 8493 8494 static void vmx_preemption_timer_zero_expect_preempt_at_rip(u64 expected_rip) 8495 { 8496 u32 reason = (u32)vmcs_read(EXI_REASON); 8497 u64 guest_rip = vmcs_read(GUEST_RIP); 8498 8499 report(reason == VMX_PREEMPT && guest_rip == expected_rip, 8500 "Exit reason is 0x%x (expected 0x%x) and guest RIP is %lx (0x%lx expected).", 8501 reason, VMX_PREEMPT, guest_rip, expected_rip); 8502 } 8503 8504 /* 8505 * This test ensures that when the VMX preemption timer is zero at 8506 * VM-entry, a VM-exit occurs after any event injection and after any 8507 * pending debug exceptions are raised, but before execution of any 8508 * guest instructions. 8509 */ 8510 static void vmx_preemption_timer_zero_test(void) 8511 { 8512 u64 db_fault_address = (u64)get_idt_addr(&boot_idt[DB_VECTOR]); 8513 handler old_db; 8514 u32 reason; 8515 8516 if (!(ctrl_pin_rev.clr & PIN_PREEMPT)) { 8517 report_skip("'Activate VMX-preemption timer' not supported"); 8518 return; 8519 } 8520 8521 /* 8522 * Install a custom #DB handler that doesn't abort. 8523 */ 8524 old_db = handle_exception(DB_VECTOR, 8525 vmx_preemption_timer_zero_test_db_handler); 8526 8527 test_set_guest(vmx_preemption_timer_zero_test_guest); 8528 8529 /* 8530 * VMX-preemption timer should fire after event injection. 8531 */ 8532 vmx_set_test_stage(0); 8533 vmx_preemption_timer_zero_inject_db(0); 8534 vmx_preemption_timer_zero_expect_preempt_at_rip(db_fault_address); 8535 vmx_preemption_timer_zero_advance_past_vmcall(); 8536 8537 /* 8538 * VMX-preemption timer should fire after event injection. 8539 * Exception bitmap is irrelevant, since you can't intercept 8540 * an event that you injected. 8541 */ 8542 vmx_set_test_stage(1); 8543 vmx_preemption_timer_zero_inject_db(1 << DB_VECTOR); 8544 vmx_preemption_timer_zero_expect_preempt_at_rip(db_fault_address); 8545 vmx_preemption_timer_zero_advance_past_vmcall(); 8546 8547 /* 8548 * VMX-preemption timer should fire after pending debug exceptions 8549 * have delivered a #DB trap. 8550 */ 8551 vmx_set_test_stage(2); 8552 vmx_preemption_timer_zero_set_pending_dbg(0); 8553 vmx_preemption_timer_zero_expect_preempt_at_rip(db_fault_address); 8554 vmx_preemption_timer_zero_advance_past_vmcall(); 8555 8556 /* 8557 * VMX-preemption timer would fire after pending debug exceptions 8558 * have delivered a #DB trap, but in this case, the #DB trap is 8559 * intercepted. 8560 */ 8561 vmx_set_test_stage(3); 8562 vmx_preemption_timer_zero_set_pending_dbg(1 << DB_VECTOR); 8563 reason = (u32)vmcs_read(EXI_REASON); 8564 report(reason == VMX_EXC_NMI, "Exit reason is 0x%x (expected 0x%x)", 8565 reason, VMX_EXC_NMI); 8566 8567 vmcs_clear_bits(PIN_CONTROLS, PIN_PREEMPT); 8568 enter_guest(); 8569 8570 handle_exception(DB_VECTOR, old_db); 8571 } 8572 8573 static u64 vmx_preemption_timer_tf_test_prev_rip; 8574 8575 static void vmx_preemption_timer_tf_test_db_handler(struct ex_regs *regs) 8576 { 8577 extern char vmx_preemption_timer_tf_test_endloop; 8578 8579 if (vmx_get_test_stage() == 2) { 8580 /* 8581 * Stage 2 means that we're done, one way or another. 8582 * Arrange for the iret to drop us out of the wbinvd 8583 * loop and stop single-stepping. 8584 */ 8585 regs->rip = (u64)&vmx_preemption_timer_tf_test_endloop; 8586 regs->rflags &= ~X86_EFLAGS_TF; 8587 } else if (regs->rip == vmx_preemption_timer_tf_test_prev_rip) { 8588 /* 8589 * The RIP should alternate between the wbinvd and the 8590 * jmp instruction in the code below. If we ever see 8591 * the same instruction twice in a row, that means a 8592 * single-step trap has been dropped. Let the 8593 * hypervisor know about the failure by executing a 8594 * VMCALL. 8595 */ 8596 vmcall(); 8597 } 8598 vmx_preemption_timer_tf_test_prev_rip = regs->rip; 8599 } 8600 8601 static void vmx_preemption_timer_tf_test_guest(void) 8602 { 8603 /* 8604 * The hypervisor doesn't intercept WBINVD, so the loop below 8605 * shouldn't be a problem--it's just two instructions 8606 * executing in VMX non-root mode. However, when the 8607 * hypervisor is running in a virtual environment, the parent 8608 * hypervisor might intercept WBINVD and emulate it. If the 8609 * parent hypervisor is broken, the single-step trap after the 8610 * WBINVD might be lost. 8611 */ 8612 asm volatile("vmcall\n\t" 8613 "0: wbinvd\n\t" 8614 "1: jmp 0b\n\t" 8615 "vmx_preemption_timer_tf_test_endloop:"); 8616 } 8617 8618 /* 8619 * Ensure that the delivery of a "VMX-preemption timer expired" 8620 * VM-exit doesn't disrupt single-stepping in the guest. Note that 8621 * passing this test doesn't ensure correctness, because the test will 8622 * only fail if the VMX-preemtion timer fires at the right time (or 8623 * the wrong time, as it were). 8624 */ 8625 static void vmx_preemption_timer_tf_test(void) 8626 { 8627 handler old_db; 8628 u32 reason; 8629 int i; 8630 8631 if (!(ctrl_pin_rev.clr & PIN_PREEMPT)) { 8632 report_skip("'Activate VMX-preemption timer' not supported"); 8633 return; 8634 } 8635 8636 old_db = handle_exception(DB_VECTOR, 8637 vmx_preemption_timer_tf_test_db_handler); 8638 8639 test_set_guest(vmx_preemption_timer_tf_test_guest); 8640 8641 enter_guest(); 8642 skip_exit_vmcall(); 8643 8644 vmx_set_test_stage(1); 8645 vmcs_set_bits(PIN_CONTROLS, PIN_PREEMPT); 8646 vmcs_write(PREEMPT_TIMER_VALUE, 50000); 8647 vmcs_write(GUEST_RFLAGS, X86_EFLAGS_FIXED | X86_EFLAGS_TF); 8648 8649 /* 8650 * The only exit we should see is "VMX-preemption timer 8651 * expired." If we get a VMCALL exit, that means the #DB 8652 * handler has detected a missing single-step trap. It doesn't 8653 * matter where the guest RIP is when the VMX-preemption timer 8654 * expires (whether it's in the WBINVD loop or in the #DB 8655 * handler)--a single-step trap should never be discarded. 8656 */ 8657 for (i = 0; i < 10000; i++) { 8658 enter_guest(); 8659 reason = (u32)vmcs_read(EXI_REASON); 8660 if (reason == VMX_PREEMPT) 8661 continue; 8662 TEST_ASSERT(reason == VMX_VMCALL); 8663 skip_exit_insn(); 8664 break; 8665 } 8666 8667 report(reason == VMX_PREEMPT, "No single-step traps skipped"); 8668 8669 vmx_set_test_stage(2); 8670 vmcs_clear_bits(PIN_CONTROLS, PIN_PREEMPT); 8671 enter_guest(); 8672 8673 handle_exception(DB_VECTOR, old_db); 8674 } 8675 8676 #define VMX_PREEMPTION_TIMER_EXPIRY_CYCLES 1000000 8677 8678 static u64 vmx_preemption_timer_expiry_start; 8679 static u64 vmx_preemption_timer_expiry_finish; 8680 8681 static void vmx_preemption_timer_expiry_test_guest(void) 8682 { 8683 vmcall(); 8684 vmx_preemption_timer_expiry_start = fenced_rdtsc(); 8685 8686 while (vmx_get_test_stage() == 0) 8687 vmx_preemption_timer_expiry_finish = fenced_rdtsc(); 8688 } 8689 8690 /* 8691 * Test that the VMX-preemption timer is not excessively delayed. 8692 * 8693 * Per the SDM, volume 3, VM-entry starts the VMX-preemption timer 8694 * with the unsigned value in the VMX-preemption timer-value field, 8695 * and the VMX-preemption timer counts down by 1 every time bit X in 8696 * the TSC changes due to a TSC increment (where X is 8697 * IA32_VMX_MISC[4:0]). If the timer counts down to zero in any state 8698 * other than the wait-for-SIPI state, the logical processor 8699 * transitions to the C0 C-state and causes a VM-exit. 8700 * 8701 * The guest code above reads the starting TSC after VM-entry. At this 8702 * point, the VMX-preemption timer has already been activated. Next, 8703 * the guest code reads the current TSC in a loop, storing the value 8704 * read to memory. 8705 * 8706 * If the RDTSC in the loop reads a value past the VMX-preemption 8707 * timer deadline, then the VMX-preemption timer VM-exit must be 8708 * delivered before the next instruction retires. Even if a higher 8709 * priority SMI is delivered first, the VMX-preemption timer VM-exit 8710 * must be delivered before the next instruction retires. Hence, a TSC 8711 * value past the VMX-preemption timer deadline might be read, but it 8712 * cannot be stored. If a TSC value past the deadline *is* stored, 8713 * then the architectural specification has been violated. 8714 */ 8715 static void vmx_preemption_timer_expiry_test(void) 8716 { 8717 u32 preemption_timer_value; 8718 union vmx_misc misc; 8719 u64 tsc_deadline; 8720 u32 reason; 8721 8722 if (!(ctrl_pin_rev.clr & PIN_PREEMPT)) { 8723 report_skip("'Activate VMX-preemption timer' not supported"); 8724 return; 8725 } 8726 8727 test_set_guest(vmx_preemption_timer_expiry_test_guest); 8728 8729 enter_guest(); 8730 skip_exit_vmcall(); 8731 8732 misc.val = rdmsr(MSR_IA32_VMX_MISC); 8733 preemption_timer_value = 8734 VMX_PREEMPTION_TIMER_EXPIRY_CYCLES >> misc.pt_bit; 8735 8736 vmcs_set_bits(PIN_CONTROLS, PIN_PREEMPT); 8737 vmcs_write(PREEMPT_TIMER_VALUE, preemption_timer_value); 8738 vmx_set_test_stage(0); 8739 8740 enter_guest(); 8741 reason = (u32)vmcs_read(EXI_REASON); 8742 TEST_ASSERT(reason == VMX_PREEMPT); 8743 8744 vmcs_clear_bits(PIN_CONTROLS, PIN_PREEMPT); 8745 vmx_set_test_stage(1); 8746 enter_guest(); 8747 8748 tsc_deadline = ((vmx_preemption_timer_expiry_start >> misc.pt_bit) << 8749 misc.pt_bit) + (preemption_timer_value << misc.pt_bit); 8750 8751 report(vmx_preemption_timer_expiry_finish < tsc_deadline, 8752 "Last stored guest TSC (%lu) < TSC deadline (%lu)", 8753 vmx_preemption_timer_expiry_finish, tsc_deadline); 8754 } 8755 8756 static void vmx_db_test_guest(void) 8757 { 8758 /* 8759 * For a hardware generated single-step #DB. 8760 */ 8761 asm volatile("vmcall;" 8762 "nop;" 8763 ".Lpost_nop:"); 8764 /* 8765 * ...in a MOVSS shadow, with pending debug exceptions. 8766 */ 8767 asm volatile("vmcall;" 8768 "nop;" 8769 ".Lpost_movss_nop:"); 8770 /* 8771 * For an L0 synthesized single-step #DB. (L0 intercepts WBINVD and 8772 * emulates it in software.) 8773 */ 8774 asm volatile("vmcall;" 8775 "wbinvd;" 8776 ".Lpost_wbinvd:"); 8777 /* 8778 * ...in a MOVSS shadow, with pending debug exceptions. 8779 */ 8780 asm volatile("vmcall;" 8781 "wbinvd;" 8782 ".Lpost_movss_wbinvd:"); 8783 /* 8784 * For a hardware generated single-step #DB in a transactional region. 8785 */ 8786 asm volatile("vmcall;" 8787 ".Lxbegin: xbegin .Lskip_rtm;" 8788 "xend;" 8789 ".Lskip_rtm:"); 8790 } 8791 8792 /* 8793 * Clear the pending debug exceptions and RFLAGS.TF and re-enter 8794 * L2. No #DB is delivered and L2 continues to the next point of 8795 * interest. 8796 */ 8797 static void dismiss_db(void) 8798 { 8799 vmcs_write(GUEST_PENDING_DEBUG, 0); 8800 vmcs_write(GUEST_RFLAGS, X86_EFLAGS_FIXED); 8801 enter_guest(); 8802 } 8803 8804 /* 8805 * Check a variety of VMCS fields relevant to an intercepted #DB exception. 8806 * Then throw away the #DB exception and resume L2. 8807 */ 8808 static void check_db_exit(bool xfail_qual, bool xfail_dr6, bool xfail_pdbg, 8809 void *expected_rip, u64 expected_exit_qual, 8810 u64 expected_dr6) 8811 { 8812 u32 reason = vmcs_read(EXI_REASON); 8813 u32 intr_info = vmcs_read(EXI_INTR_INFO); 8814 u64 exit_qual = vmcs_read(EXI_QUALIFICATION); 8815 u64 guest_rip = vmcs_read(GUEST_RIP); 8816 u64 guest_pending_dbg = vmcs_read(GUEST_PENDING_DEBUG); 8817 u64 dr6 = read_dr6(); 8818 const u32 expected_intr_info = INTR_INFO_VALID_MASK | 8819 INTR_TYPE_HARD_EXCEPTION | DB_VECTOR; 8820 8821 report(reason == VMX_EXC_NMI && intr_info == expected_intr_info, 8822 "Expected #DB VM-exit"); 8823 report((u64)expected_rip == guest_rip, "Expected RIP %p (actual %lx)", 8824 expected_rip, guest_rip); 8825 report_xfail(xfail_pdbg, 0 == guest_pending_dbg, 8826 "Expected pending debug exceptions 0 (actual %lx)", 8827 guest_pending_dbg); 8828 report_xfail(xfail_qual, expected_exit_qual == exit_qual, 8829 "Expected exit qualification %lx (actual %lx)", 8830 expected_exit_qual, exit_qual); 8831 report_xfail(xfail_dr6, expected_dr6 == dr6, 8832 "Expected DR6 %lx (actual %lx)", expected_dr6, dr6); 8833 dismiss_db(); 8834 } 8835 8836 /* 8837 * Assuming the guest has just exited on a VMCALL instruction, skip 8838 * over the vmcall, and set the guest's RFLAGS.TF in the VMCS. If 8839 * pending debug exceptions are non-zero, set the VMCS up as if the 8840 * previous instruction was a MOVSS that generated the indicated 8841 * pending debug exceptions. Then enter L2. 8842 */ 8843 static void single_step_guest(const char *test_name, u64 starting_dr6, 8844 u64 pending_debug_exceptions) 8845 { 8846 printf("\n%s\n", test_name); 8847 skip_exit_vmcall(); 8848 write_dr6(starting_dr6); 8849 vmcs_write(GUEST_RFLAGS, X86_EFLAGS_FIXED | X86_EFLAGS_TF); 8850 if (pending_debug_exceptions) { 8851 vmcs_write(GUEST_PENDING_DEBUG, pending_debug_exceptions); 8852 vmcs_write(GUEST_INTR_STATE, GUEST_INTR_STATE_MOVSS); 8853 } 8854 enter_guest(); 8855 } 8856 8857 /* 8858 * When L1 intercepts #DB, verify that a single-step trap clears 8859 * pending debug exceptions, populates the exit qualification field 8860 * properly, and that DR6 is not prematurely clobbered. In a 8861 * (simulated) MOVSS shadow, make sure that the pending debug 8862 * exception bits are properly accumulated into the exit qualification 8863 * field. 8864 */ 8865 static void vmx_db_test(void) 8866 { 8867 /* 8868 * We are going to set a few arbitrary bits in DR6 to verify that 8869 * (a) DR6 is not modified by an intercepted #DB, and 8870 * (b) stale bits in DR6 (DR6.BD, in particular) don't leak into 8871 * the exit qualification field for a subsequent #DB exception. 8872 */ 8873 const u64 starting_dr6 = DR6_RESERVED | BIT(13) | DR_TRAP3 | DR_TRAP1; 8874 extern char post_nop asm(".Lpost_nop"); 8875 extern char post_movss_nop asm(".Lpost_movss_nop"); 8876 extern char post_wbinvd asm(".Lpost_wbinvd"); 8877 extern char post_movss_wbinvd asm(".Lpost_movss_wbinvd"); 8878 extern char xbegin asm(".Lxbegin"); 8879 extern char skip_rtm asm(".Lskip_rtm"); 8880 8881 /* 8882 * L1 wants to intercept #DB exceptions encountered in L2. 8883 */ 8884 vmcs_write(EXC_BITMAP, BIT(DB_VECTOR)); 8885 8886 /* 8887 * Start L2 and run it up to the first point of interest. 8888 */ 8889 test_set_guest(vmx_db_test_guest); 8890 enter_guest(); 8891 8892 /* 8893 * Hardware-delivered #DB trap for single-step sets the 8894 * standard that L0 has to follow for emulated instructions. 8895 */ 8896 single_step_guest("Hardware delivered single-step", starting_dr6, 0); 8897 check_db_exit(false, false, false, &post_nop, DR_STEP, starting_dr6); 8898 8899 /* 8900 * Hardware-delivered #DB trap for single-step in MOVSS shadow 8901 * also sets the standard that L0 has to follow for emulated 8902 * instructions. Here, we establish the VMCS pending debug 8903 * exceptions to indicate that the simulated MOVSS triggered a 8904 * data breakpoint as well as the single-step trap. 8905 */ 8906 single_step_guest("Hardware delivered single-step in MOVSS shadow", 8907 starting_dr6, BIT(12) | DR_STEP | DR_TRAP0 ); 8908 check_db_exit(false, false, false, &post_movss_nop, DR_STEP | DR_TRAP0, 8909 starting_dr6); 8910 8911 /* 8912 * L0 synthesized #DB trap for single-step is buggy, because 8913 * kvm (a) clobbers DR6 too early, and (b) tries its best to 8914 * reconstitute the exit qualification from the prematurely 8915 * modified DR6, but fails miserably. 8916 */ 8917 single_step_guest("Software synthesized single-step", starting_dr6, 0); 8918 check_db_exit(false, false, false, &post_wbinvd, DR_STEP, starting_dr6); 8919 8920 /* 8921 * L0 synthesized #DB trap for single-step in MOVSS shadow is 8922 * even worse, because L0 also leaves the pending debug 8923 * exceptions in the VMCS instead of accumulating them into 8924 * the exit qualification field for the #DB exception. 8925 */ 8926 single_step_guest("Software synthesized single-step in MOVSS shadow", 8927 starting_dr6, BIT(12) | DR_STEP | DR_TRAP0); 8928 check_db_exit(true, false, true, &post_movss_wbinvd, DR_STEP | DR_TRAP0, 8929 starting_dr6); 8930 8931 /* 8932 * Optional RTM test for hardware that supports RTM, to 8933 * demonstrate that the current volume 3 of the SDM 8934 * (325384-067US), table 27-1 is incorrect. Bit 16 of the exit 8935 * qualification for debug exceptions is not reserved. It is 8936 * set to 1 if a debug exception (#DB) or a breakpoint 8937 * exception (#BP) occurs inside an RTM region while advanced 8938 * debugging of RTM transactional regions is enabled. 8939 */ 8940 if (this_cpu_has(X86_FEATURE_RTM)) { 8941 vmcs_write(ENT_CONTROLS, 8942 vmcs_read(ENT_CONTROLS) | ENT_LOAD_DBGCTLS); 8943 /* 8944 * Set DR7.RTM[bit 11] and IA32_DEBUGCTL.RTM[bit 15] 8945 * in the guest to enable advanced debugging of RTM 8946 * transactional regions. 8947 */ 8948 vmcs_write(GUEST_DR7, BIT(11)); 8949 vmcs_write(GUEST_DEBUGCTL, BIT(15)); 8950 single_step_guest("Hardware delivered single-step in " 8951 "transactional region", starting_dr6, 0); 8952 check_db_exit(false, false, false, &xbegin, BIT(16), 8953 starting_dr6); 8954 } else { 8955 vmcs_write(GUEST_RIP, (u64)&skip_rtm); 8956 enter_guest(); 8957 } 8958 } 8959 8960 static void enable_vid(void) 8961 { 8962 void *virtual_apic_page; 8963 8964 assert(cpu_has_apicv()); 8965 8966 disable_intercept_for_x2apic_msrs(); 8967 8968 virtual_apic_page = alloc_page(); 8969 vmcs_write(APIC_VIRT_ADDR, (u64)virtual_apic_page); 8970 8971 vmcs_set_bits(PIN_CONTROLS, PIN_EXTINT); 8972 8973 vmcs_write(EOI_EXIT_BITMAP0, 0x0); 8974 vmcs_write(EOI_EXIT_BITMAP1, 0x0); 8975 vmcs_write(EOI_EXIT_BITMAP2, 0x0); 8976 vmcs_write(EOI_EXIT_BITMAP3, 0x0); 8977 8978 vmcs_set_bits(CPU_EXEC_CTRL0, CPU_SECONDARY | CPU_TPR_SHADOW); 8979 vmcs_set_bits(CPU_EXEC_CTRL1, CPU_VINTD | CPU_VIRT_X2APIC); 8980 } 8981 8982 static void trigger_ioapic_scan_thread(void *data) 8983 { 8984 /* Wait until other CPU entered L2 */ 8985 while (vmx_get_test_stage() != 1) 8986 ; 8987 8988 /* Trigger ioapic scan */ 8989 ioapic_set_redir(0xf, 0x79, TRIGGER_LEVEL); 8990 vmx_set_test_stage(2); 8991 } 8992 8993 static void irq_79_handler_guest(isr_regs_t *regs) 8994 { 8995 eoi(); 8996 8997 /* L1 expects vmexit on VMX_VMCALL and not VMX_EOI_INDUCED */ 8998 vmcall(); 8999 } 9000 9001 /* 9002 * Constant for num of busy-loop iterations after which 9003 * a timer interrupt should have happened in host 9004 */ 9005 #define TIMER_INTERRUPT_DELAY 100000000 9006 9007 static void vmx_eoi_bitmap_ioapic_scan_test_guest(void) 9008 { 9009 handle_irq(0x79, irq_79_handler_guest); 9010 irq_enable(); 9011 9012 /* Signal to L1 CPU to trigger ioapic scan */ 9013 vmx_set_test_stage(1); 9014 /* Wait until L1 CPU to trigger ioapic scan */ 9015 while (vmx_get_test_stage() != 2) 9016 ; 9017 9018 /* 9019 * Wait for L0 timer interrupt to be raised while we run in L2 9020 * such that L0 will process the IOAPIC scan request before 9021 * resuming L2 9022 */ 9023 delay(TIMER_INTERRUPT_DELAY); 9024 9025 asm volatile ("int $0x79"); 9026 } 9027 9028 static void vmx_eoi_bitmap_ioapic_scan_test(void) 9029 { 9030 if (!cpu_has_apicv() || (cpu_count() < 2)) { 9031 report_skip(__func__); 9032 return; 9033 } 9034 9035 enable_vid(); 9036 9037 on_cpu_async(1, trigger_ioapic_scan_thread, NULL); 9038 test_set_guest(vmx_eoi_bitmap_ioapic_scan_test_guest); 9039 9040 /* 9041 * Launch L2. 9042 * We expect the exit reason to be VMX_VMCALL (and not EOI INDUCED). 9043 * In case the reason isn't VMX_VMCALL, the asserion inside 9044 * skip_exit_vmcall() will fail. 9045 */ 9046 enter_guest(); 9047 skip_exit_vmcall(); 9048 9049 /* Let L2 finish */ 9050 enter_guest(); 9051 report(1, __func__); 9052 } 9053 9054 #define HLT_WITH_RVI_VECTOR (0xf1) 9055 9056 bool vmx_hlt_with_rvi_guest_isr_fired; 9057 static void vmx_hlt_with_rvi_guest_isr(isr_regs_t *regs) 9058 { 9059 vmx_hlt_with_rvi_guest_isr_fired = true; 9060 eoi(); 9061 } 9062 9063 static void vmx_hlt_with_rvi_guest(void) 9064 { 9065 handle_irq(HLT_WITH_RVI_VECTOR, vmx_hlt_with_rvi_guest_isr); 9066 9067 irq_enable(); 9068 asm volatile ("nop"); 9069 9070 vmcall(); 9071 } 9072 9073 static void vmx_hlt_with_rvi_test(void) 9074 { 9075 if (!cpu_has_apicv()) { 9076 report_skip(__func__); 9077 return; 9078 } 9079 9080 enable_vid(); 9081 9082 vmx_hlt_with_rvi_guest_isr_fired = false; 9083 test_set_guest(vmx_hlt_with_rvi_guest); 9084 9085 enter_guest(); 9086 skip_exit_vmcall(); 9087 9088 vmcs_write(GUEST_ACTV_STATE, ACTV_HLT); 9089 vmcs_write(GUEST_INT_STATUS, HLT_WITH_RVI_VECTOR); 9090 enter_guest(); 9091 9092 report(vmx_hlt_with_rvi_guest_isr_fired, "Interrupt raised in guest"); 9093 } 9094 9095 static void set_irq_line_thread(void *data) 9096 { 9097 /* Wait until other CPU entered L2 */ 9098 while (vmx_get_test_stage() != 1) 9099 ; 9100 9101 /* Set irq-line 0xf to raise vector 0x78 for vCPU 0 */ 9102 ioapic_set_redir(0xf, 0x78, TRIGGER_LEVEL); 9103 vmx_set_test_stage(2); 9104 } 9105 9106 static bool irq_78_handler_vmcall_before_eoi; 9107 static void irq_78_handler_guest(isr_regs_t *regs) 9108 { 9109 set_irq_line(0xf, 0); 9110 if (irq_78_handler_vmcall_before_eoi) 9111 vmcall(); 9112 eoi(); 9113 vmcall(); 9114 } 9115 9116 static void vmx_apic_passthrough_guest(void) 9117 { 9118 handle_irq(0x78, irq_78_handler_guest); 9119 irq_enable(); 9120 9121 /* If requested, wait for other CPU to trigger ioapic scan */ 9122 if (vmx_get_test_stage() < 1) { 9123 vmx_set_test_stage(1); 9124 while (vmx_get_test_stage() != 2) 9125 ; 9126 } 9127 9128 set_irq_line(0xf, 1); 9129 } 9130 9131 static void vmx_apic_passthrough(bool set_irq_line_from_thread) 9132 { 9133 if (set_irq_line_from_thread && (cpu_count() < 2)) { 9134 report_skip(__func__); 9135 return; 9136 } 9137 9138 /* Test device is required for generating IRQs */ 9139 if (!test_device_enabled()) { 9140 report_skip(__func__); 9141 return; 9142 } 9143 u64 cpu_ctrl_0 = CPU_SECONDARY; 9144 u64 cpu_ctrl_1 = 0; 9145 9146 disable_intercept_for_x2apic_msrs(); 9147 9148 vmcs_write(PIN_CONTROLS, vmcs_read(PIN_CONTROLS) & ~PIN_EXTINT); 9149 9150 vmcs_write(CPU_EXEC_CTRL0, vmcs_read(CPU_EXEC_CTRL0) | cpu_ctrl_0); 9151 vmcs_write(CPU_EXEC_CTRL1, vmcs_read(CPU_EXEC_CTRL1) | cpu_ctrl_1); 9152 9153 if (set_irq_line_from_thread) { 9154 irq_78_handler_vmcall_before_eoi = false; 9155 on_cpu_async(1, set_irq_line_thread, NULL); 9156 } else { 9157 irq_78_handler_vmcall_before_eoi = true; 9158 ioapic_set_redir(0xf, 0x78, TRIGGER_LEVEL); 9159 vmx_set_test_stage(2); 9160 } 9161 test_set_guest(vmx_apic_passthrough_guest); 9162 9163 if (irq_78_handler_vmcall_before_eoi) { 9164 /* Before EOI remote_irr should still be set */ 9165 enter_guest(); 9166 skip_exit_vmcall(); 9167 TEST_ASSERT_EQ_MSG(1, (int)ioapic_read_redir(0xf).remote_irr, 9168 "IOAPIC pass-through: remote_irr=1 before EOI"); 9169 } 9170 9171 /* After EOI remote_irr should be cleared */ 9172 enter_guest(); 9173 skip_exit_vmcall(); 9174 TEST_ASSERT_EQ_MSG(0, (int)ioapic_read_redir(0xf).remote_irr, 9175 "IOAPIC pass-through: remote_irr=0 after EOI"); 9176 9177 /* Let L2 finish */ 9178 enter_guest(); 9179 report(1, __func__); 9180 } 9181 9182 static void vmx_apic_passthrough_test(void) 9183 { 9184 vmx_apic_passthrough(false); 9185 } 9186 9187 static void vmx_apic_passthrough_thread_test(void) 9188 { 9189 vmx_apic_passthrough(true); 9190 } 9191 9192 static void vmx_apic_passthrough_tpr_threshold_guest(void) 9193 { 9194 cli(); 9195 apic_set_tpr(0); 9196 } 9197 9198 static bool vmx_apic_passthrough_tpr_threshold_ipi_isr_fired; 9199 static void vmx_apic_passthrough_tpr_threshold_ipi_isr(isr_regs_t *regs) 9200 { 9201 vmx_apic_passthrough_tpr_threshold_ipi_isr_fired = true; 9202 eoi(); 9203 } 9204 9205 static void vmx_apic_passthrough_tpr_threshold_test(void) 9206 { 9207 int ipi_vector = 0xe1; 9208 9209 disable_intercept_for_x2apic_msrs(); 9210 vmcs_clear_bits(PIN_CONTROLS, PIN_EXTINT); 9211 9212 /* Raise L0 TPR-threshold by queueing vector in LAPIC IRR */ 9213 cli(); 9214 apic_set_tpr((ipi_vector >> 4) + 1); 9215 apic_icr_write(APIC_DEST_SELF | APIC_DEST_PHYSICAL | 9216 APIC_DM_FIXED | ipi_vector, 9217 0); 9218 9219 test_set_guest(vmx_apic_passthrough_tpr_threshold_guest); 9220 enter_guest(); 9221 9222 report(apic_get_tpr() == 0, "TPR was zero by guest"); 9223 9224 /* Clean pending self-IPI */ 9225 vmx_apic_passthrough_tpr_threshold_ipi_isr_fired = false; 9226 handle_irq(ipi_vector, vmx_apic_passthrough_tpr_threshold_ipi_isr); 9227 sti(); 9228 asm volatile ("nop"); 9229 report(vmx_apic_passthrough_tpr_threshold_ipi_isr_fired, "self-IPI fired"); 9230 9231 report(1, __func__); 9232 } 9233 9234 static u64 init_signal_test_exit_reason; 9235 static bool init_signal_test_thread_continued; 9236 9237 static void init_signal_test_thread(void *data) 9238 { 9239 struct vmcs *test_vmcs = data; 9240 9241 /* Enter VMX operation (i.e. exec VMXON) */ 9242 u64 *ap_vmxon_region = alloc_page(); 9243 enable_vmx(); 9244 init_vmx(ap_vmxon_region); 9245 _vmx_on(ap_vmxon_region); 9246 9247 /* Signal CPU have entered VMX operation */ 9248 vmx_set_test_stage(1); 9249 9250 /* Wait for BSP CPU to send INIT signal */ 9251 while (vmx_get_test_stage() != 2) 9252 ; 9253 9254 /* 9255 * Signal that we continue as usual as INIT signal 9256 * should be blocked while CPU is in VMX operation 9257 */ 9258 vmx_set_test_stage(3); 9259 9260 /* Wait for signal to enter VMX non-root mode */ 9261 while (vmx_get_test_stage() != 4) 9262 ; 9263 9264 /* Enter VMX non-root mode */ 9265 test_set_guest(v2_null_test_guest); 9266 make_vmcs_current(test_vmcs); 9267 enter_guest(); 9268 /* Save exit reason for BSP CPU to compare to expected result */ 9269 init_signal_test_exit_reason = vmcs_read(EXI_REASON); 9270 /* VMCLEAR test-vmcs so it could be loaded by BSP CPU */ 9271 vmcs_clear(test_vmcs); 9272 launched = false; 9273 /* Signal that CPU exited to VMX root mode */ 9274 vmx_set_test_stage(5); 9275 9276 /* Wait for BSP CPU to signal to exit VMX operation */ 9277 while (vmx_get_test_stage() != 6) 9278 ; 9279 9280 /* Exit VMX operation (i.e. exec VMXOFF) */ 9281 vmx_off(); 9282 9283 /* 9284 * Signal to BSP CPU that we continue as usual as INIT signal 9285 * should have been consumed by VMX_INIT exit from guest 9286 */ 9287 vmx_set_test_stage(7); 9288 9289 /* Wait for BSP CPU to signal to enter VMX operation */ 9290 while (vmx_get_test_stage() != 8) 9291 ; 9292 /* Enter VMX operation (i.e. exec VMXON) */ 9293 _vmx_on(ap_vmxon_region); 9294 /* Signal to BSP we are in VMX operation */ 9295 vmx_set_test_stage(9); 9296 9297 /* Wait for BSP CPU to send INIT signal */ 9298 while (vmx_get_test_stage() != 10) 9299 ; 9300 9301 /* Exit VMX operation (i.e. exec VMXOFF) */ 9302 vmx_off(); 9303 9304 /* 9305 * Exiting VMX operation should result in latched 9306 * INIT signal being processed. Therefore, we should 9307 * never reach the below code. Thus, signal to BSP 9308 * CPU if we have reached here so it is able to 9309 * report an issue if it happens. 9310 */ 9311 init_signal_test_thread_continued = true; 9312 } 9313 9314 #define INIT_SIGNAL_TEST_DELAY 100000000ULL 9315 9316 static void vmx_init_signal_test(void) 9317 { 9318 struct vmcs *test_vmcs; 9319 9320 if (cpu_count() < 2) { 9321 report_skip(__func__); 9322 return; 9323 } 9324 9325 /* VMCLEAR test-vmcs so it could be loaded by other CPU */ 9326 vmcs_save(&test_vmcs); 9327 vmcs_clear(test_vmcs); 9328 9329 vmx_set_test_stage(0); 9330 on_cpu_async(1, init_signal_test_thread, test_vmcs); 9331 9332 /* Wait for other CPU to enter VMX operation */ 9333 while (vmx_get_test_stage() != 1) 9334 ; 9335 9336 /* Send INIT signal to other CPU */ 9337 apic_icr_write(APIC_DEST_PHYSICAL | APIC_DM_INIT | APIC_INT_ASSERT, 9338 id_map[1]); 9339 /* Signal other CPU we have sent INIT signal */ 9340 vmx_set_test_stage(2); 9341 9342 /* 9343 * Wait reasonable amount of time for INIT signal to 9344 * be received on other CPU and verify that other CPU 9345 * have proceed as usual to next test stage as INIT 9346 * signal should be blocked while other CPU in 9347 * VMX operation 9348 */ 9349 delay(INIT_SIGNAL_TEST_DELAY); 9350 report(vmx_get_test_stage() == 3, 9351 "INIT signal blocked when CPU in VMX operation"); 9352 /* No point to continue if we failed at this point */ 9353 if (vmx_get_test_stage() != 3) 9354 return; 9355 9356 /* Signal other CPU to enter VMX non-root mode */ 9357 init_signal_test_exit_reason = -1ull; 9358 vmx_set_test_stage(4); 9359 /* 9360 * Wait reasonable amont of time for other CPU 9361 * to exit to VMX root mode 9362 */ 9363 delay(INIT_SIGNAL_TEST_DELAY); 9364 if (vmx_get_test_stage() != 5) { 9365 report(false, "Pending INIT signal didn't result in VMX exit"); 9366 return; 9367 } 9368 report(init_signal_test_exit_reason == VMX_INIT, 9369 "INIT signal during VMX non-root mode result in exit-reason %s (%lu)", 9370 exit_reason_description(init_signal_test_exit_reason), 9371 init_signal_test_exit_reason); 9372 9373 /* Run guest to completion */ 9374 make_vmcs_current(test_vmcs); 9375 enter_guest(); 9376 9377 /* Signal other CPU to exit VMX operation */ 9378 init_signal_test_thread_continued = false; 9379 vmx_set_test_stage(6); 9380 9381 /* Wait reasonable amount of time for other CPU to exit VMX operation */ 9382 delay(INIT_SIGNAL_TEST_DELAY); 9383 report(vmx_get_test_stage() == 7, 9384 "INIT signal consumed on VMX_INIT exit"); 9385 /* No point to continue if we failed at this point */ 9386 if (vmx_get_test_stage() != 7) 9387 return; 9388 9389 /* Signal other CPU to enter VMX operation */ 9390 vmx_set_test_stage(8); 9391 /* Wait for other CPU to enter VMX operation */ 9392 while (vmx_get_test_stage() != 9) 9393 ; 9394 9395 /* Send INIT signal to other CPU */ 9396 apic_icr_write(APIC_DEST_PHYSICAL | APIC_DM_INIT | APIC_INT_ASSERT, 9397 id_map[1]); 9398 /* Signal other CPU we have sent INIT signal */ 9399 vmx_set_test_stage(10); 9400 9401 /* 9402 * Wait reasonable amount of time for other CPU 9403 * to exit VMX operation and process INIT signal 9404 */ 9405 delay(INIT_SIGNAL_TEST_DELAY); 9406 report(!init_signal_test_thread_continued, 9407 "INIT signal processed after exit VMX operation"); 9408 9409 /* 9410 * TODO: Send SIPI to other CPU to sipi_entry (See x86/cstart64.S) 9411 * to re-init it to kvm-unit-tests standard environment. 9412 * Somehow (?) verify that SIPI was indeed received. 9413 */ 9414 } 9415 9416 enum vmcs_access { 9417 ACCESS_VMREAD, 9418 ACCESS_VMWRITE, 9419 ACCESS_NONE, 9420 }; 9421 9422 struct vmcs_shadow_test_common { 9423 enum vmcs_access op; 9424 enum Reason reason; 9425 u64 field; 9426 u64 value; 9427 u64 flags; 9428 u64 time; 9429 } l1_l2_common; 9430 9431 static inline u64 vmread_flags(u64 field, u64 *val) 9432 { 9433 u64 flags; 9434 9435 asm volatile ("vmread %2, %1; pushf; pop %0" 9436 : "=r" (flags), "=rm" (*val) : "r" (field) : "cc"); 9437 return flags & X86_EFLAGS_ALU; 9438 } 9439 9440 static inline u64 vmwrite_flags(u64 field, u64 val) 9441 { 9442 u64 flags; 9443 9444 asm volatile ("vmwrite %1, %2; pushf; pop %0" 9445 : "=r"(flags) : "rm" (val), "r" (field) : "cc"); 9446 return flags & X86_EFLAGS_ALU; 9447 } 9448 9449 static void vmx_vmcs_shadow_test_guest(void) 9450 { 9451 struct vmcs_shadow_test_common *c = &l1_l2_common; 9452 u64 start; 9453 9454 while (c->op != ACCESS_NONE) { 9455 start = rdtsc(); 9456 switch (c->op) { 9457 default: 9458 c->flags = -1ull; 9459 break; 9460 case ACCESS_VMREAD: 9461 c->flags = vmread_flags(c->field, &c->value); 9462 break; 9463 case ACCESS_VMWRITE: 9464 c->flags = vmwrite_flags(c->field, 0); 9465 break; 9466 } 9467 c->time = rdtsc() - start; 9468 vmcall(); 9469 } 9470 } 9471 9472 static u64 vmread_from_shadow(u64 field) 9473 { 9474 struct vmcs *primary; 9475 struct vmcs *shadow; 9476 u64 value; 9477 9478 TEST_ASSERT(!vmcs_save(&primary)); 9479 shadow = (struct vmcs *)vmcs_read(VMCS_LINK_PTR); 9480 TEST_ASSERT(!make_vmcs_current(shadow)); 9481 value = vmcs_read(field); 9482 TEST_ASSERT(!make_vmcs_current(primary)); 9483 return value; 9484 } 9485 9486 static u64 vmwrite_to_shadow(u64 field, u64 value) 9487 { 9488 struct vmcs *primary; 9489 struct vmcs *shadow; 9490 9491 TEST_ASSERT(!vmcs_save(&primary)); 9492 shadow = (struct vmcs *)vmcs_read(VMCS_LINK_PTR); 9493 TEST_ASSERT(!make_vmcs_current(shadow)); 9494 vmcs_write(field, value); 9495 value = vmcs_read(field); 9496 TEST_ASSERT(!make_vmcs_current(primary)); 9497 return value; 9498 } 9499 9500 static void vmcs_shadow_test_access(u8 *bitmap[2], enum vmcs_access access) 9501 { 9502 struct vmcs_shadow_test_common *c = &l1_l2_common; 9503 9504 c->op = access; 9505 vmcs_write(VMX_INST_ERROR, 0); 9506 enter_guest(); 9507 c->reason = vmcs_read(EXI_REASON) & 0xffff; 9508 if (c->reason != VMX_VMCALL) { 9509 skip_exit_insn(); 9510 enter_guest(); 9511 } 9512 skip_exit_vmcall(); 9513 } 9514 9515 static void vmcs_shadow_test_field(u8 *bitmap[2], u64 field) 9516 { 9517 struct vmcs_shadow_test_common *c = &l1_l2_common; 9518 struct vmcs *shadow; 9519 u64 value; 9520 uintptr_t flags[2]; 9521 bool good_shadow; 9522 u32 vmx_inst_error; 9523 9524 report_prefix_pushf("field %lx", field); 9525 c->field = field; 9526 9527 shadow = (struct vmcs *)vmcs_read(VMCS_LINK_PTR); 9528 if (shadow != (struct vmcs *)-1ull) { 9529 flags[ACCESS_VMREAD] = vmread_flags(field, &value); 9530 flags[ACCESS_VMWRITE] = vmwrite_flags(field, value); 9531 good_shadow = !flags[ACCESS_VMREAD] && !flags[ACCESS_VMWRITE]; 9532 } else { 9533 /* 9534 * When VMCS link pointer is -1ull, VMWRITE/VMREAD on 9535 * shadowed-fields should fail with setting RFLAGS.CF. 9536 */ 9537 flags[ACCESS_VMREAD] = X86_EFLAGS_CF; 9538 flags[ACCESS_VMWRITE] = X86_EFLAGS_CF; 9539 good_shadow = false; 9540 } 9541 9542 /* Intercept both VMREAD and VMWRITE. */ 9543 report_prefix_push("no VMREAD/VMWRITE permission"); 9544 /* VMWRITE/VMREAD done on reserved-bit should always intercept */ 9545 if (!(field >> VMCS_FIELD_RESERVED_SHIFT)) { 9546 set_bit(field, bitmap[ACCESS_VMREAD]); 9547 set_bit(field, bitmap[ACCESS_VMWRITE]); 9548 } 9549 vmcs_shadow_test_access(bitmap, ACCESS_VMWRITE); 9550 report(c->reason == VMX_VMWRITE, "not shadowed for VMWRITE"); 9551 vmcs_shadow_test_access(bitmap, ACCESS_VMREAD); 9552 report(c->reason == VMX_VMREAD, "not shadowed for VMREAD"); 9553 report_prefix_pop(); 9554 9555 if (field >> VMCS_FIELD_RESERVED_SHIFT) 9556 goto out; 9557 9558 /* Permit shadowed VMREAD. */ 9559 report_prefix_push("VMREAD permission only"); 9560 clear_bit(field, bitmap[ACCESS_VMREAD]); 9561 set_bit(field, bitmap[ACCESS_VMWRITE]); 9562 if (good_shadow) 9563 value = vmwrite_to_shadow(field, MAGIC_VAL_1 + field); 9564 vmcs_shadow_test_access(bitmap, ACCESS_VMWRITE); 9565 report(c->reason == VMX_VMWRITE, "not shadowed for VMWRITE"); 9566 vmcs_shadow_test_access(bitmap, ACCESS_VMREAD); 9567 vmx_inst_error = vmcs_read(VMX_INST_ERROR); 9568 report(c->reason == VMX_VMCALL, "shadowed for VMREAD (in %ld cycles)", 9569 c->time); 9570 report(c->flags == flags[ACCESS_VMREAD], 9571 "ALU flags after VMREAD (%lx) are as expected (%lx)", 9572 c->flags, flags[ACCESS_VMREAD]); 9573 if (good_shadow) 9574 report(c->value == value, 9575 "value read from shadow (%lx) is as expected (%lx)", 9576 c->value, value); 9577 else if (shadow != (struct vmcs *)-1ull && flags[ACCESS_VMREAD]) 9578 report(vmx_inst_error == VMXERR_UNSUPPORTED_VMCS_COMPONENT, 9579 "VMX_INST_ERROR (%d) is as expected (%d)", 9580 vmx_inst_error, VMXERR_UNSUPPORTED_VMCS_COMPONENT); 9581 report_prefix_pop(); 9582 9583 /* Permit shadowed VMWRITE. */ 9584 report_prefix_push("VMWRITE permission only"); 9585 set_bit(field, bitmap[ACCESS_VMREAD]); 9586 clear_bit(field, bitmap[ACCESS_VMWRITE]); 9587 if (good_shadow) 9588 vmwrite_to_shadow(field, MAGIC_VAL_1 + field); 9589 vmcs_shadow_test_access(bitmap, ACCESS_VMWRITE); 9590 vmx_inst_error = vmcs_read(VMX_INST_ERROR); 9591 report(c->reason == VMX_VMCALL, 9592 "shadowed for VMWRITE (in %ld cycles)", 9593 c->time); 9594 report(c->flags == flags[ACCESS_VMREAD], 9595 "ALU flags after VMWRITE (%lx) are as expected (%lx)", 9596 c->flags, flags[ACCESS_VMREAD]); 9597 if (good_shadow) { 9598 value = vmread_from_shadow(field); 9599 report(value == 0, 9600 "shadow VMCS value (%lx) is as expected (%lx)", value, 9601 0ul); 9602 } else if (shadow != (struct vmcs *)-1ull && flags[ACCESS_VMWRITE]) { 9603 report(vmx_inst_error == VMXERR_UNSUPPORTED_VMCS_COMPONENT, 9604 "VMX_INST_ERROR (%d) is as expected (%d)", 9605 vmx_inst_error, VMXERR_UNSUPPORTED_VMCS_COMPONENT); 9606 } 9607 vmcs_shadow_test_access(bitmap, ACCESS_VMREAD); 9608 report(c->reason == VMX_VMREAD, "not shadowed for VMREAD"); 9609 report_prefix_pop(); 9610 9611 /* Permit shadowed VMREAD and VMWRITE. */ 9612 report_prefix_push("VMREAD and VMWRITE permission"); 9613 clear_bit(field, bitmap[ACCESS_VMREAD]); 9614 clear_bit(field, bitmap[ACCESS_VMWRITE]); 9615 if (good_shadow) 9616 vmwrite_to_shadow(field, MAGIC_VAL_1 + field); 9617 vmcs_shadow_test_access(bitmap, ACCESS_VMWRITE); 9618 vmx_inst_error = vmcs_read(VMX_INST_ERROR); 9619 report(c->reason == VMX_VMCALL, 9620 "shadowed for VMWRITE (in %ld cycles)", 9621 c->time); 9622 report(c->flags == flags[ACCESS_VMREAD], 9623 "ALU flags after VMWRITE (%lx) are as expected (%lx)", 9624 c->flags, flags[ACCESS_VMREAD]); 9625 if (good_shadow) { 9626 value = vmread_from_shadow(field); 9627 report(value == 0, 9628 "shadow VMCS value (%lx) is as expected (%lx)", value, 9629 0ul); 9630 } else if (shadow != (struct vmcs *)-1ull && flags[ACCESS_VMWRITE]) { 9631 report(vmx_inst_error == VMXERR_UNSUPPORTED_VMCS_COMPONENT, 9632 "VMX_INST_ERROR (%d) is as expected (%d)", 9633 vmx_inst_error, VMXERR_UNSUPPORTED_VMCS_COMPONENT); 9634 } 9635 vmcs_shadow_test_access(bitmap, ACCESS_VMREAD); 9636 vmx_inst_error = vmcs_read(VMX_INST_ERROR); 9637 report(c->reason == VMX_VMCALL, "shadowed for VMREAD (in %ld cycles)", 9638 c->time); 9639 report(c->flags == flags[ACCESS_VMREAD], 9640 "ALU flags after VMREAD (%lx) are as expected (%lx)", 9641 c->flags, flags[ACCESS_VMREAD]); 9642 if (good_shadow) 9643 report(c->value == 0, 9644 "value read from shadow (%lx) is as expected (%lx)", 9645 c->value, 0ul); 9646 else if (shadow != (struct vmcs *)-1ull && flags[ACCESS_VMREAD]) 9647 report(vmx_inst_error == VMXERR_UNSUPPORTED_VMCS_COMPONENT, 9648 "VMX_INST_ERROR (%d) is as expected (%d)", 9649 vmx_inst_error, VMXERR_UNSUPPORTED_VMCS_COMPONENT); 9650 report_prefix_pop(); 9651 9652 out: 9653 report_prefix_pop(); 9654 } 9655 9656 static void vmx_vmcs_shadow_test_body(u8 *bitmap[2]) 9657 { 9658 unsigned base; 9659 unsigned index; 9660 unsigned bit; 9661 unsigned highest_index = rdmsr(MSR_IA32_VMX_VMCS_ENUM); 9662 9663 /* Run test on all possible valid VMCS fields */ 9664 for (base = 0; 9665 base < (1 << VMCS_FIELD_RESERVED_SHIFT); 9666 base += (1 << VMCS_FIELD_TYPE_SHIFT)) 9667 for (index = 0; index <= highest_index; index++) 9668 vmcs_shadow_test_field(bitmap, base + index); 9669 9670 /* 9671 * Run tests on some invalid VMCS fields 9672 * (Have reserved bit set). 9673 */ 9674 for (bit = VMCS_FIELD_RESERVED_SHIFT; bit < VMCS_FIELD_BIT_SIZE; bit++) 9675 vmcs_shadow_test_field(bitmap, (1ull << bit)); 9676 } 9677 9678 static void vmx_vmcs_shadow_test(void) 9679 { 9680 u8 *bitmap[2]; 9681 struct vmcs *shadow; 9682 9683 if (!(ctrl_cpu_rev[0].clr & CPU_SECONDARY)) { 9684 printf("\t'Activate secondary controls' not supported.\n"); 9685 return; 9686 } 9687 9688 if (!(ctrl_cpu_rev[1].clr & CPU_SHADOW_VMCS)) { 9689 printf("\t'VMCS shadowing' not supported.\n"); 9690 return; 9691 } 9692 9693 if (!(rdmsr(MSR_IA32_VMX_MISC) & 9694 MSR_IA32_VMX_MISC_VMWRITE_SHADOW_RO_FIELDS)) { 9695 printf("\tVMWRITE can't modify VM-exit information fields.\n"); 9696 return; 9697 } 9698 9699 test_set_guest(vmx_vmcs_shadow_test_guest); 9700 9701 bitmap[ACCESS_VMREAD] = alloc_page(); 9702 bitmap[ACCESS_VMWRITE] = alloc_page(); 9703 9704 vmcs_write(VMREAD_BITMAP, virt_to_phys(bitmap[ACCESS_VMREAD])); 9705 vmcs_write(VMWRITE_BITMAP, virt_to_phys(bitmap[ACCESS_VMWRITE])); 9706 9707 shadow = alloc_page(); 9708 shadow->hdr.revision_id = basic.revision; 9709 shadow->hdr.shadow_vmcs = 1; 9710 TEST_ASSERT(!vmcs_clear(shadow)); 9711 9712 vmcs_clear_bits(CPU_EXEC_CTRL0, CPU_RDTSC); 9713 vmcs_set_bits(CPU_EXEC_CTRL0, CPU_SECONDARY); 9714 vmcs_set_bits(CPU_EXEC_CTRL1, CPU_SHADOW_VMCS); 9715 9716 vmcs_write(VMCS_LINK_PTR, virt_to_phys(shadow)); 9717 report_prefix_push("valid link pointer"); 9718 vmx_vmcs_shadow_test_body(bitmap); 9719 report_prefix_pop(); 9720 9721 vmcs_write(VMCS_LINK_PTR, -1ull); 9722 report_prefix_push("invalid link pointer"); 9723 vmx_vmcs_shadow_test_body(bitmap); 9724 report_prefix_pop(); 9725 9726 l1_l2_common.op = ACCESS_NONE; 9727 enter_guest(); 9728 } 9729 9730 /* 9731 * This test monitors the difference between a guest RDTSC instruction 9732 * and the IA32_TIME_STAMP_COUNTER MSR value stored in the VMCS12 9733 * VM-exit MSR-store list when taking a VM-exit on the instruction 9734 * following RDTSC. 9735 */ 9736 #define RDTSC_DIFF_ITERS 100000 9737 #define RDTSC_DIFF_FAILS 100 9738 #define HOST_CAPTURED_GUEST_TSC_DIFF_THRESHOLD 750 9739 9740 /* 9741 * Set 'use TSC offsetting' and set the guest offset to the 9742 * inverse of the host's current TSC value, so that the guest starts running 9743 * with an effective TSC value of 0. 9744 */ 9745 static void reset_guest_tsc_to_zero(void) 9746 { 9747 vmcs_set_bits(CPU_EXEC_CTRL0, CPU_USE_TSC_OFFSET); 9748 vmcs_write(TSC_OFFSET, -rdtsc()); 9749 } 9750 9751 static void rdtsc_vmexit_diff_test_guest(void) 9752 { 9753 int i; 9754 9755 for (i = 0; i < RDTSC_DIFF_ITERS; i++) 9756 /* Ensure rdtsc is the last instruction before the vmcall. */ 9757 asm volatile("rdtsc; vmcall" : : : "eax", "edx"); 9758 } 9759 9760 /* 9761 * This function only considers the "use TSC offsetting" VM-execution 9762 * control. It does not handle "use TSC scaling" (because the latter 9763 * isn't available to the host today.) 9764 */ 9765 static unsigned long long host_time_to_guest_time(unsigned long long t) 9766 { 9767 TEST_ASSERT(!(ctrl_cpu_rev[0].clr & CPU_SECONDARY) || 9768 !(vmcs_read(CPU_EXEC_CTRL1) & CPU_USE_TSC_SCALING)); 9769 9770 if (vmcs_read(CPU_EXEC_CTRL0) & CPU_USE_TSC_OFFSET) 9771 t += vmcs_read(TSC_OFFSET); 9772 9773 return t; 9774 } 9775 9776 static unsigned long long rdtsc_vmexit_diff_test_iteration(void) 9777 { 9778 unsigned long long guest_tsc, host_to_guest_tsc; 9779 9780 enter_guest(); 9781 skip_exit_vmcall(); 9782 guest_tsc = (u32) regs.rax + (regs.rdx << 32); 9783 host_to_guest_tsc = host_time_to_guest_time(exit_msr_store[0].value); 9784 9785 return host_to_guest_tsc - guest_tsc; 9786 } 9787 9788 static void rdtsc_vmexit_diff_test(void) 9789 { 9790 int fail = 0; 9791 int i; 9792 9793 if (!(ctrl_cpu_rev[0].clr & CPU_USE_TSC_OFFSET)) 9794 test_skip("CPU doesn't support the 'use TSC offsetting' processor-based VM-execution control.\n"); 9795 9796 test_set_guest(rdtsc_vmexit_diff_test_guest); 9797 9798 reset_guest_tsc_to_zero(); 9799 9800 /* 9801 * Set up the VMCS12 VM-exit MSR-store list to store just one 9802 * MSR: IA32_TIME_STAMP_COUNTER. Note that the value stored is 9803 * in the host time domain (i.e., it is not adjusted according 9804 * to the TSC multiplier and TSC offset fields in the VMCS12, 9805 * as a guest RDTSC would be.) 9806 */ 9807 exit_msr_store = alloc_page(); 9808 exit_msr_store[0].index = MSR_IA32_TSC; 9809 vmcs_write(EXI_MSR_ST_CNT, 1); 9810 vmcs_write(EXIT_MSR_ST_ADDR, virt_to_phys(exit_msr_store)); 9811 9812 for (i = 0; i < RDTSC_DIFF_ITERS; i++) { 9813 if (rdtsc_vmexit_diff_test_iteration() >= 9814 HOST_CAPTURED_GUEST_TSC_DIFF_THRESHOLD) 9815 fail++; 9816 } 9817 9818 enter_guest(); 9819 9820 report(fail < RDTSC_DIFF_FAILS, 9821 "RDTSC to VM-exit delta too high in %d of %d iterations", 9822 fail, RDTSC_DIFF_ITERS); 9823 } 9824 9825 static int invalid_msr_init(struct vmcs *vmcs) 9826 { 9827 if (!(ctrl_pin_rev.clr & PIN_PREEMPT)) { 9828 printf("\tPreemption timer is not supported\n"); 9829 return VMX_TEST_EXIT; 9830 } 9831 vmcs_write(PIN_CONTROLS, vmcs_read(PIN_CONTROLS) | PIN_PREEMPT); 9832 preempt_val = 10000000; 9833 vmcs_write(PREEMPT_TIMER_VALUE, preempt_val); 9834 preempt_scale = rdmsr(MSR_IA32_VMX_MISC) & 0x1F; 9835 9836 if (!(ctrl_exit_rev.clr & EXI_SAVE_PREEMPT)) 9837 printf("\tSave preemption value is not supported\n"); 9838 9839 vmcs_write(ENT_MSR_LD_CNT, 1); 9840 vmcs_write(ENTER_MSR_LD_ADDR, (u64)0x13370000); 9841 9842 return VMX_TEST_START; 9843 } 9844 9845 9846 static void invalid_msr_main(void) 9847 { 9848 report(0, "Invalid MSR load"); 9849 } 9850 9851 static int invalid_msr_exit_handler(union exit_reason exit_reason) 9852 { 9853 report(0, "Invalid MSR load"); 9854 print_vmexit_info(exit_reason); 9855 return VMX_TEST_EXIT; 9856 } 9857 9858 static int invalid_msr_entry_failure(struct vmentry_result *result) 9859 { 9860 report(result->exit_reason.failed_vmentry && 9861 result->exit_reason.basic == VMX_FAIL_MSR, "Invalid MSR load"); 9862 return VMX_TEST_VMEXIT; 9863 } 9864 9865 /* 9866 * The max number of MSRs in an atomic switch MSR list is: 9867 * (111B + 1) * 512 = 4096 9868 * 9869 * Each list entry consumes: 9870 * 4-byte MSR index + 4 bytes reserved + 8-byte data = 16 bytes 9871 * 9872 * Allocate 128 kB to cover max_msr_list_size (i.e., 64 kB) and then some. 9873 */ 9874 static const u32 msr_list_page_order = 5; 9875 9876 static void atomic_switch_msr_limit_test_guest(void) 9877 { 9878 vmcall(); 9879 } 9880 9881 static void populate_msr_list(struct vmx_msr_entry *msr_list, 9882 size_t byte_capacity, int count) 9883 { 9884 int i; 9885 9886 for (i = 0; i < count; i++) { 9887 msr_list[i].index = MSR_IA32_TSC; 9888 msr_list[i].reserved = 0; 9889 msr_list[i].value = 0x1234567890abcdef; 9890 } 9891 9892 memset(msr_list + count, 0xff, 9893 byte_capacity - count * sizeof(*msr_list)); 9894 } 9895 9896 static int max_msr_list_size(void) 9897 { 9898 u32 vmx_misc = rdmsr(MSR_IA32_VMX_MISC); 9899 u32 factor = ((vmx_misc & GENMASK(27, 25)) >> 25) + 1; 9900 9901 return factor * 512; 9902 } 9903 9904 static void atomic_switch_msrs_test(int count) 9905 { 9906 struct vmx_msr_entry *vm_enter_load; 9907 struct vmx_msr_entry *vm_exit_load; 9908 struct vmx_msr_entry *vm_exit_store; 9909 int max_allowed = max_msr_list_size(); 9910 int byte_capacity = 1ul << (msr_list_page_order + PAGE_SHIFT); 9911 /* Exceeding the max MSR list size at exit trigers KVM to abort. */ 9912 int exit_count = count > max_allowed ? max_allowed : count; 9913 int cleanup_count = count > max_allowed ? 2 : 1; 9914 int i; 9915 9916 /* 9917 * Check for the IA32_TSC MSR, 9918 * available with the "TSC flag" and used to populate the MSR lists. 9919 */ 9920 if (!(cpuid(1).d & (1 << 4))) { 9921 report_skip(__func__); 9922 return; 9923 } 9924 9925 /* Set L2 guest. */ 9926 test_set_guest(atomic_switch_msr_limit_test_guest); 9927 9928 /* Setup atomic MSR switch lists. */ 9929 vm_enter_load = alloc_pages(msr_list_page_order); 9930 vm_exit_load = alloc_pages(msr_list_page_order); 9931 vm_exit_store = alloc_pages(msr_list_page_order); 9932 9933 vmcs_write(ENTER_MSR_LD_ADDR, (u64)vm_enter_load); 9934 vmcs_write(EXIT_MSR_LD_ADDR, (u64)vm_exit_load); 9935 vmcs_write(EXIT_MSR_ST_ADDR, (u64)vm_exit_store); 9936 9937 /* 9938 * VM-Enter should succeed up to the max number of MSRs per list, and 9939 * should not consume junk beyond the last entry. 9940 */ 9941 populate_msr_list(vm_enter_load, byte_capacity, count); 9942 populate_msr_list(vm_exit_load, byte_capacity, exit_count); 9943 populate_msr_list(vm_exit_store, byte_capacity, exit_count); 9944 9945 vmcs_write(ENT_MSR_LD_CNT, count); 9946 vmcs_write(EXI_MSR_LD_CNT, exit_count); 9947 vmcs_write(EXI_MSR_ST_CNT, exit_count); 9948 9949 if (count <= max_allowed) { 9950 enter_guest(); 9951 assert_exit_reason(VMX_VMCALL); 9952 skip_exit_vmcall(); 9953 } else { 9954 u32 exit_qual; 9955 9956 test_guest_state("Invalid MSR Load Count", true, count, 9957 "ENT_MSR_LD_CNT"); 9958 9959 exit_qual = vmcs_read(EXI_QUALIFICATION); 9960 report(exit_qual == max_allowed + 1, "exit_qual, %u, is %u.", 9961 exit_qual, max_allowed + 1); 9962 } 9963 9964 /* Cleanup. */ 9965 vmcs_write(ENT_MSR_LD_CNT, 0); 9966 vmcs_write(EXI_MSR_LD_CNT, 0); 9967 vmcs_write(EXI_MSR_ST_CNT, 0); 9968 for (i = 0; i < cleanup_count; i++) { 9969 enter_guest(); 9970 skip_exit_vmcall(); 9971 } 9972 free_pages_by_order(vm_enter_load, msr_list_page_order); 9973 free_pages_by_order(vm_exit_load, msr_list_page_order); 9974 free_pages_by_order(vm_exit_store, msr_list_page_order); 9975 } 9976 9977 static void atomic_switch_max_msrs_test(void) 9978 { 9979 atomic_switch_msrs_test(max_msr_list_size()); 9980 } 9981 9982 static void atomic_switch_overflow_msrs_test(void) 9983 { 9984 if (test_device_enabled()) 9985 atomic_switch_msrs_test(max_msr_list_size() + 1); 9986 else 9987 test_skip("Test is only supported on KVM"); 9988 } 9989 9990 #define TEST(name) { #name, .v2 = name } 9991 9992 /* name/init/guest_main/exit_handler/syscall_handler/guest_regs */ 9993 struct vmx_test vmx_tests[] = { 9994 { "null", NULL, basic_guest_main, basic_exit_handler, NULL, {0} }, 9995 { "vmenter", NULL, vmenter_main, vmenter_exit_handler, NULL, {0} }, 9996 { "preemption timer", preemption_timer_init, preemption_timer_main, 9997 preemption_timer_exit_handler, NULL, {0} }, 9998 { "control field PAT", test_ctrl_pat_init, test_ctrl_pat_main, 9999 test_ctrl_pat_exit_handler, NULL, {0} }, 10000 { "control field EFER", test_ctrl_efer_init, test_ctrl_efer_main, 10001 test_ctrl_efer_exit_handler, NULL, {0} }, 10002 { "CR shadowing", NULL, cr_shadowing_main, 10003 cr_shadowing_exit_handler, NULL, {0} }, 10004 { "I/O bitmap", iobmp_init, iobmp_main, iobmp_exit_handler, 10005 NULL, {0} }, 10006 { "instruction intercept", insn_intercept_init, insn_intercept_main, 10007 insn_intercept_exit_handler, NULL, {0} }, 10008 { "EPT A/D disabled", ept_init, ept_main, ept_exit_handler, NULL, {0} }, 10009 { "EPT A/D enabled", eptad_init, eptad_main, eptad_exit_handler, NULL, {0} }, 10010 { "PML", pml_init, pml_main, pml_exit_handler, NULL, {0} }, 10011 { "VPID", vpid_init, vpid_main, vpid_exit_handler, NULL, {0} }, 10012 { "interrupt", interrupt_init, interrupt_main, 10013 interrupt_exit_handler, NULL, {0} }, 10014 { "nmi_hlt", nmi_hlt_init, nmi_hlt_main, 10015 nmi_hlt_exit_handler, NULL, {0} }, 10016 { "debug controls", dbgctls_init, dbgctls_main, dbgctls_exit_handler, 10017 NULL, {0} }, 10018 { "MSR switch", msr_switch_init, msr_switch_main, 10019 msr_switch_exit_handler, NULL, {0}, msr_switch_entry_failure }, 10020 { "vmmcall", vmmcall_init, vmmcall_main, vmmcall_exit_handler, NULL, {0} }, 10021 { "disable RDTSCP", disable_rdtscp_init, disable_rdtscp_main, 10022 disable_rdtscp_exit_handler, NULL, {0} }, 10023 { "int3", int3_init, int3_guest_main, int3_exit_handler, NULL, {0} }, 10024 { "into", into_init, into_guest_main, into_exit_handler, NULL, {0} }, 10025 { "exit_monitor_from_l2_test", NULL, exit_monitor_from_l2_main, 10026 exit_monitor_from_l2_handler, NULL, {0} }, 10027 { "invalid_msr", invalid_msr_init, invalid_msr_main, 10028 invalid_msr_exit_handler, NULL, {0}, invalid_msr_entry_failure}, 10029 /* Basic V2 tests. */ 10030 TEST(v2_null_test), 10031 TEST(v2_multiple_entries_test), 10032 TEST(fixture_test_case1), 10033 TEST(fixture_test_case2), 10034 /* Opcode tests. */ 10035 TEST(invvpid_test_v2), 10036 /* VM-entry tests */ 10037 TEST(vmx_controls_test), 10038 TEST(vmx_host_state_area_test), 10039 TEST(vmx_guest_state_area_test), 10040 TEST(vmentry_movss_shadow_test), 10041 /* APICv tests */ 10042 TEST(vmx_eoi_bitmap_ioapic_scan_test), 10043 TEST(vmx_hlt_with_rvi_test), 10044 TEST(apic_reg_virt_test), 10045 TEST(virt_x2apic_mode_test), 10046 /* APIC pass-through tests */ 10047 TEST(vmx_apic_passthrough_test), 10048 TEST(vmx_apic_passthrough_thread_test), 10049 TEST(vmx_apic_passthrough_tpr_threshold_test), 10050 TEST(vmx_init_signal_test), 10051 /* VMCS Shadowing tests */ 10052 TEST(vmx_vmcs_shadow_test), 10053 /* Regression tests */ 10054 TEST(vmx_cr_load_test), 10055 TEST(vmx_nm_test), 10056 TEST(vmx_db_test), 10057 TEST(vmx_nmi_window_test), 10058 TEST(vmx_intr_window_test), 10059 TEST(vmx_pending_event_test), 10060 TEST(vmx_pending_event_hlt_test), 10061 TEST(vmx_store_tsc_test), 10062 TEST(vmx_preemption_timer_zero_test), 10063 TEST(vmx_preemption_timer_tf_test), 10064 TEST(vmx_preemption_timer_expiry_test), 10065 /* EPT access tests. */ 10066 TEST(ept_access_test_not_present), 10067 TEST(ept_access_test_read_only), 10068 TEST(ept_access_test_write_only), 10069 TEST(ept_access_test_read_write), 10070 TEST(ept_access_test_execute_only), 10071 TEST(ept_access_test_read_execute), 10072 TEST(ept_access_test_write_execute), 10073 TEST(ept_access_test_read_write_execute), 10074 TEST(ept_access_test_reserved_bits), 10075 TEST(ept_access_test_ignored_bits), 10076 TEST(ept_access_test_paddr_not_present_ad_disabled), 10077 TEST(ept_access_test_paddr_not_present_ad_enabled), 10078 TEST(ept_access_test_paddr_read_only_ad_disabled), 10079 TEST(ept_access_test_paddr_read_only_ad_enabled), 10080 TEST(ept_access_test_paddr_read_write), 10081 TEST(ept_access_test_paddr_read_write_execute), 10082 TEST(ept_access_test_paddr_read_execute_ad_disabled), 10083 TEST(ept_access_test_paddr_read_execute_ad_enabled), 10084 TEST(ept_access_test_paddr_not_present_page_fault), 10085 TEST(ept_access_test_force_2m_page), 10086 /* Atomic MSR switch tests. */ 10087 TEST(atomic_switch_max_msrs_test), 10088 TEST(atomic_switch_overflow_msrs_test), 10089 TEST(rdtsc_vmexit_diff_test), 10090 TEST(vmx_mtf_test), 10091 { NULL, NULL, NULL, NULL, NULL, {0} }, 10092 }; 10093