1 #include "kvm/builtin-run.h" 2 3 #include "kvm/builtin-setup.h" 4 #include "kvm/virtio-balloon.h" 5 #include "kvm/virtio-console.h" 6 #include "kvm/parse-options.h" 7 #include "kvm/8250-serial.h" 8 #include "kvm/framebuffer.h" 9 #include "kvm/disk-image.h" 10 #include "kvm/threadpool.h" 11 #include "kvm/virtio-scsi.h" 12 #include "kvm/virtio-blk.h" 13 #include "kvm/virtio-net.h" 14 #include "kvm/virtio-rng.h" 15 #include "kvm/ioeventfd.h" 16 #include "kvm/virtio-9p.h" 17 #include "kvm/barrier.h" 18 #include "kvm/kvm-cpu.h" 19 #include "kvm/ioport.h" 20 #include "kvm/symbol.h" 21 #include "kvm/i8042.h" 22 #include "kvm/mutex.h" 23 #include "kvm/term.h" 24 #include "kvm/util.h" 25 #include "kvm/strbuf.h" 26 #include "kvm/vesa.h" 27 #include "kvm/irq.h" 28 #include "kvm/kvm.h" 29 #include "kvm/pci.h" 30 #include "kvm/rtc.h" 31 #include "kvm/sdl.h" 32 #include "kvm/vnc.h" 33 #include "kvm/guest_compat.h" 34 #include "kvm/kvm-ipc.h" 35 #include "kvm/builtin-debug.h" 36 37 #include <linux/types.h> 38 #include <linux/err.h> 39 40 #include <sys/utsname.h> 41 #include <sys/types.h> 42 #include <sys/stat.h> 43 #include <termios.h> 44 #include <signal.h> 45 #include <stdlib.h> 46 #include <string.h> 47 #include <unistd.h> 48 #include <ctype.h> 49 #include <stdio.h> 50 51 #define MB_SHIFT (20) 52 #define KB_SHIFT (10) 53 #define GB_SHIFT (30) 54 55 __thread struct kvm_cpu *current_kvm_cpu; 56 57 static int kvm_run_wrapper; 58 59 bool do_debug_print = false; 60 61 static const char * const run_usage[] = { 62 "lkvm run [<options>] [<kernel image>]", 63 NULL 64 }; 65 66 enum { 67 KVM_RUN_DEFAULT, 68 KVM_RUN_SANDBOX, 69 }; 70 71 static int img_name_parser(const struct option *opt, const char *arg, int unset) 72 { 73 char path[PATH_MAX]; 74 struct stat st; 75 76 snprintf(path, PATH_MAX, "%s%s", kvm__get_dir(), arg); 77 78 if ((stat(arg, &st) == 0 && S_ISDIR(st.st_mode)) || 79 (stat(path, &st) == 0 && S_ISDIR(st.st_mode))) 80 return virtio_9p_img_name_parser(opt, arg, unset); 81 return disk_img_name_parser(opt, arg, unset); 82 } 83 84 void kvm_run_set_wrapper_sandbox(void) 85 { 86 kvm_run_wrapper = KVM_RUN_SANDBOX; 87 } 88 89 #ifndef OPT_ARCH_RUN 90 #define OPT_ARCH_RUN(...) 91 #endif 92 93 #define BUILD_OPTIONS(name, cfg, kvm) \ 94 struct option name[] = { \ 95 OPT_GROUP("Basic options:"), \ 96 OPT_STRING('\0', "name", &(cfg)->guest_name, "guest name", \ 97 "A name for the guest"), \ 98 OPT_INTEGER('c', "cpus", &(cfg)->nrcpus, "Number of CPUs"), \ 99 OPT_U64('m', "mem", &(cfg)->ram_size, "Virtual machine memory" \ 100 " size in MiB."), \ 101 OPT_CALLBACK('d', "disk", kvm, "image or rootfs_dir", "Disk " \ 102 " image or rootfs directory", img_name_parser, \ 103 kvm), \ 104 OPT_BOOLEAN('\0', "balloon", &(cfg)->balloon, "Enable virtio" \ 105 " balloon"), \ 106 OPT_BOOLEAN('\0', "vnc", &(cfg)->vnc, "Enable VNC framebuffer"),\ 107 OPT_BOOLEAN('\0', "gtk", &(cfg)->gtk, "Enable GTK framebuffer"),\ 108 OPT_BOOLEAN('\0', "sdl", &(cfg)->sdl, "Enable SDL framebuffer"),\ 109 OPT_BOOLEAN('\0', "rng", &(cfg)->virtio_rng, "Enable virtio" \ 110 " Random Number Generator"), \ 111 OPT_BOOLEAN('\0', "nodefaults", &(cfg)->nodefaults, "Disable" \ 112 " implicit configuration that cannot be" \ 113 " disabled otherwise"), \ 114 OPT_CALLBACK('\0', "9p", NULL, "dir_to_share,tag_name", \ 115 "Enable virtio 9p to share files between host and" \ 116 " guest", virtio_9p_rootdir_parser, kvm), \ 117 OPT_STRING('\0', "console", &(cfg)->console, "serial, virtio or"\ 118 " hv", "Console to use"), \ 119 OPT_U64('\0', "vsock", &(cfg)->vsock_cid, \ 120 "Guest virtio socket CID"), \ 121 OPT_STRING('\0', "dev", &(cfg)->dev, "device_file", \ 122 "KVM device file"), \ 123 OPT_CALLBACK('\0', "tty", NULL, "tty id", \ 124 "Remap guest TTY into a pty on the host", \ 125 tty_parser, NULL), \ 126 OPT_STRING('\0', "sandbox", &(cfg)->sandbox, "script", \ 127 "Run this script when booting into custom" \ 128 " rootfs"), \ 129 OPT_STRING('\0', "hugetlbfs", &(cfg)->hugetlbfs_path, "path", \ 130 "Hugetlbfs path"), \ 131 \ 132 OPT_GROUP("Kernel options:"), \ 133 OPT_STRING('k', "kernel", &(cfg)->kernel_filename, "kernel", \ 134 "Kernel to boot in virtual machine"), \ 135 OPT_STRING('i', "initrd", &(cfg)->initrd_filename, "initrd", \ 136 "Initial RAM disk image"), \ 137 OPT_STRING('p', "params", &(cfg)->kernel_cmdline, "params", \ 138 "Kernel command line arguments"), \ 139 OPT_STRING('f', "firmware", &(cfg)->firmware_filename, "firmware",\ 140 "Firmware image to boot in virtual machine"), \ 141 OPT_STRING('F', "flash", &(cfg)->flash_filename, "flash",\ 142 "Flash image to present to virtual machine"), \ 143 \ 144 OPT_GROUP("Networking options:"), \ 145 OPT_CALLBACK_DEFAULT('n', "network", NULL, "network params", \ 146 "Create a new guest NIC", \ 147 netdev_parser, NULL, kvm), \ 148 OPT_BOOLEAN('\0', "no-dhcp", &(cfg)->no_dhcp, "Disable kernel" \ 149 " DHCP in rootfs mode"), \ 150 \ 151 OPT_GROUP("VFIO options:"), \ 152 OPT_CALLBACK('\0', "vfio-pci", NULL, "[domain:]bus:dev.fn", \ 153 "Assign a PCI device to the virtual machine", \ 154 vfio_device_parser, kvm), \ 155 \ 156 OPT_GROUP("Debug options:"), \ 157 OPT_BOOLEAN('\0', "debug", &do_debug_print, \ 158 "Enable debug messages"), \ 159 OPT_BOOLEAN('\0', "debug-single-step", &(cfg)->single_step, \ 160 "Enable single stepping"), \ 161 OPT_BOOLEAN('\0', "debug-ioport", &(cfg)->ioport_debug, \ 162 "Enable ioport debugging"), \ 163 OPT_BOOLEAN('\0', "debug-mmio", &(cfg)->mmio_debug, \ 164 "Enable MMIO debugging"), \ 165 OPT_INTEGER('\0', "debug-iodelay", &(cfg)->debug_iodelay, \ 166 "Delay IO by millisecond"), \ 167 \ 168 OPT_ARCH(RUN, cfg) \ 169 OPT_END() \ 170 }; 171 172 static void *kvm_cpu_thread(void *arg) 173 { 174 char name[16]; 175 176 current_kvm_cpu = arg; 177 178 sprintf(name, "kvm-vcpu-%lu", current_kvm_cpu->cpu_id); 179 kvm__set_thread_name(name); 180 181 if (kvm_cpu__start(current_kvm_cpu)) 182 goto panic_kvm; 183 184 return (void *) (intptr_t) 0; 185 186 panic_kvm: 187 fprintf(stderr, "KVM exit reason: %u (\"%s\")\n", 188 current_kvm_cpu->kvm_run->exit_reason, 189 kvm_exit_reasons[current_kvm_cpu->kvm_run->exit_reason]); 190 if (current_kvm_cpu->kvm_run->exit_reason == KVM_EXIT_UNKNOWN) 191 fprintf(stderr, "KVM exit code: 0x%llu\n", 192 (unsigned long long)current_kvm_cpu->kvm_run->hw.hardware_exit_reason); 193 194 kvm_cpu__set_debug_fd(STDOUT_FILENO); 195 kvm_cpu__show_registers(current_kvm_cpu); 196 kvm_cpu__show_code(current_kvm_cpu); 197 kvm_cpu__show_page_tables(current_kvm_cpu); 198 199 return (void *) (intptr_t) 1; 200 } 201 202 static char kernel[PATH_MAX]; 203 204 static const char *host_kernels[] = { 205 "/boot/vmlinuz", 206 "/boot/bzImage", 207 NULL 208 }; 209 210 static const char *default_kernels[] = { 211 "./bzImage", 212 "arch/" BUILD_ARCH "/boot/bzImage", 213 "../../arch/" BUILD_ARCH "/boot/bzImage", 214 NULL 215 }; 216 217 static const char *default_vmlinux[] = { 218 "vmlinux", 219 "../../../vmlinux", 220 "../../vmlinux", 221 NULL 222 }; 223 224 static void kernel_usage_with_options(void) 225 { 226 const char **k; 227 struct utsname uts; 228 229 fprintf(stderr, "Fatal: could not find default kernel image in:\n"); 230 k = &default_kernels[0]; 231 while (*k) { 232 fprintf(stderr, "\t%s\n", *k); 233 k++; 234 } 235 236 if (uname(&uts) < 0) 237 return; 238 239 k = &host_kernels[0]; 240 while (*k) { 241 if (snprintf(kernel, PATH_MAX, "%s-%s", *k, uts.release) < 0) 242 return; 243 fprintf(stderr, "\t%s\n", kernel); 244 k++; 245 } 246 fprintf(stderr, "\nPlease see '%s run --help' for more options.\n\n", 247 KVM_BINARY_NAME); 248 } 249 250 static u64 host_ram_size(void) 251 { 252 long page_size; 253 long nr_pages; 254 255 nr_pages = sysconf(_SC_PHYS_PAGES); 256 if (nr_pages < 0) { 257 pr_warning("sysconf(_SC_PHYS_PAGES) failed"); 258 return 0; 259 } 260 261 page_size = sysconf(_SC_PAGE_SIZE); 262 if (page_size < 0) { 263 pr_warning("sysconf(_SC_PAGE_SIZE) failed"); 264 return 0; 265 } 266 267 return (nr_pages * page_size) >> MB_SHIFT; 268 } 269 270 /* 271 * If user didn't specify how much memory it wants to allocate for the guest, 272 * avoid filling the whole host RAM. 273 */ 274 #define RAM_SIZE_RATIO 0.8 275 276 static u64 get_ram_size(int nr_cpus) 277 { 278 u64 available; 279 u64 ram_size; 280 281 ram_size = 64 * (nr_cpus + 3); 282 283 available = host_ram_size() * RAM_SIZE_RATIO; 284 if (!available) 285 available = MIN_RAM_SIZE_MB; 286 287 if (ram_size > available) 288 ram_size = available; 289 290 return ram_size; 291 } 292 293 static const char *find_kernel(void) 294 { 295 const char **k; 296 struct stat st; 297 struct utsname uts; 298 299 k = &default_kernels[0]; 300 while (*k) { 301 if (stat(*k, &st) < 0 || !S_ISREG(st.st_mode)) { 302 k++; 303 continue; 304 } 305 strlcpy(kernel, *k, PATH_MAX); 306 return kernel; 307 } 308 309 if (uname(&uts) < 0) 310 return NULL; 311 312 k = &host_kernels[0]; 313 while (*k) { 314 if (snprintf(kernel, PATH_MAX, "%s-%s", *k, uts.release) < 0) 315 return NULL; 316 317 if (stat(kernel, &st) < 0 || !S_ISREG(st.st_mode)) { 318 k++; 319 continue; 320 } 321 return kernel; 322 323 } 324 return NULL; 325 } 326 327 static const char *find_vmlinux(void) 328 { 329 const char **vmlinux; 330 331 vmlinux = &default_vmlinux[0]; 332 while (*vmlinux) { 333 struct stat st; 334 335 if (stat(*vmlinux, &st) < 0 || !S_ISREG(st.st_mode)) { 336 vmlinux++; 337 continue; 338 } 339 return *vmlinux; 340 } 341 return NULL; 342 } 343 344 void kvm_run_help(void) 345 { 346 struct kvm *kvm = NULL; 347 348 BUILD_OPTIONS(options, &kvm->cfg, kvm); 349 usage_with_options(run_usage, options); 350 } 351 352 static int kvm_run_set_sandbox(struct kvm *kvm) 353 { 354 const char *guestfs_name = kvm->cfg.custom_rootfs_name; 355 char path[PATH_MAX], script[PATH_MAX], *tmp; 356 357 snprintf(path, PATH_MAX, "%s%s/virt/sandbox.sh", kvm__get_dir(), guestfs_name); 358 359 remove(path); 360 361 if (kvm->cfg.sandbox == NULL) 362 return 0; 363 364 tmp = realpath(kvm->cfg.sandbox, NULL); 365 if (tmp == NULL) 366 return -ENOMEM; 367 368 snprintf(script, PATH_MAX, "/host/%s", tmp); 369 free(tmp); 370 371 return symlink(script, path); 372 } 373 374 static void kvm_write_sandbox_cmd_exactly(int fd, const char *arg) 375 { 376 const char *single_quote; 377 378 if (!*arg) { /* zero length string */ 379 if (write(fd, "''", 2) <= 0) 380 die("Failed writing sandbox script"); 381 return; 382 } 383 384 while (*arg) { 385 single_quote = strchrnul(arg, '\''); 386 387 /* write non-single-quote string as #('string') */ 388 if (arg != single_quote) { 389 if (write(fd, "'", 1) <= 0 || 390 write(fd, arg, single_quote - arg) <= 0 || 391 write(fd, "'", 1) <= 0) 392 die("Failed writing sandbox script"); 393 } 394 395 /* write single quote as #("'") */ 396 if (*single_quote) { 397 if (write(fd, "\"'\"", 3) <= 0) 398 die("Failed writing sandbox script"); 399 } else 400 break; 401 402 arg = single_quote + 1; 403 } 404 } 405 406 static void resolve_program(const char *src, char *dst, size_t len) 407 { 408 struct stat st; 409 int err; 410 411 err = stat(src, &st); 412 413 if (!err && S_ISREG(st.st_mode)) { 414 char resolved_path[PATH_MAX]; 415 416 if (!realpath(src, resolved_path)) 417 die("Unable to resolve program %s: %s\n", src, strerror(errno)); 418 419 if (snprintf(dst, len, "/host%s", resolved_path) >= (int)len) 420 die("Pathname too long: %s -> %s\n", src, resolved_path); 421 422 } else 423 strlcpy(dst, src, len); 424 } 425 426 static void kvm_run_write_sandbox_cmd(struct kvm *kvm, const char **argv, int argc) 427 { 428 const char script_hdr[] = "#! /bin/bash\n\n"; 429 char program[PATH_MAX]; 430 int fd; 431 432 remove(kvm->cfg.sandbox); 433 434 fd = open(kvm->cfg.sandbox, O_RDWR | O_CREAT, 0777); 435 if (fd < 0) 436 die("Failed creating sandbox script"); 437 438 if (write(fd, script_hdr, sizeof(script_hdr) - 1) <= 0) 439 die("Failed writing sandbox script"); 440 441 resolve_program(argv[0], program, PATH_MAX); 442 kvm_write_sandbox_cmd_exactly(fd, program); 443 444 argv++; 445 argc--; 446 447 while (argc) { 448 if (write(fd, " ", 1) <= 0) 449 die("Failed writing sandbox script"); 450 451 kvm_write_sandbox_cmd_exactly(fd, argv[0]); 452 argv++; 453 argc--; 454 } 455 if (write(fd, "\n", 1) <= 0) 456 die("Failed writing sandbox script"); 457 458 close(fd); 459 } 460 461 static void kvm_run_set_real_cmdline(struct kvm *kvm) 462 { 463 static char real_cmdline[2048]; 464 bool video; 465 466 video = kvm->cfg.vnc || kvm->cfg.sdl || kvm->cfg.gtk; 467 468 memset(real_cmdline, 0, sizeof(real_cmdline)); 469 kvm__arch_set_cmdline(real_cmdline, video); 470 471 if (video) { 472 strcat(real_cmdline, " console=tty0"); 473 } else { 474 switch (kvm->cfg.active_console) { 475 case CONSOLE_HV: 476 /* Fallthrough */ 477 case CONSOLE_VIRTIO: 478 strcat(real_cmdline, " console=hvc0"); 479 break; 480 case CONSOLE_8250: 481 strcat(real_cmdline, " console=ttyS0"); 482 break; 483 } 484 } 485 486 if (kvm->cfg.using_rootfs) { 487 strcat(real_cmdline, " rw rootflags=trans=virtio,version=9p2000.L,cache=loose rootfstype=9p"); 488 if (kvm->cfg.custom_rootfs) { 489 #ifdef CONFIG_GUEST_PRE_INIT 490 strcat(real_cmdline, " init=/virt/pre_init"); 491 #else 492 strcat(real_cmdline, " init=/virt/init"); 493 #endif 494 if (!kvm->cfg.no_dhcp) 495 strcat(real_cmdline, " ip=dhcp"); 496 } 497 } else if (!kvm->cfg.kernel_cmdline || !strstr(kvm->cfg.kernel_cmdline, "root=")) { 498 strlcat(real_cmdline, " root=/dev/vda rw ", sizeof(real_cmdline)); 499 } 500 501 if (kvm->cfg.kernel_cmdline) { 502 strcat(real_cmdline, " "); 503 strlcat(real_cmdline, kvm->cfg.kernel_cmdline, sizeof(real_cmdline)); 504 } 505 506 kvm->cfg.real_cmdline = real_cmdline; 507 } 508 509 static void kvm_run_validate_cfg(struct kvm *kvm) 510 { 511 if (kvm->cfg.kernel_filename && kvm->cfg.firmware_filename) 512 die("Only one of --kernel or --firmware can be specified"); 513 514 if ((kvm->cfg.vnc && (kvm->cfg.sdl || kvm->cfg.gtk)) || 515 (kvm->cfg.sdl && kvm->cfg.gtk)) 516 die("Only one of --vnc, --sdl or --gtk can be specified"); 517 518 if (kvm->cfg.firmware_filename && kvm->cfg.initrd_filename) 519 pr_warning("Ignoring initrd file when loading a firmware image"); 520 } 521 522 static struct kvm *kvm_cmd_run_init(int argc, const char **argv) 523 { 524 static char default_name[20]; 525 unsigned int nr_online_cpus; 526 struct kvm *kvm = kvm__new(); 527 528 if (IS_ERR(kvm)) 529 return kvm; 530 531 nr_online_cpus = sysconf(_SC_NPROCESSORS_ONLN); 532 kvm->cfg.custom_rootfs_name = "default"; 533 534 while (argc != 0) { 535 BUILD_OPTIONS(options, &kvm->cfg, kvm); 536 argc = parse_options(argc, argv, options, run_usage, 537 PARSE_OPT_STOP_AT_NON_OPTION | 538 PARSE_OPT_KEEP_DASHDASH); 539 if (argc != 0) { 540 /* Cusrom options, should have been handled elsewhere */ 541 if (strcmp(argv[0], "--") == 0) { 542 if (kvm_run_wrapper == KVM_RUN_SANDBOX) { 543 kvm->cfg.sandbox = DEFAULT_SANDBOX_FILENAME; 544 kvm_run_write_sandbox_cmd(kvm, argv+1, argc-1); 545 break; 546 } 547 } 548 549 if ((kvm_run_wrapper == KVM_RUN_DEFAULT && kvm->cfg.kernel_filename) || 550 (kvm_run_wrapper == KVM_RUN_SANDBOX && kvm->cfg.sandbox)) { 551 fprintf(stderr, "Cannot handle parameter: " 552 "%s\n", argv[0]); 553 usage_with_options(run_usage, options); 554 free(kvm); 555 return ERR_PTR(-EINVAL); 556 } 557 if (kvm_run_wrapper == KVM_RUN_SANDBOX) { 558 /* 559 * first unhandled parameter is treated as 560 * sandbox command 561 */ 562 kvm->cfg.sandbox = DEFAULT_SANDBOX_FILENAME; 563 kvm_run_write_sandbox_cmd(kvm, argv, argc); 564 } else { 565 /* 566 * first unhandled parameter is treated as a kernel 567 * image 568 */ 569 kvm->cfg.kernel_filename = argv[0]; 570 } 571 argv++; 572 argc--; 573 } 574 575 } 576 577 kvm_run_validate_cfg(kvm); 578 579 if (!kvm->cfg.kernel_filename && !kvm->cfg.firmware_filename) { 580 kvm->cfg.kernel_filename = find_kernel(); 581 582 if (!kvm->cfg.kernel_filename) { 583 kernel_usage_with_options(); 584 return ERR_PTR(-EINVAL); 585 } 586 } 587 588 if (kvm->cfg.kernel_filename) { 589 kvm->cfg.vmlinux_filename = find_vmlinux(); 590 kvm->vmlinux = kvm->cfg.vmlinux_filename; 591 } 592 593 if (kvm->cfg.nrcpus == 0) 594 kvm->cfg.nrcpus = nr_online_cpus; 595 596 if (!kvm->cfg.ram_size) 597 kvm->cfg.ram_size = get_ram_size(kvm->cfg.nrcpus); 598 599 if (kvm->cfg.ram_size > host_ram_size()) 600 pr_warning("Guest memory size %lluMB exceeds host physical RAM size %lluMB", 601 (unsigned long long)kvm->cfg.ram_size, 602 (unsigned long long)host_ram_size()); 603 604 kvm->cfg.ram_size <<= MB_SHIFT; 605 606 if (!kvm->cfg.dev) 607 kvm->cfg.dev = DEFAULT_KVM_DEV; 608 609 if (!kvm->cfg.console) 610 kvm->cfg.console = DEFAULT_CONSOLE; 611 612 if (!strncmp(kvm->cfg.console, "virtio", 6)) 613 kvm->cfg.active_console = CONSOLE_VIRTIO; 614 else if (!strncmp(kvm->cfg.console, "serial", 6)) 615 kvm->cfg.active_console = CONSOLE_8250; 616 else if (!strncmp(kvm->cfg.console, "hv", 2)) 617 kvm->cfg.active_console = CONSOLE_HV; 618 else 619 pr_warning("No console!"); 620 621 if (!kvm->cfg.host_ip) 622 kvm->cfg.host_ip = DEFAULT_HOST_ADDR; 623 624 if (!kvm->cfg.guest_ip) 625 kvm->cfg.guest_ip = DEFAULT_GUEST_ADDR; 626 627 if (!kvm->cfg.guest_mac) 628 kvm->cfg.guest_mac = DEFAULT_GUEST_MAC; 629 630 if (!kvm->cfg.host_mac) 631 kvm->cfg.host_mac = DEFAULT_HOST_MAC; 632 633 if (!kvm->cfg.script) 634 kvm->cfg.script = DEFAULT_SCRIPT; 635 636 if (!kvm->cfg.network) 637 kvm->cfg.network = DEFAULT_NETWORK; 638 639 if (!kvm->cfg.guest_name) { 640 if (kvm->cfg.custom_rootfs) { 641 kvm->cfg.guest_name = kvm->cfg.custom_rootfs_name; 642 } else { 643 sprintf(default_name, "guest-%u", getpid()); 644 kvm->cfg.guest_name = default_name; 645 } 646 } 647 648 if (!kvm->cfg.nodefaults && 649 !kvm->cfg.using_rootfs && 650 !kvm->cfg.disk_image[0].filename && 651 !kvm->cfg.initrd_filename) { 652 char tmp[PATH_MAX]; 653 654 kvm_setup_create_new(kvm->cfg.custom_rootfs_name); 655 kvm_setup_resolv(kvm->cfg.custom_rootfs_name); 656 657 snprintf(tmp, PATH_MAX, "%s%s", kvm__get_dir(), "default"); 658 if (virtio_9p__register(kvm, tmp, "/dev/root") < 0) 659 die("Unable to initialize virtio 9p"); 660 if (virtio_9p__register(kvm, "/", "hostfs") < 0) 661 die("Unable to initialize virtio 9p"); 662 kvm->cfg.using_rootfs = kvm->cfg.custom_rootfs = 1; 663 } 664 665 if (kvm->cfg.custom_rootfs) { 666 kvm_run_set_sandbox(kvm); 667 if (kvm_setup_guest_init(kvm->cfg.custom_rootfs_name)) 668 die("Failed to setup init for guest."); 669 } 670 671 if (kvm->cfg.nodefaults) 672 kvm->cfg.real_cmdline = kvm->cfg.kernel_cmdline; 673 else 674 kvm_run_set_real_cmdline(kvm); 675 676 if (kvm->cfg.kernel_filename) { 677 printf(" # %s run -k %s -m %Lu -c %d --name %s\n", KVM_BINARY_NAME, 678 kvm->cfg.kernel_filename, 679 (unsigned long long)kvm->cfg.ram_size / 1024 / 1024, 680 kvm->cfg.nrcpus, kvm->cfg.guest_name); 681 } else if (kvm->cfg.firmware_filename) { 682 printf(" # %s run --firmware %s -m %Lu -c %d --name %s\n", KVM_BINARY_NAME, 683 kvm->cfg.firmware_filename, 684 (unsigned long long)kvm->cfg.ram_size / 1024 / 1024, 685 kvm->cfg.nrcpus, kvm->cfg.guest_name); 686 } 687 688 if (init_list__init(kvm) < 0) 689 die ("Initialisation failed"); 690 691 return kvm; 692 } 693 694 static int kvm_cmd_run_work(struct kvm *kvm) 695 { 696 int i; 697 698 for (i = 0; i < kvm->nrcpus; i++) { 699 if (pthread_create(&kvm->cpus[i]->thread, NULL, kvm_cpu_thread, kvm->cpus[i]) != 0) 700 die("unable to create KVM VCPU thread"); 701 } 702 703 /* Only VCPU #0 is going to exit by itself when shutting down */ 704 if (pthread_join(kvm->cpus[0]->thread, NULL) != 0) 705 die("unable to join with vcpu 0"); 706 707 return kvm_cpu__exit(kvm); 708 } 709 710 static void kvm_cmd_run_exit(struct kvm *kvm, int guest_ret) 711 { 712 compat__print_all_messages(); 713 714 init_list__exit(kvm); 715 716 if (guest_ret == 0) 717 printf("\n # KVM session ended normally.\n"); 718 } 719 720 int kvm_cmd_run(int argc, const char **argv, const char *prefix) 721 { 722 int ret = -EFAULT; 723 struct kvm *kvm; 724 725 kvm = kvm_cmd_run_init(argc, argv); 726 if (IS_ERR(kvm)) 727 return PTR_ERR(kvm); 728 729 ret = kvm_cmd_run_work(kvm); 730 kvm_cmd_run_exit(kvm, ret); 731 732 return ret; 733 } 734