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-blk.h" 12 #include "kvm/virtio-net.h" 13 #include "kvm/virtio-rng.h" 14 #include "kvm/ioeventfd.h" 15 #include "kvm/virtio-9p.h" 16 #include "kvm/barrier.h" 17 #include "kvm/kvm-cpu.h" 18 #include "kvm/ioport.h" 19 #include "kvm/symbol.h" 20 #include "kvm/i8042.h" 21 #include "kvm/mutex.h" 22 #include "kvm/term.h" 23 #include "kvm/util.h" 24 #include "kvm/strbuf.h" 25 #include "kvm/vesa.h" 26 #include "kvm/irq.h" 27 #include "kvm/kvm.h" 28 #include "kvm/pci.h" 29 #include "kvm/rtc.h" 30 #include "kvm/sdl.h" 31 #include "kvm/vnc.h" 32 #include "kvm/guest_compat.h" 33 #include "kvm/pci-shmem.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 DEFAULT_KVM_DEV "/dev/kvm" 52 #define DEFAULT_CONSOLE "serial" 53 #define DEFAULT_NETWORK "user" 54 #define DEFAULT_HOST_ADDR "192.168.33.1" 55 #define DEFAULT_GUEST_ADDR "192.168.33.15" 56 #define DEFAULT_GUEST_MAC "02:15:15:15:15:15" 57 #define DEFAULT_HOST_MAC "02:01:01:01:01:01" 58 #define DEFAULT_SCRIPT "none" 59 const char *DEFAULT_SANDBOX_FILENAME = "guest/sandbox.sh"; 60 61 #define MB_SHIFT (20) 62 #define KB_SHIFT (10) 63 #define GB_SHIFT (30) 64 #define MIN_RAM_SIZE_MB (64ULL) 65 #define MIN_RAM_SIZE_BYTE (MIN_RAM_SIZE_MB << MB_SHIFT) 66 67 struct kvm *kvm; 68 struct kvm_cpu **kvm_cpus; 69 __thread struct kvm_cpu *current_kvm_cpu; 70 71 static u64 ram_size; 72 static u8 image_count; 73 static u8 num_net_devices; 74 static bool virtio_rng; 75 static const char *kernel_cmdline; 76 static const char *kernel_filename; 77 static const char *vmlinux_filename; 78 static const char *initrd_filename; 79 static const char *firmware_filename; 80 static const char *image_filename[MAX_DISK_IMAGES]; 81 static const char *console; 82 static const char *dev; 83 static const char *network; 84 static const char *host_ip; 85 static const char *guest_ip; 86 static const char *guest_mac; 87 static const char *host_mac; 88 static const char *script; 89 static const char *guest_name; 90 static const char *sandbox; 91 static const char *hugetlbfs_path; 92 static const char *custom_rootfs_name = "default"; 93 static struct virtio_net_params *net_params; 94 static bool single_step; 95 static bool readonly_image[MAX_DISK_IMAGES]; 96 static bool vnc; 97 static bool sdl; 98 static bool balloon; 99 static bool using_rootfs; 100 static bool custom_rootfs; 101 static bool no_net; 102 static bool no_dhcp; 103 extern bool ioport_debug; 104 static int kvm_run_wrapper; 105 extern int active_console; 106 extern int debug_iodelay; 107 108 bool do_debug_print = false; 109 110 static int nrcpus; 111 static int vidmode = -1; 112 113 static const char * const run_usage[] = { 114 "lkvm run [<options>] [<kernel image>]", 115 NULL 116 }; 117 118 enum { 119 KVM_RUN_DEFAULT, 120 KVM_RUN_SANDBOX, 121 }; 122 123 void kvm_run_set_wrapper_sandbox(void) 124 { 125 kvm_run_wrapper = KVM_RUN_SANDBOX; 126 } 127 128 static int img_name_parser(const struct option *opt, const char *arg, int unset) 129 { 130 char *sep; 131 struct stat st; 132 char path[PATH_MAX]; 133 134 if (stat(arg, &st) == 0 && 135 S_ISDIR(st.st_mode)) { 136 char tmp[PATH_MAX]; 137 138 if (using_rootfs) 139 die("Please use only one rootfs directory atmost"); 140 141 if (realpath(arg, tmp) == 0 || 142 virtio_9p__register(kvm, tmp, "/dev/root") < 0) 143 die("Unable to initialize virtio 9p"); 144 using_rootfs = 1; 145 return 0; 146 } 147 148 snprintf(path, PATH_MAX, "%s%s", kvm__get_dir(), arg); 149 150 if (stat(path, &st) == 0 && 151 S_ISDIR(st.st_mode)) { 152 char tmp[PATH_MAX]; 153 154 if (using_rootfs) 155 die("Please use only one rootfs directory atmost"); 156 157 if (realpath(path, tmp) == 0 || 158 virtio_9p__register(kvm, tmp, "/dev/root") < 0) 159 die("Unable to initialize virtio 9p"); 160 if (virtio_9p__register(kvm, "/", "hostfs") < 0) 161 die("Unable to initialize virtio 9p"); 162 kvm_setup_resolv(arg); 163 using_rootfs = custom_rootfs = 1; 164 custom_rootfs_name = arg; 165 return 0; 166 } 167 168 if (image_count >= MAX_DISK_IMAGES) 169 die("Currently only 4 images are supported"); 170 171 image_filename[image_count] = arg; 172 sep = strstr(arg, ","); 173 if (sep) { 174 if (strcmp(sep + 1, "ro") == 0) 175 readonly_image[image_count] = 1; 176 *sep = 0; 177 } 178 179 image_count++; 180 181 return 0; 182 } 183 184 static int virtio_9p_rootdir_parser(const struct option *opt, const char *arg, int unset) 185 { 186 char *tag_name; 187 char tmp[PATH_MAX]; 188 189 /* 190 * 9p dir can be of the form dirname,tag_name or 191 * just dirname. In the later case we use the 192 * default tag name 193 */ 194 tag_name = strstr(arg, ","); 195 if (tag_name) { 196 *tag_name = '\0'; 197 tag_name++; 198 } 199 if (realpath(arg, tmp)) { 200 if (virtio_9p__register(kvm, tmp, tag_name) < 0) 201 die("Unable to initialize virtio 9p"); 202 } else 203 die("Failed resolving 9p path"); 204 return 0; 205 } 206 207 static int tty_parser(const struct option *opt, const char *arg, int unset) 208 { 209 int tty = atoi(arg); 210 211 term_set_tty(tty); 212 213 return 0; 214 } 215 216 static inline void str_to_mac(const char *str, char *mac) 217 { 218 sscanf(str, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", 219 mac, mac+1, mac+2, mac+3, mac+4, mac+5); 220 } 221 static int set_net_param(struct virtio_net_params *p, const char *param, 222 const char *val) 223 { 224 if (strcmp(param, "guest_mac") == 0) { 225 str_to_mac(val, p->guest_mac); 226 } else if (strcmp(param, "mode") == 0) { 227 if (!strncmp(val, "user", 4)) { 228 int i; 229 230 for (i = 0; i < num_net_devices; i++) 231 if (net_params[i].mode == NET_MODE_USER) 232 die("Only one usermode network device allowed at a time"); 233 p->mode = NET_MODE_USER; 234 } else if (!strncmp(val, "tap", 3)) { 235 p->mode = NET_MODE_TAP; 236 } else if (!strncmp(val, "none", 4)) { 237 no_net = 1; 238 return -1; 239 } else 240 die("Unkown network mode %s, please use user, tap or none", network); 241 } else if (strcmp(param, "script") == 0) { 242 p->script = strdup(val); 243 } else if (strcmp(param, "guest_ip") == 0) { 244 p->guest_ip = strdup(val); 245 } else if (strcmp(param, "host_ip") == 0) { 246 p->host_ip = strdup(val); 247 } else if (strcmp(param, "trans") == 0) { 248 p->trans = strdup(val); 249 } else if (strcmp(param, "vhost") == 0) { 250 p->vhost = atoi(val); 251 } else if (strcmp(param, "fd") == 0) { 252 p->fd = atoi(val); 253 } 254 255 return 0; 256 } 257 258 static int netdev_parser(const struct option *opt, const char *arg, int unset) 259 { 260 struct virtio_net_params p; 261 char *buf = NULL, *cmd = NULL, *cur = NULL; 262 bool on_cmd = true; 263 264 if (arg) { 265 buf = strdup(arg); 266 if (buf == NULL) 267 die("Failed allocating new net buffer"); 268 cur = strtok(buf, ",="); 269 } 270 271 p = (struct virtio_net_params) { 272 .guest_ip = DEFAULT_GUEST_ADDR, 273 .host_ip = DEFAULT_HOST_ADDR, 274 .script = DEFAULT_SCRIPT, 275 .mode = NET_MODE_TAP, 276 }; 277 278 str_to_mac(DEFAULT_GUEST_MAC, p.guest_mac); 279 p.guest_mac[5] += num_net_devices; 280 281 while (cur) { 282 if (on_cmd) { 283 cmd = cur; 284 } else { 285 if (set_net_param(&p, cmd, cur) < 0) 286 goto done; 287 } 288 on_cmd = !on_cmd; 289 290 cur = strtok(NULL, ",="); 291 }; 292 293 num_net_devices++; 294 295 net_params = realloc(net_params, num_net_devices * sizeof(*net_params)); 296 if (net_params == NULL) 297 die("Failed adding new network device"); 298 299 net_params[num_net_devices - 1] = p; 300 301 done: 302 free(buf); 303 return 0; 304 } 305 306 static int shmem_parser(const struct option *opt, const char *arg, int unset) 307 { 308 const u64 default_size = SHMEM_DEFAULT_SIZE; 309 const u64 default_phys_addr = SHMEM_DEFAULT_ADDR; 310 const char *default_handle = SHMEM_DEFAULT_HANDLE; 311 struct shmem_info *si = malloc(sizeof(struct shmem_info)); 312 u64 phys_addr; 313 u64 size; 314 char *handle = NULL; 315 int create = 0; 316 const char *p = arg; 317 char *next; 318 int base = 10; 319 int verbose = 0; 320 321 const int skip_pci = strlen("pci:"); 322 if (verbose) 323 pr_info("shmem_parser(%p,%s,%d)", opt, arg, unset); 324 /* parse out optional addr family */ 325 if (strcasestr(p, "pci:")) { 326 p += skip_pci; 327 } else if (strcasestr(p, "mem:")) { 328 die("I can't add to E820 map yet.\n"); 329 } 330 /* parse out physical addr */ 331 base = 10; 332 if (strcasestr(p, "0x")) 333 base = 16; 334 phys_addr = strtoll(p, &next, base); 335 if (next == p && phys_addr == 0) { 336 pr_info("shmem: no physical addr specified, using default."); 337 phys_addr = default_phys_addr; 338 } 339 if (*next != ':' && *next != '\0') 340 die("shmem: unexpected chars after phys addr.\n"); 341 if (*next == '\0') 342 p = next; 343 else 344 p = next + 1; 345 /* parse out size */ 346 base = 10; 347 if (strcasestr(p, "0x")) 348 base = 16; 349 size = strtoll(p, &next, base); 350 if (next == p && size == 0) { 351 pr_info("shmem: no size specified, using default."); 352 size = default_size; 353 } 354 /* look for [KMGkmg][Bb]* uses base 2. */ 355 int skip_B = 0; 356 if (strspn(next, "KMGkmg")) { /* might have a prefix */ 357 if (*(next + 1) == 'B' || *(next + 1) == 'b') 358 skip_B = 1; 359 switch (*next) { 360 case 'K': 361 case 'k': 362 size = size << KB_SHIFT; 363 break; 364 case 'M': 365 case 'm': 366 size = size << MB_SHIFT; 367 break; 368 case 'G': 369 case 'g': 370 size = size << GB_SHIFT; 371 break; 372 default: 373 die("shmem: bug in detecting size prefix."); 374 break; 375 } 376 next += 1 + skip_B; 377 } 378 if (*next != ':' && *next != '\0') { 379 die("shmem: unexpected chars after phys size. <%c><%c>\n", 380 *next, *p); 381 } 382 if (*next == '\0') 383 p = next; 384 else 385 p = next + 1; 386 /* parse out optional shmem handle */ 387 const int skip_handle = strlen("handle="); 388 next = strcasestr(p, "handle="); 389 if (*p && next) { 390 if (p != next) 391 die("unexpected chars before handle\n"); 392 p += skip_handle; 393 next = strchrnul(p, ':'); 394 if (next - p) { 395 handle = malloc(next - p + 1); 396 strncpy(handle, p, next - p); 397 handle[next - p] = '\0'; /* just in case. */ 398 } 399 if (*next == '\0') 400 p = next; 401 else 402 p = next + 1; 403 } 404 /* parse optional create flag to see if we should create shm seg. */ 405 if (*p && strcasestr(p, "create")) { 406 create = 1; 407 p += strlen("create"); 408 } 409 if (*p != '\0') 410 die("shmem: unexpected trailing chars\n"); 411 if (handle == NULL) { 412 handle = malloc(strlen(default_handle) + 1); 413 strcpy(handle, default_handle); 414 } 415 if (verbose) { 416 pr_info("shmem: phys_addr = %llx", phys_addr); 417 pr_info("shmem: size = %llx", size); 418 pr_info("shmem: handle = %s", handle); 419 pr_info("shmem: create = %d", create); 420 } 421 422 si->phys_addr = phys_addr; 423 si->size = size; 424 si->handle = handle; 425 si->create = create; 426 pci_shmem__register_mem(si); /* ownership of si, etc. passed on. */ 427 return 0; 428 } 429 430 static const struct option options[] = { 431 OPT_GROUP("Basic options:"), 432 OPT_STRING('\0', "name", &guest_name, "guest name", 433 "A name for the guest"), 434 OPT_INTEGER('c', "cpus", &nrcpus, "Number of CPUs"), 435 OPT_U64('m', "mem", &ram_size, "Virtual machine memory size in MiB."), 436 OPT_CALLBACK('\0', "shmem", NULL, 437 "[pci:]<addr>:<size>[:handle=<handle>][:create]", 438 "Share host shmem with guest via pci device", 439 shmem_parser), 440 OPT_CALLBACK('d', "disk", NULL, "image or rootfs_dir", "Disk image or rootfs directory", img_name_parser), 441 OPT_BOOLEAN('\0', "balloon", &balloon, "Enable virtio balloon"), 442 OPT_BOOLEAN('\0', "vnc", &vnc, "Enable VNC framebuffer"), 443 OPT_BOOLEAN('\0', "sdl", &sdl, "Enable SDL framebuffer"), 444 OPT_BOOLEAN('\0', "rng", &virtio_rng, "Enable virtio Random Number Generator"), 445 OPT_CALLBACK('\0', "9p", NULL, "dir_to_share,tag_name", 446 "Enable virtio 9p to share files between host and guest", virtio_9p_rootdir_parser), 447 OPT_STRING('\0', "console", &console, "serial, virtio or hv", 448 "Console to use"), 449 OPT_STRING('\0', "dev", &dev, "device_file", "KVM device file"), 450 OPT_CALLBACK('\0', "tty", NULL, "tty id", 451 "Remap guest TTY into a pty on the host", 452 tty_parser), 453 OPT_STRING('\0', "sandbox", &sandbox, "script", 454 "Run this script when booting into custom rootfs"), 455 OPT_STRING('\0', "hugetlbfs", &hugetlbfs_path, "path", "Hugetlbfs path"), 456 457 OPT_GROUP("Kernel options:"), 458 OPT_STRING('k', "kernel", &kernel_filename, "kernel", 459 "Kernel to boot in virtual machine"), 460 OPT_STRING('i', "initrd", &initrd_filename, "initrd", 461 "Initial RAM disk image"), 462 OPT_STRING('p', "params", &kernel_cmdline, "params", 463 "Kernel command line arguments"), 464 OPT_STRING('f', "firmware", &firmware_filename, "firmware", 465 "Firmware image to boot in virtual machine"), 466 467 OPT_GROUP("Networking options:"), 468 OPT_CALLBACK_DEFAULT('n', "network", NULL, "network params", 469 "Create a new guest NIC", 470 netdev_parser, NULL), 471 OPT_BOOLEAN('\0', "no-dhcp", &no_dhcp, "Disable kernel DHCP in rootfs mode"), 472 473 OPT_GROUP("BIOS options:"), 474 OPT_INTEGER('\0', "vidmode", &vidmode, 475 "Video mode"), 476 477 OPT_GROUP("Debug options:"), 478 OPT_BOOLEAN('\0', "debug", &do_debug_print, 479 "Enable debug messages"), 480 OPT_BOOLEAN('\0', "debug-single-step", &single_step, 481 "Enable single stepping"), 482 OPT_BOOLEAN('\0', "debug-ioport", &ioport_debug, 483 "Enable ioport debugging"), 484 OPT_INTEGER('\0', "debug-iodelay", &debug_iodelay, 485 "Delay IO by millisecond"), 486 OPT_END() 487 }; 488 489 /* 490 * Serialize debug printout so that the output of multiple vcpus does not 491 * get mixed up: 492 */ 493 static int printout_done; 494 495 static void handle_sigusr1(int sig) 496 { 497 struct kvm_cpu *cpu = current_kvm_cpu; 498 int fd = kvm_cpu__get_debug_fd(); 499 500 if (!cpu || cpu->needs_nmi) 501 return; 502 503 dprintf(fd, "\n #\n # vCPU #%ld's dump:\n #\n", cpu->cpu_id); 504 kvm_cpu__show_registers(cpu); 505 kvm_cpu__show_code(cpu); 506 kvm_cpu__show_page_tables(cpu); 507 fflush(stdout); 508 printout_done = 1; 509 mb(); 510 } 511 512 /* Pause/resume the guest using SIGUSR2 */ 513 static int is_paused; 514 515 static void handle_pause(int fd, u32 type, u32 len, u8 *msg) 516 { 517 if (WARN_ON(len)) 518 return; 519 520 if (type == KVM_IPC_RESUME && is_paused) { 521 kvm->vm_state = KVM_VMSTATE_RUNNING; 522 kvm__continue(); 523 } else if (type == KVM_IPC_PAUSE && !is_paused) { 524 kvm->vm_state = KVM_VMSTATE_PAUSED; 525 kvm__pause(); 526 } else { 527 return; 528 } 529 530 is_paused = !is_paused; 531 } 532 533 static void handle_vmstate(int fd, u32 type, u32 len, u8 *msg) 534 { 535 int r = 0; 536 537 if (type == KVM_IPC_VMSTATE) 538 r = write(fd, &kvm->vm_state, sizeof(kvm->vm_state)); 539 540 if (r < 0) 541 pr_warning("Failed sending VMSTATE"); 542 } 543 544 static void handle_debug(int fd, u32 type, u32 len, u8 *msg) 545 { 546 int i; 547 struct debug_cmd_params *params; 548 u32 dbg_type; 549 u32 vcpu; 550 551 if (WARN_ON(type != KVM_IPC_DEBUG || len != sizeof(*params))) 552 return; 553 554 params = (void *)msg; 555 dbg_type = params->dbg_type; 556 vcpu = params->cpu; 557 558 if (dbg_type & KVM_DEBUG_CMD_TYPE_NMI) { 559 if ((int)vcpu >= kvm->nrcpus) 560 return; 561 562 kvm_cpus[vcpu]->needs_nmi = 1; 563 pthread_kill(kvm_cpus[vcpu]->thread, SIGUSR1); 564 } 565 566 if (!(dbg_type & KVM_DEBUG_CMD_TYPE_DUMP)) 567 return; 568 569 for (i = 0; i < nrcpus; i++) { 570 struct kvm_cpu *cpu = kvm_cpus[i]; 571 572 if (!cpu) 573 continue; 574 575 printout_done = 0; 576 577 kvm_cpu__set_debug_fd(fd); 578 pthread_kill(cpu->thread, SIGUSR1); 579 /* 580 * Wait for the vCPU to dump state before signalling 581 * the next thread. Since this is debug code it does 582 * not matter that we are burning CPU time a bit: 583 */ 584 while (!printout_done) 585 mb(); 586 } 587 588 close(fd); 589 590 serial8250__inject_sysrq(kvm); 591 } 592 593 static void handle_sigalrm(int sig) 594 { 595 kvm__arch_periodic_poll(kvm); 596 } 597 598 static void handle_stop(int fd, u32 type, u32 len, u8 *msg) 599 { 600 if (WARN_ON(type != KVM_IPC_STOP || len)) 601 return; 602 603 kvm_cpu__reboot(); 604 } 605 606 static void *kvm_cpu_thread(void *arg) 607 { 608 current_kvm_cpu = arg; 609 610 if (kvm_cpu__start(current_kvm_cpu)) 611 goto panic_kvm; 612 613 return (void *) (intptr_t) 0; 614 615 panic_kvm: 616 fprintf(stderr, "KVM exit reason: %u (\"%s\")\n", 617 current_kvm_cpu->kvm_run->exit_reason, 618 kvm_exit_reasons[current_kvm_cpu->kvm_run->exit_reason]); 619 if (current_kvm_cpu->kvm_run->exit_reason == KVM_EXIT_UNKNOWN) 620 fprintf(stderr, "KVM exit code: 0x%Lu\n", 621 current_kvm_cpu->kvm_run->hw.hardware_exit_reason); 622 623 kvm_cpu__set_debug_fd(STDOUT_FILENO); 624 kvm_cpu__show_registers(current_kvm_cpu); 625 kvm_cpu__show_code(current_kvm_cpu); 626 kvm_cpu__show_page_tables(current_kvm_cpu); 627 628 return (void *) (intptr_t) 1; 629 } 630 631 static char kernel[PATH_MAX]; 632 633 static const char *host_kernels[] = { 634 "/boot/vmlinuz", 635 "/boot/bzImage", 636 NULL 637 }; 638 639 static const char *default_kernels[] = { 640 "./bzImage", 641 "arch/" BUILD_ARCH "/boot/bzImage", 642 "../../arch/" BUILD_ARCH "/boot/bzImage", 643 NULL 644 }; 645 646 static const char *default_vmlinux[] = { 647 "vmlinux", 648 "../../../vmlinux", 649 "../../vmlinux", 650 NULL 651 }; 652 653 static void kernel_usage_with_options(void) 654 { 655 const char **k; 656 struct utsname uts; 657 658 fprintf(stderr, "Fatal: could not find default kernel image in:\n"); 659 k = &default_kernels[0]; 660 while (*k) { 661 fprintf(stderr, "\t%s\n", *k); 662 k++; 663 } 664 665 if (uname(&uts) < 0) 666 return; 667 668 k = &host_kernels[0]; 669 while (*k) { 670 if (snprintf(kernel, PATH_MAX, "%s-%s", *k, uts.release) < 0) 671 return; 672 fprintf(stderr, "\t%s\n", kernel); 673 k++; 674 } 675 fprintf(stderr, "\nPlease see '%s run --help' for more options.\n\n", 676 KVM_BINARY_NAME); 677 } 678 679 static u64 host_ram_size(void) 680 { 681 long page_size; 682 long nr_pages; 683 684 nr_pages = sysconf(_SC_PHYS_PAGES); 685 if (nr_pages < 0) { 686 pr_warning("sysconf(_SC_PHYS_PAGES) failed"); 687 return 0; 688 } 689 690 page_size = sysconf(_SC_PAGE_SIZE); 691 if (page_size < 0) { 692 pr_warning("sysconf(_SC_PAGE_SIZE) failed"); 693 return 0; 694 } 695 696 return (nr_pages * page_size) >> MB_SHIFT; 697 } 698 699 /* 700 * If user didn't specify how much memory it wants to allocate for the guest, 701 * avoid filling the whole host RAM. 702 */ 703 #define RAM_SIZE_RATIO 0.8 704 705 static u64 get_ram_size(int nr_cpus) 706 { 707 u64 available; 708 u64 ram_size; 709 710 ram_size = 64 * (nr_cpus + 3); 711 712 available = host_ram_size() * RAM_SIZE_RATIO; 713 if (!available) 714 available = MIN_RAM_SIZE_MB; 715 716 if (ram_size > available) 717 ram_size = available; 718 719 return ram_size; 720 } 721 722 static const char *find_kernel(void) 723 { 724 const char **k; 725 struct stat st; 726 struct utsname uts; 727 728 k = &default_kernels[0]; 729 while (*k) { 730 if (stat(*k, &st) < 0 || !S_ISREG(st.st_mode)) { 731 k++; 732 continue; 733 } 734 strncpy(kernel, *k, PATH_MAX); 735 return kernel; 736 } 737 738 if (uname(&uts) < 0) 739 return NULL; 740 741 k = &host_kernels[0]; 742 while (*k) { 743 if (snprintf(kernel, PATH_MAX, "%s-%s", *k, uts.release) < 0) 744 return NULL; 745 746 if (stat(kernel, &st) < 0 || !S_ISREG(st.st_mode)) { 747 k++; 748 continue; 749 } 750 return kernel; 751 752 } 753 return NULL; 754 } 755 756 static const char *find_vmlinux(void) 757 { 758 const char **vmlinux; 759 760 vmlinux = &default_vmlinux[0]; 761 while (*vmlinux) { 762 struct stat st; 763 764 if (stat(*vmlinux, &st) < 0 || !S_ISREG(st.st_mode)) { 765 vmlinux++; 766 continue; 767 } 768 return *vmlinux; 769 } 770 return NULL; 771 } 772 773 void kvm_run_help(void) 774 { 775 usage_with_options(run_usage, options); 776 } 777 778 static int kvm_custom_stage2(void) 779 { 780 char tmp[PATH_MAX], dst[PATH_MAX], *src; 781 const char *rootfs = custom_rootfs_name; 782 int r; 783 784 src = realpath("guest/init_stage2", NULL); 785 if (src == NULL) 786 return -ENOMEM; 787 788 snprintf(tmp, PATH_MAX, "%s%s/virt/init_stage2", kvm__get_dir(), rootfs); 789 remove(tmp); 790 791 snprintf(dst, PATH_MAX, "/host/%s", src); 792 r = symlink(dst, tmp); 793 free(src); 794 795 return r; 796 } 797 798 static int kvm_run_set_sandbox(void) 799 { 800 const char *guestfs_name = custom_rootfs_name; 801 char path[PATH_MAX], script[PATH_MAX], *tmp; 802 803 snprintf(path, PATH_MAX, "%s%s/virt/sandbox.sh", kvm__get_dir(), guestfs_name); 804 805 remove(path); 806 807 if (sandbox == NULL) 808 return 0; 809 810 tmp = realpath(sandbox, NULL); 811 if (tmp == NULL) 812 return -ENOMEM; 813 814 snprintf(script, PATH_MAX, "/host/%s", tmp); 815 free(tmp); 816 817 return symlink(script, path); 818 } 819 820 static void kvm_write_sandbox_cmd_exactly(int fd, const char *arg) 821 { 822 const char *single_quote; 823 824 if (!*arg) { /* zero length string */ 825 if (write(fd, "''", 2) <= 0) 826 die("Failed writing sandbox script"); 827 return; 828 } 829 830 while (*arg) { 831 single_quote = strchrnul(arg, '\''); 832 833 /* write non-single-quote string as #('string') */ 834 if (arg != single_quote) { 835 if (write(fd, "'", 1) <= 0 || 836 write(fd, arg, single_quote - arg) <= 0 || 837 write(fd, "'", 1) <= 0) 838 die("Failed writing sandbox script"); 839 } 840 841 /* write single quote as #("'") */ 842 if (*single_quote) { 843 if (write(fd, "\"'\"", 3) <= 0) 844 die("Failed writing sandbox script"); 845 } else 846 break; 847 848 arg = single_quote + 1; 849 } 850 } 851 852 static void resolve_program(const char *src, char *dst, size_t len) 853 { 854 struct stat st; 855 int err; 856 857 err = stat(src, &st); 858 859 if (!err && S_ISREG(st.st_mode)) { 860 char resolved_path[PATH_MAX]; 861 862 if (!realpath(src, resolved_path)) 863 die("Unable to resolve program %s: %s\n", src, strerror(errno)); 864 865 snprintf(dst, len, "/host%s", resolved_path); 866 } else 867 strncpy(dst, src, len); 868 } 869 870 static void kvm_run_write_sandbox_cmd(const char **argv, int argc) 871 { 872 const char script_hdr[] = "#! /bin/bash\n\n"; 873 char program[PATH_MAX]; 874 int fd; 875 876 remove(sandbox); 877 878 fd = open(sandbox, O_RDWR | O_CREAT, 0777); 879 if (fd < 0) 880 die("Failed creating sandbox script"); 881 882 if (write(fd, script_hdr, sizeof(script_hdr) - 1) <= 0) 883 die("Failed writing sandbox script"); 884 885 resolve_program(argv[0], program, PATH_MAX); 886 kvm_write_sandbox_cmd_exactly(fd, program); 887 888 argv++; 889 argc--; 890 891 while (argc) { 892 if (write(fd, " ", 1) <= 0) 893 die("Failed writing sandbox script"); 894 895 kvm_write_sandbox_cmd_exactly(fd, argv[0]); 896 argv++; 897 argc--; 898 } 899 if (write(fd, "\n", 1) <= 0) 900 die("Failed writing sandbox script"); 901 902 close(fd); 903 } 904 905 static int kvm_cmd_run_init(int argc, const char **argv) 906 { 907 static char real_cmdline[2048], default_name[20]; 908 struct framebuffer *fb = NULL; 909 unsigned int nr_online_cpus; 910 int max_cpus, recommended_cpus; 911 int i, r; 912 913 signal(SIGALRM, handle_sigalrm); 914 kvm_ipc__register_handler(KVM_IPC_DEBUG, handle_debug); 915 signal(SIGUSR1, handle_sigusr1); 916 kvm_ipc__register_handler(KVM_IPC_PAUSE, handle_pause); 917 kvm_ipc__register_handler(KVM_IPC_RESUME, handle_pause); 918 kvm_ipc__register_handler(KVM_IPC_STOP, handle_stop); 919 kvm_ipc__register_handler(KVM_IPC_VMSTATE, handle_vmstate); 920 921 nr_online_cpus = sysconf(_SC_NPROCESSORS_ONLN); 922 923 while (argc != 0) { 924 argc = parse_options(argc, argv, options, run_usage, 925 PARSE_OPT_STOP_AT_NON_OPTION | 926 PARSE_OPT_KEEP_DASHDASH); 927 if (argc != 0) { 928 /* Cusrom options, should have been handled elsewhere */ 929 if (strcmp(argv[0], "--") == 0) { 930 if (kvm_run_wrapper == KVM_RUN_SANDBOX) { 931 sandbox = DEFAULT_SANDBOX_FILENAME; 932 kvm_run_write_sandbox_cmd(argv+1, argc-1); 933 break; 934 } 935 } 936 937 if ((kvm_run_wrapper == KVM_RUN_DEFAULT && kernel_filename) || 938 (kvm_run_wrapper == KVM_RUN_SANDBOX && sandbox)) { 939 fprintf(stderr, "Cannot handle parameter: " 940 "%s\n", argv[0]); 941 usage_with_options(run_usage, options); 942 return EINVAL; 943 } 944 if (kvm_run_wrapper == KVM_RUN_SANDBOX) { 945 /* 946 * first unhandled parameter is treated as 947 * sandbox command 948 */ 949 sandbox = DEFAULT_SANDBOX_FILENAME; 950 kvm_run_write_sandbox_cmd(argv, argc); 951 } else { 952 /* 953 * first unhandled parameter is treated as a kernel 954 * image 955 */ 956 kernel_filename = argv[0]; 957 } 958 argv++; 959 argc--; 960 } 961 962 } 963 964 if (!kernel_filename) 965 kernel_filename = find_kernel(); 966 967 if (!kernel_filename) { 968 kernel_usage_with_options(); 969 return EINVAL; 970 } 971 972 vmlinux_filename = find_vmlinux(); 973 974 if (nrcpus == 0) 975 nrcpus = nr_online_cpus; 976 977 if (!ram_size) 978 ram_size = get_ram_size(nrcpus); 979 980 if (ram_size < MIN_RAM_SIZE_MB) 981 die("Not enough memory specified: %lluMB (min %lluMB)", ram_size, MIN_RAM_SIZE_MB); 982 983 if (ram_size > host_ram_size()) 984 pr_warning("Guest memory size %lluMB exceeds host physical RAM size %lluMB", ram_size, host_ram_size()); 985 986 ram_size <<= MB_SHIFT; 987 988 if (!dev) 989 dev = DEFAULT_KVM_DEV; 990 991 if (!console) 992 console = DEFAULT_CONSOLE; 993 994 if (!strncmp(console, "virtio", 6)) 995 active_console = CONSOLE_VIRTIO; 996 else if (!strncmp(console, "serial", 6)) 997 active_console = CONSOLE_8250; 998 else if (!strncmp(console, "hv", 2)) 999 active_console = CONSOLE_HV; 1000 else 1001 pr_warning("No console!"); 1002 1003 if (!host_ip) 1004 host_ip = DEFAULT_HOST_ADDR; 1005 1006 if (!guest_ip) 1007 guest_ip = DEFAULT_GUEST_ADDR; 1008 1009 if (!guest_mac) 1010 guest_mac = DEFAULT_GUEST_MAC; 1011 1012 if (!host_mac) 1013 host_mac = DEFAULT_HOST_MAC; 1014 1015 if (!script) 1016 script = DEFAULT_SCRIPT; 1017 1018 term_init(); 1019 1020 if (!guest_name) { 1021 if (custom_rootfs) { 1022 guest_name = custom_rootfs_name; 1023 } else { 1024 sprintf(default_name, "guest-%u", getpid()); 1025 guest_name = default_name; 1026 } 1027 } 1028 1029 kvm = kvm__init(dev, hugetlbfs_path, ram_size, guest_name); 1030 if (IS_ERR(kvm)) { 1031 r = PTR_ERR(kvm); 1032 goto fail; 1033 } 1034 1035 kvm->single_step = single_step; 1036 1037 r = ioeventfd__init(kvm); 1038 if (r < 0) { 1039 pr_err("ioeventfd__init() failed with error %d\n", r); 1040 goto fail; 1041 } 1042 1043 max_cpus = kvm__max_cpus(kvm); 1044 recommended_cpus = kvm__recommended_cpus(kvm); 1045 1046 if (nrcpus > max_cpus) { 1047 printf(" # Limit the number of CPUs to %d\n", max_cpus); 1048 nrcpus = max_cpus; 1049 } else if (nrcpus > recommended_cpus) { 1050 printf(" # Warning: The maximum recommended amount of VCPUs" 1051 " is %d\n", recommended_cpus); 1052 } 1053 1054 kvm->nrcpus = nrcpus; 1055 1056 /* Alloc one pointer too many, so array ends up 0-terminated */ 1057 kvm_cpus = calloc(nrcpus + 1, sizeof(void *)); 1058 if (!kvm_cpus) 1059 die("Couldn't allocate array for %d CPUs", nrcpus); 1060 1061 r = irq__init(kvm); 1062 if (r < 0) { 1063 pr_err("irq__init() failed with error %d\n", r); 1064 goto fail; 1065 } 1066 1067 r = pci__init(kvm); 1068 if (r < 0) { 1069 pr_err("pci__init() failed with error %d\n", r); 1070 goto fail; 1071 } 1072 1073 r = ioport__init(kvm); 1074 if (r < 0) { 1075 pr_err("ioport__init() failed with error %d\n", r); 1076 goto fail; 1077 } 1078 1079 /* 1080 * vidmode should be either specified 1081 * either set by default 1082 */ 1083 if (vnc || sdl) { 1084 if (vidmode == -1) 1085 vidmode = 0x312; 1086 } else { 1087 vidmode = 0; 1088 } 1089 1090 memset(real_cmdline, 0, sizeof(real_cmdline)); 1091 kvm__arch_set_cmdline(real_cmdline, vnc || sdl); 1092 1093 if (strlen(real_cmdline) > 0) 1094 strcat(real_cmdline, " "); 1095 1096 if (kernel_cmdline) 1097 strlcat(real_cmdline, kernel_cmdline, sizeof(real_cmdline)); 1098 1099 if (!using_rootfs && !image_filename[0] && !initrd_filename) { 1100 char tmp[PATH_MAX]; 1101 1102 kvm_setup_create_new(custom_rootfs_name); 1103 kvm_setup_resolv(custom_rootfs_name); 1104 1105 snprintf(tmp, PATH_MAX, "%s%s", kvm__get_dir(), "default"); 1106 if (virtio_9p__register(kvm, tmp, "/dev/root") < 0) 1107 die("Unable to initialize virtio 9p"); 1108 if (virtio_9p__register(kvm, "/", "hostfs") < 0) 1109 die("Unable to initialize virtio 9p"); 1110 using_rootfs = custom_rootfs = 1; 1111 } 1112 1113 if (using_rootfs) { 1114 strcat(real_cmdline, " root=/dev/root rw rootflags=rw,trans=virtio,version=9p2000.L rootfstype=9p"); 1115 if (custom_rootfs) { 1116 kvm_run_set_sandbox(); 1117 1118 strcat(real_cmdline, " init=/virt/init"); 1119 1120 if (!no_dhcp) 1121 strcat(real_cmdline, " ip=dhcp"); 1122 if (kvm_custom_stage2()) 1123 die("Failed linking stage 2 of init."); 1124 } 1125 } else if (!strstr(real_cmdline, "root=")) { 1126 strlcat(real_cmdline, " root=/dev/vda rw ", sizeof(real_cmdline)); 1127 } 1128 1129 if (image_count) { 1130 kvm->nr_disks = image_count; 1131 kvm->disks = disk_image__open_all(image_filename, readonly_image, image_count); 1132 if (IS_ERR(kvm->disks)) { 1133 r = PTR_ERR(kvm->disks); 1134 pr_err("disk_image__open_all() failed with error %ld\n", 1135 PTR_ERR(kvm->disks)); 1136 goto fail; 1137 } 1138 } 1139 1140 printf(" # %s run -k %s -m %Lu -c %d --name %s\n", KVM_BINARY_NAME, 1141 kernel_filename, ram_size / 1024 / 1024, nrcpus, guest_name); 1142 1143 if (!firmware_filename) { 1144 if (!kvm__load_kernel(kvm, kernel_filename, 1145 initrd_filename, real_cmdline, vidmode)) 1146 die("unable to load kernel %s", kernel_filename); 1147 1148 kvm->vmlinux = vmlinux_filename; 1149 r = symbol_init(kvm); 1150 if (r < 0) 1151 pr_debug("symbol_init() failed with error %d\n", r); 1152 } 1153 1154 ioport__setup_arch(); 1155 1156 r = rtc__init(kvm); 1157 if (r < 0) { 1158 pr_err("rtc__init() failed with error %d\n", r); 1159 goto fail; 1160 } 1161 1162 r = serial8250__init(kvm); 1163 if (r < 0) { 1164 pr_err("serial__init() failed with error %d\n", r); 1165 goto fail; 1166 } 1167 1168 r = virtio_blk__init(kvm); 1169 if (r < 0) { 1170 pr_err("virtio_blk__init() failed with error %d\n", r); 1171 goto fail; 1172 } 1173 1174 if (active_console == CONSOLE_VIRTIO) 1175 virtio_console__init(kvm); 1176 1177 if (virtio_rng) 1178 virtio_rng__init(kvm); 1179 1180 if (balloon) 1181 virtio_bln__init(kvm); 1182 1183 if (!network) 1184 network = DEFAULT_NETWORK; 1185 1186 virtio_9p__init(kvm); 1187 1188 for (i = 0; i < num_net_devices; i++) { 1189 net_params[i].kvm = kvm; 1190 virtio_net__init(&net_params[i]); 1191 } 1192 1193 if (num_net_devices == 0 && no_net == 0) { 1194 struct virtio_net_params net_params; 1195 1196 net_params = (struct virtio_net_params) { 1197 .guest_ip = guest_ip, 1198 .host_ip = host_ip, 1199 .kvm = kvm, 1200 .script = script, 1201 .mode = NET_MODE_USER, 1202 }; 1203 str_to_mac(guest_mac, net_params.guest_mac); 1204 str_to_mac(host_mac, net_params.host_mac); 1205 1206 virtio_net__init(&net_params); 1207 } 1208 1209 kvm__init_ram(kvm); 1210 1211 #ifdef CONFIG_X86 1212 kbd__init(kvm); 1213 #endif 1214 1215 pci_shmem__init(kvm); 1216 1217 if (vnc || sdl) { 1218 fb = vesa__init(kvm); 1219 if (IS_ERR(fb)) { 1220 pr_err("vesa__init() failed with error %ld\n", PTR_ERR(fb)); 1221 goto fail; 1222 } 1223 } 1224 1225 if (vnc && fb) { 1226 r = vnc__init(fb); 1227 if (r < 0) { 1228 pr_err("vnc__init() failed with error %d\n", r); 1229 goto fail; 1230 } 1231 } 1232 1233 if (sdl && fb) { 1234 sdl__init(fb); 1235 if (r < 0) { 1236 pr_err("sdl__init() failed with error %d\n", r); 1237 goto fail; 1238 } 1239 } 1240 1241 r = fb__start(); 1242 if (r < 0) { 1243 pr_err("fb__init() failed with error %d\n", r); 1244 goto fail; 1245 } 1246 1247 /* Device init all done; firmware init must 1248 * come after this (it may set up device trees etc.) 1249 */ 1250 1251 kvm__start_timer(kvm); 1252 1253 if (firmware_filename) { 1254 if (!kvm__load_firmware(kvm, firmware_filename)) 1255 die("unable to load firmware image %s: %s", firmware_filename, strerror(errno)); 1256 } else { 1257 kvm__arch_setup_firmware(kvm); 1258 if (r < 0) { 1259 pr_err("kvm__arch_setup_firmware() failed with error %d\n", r); 1260 goto fail; 1261 } 1262 } 1263 1264 for (i = 0; i < nrcpus; i++) { 1265 kvm_cpus[i] = kvm_cpu__init(kvm, i); 1266 if (!kvm_cpus[i]) 1267 die("unable to initialize KVM VCPU"); 1268 } 1269 1270 thread_pool__init(nr_online_cpus); 1271 fail: 1272 return r; 1273 } 1274 1275 static int kvm_cmd_run_work(void) 1276 { 1277 int i, r = -1; 1278 void *ret = NULL; 1279 1280 for (i = 0; i < nrcpus; i++) { 1281 if (pthread_create(&kvm_cpus[i]->thread, NULL, kvm_cpu_thread, kvm_cpus[i]) != 0) 1282 die("unable to create KVM VCPU thread"); 1283 } 1284 1285 /* Only VCPU #0 is going to exit by itself when shutting down */ 1286 if (pthread_join(kvm_cpus[0]->thread, &ret) != 0) 1287 r = 0; 1288 1289 kvm_cpu__delete(kvm_cpus[0]); 1290 kvm_cpus[0] = NULL; 1291 1292 for (i = 1; i < nrcpus; i++) { 1293 if (kvm_cpus[i]->is_running) { 1294 pthread_kill(kvm_cpus[i]->thread, SIGKVMEXIT); 1295 if (pthread_join(kvm_cpus[i]->thread, &ret) != 0) 1296 die("pthread_join"); 1297 kvm_cpu__delete(kvm_cpus[i]); 1298 } 1299 if (ret == NULL) 1300 r = 0; 1301 } 1302 1303 return r; 1304 } 1305 1306 static void kvm_cmd_run_exit(int guest_ret) 1307 { 1308 int r = 0; 1309 1310 compat__print_all_messages(); 1311 1312 r = symbol_exit(kvm); 1313 if (r < 0) 1314 pr_warning("symbol_exit() failed with error %d\n", r); 1315 1316 r = irq__exit(kvm); 1317 if (r < 0) 1318 pr_warning("irq__exit() failed with error %d\n", r); 1319 1320 fb__stop(); 1321 1322 r = virtio_blk__exit(kvm); 1323 if (r < 0) 1324 pr_warning("virtio_blk__exit() failed with error %d\n", r); 1325 1326 r = virtio_rng__exit(kvm); 1327 if (r < 0) 1328 pr_warning("virtio_rng__exit() failed with error %d\n", r); 1329 1330 r = disk_image__close_all(kvm->disks, image_count); 1331 if (r < 0) 1332 pr_warning("disk_image__close_all() failed with error %d\n", r); 1333 1334 r = serial8250__exit(kvm); 1335 if (r < 0) 1336 pr_warning("serial8250__exit() failed with error %d\n", r); 1337 1338 r = rtc__exit(kvm); 1339 if (r < 0) 1340 pr_warning("rtc__exit() failed with error %d\n", r); 1341 1342 r = kvm__arch_free_firmware(kvm); 1343 if (r < 0) 1344 pr_warning("kvm__arch_free_firmware() failed with error %d\n", r); 1345 1346 r = ioport__exit(kvm); 1347 if (r < 0) 1348 pr_warning("ioport__exit() failed with error %d\n", r); 1349 1350 r = ioeventfd__exit(kvm); 1351 if (r < 0) 1352 pr_warning("ioeventfd__exit() failed with error %d\n", r); 1353 1354 r = pci__exit(kvm); 1355 if (r < 0) 1356 pr_warning("pci__exit() failed with error %d\n", r); 1357 1358 r = kvm__exit(kvm); 1359 if (r < 0) 1360 pr_warning("pci__exit() failed with error %d\n", r); 1361 1362 free(kvm_cpus); 1363 1364 if (guest_ret == 0) 1365 printf("\n # KVM session ended normally.\n"); 1366 } 1367 1368 int kvm_cmd_run(int argc, const char **argv, const char *prefix) 1369 { 1370 int r, ret = -EFAULT; 1371 1372 r = kvm_cmd_run_init(argc, argv); 1373 if (r < 0) 1374 return r; 1375 1376 ret = kvm_cmd_run_work(); 1377 kvm_cmd_run_exit(ret); 1378 1379 return ret; 1380 } 1381