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 39 #include <sys/utsname.h> 40 #include <sys/types.h> 41 #include <sys/stat.h> 42 #include <termios.h> 43 #include <signal.h> 44 #include <stdlib.h> 45 #include <string.h> 46 #include <unistd.h> 47 #include <ctype.h> 48 #include <stdio.h> 49 50 #define DEFAULT_KVM_DEV "/dev/kvm" 51 #define DEFAULT_CONSOLE "serial" 52 #define DEFAULT_NETWORK "user" 53 #define DEFAULT_HOST_ADDR "192.168.33.1" 54 #define DEFAULT_GUEST_ADDR "192.168.33.15" 55 #define DEFAULT_GUEST_MAC "02:15:15:15:15:15" 56 #define DEFAULT_HOST_MAC "02:01:01:01:01:01" 57 #define DEFAULT_SCRIPT "none" 58 const char *DEFAULT_SANDBOX_FILENAME = "guest/sandbox.sh"; 59 60 #define MB_SHIFT (20) 61 #define KB_SHIFT (10) 62 #define GB_SHIFT (30) 63 #define MIN_RAM_SIZE_MB (64ULL) 64 #define MIN_RAM_SIZE_BYTE (MIN_RAM_SIZE_MB << MB_SHIFT) 65 66 struct kvm *kvm; 67 struct kvm_cpu *kvm_cpus[KVM_NR_CPUS]; 68 __thread struct kvm_cpu *current_kvm_cpu; 69 70 static u64 ram_size; 71 static u8 image_count; 72 static u8 num_net_devices; 73 static bool virtio_rng; 74 static const char *kernel_cmdline; 75 static const char *kernel_filename; 76 static const char *vmlinux_filename; 77 static const char *initrd_filename; 78 static const char *image_filename[MAX_DISK_IMAGES]; 79 static const char *console; 80 static const char *dev; 81 static const char *network; 82 static const char *host_ip; 83 static const char *guest_ip; 84 static const char *guest_mac; 85 static const char *host_mac; 86 static const char *script; 87 static const char *guest_name; 88 static const char *sandbox; 89 static struct virtio_net_params *net_params; 90 static bool single_step; 91 static bool readonly_image[MAX_DISK_IMAGES]; 92 static bool vnc; 93 static bool sdl; 94 static bool balloon; 95 static bool using_rootfs; 96 static bool custom_rootfs; 97 static bool no_net; 98 static bool no_dhcp; 99 extern bool ioport_debug; 100 static int kvm_run_wrapper; 101 extern int active_console; 102 extern int debug_iodelay; 103 104 bool do_debug_print = false; 105 106 static int nrcpus; 107 static int vidmode = -1; 108 109 static const char * const run_usage[] = { 110 "kvm run [<options>] [<kernel image>]", 111 NULL 112 }; 113 114 enum { 115 KVM_RUN_SANDBOX, 116 }; 117 118 void kvm_run_set_wrapper_sandbox(void) 119 { 120 kvm_run_wrapper = KVM_RUN_SANDBOX; 121 } 122 123 static int img_name_parser(const struct option *opt, const char *arg, int unset) 124 { 125 char *sep; 126 struct stat st; 127 char path[PATH_MAX]; 128 129 if (stat(arg, &st) == 0 && 130 S_ISDIR(st.st_mode)) { 131 char tmp[PATH_MAX]; 132 133 if (realpath(arg, tmp) == 0 || 134 virtio_9p__register(kvm, tmp, "/dev/root") < 0) 135 die("Unable to initialize virtio 9p"); 136 using_rootfs = 1; 137 return 0; 138 } 139 140 snprintf(path, PATH_MAX, "%s%s", kvm__get_dir(), arg); 141 142 if (stat(path, &st) == 0 && 143 S_ISDIR(st.st_mode)) { 144 char tmp[PATH_MAX]; 145 146 if (realpath(path, tmp) == 0 || 147 virtio_9p__register(kvm, tmp, "/dev/root") < 0) 148 die("Unable to initialize virtio 9p"); 149 if (virtio_9p__register(kvm, "/", "hostfs") < 0) 150 die("Unable to initialize virtio 9p"); 151 kvm_setup_resolv(arg); 152 using_rootfs = custom_rootfs = 1; 153 return 0; 154 } 155 156 if (image_count >= MAX_DISK_IMAGES) 157 die("Currently only 4 images are supported"); 158 159 image_filename[image_count] = arg; 160 sep = strstr(arg, ","); 161 if (sep) { 162 if (strcmp(sep + 1, "ro") == 0) 163 readonly_image[image_count] = 1; 164 *sep = 0; 165 } 166 167 image_count++; 168 169 return 0; 170 } 171 172 static int virtio_9p_rootdir_parser(const struct option *opt, const char *arg, int unset) 173 { 174 char *tag_name; 175 char tmp[PATH_MAX]; 176 177 /* 178 * 9p dir can be of the form dirname,tag_name or 179 * just dirname. In the later case we use the 180 * default tag name 181 */ 182 tag_name = strstr(arg, ","); 183 if (tag_name) { 184 *tag_name = '\0'; 185 tag_name++; 186 } 187 if (realpath(arg, tmp)) { 188 if (virtio_9p__register(kvm, tmp, tag_name) < 0) 189 die("Unable to initialize virtio 9p"); 190 } else 191 die("Failed resolving 9p path"); 192 return 0; 193 } 194 195 static int tty_parser(const struct option *opt, const char *arg, int unset) 196 { 197 int tty = atoi(arg); 198 199 term_set_tty(tty); 200 201 return 0; 202 } 203 204 static inline void str_to_mac(const char *str, char *mac) 205 { 206 sscanf(str, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", 207 mac, mac+1, mac+2, mac+3, mac+4, mac+5); 208 } 209 static int set_net_param(struct virtio_net_params *p, const char *param, 210 const char *val) 211 { 212 if (strcmp(param, "guest_mac") == 0) { 213 str_to_mac(val, p->guest_mac); 214 } else if (strcmp(param, "mode") == 0) { 215 if (!strncmp(val, "user", 4)) { 216 int i; 217 218 for (i = 0; i < num_net_devices; i++) 219 if (net_params[i].mode == NET_MODE_USER) 220 die("Only one usermode network device allowed at a time"); 221 p->mode = NET_MODE_USER; 222 } else if (!strncmp(val, "tap", 3)) { 223 p->mode = NET_MODE_TAP; 224 } else if (!strncmp(val, "none", 4)) { 225 no_net = 1; 226 return -1; 227 } else 228 die("Unkown network mode %s, please use user, tap or none", network); 229 } else if (strcmp(param, "script") == 0) { 230 p->script = strdup(val); 231 } else if (strcmp(param, "guest_ip") == 0) { 232 p->guest_ip = strdup(val); 233 } else if (strcmp(param, "host_ip") == 0) { 234 p->host_ip = strdup(val); 235 } else if (strcmp(param, "vhost") == 0) { 236 p->vhost = atoi(val); 237 } else if (strcmp(param, "fd") == 0) { 238 p->fd = atoi(val); 239 } 240 241 return 0; 242 } 243 244 static int netdev_parser(const struct option *opt, const char *arg, int unset) 245 { 246 struct virtio_net_params p; 247 char *buf = NULL, *cmd = NULL, *cur = NULL; 248 bool on_cmd = true; 249 250 if (arg) { 251 buf = strdup(arg); 252 if (buf == NULL) 253 die("Failed allocating new net buffer"); 254 cur = strtok(buf, ",="); 255 } 256 257 p = (struct virtio_net_params) { 258 .guest_ip = DEFAULT_GUEST_ADDR, 259 .host_ip = DEFAULT_HOST_ADDR, 260 .script = DEFAULT_SCRIPT, 261 .mode = NET_MODE_TAP, 262 }; 263 264 str_to_mac(DEFAULT_GUEST_MAC, p.guest_mac); 265 p.guest_mac[5] += num_net_devices; 266 267 while (cur) { 268 if (on_cmd) { 269 cmd = cur; 270 } else { 271 if (set_net_param(&p, cmd, cur) < 0) 272 goto done; 273 } 274 on_cmd = !on_cmd; 275 276 cur = strtok(NULL, ",="); 277 }; 278 279 num_net_devices++; 280 281 net_params = realloc(net_params, num_net_devices * sizeof(*net_params)); 282 if (net_params == NULL) 283 die("Failed adding new network device"); 284 285 net_params[num_net_devices - 1] = p; 286 287 done: 288 free(buf); 289 return 0; 290 } 291 292 static int shmem_parser(const struct option *opt, const char *arg, int unset) 293 { 294 const u64 default_size = SHMEM_DEFAULT_SIZE; 295 const u64 default_phys_addr = SHMEM_DEFAULT_ADDR; 296 const char *default_handle = SHMEM_DEFAULT_HANDLE; 297 struct shmem_info *si = malloc(sizeof(struct shmem_info)); 298 u64 phys_addr; 299 u64 size; 300 char *handle = NULL; 301 int create = 0; 302 const char *p = arg; 303 char *next; 304 int base = 10; 305 int verbose = 0; 306 307 const int skip_pci = strlen("pci:"); 308 if (verbose) 309 pr_info("shmem_parser(%p,%s,%d)", opt, arg, unset); 310 /* parse out optional addr family */ 311 if (strcasestr(p, "pci:")) { 312 p += skip_pci; 313 } else if (strcasestr(p, "mem:")) { 314 die("I can't add to E820 map yet.\n"); 315 } 316 /* parse out physical addr */ 317 base = 10; 318 if (strcasestr(p, "0x")) 319 base = 16; 320 phys_addr = strtoll(p, &next, base); 321 if (next == p && phys_addr == 0) { 322 pr_info("shmem: no physical addr specified, using default."); 323 phys_addr = default_phys_addr; 324 } 325 if (*next != ':' && *next != '\0') 326 die("shmem: unexpected chars after phys addr.\n"); 327 if (*next == '\0') 328 p = next; 329 else 330 p = next + 1; 331 /* parse out size */ 332 base = 10; 333 if (strcasestr(p, "0x")) 334 base = 16; 335 size = strtoll(p, &next, base); 336 if (next == p && size == 0) { 337 pr_info("shmem: no size specified, using default."); 338 size = default_size; 339 } 340 /* look for [KMGkmg][Bb]* uses base 2. */ 341 int skip_B = 0; 342 if (strspn(next, "KMGkmg")) { /* might have a prefix */ 343 if (*(next + 1) == 'B' || *(next + 1) == 'b') 344 skip_B = 1; 345 switch (*next) { 346 case 'K': 347 case 'k': 348 size = size << KB_SHIFT; 349 break; 350 case 'M': 351 case 'm': 352 size = size << MB_SHIFT; 353 break; 354 case 'G': 355 case 'g': 356 size = size << GB_SHIFT; 357 break; 358 default: 359 die("shmem: bug in detecting size prefix."); 360 break; 361 } 362 next += 1 + skip_B; 363 } 364 if (*next != ':' && *next != '\0') { 365 die("shmem: unexpected chars after phys size. <%c><%c>\n", 366 *next, *p); 367 } 368 if (*next == '\0') 369 p = next; 370 else 371 p = next + 1; 372 /* parse out optional shmem handle */ 373 const int skip_handle = strlen("handle="); 374 next = strcasestr(p, "handle="); 375 if (*p && next) { 376 if (p != next) 377 die("unexpected chars before handle\n"); 378 p += skip_handle; 379 next = strchrnul(p, ':'); 380 if (next - p) { 381 handle = malloc(next - p + 1); 382 strncpy(handle, p, next - p); 383 handle[next - p] = '\0'; /* just in case. */ 384 } 385 if (*next == '\0') 386 p = next; 387 else 388 p = next + 1; 389 } 390 /* parse optional create flag to see if we should create shm seg. */ 391 if (*p && strcasestr(p, "create")) { 392 create = 1; 393 p += strlen("create"); 394 } 395 if (*p != '\0') 396 die("shmem: unexpected trailing chars\n"); 397 if (handle == NULL) { 398 handle = malloc(strlen(default_handle) + 1); 399 strcpy(handle, default_handle); 400 } 401 if (verbose) { 402 pr_info("shmem: phys_addr = %llx", phys_addr); 403 pr_info("shmem: size = %llx", size); 404 pr_info("shmem: handle = %s", handle); 405 pr_info("shmem: create = %d", create); 406 } 407 408 si->phys_addr = phys_addr; 409 si->size = size; 410 si->handle = handle; 411 si->create = create; 412 pci_shmem__register_mem(si); /* ownership of si, etc. passed on. */ 413 return 0; 414 } 415 416 static const struct option options[] = { 417 OPT_GROUP("Basic options:"), 418 OPT_STRING('\0', "name", &guest_name, "guest name", 419 "A name for the guest"), 420 OPT_INTEGER('c', "cpus", &nrcpus, "Number of CPUs"), 421 OPT_U64('m', "mem", &ram_size, "Virtual machine memory size in MiB."), 422 OPT_CALLBACK('\0', "shmem", NULL, 423 "[pci:]<addr>:<size>[:handle=<handle>][:create]", 424 "Share host shmem with guest via pci device", 425 shmem_parser), 426 OPT_CALLBACK('d', "disk", NULL, "image or rootfs_dir", "Disk image or rootfs directory", img_name_parser), 427 OPT_BOOLEAN('\0', "balloon", &balloon, "Enable virtio balloon"), 428 OPT_BOOLEAN('\0', "vnc", &vnc, "Enable VNC framebuffer"), 429 OPT_BOOLEAN('\0', "sdl", &sdl, "Enable SDL framebuffer"), 430 OPT_BOOLEAN('\0', "rng", &virtio_rng, "Enable virtio Random Number Generator"), 431 OPT_CALLBACK('\0', "9p", NULL, "dir_to_share,tag_name", 432 "Enable virtio 9p to share files between host and guest", virtio_9p_rootdir_parser), 433 OPT_STRING('\0', "console", &console, "serial, virtio or hv", 434 "Console to use"), 435 OPT_STRING('\0', "dev", &dev, "device_file", "KVM device file"), 436 OPT_CALLBACK('\0', "tty", NULL, "tty id", 437 "Remap guest TTY into a pty on the host", 438 tty_parser), 439 OPT_STRING('\0', "sandbox", &sandbox, "script", 440 "Run this script when booting into custom rootfs"), 441 442 OPT_GROUP("Kernel options:"), 443 OPT_STRING('k', "kernel", &kernel_filename, "kernel", 444 "Kernel to boot in virtual machine"), 445 OPT_STRING('i', "initrd", &initrd_filename, "initrd", 446 "Initial RAM disk image"), 447 OPT_STRING('p', "params", &kernel_cmdline, "params", 448 "Kernel command line arguments"), 449 450 OPT_GROUP("Networking options:"), 451 OPT_CALLBACK_DEFAULT('n', "network", NULL, "network params", 452 "Create a new guest NIC", 453 netdev_parser, NULL), 454 OPT_BOOLEAN('\0', "no-dhcp", &no_dhcp, "Disable kernel DHCP in rootfs mode"), 455 456 OPT_GROUP("BIOS options:"), 457 OPT_INTEGER('\0', "vidmode", &vidmode, 458 "Video mode"), 459 460 OPT_GROUP("Debug options:"), 461 OPT_BOOLEAN('\0', "debug", &do_debug_print, 462 "Enable debug messages"), 463 OPT_BOOLEAN('\0', "debug-single-step", &single_step, 464 "Enable single stepping"), 465 OPT_BOOLEAN('\0', "debug-ioport", &ioport_debug, 466 "Enable ioport debugging"), 467 OPT_INTEGER('\0', "debug-iodelay", &debug_iodelay, 468 "Delay IO by millisecond"), 469 OPT_END() 470 }; 471 472 /* 473 * Serialize debug printout so that the output of multiple vcpus does not 474 * get mixed up: 475 */ 476 static int printout_done; 477 478 static void handle_sigusr1(int sig) 479 { 480 struct kvm_cpu *cpu = current_kvm_cpu; 481 int fd = kvm_cpu__get_debug_fd(); 482 483 if (!cpu || cpu->needs_nmi) 484 return; 485 486 dprintf(fd, "\n #\n # vCPU #%ld's dump:\n #\n", cpu->cpu_id); 487 kvm_cpu__show_registers(cpu); 488 kvm_cpu__show_code(cpu); 489 kvm_cpu__show_page_tables(cpu); 490 fflush(stdout); 491 printout_done = 1; 492 mb(); 493 } 494 495 /* Pause/resume the guest using SIGUSR2 */ 496 static int is_paused; 497 498 static void handle_pause(int fd, u32 type, u32 len, u8 *msg) 499 { 500 if (type == KVM_IPC_RESUME && is_paused) 501 kvm__continue(); 502 else if (type == KVM_IPC_PAUSE && !is_paused) 503 kvm__pause(); 504 else 505 return; 506 507 is_paused = !is_paused; 508 pr_info("Guest %s\n", is_paused ? "paused" : "resumed"); 509 } 510 511 static void handle_debug(int fd, u32 type, u32 len, u8 *msg) 512 { 513 int i; 514 struct debug_cmd_params *params = (void *)msg; 515 u32 dbg_type = params->dbg_type; 516 u32 vcpu = params->cpu; 517 518 if (dbg_type & KVM_DEBUG_CMD_TYPE_NMI) { 519 if ((int)vcpu >= kvm->nrcpus) 520 return; 521 522 kvm_cpus[vcpu]->needs_nmi = 1; 523 pthread_kill(kvm_cpus[vcpu]->thread, SIGUSR1); 524 } 525 526 if (!(dbg_type & KVM_DEBUG_CMD_TYPE_DUMP)) 527 return; 528 529 for (i = 0; i < nrcpus; i++) { 530 struct kvm_cpu *cpu = kvm_cpus[i]; 531 532 if (!cpu) 533 continue; 534 535 printout_done = 0; 536 537 kvm_cpu__set_debug_fd(fd); 538 pthread_kill(cpu->thread, SIGUSR1); 539 /* 540 * Wait for the vCPU to dump state before signalling 541 * the next thread. Since this is debug code it does 542 * not matter that we are burning CPU time a bit: 543 */ 544 while (!printout_done) 545 mb(); 546 } 547 548 close(fd); 549 550 serial8250__inject_sysrq(kvm); 551 } 552 553 static void handle_sigalrm(int sig) 554 { 555 kvm__arch_periodic_poll(kvm); 556 } 557 558 static void handle_stop(int fd, u32 type, u32 len, u8 *msg) 559 { 560 kvm_cpu__reboot(); 561 } 562 563 static void *kvm_cpu_thread(void *arg) 564 { 565 current_kvm_cpu = arg; 566 567 if (kvm_cpu__start(current_kvm_cpu)) 568 goto panic_kvm; 569 570 kvm_cpu__delete(current_kvm_cpu); 571 572 return (void *) (intptr_t) 0; 573 574 panic_kvm: 575 fprintf(stderr, "KVM exit reason: %u (\"%s\")\n", 576 current_kvm_cpu->kvm_run->exit_reason, 577 kvm_exit_reasons[current_kvm_cpu->kvm_run->exit_reason]); 578 if (current_kvm_cpu->kvm_run->exit_reason == KVM_EXIT_UNKNOWN) 579 fprintf(stderr, "KVM exit code: 0x%Lu\n", 580 current_kvm_cpu->kvm_run->hw.hardware_exit_reason); 581 582 kvm_cpu__set_debug_fd(STDOUT_FILENO); 583 kvm_cpu__show_registers(current_kvm_cpu); 584 kvm_cpu__show_code(current_kvm_cpu); 585 kvm_cpu__show_page_tables(current_kvm_cpu); 586 587 kvm_cpu__delete(current_kvm_cpu); 588 589 return (void *) (intptr_t) 1; 590 } 591 592 static char kernel[PATH_MAX]; 593 594 static const char *host_kernels[] = { 595 "/boot/vmlinuz", 596 "/boot/bzImage", 597 NULL 598 }; 599 600 static const char *default_kernels[] = { 601 "./bzImage", 602 "../../arch/" BUILD_ARCH "/boot/bzImage", 603 NULL 604 }; 605 606 static const char *default_vmlinux[] = { 607 "../../../vmlinux", 608 "../../vmlinux", 609 NULL 610 }; 611 612 static void kernel_usage_with_options(void) 613 { 614 const char **k; 615 struct utsname uts; 616 617 fprintf(stderr, "Fatal: could not find default kernel image in:\n"); 618 k = &default_kernels[0]; 619 while (*k) { 620 fprintf(stderr, "\t%s\n", *k); 621 k++; 622 } 623 624 if (uname(&uts) < 0) 625 return; 626 627 k = &host_kernels[0]; 628 while (*k) { 629 if (snprintf(kernel, PATH_MAX, "%s-%s", *k, uts.release) < 0) 630 return; 631 fprintf(stderr, "\t%s\n", kernel); 632 k++; 633 } 634 fprintf(stderr, "\nPlease see 'kvm run --help' for more options.\n\n"); 635 } 636 637 static u64 host_ram_size(void) 638 { 639 long page_size; 640 long nr_pages; 641 642 nr_pages = sysconf(_SC_PHYS_PAGES); 643 if (nr_pages < 0) { 644 pr_warning("sysconf(_SC_PHYS_PAGES) failed"); 645 return 0; 646 } 647 648 page_size = sysconf(_SC_PAGE_SIZE); 649 if (page_size < 0) { 650 pr_warning("sysconf(_SC_PAGE_SIZE) failed"); 651 return 0; 652 } 653 654 return (nr_pages * page_size) >> MB_SHIFT; 655 } 656 657 /* 658 * If user didn't specify how much memory it wants to allocate for the guest, 659 * avoid filling the whole host RAM. 660 */ 661 #define RAM_SIZE_RATIO 0.8 662 663 static u64 get_ram_size(int nr_cpus) 664 { 665 u64 available; 666 u64 ram_size; 667 668 ram_size = 64 * (nr_cpus + 3); 669 670 available = host_ram_size() * RAM_SIZE_RATIO; 671 if (!available) 672 available = MIN_RAM_SIZE_MB; 673 674 if (ram_size > available) 675 ram_size = available; 676 677 return ram_size; 678 } 679 680 static const char *find_kernel(void) 681 { 682 const char **k; 683 struct stat st; 684 struct utsname uts; 685 686 k = &default_kernels[0]; 687 while (*k) { 688 if (stat(*k, &st) < 0 || !S_ISREG(st.st_mode)) { 689 k++; 690 continue; 691 } 692 strncpy(kernel, *k, PATH_MAX); 693 return kernel; 694 } 695 696 if (uname(&uts) < 0) 697 return NULL; 698 699 k = &host_kernels[0]; 700 while (*k) { 701 if (snprintf(kernel, PATH_MAX, "%s-%s", *k, uts.release) < 0) 702 return NULL; 703 704 if (stat(kernel, &st) < 0 || !S_ISREG(st.st_mode)) { 705 k++; 706 continue; 707 } 708 return kernel; 709 710 } 711 return NULL; 712 } 713 714 static const char *find_vmlinux(void) 715 { 716 const char **vmlinux; 717 718 vmlinux = &default_vmlinux[0]; 719 while (*vmlinux) { 720 struct stat st; 721 722 if (stat(*vmlinux, &st) < 0 || !S_ISREG(st.st_mode)) { 723 vmlinux++; 724 continue; 725 } 726 return *vmlinux; 727 } 728 return NULL; 729 } 730 731 void kvm_run_help(void) 732 { 733 usage_with_options(run_usage, options); 734 } 735 736 static int kvm_custom_stage2(void) 737 { 738 char tmp[PATH_MAX], dst[PATH_MAX], *src; 739 const char *rootfs; 740 int r; 741 742 src = realpath("guest/init_stage2", NULL); 743 if (src == NULL) 744 return -ENOMEM; 745 746 if (image_filename[0] == NULL) 747 rootfs = "default"; 748 else 749 rootfs = image_filename[0]; 750 751 snprintf(tmp, PATH_MAX, "%s%s/virt/init_stage2", kvm__get_dir(), rootfs); 752 remove(tmp); 753 754 snprintf(dst, PATH_MAX, "/host/%s", src); 755 r = symlink(dst, tmp); 756 free(src); 757 758 return r; 759 } 760 761 static int kvm_run_set_sandbox(void) 762 { 763 const char *guestfs_name = "default"; 764 char path[PATH_MAX], script[PATH_MAX], *tmp; 765 766 if (image_filename[0]) 767 guestfs_name = image_filename[0]; 768 769 snprintf(path, PATH_MAX, "%s%s/virt/sandbox.sh", kvm__get_dir(), guestfs_name); 770 771 remove(path); 772 773 if (sandbox == NULL) 774 return 0; 775 776 tmp = realpath(sandbox, NULL); 777 if (tmp == NULL) 778 return -ENOMEM; 779 780 snprintf(script, PATH_MAX, "/host/%s", tmp); 781 free(tmp); 782 783 return symlink(script, path); 784 } 785 786 static void kvm_run_write_sandbox_cmd(const char **argv, int argc) 787 { 788 const char script_hdr[] = "#! /bin/bash\n\n"; 789 int fd; 790 791 remove(sandbox); 792 793 fd = open(sandbox, O_RDWR | O_CREAT, 0777); 794 if (fd < 0) 795 die("Failed creating sandbox script"); 796 797 if (write(fd, script_hdr, sizeof(script_hdr) - 1) <= 0) 798 die("Failed writing sandbox script"); 799 800 while (argc) { 801 if (write(fd, argv[0], strlen(argv[0])) <= 0) 802 die("Failed writing sandbox script"); 803 if (argc - 1) 804 if (write(fd, " ", 1) <= 0) 805 die("Failed writing sandbox script"); 806 argv++; 807 argc--; 808 } 809 if (write(fd, "\n", 1) <= 0) 810 die("Failed writing sandbox script"); 811 812 close(fd); 813 } 814 815 int kvm_cmd_run(int argc, const char **argv, const char *prefix) 816 { 817 static char real_cmdline[2048], default_name[20]; 818 struct framebuffer *fb = NULL; 819 unsigned int nr_online_cpus; 820 int exit_code = 0; 821 int max_cpus, recommended_cpus; 822 int i; 823 void *ret; 824 825 signal(SIGALRM, handle_sigalrm); 826 kvm_ipc__register_handler(KVM_IPC_DEBUG, handle_debug); 827 signal(SIGUSR1, handle_sigusr1); 828 kvm_ipc__register_handler(KVM_IPC_PAUSE, handle_pause); 829 kvm_ipc__register_handler(KVM_IPC_RESUME, handle_pause); 830 kvm_ipc__register_handler(KVM_IPC_STOP, handle_stop); 831 832 nr_online_cpus = sysconf(_SC_NPROCESSORS_ONLN); 833 834 while (argc != 0) { 835 argc = parse_options(argc, argv, options, run_usage, 836 PARSE_OPT_STOP_AT_NON_OPTION | 837 PARSE_OPT_KEEP_DASHDASH); 838 if (argc != 0) { 839 /* Cusrom options, should have been handled elsewhere */ 840 if (strcmp(argv[0], "--") == 0) { 841 if (kvm_run_wrapper == KVM_RUN_SANDBOX) { 842 sandbox = DEFAULT_SANDBOX_FILENAME; 843 kvm_run_write_sandbox_cmd(argv+1, argc-1); 844 break; 845 } 846 } 847 848 if (kernel_filename) { 849 fprintf(stderr, "Cannot handle parameter: " 850 "%s\n", argv[0]); 851 usage_with_options(run_usage, options); 852 return EINVAL; 853 } 854 /* first unhandled parameter is treated as a kernel 855 image 856 */ 857 kernel_filename = argv[0]; 858 argv++; 859 argc--; 860 } 861 862 } 863 864 if (!kernel_filename) 865 kernel_filename = find_kernel(); 866 867 if (!kernel_filename) { 868 kernel_usage_with_options(); 869 return EINVAL; 870 } 871 872 vmlinux_filename = find_vmlinux(); 873 874 if (nrcpus == 0) 875 nrcpus = nr_online_cpus; 876 else if (nrcpus < 1 || nrcpus > KVM_NR_CPUS) 877 die("Number of CPUs %d is out of [1;%d] range", nrcpus, KVM_NR_CPUS); 878 879 if (!ram_size) 880 ram_size = get_ram_size(nrcpus); 881 882 if (ram_size < MIN_RAM_SIZE_MB) 883 die("Not enough memory specified: %lluMB (min %lluMB)", ram_size, MIN_RAM_SIZE_MB); 884 885 if (ram_size > host_ram_size()) 886 pr_warning("Guest memory size %lluMB exceeds host physical RAM size %lluMB", ram_size, host_ram_size()); 887 888 ram_size <<= MB_SHIFT; 889 890 if (!dev) 891 dev = DEFAULT_KVM_DEV; 892 893 if (!console) 894 console = DEFAULT_CONSOLE; 895 896 if (!strncmp(console, "virtio", 6)) 897 active_console = CONSOLE_VIRTIO; 898 else if (!strncmp(console, "serial", 6)) 899 active_console = CONSOLE_8250; 900 else if (!strncmp(console, "hv", 2)) 901 active_console = CONSOLE_HV; 902 else 903 pr_warning("No console!"); 904 905 if (!host_ip) 906 host_ip = DEFAULT_HOST_ADDR; 907 908 if (!guest_ip) 909 guest_ip = DEFAULT_GUEST_ADDR; 910 911 if (!guest_mac) 912 guest_mac = DEFAULT_GUEST_MAC; 913 914 if (!host_mac) 915 host_mac = DEFAULT_HOST_MAC; 916 917 if (!script) 918 script = DEFAULT_SCRIPT; 919 920 symbol__init(vmlinux_filename); 921 922 term_init(); 923 924 if (!guest_name) { 925 sprintf(default_name, "guest-%u", getpid()); 926 guest_name = default_name; 927 } 928 929 kvm = kvm__init(dev, ram_size, guest_name); 930 931 kvm->single_step = single_step; 932 933 ioeventfd__init(); 934 935 max_cpus = kvm__max_cpus(kvm); 936 recommended_cpus = kvm__recommended_cpus(kvm); 937 938 if (nrcpus > max_cpus) { 939 printf(" # Limit the number of CPUs to %d\n", max_cpus); 940 nrcpus = max_cpus; 941 } else if (nrcpus > recommended_cpus) { 942 printf(" # Warning: The maximum recommended amount of VCPUs" 943 " is %d\n", recommended_cpus); 944 } 945 946 kvm->nrcpus = nrcpus; 947 948 irq__init(kvm); 949 950 pci__init(); 951 952 /* 953 * vidmode should be either specified 954 * either set by default 955 */ 956 if (vnc || sdl) { 957 if (vidmode == -1) 958 vidmode = 0x312; 959 } else 960 vidmode = 0; 961 962 memset(real_cmdline, 0, sizeof(real_cmdline)); 963 kvm__arch_set_cmdline(real_cmdline, vnc || sdl); 964 965 if (strlen(real_cmdline) > 0) 966 strcat(real_cmdline, " "); 967 968 if (kernel_cmdline) 969 strlcat(real_cmdline, kernel_cmdline, sizeof(real_cmdline)); 970 971 if (!using_rootfs && !image_filename[0]) { 972 char tmp[PATH_MAX]; 973 974 kvm_setup_create_new("default"); 975 kvm_setup_resolv("default"); 976 977 snprintf(tmp, PATH_MAX, "%s%s", kvm__get_dir(), "default"); 978 if (virtio_9p__register(kvm, tmp, "/dev/root") < 0) 979 die("Unable to initialize virtio 9p"); 980 if (virtio_9p__register(kvm, "/", "hostfs") < 0) 981 die("Unable to initialize virtio 9p"); 982 using_rootfs = custom_rootfs = 1; 983 } 984 985 if (using_rootfs) { 986 strcat(real_cmdline, " root=/dev/root rw rootflags=rw,trans=virtio,version=9p2000.L rootfstype=9p"); 987 if (custom_rootfs) { 988 kvm_run_set_sandbox(); 989 990 strcat(real_cmdline, " init=/virt/init"); 991 992 if (!no_dhcp) 993 strcat(real_cmdline, " ip=dhcp"); 994 if (kvm_custom_stage2()) 995 die("Failed linking stage 2 of init."); 996 } 997 } else if (!strstr(real_cmdline, "root=")) { 998 strlcat(real_cmdline, " root=/dev/vda rw ", sizeof(real_cmdline)); 999 } 1000 1001 if (image_count) { 1002 kvm->nr_disks = image_count; 1003 kvm->disks = disk_image__open_all(image_filename, readonly_image, image_count); 1004 if (!kvm->disks) 1005 die("Unable to load all disk images."); 1006 1007 virtio_blk__init_all(kvm); 1008 } 1009 1010 printf(" # kvm run -k %s -m %Lu -c %d --name %s\n", kernel_filename, ram_size / 1024 / 1024, nrcpus, guest_name); 1011 1012 if (!kvm__load_kernel(kvm, kernel_filename, initrd_filename, 1013 real_cmdline, vidmode)) 1014 die("unable to load kernel %s", kernel_filename); 1015 1016 kvm->vmlinux = vmlinux_filename; 1017 1018 ioport__setup_arch(); 1019 1020 rtc__init(); 1021 1022 serial8250__init(kvm); 1023 1024 if (active_console == CONSOLE_VIRTIO) 1025 virtio_console__init(kvm); 1026 1027 if (virtio_rng) 1028 virtio_rng__init(kvm); 1029 1030 if (balloon) 1031 virtio_bln__init(kvm); 1032 1033 if (!network) 1034 network = DEFAULT_NETWORK; 1035 1036 virtio_9p__init(kvm); 1037 1038 for (i = 0; i < num_net_devices; i++) { 1039 net_params[i].kvm = kvm; 1040 virtio_net__init(&net_params[i]); 1041 } 1042 1043 if (num_net_devices == 0 && no_net == 0) { 1044 struct virtio_net_params net_params; 1045 1046 net_params = (struct virtio_net_params) { 1047 .guest_ip = guest_ip, 1048 .host_ip = host_ip, 1049 .kvm = kvm, 1050 .script = script, 1051 .mode = NET_MODE_USER, 1052 }; 1053 str_to_mac(guest_mac, net_params.guest_mac); 1054 str_to_mac(host_mac, net_params.host_mac); 1055 1056 virtio_net__init(&net_params); 1057 } 1058 1059 kvm__init_ram(kvm); 1060 1061 #ifdef CONFIG_X86 1062 kbd__init(kvm); 1063 #endif 1064 1065 pci_shmem__init(kvm); 1066 1067 if (vnc || sdl) 1068 fb = vesa__init(kvm); 1069 1070 if (vnc) { 1071 if (fb) 1072 vnc__init(fb); 1073 } 1074 1075 if (sdl) { 1076 if (fb) 1077 sdl__init(fb); 1078 } 1079 1080 fb__start(); 1081 1082 /* Device init all done; firmware init must 1083 * come after this (it may set up device trees etc.) 1084 */ 1085 1086 kvm__start_timer(kvm); 1087 1088 kvm__arch_setup_firmware(kvm); 1089 1090 for (i = 0; i < nrcpus; i++) { 1091 kvm_cpus[i] = kvm_cpu__init(kvm, i); 1092 if (!kvm_cpus[i]) 1093 die("unable to initialize KVM VCPU"); 1094 } 1095 1096 thread_pool__init(nr_online_cpus); 1097 ioeventfd__start(); 1098 1099 for (i = 0; i < nrcpus; i++) { 1100 if (pthread_create(&kvm_cpus[i]->thread, NULL, kvm_cpu_thread, kvm_cpus[i]) != 0) 1101 die("unable to create KVM VCPU thread"); 1102 } 1103 1104 /* Only VCPU #0 is going to exit by itself when shutting down */ 1105 if (pthread_join(kvm_cpus[0]->thread, &ret) != 0) 1106 exit_code = 1; 1107 1108 for (i = 1; i < nrcpus; i++) { 1109 if (kvm_cpus[i]->is_running) { 1110 pthread_kill(kvm_cpus[i]->thread, SIGKVMEXIT); 1111 if (pthread_join(kvm_cpus[i]->thread, &ret) != 0) 1112 die("pthread_join"); 1113 } 1114 if (ret != NULL) 1115 exit_code = 1; 1116 } 1117 1118 compat__print_all_messages(); 1119 1120 fb__stop(); 1121 1122 virtio_blk__delete_all(kvm); 1123 virtio_rng__delete_all(kvm); 1124 1125 disk_image__close_all(kvm->disks, image_count); 1126 kvm__delete(kvm); 1127 1128 if (!exit_code) 1129 printf("\n # KVM session ended normally.\n"); 1130 1131 return exit_code; 1132 } 1133