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/vesa.h" 25 #include "kvm/irq.h" 26 #include "kvm/kvm.h" 27 #include "kvm/pci.h" 28 #include "kvm/rtc.h" 29 #include "kvm/sdl.h" 30 #include "kvm/vnc.h" 31 #include "kvm/guest_compat.h" 32 #include "kvm/pci-shmem.h" 33 #include "kvm/kvm-ipc.h" 34 35 #include <linux/types.h> 36 37 #include <sys/utsname.h> 38 #include <sys/types.h> 39 #include <sys/stat.h> 40 #include <termios.h> 41 #include <signal.h> 42 #include <stdlib.h> 43 #include <string.h> 44 #include <unistd.h> 45 #include <ctype.h> 46 #include <stdio.h> 47 48 #define DEFAULT_KVM_DEV "/dev/kvm" 49 #define DEFAULT_CONSOLE "serial" 50 #define DEFAULT_NETWORK "user" 51 #define DEFAULT_HOST_ADDR "192.168.33.1" 52 #define DEFAULT_GUEST_ADDR "192.168.33.15" 53 #define DEFAULT_GUEST_MAC "02:15:15:15:15:15" 54 #define DEFAULT_HOST_MAC "02:01:01:01:01:01" 55 #define DEFAULT_SCRIPT "none" 56 57 #define MB_SHIFT (20) 58 #define KB_SHIFT (10) 59 #define GB_SHIFT (30) 60 #define MIN_RAM_SIZE_MB (64ULL) 61 #define MIN_RAM_SIZE_BYTE (MIN_RAM_SIZE_MB << MB_SHIFT) 62 63 struct kvm *kvm; 64 struct kvm_cpu *kvm_cpus[KVM_NR_CPUS]; 65 __thread struct kvm_cpu *current_kvm_cpu; 66 67 static u64 ram_size; 68 static u8 image_count; 69 static u8 num_net_devices; 70 static bool virtio_rng; 71 static const char *kernel_cmdline; 72 static const char *kernel_filename; 73 static const char *vmlinux_filename; 74 static const char *initrd_filename; 75 static const char *image_filename[MAX_DISK_IMAGES]; 76 static const char *console; 77 static const char *dev; 78 static const char *network; 79 static const char *host_ip; 80 static const char *guest_ip; 81 static const char *guest_mac; 82 static const char *host_mac; 83 static const char *script; 84 static const char *guest_name; 85 static struct virtio_net_params *net_params; 86 static bool single_step; 87 static bool readonly_image[MAX_DISK_IMAGES]; 88 static bool vnc; 89 static bool sdl; 90 static bool balloon; 91 static bool using_rootfs; 92 static bool custom_rootfs; 93 static bool no_net; 94 extern bool ioport_debug; 95 extern int active_console; 96 extern int debug_iodelay; 97 98 bool do_debug_print = false; 99 100 static int nrcpus; 101 static int vidmode = -1; 102 103 static const char * const run_usage[] = { 104 "kvm run [<options>] [<kernel image>]", 105 NULL 106 }; 107 108 static int img_name_parser(const struct option *opt, const char *arg, int unset) 109 { 110 char *sep; 111 struct stat st; 112 char path[PATH_MAX]; 113 114 if (stat(arg, &st) == 0 && 115 S_ISDIR(st.st_mode)) { 116 char tmp[PATH_MAX]; 117 118 if (realpath(arg, tmp) == 0 || 119 virtio_9p__register(kvm, tmp, "/dev/root") < 0) 120 die("Unable to initialize virtio 9p"); 121 using_rootfs = 1; 122 return 0; 123 } 124 125 snprintf(path, PATH_MAX, "%s%s", kvm__get_dir(), arg); 126 127 if (stat(path, &st) == 0 && 128 S_ISDIR(st.st_mode)) { 129 char tmp[PATH_MAX]; 130 131 if (realpath(path, tmp) == 0 || 132 virtio_9p__register(kvm, tmp, "/dev/root") < 0) 133 die("Unable to initialize virtio 9p"); 134 if (virtio_9p__register(kvm, "/", "hostfs") < 0) 135 die("Unable to initialize virtio 9p"); 136 kvm_setup_resolv(arg); 137 using_rootfs = custom_rootfs = 1; 138 return 0; 139 } 140 141 if (image_count >= MAX_DISK_IMAGES) 142 die("Currently only 4 images are supported"); 143 144 image_filename[image_count] = arg; 145 sep = strstr(arg, ","); 146 if (sep) { 147 if (strcmp(sep + 1, "ro") == 0) 148 readonly_image[image_count] = 1; 149 *sep = 0; 150 } 151 152 image_count++; 153 154 return 0; 155 } 156 157 static int virtio_9p_rootdir_parser(const struct option *opt, const char *arg, int unset) 158 { 159 char *tag_name; 160 char tmp[PATH_MAX]; 161 162 /* 163 * 9p dir can be of the form dirname,tag_name or 164 * just dirname. In the later case we use the 165 * default tag name 166 */ 167 tag_name = strstr(arg, ","); 168 if (tag_name) { 169 *tag_name = '\0'; 170 tag_name++; 171 } 172 if (realpath(arg, tmp)) { 173 if (virtio_9p__register(kvm, tmp, tag_name) < 0) 174 die("Unable to initialize virtio 9p"); 175 } else 176 die("Failed resolving 9p path"); 177 return 0; 178 } 179 180 static int tty_parser(const struct option *opt, const char *arg, int unset) 181 { 182 int tty = atoi(arg); 183 184 term_set_tty(tty); 185 186 return 0; 187 } 188 189 static inline void str_to_mac(const char *str, char *mac) 190 { 191 sscanf(str, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", 192 mac, mac+1, mac+2, mac+3, mac+4, mac+5); 193 } 194 static int set_net_param(struct virtio_net_params *p, const char *param, 195 const char *val) 196 { 197 if (strcmp(param, "guest_mac") == 0) { 198 str_to_mac(val, p->guest_mac); 199 } else if (strcmp(param, "mode") == 0) { 200 if (!strncmp(val, "user", 4)) { 201 int i; 202 203 for (i = 0; i < num_net_devices; i++) 204 if (net_params[i].mode == NET_MODE_USER) 205 die("Only one usermode network device allowed at a time"); 206 p->mode = NET_MODE_USER; 207 } else if (!strncmp(val, "tap", 3)) { 208 p->mode = NET_MODE_TAP; 209 } else if (!strncmp(val, "none", 4)) { 210 no_net = 1; 211 return -1; 212 } else 213 die("Unkown network mode %s, please use user, tap or none", network); 214 } else if (strcmp(param, "script") == 0) { 215 p->script = strdup(val); 216 } else if (strcmp(param, "guest_ip") == 0) { 217 p->guest_ip = strdup(val); 218 } else if (strcmp(param, "host_ip") == 0) { 219 p->host_ip = strdup(val); 220 } else if (strcmp(param, "vhost") == 0) { 221 p->vhost = atoi(val); 222 } 223 224 return 0; 225 } 226 227 static int netdev_parser(const struct option *opt, const char *arg, int unset) 228 { 229 struct virtio_net_params p; 230 char *buf = NULL, *cmd = NULL, *cur = NULL; 231 bool on_cmd = true; 232 233 if (arg) { 234 buf = strdup(arg); 235 if (buf == NULL) 236 die("Failed allocating new net buffer"); 237 cur = strtok(buf, ",="); 238 } 239 240 p = (struct virtio_net_params) { 241 .guest_ip = DEFAULT_GUEST_ADDR, 242 .host_ip = DEFAULT_HOST_ADDR, 243 .script = DEFAULT_SCRIPT, 244 .mode = NET_MODE_TAP, 245 }; 246 247 str_to_mac(DEFAULT_GUEST_MAC, p.guest_mac); 248 p.guest_mac[5] += num_net_devices; 249 250 while (cur) { 251 if (on_cmd) { 252 cmd = cur; 253 } else { 254 if (set_net_param(&p, cmd, cur) < 0) 255 goto done; 256 } 257 on_cmd = !on_cmd; 258 259 cur = strtok(NULL, ",="); 260 }; 261 262 num_net_devices++; 263 264 net_params = realloc(net_params, num_net_devices * sizeof(*net_params)); 265 if (net_params == NULL) 266 die("Failed adding new network device"); 267 268 net_params[num_net_devices - 1] = p; 269 270 done: 271 free(buf); 272 return 0; 273 } 274 275 static int shmem_parser(const struct option *opt, const char *arg, int unset) 276 { 277 const u64 default_size = SHMEM_DEFAULT_SIZE; 278 const u64 default_phys_addr = SHMEM_DEFAULT_ADDR; 279 const char *default_handle = SHMEM_DEFAULT_HANDLE; 280 struct shmem_info *si = malloc(sizeof(struct shmem_info)); 281 u64 phys_addr; 282 u64 size; 283 char *handle = NULL; 284 int create = 0; 285 const char *p = arg; 286 char *next; 287 int base = 10; 288 int verbose = 0; 289 290 const int skip_pci = strlen("pci:"); 291 if (verbose) 292 pr_info("shmem_parser(%p,%s,%d)", opt, arg, unset); 293 /* parse out optional addr family */ 294 if (strcasestr(p, "pci:")) { 295 p += skip_pci; 296 } else if (strcasestr(p, "mem:")) { 297 die("I can't add to E820 map yet.\n"); 298 } 299 /* parse out physical addr */ 300 base = 10; 301 if (strcasestr(p, "0x")) 302 base = 16; 303 phys_addr = strtoll(p, &next, base); 304 if (next == p && phys_addr == 0) { 305 pr_info("shmem: no physical addr specified, using default."); 306 phys_addr = default_phys_addr; 307 } 308 if (*next != ':' && *next != '\0') 309 die("shmem: unexpected chars after phys addr.\n"); 310 if (*next == '\0') 311 p = next; 312 else 313 p = next + 1; 314 /* parse out size */ 315 base = 10; 316 if (strcasestr(p, "0x")) 317 base = 16; 318 size = strtoll(p, &next, base); 319 if (next == p && size == 0) { 320 pr_info("shmem: no size specified, using default."); 321 size = default_size; 322 } 323 /* look for [KMGkmg][Bb]* uses base 2. */ 324 int skip_B = 0; 325 if (strspn(next, "KMGkmg")) { /* might have a prefix */ 326 if (*(next + 1) == 'B' || *(next + 1) == 'b') 327 skip_B = 1; 328 switch (*next) { 329 case 'K': 330 case 'k': 331 size = size << KB_SHIFT; 332 break; 333 case 'M': 334 case 'm': 335 size = size << MB_SHIFT; 336 break; 337 case 'G': 338 case 'g': 339 size = size << GB_SHIFT; 340 break; 341 default: 342 die("shmem: bug in detecting size prefix."); 343 break; 344 } 345 next += 1 + skip_B; 346 } 347 if (*next != ':' && *next != '\0') { 348 die("shmem: unexpected chars after phys size. <%c><%c>\n", 349 *next, *p); 350 } 351 if (*next == '\0') 352 p = next; 353 else 354 p = next + 1; 355 /* parse out optional shmem handle */ 356 const int skip_handle = strlen("handle="); 357 next = strcasestr(p, "handle="); 358 if (*p && next) { 359 if (p != next) 360 die("unexpected chars before handle\n"); 361 p += skip_handle; 362 next = strchrnul(p, ':'); 363 if (next - p) { 364 handle = malloc(next - p + 1); 365 strncpy(handle, p, next - p); 366 handle[next - p] = '\0'; /* just in case. */ 367 } 368 if (*next == '\0') 369 p = next; 370 else 371 p = next + 1; 372 } 373 /* parse optional create flag to see if we should create shm seg. */ 374 if (*p && strcasestr(p, "create")) { 375 create = 1; 376 p += strlen("create"); 377 } 378 if (*p != '\0') 379 die("shmem: unexpected trailing chars\n"); 380 if (handle == NULL) { 381 handle = malloc(strlen(default_handle) + 1); 382 strcpy(handle, default_handle); 383 } 384 if (verbose) { 385 pr_info("shmem: phys_addr = %llx", phys_addr); 386 pr_info("shmem: size = %llx", size); 387 pr_info("shmem: handle = %s", handle); 388 pr_info("shmem: create = %d", create); 389 } 390 391 si->phys_addr = phys_addr; 392 si->size = size; 393 si->handle = handle; 394 si->create = create; 395 pci_shmem__register_mem(si); /* ownership of si, etc. passed on. */ 396 return 0; 397 } 398 399 static const struct option options[] = { 400 OPT_GROUP("Basic options:"), 401 OPT_STRING('\0', "name", &guest_name, "guest name", 402 "A name for the guest"), 403 OPT_INTEGER('c', "cpus", &nrcpus, "Number of CPUs"), 404 OPT_U64('m', "mem", &ram_size, "Virtual machine memory size in MiB."), 405 OPT_CALLBACK('\0', "shmem", NULL, 406 "[pci:]<addr>:<size>[:handle=<handle>][:create]", 407 "Share host shmem with guest via pci device", 408 shmem_parser), 409 OPT_CALLBACK('d', "disk", NULL, "image or rootfs_dir", "Disk image or rootfs directory", img_name_parser), 410 OPT_BOOLEAN('\0', "balloon", &balloon, "Enable virtio balloon"), 411 OPT_BOOLEAN('\0', "vnc", &vnc, "Enable VNC framebuffer"), 412 OPT_BOOLEAN('\0', "sdl", &sdl, "Enable SDL framebuffer"), 413 OPT_BOOLEAN('\0', "rng", &virtio_rng, "Enable virtio Random Number Generator"), 414 OPT_CALLBACK('\0', "9p", NULL, "dir_to_share,tag_name", 415 "Enable virtio 9p to share files between host and guest", virtio_9p_rootdir_parser), 416 OPT_STRING('\0', "console", &console, "serial or virtio", 417 "Console to use"), 418 OPT_STRING('\0', "dev", &dev, "device_file", "KVM device file"), 419 OPT_CALLBACK('\0', "tty", NULL, "tty id", 420 "Remap guest TTY into a pty on the host", 421 tty_parser), 422 423 OPT_GROUP("Kernel options:"), 424 OPT_STRING('k', "kernel", &kernel_filename, "kernel", 425 "Kernel to boot in virtual machine"), 426 OPT_STRING('i', "initrd", &initrd_filename, "initrd", 427 "Initial RAM disk image"), 428 OPT_STRING('p', "params", &kernel_cmdline, "params", 429 "Kernel command line arguments"), 430 431 OPT_GROUP("Networking options:"), 432 OPT_CALLBACK_DEFAULT('n', "network", NULL, "network params", 433 "Create a new guest NIC", 434 netdev_parser, NULL), 435 436 OPT_GROUP("BIOS options:"), 437 OPT_INTEGER('\0', "vidmode", &vidmode, 438 "Video mode"), 439 440 OPT_GROUP("Debug options:"), 441 OPT_BOOLEAN('\0', "debug", &do_debug_print, 442 "Enable debug messages"), 443 OPT_BOOLEAN('\0', "debug-single-step", &single_step, 444 "Enable single stepping"), 445 OPT_BOOLEAN('\0', "debug-ioport", &ioport_debug, 446 "Enable ioport debugging"), 447 OPT_INTEGER('\0', "debug-iodelay", &debug_iodelay, 448 "Delay IO by millisecond"), 449 OPT_END() 450 }; 451 452 /* 453 * Serialize debug printout so that the output of multiple vcpus does not 454 * get mixed up: 455 */ 456 static int printout_done; 457 458 static void handle_sigusr1(int sig) 459 { 460 struct kvm_cpu *cpu = current_kvm_cpu; 461 int fd = kvm_cpu__get_debug_fd(); 462 463 if (!cpu) 464 return; 465 466 dprintf(fd, "\n #\n # vCPU #%ld's dump:\n #\n", cpu->cpu_id); 467 kvm_cpu__show_registers(cpu); 468 kvm_cpu__show_code(cpu); 469 kvm_cpu__show_page_tables(cpu); 470 fflush(stdout); 471 printout_done = 1; 472 mb(); 473 } 474 475 /* Pause/resume the guest using SIGUSR2 */ 476 static int is_paused; 477 478 static void handle_pause(int fd, u32 type, u32 len, u8 *msg) 479 { 480 if (type == KVM_IPC_RESUME && is_paused) 481 kvm__continue(); 482 else if (type == KVM_IPC_PAUSE && !is_paused) 483 kvm__pause(); 484 else 485 return; 486 487 is_paused = !is_paused; 488 pr_info("Guest %s\n", is_paused ? "paused" : "resumed"); 489 } 490 491 static void handle_debug(int fd, u32 type, u32 len, u8 *msg) 492 { 493 int i; 494 495 for (i = 0; i < nrcpus; i++) { 496 struct kvm_cpu *cpu = kvm_cpus[i]; 497 498 if (!cpu) 499 continue; 500 501 printout_done = 0; 502 503 kvm_cpu__set_debug_fd(fd); 504 pthread_kill(cpu->thread, SIGUSR1); 505 /* 506 * Wait for the vCPU to dump state before signalling 507 * the next thread. Since this is debug code it does 508 * not matter that we are burning CPU time a bit: 509 */ 510 while (!printout_done) 511 mb(); 512 } 513 514 close(fd); 515 516 serial8250__inject_sysrq(kvm); 517 } 518 519 static void handle_sigalrm(int sig) 520 { 521 serial8250__inject_interrupt(kvm); 522 virtio_console__inject_interrupt(kvm); 523 } 524 525 static void handle_stop(int fd, u32 type, u32 len, u8 *msg) 526 { 527 kvm_cpu__reboot(); 528 } 529 530 static void *kvm_cpu_thread(void *arg) 531 { 532 current_kvm_cpu = arg; 533 534 if (kvm_cpu__start(current_kvm_cpu)) 535 goto panic_kvm; 536 537 kvm_cpu__delete(current_kvm_cpu); 538 539 return (void *) (intptr_t) 0; 540 541 panic_kvm: 542 fprintf(stderr, "KVM exit reason: %u (\"%s\")\n", 543 current_kvm_cpu->kvm_run->exit_reason, 544 kvm_exit_reasons[current_kvm_cpu->kvm_run->exit_reason]); 545 if (current_kvm_cpu->kvm_run->exit_reason == KVM_EXIT_UNKNOWN) 546 fprintf(stderr, "KVM exit code: 0x%Lu\n", 547 current_kvm_cpu->kvm_run->hw.hardware_exit_reason); 548 549 kvm_cpu__set_debug_fd(STDOUT_FILENO); 550 kvm_cpu__show_registers(current_kvm_cpu); 551 kvm_cpu__show_code(current_kvm_cpu); 552 kvm_cpu__show_page_tables(current_kvm_cpu); 553 554 kvm_cpu__delete(current_kvm_cpu); 555 556 return (void *) (intptr_t) 1; 557 } 558 559 static char kernel[PATH_MAX]; 560 561 static const char *host_kernels[] = { 562 "/boot/vmlinuz", 563 "/boot/bzImage", 564 NULL 565 }; 566 567 static const char *default_kernels[] = { 568 "./bzImage", 569 "../../arch/x86/boot/bzImage", 570 NULL 571 }; 572 573 static const char *default_vmlinux[] = { 574 "../../../vmlinux", 575 "../../vmlinux", 576 NULL 577 }; 578 579 static void kernel_usage_with_options(void) 580 { 581 const char **k; 582 struct utsname uts; 583 584 fprintf(stderr, "Fatal: could not find default kernel image in:\n"); 585 k = &default_kernels[0]; 586 while (*k) { 587 fprintf(stderr, "\t%s\n", *k); 588 k++; 589 } 590 591 if (uname(&uts) < 0) 592 return; 593 594 k = &host_kernels[0]; 595 while (*k) { 596 if (snprintf(kernel, PATH_MAX, "%s-%s", *k, uts.release) < 0) 597 return; 598 fprintf(stderr, "\t%s\n", kernel); 599 k++; 600 } 601 fprintf(stderr, "\nPlease see 'kvm run --help' for more options.\n\n"); 602 } 603 604 static u64 host_ram_size(void) 605 { 606 long page_size; 607 long nr_pages; 608 609 nr_pages = sysconf(_SC_PHYS_PAGES); 610 if (nr_pages < 0) { 611 pr_warning("sysconf(_SC_PHYS_PAGES) failed"); 612 return 0; 613 } 614 615 page_size = sysconf(_SC_PAGE_SIZE); 616 if (page_size < 0) { 617 pr_warning("sysconf(_SC_PAGE_SIZE) failed"); 618 return 0; 619 } 620 621 return (nr_pages * page_size) >> MB_SHIFT; 622 } 623 624 /* 625 * If user didn't specify how much memory it wants to allocate for the guest, 626 * avoid filling the whole host RAM. 627 */ 628 #define RAM_SIZE_RATIO 0.8 629 630 static u64 get_ram_size(int nr_cpus) 631 { 632 u64 available; 633 u64 ram_size; 634 635 ram_size = 64 * (nr_cpus + 3); 636 637 available = host_ram_size() * RAM_SIZE_RATIO; 638 if (!available) 639 available = MIN_RAM_SIZE_MB; 640 641 if (ram_size > available) 642 ram_size = available; 643 644 return ram_size; 645 } 646 647 static const char *find_kernel(void) 648 { 649 const char **k; 650 struct stat st; 651 struct utsname uts; 652 653 k = &default_kernels[0]; 654 while (*k) { 655 if (stat(*k, &st) < 0 || !S_ISREG(st.st_mode)) { 656 k++; 657 continue; 658 } 659 strncpy(kernel, *k, PATH_MAX); 660 return kernel; 661 } 662 663 if (uname(&uts) < 0) 664 return NULL; 665 666 k = &host_kernels[0]; 667 while (*k) { 668 if (snprintf(kernel, PATH_MAX, "%s-%s", *k, uts.release) < 0) 669 return NULL; 670 671 if (stat(kernel, &st) < 0 || !S_ISREG(st.st_mode)) { 672 k++; 673 continue; 674 } 675 return kernel; 676 677 } 678 return NULL; 679 } 680 681 static const char *find_vmlinux(void) 682 { 683 const char **vmlinux; 684 685 vmlinux = &default_vmlinux[0]; 686 while (*vmlinux) { 687 struct stat st; 688 689 if (stat(*vmlinux, &st) < 0 || !S_ISREG(st.st_mode)) { 690 vmlinux++; 691 continue; 692 } 693 return *vmlinux; 694 } 695 return NULL; 696 } 697 698 void kvm_run_help(void) 699 { 700 usage_with_options(run_usage, options); 701 } 702 703 int kvm_cmd_run(int argc, const char **argv, const char *prefix) 704 { 705 static char real_cmdline[2048], default_name[20]; 706 struct framebuffer *fb = NULL; 707 unsigned int nr_online_cpus; 708 int exit_code = 0; 709 int max_cpus, recommended_cpus; 710 int i; 711 void *ret; 712 713 signal(SIGALRM, handle_sigalrm); 714 kvm_ipc__register_handler(KVM_IPC_DEBUG, handle_debug); 715 signal(SIGUSR1, handle_sigusr1); 716 kvm_ipc__register_handler(KVM_IPC_PAUSE, handle_pause); 717 kvm_ipc__register_handler(KVM_IPC_RESUME, handle_pause); 718 kvm_ipc__register_handler(KVM_IPC_STOP, handle_stop); 719 720 nr_online_cpus = sysconf(_SC_NPROCESSORS_ONLN); 721 722 while (argc != 0) { 723 argc = parse_options(argc, argv, options, run_usage, 724 PARSE_OPT_STOP_AT_NON_OPTION); 725 if (argc != 0) { 726 if (kernel_filename) { 727 fprintf(stderr, "Cannot handle parameter: " 728 "%s\n", argv[0]); 729 usage_with_options(run_usage, options); 730 return EINVAL; 731 } 732 /* first unhandled parameter is treated as a kernel 733 image 734 */ 735 kernel_filename = argv[0]; 736 argv++; 737 argc--; 738 } 739 740 } 741 742 if (!kernel_filename) 743 kernel_filename = find_kernel(); 744 745 if (!kernel_filename) { 746 kernel_usage_with_options(); 747 return EINVAL; 748 } 749 750 vmlinux_filename = find_vmlinux(); 751 752 if (nrcpus == 0) 753 nrcpus = nr_online_cpus; 754 else if (nrcpus < 1 || nrcpus > KVM_NR_CPUS) 755 die("Number of CPUs %d is out of [1;%d] range", nrcpus, KVM_NR_CPUS); 756 757 if (!ram_size) 758 ram_size = get_ram_size(nrcpus); 759 760 if (ram_size < MIN_RAM_SIZE_MB) 761 die("Not enough memory specified: %lluMB (min %lluMB)", ram_size, MIN_RAM_SIZE_MB); 762 763 if (ram_size > host_ram_size()) 764 pr_warning("Guest memory size %lluMB exceeds host physical RAM size %lluMB", ram_size, host_ram_size()); 765 766 ram_size <<= MB_SHIFT; 767 768 if (!dev) 769 dev = DEFAULT_KVM_DEV; 770 771 if (!console) 772 console = DEFAULT_CONSOLE; 773 774 if (!strncmp(console, "virtio", 6)) 775 active_console = CONSOLE_VIRTIO; 776 else 777 active_console = CONSOLE_8250; 778 779 if (!host_ip) 780 host_ip = DEFAULT_HOST_ADDR; 781 782 if (!guest_ip) 783 guest_ip = DEFAULT_GUEST_ADDR; 784 785 if (!guest_mac) 786 guest_mac = DEFAULT_GUEST_MAC; 787 788 if (!host_mac) 789 host_mac = DEFAULT_HOST_MAC; 790 791 if (!script) 792 script = DEFAULT_SCRIPT; 793 794 symbol__init(vmlinux_filename); 795 796 term_init(); 797 798 if (!guest_name) { 799 sprintf(default_name, "guest-%u", getpid()); 800 guest_name = default_name; 801 } 802 803 kvm = kvm__init(dev, ram_size, guest_name); 804 805 irq__init(kvm); 806 807 kvm->single_step = single_step; 808 809 ioeventfd__init(); 810 811 max_cpus = kvm__max_cpus(kvm); 812 recommended_cpus = kvm__recommended_cpus(kvm); 813 814 if (nrcpus > max_cpus) { 815 printf(" # Limit the number of CPUs to %d\n", max_cpus); 816 kvm->nrcpus = max_cpus; 817 } else if (nrcpus > recommended_cpus) { 818 printf(" # Warning: The maximum recommended amount of VCPUs" 819 " is %d\n", recommended_cpus); 820 } 821 822 kvm->nrcpus = nrcpus; 823 824 /* 825 * vidmode should be either specified 826 * either set by default 827 */ 828 if (vnc || sdl) { 829 if (vidmode == -1) 830 vidmode = 0x312; 831 } else 832 vidmode = 0; 833 834 memset(real_cmdline, 0, sizeof(real_cmdline)); 835 strcpy(real_cmdline, "noapic noacpi pci=conf1 reboot=k panic=1 i8042.direct=1 " 836 "i8042.dumbkbd=1 i8042.nopnp=1"); 837 if (vnc || sdl) { 838 strcat(real_cmdline, " video=vesafb console=tty0"); 839 } else 840 strcat(real_cmdline, " console=ttyS0 earlyprintk=serial i8042.noaux=1"); 841 strcat(real_cmdline, " "); 842 if (kernel_cmdline) 843 strlcat(real_cmdline, kernel_cmdline, sizeof(real_cmdline)); 844 845 if (!using_rootfs && !image_filename[0]) { 846 char tmp[PATH_MAX]; 847 848 kvm_setup_create_new("default"); 849 kvm_setup_resolv("default"); 850 851 snprintf(tmp, PATH_MAX, "%s%s", kvm__get_dir(), "default"); 852 if (virtio_9p__register(kvm, tmp, "/dev/root") < 0) 853 die("Unable to initialize virtio 9p"); 854 if (virtio_9p__register(kvm, "/", "hostfs") < 0) 855 die("Unable to initialize virtio 9p"); 856 using_rootfs = custom_rootfs = 1; 857 858 if (!strstr(real_cmdline, "init=")) 859 strlcat(real_cmdline, " init=/bin/sh ", sizeof(real_cmdline)); 860 } 861 862 if (using_rootfs) { 863 strcat(real_cmdline, " root=/dev/root rw rootflags=rw,trans=virtio,version=9p2000.L rootfstype=9p"); 864 if (custom_rootfs) 865 strcat(real_cmdline, " init=/virt/init ip=dhcp"); 866 } else if (!strstr(real_cmdline, "root=")) { 867 strlcat(real_cmdline, " root=/dev/vda rw ", sizeof(real_cmdline)); 868 } 869 870 if (image_count) { 871 kvm->nr_disks = image_count; 872 kvm->disks = disk_image__open_all(image_filename, readonly_image, image_count); 873 if (!kvm->disks) 874 die("Unable to load all disk images."); 875 876 virtio_blk__init_all(kvm); 877 } 878 879 printf(" # kvm run -k %s -m %Lu -c %d --name %s\n", kernel_filename, ram_size / 1024 / 1024, nrcpus, guest_name); 880 881 if (!kvm__load_kernel(kvm, kernel_filename, initrd_filename, 882 real_cmdline, vidmode)) 883 die("unable to load kernel %s", kernel_filename); 884 885 kvm->vmlinux = vmlinux_filename; 886 887 ioport__setup_legacy(); 888 889 rtc__init(); 890 891 serial8250__init(kvm); 892 893 pci__init(); 894 895 if (active_console == CONSOLE_VIRTIO) 896 virtio_console__init(kvm); 897 898 if (virtio_rng) 899 virtio_rng__init(kvm); 900 901 if (balloon) 902 virtio_bln__init(kvm); 903 904 if (!network) 905 network = DEFAULT_NETWORK; 906 907 virtio_9p__init(kvm); 908 909 for (i = 0; i < num_net_devices; i++) { 910 net_params[i].kvm = kvm; 911 virtio_net__init(&net_params[i]); 912 } 913 914 if (num_net_devices == 0 && no_net == 0) { 915 struct virtio_net_params net_params; 916 917 net_params = (struct virtio_net_params) { 918 .guest_ip = guest_ip, 919 .host_ip = host_ip, 920 .kvm = kvm, 921 .script = script, 922 .mode = NET_MODE_USER, 923 }; 924 str_to_mac(guest_mac, net_params.guest_mac); 925 str_to_mac(host_mac, net_params.host_mac); 926 927 virtio_net__init(&net_params); 928 } 929 930 kvm__start_timer(kvm); 931 932 kvm__setup_bios(kvm); 933 934 for (i = 0; i < nrcpus; i++) { 935 kvm_cpus[i] = kvm_cpu__init(kvm, i); 936 if (!kvm_cpus[i]) 937 die("unable to initialize KVM VCPU"); 938 } 939 940 kvm__init_ram(kvm); 941 942 kbd__init(kvm); 943 944 pci_shmem__init(kvm); 945 946 if (vnc || sdl) 947 fb = vesa__init(kvm); 948 949 if (vnc) { 950 if (fb) 951 vnc__init(fb); 952 } 953 954 if (sdl) { 955 if (fb) 956 sdl__init(fb); 957 } 958 959 fb__start(); 960 961 thread_pool__init(nr_online_cpus); 962 ioeventfd__start(); 963 964 for (i = 0; i < nrcpus; i++) { 965 if (pthread_create(&kvm_cpus[i]->thread, NULL, kvm_cpu_thread, kvm_cpus[i]) != 0) 966 die("unable to create KVM VCPU thread"); 967 } 968 969 /* Only VCPU #0 is going to exit by itself when shutting down */ 970 if (pthread_join(kvm_cpus[0]->thread, &ret) != 0) 971 exit_code = 1; 972 973 for (i = 1; i < nrcpus; i++) { 974 if (kvm_cpus[i]->is_running) { 975 pthread_kill(kvm_cpus[i]->thread, SIGKVMEXIT); 976 if (pthread_join(kvm_cpus[i]->thread, &ret) != 0) 977 die("pthread_join"); 978 } 979 if (ret != NULL) 980 exit_code = 1; 981 } 982 983 compat__print_all_messages(); 984 985 fb__stop(); 986 987 virtio_blk__delete_all(kvm); 988 virtio_rng__delete_all(kvm); 989 990 disk_image__close_all(kvm->disks, image_count); 991 kvm__delete(kvm); 992 993 if (!exit_code) 994 printf("\n # KVM session ended normally.\n"); 995 996 return exit_code; 997 } 998