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 static bool no_dhcp; 95 extern bool ioport_debug; 96 extern int active_console; 97 extern int debug_iodelay; 98 99 bool do_debug_print = false; 100 101 static int nrcpus; 102 static int vidmode = -1; 103 104 static const char * const run_usage[] = { 105 "kvm run [<options>] [<kernel image>]", 106 NULL 107 }; 108 109 static int img_name_parser(const struct option *opt, const char *arg, int unset) 110 { 111 char *sep; 112 struct stat st; 113 char path[PATH_MAX]; 114 115 if (stat(arg, &st) == 0 && 116 S_ISDIR(st.st_mode)) { 117 char tmp[PATH_MAX]; 118 119 if (realpath(arg, tmp) == 0 || 120 virtio_9p__register(kvm, tmp, "/dev/root") < 0) 121 die("Unable to initialize virtio 9p"); 122 using_rootfs = 1; 123 return 0; 124 } 125 126 snprintf(path, PATH_MAX, "%s%s", kvm__get_dir(), arg); 127 128 if (stat(path, &st) == 0 && 129 S_ISDIR(st.st_mode)) { 130 char tmp[PATH_MAX]; 131 132 if (realpath(path, tmp) == 0 || 133 virtio_9p__register(kvm, tmp, "/dev/root") < 0) 134 die("Unable to initialize virtio 9p"); 135 if (virtio_9p__register(kvm, "/", "hostfs") < 0) 136 die("Unable to initialize virtio 9p"); 137 kvm_setup_resolv(arg); 138 using_rootfs = custom_rootfs = 1; 139 return 0; 140 } 141 142 if (image_count >= MAX_DISK_IMAGES) 143 die("Currently only 4 images are supported"); 144 145 image_filename[image_count] = arg; 146 sep = strstr(arg, ","); 147 if (sep) { 148 if (strcmp(sep + 1, "ro") == 0) 149 readonly_image[image_count] = 1; 150 *sep = 0; 151 } 152 153 image_count++; 154 155 return 0; 156 } 157 158 static int virtio_9p_rootdir_parser(const struct option *opt, const char *arg, int unset) 159 { 160 char *tag_name; 161 char tmp[PATH_MAX]; 162 163 /* 164 * 9p dir can be of the form dirname,tag_name or 165 * just dirname. In the later case we use the 166 * default tag name 167 */ 168 tag_name = strstr(arg, ","); 169 if (tag_name) { 170 *tag_name = '\0'; 171 tag_name++; 172 } 173 if (realpath(arg, tmp)) { 174 if (virtio_9p__register(kvm, tmp, tag_name) < 0) 175 die("Unable to initialize virtio 9p"); 176 } else 177 die("Failed resolving 9p path"); 178 return 0; 179 } 180 181 static int tty_parser(const struct option *opt, const char *arg, int unset) 182 { 183 int tty = atoi(arg); 184 185 term_set_tty(tty); 186 187 return 0; 188 } 189 190 static inline void str_to_mac(const char *str, char *mac) 191 { 192 sscanf(str, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", 193 mac, mac+1, mac+2, mac+3, mac+4, mac+5); 194 } 195 static int set_net_param(struct virtio_net_params *p, const char *param, 196 const char *val) 197 { 198 if (strcmp(param, "guest_mac") == 0) { 199 str_to_mac(val, p->guest_mac); 200 } else if (strcmp(param, "mode") == 0) { 201 if (!strncmp(val, "user", 4)) { 202 int i; 203 204 for (i = 0; i < num_net_devices; i++) 205 if (net_params[i].mode == NET_MODE_USER) 206 die("Only one usermode network device allowed at a time"); 207 p->mode = NET_MODE_USER; 208 } else if (!strncmp(val, "tap", 3)) { 209 p->mode = NET_MODE_TAP; 210 } else if (!strncmp(val, "none", 4)) { 211 no_net = 1; 212 return -1; 213 } else 214 die("Unkown network mode %s, please use user, tap or none", network); 215 } else if (strcmp(param, "script") == 0) { 216 p->script = strdup(val); 217 } else if (strcmp(param, "guest_ip") == 0) { 218 p->guest_ip = strdup(val); 219 } else if (strcmp(param, "host_ip") == 0) { 220 p->host_ip = strdup(val); 221 } else if (strcmp(param, "vhost") == 0) { 222 p->vhost = atoi(val); 223 } 224 225 return 0; 226 } 227 228 static int netdev_parser(const struct option *opt, const char *arg, int unset) 229 { 230 struct virtio_net_params p; 231 char *buf = NULL, *cmd = NULL, *cur = NULL; 232 bool on_cmd = true; 233 234 if (arg) { 235 buf = strdup(arg); 236 if (buf == NULL) 237 die("Failed allocating new net buffer"); 238 cur = strtok(buf, ",="); 239 } 240 241 p = (struct virtio_net_params) { 242 .guest_ip = DEFAULT_GUEST_ADDR, 243 .host_ip = DEFAULT_HOST_ADDR, 244 .script = DEFAULT_SCRIPT, 245 .mode = NET_MODE_TAP, 246 }; 247 248 str_to_mac(DEFAULT_GUEST_MAC, p.guest_mac); 249 p.guest_mac[5] += num_net_devices; 250 251 while (cur) { 252 if (on_cmd) { 253 cmd = cur; 254 } else { 255 if (set_net_param(&p, cmd, cur) < 0) 256 goto done; 257 } 258 on_cmd = !on_cmd; 259 260 cur = strtok(NULL, ",="); 261 }; 262 263 num_net_devices++; 264 265 net_params = realloc(net_params, num_net_devices * sizeof(*net_params)); 266 if (net_params == NULL) 267 die("Failed adding new network device"); 268 269 net_params[num_net_devices - 1] = p; 270 271 done: 272 free(buf); 273 return 0; 274 } 275 276 static int shmem_parser(const struct option *opt, const char *arg, int unset) 277 { 278 const u64 default_size = SHMEM_DEFAULT_SIZE; 279 const u64 default_phys_addr = SHMEM_DEFAULT_ADDR; 280 const char *default_handle = SHMEM_DEFAULT_HANDLE; 281 struct shmem_info *si = malloc(sizeof(struct shmem_info)); 282 u64 phys_addr; 283 u64 size; 284 char *handle = NULL; 285 int create = 0; 286 const char *p = arg; 287 char *next; 288 int base = 10; 289 int verbose = 0; 290 291 const int skip_pci = strlen("pci:"); 292 if (verbose) 293 pr_info("shmem_parser(%p,%s,%d)", opt, arg, unset); 294 /* parse out optional addr family */ 295 if (strcasestr(p, "pci:")) { 296 p += skip_pci; 297 } else if (strcasestr(p, "mem:")) { 298 die("I can't add to E820 map yet.\n"); 299 } 300 /* parse out physical addr */ 301 base = 10; 302 if (strcasestr(p, "0x")) 303 base = 16; 304 phys_addr = strtoll(p, &next, base); 305 if (next == p && phys_addr == 0) { 306 pr_info("shmem: no physical addr specified, using default."); 307 phys_addr = default_phys_addr; 308 } 309 if (*next != ':' && *next != '\0') 310 die("shmem: unexpected chars after phys addr.\n"); 311 if (*next == '\0') 312 p = next; 313 else 314 p = next + 1; 315 /* parse out size */ 316 base = 10; 317 if (strcasestr(p, "0x")) 318 base = 16; 319 size = strtoll(p, &next, base); 320 if (next == p && size == 0) { 321 pr_info("shmem: no size specified, using default."); 322 size = default_size; 323 } 324 /* look for [KMGkmg][Bb]* uses base 2. */ 325 int skip_B = 0; 326 if (strspn(next, "KMGkmg")) { /* might have a prefix */ 327 if (*(next + 1) == 'B' || *(next + 1) == 'b') 328 skip_B = 1; 329 switch (*next) { 330 case 'K': 331 case 'k': 332 size = size << KB_SHIFT; 333 break; 334 case 'M': 335 case 'm': 336 size = size << MB_SHIFT; 337 break; 338 case 'G': 339 case 'g': 340 size = size << GB_SHIFT; 341 break; 342 default: 343 die("shmem: bug in detecting size prefix."); 344 break; 345 } 346 next += 1 + skip_B; 347 } 348 if (*next != ':' && *next != '\0') { 349 die("shmem: unexpected chars after phys size. <%c><%c>\n", 350 *next, *p); 351 } 352 if (*next == '\0') 353 p = next; 354 else 355 p = next + 1; 356 /* parse out optional shmem handle */ 357 const int skip_handle = strlen("handle="); 358 next = strcasestr(p, "handle="); 359 if (*p && next) { 360 if (p != next) 361 die("unexpected chars before handle\n"); 362 p += skip_handle; 363 next = strchrnul(p, ':'); 364 if (next - p) { 365 handle = malloc(next - p + 1); 366 strncpy(handle, p, next - p); 367 handle[next - p] = '\0'; /* just in case. */ 368 } 369 if (*next == '\0') 370 p = next; 371 else 372 p = next + 1; 373 } 374 /* parse optional create flag to see if we should create shm seg. */ 375 if (*p && strcasestr(p, "create")) { 376 create = 1; 377 p += strlen("create"); 378 } 379 if (*p != '\0') 380 die("shmem: unexpected trailing chars\n"); 381 if (handle == NULL) { 382 handle = malloc(strlen(default_handle) + 1); 383 strcpy(handle, default_handle); 384 } 385 if (verbose) { 386 pr_info("shmem: phys_addr = %llx", phys_addr); 387 pr_info("shmem: size = %llx", size); 388 pr_info("shmem: handle = %s", handle); 389 pr_info("shmem: create = %d", create); 390 } 391 392 si->phys_addr = phys_addr; 393 si->size = size; 394 si->handle = handle; 395 si->create = create; 396 pci_shmem__register_mem(si); /* ownership of si, etc. passed on. */ 397 return 0; 398 } 399 400 static const struct option options[] = { 401 OPT_GROUP("Basic options:"), 402 OPT_STRING('\0', "name", &guest_name, "guest name", 403 "A name for the guest"), 404 OPT_INTEGER('c', "cpus", &nrcpus, "Number of CPUs"), 405 OPT_U64('m', "mem", &ram_size, "Virtual machine memory size in MiB."), 406 OPT_CALLBACK('\0', "shmem", NULL, 407 "[pci:]<addr>:<size>[:handle=<handle>][:create]", 408 "Share host shmem with guest via pci device", 409 shmem_parser), 410 OPT_CALLBACK('d', "disk", NULL, "image or rootfs_dir", "Disk image or rootfs directory", img_name_parser), 411 OPT_BOOLEAN('\0', "balloon", &balloon, "Enable virtio balloon"), 412 OPT_BOOLEAN('\0', "vnc", &vnc, "Enable VNC framebuffer"), 413 OPT_BOOLEAN('\0', "sdl", &sdl, "Enable SDL framebuffer"), 414 OPT_BOOLEAN('\0', "rng", &virtio_rng, "Enable virtio Random Number Generator"), 415 OPT_CALLBACK('\0', "9p", NULL, "dir_to_share,tag_name", 416 "Enable virtio 9p to share files between host and guest", virtio_9p_rootdir_parser), 417 OPT_STRING('\0', "console", &console, "serial or virtio", 418 "Console to use"), 419 OPT_STRING('\0', "dev", &dev, "device_file", "KVM device file"), 420 OPT_CALLBACK('\0', "tty", NULL, "tty id", 421 "Remap guest TTY into a pty on the host", 422 tty_parser), 423 424 OPT_GROUP("Kernel options:"), 425 OPT_STRING('k', "kernel", &kernel_filename, "kernel", 426 "Kernel to boot in virtual machine"), 427 OPT_STRING('i', "initrd", &initrd_filename, "initrd", 428 "Initial RAM disk image"), 429 OPT_STRING('p', "params", &kernel_cmdline, "params", 430 "Kernel command line arguments"), 431 432 OPT_GROUP("Networking options:"), 433 OPT_CALLBACK_DEFAULT('n', "network", NULL, "network params", 434 "Create a new guest NIC", 435 netdev_parser, NULL), 436 OPT_BOOLEAN('\0', "no-dhcp", &no_dhcp, "Disable kernel DHCP in rootfs mode"), 437 438 OPT_GROUP("BIOS options:"), 439 OPT_INTEGER('\0', "vidmode", &vidmode, 440 "Video mode"), 441 442 OPT_GROUP("Debug options:"), 443 OPT_BOOLEAN('\0', "debug", &do_debug_print, 444 "Enable debug messages"), 445 OPT_BOOLEAN('\0', "debug-single-step", &single_step, 446 "Enable single stepping"), 447 OPT_BOOLEAN('\0', "debug-ioport", &ioport_debug, 448 "Enable ioport debugging"), 449 OPT_INTEGER('\0', "debug-iodelay", &debug_iodelay, 450 "Delay IO by millisecond"), 451 OPT_END() 452 }; 453 454 /* 455 * Serialize debug printout so that the output of multiple vcpus does not 456 * get mixed up: 457 */ 458 static int printout_done; 459 460 static void handle_sigusr1(int sig) 461 { 462 struct kvm_cpu *cpu = current_kvm_cpu; 463 int fd = kvm_cpu__get_debug_fd(); 464 465 if (!cpu) 466 return; 467 468 dprintf(fd, "\n #\n # vCPU #%ld's dump:\n #\n", cpu->cpu_id); 469 kvm_cpu__show_registers(cpu); 470 kvm_cpu__show_code(cpu); 471 kvm_cpu__show_page_tables(cpu); 472 fflush(stdout); 473 printout_done = 1; 474 mb(); 475 } 476 477 /* Pause/resume the guest using SIGUSR2 */ 478 static int is_paused; 479 480 static void handle_pause(int fd, u32 type, u32 len, u8 *msg) 481 { 482 if (type == KVM_IPC_RESUME && is_paused) 483 kvm__continue(); 484 else if (type == KVM_IPC_PAUSE && !is_paused) 485 kvm__pause(); 486 else 487 return; 488 489 is_paused = !is_paused; 490 pr_info("Guest %s\n", is_paused ? "paused" : "resumed"); 491 } 492 493 static void handle_debug(int fd, u32 type, u32 len, u8 *msg) 494 { 495 int i; 496 497 for (i = 0; i < nrcpus; i++) { 498 struct kvm_cpu *cpu = kvm_cpus[i]; 499 500 if (!cpu) 501 continue; 502 503 printout_done = 0; 504 505 kvm_cpu__set_debug_fd(fd); 506 pthread_kill(cpu->thread, SIGUSR1); 507 /* 508 * Wait for the vCPU to dump state before signalling 509 * the next thread. Since this is debug code it does 510 * not matter that we are burning CPU time a bit: 511 */ 512 while (!printout_done) 513 mb(); 514 } 515 516 close(fd); 517 518 serial8250__inject_sysrq(kvm); 519 } 520 521 static void handle_sigalrm(int sig) 522 { 523 serial8250__inject_interrupt(kvm); 524 virtio_console__inject_interrupt(kvm); 525 } 526 527 static void handle_stop(int fd, u32 type, u32 len, u8 *msg) 528 { 529 kvm_cpu__reboot(); 530 } 531 532 static void *kvm_cpu_thread(void *arg) 533 { 534 current_kvm_cpu = arg; 535 536 if (kvm_cpu__start(current_kvm_cpu)) 537 goto panic_kvm; 538 539 kvm_cpu__delete(current_kvm_cpu); 540 541 return (void *) (intptr_t) 0; 542 543 panic_kvm: 544 fprintf(stderr, "KVM exit reason: %u (\"%s\")\n", 545 current_kvm_cpu->kvm_run->exit_reason, 546 kvm_exit_reasons[current_kvm_cpu->kvm_run->exit_reason]); 547 if (current_kvm_cpu->kvm_run->exit_reason == KVM_EXIT_UNKNOWN) 548 fprintf(stderr, "KVM exit code: 0x%Lu\n", 549 current_kvm_cpu->kvm_run->hw.hardware_exit_reason); 550 551 kvm_cpu__set_debug_fd(STDOUT_FILENO); 552 kvm_cpu__show_registers(current_kvm_cpu); 553 kvm_cpu__show_code(current_kvm_cpu); 554 kvm_cpu__show_page_tables(current_kvm_cpu); 555 556 kvm_cpu__delete(current_kvm_cpu); 557 558 return (void *) (intptr_t) 1; 559 } 560 561 static char kernel[PATH_MAX]; 562 563 static const char *host_kernels[] = { 564 "/boot/vmlinuz", 565 "/boot/bzImage", 566 NULL 567 }; 568 569 static const char *default_kernels[] = { 570 "./bzImage", 571 "../../arch/" BUILD_ARCH "/boot/bzImage", 572 NULL 573 }; 574 575 static const char *default_vmlinux[] = { 576 "../../../vmlinux", 577 "../../vmlinux", 578 NULL 579 }; 580 581 static void kernel_usage_with_options(void) 582 { 583 const char **k; 584 struct utsname uts; 585 586 fprintf(stderr, "Fatal: could not find default kernel image in:\n"); 587 k = &default_kernels[0]; 588 while (*k) { 589 fprintf(stderr, "\t%s\n", *k); 590 k++; 591 } 592 593 if (uname(&uts) < 0) 594 return; 595 596 k = &host_kernels[0]; 597 while (*k) { 598 if (snprintf(kernel, PATH_MAX, "%s-%s", *k, uts.release) < 0) 599 return; 600 fprintf(stderr, "\t%s\n", kernel); 601 k++; 602 } 603 fprintf(stderr, "\nPlease see 'kvm run --help' for more options.\n\n"); 604 } 605 606 static u64 host_ram_size(void) 607 { 608 long page_size; 609 long nr_pages; 610 611 nr_pages = sysconf(_SC_PHYS_PAGES); 612 if (nr_pages < 0) { 613 pr_warning("sysconf(_SC_PHYS_PAGES) failed"); 614 return 0; 615 } 616 617 page_size = sysconf(_SC_PAGE_SIZE); 618 if (page_size < 0) { 619 pr_warning("sysconf(_SC_PAGE_SIZE) failed"); 620 return 0; 621 } 622 623 return (nr_pages * page_size) >> MB_SHIFT; 624 } 625 626 /* 627 * If user didn't specify how much memory it wants to allocate for the guest, 628 * avoid filling the whole host RAM. 629 */ 630 #define RAM_SIZE_RATIO 0.8 631 632 static u64 get_ram_size(int nr_cpus) 633 { 634 u64 available; 635 u64 ram_size; 636 637 ram_size = 64 * (nr_cpus + 3); 638 639 available = host_ram_size() * RAM_SIZE_RATIO; 640 if (!available) 641 available = MIN_RAM_SIZE_MB; 642 643 if (ram_size > available) 644 ram_size = available; 645 646 return ram_size; 647 } 648 649 static const char *find_kernel(void) 650 { 651 const char **k; 652 struct stat st; 653 struct utsname uts; 654 655 k = &default_kernels[0]; 656 while (*k) { 657 if (stat(*k, &st) < 0 || !S_ISREG(st.st_mode)) { 658 k++; 659 continue; 660 } 661 strncpy(kernel, *k, PATH_MAX); 662 return kernel; 663 } 664 665 if (uname(&uts) < 0) 666 return NULL; 667 668 k = &host_kernels[0]; 669 while (*k) { 670 if (snprintf(kernel, PATH_MAX, "%s-%s", *k, uts.release) < 0) 671 return NULL; 672 673 if (stat(kernel, &st) < 0 || !S_ISREG(st.st_mode)) { 674 k++; 675 continue; 676 } 677 return kernel; 678 679 } 680 return NULL; 681 } 682 683 static const char *find_vmlinux(void) 684 { 685 const char **vmlinux; 686 687 vmlinux = &default_vmlinux[0]; 688 while (*vmlinux) { 689 struct stat st; 690 691 if (stat(*vmlinux, &st) < 0 || !S_ISREG(st.st_mode)) { 692 vmlinux++; 693 continue; 694 } 695 return *vmlinux; 696 } 697 return NULL; 698 } 699 700 void kvm_run_help(void) 701 { 702 usage_with_options(run_usage, options); 703 } 704 705 int kvm_cmd_run(int argc, const char **argv, const char *prefix) 706 { 707 static char real_cmdline[2048], default_name[20]; 708 struct framebuffer *fb = NULL; 709 unsigned int nr_online_cpus; 710 int exit_code = 0; 711 int max_cpus, recommended_cpus; 712 int i; 713 void *ret; 714 715 signal(SIGALRM, handle_sigalrm); 716 kvm_ipc__register_handler(KVM_IPC_DEBUG, handle_debug); 717 signal(SIGUSR1, handle_sigusr1); 718 kvm_ipc__register_handler(KVM_IPC_PAUSE, handle_pause); 719 kvm_ipc__register_handler(KVM_IPC_RESUME, handle_pause); 720 kvm_ipc__register_handler(KVM_IPC_STOP, handle_stop); 721 722 nr_online_cpus = sysconf(_SC_NPROCESSORS_ONLN); 723 724 while (argc != 0) { 725 argc = parse_options(argc, argv, options, run_usage, 726 PARSE_OPT_STOP_AT_NON_OPTION); 727 if (argc != 0) { 728 if (kernel_filename) { 729 fprintf(stderr, "Cannot handle parameter: " 730 "%s\n", argv[0]); 731 usage_with_options(run_usage, options); 732 return EINVAL; 733 } 734 /* first unhandled parameter is treated as a kernel 735 image 736 */ 737 kernel_filename = argv[0]; 738 argv++; 739 argc--; 740 } 741 742 } 743 744 if (!kernel_filename) 745 kernel_filename = find_kernel(); 746 747 if (!kernel_filename) { 748 kernel_usage_with_options(); 749 return EINVAL; 750 } 751 752 vmlinux_filename = find_vmlinux(); 753 754 if (nrcpus == 0) 755 nrcpus = nr_online_cpus; 756 else if (nrcpus < 1 || nrcpus > KVM_NR_CPUS) 757 die("Number of CPUs %d is out of [1;%d] range", nrcpus, KVM_NR_CPUS); 758 759 if (!ram_size) 760 ram_size = get_ram_size(nrcpus); 761 762 if (ram_size < MIN_RAM_SIZE_MB) 763 die("Not enough memory specified: %lluMB (min %lluMB)", ram_size, MIN_RAM_SIZE_MB); 764 765 if (ram_size > host_ram_size()) 766 pr_warning("Guest memory size %lluMB exceeds host physical RAM size %lluMB", ram_size, host_ram_size()); 767 768 ram_size <<= MB_SHIFT; 769 770 if (!dev) 771 dev = DEFAULT_KVM_DEV; 772 773 if (!console) 774 console = DEFAULT_CONSOLE; 775 776 if (!strncmp(console, "virtio", 6)) 777 active_console = CONSOLE_VIRTIO; 778 else 779 active_console = CONSOLE_8250; 780 781 if (!host_ip) 782 host_ip = DEFAULT_HOST_ADDR; 783 784 if (!guest_ip) 785 guest_ip = DEFAULT_GUEST_ADDR; 786 787 if (!guest_mac) 788 guest_mac = DEFAULT_GUEST_MAC; 789 790 if (!host_mac) 791 host_mac = DEFAULT_HOST_MAC; 792 793 if (!script) 794 script = DEFAULT_SCRIPT; 795 796 symbol__init(vmlinux_filename); 797 798 term_init(); 799 800 if (!guest_name) { 801 sprintf(default_name, "guest-%u", getpid()); 802 guest_name = default_name; 803 } 804 805 kvm = kvm__init(dev, ram_size, guest_name); 806 807 irq__init(kvm); 808 809 kvm->single_step = single_step; 810 811 ioeventfd__init(); 812 813 max_cpus = kvm__max_cpus(kvm); 814 recommended_cpus = kvm__recommended_cpus(kvm); 815 816 if (nrcpus > max_cpus) { 817 printf(" # Limit the number of CPUs to %d\n", max_cpus); 818 kvm->nrcpus = max_cpus; 819 } else if (nrcpus > recommended_cpus) { 820 printf(" # Warning: The maximum recommended amount of VCPUs" 821 " is %d\n", recommended_cpus); 822 } 823 824 kvm->nrcpus = nrcpus; 825 826 /* 827 * vidmode should be either specified 828 * either set by default 829 */ 830 if (vnc || sdl) { 831 if (vidmode == -1) 832 vidmode = 0x312; 833 } else 834 vidmode = 0; 835 836 memset(real_cmdline, 0, sizeof(real_cmdline)); 837 strcpy(real_cmdline, "noapic noacpi pci=conf1 reboot=k panic=1 i8042.direct=1 " 838 "i8042.dumbkbd=1 i8042.nopnp=1"); 839 if (vnc || sdl) { 840 strcat(real_cmdline, " video=vesafb console=tty0"); 841 } else 842 strcat(real_cmdline, " console=ttyS0 earlyprintk=serial i8042.noaux=1"); 843 strcat(real_cmdline, " "); 844 if (kernel_cmdline) 845 strlcat(real_cmdline, kernel_cmdline, sizeof(real_cmdline)); 846 847 if (!using_rootfs && !image_filename[0]) { 848 char tmp[PATH_MAX]; 849 850 kvm_setup_create_new("default"); 851 kvm_setup_resolv("default"); 852 853 snprintf(tmp, PATH_MAX, "%s%s", kvm__get_dir(), "default"); 854 if (virtio_9p__register(kvm, tmp, "/dev/root") < 0) 855 die("Unable to initialize virtio 9p"); 856 if (virtio_9p__register(kvm, "/", "hostfs") < 0) 857 die("Unable to initialize virtio 9p"); 858 using_rootfs = custom_rootfs = 1; 859 } 860 861 if (using_rootfs) { 862 strcat(real_cmdline, " root=/dev/root rw rootflags=rw,trans=virtio,version=9p2000.L rootfstype=9p"); 863 if (custom_rootfs) { 864 strcat(real_cmdline, " init=/virt/init"); 865 if (!no_dhcp) 866 strcat(real_cmdline, " ip=dhcp"); 867 } 868 } else if (!strstr(real_cmdline, "root=")) { 869 strlcat(real_cmdline, " root=/dev/vda rw ", sizeof(real_cmdline)); 870 } 871 872 if (image_count) { 873 kvm->nr_disks = image_count; 874 kvm->disks = disk_image__open_all(image_filename, readonly_image, image_count); 875 if (!kvm->disks) 876 die("Unable to load all disk images."); 877 878 virtio_blk__init_all(kvm); 879 } 880 881 printf(" # kvm run -k %s -m %Lu -c %d --name %s\n", kernel_filename, ram_size / 1024 / 1024, nrcpus, guest_name); 882 883 if (!kvm__load_kernel(kvm, kernel_filename, initrd_filename, 884 real_cmdline, vidmode)) 885 die("unable to load kernel %s", kernel_filename); 886 887 kvm->vmlinux = vmlinux_filename; 888 889 ioport__setup_arch(); 890 891 rtc__init(); 892 893 serial8250__init(kvm); 894 895 pci__init(); 896 897 if (active_console == CONSOLE_VIRTIO) 898 virtio_console__init(kvm); 899 900 if (virtio_rng) 901 virtio_rng__init(kvm); 902 903 if (balloon) 904 virtio_bln__init(kvm); 905 906 if (!network) 907 network = DEFAULT_NETWORK; 908 909 virtio_9p__init(kvm); 910 911 for (i = 0; i < num_net_devices; i++) { 912 net_params[i].kvm = kvm; 913 virtio_net__init(&net_params[i]); 914 } 915 916 if (num_net_devices == 0 && no_net == 0) { 917 struct virtio_net_params net_params; 918 919 net_params = (struct virtio_net_params) { 920 .guest_ip = guest_ip, 921 .host_ip = host_ip, 922 .kvm = kvm, 923 .script = script, 924 .mode = NET_MODE_USER, 925 }; 926 str_to_mac(guest_mac, net_params.guest_mac); 927 str_to_mac(host_mac, net_params.host_mac); 928 929 virtio_net__init(&net_params); 930 } 931 932 kvm__start_timer(kvm); 933 934 kvm__arch_setup_firmware(kvm); 935 936 for (i = 0; i < nrcpus; i++) { 937 kvm_cpus[i] = kvm_cpu__init(kvm, i); 938 if (!kvm_cpus[i]) 939 die("unable to initialize KVM VCPU"); 940 } 941 942 kvm__init_ram(kvm); 943 944 kbd__init(kvm); 945 946 pci_shmem__init(kvm); 947 948 if (vnc || sdl) 949 fb = vesa__init(kvm); 950 951 if (vnc) { 952 if (fb) 953 vnc__init(fb); 954 } 955 956 if (sdl) { 957 if (fb) 958 sdl__init(fb); 959 } 960 961 fb__start(); 962 963 thread_pool__init(nr_online_cpus); 964 ioeventfd__start(); 965 966 for (i = 0; i < nrcpus; i++) { 967 if (pthread_create(&kvm_cpus[i]->thread, NULL, kvm_cpu_thread, kvm_cpus[i]) != 0) 968 die("unable to create KVM VCPU thread"); 969 } 970 971 /* Only VCPU #0 is going to exit by itself when shutting down */ 972 if (pthread_join(kvm_cpus[0]->thread, &ret) != 0) 973 exit_code = 1; 974 975 for (i = 1; i < nrcpus; i++) { 976 if (kvm_cpus[i]->is_running) { 977 pthread_kill(kvm_cpus[i]->thread, SIGKVMEXIT); 978 if (pthread_join(kvm_cpus[i]->thread, &ret) != 0) 979 die("pthread_join"); 980 } 981 if (ret != NULL) 982 exit_code = 1; 983 } 984 985 compat__print_all_messages(); 986 987 fb__stop(); 988 989 virtio_blk__delete_all(kvm); 990 virtio_rng__delete_all(kvm); 991 992 disk_image__close_all(kvm->disks, image_count); 993 kvm__delete(kvm); 994 995 if (!exit_code) 996 printf("\n # KVM session ended normally.\n"); 997 998 return exit_code; 999 } 1000