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