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 } else if (strcmp(param, "fd") == 0) { 224 p->fd = atoi(val); 225 } 226 227 return 0; 228 } 229 230 static int netdev_parser(const struct option *opt, const char *arg, int unset) 231 { 232 struct virtio_net_params p; 233 char *buf = NULL, *cmd = NULL, *cur = NULL; 234 bool on_cmd = true; 235 236 if (arg) { 237 buf = strdup(arg); 238 if (buf == NULL) 239 die("Failed allocating new net buffer"); 240 cur = strtok(buf, ",="); 241 } 242 243 p = (struct virtio_net_params) { 244 .guest_ip = DEFAULT_GUEST_ADDR, 245 .host_ip = DEFAULT_HOST_ADDR, 246 .script = DEFAULT_SCRIPT, 247 .mode = NET_MODE_TAP, 248 }; 249 250 str_to_mac(DEFAULT_GUEST_MAC, p.guest_mac); 251 p.guest_mac[5] += num_net_devices; 252 253 while (cur) { 254 if (on_cmd) { 255 cmd = cur; 256 } else { 257 if (set_net_param(&p, cmd, cur) < 0) 258 goto done; 259 } 260 on_cmd = !on_cmd; 261 262 cur = strtok(NULL, ",="); 263 }; 264 265 num_net_devices++; 266 267 net_params = realloc(net_params, num_net_devices * sizeof(*net_params)); 268 if (net_params == NULL) 269 die("Failed adding new network device"); 270 271 net_params[num_net_devices - 1] = p; 272 273 done: 274 free(buf); 275 return 0; 276 } 277 278 static int shmem_parser(const struct option *opt, const char *arg, int unset) 279 { 280 const u64 default_size = SHMEM_DEFAULT_SIZE; 281 const u64 default_phys_addr = SHMEM_DEFAULT_ADDR; 282 const char *default_handle = SHMEM_DEFAULT_HANDLE; 283 struct shmem_info *si = malloc(sizeof(struct shmem_info)); 284 u64 phys_addr; 285 u64 size; 286 char *handle = NULL; 287 int create = 0; 288 const char *p = arg; 289 char *next; 290 int base = 10; 291 int verbose = 0; 292 293 const int skip_pci = strlen("pci:"); 294 if (verbose) 295 pr_info("shmem_parser(%p,%s,%d)", opt, arg, unset); 296 /* parse out optional addr family */ 297 if (strcasestr(p, "pci:")) { 298 p += skip_pci; 299 } else if (strcasestr(p, "mem:")) { 300 die("I can't add to E820 map yet.\n"); 301 } 302 /* parse out physical addr */ 303 base = 10; 304 if (strcasestr(p, "0x")) 305 base = 16; 306 phys_addr = strtoll(p, &next, base); 307 if (next == p && phys_addr == 0) { 308 pr_info("shmem: no physical addr specified, using default."); 309 phys_addr = default_phys_addr; 310 } 311 if (*next != ':' && *next != '\0') 312 die("shmem: unexpected chars after phys addr.\n"); 313 if (*next == '\0') 314 p = next; 315 else 316 p = next + 1; 317 /* parse out size */ 318 base = 10; 319 if (strcasestr(p, "0x")) 320 base = 16; 321 size = strtoll(p, &next, base); 322 if (next == p && size == 0) { 323 pr_info("shmem: no size specified, using default."); 324 size = default_size; 325 } 326 /* look for [KMGkmg][Bb]* uses base 2. */ 327 int skip_B = 0; 328 if (strspn(next, "KMGkmg")) { /* might have a prefix */ 329 if (*(next + 1) == 'B' || *(next + 1) == 'b') 330 skip_B = 1; 331 switch (*next) { 332 case 'K': 333 case 'k': 334 size = size << KB_SHIFT; 335 break; 336 case 'M': 337 case 'm': 338 size = size << MB_SHIFT; 339 break; 340 case 'G': 341 case 'g': 342 size = size << GB_SHIFT; 343 break; 344 default: 345 die("shmem: bug in detecting size prefix."); 346 break; 347 } 348 next += 1 + skip_B; 349 } 350 if (*next != ':' && *next != '\0') { 351 die("shmem: unexpected chars after phys size. <%c><%c>\n", 352 *next, *p); 353 } 354 if (*next == '\0') 355 p = next; 356 else 357 p = next + 1; 358 /* parse out optional shmem handle */ 359 const int skip_handle = strlen("handle="); 360 next = strcasestr(p, "handle="); 361 if (*p && next) { 362 if (p != next) 363 die("unexpected chars before handle\n"); 364 p += skip_handle; 365 next = strchrnul(p, ':'); 366 if (next - p) { 367 handle = malloc(next - p + 1); 368 strncpy(handle, p, next - p); 369 handle[next - p] = '\0'; /* just in case. */ 370 } 371 if (*next == '\0') 372 p = next; 373 else 374 p = next + 1; 375 } 376 /* parse optional create flag to see if we should create shm seg. */ 377 if (*p && strcasestr(p, "create")) { 378 create = 1; 379 p += strlen("create"); 380 } 381 if (*p != '\0') 382 die("shmem: unexpected trailing chars\n"); 383 if (handle == NULL) { 384 handle = malloc(strlen(default_handle) + 1); 385 strcpy(handle, default_handle); 386 } 387 if (verbose) { 388 pr_info("shmem: phys_addr = %llx", phys_addr); 389 pr_info("shmem: size = %llx", size); 390 pr_info("shmem: handle = %s", handle); 391 pr_info("shmem: create = %d", create); 392 } 393 394 si->phys_addr = phys_addr; 395 si->size = size; 396 si->handle = handle; 397 si->create = create; 398 pci_shmem__register_mem(si); /* ownership of si, etc. passed on. */ 399 return 0; 400 } 401 402 static const struct option options[] = { 403 OPT_GROUP("Basic options:"), 404 OPT_STRING('\0', "name", &guest_name, "guest name", 405 "A name for the guest"), 406 OPT_INTEGER('c', "cpus", &nrcpus, "Number of CPUs"), 407 OPT_U64('m', "mem", &ram_size, "Virtual machine memory size in MiB."), 408 OPT_CALLBACK('\0', "shmem", NULL, 409 "[pci:]<addr>:<size>[:handle=<handle>][:create]", 410 "Share host shmem with guest via pci device", 411 shmem_parser), 412 OPT_CALLBACK('d', "disk", NULL, "image or rootfs_dir", "Disk image or rootfs directory", img_name_parser), 413 OPT_BOOLEAN('\0', "balloon", &balloon, "Enable virtio balloon"), 414 OPT_BOOLEAN('\0', "vnc", &vnc, "Enable VNC framebuffer"), 415 OPT_BOOLEAN('\0', "sdl", &sdl, "Enable SDL framebuffer"), 416 OPT_BOOLEAN('\0', "rng", &virtio_rng, "Enable virtio Random Number Generator"), 417 OPT_CALLBACK('\0', "9p", NULL, "dir_to_share,tag_name", 418 "Enable virtio 9p to share files between host and guest", virtio_9p_rootdir_parser), 419 OPT_STRING('\0', "console", &console, "serial or virtio", 420 "Console to use"), 421 OPT_STRING('\0', "dev", &dev, "device_file", "KVM device file"), 422 OPT_CALLBACK('\0', "tty", NULL, "tty id", 423 "Remap guest TTY into a pty on the host", 424 tty_parser), 425 426 OPT_GROUP("Kernel options:"), 427 OPT_STRING('k', "kernel", &kernel_filename, "kernel", 428 "Kernel to boot in virtual machine"), 429 OPT_STRING('i', "initrd", &initrd_filename, "initrd", 430 "Initial RAM disk image"), 431 OPT_STRING('p', "params", &kernel_cmdline, "params", 432 "Kernel command line arguments"), 433 434 OPT_GROUP("Networking options:"), 435 OPT_CALLBACK_DEFAULT('n', "network", NULL, "network params", 436 "Create a new guest NIC", 437 netdev_parser, NULL), 438 OPT_BOOLEAN('\0', "no-dhcp", &no_dhcp, "Disable kernel DHCP in rootfs mode"), 439 440 OPT_GROUP("BIOS options:"), 441 OPT_INTEGER('\0', "vidmode", &vidmode, 442 "Video mode"), 443 444 OPT_GROUP("Debug options:"), 445 OPT_BOOLEAN('\0', "debug", &do_debug_print, 446 "Enable debug messages"), 447 OPT_BOOLEAN('\0', "debug-single-step", &single_step, 448 "Enable single stepping"), 449 OPT_BOOLEAN('\0', "debug-ioport", &ioport_debug, 450 "Enable ioport debugging"), 451 OPT_INTEGER('\0', "debug-iodelay", &debug_iodelay, 452 "Delay IO by millisecond"), 453 OPT_END() 454 }; 455 456 /* 457 * Serialize debug printout so that the output of multiple vcpus does not 458 * get mixed up: 459 */ 460 static int printout_done; 461 462 static void handle_sigusr1(int sig) 463 { 464 struct kvm_cpu *cpu = current_kvm_cpu; 465 int fd = kvm_cpu__get_debug_fd(); 466 467 if (!cpu) 468 return; 469 470 dprintf(fd, "\n #\n # vCPU #%ld's dump:\n #\n", cpu->cpu_id); 471 kvm_cpu__show_registers(cpu); 472 kvm_cpu__show_code(cpu); 473 kvm_cpu__show_page_tables(cpu); 474 fflush(stdout); 475 printout_done = 1; 476 mb(); 477 } 478 479 /* Pause/resume the guest using SIGUSR2 */ 480 static int is_paused; 481 482 static void handle_pause(int fd, u32 type, u32 len, u8 *msg) 483 { 484 if (type == KVM_IPC_RESUME && is_paused) 485 kvm__continue(); 486 else if (type == KVM_IPC_PAUSE && !is_paused) 487 kvm__pause(); 488 else 489 return; 490 491 is_paused = !is_paused; 492 pr_info("Guest %s\n", is_paused ? "paused" : "resumed"); 493 } 494 495 static void handle_debug(int fd, u32 type, u32 len, u8 *msg) 496 { 497 int i; 498 499 for (i = 0; i < nrcpus; i++) { 500 struct kvm_cpu *cpu = kvm_cpus[i]; 501 502 if (!cpu) 503 continue; 504 505 printout_done = 0; 506 507 kvm_cpu__set_debug_fd(fd); 508 pthread_kill(cpu->thread, SIGUSR1); 509 /* 510 * Wait for the vCPU to dump state before signalling 511 * the next thread. Since this is debug code it does 512 * not matter that we are burning CPU time a bit: 513 */ 514 while (!printout_done) 515 mb(); 516 } 517 518 close(fd); 519 520 serial8250__inject_sysrq(kvm); 521 } 522 523 static void handle_sigalrm(int sig) 524 { 525 kvm__arch_periodic_poll(kvm); 526 } 527 528 static void handle_stop(int fd, u32 type, u32 len, u8 *msg) 529 { 530 kvm_cpu__reboot(); 531 } 532 533 static void *kvm_cpu_thread(void *arg) 534 { 535 current_kvm_cpu = arg; 536 537 if (kvm_cpu__start(current_kvm_cpu)) 538 goto panic_kvm; 539 540 kvm_cpu__delete(current_kvm_cpu); 541 542 return (void *) (intptr_t) 0; 543 544 panic_kvm: 545 fprintf(stderr, "KVM exit reason: %u (\"%s\")\n", 546 current_kvm_cpu->kvm_run->exit_reason, 547 kvm_exit_reasons[current_kvm_cpu->kvm_run->exit_reason]); 548 if (current_kvm_cpu->kvm_run->exit_reason == KVM_EXIT_UNKNOWN) 549 fprintf(stderr, "KVM exit code: 0x%Lu\n", 550 current_kvm_cpu->kvm_run->hw.hardware_exit_reason); 551 552 kvm_cpu__set_debug_fd(STDOUT_FILENO); 553 kvm_cpu__show_registers(current_kvm_cpu); 554 kvm_cpu__show_code(current_kvm_cpu); 555 kvm_cpu__show_page_tables(current_kvm_cpu); 556 557 kvm_cpu__delete(current_kvm_cpu); 558 559 return (void *) (intptr_t) 1; 560 } 561 562 static char kernel[PATH_MAX]; 563 564 static const char *host_kernels[] = { 565 "/boot/vmlinuz", 566 "/boot/bzImage", 567 NULL 568 }; 569 570 static const char *default_kernels[] = { 571 "./bzImage", 572 "../../arch/" BUILD_ARCH "/boot/bzImage", 573 NULL 574 }; 575 576 static const char *default_vmlinux[] = { 577 "../../../vmlinux", 578 "../../vmlinux", 579 NULL 580 }; 581 582 static void kernel_usage_with_options(void) 583 { 584 const char **k; 585 struct utsname uts; 586 587 fprintf(stderr, "Fatal: could not find default kernel image in:\n"); 588 k = &default_kernels[0]; 589 while (*k) { 590 fprintf(stderr, "\t%s\n", *k); 591 k++; 592 } 593 594 if (uname(&uts) < 0) 595 return; 596 597 k = &host_kernels[0]; 598 while (*k) { 599 if (snprintf(kernel, PATH_MAX, "%s-%s", *k, uts.release) < 0) 600 return; 601 fprintf(stderr, "\t%s\n", kernel); 602 k++; 603 } 604 fprintf(stderr, "\nPlease see 'kvm run --help' for more options.\n\n"); 605 } 606 607 static u64 host_ram_size(void) 608 { 609 long page_size; 610 long nr_pages; 611 612 nr_pages = sysconf(_SC_PHYS_PAGES); 613 if (nr_pages < 0) { 614 pr_warning("sysconf(_SC_PHYS_PAGES) failed"); 615 return 0; 616 } 617 618 page_size = sysconf(_SC_PAGE_SIZE); 619 if (page_size < 0) { 620 pr_warning("sysconf(_SC_PAGE_SIZE) failed"); 621 return 0; 622 } 623 624 return (nr_pages * page_size) >> MB_SHIFT; 625 } 626 627 /* 628 * If user didn't specify how much memory it wants to allocate for the guest, 629 * avoid filling the whole host RAM. 630 */ 631 #define RAM_SIZE_RATIO 0.8 632 633 static u64 get_ram_size(int nr_cpus) 634 { 635 u64 available; 636 u64 ram_size; 637 638 ram_size = 64 * (nr_cpus + 3); 639 640 available = host_ram_size() * RAM_SIZE_RATIO; 641 if (!available) 642 available = MIN_RAM_SIZE_MB; 643 644 if (ram_size > available) 645 ram_size = available; 646 647 return ram_size; 648 } 649 650 static const char *find_kernel(void) 651 { 652 const char **k; 653 struct stat st; 654 struct utsname uts; 655 656 k = &default_kernels[0]; 657 while (*k) { 658 if (stat(*k, &st) < 0 || !S_ISREG(st.st_mode)) { 659 k++; 660 continue; 661 } 662 strncpy(kernel, *k, PATH_MAX); 663 return kernel; 664 } 665 666 if (uname(&uts) < 0) 667 return NULL; 668 669 k = &host_kernels[0]; 670 while (*k) { 671 if (snprintf(kernel, PATH_MAX, "%s-%s", *k, uts.release) < 0) 672 return NULL; 673 674 if (stat(kernel, &st) < 0 || !S_ISREG(st.st_mode)) { 675 k++; 676 continue; 677 } 678 return kernel; 679 680 } 681 return NULL; 682 } 683 684 static const char *find_vmlinux(void) 685 { 686 const char **vmlinux; 687 688 vmlinux = &default_vmlinux[0]; 689 while (*vmlinux) { 690 struct stat st; 691 692 if (stat(*vmlinux, &st) < 0 || !S_ISREG(st.st_mode)) { 693 vmlinux++; 694 continue; 695 } 696 return *vmlinux; 697 } 698 return NULL; 699 } 700 701 void kvm_run_help(void) 702 { 703 usage_with_options(run_usage, options); 704 } 705 706 int kvm_cmd_run(int argc, const char **argv, const char *prefix) 707 { 708 static char real_cmdline[2048], default_name[20]; 709 struct framebuffer *fb = NULL; 710 unsigned int nr_online_cpus; 711 int exit_code = 0; 712 int max_cpus, recommended_cpus; 713 int i; 714 void *ret; 715 716 signal(SIGALRM, handle_sigalrm); 717 kvm_ipc__register_handler(KVM_IPC_DEBUG, handle_debug); 718 signal(SIGUSR1, handle_sigusr1); 719 kvm_ipc__register_handler(KVM_IPC_PAUSE, handle_pause); 720 kvm_ipc__register_handler(KVM_IPC_RESUME, handle_pause); 721 kvm_ipc__register_handler(KVM_IPC_STOP, handle_stop); 722 723 nr_online_cpus = sysconf(_SC_NPROCESSORS_ONLN); 724 725 while (argc != 0) { 726 argc = parse_options(argc, argv, options, run_usage, 727 PARSE_OPT_STOP_AT_NON_OPTION); 728 if (argc != 0) { 729 if (kernel_filename) { 730 fprintf(stderr, "Cannot handle parameter: " 731 "%s\n", argv[0]); 732 usage_with_options(run_usage, options); 733 return EINVAL; 734 } 735 /* first unhandled parameter is treated as a kernel 736 image 737 */ 738 kernel_filename = argv[0]; 739 argv++; 740 argc--; 741 } 742 743 } 744 745 if (!kernel_filename) 746 kernel_filename = find_kernel(); 747 748 if (!kernel_filename) { 749 kernel_usage_with_options(); 750 return EINVAL; 751 } 752 753 vmlinux_filename = find_vmlinux(); 754 755 if (nrcpus == 0) 756 nrcpus = nr_online_cpus; 757 else if (nrcpus < 1 || nrcpus > KVM_NR_CPUS) 758 die("Number of CPUs %d is out of [1;%d] range", nrcpus, KVM_NR_CPUS); 759 760 if (!ram_size) 761 ram_size = get_ram_size(nrcpus); 762 763 if (ram_size < MIN_RAM_SIZE_MB) 764 die("Not enough memory specified: %lluMB (min %lluMB)", ram_size, MIN_RAM_SIZE_MB); 765 766 if (ram_size > host_ram_size()) 767 pr_warning("Guest memory size %lluMB exceeds host physical RAM size %lluMB", ram_size, host_ram_size()); 768 769 ram_size <<= MB_SHIFT; 770 771 if (!dev) 772 dev = DEFAULT_KVM_DEV; 773 774 if (!console) 775 console = DEFAULT_CONSOLE; 776 777 if (!strncmp(console, "virtio", 6)) 778 active_console = CONSOLE_VIRTIO; 779 else 780 active_console = CONSOLE_8250; 781 782 if (!host_ip) 783 host_ip = DEFAULT_HOST_ADDR; 784 785 if (!guest_ip) 786 guest_ip = DEFAULT_GUEST_ADDR; 787 788 if (!guest_mac) 789 guest_mac = DEFAULT_GUEST_MAC; 790 791 if (!host_mac) 792 host_mac = DEFAULT_HOST_MAC; 793 794 if (!script) 795 script = DEFAULT_SCRIPT; 796 797 symbol__init(vmlinux_filename); 798 799 term_init(); 800 801 if (!guest_name) { 802 sprintf(default_name, "guest-%u", getpid()); 803 guest_name = default_name; 804 } 805 806 kvm = kvm__init(dev, ram_size, guest_name); 807 808 irq__init(kvm); 809 810 kvm->single_step = single_step; 811 812 ioeventfd__init(); 813 814 max_cpus = kvm__max_cpus(kvm); 815 recommended_cpus = kvm__recommended_cpus(kvm); 816 817 if (nrcpus > max_cpus) { 818 printf(" # Limit the number of CPUs to %d\n", max_cpus); 819 nrcpus = max_cpus; 820 } else if (nrcpus > recommended_cpus) { 821 printf(" # Warning: The maximum recommended amount of VCPUs" 822 " is %d\n", recommended_cpus); 823 } 824 825 kvm->nrcpus = nrcpus; 826 827 /* 828 * vidmode should be either specified 829 * either set by default 830 */ 831 if (vnc || sdl) { 832 if (vidmode == -1) 833 vidmode = 0x312; 834 } else 835 vidmode = 0; 836 837 memset(real_cmdline, 0, sizeof(real_cmdline)); 838 strcpy(real_cmdline, "noapic noacpi pci=conf1 reboot=k panic=1 i8042.direct=1 " 839 "i8042.dumbkbd=1 i8042.nopnp=1"); 840 if (vnc || sdl) { 841 strcat(real_cmdline, " video=vesafb console=tty0"); 842 } else 843 strcat(real_cmdline, " console=ttyS0 earlyprintk=serial i8042.noaux=1"); 844 strcat(real_cmdline, " "); 845 if (kernel_cmdline) 846 strlcat(real_cmdline, kernel_cmdline, sizeof(real_cmdline)); 847 848 if (!using_rootfs && !image_filename[0]) { 849 char tmp[PATH_MAX]; 850 851 kvm_setup_create_new("default"); 852 kvm_setup_resolv("default"); 853 854 snprintf(tmp, PATH_MAX, "%s%s", kvm__get_dir(), "default"); 855 if (virtio_9p__register(kvm, tmp, "/dev/root") < 0) 856 die("Unable to initialize virtio 9p"); 857 if (virtio_9p__register(kvm, "/", "hostfs") < 0) 858 die("Unable to initialize virtio 9p"); 859 using_rootfs = custom_rootfs = 1; 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"); 866 if (!no_dhcp) 867 strcat(real_cmdline, " ip=dhcp"); 868 } 869 } else if (!strstr(real_cmdline, "root=")) { 870 strlcat(real_cmdline, " root=/dev/vda rw ", sizeof(real_cmdline)); 871 } 872 873 if (image_count) { 874 kvm->nr_disks = image_count; 875 kvm->disks = disk_image__open_all(image_filename, readonly_image, image_count); 876 if (!kvm->disks) 877 die("Unable to load all disk images."); 878 879 virtio_blk__init_all(kvm); 880 } 881 882 printf(" # kvm run -k %s -m %Lu -c %d --name %s\n", kernel_filename, ram_size / 1024 / 1024, nrcpus, guest_name); 883 884 if (!kvm__load_kernel(kvm, kernel_filename, initrd_filename, 885 real_cmdline, vidmode)) 886 die("unable to load kernel %s", kernel_filename); 887 888 kvm->vmlinux = vmlinux_filename; 889 890 ioport__setup_arch(); 891 892 rtc__init(); 893 894 serial8250__init(kvm); 895 896 pci__init(); 897 898 if (active_console == CONSOLE_VIRTIO) 899 virtio_console__init(kvm); 900 901 if (virtio_rng) 902 virtio_rng__init(kvm); 903 904 if (balloon) 905 virtio_bln__init(kvm); 906 907 if (!network) 908 network = DEFAULT_NETWORK; 909 910 virtio_9p__init(kvm); 911 912 for (i = 0; i < num_net_devices; i++) { 913 net_params[i].kvm = kvm; 914 virtio_net__init(&net_params[i]); 915 } 916 917 if (num_net_devices == 0 && no_net == 0) { 918 struct virtio_net_params net_params; 919 920 net_params = (struct virtio_net_params) { 921 .guest_ip = guest_ip, 922 .host_ip = host_ip, 923 .kvm = kvm, 924 .script = script, 925 .mode = NET_MODE_USER, 926 }; 927 str_to_mac(guest_mac, net_params.guest_mac); 928 str_to_mac(host_mac, net_params.host_mac); 929 930 virtio_net__init(&net_params); 931 } 932 933 kvm__start_timer(kvm); 934 935 kvm__arch_setup_firmware(kvm); 936 937 for (i = 0; i < nrcpus; i++) { 938 kvm_cpus[i] = kvm_cpu__init(kvm, i); 939 if (!kvm_cpus[i]) 940 die("unable to initialize KVM VCPU"); 941 } 942 943 kvm__init_ram(kvm); 944 945 #ifdef CONFIG_X86 946 kbd__init(kvm); 947 #endif 948 949 pci_shmem__init(kvm); 950 951 if (vnc || sdl) 952 fb = vesa__init(kvm); 953 954 if (vnc) { 955 if (fb) 956 vnc__init(fb); 957 } 958 959 if (sdl) { 960 if (fb) 961 sdl__init(fb); 962 } 963 964 fb__start(); 965 966 thread_pool__init(nr_online_cpus); 967 ioeventfd__start(); 968 969 for (i = 0; i < nrcpus; i++) { 970 if (pthread_create(&kvm_cpus[i]->thread, NULL, kvm_cpu_thread, kvm_cpus[i]) != 0) 971 die("unable to create KVM VCPU thread"); 972 } 973 974 /* Only VCPU #0 is going to exit by itself when shutting down */ 975 if (pthread_join(kvm_cpus[0]->thread, &ret) != 0) 976 exit_code = 1; 977 978 for (i = 1; i < nrcpus; i++) { 979 if (kvm_cpus[i]->is_running) { 980 pthread_kill(kvm_cpus[i]->thread, SIGKVMEXIT); 981 if (pthread_join(kvm_cpus[i]->thread, &ret) != 0) 982 die("pthread_join"); 983 } 984 if (ret != NULL) 985 exit_code = 1; 986 } 987 988 compat__print_all_messages(); 989 990 fb__stop(); 991 992 virtio_blk__delete_all(kvm); 993 virtio_rng__delete_all(kvm); 994 995 disk_image__close_all(kvm->disks, image_count); 996 kvm__delete(kvm); 997 998 if (!exit_code) 999 printf("\n # KVM session ended normally.\n"); 1000 1001 return exit_code; 1002 } 1003