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 serial8250__inject_interrupt(kvm); 526 virtio_console__inject_interrupt(kvm); 527 } 528 529 static void handle_stop(int fd, u32 type, u32 len, u8 *msg) 530 { 531 kvm_cpu__reboot(); 532 } 533 534 static void *kvm_cpu_thread(void *arg) 535 { 536 current_kvm_cpu = arg; 537 538 if (kvm_cpu__start(current_kvm_cpu)) 539 goto panic_kvm; 540 541 kvm_cpu__delete(current_kvm_cpu); 542 543 return (void *) (intptr_t) 0; 544 545 panic_kvm: 546 fprintf(stderr, "KVM exit reason: %u (\"%s\")\n", 547 current_kvm_cpu->kvm_run->exit_reason, 548 kvm_exit_reasons[current_kvm_cpu->kvm_run->exit_reason]); 549 if (current_kvm_cpu->kvm_run->exit_reason == KVM_EXIT_UNKNOWN) 550 fprintf(stderr, "KVM exit code: 0x%Lu\n", 551 current_kvm_cpu->kvm_run->hw.hardware_exit_reason); 552 553 kvm_cpu__set_debug_fd(STDOUT_FILENO); 554 kvm_cpu__show_registers(current_kvm_cpu); 555 kvm_cpu__show_code(current_kvm_cpu); 556 kvm_cpu__show_page_tables(current_kvm_cpu); 557 558 kvm_cpu__delete(current_kvm_cpu); 559 560 return (void *) (intptr_t) 1; 561 } 562 563 static char kernel[PATH_MAX]; 564 565 static const char *host_kernels[] = { 566 "/boot/vmlinuz", 567 "/boot/bzImage", 568 NULL 569 }; 570 571 static const char *default_kernels[] = { 572 "./bzImage", 573 "../../arch/" BUILD_ARCH "/boot/bzImage", 574 NULL 575 }; 576 577 static const char *default_vmlinux[] = { 578 "../../../vmlinux", 579 "../../vmlinux", 580 NULL 581 }; 582 583 static void kernel_usage_with_options(void) 584 { 585 const char **k; 586 struct utsname uts; 587 588 fprintf(stderr, "Fatal: could not find default kernel image in:\n"); 589 k = &default_kernels[0]; 590 while (*k) { 591 fprintf(stderr, "\t%s\n", *k); 592 k++; 593 } 594 595 if (uname(&uts) < 0) 596 return; 597 598 k = &host_kernels[0]; 599 while (*k) { 600 if (snprintf(kernel, PATH_MAX, "%s-%s", *k, uts.release) < 0) 601 return; 602 fprintf(stderr, "\t%s\n", kernel); 603 k++; 604 } 605 fprintf(stderr, "\nPlease see 'kvm run --help' for more options.\n\n"); 606 } 607 608 static u64 host_ram_size(void) 609 { 610 long page_size; 611 long nr_pages; 612 613 nr_pages = sysconf(_SC_PHYS_PAGES); 614 if (nr_pages < 0) { 615 pr_warning("sysconf(_SC_PHYS_PAGES) failed"); 616 return 0; 617 } 618 619 page_size = sysconf(_SC_PAGE_SIZE); 620 if (page_size < 0) { 621 pr_warning("sysconf(_SC_PAGE_SIZE) failed"); 622 return 0; 623 } 624 625 return (nr_pages * page_size) >> MB_SHIFT; 626 } 627 628 /* 629 * If user didn't specify how much memory it wants to allocate for the guest, 630 * avoid filling the whole host RAM. 631 */ 632 #define RAM_SIZE_RATIO 0.8 633 634 static u64 get_ram_size(int nr_cpus) 635 { 636 u64 available; 637 u64 ram_size; 638 639 ram_size = 64 * (nr_cpus + 3); 640 641 available = host_ram_size() * RAM_SIZE_RATIO; 642 if (!available) 643 available = MIN_RAM_SIZE_MB; 644 645 if (ram_size > available) 646 ram_size = available; 647 648 return ram_size; 649 } 650 651 static const char *find_kernel(void) 652 { 653 const char **k; 654 struct stat st; 655 struct utsname uts; 656 657 k = &default_kernels[0]; 658 while (*k) { 659 if (stat(*k, &st) < 0 || !S_ISREG(st.st_mode)) { 660 k++; 661 continue; 662 } 663 strncpy(kernel, *k, PATH_MAX); 664 return kernel; 665 } 666 667 if (uname(&uts) < 0) 668 return NULL; 669 670 k = &host_kernels[0]; 671 while (*k) { 672 if (snprintf(kernel, PATH_MAX, "%s-%s", *k, uts.release) < 0) 673 return NULL; 674 675 if (stat(kernel, &st) < 0 || !S_ISREG(st.st_mode)) { 676 k++; 677 continue; 678 } 679 return kernel; 680 681 } 682 return NULL; 683 } 684 685 static const char *find_vmlinux(void) 686 { 687 const char **vmlinux; 688 689 vmlinux = &default_vmlinux[0]; 690 while (*vmlinux) { 691 struct stat st; 692 693 if (stat(*vmlinux, &st) < 0 || !S_ISREG(st.st_mode)) { 694 vmlinux++; 695 continue; 696 } 697 return *vmlinux; 698 } 699 return NULL; 700 } 701 702 void kvm_run_help(void) 703 { 704 usage_with_options(run_usage, options); 705 } 706 707 int kvm_cmd_run(int argc, const char **argv, const char *prefix) 708 { 709 static char real_cmdline[2048], default_name[20]; 710 struct framebuffer *fb = NULL; 711 unsigned int nr_online_cpus; 712 int exit_code = 0; 713 int max_cpus, recommended_cpus; 714 int i; 715 void *ret; 716 717 signal(SIGALRM, handle_sigalrm); 718 kvm_ipc__register_handler(KVM_IPC_DEBUG, handle_debug); 719 signal(SIGUSR1, handle_sigusr1); 720 kvm_ipc__register_handler(KVM_IPC_PAUSE, handle_pause); 721 kvm_ipc__register_handler(KVM_IPC_RESUME, handle_pause); 722 kvm_ipc__register_handler(KVM_IPC_STOP, handle_stop); 723 724 nr_online_cpus = sysconf(_SC_NPROCESSORS_ONLN); 725 726 while (argc != 0) { 727 argc = parse_options(argc, argv, options, run_usage, 728 PARSE_OPT_STOP_AT_NON_OPTION); 729 if (argc != 0) { 730 if (kernel_filename) { 731 fprintf(stderr, "Cannot handle parameter: " 732 "%s\n", argv[0]); 733 usage_with_options(run_usage, options); 734 return EINVAL; 735 } 736 /* first unhandled parameter is treated as a kernel 737 image 738 */ 739 kernel_filename = argv[0]; 740 argv++; 741 argc--; 742 } 743 744 } 745 746 if (!kernel_filename) 747 kernel_filename = find_kernel(); 748 749 if (!kernel_filename) { 750 kernel_usage_with_options(); 751 return EINVAL; 752 } 753 754 vmlinux_filename = find_vmlinux(); 755 756 if (nrcpus == 0) 757 nrcpus = nr_online_cpus; 758 else if (nrcpus < 1 || nrcpus > KVM_NR_CPUS) 759 die("Number of CPUs %d is out of [1;%d] range", nrcpus, KVM_NR_CPUS); 760 761 if (!ram_size) 762 ram_size = get_ram_size(nrcpus); 763 764 if (ram_size < MIN_RAM_SIZE_MB) 765 die("Not enough memory specified: %lluMB (min %lluMB)", ram_size, MIN_RAM_SIZE_MB); 766 767 if (ram_size > host_ram_size()) 768 pr_warning("Guest memory size %lluMB exceeds host physical RAM size %lluMB", ram_size, host_ram_size()); 769 770 ram_size <<= MB_SHIFT; 771 772 if (!dev) 773 dev = DEFAULT_KVM_DEV; 774 775 if (!console) 776 console = DEFAULT_CONSOLE; 777 778 if (!strncmp(console, "virtio", 6)) 779 active_console = CONSOLE_VIRTIO; 780 else 781 active_console = CONSOLE_8250; 782 783 if (!host_ip) 784 host_ip = DEFAULT_HOST_ADDR; 785 786 if (!guest_ip) 787 guest_ip = DEFAULT_GUEST_ADDR; 788 789 if (!guest_mac) 790 guest_mac = DEFAULT_GUEST_MAC; 791 792 if (!host_mac) 793 host_mac = DEFAULT_HOST_MAC; 794 795 if (!script) 796 script = DEFAULT_SCRIPT; 797 798 symbol__init(vmlinux_filename); 799 800 term_init(); 801 802 if (!guest_name) { 803 sprintf(default_name, "guest-%u", getpid()); 804 guest_name = default_name; 805 } 806 807 kvm = kvm__init(dev, ram_size, guest_name); 808 809 irq__init(kvm); 810 811 kvm->single_step = single_step; 812 813 ioeventfd__init(); 814 815 max_cpus = kvm__max_cpus(kvm); 816 recommended_cpus = kvm__recommended_cpus(kvm); 817 818 if (nrcpus > max_cpus) { 819 printf(" # Limit the number of CPUs to %d\n", max_cpus); 820 kvm->nrcpus = max_cpus; 821 } else if (nrcpus > recommended_cpus) { 822 printf(" # Warning: The maximum recommended amount of VCPUs" 823 " is %d\n", recommended_cpus); 824 } 825 826 kvm->nrcpus = nrcpus; 827 828 /* 829 * vidmode should be either specified 830 * either set by default 831 */ 832 if (vnc || sdl) { 833 if (vidmode == -1) 834 vidmode = 0x312; 835 } else 836 vidmode = 0; 837 838 memset(real_cmdline, 0, sizeof(real_cmdline)); 839 strcpy(real_cmdline, "noapic noacpi pci=conf1 reboot=k panic=1 i8042.direct=1 " 840 "i8042.dumbkbd=1 i8042.nopnp=1"); 841 if (vnc || sdl) { 842 strcat(real_cmdline, " video=vesafb console=tty0"); 843 } else 844 strcat(real_cmdline, " console=ttyS0 earlyprintk=serial i8042.noaux=1"); 845 strcat(real_cmdline, " "); 846 if (kernel_cmdline) 847 strlcat(real_cmdline, kernel_cmdline, sizeof(real_cmdline)); 848 849 if (!using_rootfs && !image_filename[0]) { 850 char tmp[PATH_MAX]; 851 852 kvm_setup_create_new("default"); 853 kvm_setup_resolv("default"); 854 855 snprintf(tmp, PATH_MAX, "%s%s", kvm__get_dir(), "default"); 856 if (virtio_9p__register(kvm, tmp, "/dev/root") < 0) 857 die("Unable to initialize virtio 9p"); 858 if (virtio_9p__register(kvm, "/", "hostfs") < 0) 859 die("Unable to initialize virtio 9p"); 860 using_rootfs = custom_rootfs = 1; 861 } 862 863 if (using_rootfs) { 864 strcat(real_cmdline, " root=/dev/root rw rootflags=rw,trans=virtio,version=9p2000.L rootfstype=9p"); 865 if (custom_rootfs) { 866 strcat(real_cmdline, " init=/virt/init"); 867 if (!no_dhcp) 868 strcat(real_cmdline, " ip=dhcp"); 869 } 870 } else if (!strstr(real_cmdline, "root=")) { 871 strlcat(real_cmdline, " root=/dev/vda rw ", sizeof(real_cmdline)); 872 } 873 874 if (image_count) { 875 kvm->nr_disks = image_count; 876 kvm->disks = disk_image__open_all(image_filename, readonly_image, image_count); 877 if (!kvm->disks) 878 die("Unable to load all disk images."); 879 880 virtio_blk__init_all(kvm); 881 } 882 883 printf(" # kvm run -k %s -m %Lu -c %d --name %s\n", kernel_filename, ram_size / 1024 / 1024, nrcpus, guest_name); 884 885 if (!kvm__load_kernel(kvm, kernel_filename, initrd_filename, 886 real_cmdline, vidmode)) 887 die("unable to load kernel %s", kernel_filename); 888 889 kvm->vmlinux = vmlinux_filename; 890 891 ioport__setup_arch(); 892 893 rtc__init(); 894 895 serial8250__init(kvm); 896 897 pci__init(); 898 899 if (active_console == CONSOLE_VIRTIO) 900 virtio_console__init(kvm); 901 902 if (virtio_rng) 903 virtio_rng__init(kvm); 904 905 if (balloon) 906 virtio_bln__init(kvm); 907 908 if (!network) 909 network = DEFAULT_NETWORK; 910 911 virtio_9p__init(kvm); 912 913 for (i = 0; i < num_net_devices; i++) { 914 net_params[i].kvm = kvm; 915 virtio_net__init(&net_params[i]); 916 } 917 918 if (num_net_devices == 0 && no_net == 0) { 919 struct virtio_net_params net_params; 920 921 net_params = (struct virtio_net_params) { 922 .guest_ip = guest_ip, 923 .host_ip = host_ip, 924 .kvm = kvm, 925 .script = script, 926 .mode = NET_MODE_USER, 927 }; 928 str_to_mac(guest_mac, net_params.guest_mac); 929 str_to_mac(host_mac, net_params.host_mac); 930 931 virtio_net__init(&net_params); 932 } 933 934 kvm__start_timer(kvm); 935 936 kvm__arch_setup_firmware(kvm); 937 938 for (i = 0; i < nrcpus; i++) { 939 kvm_cpus[i] = kvm_cpu__init(kvm, i); 940 if (!kvm_cpus[i]) 941 die("unable to initialize KVM VCPU"); 942 } 943 944 kvm__init_ram(kvm); 945 946 kbd__init(kvm); 947 948 pci_shmem__init(kvm); 949 950 if (vnc || sdl) 951 fb = vesa__init(kvm); 952 953 if (vnc) { 954 if (fb) 955 vnc__init(fb); 956 } 957 958 if (sdl) { 959 if (fb) 960 sdl__init(fb); 961 } 962 963 fb__start(); 964 965 thread_pool__init(nr_online_cpus); 966 ioeventfd__start(); 967 968 for (i = 0; i < nrcpus; i++) { 969 if (pthread_create(&kvm_cpus[i]->thread, NULL, kvm_cpu_thread, kvm_cpus[i]) != 0) 970 die("unable to create KVM VCPU thread"); 971 } 972 973 /* Only VCPU #0 is going to exit by itself when shutting down */ 974 if (pthread_join(kvm_cpus[0]->thread, &ret) != 0) 975 exit_code = 1; 976 977 for (i = 1; i < nrcpus; i++) { 978 if (kvm_cpus[i]->is_running) { 979 pthread_kill(kvm_cpus[i]->thread, SIGKVMEXIT); 980 if (pthread_join(kvm_cpus[i]->thread, &ret) != 0) 981 die("pthread_join"); 982 } 983 if (ret != NULL) 984 exit_code = 1; 985 } 986 987 compat__print_all_messages(); 988 989 fb__stop(); 990 991 virtio_blk__delete_all(kvm); 992 virtio_rng__delete_all(kvm); 993 994 disk_image__close_all(kvm->disks, image_count); 995 kvm__delete(kvm); 996 997 if (!exit_code) 998 printf("\n # KVM session ended normally.\n"); 999 1000 return exit_code; 1001 } 1002