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/strbuf.h" 25 #include "kvm/vesa.h" 26 #include "kvm/irq.h" 27 #include "kvm/kvm.h" 28 #include "kvm/pci.h" 29 #include "kvm/rtc.h" 30 #include "kvm/sdl.h" 31 #include "kvm/vnc.h" 32 #include "kvm/guest_compat.h" 33 #include "kvm/pci-shmem.h" 34 #include "kvm/kvm-ipc.h" 35 #include "kvm/builtin-debug.h" 36 37 #include <linux/types.h> 38 39 #include <sys/utsname.h> 40 #include <sys/types.h> 41 #include <sys/stat.h> 42 #include <termios.h> 43 #include <signal.h> 44 #include <stdlib.h> 45 #include <string.h> 46 #include <unistd.h> 47 #include <ctype.h> 48 #include <stdio.h> 49 50 #define DEFAULT_KVM_DEV "/dev/kvm" 51 #define DEFAULT_CONSOLE "serial" 52 #define DEFAULT_NETWORK "user" 53 #define DEFAULT_HOST_ADDR "192.168.33.1" 54 #define DEFAULT_GUEST_ADDR "192.168.33.15" 55 #define DEFAULT_GUEST_MAC "02:15:15:15:15:15" 56 #define DEFAULT_HOST_MAC "02:01:01:01:01:01" 57 #define DEFAULT_SCRIPT "none" 58 const char *DEFAULT_SANDBOX_FILENAME = "guest/sandbox.sh"; 59 60 #define MB_SHIFT (20) 61 #define KB_SHIFT (10) 62 #define GB_SHIFT (30) 63 #define MIN_RAM_SIZE_MB (64ULL) 64 #define MIN_RAM_SIZE_BYTE (MIN_RAM_SIZE_MB << MB_SHIFT) 65 66 struct kvm *kvm; 67 struct kvm_cpu **kvm_cpus; 68 __thread struct kvm_cpu *current_kvm_cpu; 69 70 static u64 ram_size; 71 static u8 image_count; 72 static u8 num_net_devices; 73 static bool virtio_rng; 74 static const char *kernel_cmdline; 75 static const char *kernel_filename; 76 static const char *vmlinux_filename; 77 static const char *initrd_filename; 78 static const char *image_filename[MAX_DISK_IMAGES]; 79 static const char *console; 80 static const char *dev; 81 static const char *network; 82 static const char *host_ip; 83 static const char *guest_ip; 84 static const char *guest_mac; 85 static const char *host_mac; 86 static const char *script; 87 static const char *guest_name; 88 static const char *sandbox; 89 static const char *hugetlbfs_path; 90 static const char *custom_rootfs_name = "default"; 91 static struct virtio_net_params *net_params; 92 static bool single_step; 93 static bool readonly_image[MAX_DISK_IMAGES]; 94 static bool vnc; 95 static bool sdl; 96 static bool balloon; 97 static bool using_rootfs; 98 static bool custom_rootfs; 99 static bool no_net; 100 static bool no_dhcp; 101 extern bool ioport_debug; 102 static int kvm_run_wrapper; 103 extern int active_console; 104 extern int debug_iodelay; 105 106 bool do_debug_print = false; 107 108 static int nrcpus; 109 static int vidmode = -1; 110 111 static const char * const run_usage[] = { 112 "lkvm run [<options>] [<kernel image>]", 113 NULL 114 }; 115 116 enum { 117 KVM_RUN_SANDBOX, 118 }; 119 120 void kvm_run_set_wrapper_sandbox(void) 121 { 122 kvm_run_wrapper = KVM_RUN_SANDBOX; 123 } 124 125 static int img_name_parser(const struct option *opt, const char *arg, int unset) 126 { 127 char *sep; 128 struct stat st; 129 char path[PATH_MAX]; 130 131 if (stat(arg, &st) == 0 && 132 S_ISDIR(st.st_mode)) { 133 char tmp[PATH_MAX]; 134 135 if (using_rootfs) 136 die("Please use only one rootfs directory atmost"); 137 138 if (realpath(arg, tmp) == 0 || 139 virtio_9p__register(kvm, tmp, "/dev/root") < 0) 140 die("Unable to initialize virtio 9p"); 141 using_rootfs = 1; 142 return 0; 143 } 144 145 snprintf(path, PATH_MAX, "%s%s", kvm__get_dir(), arg); 146 147 if (stat(path, &st) == 0 && 148 S_ISDIR(st.st_mode)) { 149 char tmp[PATH_MAX]; 150 151 if (using_rootfs) 152 die("Please use only one rootfs directory atmost"); 153 154 if (realpath(path, tmp) == 0 || 155 virtio_9p__register(kvm, tmp, "/dev/root") < 0) 156 die("Unable to initialize virtio 9p"); 157 if (virtio_9p__register(kvm, "/", "hostfs") < 0) 158 die("Unable to initialize virtio 9p"); 159 kvm_setup_resolv(arg); 160 using_rootfs = custom_rootfs = 1; 161 custom_rootfs_name = arg; 162 return 0; 163 } 164 165 if (image_count >= MAX_DISK_IMAGES) 166 die("Currently only 4 images are supported"); 167 168 image_filename[image_count] = arg; 169 sep = strstr(arg, ","); 170 if (sep) { 171 if (strcmp(sep + 1, "ro") == 0) 172 readonly_image[image_count] = 1; 173 *sep = 0; 174 } 175 176 image_count++; 177 178 return 0; 179 } 180 181 static int virtio_9p_rootdir_parser(const struct option *opt, const char *arg, int unset) 182 { 183 char *tag_name; 184 char tmp[PATH_MAX]; 185 186 /* 187 * 9p dir can be of the form dirname,tag_name or 188 * just dirname. In the later case we use the 189 * default tag name 190 */ 191 tag_name = strstr(arg, ","); 192 if (tag_name) { 193 *tag_name = '\0'; 194 tag_name++; 195 } 196 if (realpath(arg, tmp)) { 197 if (virtio_9p__register(kvm, tmp, tag_name) < 0) 198 die("Unable to initialize virtio 9p"); 199 } else 200 die("Failed resolving 9p path"); 201 return 0; 202 } 203 204 static int tty_parser(const struct option *opt, const char *arg, int unset) 205 { 206 int tty = atoi(arg); 207 208 term_set_tty(tty); 209 210 return 0; 211 } 212 213 static inline void str_to_mac(const char *str, char *mac) 214 { 215 sscanf(str, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", 216 mac, mac+1, mac+2, mac+3, mac+4, mac+5); 217 } 218 static int set_net_param(struct virtio_net_params *p, const char *param, 219 const char *val) 220 { 221 if (strcmp(param, "guest_mac") == 0) { 222 str_to_mac(val, p->guest_mac); 223 } else if (strcmp(param, "mode") == 0) { 224 if (!strncmp(val, "user", 4)) { 225 int i; 226 227 for (i = 0; i < num_net_devices; i++) 228 if (net_params[i].mode == NET_MODE_USER) 229 die("Only one usermode network device allowed at a time"); 230 p->mode = NET_MODE_USER; 231 } else if (!strncmp(val, "tap", 3)) { 232 p->mode = NET_MODE_TAP; 233 } else if (!strncmp(val, "none", 4)) { 234 no_net = 1; 235 return -1; 236 } else 237 die("Unkown network mode %s, please use user, tap or none", network); 238 } else if (strcmp(param, "script") == 0) { 239 p->script = strdup(val); 240 } else if (strcmp(param, "guest_ip") == 0) { 241 p->guest_ip = strdup(val); 242 } else if (strcmp(param, "host_ip") == 0) { 243 p->host_ip = strdup(val); 244 } else if (strcmp(param, "vhost") == 0) { 245 p->vhost = atoi(val); 246 } else if (strcmp(param, "fd") == 0) { 247 p->fd = atoi(val); 248 } 249 250 return 0; 251 } 252 253 static int netdev_parser(const struct option *opt, const char *arg, int unset) 254 { 255 struct virtio_net_params p; 256 char *buf = NULL, *cmd = NULL, *cur = NULL; 257 bool on_cmd = true; 258 259 if (arg) { 260 buf = strdup(arg); 261 if (buf == NULL) 262 die("Failed allocating new net buffer"); 263 cur = strtok(buf, ",="); 264 } 265 266 p = (struct virtio_net_params) { 267 .guest_ip = DEFAULT_GUEST_ADDR, 268 .host_ip = DEFAULT_HOST_ADDR, 269 .script = DEFAULT_SCRIPT, 270 .mode = NET_MODE_TAP, 271 }; 272 273 str_to_mac(DEFAULT_GUEST_MAC, p.guest_mac); 274 p.guest_mac[5] += num_net_devices; 275 276 while (cur) { 277 if (on_cmd) { 278 cmd = cur; 279 } else { 280 if (set_net_param(&p, cmd, cur) < 0) 281 goto done; 282 } 283 on_cmd = !on_cmd; 284 285 cur = strtok(NULL, ",="); 286 }; 287 288 num_net_devices++; 289 290 net_params = realloc(net_params, num_net_devices * sizeof(*net_params)); 291 if (net_params == NULL) 292 die("Failed adding new network device"); 293 294 net_params[num_net_devices - 1] = p; 295 296 done: 297 free(buf); 298 return 0; 299 } 300 301 static int shmem_parser(const struct option *opt, const char *arg, int unset) 302 { 303 const u64 default_size = SHMEM_DEFAULT_SIZE; 304 const u64 default_phys_addr = SHMEM_DEFAULT_ADDR; 305 const char *default_handle = SHMEM_DEFAULT_HANDLE; 306 struct shmem_info *si = malloc(sizeof(struct shmem_info)); 307 u64 phys_addr; 308 u64 size; 309 char *handle = NULL; 310 int create = 0; 311 const char *p = arg; 312 char *next; 313 int base = 10; 314 int verbose = 0; 315 316 const int skip_pci = strlen("pci:"); 317 if (verbose) 318 pr_info("shmem_parser(%p,%s,%d)", opt, arg, unset); 319 /* parse out optional addr family */ 320 if (strcasestr(p, "pci:")) { 321 p += skip_pci; 322 } else if (strcasestr(p, "mem:")) { 323 die("I can't add to E820 map yet.\n"); 324 } 325 /* parse out physical addr */ 326 base = 10; 327 if (strcasestr(p, "0x")) 328 base = 16; 329 phys_addr = strtoll(p, &next, base); 330 if (next == p && phys_addr == 0) { 331 pr_info("shmem: no physical addr specified, using default."); 332 phys_addr = default_phys_addr; 333 } 334 if (*next != ':' && *next != '\0') 335 die("shmem: unexpected chars after phys addr.\n"); 336 if (*next == '\0') 337 p = next; 338 else 339 p = next + 1; 340 /* parse out size */ 341 base = 10; 342 if (strcasestr(p, "0x")) 343 base = 16; 344 size = strtoll(p, &next, base); 345 if (next == p && size == 0) { 346 pr_info("shmem: no size specified, using default."); 347 size = default_size; 348 } 349 /* look for [KMGkmg][Bb]* uses base 2. */ 350 int skip_B = 0; 351 if (strspn(next, "KMGkmg")) { /* might have a prefix */ 352 if (*(next + 1) == 'B' || *(next + 1) == 'b') 353 skip_B = 1; 354 switch (*next) { 355 case 'K': 356 case 'k': 357 size = size << KB_SHIFT; 358 break; 359 case 'M': 360 case 'm': 361 size = size << MB_SHIFT; 362 break; 363 case 'G': 364 case 'g': 365 size = size << GB_SHIFT; 366 break; 367 default: 368 die("shmem: bug in detecting size prefix."); 369 break; 370 } 371 next += 1 + skip_B; 372 } 373 if (*next != ':' && *next != '\0') { 374 die("shmem: unexpected chars after phys size. <%c><%c>\n", 375 *next, *p); 376 } 377 if (*next == '\0') 378 p = next; 379 else 380 p = next + 1; 381 /* parse out optional shmem handle */ 382 const int skip_handle = strlen("handle="); 383 next = strcasestr(p, "handle="); 384 if (*p && next) { 385 if (p != next) 386 die("unexpected chars before handle\n"); 387 p += skip_handle; 388 next = strchrnul(p, ':'); 389 if (next - p) { 390 handle = malloc(next - p + 1); 391 strncpy(handle, p, next - p); 392 handle[next - p] = '\0'; /* just in case. */ 393 } 394 if (*next == '\0') 395 p = next; 396 else 397 p = next + 1; 398 } 399 /* parse optional create flag to see if we should create shm seg. */ 400 if (*p && strcasestr(p, "create")) { 401 create = 1; 402 p += strlen("create"); 403 } 404 if (*p != '\0') 405 die("shmem: unexpected trailing chars\n"); 406 if (handle == NULL) { 407 handle = malloc(strlen(default_handle) + 1); 408 strcpy(handle, default_handle); 409 } 410 if (verbose) { 411 pr_info("shmem: phys_addr = %llx", phys_addr); 412 pr_info("shmem: size = %llx", size); 413 pr_info("shmem: handle = %s", handle); 414 pr_info("shmem: create = %d", create); 415 } 416 417 si->phys_addr = phys_addr; 418 si->size = size; 419 si->handle = handle; 420 si->create = create; 421 pci_shmem__register_mem(si); /* ownership of si, etc. passed on. */ 422 return 0; 423 } 424 425 static const struct option options[] = { 426 OPT_GROUP("Basic options:"), 427 OPT_STRING('\0', "name", &guest_name, "guest name", 428 "A name for the guest"), 429 OPT_INTEGER('c', "cpus", &nrcpus, "Number of CPUs"), 430 OPT_U64('m', "mem", &ram_size, "Virtual machine memory size in MiB."), 431 OPT_CALLBACK('\0', "shmem", NULL, 432 "[pci:]<addr>:<size>[:handle=<handle>][:create]", 433 "Share host shmem with guest via pci device", 434 shmem_parser), 435 OPT_CALLBACK('d', "disk", NULL, "image or rootfs_dir", "Disk image or rootfs directory", img_name_parser), 436 OPT_BOOLEAN('\0', "balloon", &balloon, "Enable virtio balloon"), 437 OPT_BOOLEAN('\0', "vnc", &vnc, "Enable VNC framebuffer"), 438 OPT_BOOLEAN('\0', "sdl", &sdl, "Enable SDL framebuffer"), 439 OPT_BOOLEAN('\0', "rng", &virtio_rng, "Enable virtio Random Number Generator"), 440 OPT_CALLBACK('\0', "9p", NULL, "dir_to_share,tag_name", 441 "Enable virtio 9p to share files between host and guest", virtio_9p_rootdir_parser), 442 OPT_STRING('\0', "console", &console, "serial, virtio or hv", 443 "Console to use"), 444 OPT_STRING('\0', "dev", &dev, "device_file", "KVM device file"), 445 OPT_CALLBACK('\0', "tty", NULL, "tty id", 446 "Remap guest TTY into a pty on the host", 447 tty_parser), 448 OPT_STRING('\0', "sandbox", &sandbox, "script", 449 "Run this script when booting into custom rootfs"), 450 OPT_STRING('\0', "hugetlbfs", &hugetlbfs_path, "path", "Hugetlbfs path"), 451 452 OPT_GROUP("Kernel options:"), 453 OPT_STRING('k', "kernel", &kernel_filename, "kernel", 454 "Kernel to boot in virtual machine"), 455 OPT_STRING('i', "initrd", &initrd_filename, "initrd", 456 "Initial RAM disk image"), 457 OPT_STRING('p', "params", &kernel_cmdline, "params", 458 "Kernel command line arguments"), 459 460 OPT_GROUP("Networking options:"), 461 OPT_CALLBACK_DEFAULT('n', "network", NULL, "network params", 462 "Create a new guest NIC", 463 netdev_parser, NULL), 464 OPT_BOOLEAN('\0', "no-dhcp", &no_dhcp, "Disable kernel DHCP in rootfs mode"), 465 466 OPT_GROUP("BIOS options:"), 467 OPT_INTEGER('\0', "vidmode", &vidmode, 468 "Video mode"), 469 470 OPT_GROUP("Debug options:"), 471 OPT_BOOLEAN('\0', "debug", &do_debug_print, 472 "Enable debug messages"), 473 OPT_BOOLEAN('\0', "debug-single-step", &single_step, 474 "Enable single stepping"), 475 OPT_BOOLEAN('\0', "debug-ioport", &ioport_debug, 476 "Enable ioport debugging"), 477 OPT_INTEGER('\0', "debug-iodelay", &debug_iodelay, 478 "Delay IO by millisecond"), 479 OPT_END() 480 }; 481 482 /* 483 * Serialize debug printout so that the output of multiple vcpus does not 484 * get mixed up: 485 */ 486 static int printout_done; 487 488 static void handle_sigusr1(int sig) 489 { 490 struct kvm_cpu *cpu = current_kvm_cpu; 491 int fd = kvm_cpu__get_debug_fd(); 492 493 if (!cpu || cpu->needs_nmi) 494 return; 495 496 dprintf(fd, "\n #\n # vCPU #%ld's dump:\n #\n", cpu->cpu_id); 497 kvm_cpu__show_registers(cpu); 498 kvm_cpu__show_code(cpu); 499 kvm_cpu__show_page_tables(cpu); 500 fflush(stdout); 501 printout_done = 1; 502 mb(); 503 } 504 505 /* Pause/resume the guest using SIGUSR2 */ 506 static int is_paused; 507 508 static void handle_pause(int fd, u32 type, u32 len, u8 *msg) 509 { 510 if (type == KVM_IPC_RESUME && is_paused) 511 kvm__continue(); 512 else if (type == KVM_IPC_PAUSE && !is_paused) 513 kvm__pause(); 514 else 515 return; 516 517 is_paused = !is_paused; 518 pr_info("Guest %s\n", is_paused ? "paused" : "resumed"); 519 } 520 521 static void handle_debug(int fd, u32 type, u32 len, u8 *msg) 522 { 523 int i; 524 struct debug_cmd_params *params = (void *)msg; 525 u32 dbg_type = params->dbg_type; 526 u32 vcpu = params->cpu; 527 528 if (dbg_type & KVM_DEBUG_CMD_TYPE_NMI) { 529 if ((int)vcpu >= kvm->nrcpus) 530 return; 531 532 kvm_cpus[vcpu]->needs_nmi = 1; 533 pthread_kill(kvm_cpus[vcpu]->thread, SIGUSR1); 534 } 535 536 if (!(dbg_type & KVM_DEBUG_CMD_TYPE_DUMP)) 537 return; 538 539 for (i = 0; i < nrcpus; i++) { 540 struct kvm_cpu *cpu = kvm_cpus[i]; 541 542 if (!cpu) 543 continue; 544 545 printout_done = 0; 546 547 kvm_cpu__set_debug_fd(fd); 548 pthread_kill(cpu->thread, SIGUSR1); 549 /* 550 * Wait for the vCPU to dump state before signalling 551 * the next thread. Since this is debug code it does 552 * not matter that we are burning CPU time a bit: 553 */ 554 while (!printout_done) 555 mb(); 556 } 557 558 close(fd); 559 560 serial8250__inject_sysrq(kvm); 561 } 562 563 static void handle_sigalrm(int sig) 564 { 565 kvm__arch_periodic_poll(kvm); 566 } 567 568 static void handle_stop(int fd, u32 type, u32 len, u8 *msg) 569 { 570 kvm_cpu__reboot(); 571 } 572 573 static void *kvm_cpu_thread(void *arg) 574 { 575 current_kvm_cpu = arg; 576 577 if (kvm_cpu__start(current_kvm_cpu)) 578 goto panic_kvm; 579 580 kvm_cpu__delete(current_kvm_cpu); 581 582 return (void *) (intptr_t) 0; 583 584 panic_kvm: 585 fprintf(stderr, "KVM exit reason: %u (\"%s\")\n", 586 current_kvm_cpu->kvm_run->exit_reason, 587 kvm_exit_reasons[current_kvm_cpu->kvm_run->exit_reason]); 588 if (current_kvm_cpu->kvm_run->exit_reason == KVM_EXIT_UNKNOWN) 589 fprintf(stderr, "KVM exit code: 0x%Lu\n", 590 current_kvm_cpu->kvm_run->hw.hardware_exit_reason); 591 592 kvm_cpu__set_debug_fd(STDOUT_FILENO); 593 kvm_cpu__show_registers(current_kvm_cpu); 594 kvm_cpu__show_code(current_kvm_cpu); 595 kvm_cpu__show_page_tables(current_kvm_cpu); 596 597 kvm_cpu__delete(current_kvm_cpu); 598 599 return (void *) (intptr_t) 1; 600 } 601 602 static char kernel[PATH_MAX]; 603 604 static const char *host_kernels[] = { 605 "/boot/vmlinuz", 606 "/boot/bzImage", 607 NULL 608 }; 609 610 static const char *default_kernels[] = { 611 "./bzImage", 612 "../../arch/" BUILD_ARCH "/boot/bzImage", 613 NULL 614 }; 615 616 static const char *default_vmlinux[] = { 617 "../../../vmlinux", 618 "../../vmlinux", 619 NULL 620 }; 621 622 static void kernel_usage_with_options(void) 623 { 624 const char **k; 625 struct utsname uts; 626 627 fprintf(stderr, "Fatal: could not find default kernel image in:\n"); 628 k = &default_kernels[0]; 629 while (*k) { 630 fprintf(stderr, "\t%s\n", *k); 631 k++; 632 } 633 634 if (uname(&uts) < 0) 635 return; 636 637 k = &host_kernels[0]; 638 while (*k) { 639 if (snprintf(kernel, PATH_MAX, "%s-%s", *k, uts.release) < 0) 640 return; 641 fprintf(stderr, "\t%s\n", kernel); 642 k++; 643 } 644 fprintf(stderr, "\nPlease see '%s run --help' for more options.\n\n", 645 KVM_BINARY_NAME); 646 } 647 648 static u64 host_ram_size(void) 649 { 650 long page_size; 651 long nr_pages; 652 653 nr_pages = sysconf(_SC_PHYS_PAGES); 654 if (nr_pages < 0) { 655 pr_warning("sysconf(_SC_PHYS_PAGES) failed"); 656 return 0; 657 } 658 659 page_size = sysconf(_SC_PAGE_SIZE); 660 if (page_size < 0) { 661 pr_warning("sysconf(_SC_PAGE_SIZE) failed"); 662 return 0; 663 } 664 665 return (nr_pages * page_size) >> MB_SHIFT; 666 } 667 668 /* 669 * If user didn't specify how much memory it wants to allocate for the guest, 670 * avoid filling the whole host RAM. 671 */ 672 #define RAM_SIZE_RATIO 0.8 673 674 static u64 get_ram_size(int nr_cpus) 675 { 676 u64 available; 677 u64 ram_size; 678 679 ram_size = 64 * (nr_cpus + 3); 680 681 available = host_ram_size() * RAM_SIZE_RATIO; 682 if (!available) 683 available = MIN_RAM_SIZE_MB; 684 685 if (ram_size > available) 686 ram_size = available; 687 688 return ram_size; 689 } 690 691 static const char *find_kernel(void) 692 { 693 const char **k; 694 struct stat st; 695 struct utsname uts; 696 697 k = &default_kernels[0]; 698 while (*k) { 699 if (stat(*k, &st) < 0 || !S_ISREG(st.st_mode)) { 700 k++; 701 continue; 702 } 703 strncpy(kernel, *k, PATH_MAX); 704 return kernel; 705 } 706 707 if (uname(&uts) < 0) 708 return NULL; 709 710 k = &host_kernels[0]; 711 while (*k) { 712 if (snprintf(kernel, PATH_MAX, "%s-%s", *k, uts.release) < 0) 713 return NULL; 714 715 if (stat(kernel, &st) < 0 || !S_ISREG(st.st_mode)) { 716 k++; 717 continue; 718 } 719 return kernel; 720 721 } 722 return NULL; 723 } 724 725 static const char *find_vmlinux(void) 726 { 727 const char **vmlinux; 728 729 vmlinux = &default_vmlinux[0]; 730 while (*vmlinux) { 731 struct stat st; 732 733 if (stat(*vmlinux, &st) < 0 || !S_ISREG(st.st_mode)) { 734 vmlinux++; 735 continue; 736 } 737 return *vmlinux; 738 } 739 return NULL; 740 } 741 742 void kvm_run_help(void) 743 { 744 usage_with_options(run_usage, options); 745 } 746 747 static int kvm_custom_stage2(void) 748 { 749 char tmp[PATH_MAX], dst[PATH_MAX], *src; 750 const char *rootfs = custom_rootfs_name; 751 int r; 752 753 src = realpath("guest/init_stage2", NULL); 754 if (src == NULL) 755 return -ENOMEM; 756 757 snprintf(tmp, PATH_MAX, "%s%s/virt/init_stage2", kvm__get_dir(), rootfs); 758 remove(tmp); 759 760 snprintf(dst, PATH_MAX, "/host/%s", src); 761 r = symlink(dst, tmp); 762 free(src); 763 764 return r; 765 } 766 767 static int kvm_run_set_sandbox(void) 768 { 769 const char *guestfs_name = custom_rootfs_name; 770 char path[PATH_MAX], script[PATH_MAX], *tmp; 771 772 snprintf(path, PATH_MAX, "%s%s/virt/sandbox.sh", kvm__get_dir(), guestfs_name); 773 774 remove(path); 775 776 if (sandbox == NULL) 777 return 0; 778 779 tmp = realpath(sandbox, NULL); 780 if (tmp == NULL) 781 return -ENOMEM; 782 783 snprintf(script, PATH_MAX, "/host/%s", tmp); 784 free(tmp); 785 786 return symlink(script, path); 787 } 788 789 static void kvm_write_sandbox_cmd_exactly(int fd, const char *arg) 790 { 791 const char *single_quote; 792 793 if (!*arg) { /* zero length string */ 794 if (write(fd, "''", 2) <= 0) 795 die("Failed writing sandbox script"); 796 return; 797 } 798 799 while (*arg) { 800 single_quote = strchrnul(arg, '\''); 801 802 /* write non-single-quote string as #('string') */ 803 if (arg != single_quote) { 804 if (write(fd, "'", 1) <= 0 || 805 write(fd, arg, single_quote - arg) <= 0 || 806 write(fd, "'", 1) <= 0) 807 die("Failed writing sandbox script"); 808 } 809 810 /* write single quote as #("'") */ 811 if (*single_quote) { 812 if (write(fd, "\"'\"", 3) <= 0) 813 die("Failed writing sandbox script"); 814 } else 815 break; 816 817 arg = single_quote + 1; 818 } 819 } 820 821 static void kvm_run_write_sandbox_cmd(const char **argv, int argc) 822 { 823 const char script_hdr[] = "#! /bin/bash\n\n"; 824 int fd; 825 826 remove(sandbox); 827 828 fd = open(sandbox, O_RDWR | O_CREAT, 0777); 829 if (fd < 0) 830 die("Failed creating sandbox script"); 831 832 if (write(fd, script_hdr, sizeof(script_hdr) - 1) <= 0) 833 die("Failed writing sandbox script"); 834 835 while (argc) { 836 kvm_write_sandbox_cmd_exactly(fd, argv[0]); 837 if (argc - 1) 838 if (write(fd, " ", 1) <= 0) 839 die("Failed writing sandbox script"); 840 argv++; 841 argc--; 842 } 843 if (write(fd, "\n", 1) <= 0) 844 die("Failed writing sandbox script"); 845 846 close(fd); 847 } 848 849 int kvm_cmd_run(int argc, const char **argv, const char *prefix) 850 { 851 static char real_cmdline[2048], default_name[20]; 852 struct framebuffer *fb = NULL; 853 unsigned int nr_online_cpus; 854 int exit_code = 0; 855 int max_cpus, recommended_cpus; 856 int i; 857 void *ret; 858 859 signal(SIGALRM, handle_sigalrm); 860 kvm_ipc__register_handler(KVM_IPC_DEBUG, handle_debug); 861 signal(SIGUSR1, handle_sigusr1); 862 kvm_ipc__register_handler(KVM_IPC_PAUSE, handle_pause); 863 kvm_ipc__register_handler(KVM_IPC_RESUME, handle_pause); 864 kvm_ipc__register_handler(KVM_IPC_STOP, handle_stop); 865 866 nr_online_cpus = sysconf(_SC_NPROCESSORS_ONLN); 867 868 while (argc != 0) { 869 argc = parse_options(argc, argv, options, run_usage, 870 PARSE_OPT_STOP_AT_NON_OPTION | 871 PARSE_OPT_KEEP_DASHDASH); 872 if (argc != 0) { 873 /* Cusrom options, should have been handled elsewhere */ 874 if (strcmp(argv[0], "--") == 0) { 875 if (kvm_run_wrapper == KVM_RUN_SANDBOX) { 876 sandbox = DEFAULT_SANDBOX_FILENAME; 877 kvm_run_write_sandbox_cmd(argv+1, argc-1); 878 break; 879 } 880 } 881 882 if (kernel_filename) { 883 fprintf(stderr, "Cannot handle parameter: " 884 "%s\n", argv[0]); 885 usage_with_options(run_usage, options); 886 return EINVAL; 887 } 888 /* first unhandled parameter is treated as a kernel 889 image 890 */ 891 kernel_filename = argv[0]; 892 argv++; 893 argc--; 894 } 895 896 } 897 898 if (!kernel_filename) 899 kernel_filename = find_kernel(); 900 901 if (!kernel_filename) { 902 kernel_usage_with_options(); 903 return EINVAL; 904 } 905 906 vmlinux_filename = find_vmlinux(); 907 908 if (nrcpus == 0) 909 nrcpus = nr_online_cpus; 910 911 if (!ram_size) 912 ram_size = get_ram_size(nrcpus); 913 914 if (ram_size < MIN_RAM_SIZE_MB) 915 die("Not enough memory specified: %lluMB (min %lluMB)", ram_size, MIN_RAM_SIZE_MB); 916 917 if (ram_size > host_ram_size()) 918 pr_warning("Guest memory size %lluMB exceeds host physical RAM size %lluMB", ram_size, host_ram_size()); 919 920 ram_size <<= MB_SHIFT; 921 922 if (!dev) 923 dev = DEFAULT_KVM_DEV; 924 925 if (!console) 926 console = DEFAULT_CONSOLE; 927 928 if (!strncmp(console, "virtio", 6)) 929 active_console = CONSOLE_VIRTIO; 930 else if (!strncmp(console, "serial", 6)) 931 active_console = CONSOLE_8250; 932 else if (!strncmp(console, "hv", 2)) 933 active_console = CONSOLE_HV; 934 else 935 pr_warning("No console!"); 936 937 if (!host_ip) 938 host_ip = DEFAULT_HOST_ADDR; 939 940 if (!guest_ip) 941 guest_ip = DEFAULT_GUEST_ADDR; 942 943 if (!guest_mac) 944 guest_mac = DEFAULT_GUEST_MAC; 945 946 if (!host_mac) 947 host_mac = DEFAULT_HOST_MAC; 948 949 if (!script) 950 script = DEFAULT_SCRIPT; 951 952 symbol__init(vmlinux_filename); 953 954 term_init(); 955 956 if (!guest_name) { 957 sprintf(default_name, "guest-%u", getpid()); 958 guest_name = default_name; 959 } 960 961 kvm = kvm__init(dev, hugetlbfs_path, ram_size, guest_name); 962 963 kvm->single_step = single_step; 964 965 ioeventfd__init(kvm); 966 967 max_cpus = kvm__max_cpus(kvm); 968 recommended_cpus = kvm__recommended_cpus(kvm); 969 970 if (nrcpus > max_cpus) { 971 printf(" # Limit the number of CPUs to %d\n", max_cpus); 972 nrcpus = max_cpus; 973 } else if (nrcpus > recommended_cpus) { 974 printf(" # Warning: The maximum recommended amount of VCPUs" 975 " is %d\n", recommended_cpus); 976 } 977 978 kvm->nrcpus = nrcpus; 979 980 /* Alloc one pointer too many, so array ends up 0-terminated */ 981 kvm_cpus = calloc(nrcpus + 1, sizeof(void *)); 982 if (!kvm_cpus) 983 die("Couldn't allocate array for %d CPUs", nrcpus); 984 985 irq__init(kvm); 986 987 pci__init(); 988 989 /* 990 * vidmode should be either specified 991 * either set by default 992 */ 993 if (vnc || sdl) { 994 if (vidmode == -1) 995 vidmode = 0x312; 996 } else 997 vidmode = 0; 998 999 memset(real_cmdline, 0, sizeof(real_cmdline)); 1000 kvm__arch_set_cmdline(real_cmdline, vnc || sdl); 1001 1002 if (strlen(real_cmdline) > 0) 1003 strcat(real_cmdline, " "); 1004 1005 if (kernel_cmdline) 1006 strlcat(real_cmdline, kernel_cmdline, sizeof(real_cmdline)); 1007 1008 if (!using_rootfs && !image_filename[0] && !initrd_filename) { 1009 char tmp[PATH_MAX]; 1010 1011 kvm_setup_create_new(custom_rootfs_name); 1012 kvm_setup_resolv(custom_rootfs_name); 1013 1014 snprintf(tmp, PATH_MAX, "%s%s", kvm__get_dir(), "default"); 1015 if (virtio_9p__register(kvm, tmp, "/dev/root") < 0) 1016 die("Unable to initialize virtio 9p"); 1017 if (virtio_9p__register(kvm, "/", "hostfs") < 0) 1018 die("Unable to initialize virtio 9p"); 1019 using_rootfs = custom_rootfs = 1; 1020 } 1021 1022 if (using_rootfs) { 1023 strcat(real_cmdline, " root=/dev/root rw rootflags=rw,trans=virtio,version=9p2000.L rootfstype=9p"); 1024 if (custom_rootfs) { 1025 kvm_run_set_sandbox(); 1026 1027 strcat(real_cmdline, " init=/virt/init"); 1028 1029 if (!no_dhcp) 1030 strcat(real_cmdline, " ip=dhcp"); 1031 if (kvm_custom_stage2()) 1032 die("Failed linking stage 2 of init."); 1033 } 1034 } else if (!strstr(real_cmdline, "root=")) { 1035 strlcat(real_cmdline, " root=/dev/vda rw ", sizeof(real_cmdline)); 1036 } 1037 1038 if (image_count) { 1039 kvm->nr_disks = image_count; 1040 kvm->disks = disk_image__open_all(image_filename, readonly_image, image_count); 1041 if (!kvm->disks) 1042 die("Unable to load all disk images."); 1043 1044 virtio_blk__init_all(kvm); 1045 } 1046 1047 printf(" # %s run -k %s -m %Lu -c %d --name %s\n", KVM_BINARY_NAME, 1048 kernel_filename, ram_size / 1024 / 1024, nrcpus, guest_name); 1049 1050 if (!kvm__load_kernel(kvm, kernel_filename, initrd_filename, 1051 real_cmdline, vidmode)) 1052 die("unable to load kernel %s", kernel_filename); 1053 1054 kvm->vmlinux = vmlinux_filename; 1055 1056 ioport__setup_arch(); 1057 1058 rtc__init(); 1059 1060 serial8250__init(kvm); 1061 1062 if (active_console == CONSOLE_VIRTIO) 1063 virtio_console__init(kvm); 1064 1065 if (virtio_rng) 1066 virtio_rng__init(kvm); 1067 1068 if (balloon) 1069 virtio_bln__init(kvm); 1070 1071 if (!network) 1072 network = DEFAULT_NETWORK; 1073 1074 virtio_9p__init(kvm); 1075 1076 for (i = 0; i < num_net_devices; i++) { 1077 net_params[i].kvm = kvm; 1078 virtio_net__init(&net_params[i]); 1079 } 1080 1081 if (num_net_devices == 0 && no_net == 0) { 1082 struct virtio_net_params net_params; 1083 1084 net_params = (struct virtio_net_params) { 1085 .guest_ip = guest_ip, 1086 .host_ip = host_ip, 1087 .kvm = kvm, 1088 .script = script, 1089 .mode = NET_MODE_USER, 1090 }; 1091 str_to_mac(guest_mac, net_params.guest_mac); 1092 str_to_mac(host_mac, net_params.host_mac); 1093 1094 virtio_net__init(&net_params); 1095 } 1096 1097 kvm__init_ram(kvm); 1098 1099 #ifdef CONFIG_X86 1100 kbd__init(kvm); 1101 #endif 1102 1103 pci_shmem__init(kvm); 1104 1105 if (vnc || sdl) 1106 fb = vesa__init(kvm); 1107 1108 if (vnc) { 1109 if (fb) 1110 vnc__init(fb); 1111 } 1112 1113 if (sdl) { 1114 if (fb) 1115 sdl__init(fb); 1116 } 1117 1118 fb__start(); 1119 1120 /* Device init all done; firmware init must 1121 * come after this (it may set up device trees etc.) 1122 */ 1123 1124 kvm__start_timer(kvm); 1125 1126 kvm__arch_setup_firmware(kvm); 1127 1128 for (i = 0; i < nrcpus; i++) { 1129 kvm_cpus[i] = kvm_cpu__init(kvm, i); 1130 if (!kvm_cpus[i]) 1131 die("unable to initialize KVM VCPU"); 1132 } 1133 1134 thread_pool__init(nr_online_cpus); 1135 ioeventfd__start(); 1136 1137 for (i = 0; i < nrcpus; i++) { 1138 if (pthread_create(&kvm_cpus[i]->thread, NULL, kvm_cpu_thread, kvm_cpus[i]) != 0) 1139 die("unable to create KVM VCPU thread"); 1140 } 1141 1142 /* Only VCPU #0 is going to exit by itself when shutting down */ 1143 if (pthread_join(kvm_cpus[0]->thread, &ret) != 0) 1144 exit_code = 1; 1145 1146 for (i = 1; i < nrcpus; i++) { 1147 if (kvm_cpus[i]->is_running) { 1148 pthread_kill(kvm_cpus[i]->thread, SIGKVMEXIT); 1149 if (pthread_join(kvm_cpus[i]->thread, &ret) != 0) 1150 die("pthread_join"); 1151 } 1152 if (ret != NULL) 1153 exit_code = 1; 1154 } 1155 1156 compat__print_all_messages(); 1157 1158 fb__stop(); 1159 1160 virtio_blk__delete_all(kvm); 1161 virtio_rng__delete_all(kvm); 1162 1163 disk_image__close_all(kvm->disks, image_count); 1164 kvm__delete(kvm); 1165 1166 if (!exit_code) 1167 printf("\n # KVM session ended normally.\n"); 1168 1169 return exit_code; 1170 } 1171