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 (WARN_ON(len)) 511 return; 512 513 if (type == KVM_IPC_RESUME && is_paused) { 514 kvm->vm_state = KVM_VMSTATE_RUNNING; 515 kvm__continue(); 516 } else if (type == KVM_IPC_PAUSE && !is_paused) { 517 kvm->vm_state = KVM_VMSTATE_PAUSED; 518 kvm__pause(); 519 } else { 520 WARN_ON(1); 521 return; 522 } 523 524 is_paused = !is_paused; 525 } 526 527 static void handle_vmstate(int fd, u32 type, u32 len, u8 *msg) 528 { 529 int r = 0; 530 531 if (type == KVM_IPC_VMSTATE) 532 r = write(fd, &kvm->vm_state, sizeof(kvm->vm_state)); 533 534 if (r < 0) 535 pr_warning("Failed sending VMSTATE"); 536 } 537 538 static void handle_debug(int fd, u32 type, u32 len, u8 *msg) 539 { 540 int i; 541 struct debug_cmd_params *params; 542 u32 dbg_type; 543 u32 vcpu; 544 545 if (WARN_ON(type != KVM_IPC_DEBUG || len != sizeof(*params))) 546 return; 547 548 params = (void *)msg; 549 dbg_type = params->dbg_type; 550 vcpu = params->cpu; 551 552 if (dbg_type & KVM_DEBUG_CMD_TYPE_NMI) { 553 if ((int)vcpu >= kvm->nrcpus) 554 return; 555 556 kvm_cpus[vcpu]->needs_nmi = 1; 557 pthread_kill(kvm_cpus[vcpu]->thread, SIGUSR1); 558 } 559 560 if (!(dbg_type & KVM_DEBUG_CMD_TYPE_DUMP)) 561 return; 562 563 for (i = 0; i < nrcpus; i++) { 564 struct kvm_cpu *cpu = kvm_cpus[i]; 565 566 if (!cpu) 567 continue; 568 569 printout_done = 0; 570 571 kvm_cpu__set_debug_fd(fd); 572 pthread_kill(cpu->thread, SIGUSR1); 573 /* 574 * Wait for the vCPU to dump state before signalling 575 * the next thread. Since this is debug code it does 576 * not matter that we are burning CPU time a bit: 577 */ 578 while (!printout_done) 579 mb(); 580 } 581 582 close(fd); 583 584 serial8250__inject_sysrq(kvm); 585 } 586 587 static void handle_sigalrm(int sig) 588 { 589 kvm__arch_periodic_poll(kvm); 590 } 591 592 static void handle_stop(int fd, u32 type, u32 len, u8 *msg) 593 { 594 if (WARN_ON(type != KVM_IPC_STOP || len)) 595 return; 596 597 kvm_cpu__reboot(); 598 } 599 600 static void *kvm_cpu_thread(void *arg) 601 { 602 current_kvm_cpu = arg; 603 604 if (kvm_cpu__start(current_kvm_cpu)) 605 goto panic_kvm; 606 607 kvm_cpu__delete(current_kvm_cpu); 608 609 return (void *) (intptr_t) 0; 610 611 panic_kvm: 612 fprintf(stderr, "KVM exit reason: %u (\"%s\")\n", 613 current_kvm_cpu->kvm_run->exit_reason, 614 kvm_exit_reasons[current_kvm_cpu->kvm_run->exit_reason]); 615 if (current_kvm_cpu->kvm_run->exit_reason == KVM_EXIT_UNKNOWN) 616 fprintf(stderr, "KVM exit code: 0x%Lu\n", 617 current_kvm_cpu->kvm_run->hw.hardware_exit_reason); 618 619 kvm_cpu__set_debug_fd(STDOUT_FILENO); 620 kvm_cpu__show_registers(current_kvm_cpu); 621 kvm_cpu__show_code(current_kvm_cpu); 622 kvm_cpu__show_page_tables(current_kvm_cpu); 623 624 kvm_cpu__delete(current_kvm_cpu); 625 626 return (void *) (intptr_t) 1; 627 } 628 629 static char kernel[PATH_MAX]; 630 631 static const char *host_kernels[] = { 632 "/boot/vmlinuz", 633 "/boot/bzImage", 634 NULL 635 }; 636 637 static const char *default_kernels[] = { 638 "./bzImage", 639 "../../arch/" BUILD_ARCH "/boot/bzImage", 640 NULL 641 }; 642 643 static const char *default_vmlinux[] = { 644 "../../../vmlinux", 645 "../../vmlinux", 646 NULL 647 }; 648 649 static void kernel_usage_with_options(void) 650 { 651 const char **k; 652 struct utsname uts; 653 654 fprintf(stderr, "Fatal: could not find default kernel image in:\n"); 655 k = &default_kernels[0]; 656 while (*k) { 657 fprintf(stderr, "\t%s\n", *k); 658 k++; 659 } 660 661 if (uname(&uts) < 0) 662 return; 663 664 k = &host_kernels[0]; 665 while (*k) { 666 if (snprintf(kernel, PATH_MAX, "%s-%s", *k, uts.release) < 0) 667 return; 668 fprintf(stderr, "\t%s\n", kernel); 669 k++; 670 } 671 fprintf(stderr, "\nPlease see '%s run --help' for more options.\n\n", 672 KVM_BINARY_NAME); 673 } 674 675 static u64 host_ram_size(void) 676 { 677 long page_size; 678 long nr_pages; 679 680 nr_pages = sysconf(_SC_PHYS_PAGES); 681 if (nr_pages < 0) { 682 pr_warning("sysconf(_SC_PHYS_PAGES) failed"); 683 return 0; 684 } 685 686 page_size = sysconf(_SC_PAGE_SIZE); 687 if (page_size < 0) { 688 pr_warning("sysconf(_SC_PAGE_SIZE) failed"); 689 return 0; 690 } 691 692 return (nr_pages * page_size) >> MB_SHIFT; 693 } 694 695 /* 696 * If user didn't specify how much memory it wants to allocate for the guest, 697 * avoid filling the whole host RAM. 698 */ 699 #define RAM_SIZE_RATIO 0.8 700 701 static u64 get_ram_size(int nr_cpus) 702 { 703 u64 available; 704 u64 ram_size; 705 706 ram_size = 64 * (nr_cpus + 3); 707 708 available = host_ram_size() * RAM_SIZE_RATIO; 709 if (!available) 710 available = MIN_RAM_SIZE_MB; 711 712 if (ram_size > available) 713 ram_size = available; 714 715 return ram_size; 716 } 717 718 static const char *find_kernel(void) 719 { 720 const char **k; 721 struct stat st; 722 struct utsname uts; 723 724 k = &default_kernels[0]; 725 while (*k) { 726 if (stat(*k, &st) < 0 || !S_ISREG(st.st_mode)) { 727 k++; 728 continue; 729 } 730 strncpy(kernel, *k, PATH_MAX); 731 return kernel; 732 } 733 734 if (uname(&uts) < 0) 735 return NULL; 736 737 k = &host_kernels[0]; 738 while (*k) { 739 if (snprintf(kernel, PATH_MAX, "%s-%s", *k, uts.release) < 0) 740 return NULL; 741 742 if (stat(kernel, &st) < 0 || !S_ISREG(st.st_mode)) { 743 k++; 744 continue; 745 } 746 return kernel; 747 748 } 749 return NULL; 750 } 751 752 static const char *find_vmlinux(void) 753 { 754 const char **vmlinux; 755 756 vmlinux = &default_vmlinux[0]; 757 while (*vmlinux) { 758 struct stat st; 759 760 if (stat(*vmlinux, &st) < 0 || !S_ISREG(st.st_mode)) { 761 vmlinux++; 762 continue; 763 } 764 return *vmlinux; 765 } 766 return NULL; 767 } 768 769 void kvm_run_help(void) 770 { 771 usage_with_options(run_usage, options); 772 } 773 774 static int kvm_custom_stage2(void) 775 { 776 char tmp[PATH_MAX], dst[PATH_MAX], *src; 777 const char *rootfs = custom_rootfs_name; 778 int r; 779 780 src = realpath("guest/init_stage2", NULL); 781 if (src == NULL) 782 return -ENOMEM; 783 784 snprintf(tmp, PATH_MAX, "%s%s/virt/init_stage2", kvm__get_dir(), rootfs); 785 remove(tmp); 786 787 snprintf(dst, PATH_MAX, "/host/%s", src); 788 r = symlink(dst, tmp); 789 free(src); 790 791 return r; 792 } 793 794 static int kvm_run_set_sandbox(void) 795 { 796 const char *guestfs_name = custom_rootfs_name; 797 char path[PATH_MAX], script[PATH_MAX], *tmp; 798 799 snprintf(path, PATH_MAX, "%s%s/virt/sandbox.sh", kvm__get_dir(), guestfs_name); 800 801 remove(path); 802 803 if (sandbox == NULL) 804 return 0; 805 806 tmp = realpath(sandbox, NULL); 807 if (tmp == NULL) 808 return -ENOMEM; 809 810 snprintf(script, PATH_MAX, "/host/%s", tmp); 811 free(tmp); 812 813 return symlink(script, path); 814 } 815 816 static void kvm_write_sandbox_cmd_exactly(int fd, const char *arg) 817 { 818 const char *single_quote; 819 820 if (!*arg) { /* zero length string */ 821 if (write(fd, "''", 2) <= 0) 822 die("Failed writing sandbox script"); 823 return; 824 } 825 826 while (*arg) { 827 single_quote = strchrnul(arg, '\''); 828 829 /* write non-single-quote string as #('string') */ 830 if (arg != single_quote) { 831 if (write(fd, "'", 1) <= 0 || 832 write(fd, arg, single_quote - arg) <= 0 || 833 write(fd, "'", 1) <= 0) 834 die("Failed writing sandbox script"); 835 } 836 837 /* write single quote as #("'") */ 838 if (*single_quote) { 839 if (write(fd, "\"'\"", 3) <= 0) 840 die("Failed writing sandbox script"); 841 } else 842 break; 843 844 arg = single_quote + 1; 845 } 846 } 847 848 static void kvm_run_write_sandbox_cmd(const char **argv, int argc) 849 { 850 const char script_hdr[] = "#! /bin/bash\n\n"; 851 int fd; 852 853 remove(sandbox); 854 855 fd = open(sandbox, O_RDWR | O_CREAT, 0777); 856 if (fd < 0) 857 die("Failed creating sandbox script"); 858 859 if (write(fd, script_hdr, sizeof(script_hdr) - 1) <= 0) 860 die("Failed writing sandbox script"); 861 862 while (argc) { 863 kvm_write_sandbox_cmd_exactly(fd, argv[0]); 864 if (argc - 1) 865 if (write(fd, " ", 1) <= 0) 866 die("Failed writing sandbox script"); 867 argv++; 868 argc--; 869 } 870 if (write(fd, "\n", 1) <= 0) 871 die("Failed writing sandbox script"); 872 873 close(fd); 874 } 875 876 int kvm_cmd_run(int argc, const char **argv, const char *prefix) 877 { 878 static char real_cmdline[2048], default_name[20]; 879 struct framebuffer *fb = NULL; 880 unsigned int nr_online_cpus; 881 int exit_code = 0; 882 int max_cpus, recommended_cpus; 883 int i; 884 void *ret; 885 886 signal(SIGALRM, handle_sigalrm); 887 kvm_ipc__register_handler(KVM_IPC_DEBUG, handle_debug); 888 signal(SIGUSR1, handle_sigusr1); 889 kvm_ipc__register_handler(KVM_IPC_PAUSE, handle_pause); 890 kvm_ipc__register_handler(KVM_IPC_RESUME, handle_pause); 891 kvm_ipc__register_handler(KVM_IPC_STOP, handle_stop); 892 kvm_ipc__register_handler(KVM_IPC_VMSTATE, handle_vmstate); 893 894 nr_online_cpus = sysconf(_SC_NPROCESSORS_ONLN); 895 896 while (argc != 0) { 897 argc = parse_options(argc, argv, options, run_usage, 898 PARSE_OPT_STOP_AT_NON_OPTION | 899 PARSE_OPT_KEEP_DASHDASH); 900 if (argc != 0) { 901 /* Cusrom options, should have been handled elsewhere */ 902 if (strcmp(argv[0], "--") == 0) { 903 if (kvm_run_wrapper == KVM_RUN_SANDBOX) { 904 sandbox = DEFAULT_SANDBOX_FILENAME; 905 kvm_run_write_sandbox_cmd(argv+1, argc-1); 906 break; 907 } 908 } 909 910 if (kernel_filename) { 911 fprintf(stderr, "Cannot handle parameter: " 912 "%s\n", argv[0]); 913 usage_with_options(run_usage, options); 914 return EINVAL; 915 } 916 /* first unhandled parameter is treated as a kernel 917 image 918 */ 919 kernel_filename = argv[0]; 920 argv++; 921 argc--; 922 } 923 924 } 925 926 if (!kernel_filename) 927 kernel_filename = find_kernel(); 928 929 if (!kernel_filename) { 930 kernel_usage_with_options(); 931 return EINVAL; 932 } 933 934 vmlinux_filename = find_vmlinux(); 935 936 if (nrcpus == 0) 937 nrcpus = nr_online_cpus; 938 939 if (!ram_size) 940 ram_size = get_ram_size(nrcpus); 941 942 if (ram_size < MIN_RAM_SIZE_MB) 943 die("Not enough memory specified: %lluMB (min %lluMB)", ram_size, MIN_RAM_SIZE_MB); 944 945 if (ram_size > host_ram_size()) 946 pr_warning("Guest memory size %lluMB exceeds host physical RAM size %lluMB", ram_size, host_ram_size()); 947 948 ram_size <<= MB_SHIFT; 949 950 if (!dev) 951 dev = DEFAULT_KVM_DEV; 952 953 if (!console) 954 console = DEFAULT_CONSOLE; 955 956 if (!strncmp(console, "virtio", 6)) 957 active_console = CONSOLE_VIRTIO; 958 else if (!strncmp(console, "serial", 6)) 959 active_console = CONSOLE_8250; 960 else if (!strncmp(console, "hv", 2)) 961 active_console = CONSOLE_HV; 962 else 963 pr_warning("No console!"); 964 965 if (!host_ip) 966 host_ip = DEFAULT_HOST_ADDR; 967 968 if (!guest_ip) 969 guest_ip = DEFAULT_GUEST_ADDR; 970 971 if (!guest_mac) 972 guest_mac = DEFAULT_GUEST_MAC; 973 974 if (!host_mac) 975 host_mac = DEFAULT_HOST_MAC; 976 977 if (!script) 978 script = DEFAULT_SCRIPT; 979 980 symbol__init(vmlinux_filename); 981 982 term_init(); 983 984 if (!guest_name) { 985 sprintf(default_name, "guest-%u", getpid()); 986 guest_name = default_name; 987 } 988 989 kvm = kvm__init(dev, hugetlbfs_path, ram_size, guest_name); 990 991 kvm->single_step = single_step; 992 993 ioeventfd__init(kvm); 994 995 max_cpus = kvm__max_cpus(kvm); 996 recommended_cpus = kvm__recommended_cpus(kvm); 997 998 if (nrcpus > max_cpus) { 999 printf(" # Limit the number of CPUs to %d\n", max_cpus); 1000 nrcpus = max_cpus; 1001 } else if (nrcpus > recommended_cpus) { 1002 printf(" # Warning: The maximum recommended amount of VCPUs" 1003 " is %d\n", recommended_cpus); 1004 } 1005 1006 kvm->nrcpus = nrcpus; 1007 1008 /* Alloc one pointer too many, so array ends up 0-terminated */ 1009 kvm_cpus = calloc(nrcpus + 1, sizeof(void *)); 1010 if (!kvm_cpus) 1011 die("Couldn't allocate array for %d CPUs", nrcpus); 1012 1013 irq__init(kvm); 1014 1015 pci__init(); 1016 1017 /* 1018 * vidmode should be either specified 1019 * either set by default 1020 */ 1021 if (vnc || sdl) { 1022 if (vidmode == -1) 1023 vidmode = 0x312; 1024 } else 1025 vidmode = 0; 1026 1027 memset(real_cmdline, 0, sizeof(real_cmdline)); 1028 kvm__arch_set_cmdline(real_cmdline, vnc || sdl); 1029 1030 if (strlen(real_cmdline) > 0) 1031 strcat(real_cmdline, " "); 1032 1033 if (kernel_cmdline) 1034 strlcat(real_cmdline, kernel_cmdline, sizeof(real_cmdline)); 1035 1036 if (!using_rootfs && !image_filename[0] && !initrd_filename) { 1037 char tmp[PATH_MAX]; 1038 1039 kvm_setup_create_new(custom_rootfs_name); 1040 kvm_setup_resolv(custom_rootfs_name); 1041 1042 snprintf(tmp, PATH_MAX, "%s%s", kvm__get_dir(), "default"); 1043 if (virtio_9p__register(kvm, tmp, "/dev/root") < 0) 1044 die("Unable to initialize virtio 9p"); 1045 if (virtio_9p__register(kvm, "/", "hostfs") < 0) 1046 die("Unable to initialize virtio 9p"); 1047 using_rootfs = custom_rootfs = 1; 1048 } 1049 1050 if (using_rootfs) { 1051 strcat(real_cmdline, " root=/dev/root rw rootflags=rw,trans=virtio,version=9p2000.L rootfstype=9p"); 1052 if (custom_rootfs) { 1053 kvm_run_set_sandbox(); 1054 1055 strcat(real_cmdline, " init=/virt/init"); 1056 1057 if (!no_dhcp) 1058 strcat(real_cmdline, " ip=dhcp"); 1059 if (kvm_custom_stage2()) 1060 die("Failed linking stage 2 of init."); 1061 } 1062 } else if (!strstr(real_cmdline, "root=")) { 1063 strlcat(real_cmdline, " root=/dev/vda rw ", sizeof(real_cmdline)); 1064 } 1065 1066 if (image_count) { 1067 kvm->nr_disks = image_count; 1068 kvm->disks = disk_image__open_all(image_filename, readonly_image, image_count); 1069 if (!kvm->disks) 1070 die("Unable to load all disk images."); 1071 1072 virtio_blk__init_all(kvm); 1073 } 1074 1075 printf(" # %s run -k %s -m %Lu -c %d --name %s\n", KVM_BINARY_NAME, 1076 kernel_filename, ram_size / 1024 / 1024, nrcpus, guest_name); 1077 1078 if (!kvm__load_kernel(kvm, kernel_filename, initrd_filename, 1079 real_cmdline, vidmode)) 1080 die("unable to load kernel %s", kernel_filename); 1081 1082 kvm->vmlinux = vmlinux_filename; 1083 1084 ioport__setup_arch(); 1085 1086 rtc__init(); 1087 1088 serial8250__init(kvm); 1089 1090 if (active_console == CONSOLE_VIRTIO) 1091 virtio_console__init(kvm); 1092 1093 if (virtio_rng) 1094 virtio_rng__init(kvm); 1095 1096 if (balloon) 1097 virtio_bln__init(kvm); 1098 1099 if (!network) 1100 network = DEFAULT_NETWORK; 1101 1102 virtio_9p__init(kvm); 1103 1104 for (i = 0; i < num_net_devices; i++) { 1105 net_params[i].kvm = kvm; 1106 virtio_net__init(&net_params[i]); 1107 } 1108 1109 if (num_net_devices == 0 && no_net == 0) { 1110 struct virtio_net_params net_params; 1111 1112 net_params = (struct virtio_net_params) { 1113 .guest_ip = guest_ip, 1114 .host_ip = host_ip, 1115 .kvm = kvm, 1116 .script = script, 1117 .mode = NET_MODE_USER, 1118 }; 1119 str_to_mac(guest_mac, net_params.guest_mac); 1120 str_to_mac(host_mac, net_params.host_mac); 1121 1122 virtio_net__init(&net_params); 1123 } 1124 1125 kvm__init_ram(kvm); 1126 1127 #ifdef CONFIG_X86 1128 kbd__init(kvm); 1129 #endif 1130 1131 pci_shmem__init(kvm); 1132 1133 if (vnc || sdl) 1134 fb = vesa__init(kvm); 1135 1136 if (vnc) { 1137 if (fb) 1138 vnc__init(fb); 1139 } 1140 1141 if (sdl) { 1142 if (fb) 1143 sdl__init(fb); 1144 } 1145 1146 fb__start(); 1147 1148 /* Device init all done; firmware init must 1149 * come after this (it may set up device trees etc.) 1150 */ 1151 1152 kvm__start_timer(kvm); 1153 1154 exit_code = kvm__arch_setup_firmware(kvm); 1155 if (exit_code) 1156 goto err; 1157 1158 for (i = 0; i < nrcpus; i++) { 1159 kvm_cpus[i] = kvm_cpu__init(kvm, i); 1160 if (!kvm_cpus[i]) 1161 die("unable to initialize KVM VCPU"); 1162 } 1163 1164 thread_pool__init(nr_online_cpus); 1165 ioeventfd__start(); 1166 1167 for (i = 0; i < nrcpus; i++) { 1168 if (pthread_create(&kvm_cpus[i]->thread, NULL, kvm_cpu_thread, kvm_cpus[i]) != 0) 1169 die("unable to create KVM VCPU thread"); 1170 } 1171 1172 /* Only VCPU #0 is going to exit by itself when shutting down */ 1173 if (pthread_join(kvm_cpus[0]->thread, &ret) != 0) 1174 exit_code = 1; 1175 1176 for (i = 1; i < nrcpus; i++) { 1177 if (kvm_cpus[i]->is_running) { 1178 pthread_kill(kvm_cpus[i]->thread, SIGKVMEXIT); 1179 if (pthread_join(kvm_cpus[i]->thread, &ret) != 0) 1180 die("pthread_join"); 1181 } 1182 if (ret != NULL) 1183 exit_code = 1; 1184 } 1185 1186 err: 1187 compat__print_all_messages(); 1188 1189 fb__stop(); 1190 1191 virtio_blk__delete_all(kvm); 1192 virtio_rng__delete_all(kvm); 1193 1194 disk_image__close_all(kvm->disks, image_count); 1195 kvm__delete(kvm); 1196 1197 if (!exit_code) 1198 printf("\n # KVM session ended normally.\n"); 1199 1200 return exit_code; 1201 } 1202