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 pr_info("Guest %s\n", is_paused ? "paused" : "resumed"); 526 } 527 528 static void handle_vmstate(int fd, u32 type, u32 len, u8 *msg) 529 { 530 int r = 0; 531 532 if (type == KVM_IPC_VMSTATE) 533 r = write(fd, &kvm->vm_state, sizeof(kvm->vm_state)); 534 535 if (r < 0) 536 pr_warning("Failed sending VMSTATE"); 537 } 538 539 static void handle_debug(int fd, u32 type, u32 len, u8 *msg) 540 { 541 int i; 542 struct debug_cmd_params *params; 543 u32 dbg_type; 544 u32 vcpu; 545 546 if (WARN_ON(type != KVM_IPC_DEBUG || len != sizeof(*params))) 547 return; 548 549 params = (void *)msg; 550 dbg_type = params->dbg_type; 551 vcpu = params->cpu; 552 553 if (dbg_type & KVM_DEBUG_CMD_TYPE_NMI) { 554 if ((int)vcpu >= kvm->nrcpus) 555 return; 556 557 kvm_cpus[vcpu]->needs_nmi = 1; 558 pthread_kill(kvm_cpus[vcpu]->thread, SIGUSR1); 559 } 560 561 if (!(dbg_type & KVM_DEBUG_CMD_TYPE_DUMP)) 562 return; 563 564 for (i = 0; i < nrcpus; i++) { 565 struct kvm_cpu *cpu = kvm_cpus[i]; 566 567 if (!cpu) 568 continue; 569 570 printout_done = 0; 571 572 kvm_cpu__set_debug_fd(fd); 573 pthread_kill(cpu->thread, SIGUSR1); 574 /* 575 * Wait for the vCPU to dump state before signalling 576 * the next thread. Since this is debug code it does 577 * not matter that we are burning CPU time a bit: 578 */ 579 while (!printout_done) 580 mb(); 581 } 582 583 close(fd); 584 585 serial8250__inject_sysrq(kvm); 586 } 587 588 static void handle_sigalrm(int sig) 589 { 590 kvm__arch_periodic_poll(kvm); 591 } 592 593 static void handle_stop(int fd, u32 type, u32 len, u8 *msg) 594 { 595 if (WARN_ON(type != KVM_IPC_STOP || len)) 596 return; 597 598 kvm_cpu__reboot(); 599 } 600 601 static void *kvm_cpu_thread(void *arg) 602 { 603 current_kvm_cpu = arg; 604 605 if (kvm_cpu__start(current_kvm_cpu)) 606 goto panic_kvm; 607 608 kvm_cpu__delete(current_kvm_cpu); 609 610 return (void *) (intptr_t) 0; 611 612 panic_kvm: 613 fprintf(stderr, "KVM exit reason: %u (\"%s\")\n", 614 current_kvm_cpu->kvm_run->exit_reason, 615 kvm_exit_reasons[current_kvm_cpu->kvm_run->exit_reason]); 616 if (current_kvm_cpu->kvm_run->exit_reason == KVM_EXIT_UNKNOWN) 617 fprintf(stderr, "KVM exit code: 0x%Lu\n", 618 current_kvm_cpu->kvm_run->hw.hardware_exit_reason); 619 620 kvm_cpu__set_debug_fd(STDOUT_FILENO); 621 kvm_cpu__show_registers(current_kvm_cpu); 622 kvm_cpu__show_code(current_kvm_cpu); 623 kvm_cpu__show_page_tables(current_kvm_cpu); 624 625 kvm_cpu__delete(current_kvm_cpu); 626 627 return (void *) (intptr_t) 1; 628 } 629 630 static char kernel[PATH_MAX]; 631 632 static const char *host_kernels[] = { 633 "/boot/vmlinuz", 634 "/boot/bzImage", 635 NULL 636 }; 637 638 static const char *default_kernels[] = { 639 "./bzImage", 640 "../../arch/" BUILD_ARCH "/boot/bzImage", 641 NULL 642 }; 643 644 static const char *default_vmlinux[] = { 645 "../../../vmlinux", 646 "../../vmlinux", 647 NULL 648 }; 649 650 static void kernel_usage_with_options(void) 651 { 652 const char **k; 653 struct utsname uts; 654 655 fprintf(stderr, "Fatal: could not find default kernel image in:\n"); 656 k = &default_kernels[0]; 657 while (*k) { 658 fprintf(stderr, "\t%s\n", *k); 659 k++; 660 } 661 662 if (uname(&uts) < 0) 663 return; 664 665 k = &host_kernels[0]; 666 while (*k) { 667 if (snprintf(kernel, PATH_MAX, "%s-%s", *k, uts.release) < 0) 668 return; 669 fprintf(stderr, "\t%s\n", kernel); 670 k++; 671 } 672 fprintf(stderr, "\nPlease see '%s run --help' for more options.\n\n", 673 KVM_BINARY_NAME); 674 } 675 676 static u64 host_ram_size(void) 677 { 678 long page_size; 679 long nr_pages; 680 681 nr_pages = sysconf(_SC_PHYS_PAGES); 682 if (nr_pages < 0) { 683 pr_warning("sysconf(_SC_PHYS_PAGES) failed"); 684 return 0; 685 } 686 687 page_size = sysconf(_SC_PAGE_SIZE); 688 if (page_size < 0) { 689 pr_warning("sysconf(_SC_PAGE_SIZE) failed"); 690 return 0; 691 } 692 693 return (nr_pages * page_size) >> MB_SHIFT; 694 } 695 696 /* 697 * If user didn't specify how much memory it wants to allocate for the guest, 698 * avoid filling the whole host RAM. 699 */ 700 #define RAM_SIZE_RATIO 0.8 701 702 static u64 get_ram_size(int nr_cpus) 703 { 704 u64 available; 705 u64 ram_size; 706 707 ram_size = 64 * (nr_cpus + 3); 708 709 available = host_ram_size() * RAM_SIZE_RATIO; 710 if (!available) 711 available = MIN_RAM_SIZE_MB; 712 713 if (ram_size > available) 714 ram_size = available; 715 716 return ram_size; 717 } 718 719 static const char *find_kernel(void) 720 { 721 const char **k; 722 struct stat st; 723 struct utsname uts; 724 725 k = &default_kernels[0]; 726 while (*k) { 727 if (stat(*k, &st) < 0 || !S_ISREG(st.st_mode)) { 728 k++; 729 continue; 730 } 731 strncpy(kernel, *k, PATH_MAX); 732 return kernel; 733 } 734 735 if (uname(&uts) < 0) 736 return NULL; 737 738 k = &host_kernels[0]; 739 while (*k) { 740 if (snprintf(kernel, PATH_MAX, "%s-%s", *k, uts.release) < 0) 741 return NULL; 742 743 if (stat(kernel, &st) < 0 || !S_ISREG(st.st_mode)) { 744 k++; 745 continue; 746 } 747 return kernel; 748 749 } 750 return NULL; 751 } 752 753 static const char *find_vmlinux(void) 754 { 755 const char **vmlinux; 756 757 vmlinux = &default_vmlinux[0]; 758 while (*vmlinux) { 759 struct stat st; 760 761 if (stat(*vmlinux, &st) < 0 || !S_ISREG(st.st_mode)) { 762 vmlinux++; 763 continue; 764 } 765 return *vmlinux; 766 } 767 return NULL; 768 } 769 770 void kvm_run_help(void) 771 { 772 usage_with_options(run_usage, options); 773 } 774 775 static int kvm_custom_stage2(void) 776 { 777 char tmp[PATH_MAX], dst[PATH_MAX], *src; 778 const char *rootfs = custom_rootfs_name; 779 int r; 780 781 src = realpath("guest/init_stage2", NULL); 782 if (src == NULL) 783 return -ENOMEM; 784 785 snprintf(tmp, PATH_MAX, "%s%s/virt/init_stage2", kvm__get_dir(), rootfs); 786 remove(tmp); 787 788 snprintf(dst, PATH_MAX, "/host/%s", src); 789 r = symlink(dst, tmp); 790 free(src); 791 792 return r; 793 } 794 795 static int kvm_run_set_sandbox(void) 796 { 797 const char *guestfs_name = custom_rootfs_name; 798 char path[PATH_MAX], script[PATH_MAX], *tmp; 799 800 snprintf(path, PATH_MAX, "%s%s/virt/sandbox.sh", kvm__get_dir(), guestfs_name); 801 802 remove(path); 803 804 if (sandbox == NULL) 805 return 0; 806 807 tmp = realpath(sandbox, NULL); 808 if (tmp == NULL) 809 return -ENOMEM; 810 811 snprintf(script, PATH_MAX, "/host/%s", tmp); 812 free(tmp); 813 814 return symlink(script, path); 815 } 816 817 static void kvm_write_sandbox_cmd_exactly(int fd, const char *arg) 818 { 819 const char *single_quote; 820 821 if (!*arg) { /* zero length string */ 822 if (write(fd, "''", 2) <= 0) 823 die("Failed writing sandbox script"); 824 return; 825 } 826 827 while (*arg) { 828 single_quote = strchrnul(arg, '\''); 829 830 /* write non-single-quote string as #('string') */ 831 if (arg != single_quote) { 832 if (write(fd, "'", 1) <= 0 || 833 write(fd, arg, single_quote - arg) <= 0 || 834 write(fd, "'", 1) <= 0) 835 die("Failed writing sandbox script"); 836 } 837 838 /* write single quote as #("'") */ 839 if (*single_quote) { 840 if (write(fd, "\"'\"", 3) <= 0) 841 die("Failed writing sandbox script"); 842 } else 843 break; 844 845 arg = single_quote + 1; 846 } 847 } 848 849 static void kvm_run_write_sandbox_cmd(const char **argv, int argc) 850 { 851 const char script_hdr[] = "#! /bin/bash\n\n"; 852 int fd; 853 854 remove(sandbox); 855 856 fd = open(sandbox, O_RDWR | O_CREAT, 0777); 857 if (fd < 0) 858 die("Failed creating sandbox script"); 859 860 if (write(fd, script_hdr, sizeof(script_hdr) - 1) <= 0) 861 die("Failed writing sandbox script"); 862 863 while (argc) { 864 kvm_write_sandbox_cmd_exactly(fd, argv[0]); 865 if (argc - 1) 866 if (write(fd, " ", 1) <= 0) 867 die("Failed writing sandbox script"); 868 argv++; 869 argc--; 870 } 871 if (write(fd, "\n", 1) <= 0) 872 die("Failed writing sandbox script"); 873 874 close(fd); 875 } 876 877 int kvm_cmd_run(int argc, const char **argv, const char *prefix) 878 { 879 static char real_cmdline[2048], default_name[20]; 880 struct framebuffer *fb = NULL; 881 unsigned int nr_online_cpus; 882 int exit_code = 0; 883 int max_cpus, recommended_cpus; 884 int i; 885 void *ret; 886 887 signal(SIGALRM, handle_sigalrm); 888 kvm_ipc__register_handler(KVM_IPC_DEBUG, handle_debug); 889 signal(SIGUSR1, handle_sigusr1); 890 kvm_ipc__register_handler(KVM_IPC_PAUSE, handle_pause); 891 kvm_ipc__register_handler(KVM_IPC_RESUME, handle_pause); 892 kvm_ipc__register_handler(KVM_IPC_STOP, handle_stop); 893 kvm_ipc__register_handler(KVM_IPC_VMSTATE, handle_vmstate); 894 895 nr_online_cpus = sysconf(_SC_NPROCESSORS_ONLN); 896 897 while (argc != 0) { 898 argc = parse_options(argc, argv, options, run_usage, 899 PARSE_OPT_STOP_AT_NON_OPTION | 900 PARSE_OPT_KEEP_DASHDASH); 901 if (argc != 0) { 902 /* Cusrom options, should have been handled elsewhere */ 903 if (strcmp(argv[0], "--") == 0) { 904 if (kvm_run_wrapper == KVM_RUN_SANDBOX) { 905 sandbox = DEFAULT_SANDBOX_FILENAME; 906 kvm_run_write_sandbox_cmd(argv+1, argc-1); 907 break; 908 } 909 } 910 911 if (kernel_filename) { 912 fprintf(stderr, "Cannot handle parameter: " 913 "%s\n", argv[0]); 914 usage_with_options(run_usage, options); 915 return EINVAL; 916 } 917 /* first unhandled parameter is treated as a kernel 918 image 919 */ 920 kernel_filename = argv[0]; 921 argv++; 922 argc--; 923 } 924 925 } 926 927 if (!kernel_filename) 928 kernel_filename = find_kernel(); 929 930 if (!kernel_filename) { 931 kernel_usage_with_options(); 932 return EINVAL; 933 } 934 935 vmlinux_filename = find_vmlinux(); 936 937 if (nrcpus == 0) 938 nrcpus = nr_online_cpus; 939 940 if (!ram_size) 941 ram_size = get_ram_size(nrcpus); 942 943 if (ram_size < MIN_RAM_SIZE_MB) 944 die("Not enough memory specified: %lluMB (min %lluMB)", ram_size, MIN_RAM_SIZE_MB); 945 946 if (ram_size > host_ram_size()) 947 pr_warning("Guest memory size %lluMB exceeds host physical RAM size %lluMB", ram_size, host_ram_size()); 948 949 ram_size <<= MB_SHIFT; 950 951 if (!dev) 952 dev = DEFAULT_KVM_DEV; 953 954 if (!console) 955 console = DEFAULT_CONSOLE; 956 957 if (!strncmp(console, "virtio", 6)) 958 active_console = CONSOLE_VIRTIO; 959 else if (!strncmp(console, "serial", 6)) 960 active_console = CONSOLE_8250; 961 else if (!strncmp(console, "hv", 2)) 962 active_console = CONSOLE_HV; 963 else 964 pr_warning("No console!"); 965 966 if (!host_ip) 967 host_ip = DEFAULT_HOST_ADDR; 968 969 if (!guest_ip) 970 guest_ip = DEFAULT_GUEST_ADDR; 971 972 if (!guest_mac) 973 guest_mac = DEFAULT_GUEST_MAC; 974 975 if (!host_mac) 976 host_mac = DEFAULT_HOST_MAC; 977 978 if (!script) 979 script = DEFAULT_SCRIPT; 980 981 symbol__init(vmlinux_filename); 982 983 term_init(); 984 985 if (!guest_name) { 986 sprintf(default_name, "guest-%u", getpid()); 987 guest_name = default_name; 988 } 989 990 kvm = kvm__init(dev, hugetlbfs_path, ram_size, guest_name); 991 992 kvm->single_step = single_step; 993 994 ioeventfd__init(kvm); 995 996 max_cpus = kvm__max_cpus(kvm); 997 recommended_cpus = kvm__recommended_cpus(kvm); 998 999 if (nrcpus > max_cpus) { 1000 printf(" # Limit the number of CPUs to %d\n", max_cpus); 1001 nrcpus = max_cpus; 1002 } else if (nrcpus > recommended_cpus) { 1003 printf(" # Warning: The maximum recommended amount of VCPUs" 1004 " is %d\n", recommended_cpus); 1005 } 1006 1007 kvm->nrcpus = nrcpus; 1008 1009 /* Alloc one pointer too many, so array ends up 0-terminated */ 1010 kvm_cpus = calloc(nrcpus + 1, sizeof(void *)); 1011 if (!kvm_cpus) 1012 die("Couldn't allocate array for %d CPUs", nrcpus); 1013 1014 irq__init(kvm); 1015 1016 pci__init(); 1017 1018 /* 1019 * vidmode should be either specified 1020 * either set by default 1021 */ 1022 if (vnc || sdl) { 1023 if (vidmode == -1) 1024 vidmode = 0x312; 1025 } else 1026 vidmode = 0; 1027 1028 memset(real_cmdline, 0, sizeof(real_cmdline)); 1029 kvm__arch_set_cmdline(real_cmdline, vnc || sdl); 1030 1031 if (strlen(real_cmdline) > 0) 1032 strcat(real_cmdline, " "); 1033 1034 if (kernel_cmdline) 1035 strlcat(real_cmdline, kernel_cmdline, sizeof(real_cmdline)); 1036 1037 if (!using_rootfs && !image_filename[0] && !initrd_filename) { 1038 char tmp[PATH_MAX]; 1039 1040 kvm_setup_create_new(custom_rootfs_name); 1041 kvm_setup_resolv(custom_rootfs_name); 1042 1043 snprintf(tmp, PATH_MAX, "%s%s", kvm__get_dir(), "default"); 1044 if (virtio_9p__register(kvm, tmp, "/dev/root") < 0) 1045 die("Unable to initialize virtio 9p"); 1046 if (virtio_9p__register(kvm, "/", "hostfs") < 0) 1047 die("Unable to initialize virtio 9p"); 1048 using_rootfs = custom_rootfs = 1; 1049 } 1050 1051 if (using_rootfs) { 1052 strcat(real_cmdline, " root=/dev/root rw rootflags=rw,trans=virtio,version=9p2000.L rootfstype=9p"); 1053 if (custom_rootfs) { 1054 kvm_run_set_sandbox(); 1055 1056 strcat(real_cmdline, " init=/virt/init"); 1057 1058 if (!no_dhcp) 1059 strcat(real_cmdline, " ip=dhcp"); 1060 if (kvm_custom_stage2()) 1061 die("Failed linking stage 2 of init."); 1062 } 1063 } else if (!strstr(real_cmdline, "root=")) { 1064 strlcat(real_cmdline, " root=/dev/vda rw ", sizeof(real_cmdline)); 1065 } 1066 1067 if (image_count) { 1068 kvm->nr_disks = image_count; 1069 kvm->disks = disk_image__open_all(image_filename, readonly_image, image_count); 1070 if (!kvm->disks) 1071 die("Unable to load all disk images."); 1072 1073 virtio_blk__init_all(kvm); 1074 } 1075 1076 printf(" # %s run -k %s -m %Lu -c %d --name %s\n", KVM_BINARY_NAME, 1077 kernel_filename, ram_size / 1024 / 1024, nrcpus, guest_name); 1078 1079 if (!kvm__load_kernel(kvm, kernel_filename, initrd_filename, 1080 real_cmdline, vidmode)) 1081 die("unable to load kernel %s", kernel_filename); 1082 1083 kvm->vmlinux = vmlinux_filename; 1084 1085 ioport__setup_arch(); 1086 1087 rtc__init(); 1088 1089 serial8250__init(kvm); 1090 1091 if (active_console == CONSOLE_VIRTIO) 1092 virtio_console__init(kvm); 1093 1094 if (virtio_rng) 1095 virtio_rng__init(kvm); 1096 1097 if (balloon) 1098 virtio_bln__init(kvm); 1099 1100 if (!network) 1101 network = DEFAULT_NETWORK; 1102 1103 virtio_9p__init(kvm); 1104 1105 for (i = 0; i < num_net_devices; i++) { 1106 net_params[i].kvm = kvm; 1107 virtio_net__init(&net_params[i]); 1108 } 1109 1110 if (num_net_devices == 0 && no_net == 0) { 1111 struct virtio_net_params net_params; 1112 1113 net_params = (struct virtio_net_params) { 1114 .guest_ip = guest_ip, 1115 .host_ip = host_ip, 1116 .kvm = kvm, 1117 .script = script, 1118 .mode = NET_MODE_USER, 1119 }; 1120 str_to_mac(guest_mac, net_params.guest_mac); 1121 str_to_mac(host_mac, net_params.host_mac); 1122 1123 virtio_net__init(&net_params); 1124 } 1125 1126 kvm__init_ram(kvm); 1127 1128 #ifdef CONFIG_X86 1129 kbd__init(kvm); 1130 #endif 1131 1132 pci_shmem__init(kvm); 1133 1134 if (vnc || sdl) 1135 fb = vesa__init(kvm); 1136 1137 if (vnc) { 1138 if (fb) 1139 vnc__init(fb); 1140 } 1141 1142 if (sdl) { 1143 if (fb) 1144 sdl__init(fb); 1145 } 1146 1147 fb__start(); 1148 1149 /* Device init all done; firmware init must 1150 * come after this (it may set up device trees etc.) 1151 */ 1152 1153 kvm__start_timer(kvm); 1154 1155 exit_code = kvm__arch_setup_firmware(kvm); 1156 if (exit_code) 1157 goto err; 1158 1159 for (i = 0; i < nrcpus; i++) { 1160 kvm_cpus[i] = kvm_cpu__init(kvm, i); 1161 if (!kvm_cpus[i]) 1162 die("unable to initialize KVM VCPU"); 1163 } 1164 1165 thread_pool__init(nr_online_cpus); 1166 ioeventfd__start(); 1167 1168 for (i = 0; i < nrcpus; i++) { 1169 if (pthread_create(&kvm_cpus[i]->thread, NULL, kvm_cpu_thread, kvm_cpus[i]) != 0) 1170 die("unable to create KVM VCPU thread"); 1171 } 1172 1173 /* Only VCPU #0 is going to exit by itself when shutting down */ 1174 if (pthread_join(kvm_cpus[0]->thread, &ret) != 0) 1175 exit_code = 1; 1176 1177 for (i = 1; i < nrcpus; i++) { 1178 if (kvm_cpus[i]->is_running) { 1179 pthread_kill(kvm_cpus[i]->thread, SIGKVMEXIT); 1180 if (pthread_join(kvm_cpus[i]->thread, &ret) != 0) 1181 die("pthread_join"); 1182 } 1183 if (ret != NULL) 1184 exit_code = 1; 1185 } 1186 1187 err: 1188 compat__print_all_messages(); 1189 1190 fb__stop(); 1191 1192 virtio_blk__delete_all(kvm); 1193 virtio_rng__delete_all(kvm); 1194 1195 disk_image__close_all(kvm->disks, image_count); 1196 kvm__delete(kvm); 1197 1198 if (!exit_code) 1199 printf("\n # KVM session ended normally.\n"); 1200 1201 return exit_code; 1202 } 1203