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-scsi.h" 12 #include "kvm/virtio-blk.h" 13 #include "kvm/virtio-net.h" 14 #include "kvm/virtio-rng.h" 15 #include "kvm/ioeventfd.h" 16 #include "kvm/virtio-9p.h" 17 #include "kvm/barrier.h" 18 #include "kvm/kvm-cpu.h" 19 #include "kvm/ioport.h" 20 #include "kvm/symbol.h" 21 #include "kvm/i8042.h" 22 #include "kvm/mutex.h" 23 #include "kvm/term.h" 24 #include "kvm/util.h" 25 #include "kvm/strbuf.h" 26 #include "kvm/vesa.h" 27 #include "kvm/irq.h" 28 #include "kvm/kvm.h" 29 #include "kvm/pci.h" 30 #include "kvm/rtc.h" 31 #include "kvm/sdl.h" 32 #include "kvm/vnc.h" 33 #include "kvm/guest_compat.h" 34 #include "kvm/pci-shmem.h" 35 #include "kvm/kvm-ipc.h" 36 #include "kvm/builtin-debug.h" 37 38 #include <linux/types.h> 39 #include <linux/err.h> 40 41 #include <sys/utsname.h> 42 #include <sys/types.h> 43 #include <sys/stat.h> 44 #include <termios.h> 45 #include <signal.h> 46 #include <stdlib.h> 47 #include <string.h> 48 #include <unistd.h> 49 #include <ctype.h> 50 #include <stdio.h> 51 52 #define MB_SHIFT (20) 53 #define KB_SHIFT (10) 54 #define GB_SHIFT (30) 55 56 struct kvm *kvm; 57 __thread struct kvm_cpu *current_kvm_cpu; 58 59 static int kvm_run_wrapper; 60 61 bool do_debug_print = false; 62 63 static int vidmode = -1; 64 65 extern char _binary_guest_init_start; 66 extern char _binary_guest_init_size; 67 68 static const char * const run_usage[] = { 69 "lkvm run [<options>] [<kernel image>]", 70 NULL 71 }; 72 73 enum { 74 KVM_RUN_DEFAULT, 75 KVM_RUN_SANDBOX, 76 }; 77 78 static int img_name_parser(const struct option *opt, const char *arg, int unset) 79 { 80 char path[PATH_MAX]; 81 struct stat st; 82 struct kvm *kvm = opt->ptr; 83 84 if (stat(arg, &st) == 0 && 85 S_ISDIR(st.st_mode)) { 86 char tmp[PATH_MAX]; 87 88 if (kvm->cfg.using_rootfs) 89 die("Please use only one rootfs directory atmost"); 90 91 if (realpath(arg, tmp) == 0 || 92 virtio_9p__register(kvm, tmp, "/dev/root") < 0) 93 die("Unable to initialize virtio 9p"); 94 kvm->cfg.using_rootfs = 1; 95 return 0; 96 } 97 98 snprintf(path, PATH_MAX, "%s%s", kvm__get_dir(), arg); 99 100 if (stat(path, &st) == 0 && 101 S_ISDIR(st.st_mode)) { 102 char tmp[PATH_MAX]; 103 104 if (kvm->cfg.using_rootfs) 105 die("Please use only one rootfs directory atmost"); 106 107 if (realpath(path, tmp) == 0 || 108 virtio_9p__register(kvm, tmp, "/dev/root") < 0) 109 die("Unable to initialize virtio 9p"); 110 if (virtio_9p__register(kvm, "/", "hostfs") < 0) 111 die("Unable to initialize virtio 9p"); 112 kvm_setup_resolv(arg); 113 kvm->cfg.using_rootfs = kvm->cfg.custom_rootfs = 1; 114 kvm->cfg.custom_rootfs_name = arg; 115 return 0; 116 } 117 118 return disk_img_name_parser(opt, arg, unset); 119 } 120 121 void kvm_run_set_wrapper_sandbox(void) 122 { 123 kvm_run_wrapper = KVM_RUN_SANDBOX; 124 } 125 126 static int virtio_9p_rootdir_parser(const struct option *opt, const char *arg, int unset) 127 { 128 char *tag_name; 129 char tmp[PATH_MAX]; 130 131 /* 132 * 9p dir can be of the form dirname,tag_name or 133 * just dirname. In the later case we use the 134 * default tag name 135 */ 136 tag_name = strstr(arg, ","); 137 if (tag_name) { 138 *tag_name = '\0'; 139 tag_name++; 140 } 141 if (realpath(arg, tmp)) { 142 if (virtio_9p__register(kvm, tmp, tag_name) < 0) 143 die("Unable to initialize virtio 9p"); 144 } else 145 die("Failed resolving 9p path"); 146 return 0; 147 } 148 149 static inline void str_to_mac(const char *str, char *mac) 150 { 151 sscanf(str, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", 152 mac, mac+1, mac+2, mac+3, mac+4, mac+5); 153 } 154 static int set_net_param(struct virtio_net_params *p, const char *param, 155 const char *val) 156 { 157 if (strcmp(param, "guest_mac") == 0) { 158 str_to_mac(val, p->guest_mac); 159 } else if (strcmp(param, "mode") == 0) { 160 if (!strncmp(val, "user", 4)) { 161 int i; 162 163 for (i = 0; i < kvm->cfg.num_net_devices; i++) 164 if (kvm->cfg.net_params[i].mode == NET_MODE_USER) 165 die("Only one usermode network device allowed at a time"); 166 p->mode = NET_MODE_USER; 167 } else if (!strncmp(val, "tap", 3)) { 168 p->mode = NET_MODE_TAP; 169 } else if (!strncmp(val, "none", 4)) { 170 kvm->cfg.no_net = 1; 171 return -1; 172 } else 173 die("Unknown network mode %s, please use user, tap or none", kvm->cfg.network); 174 } else if (strcmp(param, "script") == 0) { 175 p->script = strdup(val); 176 } else if (strcmp(param, "guest_ip") == 0) { 177 p->guest_ip = strdup(val); 178 } else if (strcmp(param, "host_ip") == 0) { 179 p->host_ip = strdup(val); 180 } else if (strcmp(param, "trans") == 0) { 181 p->trans = strdup(val); 182 } else if (strcmp(param, "vhost") == 0) { 183 p->vhost = atoi(val); 184 } else if (strcmp(param, "fd") == 0) { 185 p->fd = atoi(val); 186 } else 187 die("Unknown network parameter %s", param); 188 189 return 0; 190 } 191 192 static int netdev_parser(const struct option *opt, const char *arg, int unset) 193 { 194 struct virtio_net_params p; 195 char *buf = NULL, *cmd = NULL, *cur = NULL; 196 bool on_cmd = true; 197 198 if (arg) { 199 buf = strdup(arg); 200 if (buf == NULL) 201 die("Failed allocating new net buffer"); 202 cur = strtok(buf, ",="); 203 } 204 205 p = (struct virtio_net_params) { 206 .guest_ip = DEFAULT_GUEST_ADDR, 207 .host_ip = DEFAULT_HOST_ADDR, 208 .script = DEFAULT_SCRIPT, 209 .mode = NET_MODE_TAP, 210 }; 211 212 str_to_mac(DEFAULT_GUEST_MAC, p.guest_mac); 213 p.guest_mac[5] += kvm->cfg.num_net_devices; 214 215 while (cur) { 216 if (on_cmd) { 217 cmd = cur; 218 } else { 219 if (set_net_param(&p, cmd, cur) < 0) 220 goto done; 221 } 222 on_cmd = !on_cmd; 223 224 cur = strtok(NULL, ",="); 225 }; 226 227 kvm->cfg.num_net_devices++; 228 229 kvm->cfg.net_params = realloc(kvm->cfg.net_params, kvm->cfg.num_net_devices * sizeof(*kvm->cfg.net_params)); 230 if (kvm->cfg.net_params == NULL) 231 die("Failed adding new network device"); 232 233 kvm->cfg.net_params[kvm->cfg.num_net_devices - 1] = p; 234 235 done: 236 free(buf); 237 return 0; 238 } 239 240 #define BUILD_OPTIONS(name, cfg, kvm) \ 241 struct option name[] = { \ 242 OPT_GROUP("Basic options:"), \ 243 OPT_STRING('\0', "name", &(cfg)->guest_name, "guest name", \ 244 "A name for the guest"), \ 245 OPT_INTEGER('c', "cpus", &(cfg)->nrcpus, "Number of CPUs"), \ 246 OPT_U64('m', "mem", &(cfg)->ram_size, "Virtual machine memory size\ 247 in MiB."), \ 248 OPT_CALLBACK('\0', "shmem", NULL, \ 249 "[pci:]<addr>:<size>[:handle=<handle>][:create]", \ 250 "Share host shmem with guest via pci device", \ 251 shmem_parser, NULL), \ 252 OPT_CALLBACK('d', "disk", kvm, "image or rootfs_dir", "Disk \ 253 image or rootfs directory", img_name_parser, \ 254 kvm), \ 255 OPT_BOOLEAN('\0', "balloon", &(cfg)->balloon, "Enable virtio \ 256 balloon"), \ 257 OPT_BOOLEAN('\0', "vnc", &(cfg)->vnc, "Enable VNC framebuffer"),\ 258 OPT_BOOLEAN('\0', "sdl", &(cfg)->sdl, "Enable SDL framebuffer"),\ 259 OPT_BOOLEAN('\0', "rng", &(cfg)->virtio_rng, "Enable virtio Random\ 260 Number Generator"), \ 261 OPT_CALLBACK('\0', "9p", NULL, "dir_to_share,tag_name", \ 262 "Enable virtio 9p to share files between host and \ 263 guest", virtio_9p_rootdir_parser, NULL), \ 264 OPT_STRING('\0', "console", &(cfg)->console, "serial, virtio or \ 265 hv", "Console to use"), \ 266 OPT_STRING('\0', "dev", &(cfg)->dev, "device_file", \ 267 "KVM device file"), \ 268 OPT_CALLBACK('\0', "tty", NULL, "tty id", \ 269 "Remap guest TTY into a pty on the host", \ 270 tty_parser, NULL), \ 271 OPT_STRING('\0', "sandbox", &(cfg)->sandbox, "script", \ 272 "Run this script when booting into custom \ 273 rootfs"), \ 274 OPT_STRING('\0', "hugetlbfs", &(cfg)->hugetlbfs_path, "path", \ 275 "Hugetlbfs path"), \ 276 \ 277 OPT_GROUP("Kernel options:"), \ 278 OPT_STRING('k', "kernel", &(cfg)->kernel_filename, "kernel", \ 279 "Kernel to boot in virtual machine"), \ 280 OPT_STRING('i', "initrd", &(cfg)->initrd_filename, "initrd", \ 281 "Initial RAM disk image"), \ 282 OPT_STRING('p', "params", &(cfg)->kernel_cmdline, "params", \ 283 "Kernel command line arguments"), \ 284 OPT_STRING('f', "firmware", &(cfg)->firmware_filename, "firmware",\ 285 "Firmware image to boot in virtual machine"), \ 286 \ 287 OPT_GROUP("Networking options:"), \ 288 OPT_CALLBACK_DEFAULT('n', "network", NULL, "network params", \ 289 "Create a new guest NIC", \ 290 netdev_parser, NULL, NULL), \ 291 OPT_BOOLEAN('\0', "no-dhcp", &(cfg)->no_dhcp, "Disable kernel DHCP\ 292 in rootfs mode"), \ 293 \ 294 OPT_GROUP("BIOS options:"), \ 295 OPT_INTEGER('\0', "vidmode", &vidmode, \ 296 "Video mode"), \ 297 \ 298 OPT_GROUP("Debug options:"), \ 299 OPT_BOOLEAN('\0', "debug", &do_debug_print, \ 300 "Enable debug messages"), \ 301 OPT_BOOLEAN('\0', "debug-single-step", &(cfg)->single_step, \ 302 "Enable single stepping"), \ 303 OPT_BOOLEAN('\0', "debug-ioport", &(cfg)->ioport_debug, \ 304 "Enable ioport debugging"), \ 305 OPT_BOOLEAN('\0', "debug-mmio", &(cfg)->mmio_debug, \ 306 "Enable MMIO debugging"), \ 307 OPT_INTEGER('\0', "debug-iodelay", &(cfg)->debug_iodelay, \ 308 "Delay IO by millisecond"), \ 309 OPT_END() \ 310 }; 311 312 /* 313 * Serialize debug printout so that the output of multiple vcpus does not 314 * get mixed up: 315 */ 316 static int printout_done; 317 318 static void handle_sigusr1(int sig) 319 { 320 struct kvm_cpu *cpu = current_kvm_cpu; 321 int fd = kvm_cpu__get_debug_fd(); 322 323 if (!cpu || cpu->needs_nmi) 324 return; 325 326 dprintf(fd, "\n #\n # vCPU #%ld's dump:\n #\n", cpu->cpu_id); 327 kvm_cpu__show_registers(cpu); 328 kvm_cpu__show_code(cpu); 329 kvm_cpu__show_page_tables(cpu); 330 fflush(stdout); 331 printout_done = 1; 332 mb(); 333 } 334 335 /* Pause/resume the guest using SIGUSR2 */ 336 static int is_paused; 337 338 static void handle_pause(int fd, u32 type, u32 len, u8 *msg) 339 { 340 if (WARN_ON(len)) 341 return; 342 343 if (type == KVM_IPC_RESUME && is_paused) { 344 kvm->vm_state = KVM_VMSTATE_RUNNING; 345 kvm__continue(); 346 } else if (type == KVM_IPC_PAUSE && !is_paused) { 347 kvm->vm_state = KVM_VMSTATE_PAUSED; 348 ioctl(kvm->vm_fd, KVM_KVMCLOCK_CTRL); 349 kvm__pause(); 350 } else { 351 return; 352 } 353 354 is_paused = !is_paused; 355 } 356 357 static void handle_vmstate(int fd, u32 type, u32 len, u8 *msg) 358 { 359 int r = 0; 360 361 if (type == KVM_IPC_VMSTATE) 362 r = write(fd, &kvm->vm_state, sizeof(kvm->vm_state)); 363 364 if (r < 0) 365 pr_warning("Failed sending VMSTATE"); 366 } 367 368 static void handle_debug(int fd, u32 type, u32 len, u8 *msg) 369 { 370 int i; 371 struct debug_cmd_params *params; 372 u32 dbg_type; 373 u32 vcpu; 374 375 if (WARN_ON(type != KVM_IPC_DEBUG || len != sizeof(*params))) 376 return; 377 378 params = (void *)msg; 379 dbg_type = params->dbg_type; 380 vcpu = params->cpu; 381 382 if (dbg_type & KVM_DEBUG_CMD_TYPE_SYSRQ) 383 serial8250__inject_sysrq(kvm, params->sysrq); 384 385 if (dbg_type & KVM_DEBUG_CMD_TYPE_NMI) { 386 if ((int)vcpu >= kvm->nrcpus) 387 return; 388 389 kvm->cpus[vcpu]->needs_nmi = 1; 390 pthread_kill(kvm->cpus[vcpu]->thread, SIGUSR1); 391 } 392 393 if (!(dbg_type & KVM_DEBUG_CMD_TYPE_DUMP)) 394 return; 395 396 for (i = 0; i < kvm->nrcpus; i++) { 397 struct kvm_cpu *cpu = kvm->cpus[i]; 398 399 if (!cpu) 400 continue; 401 402 printout_done = 0; 403 404 kvm_cpu__set_debug_fd(fd); 405 pthread_kill(cpu->thread, SIGUSR1); 406 /* 407 * Wait for the vCPU to dump state before signalling 408 * the next thread. Since this is debug code it does 409 * not matter that we are burning CPU time a bit: 410 */ 411 while (!printout_done) 412 mb(); 413 } 414 415 close(fd); 416 417 serial8250__inject_sysrq(kvm, 'p'); 418 } 419 420 static void handle_sigalrm(int sig) 421 { 422 kvm__arch_periodic_poll(kvm); 423 } 424 425 static void handle_stop(int fd, u32 type, u32 len, u8 *msg) 426 { 427 if (WARN_ON(type != KVM_IPC_STOP || len)) 428 return; 429 430 kvm_cpu__reboot(kvm); 431 } 432 433 static void *kvm_cpu_thread(void *arg) 434 { 435 current_kvm_cpu = arg; 436 437 if (kvm_cpu__start(current_kvm_cpu)) 438 goto panic_kvm; 439 440 return (void *) (intptr_t) 0; 441 442 panic_kvm: 443 fprintf(stderr, "KVM exit reason: %u (\"%s\")\n", 444 current_kvm_cpu->kvm_run->exit_reason, 445 kvm_exit_reasons[current_kvm_cpu->kvm_run->exit_reason]); 446 if (current_kvm_cpu->kvm_run->exit_reason == KVM_EXIT_UNKNOWN) 447 fprintf(stderr, "KVM exit code: 0x%Lu\n", 448 current_kvm_cpu->kvm_run->hw.hardware_exit_reason); 449 450 kvm_cpu__set_debug_fd(STDOUT_FILENO); 451 kvm_cpu__show_registers(current_kvm_cpu); 452 kvm_cpu__show_code(current_kvm_cpu); 453 kvm_cpu__show_page_tables(current_kvm_cpu); 454 455 return (void *) (intptr_t) 1; 456 } 457 458 static char kernel[PATH_MAX]; 459 460 static const char *host_kernels[] = { 461 "/boot/vmlinuz", 462 "/boot/bzImage", 463 NULL 464 }; 465 466 static const char *default_kernels[] = { 467 "./bzImage", 468 "arch/" BUILD_ARCH "/boot/bzImage", 469 "../../arch/" BUILD_ARCH "/boot/bzImage", 470 NULL 471 }; 472 473 static const char *default_vmlinux[] = { 474 "vmlinux", 475 "../../../vmlinux", 476 "../../vmlinux", 477 NULL 478 }; 479 480 static void kernel_usage_with_options(void) 481 { 482 const char **k; 483 struct utsname uts; 484 485 fprintf(stderr, "Fatal: could not find default kernel image in:\n"); 486 k = &default_kernels[0]; 487 while (*k) { 488 fprintf(stderr, "\t%s\n", *k); 489 k++; 490 } 491 492 if (uname(&uts) < 0) 493 return; 494 495 k = &host_kernels[0]; 496 while (*k) { 497 if (snprintf(kernel, PATH_MAX, "%s-%s", *k, uts.release) < 0) 498 return; 499 fprintf(stderr, "\t%s\n", kernel); 500 k++; 501 } 502 fprintf(stderr, "\nPlease see '%s run --help' for more options.\n\n", 503 KVM_BINARY_NAME); 504 } 505 506 static u64 host_ram_size(void) 507 { 508 long page_size; 509 long nr_pages; 510 511 nr_pages = sysconf(_SC_PHYS_PAGES); 512 if (nr_pages < 0) { 513 pr_warning("sysconf(_SC_PHYS_PAGES) failed"); 514 return 0; 515 } 516 517 page_size = sysconf(_SC_PAGE_SIZE); 518 if (page_size < 0) { 519 pr_warning("sysconf(_SC_PAGE_SIZE) failed"); 520 return 0; 521 } 522 523 return (nr_pages * page_size) >> MB_SHIFT; 524 } 525 526 /* 527 * If user didn't specify how much memory it wants to allocate for the guest, 528 * avoid filling the whole host RAM. 529 */ 530 #define RAM_SIZE_RATIO 0.8 531 532 static u64 get_ram_size(int nr_cpus) 533 { 534 u64 available; 535 u64 ram_size; 536 537 ram_size = 64 * (nr_cpus + 3); 538 539 available = host_ram_size() * RAM_SIZE_RATIO; 540 if (!available) 541 available = MIN_RAM_SIZE_MB; 542 543 if (ram_size > available) 544 ram_size = available; 545 546 return ram_size; 547 } 548 549 static const char *find_kernel(void) 550 { 551 const char **k; 552 struct stat st; 553 struct utsname uts; 554 555 k = &default_kernels[0]; 556 while (*k) { 557 if (stat(*k, &st) < 0 || !S_ISREG(st.st_mode)) { 558 k++; 559 continue; 560 } 561 strncpy(kernel, *k, PATH_MAX); 562 return kernel; 563 } 564 565 if (uname(&uts) < 0) 566 return NULL; 567 568 k = &host_kernels[0]; 569 while (*k) { 570 if (snprintf(kernel, PATH_MAX, "%s-%s", *k, uts.release) < 0) 571 return NULL; 572 573 if (stat(kernel, &st) < 0 || !S_ISREG(st.st_mode)) { 574 k++; 575 continue; 576 } 577 return kernel; 578 579 } 580 return NULL; 581 } 582 583 static const char *find_vmlinux(void) 584 { 585 const char **vmlinux; 586 587 vmlinux = &default_vmlinux[0]; 588 while (*vmlinux) { 589 struct stat st; 590 591 if (stat(*vmlinux, &st) < 0 || !S_ISREG(st.st_mode)) { 592 vmlinux++; 593 continue; 594 } 595 return *vmlinux; 596 } 597 return NULL; 598 } 599 600 void kvm_run_help(void) 601 { 602 BUILD_OPTIONS(options, &kvm->cfg, kvm); 603 usage_with_options(run_usage, options); 604 } 605 606 static int kvm_setup_guest_init(void) 607 { 608 const char *rootfs = kvm->cfg.custom_rootfs_name; 609 char tmp[PATH_MAX]; 610 size_t size; 611 int fd, ret; 612 char *data; 613 614 /* Setup /virt/init */ 615 size = (size_t)&_binary_guest_init_size; 616 data = (char *)&_binary_guest_init_start; 617 snprintf(tmp, PATH_MAX, "%s%s/virt/init", kvm__get_dir(), rootfs); 618 remove(tmp); 619 fd = open(tmp, O_CREAT | O_WRONLY, 0755); 620 if (fd < 0) 621 die("Fail to setup %s", tmp); 622 ret = xwrite(fd, data, size); 623 if (ret < 0) 624 die("Fail to setup %s", tmp); 625 close(fd); 626 627 return 0; 628 } 629 630 static int kvm_run_set_sandbox(void) 631 { 632 const char *guestfs_name = kvm->cfg.custom_rootfs_name; 633 char path[PATH_MAX], script[PATH_MAX], *tmp; 634 635 snprintf(path, PATH_MAX, "%s%s/virt/sandbox.sh", kvm__get_dir(), guestfs_name); 636 637 remove(path); 638 639 if (kvm->cfg.sandbox == NULL) 640 return 0; 641 642 tmp = realpath(kvm->cfg.sandbox, NULL); 643 if (tmp == NULL) 644 return -ENOMEM; 645 646 snprintf(script, PATH_MAX, "/host/%s", tmp); 647 free(tmp); 648 649 return symlink(script, path); 650 } 651 652 static void kvm_write_sandbox_cmd_exactly(int fd, const char *arg) 653 { 654 const char *single_quote; 655 656 if (!*arg) { /* zero length string */ 657 if (write(fd, "''", 2) <= 0) 658 die("Failed writing sandbox script"); 659 return; 660 } 661 662 while (*arg) { 663 single_quote = strchrnul(arg, '\''); 664 665 /* write non-single-quote string as #('string') */ 666 if (arg != single_quote) { 667 if (write(fd, "'", 1) <= 0 || 668 write(fd, arg, single_quote - arg) <= 0 || 669 write(fd, "'", 1) <= 0) 670 die("Failed writing sandbox script"); 671 } 672 673 /* write single quote as #("'") */ 674 if (*single_quote) { 675 if (write(fd, "\"'\"", 3) <= 0) 676 die("Failed writing sandbox script"); 677 } else 678 break; 679 680 arg = single_quote + 1; 681 } 682 } 683 684 static void resolve_program(const char *src, char *dst, size_t len) 685 { 686 struct stat st; 687 int err; 688 689 err = stat(src, &st); 690 691 if (!err && S_ISREG(st.st_mode)) { 692 char resolved_path[PATH_MAX]; 693 694 if (!realpath(src, resolved_path)) 695 die("Unable to resolve program %s: %s\n", src, strerror(errno)); 696 697 snprintf(dst, len, "/host%s", resolved_path); 698 } else 699 strncpy(dst, src, len); 700 } 701 702 static void kvm_run_write_sandbox_cmd(const char **argv, int argc) 703 { 704 const char script_hdr[] = "#! /bin/bash\n\n"; 705 char program[PATH_MAX]; 706 int fd; 707 708 remove(kvm->cfg.sandbox); 709 710 fd = open(kvm->cfg.sandbox, O_RDWR | O_CREAT, 0777); 711 if (fd < 0) 712 die("Failed creating sandbox script"); 713 714 if (write(fd, script_hdr, sizeof(script_hdr) - 1) <= 0) 715 die("Failed writing sandbox script"); 716 717 resolve_program(argv[0], program, PATH_MAX); 718 kvm_write_sandbox_cmd_exactly(fd, program); 719 720 argv++; 721 argc--; 722 723 while (argc) { 724 if (write(fd, " ", 1) <= 0) 725 die("Failed writing sandbox script"); 726 727 kvm_write_sandbox_cmd_exactly(fd, argv[0]); 728 argv++; 729 argc--; 730 } 731 if (write(fd, "\n", 1) <= 0) 732 die("Failed writing sandbox script"); 733 734 close(fd); 735 } 736 737 static int kvm_cmd_run_init(int argc, const char **argv) 738 { 739 static char real_cmdline[2048], default_name[20]; 740 struct framebuffer *fb = NULL; 741 unsigned int nr_online_cpus; 742 int i, r; 743 744 kvm = kvm__new(); 745 if (IS_ERR(kvm)) 746 return PTR_ERR(kvm); 747 748 signal(SIGALRM, handle_sigalrm); 749 kvm_ipc__register_handler(KVM_IPC_DEBUG, handle_debug); 750 signal(SIGUSR1, handle_sigusr1); 751 kvm_ipc__register_handler(KVM_IPC_PAUSE, handle_pause); 752 kvm_ipc__register_handler(KVM_IPC_RESUME, handle_pause); 753 kvm_ipc__register_handler(KVM_IPC_STOP, handle_stop); 754 kvm_ipc__register_handler(KVM_IPC_VMSTATE, handle_vmstate); 755 756 nr_online_cpus = sysconf(_SC_NPROCESSORS_ONLN); 757 kvm->cfg.custom_rootfs_name = "default"; 758 759 while (argc != 0) { 760 BUILD_OPTIONS(options, &kvm->cfg, kvm); 761 argc = parse_options(argc, argv, options, run_usage, 762 PARSE_OPT_STOP_AT_NON_OPTION | 763 PARSE_OPT_KEEP_DASHDASH); 764 if (argc != 0) { 765 /* Cusrom options, should have been handled elsewhere */ 766 if (strcmp(argv[0], "--") == 0) { 767 if (kvm_run_wrapper == KVM_RUN_SANDBOX) { 768 kvm->cfg.sandbox = DEFAULT_SANDBOX_FILENAME; 769 kvm_run_write_sandbox_cmd(argv+1, argc-1); 770 break; 771 } 772 } 773 774 if ((kvm_run_wrapper == KVM_RUN_DEFAULT && kvm->cfg.kernel_filename) || 775 (kvm_run_wrapper == KVM_RUN_SANDBOX && kvm->cfg.sandbox)) { 776 fprintf(stderr, "Cannot handle parameter: " 777 "%s\n", argv[0]); 778 usage_with_options(run_usage, options); 779 free(kvm); 780 return -EINVAL; 781 } 782 if (kvm_run_wrapper == KVM_RUN_SANDBOX) { 783 /* 784 * first unhandled parameter is treated as 785 * sandbox command 786 */ 787 kvm->cfg.sandbox = DEFAULT_SANDBOX_FILENAME; 788 kvm_run_write_sandbox_cmd(argv, argc); 789 } else { 790 /* 791 * first unhandled parameter is treated as a kernel 792 * image 793 */ 794 kvm->cfg.kernel_filename = argv[0]; 795 } 796 argv++; 797 argc--; 798 } 799 800 } 801 802 kvm->nr_disks = kvm->cfg.image_count; 803 804 if (!kvm->cfg.kernel_filename) 805 kvm->cfg.kernel_filename = find_kernel(); 806 807 if (!kvm->cfg.kernel_filename) { 808 kernel_usage_with_options(); 809 return -EINVAL; 810 } 811 812 kvm->cfg.vmlinux_filename = find_vmlinux(); 813 814 if (kvm->cfg.nrcpus == 0) 815 kvm->cfg.nrcpus = nr_online_cpus; 816 817 if (!kvm->cfg.ram_size) 818 kvm->cfg.ram_size = get_ram_size(kvm->cfg.nrcpus); 819 820 if (kvm->cfg.ram_size < MIN_RAM_SIZE_MB) 821 die("Not enough memory specified: %lluMB (min %lluMB)", kvm->cfg.ram_size, MIN_RAM_SIZE_MB); 822 823 if (kvm->cfg.ram_size > host_ram_size()) 824 pr_warning("Guest memory size %lluMB exceeds host physical RAM size %lluMB", kvm->cfg.ram_size, host_ram_size()); 825 826 kvm->cfg.ram_size <<= MB_SHIFT; 827 828 if (!kvm->cfg.dev) 829 kvm->cfg.dev = DEFAULT_KVM_DEV; 830 831 if (!kvm->cfg.console) 832 kvm->cfg.console = DEFAULT_CONSOLE; 833 834 if (!strncmp(kvm->cfg.console, "virtio", 6)) 835 kvm->cfg.active_console = CONSOLE_VIRTIO; 836 else if (!strncmp(kvm->cfg.console, "serial", 6)) 837 kvm->cfg.active_console = CONSOLE_8250; 838 else if (!strncmp(kvm->cfg.console, "hv", 2)) 839 kvm->cfg.active_console = CONSOLE_HV; 840 else 841 pr_warning("No console!"); 842 843 if (!kvm->cfg.host_ip) 844 kvm->cfg.host_ip = DEFAULT_HOST_ADDR; 845 846 if (!kvm->cfg.guest_ip) 847 kvm->cfg.guest_ip = DEFAULT_GUEST_ADDR; 848 849 if (!kvm->cfg.guest_mac) 850 kvm->cfg.guest_mac = DEFAULT_GUEST_MAC; 851 852 if (!kvm->cfg.host_mac) 853 kvm->cfg.host_mac = DEFAULT_HOST_MAC; 854 855 if (!kvm->cfg.script) 856 kvm->cfg.script = DEFAULT_SCRIPT; 857 858 r = term_init(kvm); 859 if (r < 0) { 860 pr_err("term_init() failed with error %d\n", r); 861 goto fail; 862 } 863 864 if (!kvm->cfg.guest_name) { 865 if (kvm->cfg.custom_rootfs) { 866 kvm->cfg.guest_name = kvm->cfg.custom_rootfs_name; 867 } else { 868 sprintf(default_name, "guest-%u", getpid()); 869 kvm->cfg.guest_name = default_name; 870 } 871 } 872 873 r = kvm__init(kvm); 874 if (r) 875 goto fail; 876 877 r = ioeventfd__init(kvm); 878 if (r < 0) { 879 pr_err("ioeventfd__init() failed with error %d\n", r); 880 goto fail; 881 } 882 883 r = kvm_cpu__init(kvm); 884 if (r < 0) { 885 pr_err("kvm_cpu__init() failed with error %d\n", r); 886 goto fail; 887 } 888 889 r = irq__init(kvm); 890 if (r < 0) { 891 pr_err("irq__init() failed with error %d\n", r); 892 goto fail; 893 } 894 895 r = pci__init(kvm); 896 if (r < 0) { 897 pr_err("pci__init() failed with error %d\n", r); 898 goto fail; 899 } 900 901 r = ioport__init(kvm); 902 if (r < 0) { 903 pr_err("ioport__init() failed with error %d\n", r); 904 goto fail; 905 } 906 907 /* 908 * vidmode should be either specified 909 * either set by default 910 */ 911 if (kvm->cfg.vnc || kvm->cfg.sdl) { 912 if (vidmode == -1) 913 vidmode = 0x312; 914 } else { 915 vidmode = 0; 916 } 917 918 memset(real_cmdline, 0, sizeof(real_cmdline)); 919 kvm__arch_set_cmdline(real_cmdline, kvm->cfg.vnc || kvm->cfg.sdl); 920 921 if (strlen(real_cmdline) > 0) 922 strcat(real_cmdline, " "); 923 924 if (kvm->cfg.kernel_cmdline) 925 strlcat(real_cmdline, kvm->cfg.kernel_cmdline, sizeof(real_cmdline)); 926 927 if (!kvm->cfg.using_rootfs && !kvm->cfg.disk_image[0].filename && !kvm->cfg.initrd_filename) { 928 char tmp[PATH_MAX]; 929 930 kvm_setup_create_new(kvm->cfg.custom_rootfs_name); 931 kvm_setup_resolv(kvm->cfg.custom_rootfs_name); 932 933 snprintf(tmp, PATH_MAX, "%s%s", kvm__get_dir(), "default"); 934 if (virtio_9p__register(kvm, tmp, "/dev/root") < 0) 935 die("Unable to initialize virtio 9p"); 936 if (virtio_9p__register(kvm, "/", "hostfs") < 0) 937 die("Unable to initialize virtio 9p"); 938 kvm->cfg.using_rootfs = kvm->cfg.custom_rootfs = 1; 939 } 940 941 if (kvm->cfg.using_rootfs) { 942 strcat(real_cmdline, " root=/dev/root rw rootflags=rw,trans=virtio,version=9p2000.L rootfstype=9p"); 943 if (kvm->cfg.custom_rootfs) { 944 kvm_run_set_sandbox(); 945 946 strcat(real_cmdline, " init=/virt/init"); 947 948 if (!kvm->cfg.no_dhcp) 949 strcat(real_cmdline, " ip=dhcp"); 950 if (kvm_setup_guest_init()) 951 die("Failed to setup init for guest."); 952 } 953 } else if (!strstr(real_cmdline, "root=")) { 954 strlcat(real_cmdline, " root=/dev/vda rw ", sizeof(real_cmdline)); 955 } 956 957 r = disk_image__init(kvm); 958 if (r < 0) { 959 pr_err("disk_image__init() failed with error %d\n", r); 960 goto fail; 961 } 962 963 printf(" # %s run -k %s -m %Lu -c %d --name %s\n", KVM_BINARY_NAME, 964 kvm->cfg.kernel_filename, kvm->cfg.ram_size / 1024 / 1024, kvm->cfg.nrcpus, kvm->cfg.guest_name); 965 966 if (!kvm->cfg.firmware_filename) { 967 if (!kvm__load_kernel(kvm, kvm->cfg.kernel_filename, 968 kvm->cfg.initrd_filename, real_cmdline, vidmode)) 969 die("unable to load kernel %s", kvm->cfg.kernel_filename); 970 971 kvm->vmlinux = kvm->cfg.vmlinux_filename; 972 r = symbol_init(kvm); 973 if (r < 0) 974 pr_debug("symbol_init() failed with error %d\n", r); 975 } 976 977 ioport__setup_arch(); 978 979 r = rtc__init(kvm); 980 if (r < 0) { 981 pr_err("rtc__init() failed with error %d\n", r); 982 goto fail; 983 } 984 985 r = serial8250__init(kvm); 986 if (r < 0) { 987 pr_err("serial__init() failed with error %d\n", r); 988 goto fail; 989 } 990 991 r = virtio_blk__init(kvm); 992 if (r < 0) { 993 pr_err("virtio_blk__init() failed with error %d\n", r); 994 goto fail; 995 } 996 997 r = virtio_scsi_init(kvm); 998 if (r < 0) { 999 pr_err("virtio_scsi_init() failed with error %d\n", r); 1000 goto fail; 1001 } 1002 1003 r = virtio_console__init(kvm); 1004 if (r < 0) { 1005 pr_err("virtio_console__init() failed with error %d\n", r); 1006 goto fail; 1007 } 1008 1009 r = virtio_rng__init(kvm); 1010 if (r < 0) { 1011 pr_err("virtio_rng__init() failed with error %d\n", r); 1012 goto fail; 1013 } 1014 1015 r = virtio_bln__init(kvm); 1016 if (r < 0) { 1017 pr_err("virtio_rng__init() failed with error %d\n", r); 1018 goto fail; 1019 } 1020 1021 if (!kvm->cfg.network) 1022 kvm->cfg.network = DEFAULT_NETWORK; 1023 1024 virtio_9p__init(kvm); 1025 1026 for (i = 0; i < kvm->cfg.num_net_devices; i++) { 1027 kvm->cfg.net_params[i].kvm = kvm; 1028 virtio_net__init(&kvm->cfg.net_params[i]); 1029 } 1030 1031 if (kvm->cfg.num_net_devices == 0 && kvm->cfg.no_net == 0) { 1032 struct virtio_net_params net_params; 1033 1034 net_params = (struct virtio_net_params) { 1035 .guest_ip = kvm->cfg.guest_ip, 1036 .host_ip = kvm->cfg.host_ip, 1037 .kvm = kvm, 1038 .script = kvm->cfg.script, 1039 .mode = NET_MODE_USER, 1040 }; 1041 str_to_mac(kvm->cfg.guest_mac, net_params.guest_mac); 1042 str_to_mac(kvm->cfg.host_mac, net_params.host_mac); 1043 1044 virtio_net__init(&net_params); 1045 } 1046 1047 kvm__init_ram(kvm); 1048 1049 #ifdef CONFIG_X86 1050 kbd__init(kvm); 1051 #endif 1052 1053 r = pci_shmem__init(kvm); 1054 if (r < 0) { 1055 pr_err("pci_shmem__init() failed with error %d\n", r); 1056 goto fail; 1057 } 1058 1059 if (kvm->cfg.vnc || kvm->cfg.sdl) { 1060 fb = vesa__init(kvm); 1061 if (IS_ERR(fb)) { 1062 pr_err("vesa__init() failed with error %ld\n", PTR_ERR(fb)); 1063 goto fail; 1064 } 1065 } 1066 1067 if (kvm->cfg.vnc && fb) { 1068 r = vnc__init(fb); 1069 if (r < 0) { 1070 pr_err("vnc__init() failed with error %d\n", r); 1071 goto fail; 1072 } 1073 } 1074 1075 if (kvm->cfg.sdl && fb) { 1076 sdl__init(fb); 1077 if (r < 0) { 1078 pr_err("sdl__init() failed with error %d\n", r); 1079 goto fail; 1080 } 1081 } 1082 1083 r = fb__init(kvm); 1084 if (r < 0) { 1085 pr_err("fb__init() failed with error %d\n", r); 1086 goto fail; 1087 } 1088 1089 /* 1090 * Device init all done; firmware init must 1091 * come after this (it may set up device trees etc.) 1092 */ 1093 1094 r = kvm_timer__init(kvm); 1095 if (r < 0) { 1096 pr_err("kvm_timer__init() failed with error %d\n", r); 1097 goto fail; 1098 } 1099 1100 if (kvm->cfg.firmware_filename) { 1101 if (!kvm__load_firmware(kvm, kvm->cfg.firmware_filename)) 1102 die("unable to load firmware image %s: %s", kvm->cfg.firmware_filename, strerror(errno)); 1103 } else { 1104 kvm__arch_setup_firmware(kvm); 1105 if (r < 0) { 1106 pr_err("kvm__arch_setup_firmware() failed with error %d\n", r); 1107 goto fail; 1108 } 1109 } 1110 1111 r = thread_pool__init(kvm); 1112 if (r < 0) { 1113 pr_err("thread_pool__init() failed with error %d\n", r); 1114 goto fail; 1115 } 1116 1117 fail: 1118 return r; 1119 } 1120 1121 static int kvm_cmd_run_work(void) 1122 { 1123 int i; 1124 void *ret = NULL; 1125 1126 for (i = 0; i < kvm->nrcpus; i++) { 1127 if (pthread_create(&kvm->cpus[i]->thread, NULL, kvm_cpu_thread, kvm->cpus[i]) != 0) 1128 die("unable to create KVM VCPU thread"); 1129 } 1130 1131 /* Only VCPU #0 is going to exit by itself when shutting down */ 1132 return pthread_join(kvm->cpus[0]->thread, &ret); 1133 } 1134 1135 static void kvm_cmd_run_exit(int guest_ret) 1136 { 1137 int r = 0; 1138 1139 compat__print_all_messages(); 1140 1141 r = kvm_cpu__exit(kvm); 1142 if (r < 0) 1143 pr_warning("kvm_cpu__exit() failed with error %d\n", r); 1144 1145 r = symbol_exit(kvm); 1146 if (r < 0) 1147 pr_warning("symbol_exit() failed with error %d\n", r); 1148 1149 r = irq__exit(kvm); 1150 if (r < 0) 1151 pr_warning("irq__exit() failed with error %d\n", r); 1152 1153 r = kvm_timer__exit(kvm); 1154 if (r < 0) 1155 pr_warning("kvm_timer__exit() failed with error %d\n", r); 1156 1157 r = fb__exit(kvm); 1158 if (r < 0) 1159 pr_warning("kvm_timer__exit() failed with error %d\n", r); 1160 1161 r = virtio_scsi_exit(kvm); 1162 if (r < 0) 1163 pr_warning("virtio_scsi_exit() failed with error %d\n", r); 1164 1165 r = virtio_blk__exit(kvm); 1166 if (r < 0) 1167 pr_warning("virtio_blk__exit() failed with error %d\n", r); 1168 1169 r = virtio_rng__exit(kvm); 1170 if (r < 0) 1171 pr_warning("virtio_rng__exit() failed with error %d\n", r); 1172 1173 r = virtio_bln__exit(kvm); 1174 if (r < 0) 1175 pr_warning("virtio_bln__exit() failed with error %d\n", r); 1176 1177 r = virtio_console__exit(kvm); 1178 if (r < 0) 1179 pr_warning("virtio_console__exit() failed with error %d\n", r); 1180 1181 r = pci_shmem__exit(kvm); 1182 if (r < 0) 1183 pr_warning("pci_shmem__exit() failed with error %d\n", r); 1184 1185 r = disk_image__exit(kvm); 1186 if (r < 0) 1187 pr_warning("disk_image__exit() failed with error %d\n", r); 1188 1189 r = serial8250__exit(kvm); 1190 if (r < 0) 1191 pr_warning("serial8250__exit() failed with error %d\n", r); 1192 1193 r = rtc__exit(kvm); 1194 if (r < 0) 1195 pr_warning("rtc__exit() failed with error %d\n", r); 1196 1197 r = kvm__arch_free_firmware(kvm); 1198 if (r < 0) 1199 pr_warning("kvm__arch_free_firmware() failed with error %d\n", r); 1200 1201 r = ioport__exit(kvm); 1202 if (r < 0) 1203 pr_warning("ioport__exit() failed with error %d\n", r); 1204 1205 r = ioeventfd__exit(kvm); 1206 if (r < 0) 1207 pr_warning("ioeventfd__exit() failed with error %d\n", r); 1208 1209 r = pci__exit(kvm); 1210 if (r < 0) 1211 pr_warning("pci__exit() failed with error %d\n", r); 1212 1213 r = term_exit(kvm); 1214 if (r < 0) 1215 pr_warning("pci__exit() failed with error %d\n", r); 1216 1217 r = thread_pool__exit(kvm); 1218 if (r < 0) 1219 pr_warning("thread_pool__exit() failed with error %d\n", r); 1220 1221 r = kvm__exit(kvm); 1222 if (r < 0) 1223 pr_warning("pci__exit() failed with error %d\n", r); 1224 1225 if (guest_ret == 0) 1226 printf("\n # KVM session ended normally.\n"); 1227 } 1228 1229 int kvm_cmd_run(int argc, const char **argv, const char *prefix) 1230 { 1231 int r, ret = -EFAULT; 1232 1233 r = kvm_cmd_run_init(argc, argv); 1234 if (r < 0) 1235 return r; 1236 1237 ret = kvm_cmd_run_work(); 1238 kvm_cmd_run_exit(ret); 1239 1240 return ret; 1241 } 1242