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 #include <linux/err.h> 39 40 #include <sys/utsname.h> 41 #include <sys/types.h> 42 #include <sys/stat.h> 43 #include <termios.h> 44 #include <signal.h> 45 #include <stdlib.h> 46 #include <string.h> 47 #include <unistd.h> 48 #include <ctype.h> 49 #include <stdio.h> 50 51 #define DEFAULT_KVM_DEV "/dev/kvm" 52 #define DEFAULT_CONSOLE "serial" 53 #define DEFAULT_NETWORK "user" 54 #define DEFAULT_HOST_ADDR "192.168.33.1" 55 #define DEFAULT_GUEST_ADDR "192.168.33.15" 56 #define DEFAULT_GUEST_MAC "02:15:15:15:15:15" 57 #define DEFAULT_HOST_MAC "02:01:01:01:01:01" 58 #define DEFAULT_SCRIPT "none" 59 const char *DEFAULT_SANDBOX_FILENAME = "guest/sandbox.sh"; 60 61 #define MB_SHIFT (20) 62 #define KB_SHIFT (10) 63 #define GB_SHIFT (30) 64 #define MIN_RAM_SIZE_MB (64ULL) 65 #define MIN_RAM_SIZE_BYTE (MIN_RAM_SIZE_MB << MB_SHIFT) 66 67 struct kvm *kvm; 68 struct kvm_cpu **kvm_cpus; 69 __thread struct kvm_cpu *current_kvm_cpu; 70 71 static u64 ram_size; 72 static u8 image_count; 73 static u8 num_net_devices; 74 static bool virtio_rng; 75 static const char *kernel_cmdline; 76 static const char *kernel_filename; 77 static const char *vmlinux_filename; 78 static const char *initrd_filename; 79 static const char *firmware_filename; 80 static const char *image_filename[MAX_DISK_IMAGES]; 81 static const char *console; 82 static const char *dev; 83 static const char *network; 84 static const char *host_ip; 85 static const char *guest_ip; 86 static const char *guest_mac; 87 static const char *host_mac; 88 static const char *script; 89 static const char *guest_name; 90 static const char *sandbox; 91 static const char *hugetlbfs_path; 92 static const char *custom_rootfs_name = "default"; 93 static struct virtio_net_params *net_params; 94 static bool single_step; 95 static bool readonly_image[MAX_DISK_IMAGES]; 96 static bool vnc; 97 static bool sdl; 98 static bool balloon; 99 static bool using_rootfs; 100 static bool custom_rootfs; 101 static bool no_net; 102 static bool no_dhcp; 103 extern bool ioport_debug; 104 static int kvm_run_wrapper; 105 extern int active_console; 106 extern int debug_iodelay; 107 108 bool do_debug_print = false; 109 110 static int nrcpus; 111 static int vidmode = -1; 112 113 static const char * const run_usage[] = { 114 "lkvm run [<options>] [<kernel image>]", 115 NULL 116 }; 117 118 enum { 119 KVM_RUN_DEFAULT, 120 KVM_RUN_SANDBOX, 121 }; 122 123 void kvm_run_set_wrapper_sandbox(void) 124 { 125 kvm_run_wrapper = KVM_RUN_SANDBOX; 126 } 127 128 static int img_name_parser(const struct option *opt, const char *arg, int unset) 129 { 130 char *sep; 131 struct stat st; 132 char path[PATH_MAX]; 133 134 if (stat(arg, &st) == 0 && 135 S_ISDIR(st.st_mode)) { 136 char tmp[PATH_MAX]; 137 138 if (using_rootfs) 139 die("Please use only one rootfs directory atmost"); 140 141 if (realpath(arg, tmp) == 0 || 142 virtio_9p__register(kvm, tmp, "/dev/root") < 0) 143 die("Unable to initialize virtio 9p"); 144 using_rootfs = 1; 145 return 0; 146 } 147 148 snprintf(path, PATH_MAX, "%s%s", kvm__get_dir(), arg); 149 150 if (stat(path, &st) == 0 && 151 S_ISDIR(st.st_mode)) { 152 char tmp[PATH_MAX]; 153 154 if (using_rootfs) 155 die("Please use only one rootfs directory atmost"); 156 157 if (realpath(path, tmp) == 0 || 158 virtio_9p__register(kvm, tmp, "/dev/root") < 0) 159 die("Unable to initialize virtio 9p"); 160 if (virtio_9p__register(kvm, "/", "hostfs") < 0) 161 die("Unable to initialize virtio 9p"); 162 kvm_setup_resolv(arg); 163 using_rootfs = custom_rootfs = 1; 164 custom_rootfs_name = arg; 165 return 0; 166 } 167 168 if (image_count >= MAX_DISK_IMAGES) 169 die("Currently only 4 images are supported"); 170 171 image_filename[image_count] = arg; 172 sep = strstr(arg, ","); 173 if (sep) { 174 if (strcmp(sep + 1, "ro") == 0) 175 readonly_image[image_count] = 1; 176 *sep = 0; 177 } 178 179 image_count++; 180 181 return 0; 182 } 183 184 static int virtio_9p_rootdir_parser(const struct option *opt, const char *arg, int unset) 185 { 186 char *tag_name; 187 char tmp[PATH_MAX]; 188 189 /* 190 * 9p dir can be of the form dirname,tag_name or 191 * just dirname. In the later case we use the 192 * default tag name 193 */ 194 tag_name = strstr(arg, ","); 195 if (tag_name) { 196 *tag_name = '\0'; 197 tag_name++; 198 } 199 if (realpath(arg, tmp)) { 200 if (virtio_9p__register(kvm, tmp, tag_name) < 0) 201 die("Unable to initialize virtio 9p"); 202 } else 203 die("Failed resolving 9p path"); 204 return 0; 205 } 206 207 static int tty_parser(const struct option *opt, const char *arg, int unset) 208 { 209 int tty = atoi(arg); 210 211 term_set_tty(tty); 212 213 return 0; 214 } 215 216 static inline void str_to_mac(const char *str, char *mac) 217 { 218 sscanf(str, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", 219 mac, mac+1, mac+2, mac+3, mac+4, mac+5); 220 } 221 static int set_net_param(struct virtio_net_params *p, const char *param, 222 const char *val) 223 { 224 if (strcmp(param, "guest_mac") == 0) { 225 str_to_mac(val, p->guest_mac); 226 } else if (strcmp(param, "mode") == 0) { 227 if (!strncmp(val, "user", 4)) { 228 int i; 229 230 for (i = 0; i < num_net_devices; i++) 231 if (net_params[i].mode == NET_MODE_USER) 232 die("Only one usermode network device allowed at a time"); 233 p->mode = NET_MODE_USER; 234 } else if (!strncmp(val, "tap", 3)) { 235 p->mode = NET_MODE_TAP; 236 } else if (!strncmp(val, "none", 4)) { 237 no_net = 1; 238 return -1; 239 } else 240 die("Unkown network mode %s, please use user, tap or none", network); 241 } else if (strcmp(param, "script") == 0) { 242 p->script = strdup(val); 243 } else if (strcmp(param, "guest_ip") == 0) { 244 p->guest_ip = strdup(val); 245 } else if (strcmp(param, "host_ip") == 0) { 246 p->host_ip = strdup(val); 247 } else if (strcmp(param, "vhost") == 0) { 248 p->vhost = atoi(val); 249 } else if (strcmp(param, "fd") == 0) { 250 p->fd = atoi(val); 251 } 252 253 return 0; 254 } 255 256 static int netdev_parser(const struct option *opt, const char *arg, int unset) 257 { 258 struct virtio_net_params p; 259 char *buf = NULL, *cmd = NULL, *cur = NULL; 260 bool on_cmd = true; 261 262 if (arg) { 263 buf = strdup(arg); 264 if (buf == NULL) 265 die("Failed allocating new net buffer"); 266 cur = strtok(buf, ",="); 267 } 268 269 p = (struct virtio_net_params) { 270 .guest_ip = DEFAULT_GUEST_ADDR, 271 .host_ip = DEFAULT_HOST_ADDR, 272 .script = DEFAULT_SCRIPT, 273 .mode = NET_MODE_TAP, 274 }; 275 276 str_to_mac(DEFAULT_GUEST_MAC, p.guest_mac); 277 p.guest_mac[5] += num_net_devices; 278 279 while (cur) { 280 if (on_cmd) { 281 cmd = cur; 282 } else { 283 if (set_net_param(&p, cmd, cur) < 0) 284 goto done; 285 } 286 on_cmd = !on_cmd; 287 288 cur = strtok(NULL, ",="); 289 }; 290 291 num_net_devices++; 292 293 net_params = realloc(net_params, num_net_devices * sizeof(*net_params)); 294 if (net_params == NULL) 295 die("Failed adding new network device"); 296 297 net_params[num_net_devices - 1] = p; 298 299 done: 300 free(buf); 301 return 0; 302 } 303 304 static int shmem_parser(const struct option *opt, const char *arg, int unset) 305 { 306 const u64 default_size = SHMEM_DEFAULT_SIZE; 307 const u64 default_phys_addr = SHMEM_DEFAULT_ADDR; 308 const char *default_handle = SHMEM_DEFAULT_HANDLE; 309 struct shmem_info *si = malloc(sizeof(struct shmem_info)); 310 u64 phys_addr; 311 u64 size; 312 char *handle = NULL; 313 int create = 0; 314 const char *p = arg; 315 char *next; 316 int base = 10; 317 int verbose = 0; 318 319 const int skip_pci = strlen("pci:"); 320 if (verbose) 321 pr_info("shmem_parser(%p,%s,%d)", opt, arg, unset); 322 /* parse out optional addr family */ 323 if (strcasestr(p, "pci:")) { 324 p += skip_pci; 325 } else if (strcasestr(p, "mem:")) { 326 die("I can't add to E820 map yet.\n"); 327 } 328 /* parse out physical addr */ 329 base = 10; 330 if (strcasestr(p, "0x")) 331 base = 16; 332 phys_addr = strtoll(p, &next, base); 333 if (next == p && phys_addr == 0) { 334 pr_info("shmem: no physical addr specified, using default."); 335 phys_addr = default_phys_addr; 336 } 337 if (*next != ':' && *next != '\0') 338 die("shmem: unexpected chars after phys addr.\n"); 339 if (*next == '\0') 340 p = next; 341 else 342 p = next + 1; 343 /* parse out size */ 344 base = 10; 345 if (strcasestr(p, "0x")) 346 base = 16; 347 size = strtoll(p, &next, base); 348 if (next == p && size == 0) { 349 pr_info("shmem: no size specified, using default."); 350 size = default_size; 351 } 352 /* look for [KMGkmg][Bb]* uses base 2. */ 353 int skip_B = 0; 354 if (strspn(next, "KMGkmg")) { /* might have a prefix */ 355 if (*(next + 1) == 'B' || *(next + 1) == 'b') 356 skip_B = 1; 357 switch (*next) { 358 case 'K': 359 case 'k': 360 size = size << KB_SHIFT; 361 break; 362 case 'M': 363 case 'm': 364 size = size << MB_SHIFT; 365 break; 366 case 'G': 367 case 'g': 368 size = size << GB_SHIFT; 369 break; 370 default: 371 die("shmem: bug in detecting size prefix."); 372 break; 373 } 374 next += 1 + skip_B; 375 } 376 if (*next != ':' && *next != '\0') { 377 die("shmem: unexpected chars after phys size. <%c><%c>\n", 378 *next, *p); 379 } 380 if (*next == '\0') 381 p = next; 382 else 383 p = next + 1; 384 /* parse out optional shmem handle */ 385 const int skip_handle = strlen("handle="); 386 next = strcasestr(p, "handle="); 387 if (*p && next) { 388 if (p != next) 389 die("unexpected chars before handle\n"); 390 p += skip_handle; 391 next = strchrnul(p, ':'); 392 if (next - p) { 393 handle = malloc(next - p + 1); 394 strncpy(handle, p, next - p); 395 handle[next - p] = '\0'; /* just in case. */ 396 } 397 if (*next == '\0') 398 p = next; 399 else 400 p = next + 1; 401 } 402 /* parse optional create flag to see if we should create shm seg. */ 403 if (*p && strcasestr(p, "create")) { 404 create = 1; 405 p += strlen("create"); 406 } 407 if (*p != '\0') 408 die("shmem: unexpected trailing chars\n"); 409 if (handle == NULL) { 410 handle = malloc(strlen(default_handle) + 1); 411 strcpy(handle, default_handle); 412 } 413 if (verbose) { 414 pr_info("shmem: phys_addr = %llx", phys_addr); 415 pr_info("shmem: size = %llx", size); 416 pr_info("shmem: handle = %s", handle); 417 pr_info("shmem: create = %d", create); 418 } 419 420 si->phys_addr = phys_addr; 421 si->size = size; 422 si->handle = handle; 423 si->create = create; 424 pci_shmem__register_mem(si); /* ownership of si, etc. passed on. */ 425 return 0; 426 } 427 428 static const struct option options[] = { 429 OPT_GROUP("Basic options:"), 430 OPT_STRING('\0', "name", &guest_name, "guest name", 431 "A name for the guest"), 432 OPT_INTEGER('c', "cpus", &nrcpus, "Number of CPUs"), 433 OPT_U64('m', "mem", &ram_size, "Virtual machine memory size in MiB."), 434 OPT_CALLBACK('\0', "shmem", NULL, 435 "[pci:]<addr>:<size>[:handle=<handle>][:create]", 436 "Share host shmem with guest via pci device", 437 shmem_parser), 438 OPT_CALLBACK('d', "disk", NULL, "image or rootfs_dir", "Disk image or rootfs directory", img_name_parser), 439 OPT_BOOLEAN('\0', "balloon", &balloon, "Enable virtio balloon"), 440 OPT_BOOLEAN('\0', "vnc", &vnc, "Enable VNC framebuffer"), 441 OPT_BOOLEAN('\0', "sdl", &sdl, "Enable SDL framebuffer"), 442 OPT_BOOLEAN('\0', "rng", &virtio_rng, "Enable virtio Random Number Generator"), 443 OPT_CALLBACK('\0', "9p", NULL, "dir_to_share,tag_name", 444 "Enable virtio 9p to share files between host and guest", virtio_9p_rootdir_parser), 445 OPT_STRING('\0', "console", &console, "serial, virtio or hv", 446 "Console to use"), 447 OPT_STRING('\0', "dev", &dev, "device_file", "KVM device file"), 448 OPT_CALLBACK('\0', "tty", NULL, "tty id", 449 "Remap guest TTY into a pty on the host", 450 tty_parser), 451 OPT_STRING('\0', "sandbox", &sandbox, "script", 452 "Run this script when booting into custom rootfs"), 453 OPT_STRING('\0', "hugetlbfs", &hugetlbfs_path, "path", "Hugetlbfs path"), 454 455 OPT_GROUP("Kernel options:"), 456 OPT_STRING('k', "kernel", &kernel_filename, "kernel", 457 "Kernel to boot in virtual machine"), 458 OPT_STRING('i', "initrd", &initrd_filename, "initrd", 459 "Initial RAM disk image"), 460 OPT_STRING('p', "params", &kernel_cmdline, "params", 461 "Kernel command line arguments"), 462 OPT_STRING('f', "firmware", &firmware_filename, "firmware", 463 "Firmware image to boot in virtual machine"), 464 465 OPT_GROUP("Networking options:"), 466 OPT_CALLBACK_DEFAULT('n', "network", NULL, "network params", 467 "Create a new guest NIC", 468 netdev_parser, NULL), 469 OPT_BOOLEAN('\0', "no-dhcp", &no_dhcp, "Disable kernel DHCP in rootfs mode"), 470 471 OPT_GROUP("BIOS options:"), 472 OPT_INTEGER('\0', "vidmode", &vidmode, 473 "Video mode"), 474 475 OPT_GROUP("Debug options:"), 476 OPT_BOOLEAN('\0', "debug", &do_debug_print, 477 "Enable debug messages"), 478 OPT_BOOLEAN('\0', "debug-single-step", &single_step, 479 "Enable single stepping"), 480 OPT_BOOLEAN('\0', "debug-ioport", &ioport_debug, 481 "Enable ioport debugging"), 482 OPT_INTEGER('\0', "debug-iodelay", &debug_iodelay, 483 "Delay IO by millisecond"), 484 OPT_END() 485 }; 486 487 /* 488 * Serialize debug printout so that the output of multiple vcpus does not 489 * get mixed up: 490 */ 491 static int printout_done; 492 493 static void handle_sigusr1(int sig) 494 { 495 struct kvm_cpu *cpu = current_kvm_cpu; 496 int fd = kvm_cpu__get_debug_fd(); 497 498 if (!cpu || cpu->needs_nmi) 499 return; 500 501 dprintf(fd, "\n #\n # vCPU #%ld's dump:\n #\n", cpu->cpu_id); 502 kvm_cpu__show_registers(cpu); 503 kvm_cpu__show_code(cpu); 504 kvm_cpu__show_page_tables(cpu); 505 fflush(stdout); 506 printout_done = 1; 507 mb(); 508 } 509 510 /* Pause/resume the guest using SIGUSR2 */ 511 static int is_paused; 512 513 static void handle_pause(int fd, u32 type, u32 len, u8 *msg) 514 { 515 if (WARN_ON(len)) 516 return; 517 518 if (type == KVM_IPC_RESUME && is_paused) { 519 kvm->vm_state = KVM_VMSTATE_RUNNING; 520 kvm__continue(); 521 } else if (type == KVM_IPC_PAUSE && !is_paused) { 522 kvm->vm_state = KVM_VMSTATE_PAUSED; 523 kvm__pause(); 524 } else { 525 return; 526 } 527 528 is_paused = !is_paused; 529 } 530 531 static void handle_vmstate(int fd, u32 type, u32 len, u8 *msg) 532 { 533 int r = 0; 534 535 if (type == KVM_IPC_VMSTATE) 536 r = write(fd, &kvm->vm_state, sizeof(kvm->vm_state)); 537 538 if (r < 0) 539 pr_warning("Failed sending VMSTATE"); 540 } 541 542 static void handle_debug(int fd, u32 type, u32 len, u8 *msg) 543 { 544 int i; 545 struct debug_cmd_params *params; 546 u32 dbg_type; 547 u32 vcpu; 548 549 if (WARN_ON(type != KVM_IPC_DEBUG || len != sizeof(*params))) 550 return; 551 552 params = (void *)msg; 553 dbg_type = params->dbg_type; 554 vcpu = params->cpu; 555 556 if (dbg_type & KVM_DEBUG_CMD_TYPE_NMI) { 557 if ((int)vcpu >= kvm->nrcpus) 558 return; 559 560 kvm_cpus[vcpu]->needs_nmi = 1; 561 pthread_kill(kvm_cpus[vcpu]->thread, SIGUSR1); 562 } 563 564 if (!(dbg_type & KVM_DEBUG_CMD_TYPE_DUMP)) 565 return; 566 567 for (i = 0; i < nrcpus; i++) { 568 struct kvm_cpu *cpu = kvm_cpus[i]; 569 570 if (!cpu) 571 continue; 572 573 printout_done = 0; 574 575 kvm_cpu__set_debug_fd(fd); 576 pthread_kill(cpu->thread, SIGUSR1); 577 /* 578 * Wait for the vCPU to dump state before signalling 579 * the next thread. Since this is debug code it does 580 * not matter that we are burning CPU time a bit: 581 */ 582 while (!printout_done) 583 mb(); 584 } 585 586 close(fd); 587 588 serial8250__inject_sysrq(kvm); 589 } 590 591 static void handle_sigalrm(int sig) 592 { 593 kvm__arch_periodic_poll(kvm); 594 } 595 596 static void handle_stop(int fd, u32 type, u32 len, u8 *msg) 597 { 598 if (WARN_ON(type != KVM_IPC_STOP || len)) 599 return; 600 601 kvm_cpu__reboot(); 602 } 603 604 static void *kvm_cpu_thread(void *arg) 605 { 606 current_kvm_cpu = arg; 607 608 if (kvm_cpu__start(current_kvm_cpu)) 609 goto panic_kvm; 610 611 return (void *) (intptr_t) 0; 612 613 panic_kvm: 614 fprintf(stderr, "KVM exit reason: %u (\"%s\")\n", 615 current_kvm_cpu->kvm_run->exit_reason, 616 kvm_exit_reasons[current_kvm_cpu->kvm_run->exit_reason]); 617 if (current_kvm_cpu->kvm_run->exit_reason == KVM_EXIT_UNKNOWN) 618 fprintf(stderr, "KVM exit code: 0x%Lu\n", 619 current_kvm_cpu->kvm_run->hw.hardware_exit_reason); 620 621 kvm_cpu__set_debug_fd(STDOUT_FILENO); 622 kvm_cpu__show_registers(current_kvm_cpu); 623 kvm_cpu__show_code(current_kvm_cpu); 624 kvm_cpu__show_page_tables(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 "../../arch/" BUILD_ARCH "/boot/bzImage", 641 NULL 642 }; 643 644 static const char *default_vmlinux[] = { 645 "vmlinux", 646 "../../../vmlinux", 647 "../../vmlinux", 648 NULL 649 }; 650 651 static void kernel_usage_with_options(void) 652 { 653 const char **k; 654 struct utsname uts; 655 656 fprintf(stderr, "Fatal: could not find default kernel image in:\n"); 657 k = &default_kernels[0]; 658 while (*k) { 659 fprintf(stderr, "\t%s\n", *k); 660 k++; 661 } 662 663 if (uname(&uts) < 0) 664 return; 665 666 k = &host_kernels[0]; 667 while (*k) { 668 if (snprintf(kernel, PATH_MAX, "%s-%s", *k, uts.release) < 0) 669 return; 670 fprintf(stderr, "\t%s\n", kernel); 671 k++; 672 } 673 fprintf(stderr, "\nPlease see '%s run --help' for more options.\n\n", 674 KVM_BINARY_NAME); 675 } 676 677 static u64 host_ram_size(void) 678 { 679 long page_size; 680 long nr_pages; 681 682 nr_pages = sysconf(_SC_PHYS_PAGES); 683 if (nr_pages < 0) { 684 pr_warning("sysconf(_SC_PHYS_PAGES) failed"); 685 return 0; 686 } 687 688 page_size = sysconf(_SC_PAGE_SIZE); 689 if (page_size < 0) { 690 pr_warning("sysconf(_SC_PAGE_SIZE) failed"); 691 return 0; 692 } 693 694 return (nr_pages * page_size) >> MB_SHIFT; 695 } 696 697 /* 698 * If user didn't specify how much memory it wants to allocate for the guest, 699 * avoid filling the whole host RAM. 700 */ 701 #define RAM_SIZE_RATIO 0.8 702 703 static u64 get_ram_size(int nr_cpus) 704 { 705 u64 available; 706 u64 ram_size; 707 708 ram_size = 64 * (nr_cpus + 3); 709 710 available = host_ram_size() * RAM_SIZE_RATIO; 711 if (!available) 712 available = MIN_RAM_SIZE_MB; 713 714 if (ram_size > available) 715 ram_size = available; 716 717 return ram_size; 718 } 719 720 static const char *find_kernel(void) 721 { 722 const char **k; 723 struct stat st; 724 struct utsname uts; 725 726 k = &default_kernels[0]; 727 while (*k) { 728 if (stat(*k, &st) < 0 || !S_ISREG(st.st_mode)) { 729 k++; 730 continue; 731 } 732 strncpy(kernel, *k, PATH_MAX); 733 return kernel; 734 } 735 736 if (uname(&uts) < 0) 737 return NULL; 738 739 k = &host_kernels[0]; 740 while (*k) { 741 if (snprintf(kernel, PATH_MAX, "%s-%s", *k, uts.release) < 0) 742 return NULL; 743 744 if (stat(kernel, &st) < 0 || !S_ISREG(st.st_mode)) { 745 k++; 746 continue; 747 } 748 return kernel; 749 750 } 751 return NULL; 752 } 753 754 static const char *find_vmlinux(void) 755 { 756 const char **vmlinux; 757 758 vmlinux = &default_vmlinux[0]; 759 while (*vmlinux) { 760 struct stat st; 761 762 if (stat(*vmlinux, &st) < 0 || !S_ISREG(st.st_mode)) { 763 vmlinux++; 764 continue; 765 } 766 return *vmlinux; 767 } 768 return NULL; 769 } 770 771 void kvm_run_help(void) 772 { 773 usage_with_options(run_usage, options); 774 } 775 776 static int kvm_custom_stage2(void) 777 { 778 char tmp[PATH_MAX], dst[PATH_MAX], *src; 779 const char *rootfs = custom_rootfs_name; 780 int r; 781 782 src = realpath("guest/init_stage2", NULL); 783 if (src == NULL) 784 return -ENOMEM; 785 786 snprintf(tmp, PATH_MAX, "%s%s/virt/init_stage2", kvm__get_dir(), rootfs); 787 remove(tmp); 788 789 snprintf(dst, PATH_MAX, "/host/%s", src); 790 r = symlink(dst, tmp); 791 free(src); 792 793 return r; 794 } 795 796 static int kvm_run_set_sandbox(void) 797 { 798 const char *guestfs_name = custom_rootfs_name; 799 char path[PATH_MAX], script[PATH_MAX], *tmp; 800 801 snprintf(path, PATH_MAX, "%s%s/virt/sandbox.sh", kvm__get_dir(), guestfs_name); 802 803 remove(path); 804 805 if (sandbox == NULL) 806 return 0; 807 808 tmp = realpath(sandbox, NULL); 809 if (tmp == NULL) 810 return -ENOMEM; 811 812 snprintf(script, PATH_MAX, "/host/%s", tmp); 813 free(tmp); 814 815 return symlink(script, path); 816 } 817 818 static void kvm_write_sandbox_cmd_exactly(int fd, const char *arg) 819 { 820 const char *single_quote; 821 822 if (!*arg) { /* zero length string */ 823 if (write(fd, "''", 2) <= 0) 824 die("Failed writing sandbox script"); 825 return; 826 } 827 828 while (*arg) { 829 single_quote = strchrnul(arg, '\''); 830 831 /* write non-single-quote string as #('string') */ 832 if (arg != single_quote) { 833 if (write(fd, "'", 1) <= 0 || 834 write(fd, arg, single_quote - arg) <= 0 || 835 write(fd, "'", 1) <= 0) 836 die("Failed writing sandbox script"); 837 } 838 839 /* write single quote as #("'") */ 840 if (*single_quote) { 841 if (write(fd, "\"'\"", 3) <= 0) 842 die("Failed writing sandbox script"); 843 } else 844 break; 845 846 arg = single_quote + 1; 847 } 848 } 849 850 static void resolve_program(const char *src, char *dst, size_t len) 851 { 852 struct stat st; 853 int err; 854 855 err = stat(src, &st); 856 857 if (!err && S_ISREG(st.st_mode)) { 858 char resolved_path[PATH_MAX]; 859 860 realpath(src, resolved_path); 861 862 snprintf(dst, len, "/host%s", resolved_path); 863 } else 864 strncpy(dst, src, len); 865 } 866 867 static void kvm_run_write_sandbox_cmd(const char **argv, int argc) 868 { 869 const char script_hdr[] = "#! /bin/bash\n\n"; 870 char program[PATH_MAX]; 871 int fd; 872 873 remove(sandbox); 874 875 fd = open(sandbox, O_RDWR | O_CREAT, 0777); 876 if (fd < 0) 877 die("Failed creating sandbox script"); 878 879 if (write(fd, script_hdr, sizeof(script_hdr) - 1) <= 0) 880 die("Failed writing sandbox script"); 881 882 resolve_program(argv[0], program, PATH_MAX); 883 kvm_write_sandbox_cmd_exactly(fd, program); 884 885 argv++; 886 argc--; 887 888 while (argc) { 889 if (write(fd, " ", 1) <= 0) 890 die("Failed writing sandbox script"); 891 892 kvm_write_sandbox_cmd_exactly(fd, argv[0]); 893 argv++; 894 argc--; 895 } 896 if (write(fd, "\n", 1) <= 0) 897 die("Failed writing sandbox script"); 898 899 close(fd); 900 } 901 902 static int kvm_cmd_run_init(int argc, const char **argv) 903 { 904 static char real_cmdline[2048], default_name[20]; 905 struct framebuffer *fb = NULL; 906 unsigned int nr_online_cpus; 907 int max_cpus, recommended_cpus; 908 int i, r; 909 910 signal(SIGALRM, handle_sigalrm); 911 kvm_ipc__register_handler(KVM_IPC_DEBUG, handle_debug); 912 signal(SIGUSR1, handle_sigusr1); 913 kvm_ipc__register_handler(KVM_IPC_PAUSE, handle_pause); 914 kvm_ipc__register_handler(KVM_IPC_RESUME, handle_pause); 915 kvm_ipc__register_handler(KVM_IPC_STOP, handle_stop); 916 kvm_ipc__register_handler(KVM_IPC_VMSTATE, handle_vmstate); 917 918 nr_online_cpus = sysconf(_SC_NPROCESSORS_ONLN); 919 920 while (argc != 0) { 921 argc = parse_options(argc, argv, options, run_usage, 922 PARSE_OPT_STOP_AT_NON_OPTION | 923 PARSE_OPT_KEEP_DASHDASH); 924 if (argc != 0) { 925 /* Cusrom options, should have been handled elsewhere */ 926 if (strcmp(argv[0], "--") == 0) { 927 if (kvm_run_wrapper == KVM_RUN_SANDBOX) { 928 sandbox = DEFAULT_SANDBOX_FILENAME; 929 kvm_run_write_sandbox_cmd(argv+1, argc-1); 930 break; 931 } 932 } 933 934 if ((kvm_run_wrapper == KVM_RUN_DEFAULT && kernel_filename) || 935 (kvm_run_wrapper == KVM_RUN_SANDBOX && sandbox)) { 936 fprintf(stderr, "Cannot handle parameter: " 937 "%s\n", argv[0]); 938 usage_with_options(run_usage, options); 939 return EINVAL; 940 } 941 if (kvm_run_wrapper == KVM_RUN_SANDBOX) { 942 /* 943 * first unhandled parameter is treated as 944 * sandbox command 945 */ 946 sandbox = DEFAULT_SANDBOX_FILENAME; 947 kvm_run_write_sandbox_cmd(argv, argc); 948 } else { 949 /* 950 * first unhandled parameter is treated as a kernel 951 * image 952 */ 953 kernel_filename = argv[0]; 954 } 955 argv++; 956 argc--; 957 } 958 959 } 960 961 if (!kernel_filename) 962 kernel_filename = find_kernel(); 963 964 if (!kernel_filename) { 965 kernel_usage_with_options(); 966 return EINVAL; 967 } 968 969 vmlinux_filename = find_vmlinux(); 970 971 if (nrcpus == 0) 972 nrcpus = nr_online_cpus; 973 974 if (!ram_size) 975 ram_size = get_ram_size(nrcpus); 976 977 if (ram_size < MIN_RAM_SIZE_MB) 978 die("Not enough memory specified: %lluMB (min %lluMB)", ram_size, MIN_RAM_SIZE_MB); 979 980 if (ram_size > host_ram_size()) 981 pr_warning("Guest memory size %lluMB exceeds host physical RAM size %lluMB", ram_size, host_ram_size()); 982 983 ram_size <<= MB_SHIFT; 984 985 if (!dev) 986 dev = DEFAULT_KVM_DEV; 987 988 if (!console) 989 console = DEFAULT_CONSOLE; 990 991 if (!strncmp(console, "virtio", 6)) 992 active_console = CONSOLE_VIRTIO; 993 else if (!strncmp(console, "serial", 6)) 994 active_console = CONSOLE_8250; 995 else if (!strncmp(console, "hv", 2)) 996 active_console = CONSOLE_HV; 997 else 998 pr_warning("No console!"); 999 1000 if (!host_ip) 1001 host_ip = DEFAULT_HOST_ADDR; 1002 1003 if (!guest_ip) 1004 guest_ip = DEFAULT_GUEST_ADDR; 1005 1006 if (!guest_mac) 1007 guest_mac = DEFAULT_GUEST_MAC; 1008 1009 if (!host_mac) 1010 host_mac = DEFAULT_HOST_MAC; 1011 1012 if (!script) 1013 script = DEFAULT_SCRIPT; 1014 1015 term_init(); 1016 1017 if (!guest_name) { 1018 if (custom_rootfs) { 1019 guest_name = custom_rootfs_name; 1020 } else { 1021 sprintf(default_name, "guest-%u", getpid()); 1022 guest_name = default_name; 1023 } 1024 } 1025 1026 kvm = kvm__init(dev, hugetlbfs_path, ram_size, guest_name); 1027 if (IS_ERR(kvm)) { 1028 r = PTR_ERR(kvm); 1029 goto fail; 1030 } 1031 1032 kvm->single_step = single_step; 1033 1034 r = ioeventfd__init(kvm); 1035 if (r < 0) { 1036 pr_err("ioeventfd__init() failed with error %d\n", r); 1037 goto fail; 1038 } 1039 1040 max_cpus = kvm__max_cpus(kvm); 1041 recommended_cpus = kvm__recommended_cpus(kvm); 1042 1043 if (nrcpus > max_cpus) { 1044 printf(" # Limit the number of CPUs to %d\n", max_cpus); 1045 nrcpus = max_cpus; 1046 } else if (nrcpus > recommended_cpus) { 1047 printf(" # Warning: The maximum recommended amount of VCPUs" 1048 " is %d\n", recommended_cpus); 1049 } 1050 1051 kvm->nrcpus = nrcpus; 1052 1053 /* Alloc one pointer too many, so array ends up 0-terminated */ 1054 kvm_cpus = calloc(nrcpus + 1, sizeof(void *)); 1055 if (!kvm_cpus) 1056 die("Couldn't allocate array for %d CPUs", nrcpus); 1057 1058 r = irq__init(kvm); 1059 if (r < 0) { 1060 pr_err("irq__init() failed with error %d\n", r); 1061 goto fail; 1062 } 1063 1064 r = pci__init(kvm); 1065 if (r < 0) { 1066 pr_err("pci__init() failed with error %d\n", r); 1067 goto fail; 1068 } 1069 1070 r = ioport__init(kvm); 1071 if (r < 0) { 1072 pr_err("ioport__init() failed with error %d\n", r); 1073 goto fail; 1074 } 1075 1076 /* 1077 * vidmode should be either specified 1078 * either set by default 1079 */ 1080 if (vnc || sdl) { 1081 if (vidmode == -1) 1082 vidmode = 0x312; 1083 } else { 1084 vidmode = 0; 1085 } 1086 1087 memset(real_cmdline, 0, sizeof(real_cmdline)); 1088 kvm__arch_set_cmdline(real_cmdline, vnc || sdl); 1089 1090 if (strlen(real_cmdline) > 0) 1091 strcat(real_cmdline, " "); 1092 1093 if (kernel_cmdline) 1094 strlcat(real_cmdline, kernel_cmdline, sizeof(real_cmdline)); 1095 1096 if (!using_rootfs && !image_filename[0] && !initrd_filename) { 1097 char tmp[PATH_MAX]; 1098 1099 kvm_setup_create_new(custom_rootfs_name); 1100 kvm_setup_resolv(custom_rootfs_name); 1101 1102 snprintf(tmp, PATH_MAX, "%s%s", kvm__get_dir(), "default"); 1103 if (virtio_9p__register(kvm, tmp, "/dev/root") < 0) 1104 die("Unable to initialize virtio 9p"); 1105 if (virtio_9p__register(kvm, "/", "hostfs") < 0) 1106 die("Unable to initialize virtio 9p"); 1107 using_rootfs = custom_rootfs = 1; 1108 } 1109 1110 if (using_rootfs) { 1111 strcat(real_cmdline, " root=/dev/root rw rootflags=rw,trans=virtio,version=9p2000.L rootfstype=9p"); 1112 if (custom_rootfs) { 1113 kvm_run_set_sandbox(); 1114 1115 strcat(real_cmdline, " init=/virt/init"); 1116 1117 if (!no_dhcp) 1118 strcat(real_cmdline, " ip=dhcp"); 1119 if (kvm_custom_stage2()) 1120 die("Failed linking stage 2 of init."); 1121 } 1122 } else if (!strstr(real_cmdline, "root=")) { 1123 strlcat(real_cmdline, " root=/dev/vda rw ", sizeof(real_cmdline)); 1124 } 1125 1126 if (image_count) { 1127 kvm->nr_disks = image_count; 1128 kvm->disks = disk_image__open_all(image_filename, readonly_image, image_count); 1129 if (IS_ERR(kvm->disks)) { 1130 r = PTR_ERR(kvm->disks); 1131 pr_err("disk_image__open_all() failed with error %ld\n", 1132 PTR_ERR(kvm->disks)); 1133 goto fail; 1134 } 1135 } 1136 1137 printf(" # %s run -k %s -m %Lu -c %d --name %s\n", KVM_BINARY_NAME, 1138 kernel_filename, ram_size / 1024 / 1024, nrcpus, guest_name); 1139 1140 if (!firmware_filename) { 1141 if (!kvm__load_kernel(kvm, kernel_filename, 1142 initrd_filename, real_cmdline, vidmode)) 1143 die("unable to load kernel %s", kernel_filename); 1144 1145 kvm->vmlinux = vmlinux_filename; 1146 r = symbol_init(kvm); 1147 if (r < 0) 1148 pr_debug("symbol_init() failed with error %d\n", r); 1149 } 1150 1151 ioport__setup_arch(); 1152 1153 r = rtc__init(kvm); 1154 if (r < 0) { 1155 pr_err("rtc__init() failed with error %d\n", r); 1156 goto fail; 1157 } 1158 1159 r = serial8250__init(kvm); 1160 if (r < 0) { 1161 pr_err("serial__init() failed with error %d\n", r); 1162 goto fail; 1163 } 1164 1165 r = virtio_blk__init(kvm); 1166 if (r < 0) { 1167 pr_err("virtio_blk__init() failed with error %d\n", r); 1168 goto fail; 1169 } 1170 1171 if (active_console == CONSOLE_VIRTIO) 1172 virtio_console__init(kvm); 1173 1174 if (virtio_rng) 1175 virtio_rng__init(kvm); 1176 1177 if (balloon) 1178 virtio_bln__init(kvm); 1179 1180 if (!network) 1181 network = DEFAULT_NETWORK; 1182 1183 virtio_9p__init(kvm); 1184 1185 for (i = 0; i < num_net_devices; i++) { 1186 net_params[i].kvm = kvm; 1187 virtio_net__init(&net_params[i]); 1188 } 1189 1190 if (num_net_devices == 0 && no_net == 0) { 1191 struct virtio_net_params net_params; 1192 1193 net_params = (struct virtio_net_params) { 1194 .guest_ip = guest_ip, 1195 .host_ip = host_ip, 1196 .kvm = kvm, 1197 .script = script, 1198 .mode = NET_MODE_USER, 1199 }; 1200 str_to_mac(guest_mac, net_params.guest_mac); 1201 str_to_mac(host_mac, net_params.host_mac); 1202 1203 virtio_net__init(&net_params); 1204 } 1205 1206 kvm__init_ram(kvm); 1207 1208 #ifdef CONFIG_X86 1209 kbd__init(kvm); 1210 #endif 1211 1212 pci_shmem__init(kvm); 1213 1214 if (vnc || sdl) { 1215 fb = vesa__init(kvm); 1216 if (IS_ERR(fb)) { 1217 pr_err("vesa__init() failed with error %ld\n", PTR_ERR(fb)); 1218 goto fail; 1219 } 1220 } 1221 1222 if (vnc && fb) { 1223 r = vnc__init(fb); 1224 if (r < 0) { 1225 pr_err("vnc__init() failed with error %d\n", r); 1226 goto fail; 1227 } 1228 } 1229 1230 if (sdl && fb) { 1231 sdl__init(fb); 1232 if (r < 0) { 1233 pr_err("sdl__init() failed with error %d\n", r); 1234 goto fail; 1235 } 1236 } 1237 1238 r = fb__start(); 1239 if (r < 0) { 1240 pr_err("fb__init() failed with error %d\n", r); 1241 goto fail; 1242 } 1243 1244 /* Device init all done; firmware init must 1245 * come after this (it may set up device trees etc.) 1246 */ 1247 1248 kvm__start_timer(kvm); 1249 1250 if (firmware_filename) { 1251 if (!kvm__load_firmware(kvm, firmware_filename)) 1252 die("unable to load firmware image %s: %s", firmware_filename, strerror(errno)); 1253 } else { 1254 kvm__arch_setup_firmware(kvm); 1255 if (r < 0) { 1256 pr_err("kvm__arch_setup_firmware() failed with error %d\n", r); 1257 goto fail; 1258 } 1259 } 1260 1261 for (i = 0; i < nrcpus; i++) { 1262 kvm_cpus[i] = kvm_cpu__init(kvm, i); 1263 if (!kvm_cpus[i]) 1264 die("unable to initialize KVM VCPU"); 1265 } 1266 1267 thread_pool__init(nr_online_cpus); 1268 fail: 1269 return r; 1270 } 1271 1272 static int kvm_cmd_run_work(void) 1273 { 1274 int i, r = -1; 1275 void *ret = NULL; 1276 1277 for (i = 0; i < nrcpus; i++) { 1278 if (pthread_create(&kvm_cpus[i]->thread, NULL, kvm_cpu_thread, kvm_cpus[i]) != 0) 1279 die("unable to create KVM VCPU thread"); 1280 } 1281 1282 /* Only VCPU #0 is going to exit by itself when shutting down */ 1283 if (pthread_join(kvm_cpus[0]->thread, &ret) != 0) 1284 r = 0; 1285 1286 kvm_cpu__delete(kvm_cpus[0]); 1287 kvm_cpus[0] = NULL; 1288 1289 for (i = 1; i < nrcpus; i++) { 1290 if (kvm_cpus[i]->is_running) { 1291 pthread_kill(kvm_cpus[i]->thread, SIGKVMEXIT); 1292 if (pthread_join(kvm_cpus[i]->thread, &ret) != 0) 1293 die("pthread_join"); 1294 kvm_cpu__delete(kvm_cpus[i]); 1295 } 1296 if (ret == NULL) 1297 r = 0; 1298 } 1299 1300 return r; 1301 } 1302 1303 static void kvm_cmd_run_exit(int guest_ret) 1304 { 1305 int r = 0; 1306 1307 compat__print_all_messages(); 1308 1309 r = symbol_exit(kvm); 1310 if (r < 0) 1311 pr_warning("symbol_exit() failed with error %d\n", r); 1312 1313 r = irq__exit(kvm); 1314 if (r < 0) 1315 pr_warning("irq__exit() failed with error %d\n", r); 1316 1317 fb__stop(); 1318 1319 r = virtio_blk__exit(kvm); 1320 if (r < 0) 1321 pr_warning("virtio_blk__exit() failed with error %d\n", r); 1322 1323 r = virtio_rng__exit(kvm); 1324 if (r < 0) 1325 pr_warning("virtio_rng__exit() failed with error %d\n", r); 1326 1327 r = disk_image__close_all(kvm->disks, image_count); 1328 if (r < 0) 1329 pr_warning("disk_image__close_all() failed with error %d\n", r); 1330 1331 r = serial8250__exit(kvm); 1332 if (r < 0) 1333 pr_warning("serial8250__exit() failed with error %d\n", r); 1334 1335 r = rtc__exit(kvm); 1336 if (r < 0) 1337 pr_warning("rtc__exit() failed with error %d\n", r); 1338 1339 r = kvm__arch_free_firmware(kvm); 1340 if (r < 0) 1341 pr_warning("kvm__arch_free_firmware() failed with error %d\n", r); 1342 1343 r = ioport__exit(kvm); 1344 if (r < 0) 1345 pr_warning("ioport__exit() failed with error %d\n", r); 1346 1347 r = ioeventfd__exit(kvm); 1348 if (r < 0) 1349 pr_warning("ioeventfd__exit() failed with error %d\n", r); 1350 1351 r = pci__exit(kvm); 1352 if (r < 0) 1353 pr_warning("pci__exit() failed with error %d\n", r); 1354 1355 r = kvm__exit(kvm); 1356 if (r < 0) 1357 pr_warning("pci__exit() failed with error %d\n", r); 1358 1359 free(kvm_cpus); 1360 1361 if (guest_ret == 0) 1362 printf("\n # KVM session ended normally.\n"); 1363 } 1364 1365 int kvm_cmd_run(int argc, const char **argv, const char *prefix) 1366 { 1367 int r, ret = -EFAULT; 1368 1369 r = kvm_cmd_run_init(argc, argv); 1370 if (r < 0) 1371 return r; 1372 1373 ret = kvm_cmd_run_work(); 1374 kvm_cmd_run_exit(ret); 1375 1376 return ret; 1377 } 1378