1 #include <stdio.h> 2 #include <string.h> 3 #include <signal.h> 4 #include <stdint.h> 5 #include <unistd.h> 6 #include <inttypes.h> 7 #include <stdlib.h> 8 #include <termios.h> 9 #include <sys/utsname.h> 10 #include <sys/types.h> 11 #include <sys/stat.h> 12 13 /* user defined header files */ 14 #include <linux/types.h> 15 #include <kvm/kvm.h> 16 #include <kvm/kvm-cpu.h> 17 #include <kvm/8250-serial.h> 18 #include <kvm/virtio-blk.h> 19 #include <kvm/virtio-net.h> 20 #include <kvm/virtio-console.h> 21 #include <kvm/disk-image.h> 22 #include <kvm/util.h> 23 #include <kvm/pci.h> 24 #include <kvm/term.h> 25 #include <kvm/ioport.h> 26 27 /* header files for gitish interface */ 28 #include <kvm/kvm-run.h> 29 #include <kvm/parse-options.h> 30 31 #define DEFAULT_KVM_DEV "/dev/kvm" 32 #define DEFAULT_CONSOLE "serial" 33 #define DEFAULT_NETWORK "virtio" 34 #define DEFAULT_HOST_ADDR "192.168.33.2" 35 #define DEFAULT_GUEST_MAC "00:11:22:33:44:55" 36 #define DEFAULT_SCRIPT "none" 37 38 #define MB_SHIFT (20) 39 #define MIN_RAM_SIZE_MB (64ULL) 40 #define MIN_RAM_SIZE_BYTE (MIN_RAM_SIZE_MB << MB_SHIFT) 41 42 #define KVM_NR_CPUS (255) 43 44 static struct kvm *kvm; 45 static struct kvm_cpu *kvm_cpus[KVM_NR_CPUS]; 46 static __thread struct kvm_cpu *current_kvm_cpu; 47 48 static void handle_sigquit(int sig) 49 { 50 serial8250__inject_sysrq(kvm); 51 } 52 53 static void handle_sigalrm(int sig) 54 { 55 serial8250__inject_interrupt(kvm); 56 virtio_console__inject_interrupt(kvm); 57 } 58 59 static u64 ram_size = MIN_RAM_SIZE_MB; 60 static const char *kernel_cmdline; 61 static const char *kernel_filename; 62 static const char *initrd_filename; 63 static const char *image_filename; 64 static const char *console; 65 static const char *kvm_dev; 66 static const char *network; 67 static const char *host_ip_addr; 68 static const char *guest_mac; 69 static const char *script; 70 static bool single_step; 71 static bool readonly_image; 72 extern bool ioport_debug; 73 extern int active_console; 74 75 static int nrcpus = 1; 76 77 static const char * const run_usage[] = { 78 "kvm run [<options>] [<kernel image>]", 79 NULL 80 }; 81 82 static const struct option options[] = { 83 OPT_GROUP("Basic options:"), 84 OPT_INTEGER('\0', "cpus", &nrcpus, "Number of CPUs"), 85 OPT_U64('m', "mem", &ram_size, "Virtual machine memory size in MiB."), 86 OPT_STRING('i', "image", &image_filename, "image", "Disk image"), 87 OPT_BOOLEAN('\0', "readonly", &readonly_image, 88 "Don't write changes back to disk image"), 89 OPT_STRING('c', "console", &console, "serial or virtio", 90 "Console to use"), 91 92 OPT_GROUP("Kernel options:"), 93 OPT_STRING('k', "kernel", &kernel_filename, "kernel", 94 "Kernel to boot in virtual machine"), 95 OPT_STRING('r', "initrd", &initrd_filename, "initrd", 96 "Initial RAM disk image"), 97 OPT_STRING('p', "params", &kernel_cmdline, "params", 98 "Kernel command line arguments"), 99 100 OPT_GROUP("Networking options:"), 101 OPT_STRING('n', "network", &network, "virtio", 102 "Network to use"), 103 OPT_STRING('\0', "host-ip-addr", &host_ip_addr, "a.b.c.d", 104 "Assign this address to the host side networking"), 105 OPT_STRING('\0', "guest-mac", &guest_mac, "aa:bb:cc:dd:ee:ff", 106 "Assign this address to the guest side NIC"), 107 OPT_STRING('\0', "tapscript", &script, "Script path", 108 "Assign a script to process created tap device"), 109 OPT_GROUP("Debug options:"), 110 OPT_STRING('d', "kvm-dev", &kvm_dev, "kvm-dev", "KVM device file"), 111 OPT_BOOLEAN('s', "single-step", &single_step, 112 "Enable single stepping"), 113 OPT_BOOLEAN('g', "ioport-debug", &ioport_debug, 114 "Enable ioport debugging"), 115 OPT_END() 116 }; 117 118 static void *kvm_cpu_thread(void *arg) 119 { 120 current_kvm_cpu = arg; 121 122 if (kvm_cpu__start(current_kvm_cpu)) 123 goto panic_kvm; 124 125 kvm_cpu__delete(current_kvm_cpu); 126 127 return (void *) (intptr_t) 0; 128 129 panic_kvm: 130 fprintf(stderr, "KVM exit reason: %" PRIu32 " (\"%s\")\n", 131 current_kvm_cpu->kvm_run->exit_reason, 132 kvm_exit_reasons[current_kvm_cpu->kvm_run->exit_reason]); 133 if (current_kvm_cpu->kvm_run->exit_reason == KVM_EXIT_UNKNOWN) 134 fprintf(stderr, "KVM exit code: 0x%Lu\n", 135 current_kvm_cpu->kvm_run->hw.hardware_exit_reason); 136 disk_image__close(kvm->disk_image); 137 kvm_cpu__show_registers(current_kvm_cpu); 138 kvm_cpu__show_code(current_kvm_cpu); 139 kvm_cpu__show_page_tables(current_kvm_cpu); 140 141 kvm_cpu__delete(current_kvm_cpu); 142 143 return (void *) (intptr_t) 1; 144 } 145 146 static char kernel[PATH_MAX]; 147 const char *host_kernels[] = { 148 "/boot/vmlinuz", 149 "/boot/bzImage", 150 NULL 151 }; 152 const char *defult_kernels[] = { 153 "./bzImage", 154 "../../arch/x86/boot/bzImage", 155 NULL 156 }; 157 158 static void kernel_usage_with_options(void) 159 { 160 const char **k; 161 struct utsname uts; 162 163 fprintf(stderr, "Fatal: could not find default kernel image in:\n"); 164 k = &defult_kernels[0]; 165 while (*k) { 166 fprintf(stderr, "\t%s\n", *k); 167 k++; 168 } 169 170 if (uname(&uts) < 0) 171 return; 172 173 k = &host_kernels[0]; 174 while (*k) { 175 if (snprintf(kernel, PATH_MAX, "%s-%s", *k, uts.release) < 0) 176 return; 177 fprintf(stderr, "\t%s\n", kernel); 178 k++; 179 } 180 usage_with_options(run_usage, options); 181 } 182 183 static const char *find_kernel(void) 184 { 185 const char **k; 186 struct stat st; 187 struct utsname uts; 188 189 k = &defult_kernels[0]; 190 while (*k) { 191 if (stat(*k, &st) < 0 || !S_ISREG(st.st_mode)) { 192 k++; 193 continue; 194 } 195 strncpy(kernel, *k, PATH_MAX); 196 return kernel; 197 } 198 199 if (uname(&uts) < 0) 200 return NULL; 201 202 k = &host_kernels[0]; 203 while (*k) { 204 if (snprintf(kernel, PATH_MAX, "%s-%s", *k, uts.release) < 0) 205 return NULL; 206 207 if (stat(kernel, &st) < 0 || !S_ISREG(st.st_mode)) { 208 k++; 209 continue; 210 } 211 return kernel; 212 213 } 214 return NULL; 215 } 216 217 int kvm_cmd_run(int argc, const char **argv, const char *prefix) 218 { 219 static char real_cmdline[2048]; 220 int exit_code = 0; 221 int i; 222 struct virtio_net_parameters net_params; 223 224 signal(SIGALRM, handle_sigalrm); 225 signal(SIGQUIT, handle_sigquit); 226 227 while (argc != 0) { 228 argc = parse_options(argc, argv, options, run_usage, 229 PARSE_OPT_STOP_AT_NON_OPTION); 230 if (argc != 0) { 231 if (kernel_filename) { 232 fprintf(stderr, "Cannot handle parameter: " 233 "%s\n", argv[0]); 234 usage_with_options(run_usage, options); 235 return EINVAL; 236 } 237 /* first unhandled parameter is treated as a kernel 238 image 239 */ 240 kernel_filename = argv[0]; 241 argv++; 242 argc--; 243 } 244 245 } 246 247 if (!kernel_filename) 248 kernel_filename = find_kernel(); 249 250 if (!kernel_filename) { 251 kernel_usage_with_options(); 252 return EINVAL; 253 } 254 255 if (nrcpus < 1 || nrcpus > KVM_NR_CPUS) 256 die("Number of CPUs %d is out of [1;%d] range", nrcpus, KVM_NR_CPUS); 257 258 /* FIXME: Remove as only SMP gets fully supported */ 259 if (nrcpus > 1) 260 warning("Limiting CPUs to 1, true SMP is not yet implemented"); 261 262 if (ram_size < MIN_RAM_SIZE_MB) 263 die("Not enough memory specified: %lluMB (min %lluMB)", ram_size, MIN_RAM_SIZE_MB); 264 265 ram_size <<= MB_SHIFT; 266 267 if (!kvm_dev) 268 kvm_dev = DEFAULT_KVM_DEV; 269 270 if (!console) 271 console = DEFAULT_CONSOLE; 272 273 if (!strncmp(console, "virtio", 6)) 274 active_console = CONSOLE_VIRTIO; 275 else 276 active_console = CONSOLE_8250; 277 278 if (!host_ip_addr) 279 host_ip_addr = DEFAULT_HOST_ADDR; 280 281 if (!guest_mac) 282 guest_mac = DEFAULT_GUEST_MAC; 283 284 if (!script) 285 script = DEFAULT_SCRIPT; 286 287 term_init(); 288 289 kvm = kvm__init(kvm_dev, ram_size); 290 291 if (image_filename) { 292 kvm->disk_image = disk_image__open(image_filename, readonly_image); 293 if (!kvm->disk_image) 294 die("unable to load disk image %s", image_filename); 295 } 296 297 strcpy(real_cmdline, "notsc nolapic noacpi pci=conf1 console=ttyS0 "); 298 if (!kernel_cmdline || !strstr(kernel_cmdline, "root=")) { 299 strlcat(real_cmdline, "root=/dev/vda rw ", 300 sizeof(real_cmdline)); 301 } 302 303 if (kernel_cmdline) { 304 strlcat(real_cmdline, kernel_cmdline, sizeof(real_cmdline)); 305 real_cmdline[sizeof(real_cmdline)-1] = '\0'; 306 } 307 308 if (!kvm__load_kernel(kvm, kernel_filename, initrd_filename, 309 real_cmdline)) 310 die("unable to load kernel %s", kernel_filename); 311 312 ioport__setup_legacy(); 313 314 kvm__setup_bios(kvm); 315 316 serial8250__init(kvm); 317 318 pci__init(); 319 320 virtio_blk__init(kvm); 321 322 virtio_console__init(kvm); 323 324 if (!network) 325 network = DEFAULT_NETWORK; 326 327 if (!strncmp(network, "virtio", 6)) { 328 net_params = (struct virtio_net_parameters) { 329 .host_ip = host_ip_addr, 330 .self = kvm, 331 .script = script 332 }; 333 sscanf(guest_mac, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", 334 net_params.guest_mac, 335 net_params.guest_mac+1, 336 net_params.guest_mac+2, 337 net_params.guest_mac+3, 338 net_params.guest_mac+4, 339 net_params.guest_mac+5); 340 341 virtio_net__init(&net_params); 342 } 343 344 kvm__start_timer(kvm); 345 346 for (i = 0; i < nrcpus; i++) { 347 kvm_cpus[i] = kvm_cpu__init(kvm, i); 348 if (!kvm_cpus[i]) 349 die("unable to initialize KVM VCPU"); 350 351 if (single_step) 352 kvm_cpu__enable_singlestep(kvm_cpus[i]); 353 354 if (pthread_create(&kvm_cpus[i]->thread, NULL, kvm_cpu_thread, kvm_cpus[i]) != 0) 355 die("unable to create KVM VCPU thread"); 356 } 357 358 for (i = 0; i < nrcpus; i++) { 359 void *ret; 360 361 if (pthread_join(kvm_cpus[i]->thread, &ret) != 0) 362 die("pthread_join"); 363 364 if (ret != NULL) 365 exit_code = 1; 366 } 367 368 disk_image__close(kvm->disk_image); 369 kvm__delete(kvm); 370 371 if (!exit_code) 372 printf("\n # KVM session ended normally.\n"); 373 374 return exit_code; 375 } 376