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 10 /* user defined header files */ 11 #include <linux/types.h> 12 #include <kvm/kvm.h> 13 #include <kvm/kvm-cpu.h> 14 #include <kvm/8250-serial.h> 15 #include <kvm/virtio-blk.h> 16 #include <kvm/virtio-console.h> 17 #include <kvm/disk-image.h> 18 #include <kvm/util.h> 19 #include <kvm/pci.h> 20 #include <kvm/term.h> 21 #include <kvm/ioport.h> 22 23 /* header files for gitish interface */ 24 #include <kvm/kvm-run.h> 25 #include <kvm/parse-options.h> 26 27 #define DEFAULT_KVM_DEV "/dev/kvm" 28 #define DEFAULT_CONSOLE "serial" 29 30 #define MB_SHIFT (20) 31 #define MIN_RAM_SIZE_MB (64ULL) 32 #define MIN_RAM_SIZE_BYTE (MIN_RAM_SIZE_MB << MB_SHIFT) 33 34 #define KVM_NR_CPUS (255) 35 36 static struct kvm *kvm; 37 static struct kvm_cpu *kvm_cpus[KVM_NR_CPUS]; 38 static __thread struct kvm_cpu *current_kvm_cpu; 39 40 static void handle_sigint(int sig) 41 { 42 exit(1); 43 } 44 45 static void handle_sigquit(int sig) 46 { 47 serial8250__inject_sysrq(kvm); 48 } 49 50 static void handle_sigalrm(int sig) 51 { 52 serial8250__inject_interrupt(kvm); 53 virtio_console__inject_interrupt(kvm); 54 } 55 56 static u64 ram_size = MIN_RAM_SIZE_MB; 57 static const char *kernel_cmdline; 58 static const char *kernel_filename; 59 static const char *initrd_filename; 60 static const char *image_filename; 61 static const char *console; 62 static const char *kvm_dev; 63 static bool single_step; 64 extern bool ioport_debug; 65 extern int active_console; 66 67 static int nrcpus = 1; 68 69 static const char * const run_usage[] = { 70 "kvm run [<options>] <kernel image>", 71 NULL 72 }; 73 74 static const struct option options[] = { 75 OPT_U64('m', "mem", &ram_size, "Virtual machine memory size in MiB."), 76 OPT_STRING('p', "params", &kernel_cmdline, "params", 77 "Kernel command line arguments"), 78 OPT_STRING('r', "initrd", &initrd_filename, "initrd", 79 "Initial RAM disk image"), 80 OPT_STRING('k', "kernel", &kernel_filename, "kernel", 81 "Kernel to boot in virtual machine"), 82 OPT_STRING('i', "image", &image_filename, "image", "Disk image"), 83 OPT_STRING('d', "kvm-dev", &kvm_dev, "kvm-dev", "KVM device file"), 84 OPT_BOOLEAN('s', "single-step", &single_step, 85 "Enable single stepping"), 86 OPT_BOOLEAN('g', "ioport-debug", &ioport_debug, 87 "Enable ioport debugging"), 88 OPT_STRING('c', "console", &console, "serial or virtio", 89 "Console to use"), 90 OPT_INTEGER('\0', "cpus", &nrcpus, "Number of CPUs"), 91 OPT_END() 92 }; 93 94 static void *kvm_cpu_thread(void *arg) 95 { 96 current_kvm_cpu = arg; 97 98 if (kvm_cpu__start(current_kvm_cpu)) 99 goto panic_kvm; 100 101 kvm_cpu__delete(current_kvm_cpu); 102 103 return (void *) (intptr_t) 0; 104 105 panic_kvm: 106 fprintf(stderr, "KVM exit reason: %" PRIu32 " (\"%s\")\n", 107 current_kvm_cpu->kvm_run->exit_reason, 108 kvm_exit_reasons[current_kvm_cpu->kvm_run->exit_reason]); 109 if (current_kvm_cpu->kvm_run->exit_reason == KVM_EXIT_UNKNOWN) 110 fprintf(stderr, "KVM exit code: 0x%Lu\n", 111 current_kvm_cpu->kvm_run->hw.hardware_exit_reason); 112 disk_image__close(kvm->disk_image); 113 kvm_cpu__show_registers(current_kvm_cpu); 114 kvm_cpu__show_code(current_kvm_cpu); 115 kvm_cpu__show_page_tables(current_kvm_cpu); 116 117 kvm_cpu__delete(current_kvm_cpu); 118 119 return (void *) (intptr_t) 1; 120 } 121 122 int kvm_cmd_run(int argc, const char **argv, const char *prefix) 123 { 124 static char real_cmdline[2048]; 125 int exit_code = 0; 126 int i; 127 128 signal(SIGALRM, handle_sigalrm); 129 signal(SIGQUIT, handle_sigquit); 130 signal(SIGINT, handle_sigint); 131 132 if (!argv || !*argv) { 133 /* no argument specified */ 134 usage_with_options(run_usage, options); 135 return EINVAL; 136 } 137 138 while (argc != 0) { 139 argc = parse_options(argc, argv, options, run_usage, 140 PARSE_OPT_STOP_AT_NON_OPTION); 141 if (argc != 0) { 142 if (kernel_filename) { 143 fprintf(stderr, "Cannot handle parameter: " 144 "%s\n", argv[0]); 145 usage_with_options(run_usage, options); 146 return EINVAL; 147 } 148 /* first unhandled parameter is treated as a kernel 149 image 150 */ 151 kernel_filename = argv[0]; 152 argv++; 153 argc--; 154 } 155 156 } 157 158 if (nrcpus < 1 || nrcpus > KVM_NR_CPUS) 159 die("Number of CPUs %d is out of [1;%d] range", nrcpus, KVM_NR_CPUS); 160 161 /* FIXME: Remove as only SMP gets fully supported */ 162 if (nrcpus > 1) 163 warning("Limiting CPUs to 1, true SMP is not yet implemented"); 164 165 if (ram_size < MIN_RAM_SIZE_MB) 166 die("Not enough memory specified: %lluMB (min %lluMB)", ram_size, MIN_RAM_SIZE_MB); 167 168 ram_size <<= MB_SHIFT; 169 170 if (!kvm_dev) 171 kvm_dev = DEFAULT_KVM_DEV; 172 173 if (!console) 174 console = DEFAULT_CONSOLE; 175 176 if (!strncmp(console, "virtio", 6)) 177 active_console = CONSOLE_VIRTIO; 178 else 179 active_console = CONSOLE_8250; 180 181 term_init(); 182 183 kvm = kvm__init(kvm_dev, ram_size); 184 185 if (image_filename) { 186 kvm->disk_image = disk_image__open(image_filename); 187 if (!kvm->disk_image) 188 die("unable to load disk image %s", image_filename); 189 } 190 191 strcpy(real_cmdline, "notsc nolapic noacpi pci=conf1 console=ttyS0 "); 192 if (!kernel_cmdline || !strstr(kernel_cmdline, "root=")) { 193 strlcat(real_cmdline, "root=/dev/vda rw ", 194 sizeof(real_cmdline)); 195 } 196 197 if (kernel_cmdline) { 198 strlcat(real_cmdline, kernel_cmdline, sizeof(real_cmdline)); 199 real_cmdline[sizeof(real_cmdline)-1] = '\0'; 200 } 201 202 if (!kvm__load_kernel(kvm, kernel_filename, initrd_filename, 203 real_cmdline)) 204 die("unable to load kernel %s", kernel_filename); 205 206 ioport__setup_legacy(); 207 208 kvm__setup_bios(kvm); 209 210 serial8250__init(kvm); 211 212 pci__init(); 213 214 virtio_blk__init(kvm); 215 216 virtio_console__init(kvm); 217 218 kvm__start_timer(kvm); 219 220 for (i = 0; i < nrcpus; i++) { 221 kvm_cpus[i] = kvm_cpu__init(kvm, i); 222 if (!kvm_cpus[i]) 223 die("unable to initialize KVM VCPU"); 224 225 if (single_step) 226 kvm_cpu__enable_singlestep(kvm_cpus[i]); 227 228 if (pthread_create(&kvm_cpus[i]->thread, NULL, kvm_cpu_thread, kvm_cpus[i]) != 0) 229 die("unable to create KVM VCPU thread"); 230 } 231 232 for (i = 0; i < nrcpus; i++) { 233 void *ret; 234 235 if (pthread_join(kvm_cpus[i]->thread, &ret) != 0) 236 die("pthread_join"); 237 238 if (ret != NULL) 239 exit_code = 1; 240 } 241 242 disk_image__close(kvm->disk_image); 243 kvm__delete(kvm); 244 245 if (!exit_code) 246 printf("\n # KVM session ended normally.\n"); 247 248 return exit_code; 249 } 250