1 /* 2 * Copyright (c) 2018 Intel Corporation 3 * Copyright (c) 2019 Red Hat, Inc. 4 * 5 * This program is free software; you can redistribute it and/or modify it 6 * under the terms and conditions of the GNU General Public License, 7 * version 2 or later, as published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 12 * more details. 13 * 14 * You should have received a copy of the GNU General Public License along with 15 * this program. If not, see <http://www.gnu.org/licenses/>. 16 */ 17 18 #include "qemu/osdep.h" 19 #include "qemu/error-report.h" 20 #include "qemu/cutils.h" 21 #include "qemu/units.h" 22 #include "qapi/error.h" 23 #include "qapi/visitor.h" 24 #include "qapi/qapi-visit-common.h" 25 #include "sysemu/sysemu.h" 26 #include "sysemu/cpus.h" 27 #include "sysemu/numa.h" 28 #include "sysemu/reset.h" 29 #include "sysemu/runstate.h" 30 #include "acpi-microvm.h" 31 32 #include "hw/loader.h" 33 #include "hw/irq.h" 34 #include "hw/kvm/clock.h" 35 #include "hw/i386/microvm.h" 36 #include "hw/i386/x86.h" 37 #include "target/i386/cpu.h" 38 #include "hw/intc/i8259.h" 39 #include "hw/timer/i8254.h" 40 #include "hw/rtc/mc146818rtc.h" 41 #include "hw/char/serial.h" 42 #include "hw/i386/topology.h" 43 #include "hw/i386/e820_memory_layout.h" 44 #include "hw/i386/fw_cfg.h" 45 #include "hw/virtio/virtio-mmio.h" 46 #include "hw/acpi/acpi.h" 47 #include "hw/acpi/generic_event_device.h" 48 49 #include "cpu.h" 50 #include "elf.h" 51 #include "kvm_i386.h" 52 #include "hw/xen/start_info.h" 53 54 #define MICROVM_QBOOT_FILENAME "qboot.rom" 55 #define MICROVM_BIOS_FILENAME "bios-microvm.bin" 56 57 static void microvm_set_rtc(MicrovmMachineState *mms, ISADevice *s) 58 { 59 X86MachineState *x86ms = X86_MACHINE(mms); 60 int val; 61 62 val = MIN(x86ms->below_4g_mem_size / KiB, 640); 63 rtc_set_memory(s, 0x15, val); 64 rtc_set_memory(s, 0x16, val >> 8); 65 /* extended memory (next 64MiB) */ 66 if (x86ms->below_4g_mem_size > 1 * MiB) { 67 val = (x86ms->below_4g_mem_size - 1 * MiB) / KiB; 68 } else { 69 val = 0; 70 } 71 if (val > 65535) { 72 val = 65535; 73 } 74 rtc_set_memory(s, 0x17, val); 75 rtc_set_memory(s, 0x18, val >> 8); 76 rtc_set_memory(s, 0x30, val); 77 rtc_set_memory(s, 0x31, val >> 8); 78 /* memory between 16MiB and 4GiB */ 79 if (x86ms->below_4g_mem_size > 16 * MiB) { 80 val = (x86ms->below_4g_mem_size - 16 * MiB) / (64 * KiB); 81 } else { 82 val = 0; 83 } 84 if (val > 65535) { 85 val = 65535; 86 } 87 rtc_set_memory(s, 0x34, val); 88 rtc_set_memory(s, 0x35, val >> 8); 89 /* memory above 4GiB */ 90 val = x86ms->above_4g_mem_size / 65536; 91 rtc_set_memory(s, 0x5b, val); 92 rtc_set_memory(s, 0x5c, val >> 8); 93 rtc_set_memory(s, 0x5d, val >> 16); 94 } 95 96 static void microvm_gsi_handler(void *opaque, int n, int level) 97 { 98 GSIState *s = opaque; 99 100 qemu_set_irq(s->ioapic_irq[n], level); 101 } 102 103 static void microvm_devices_init(MicrovmMachineState *mms) 104 { 105 X86MachineState *x86ms = X86_MACHINE(mms); 106 ISABus *isa_bus; 107 ISADevice *rtc_state; 108 GSIState *gsi_state; 109 int i; 110 111 /* Core components */ 112 113 gsi_state = g_malloc0(sizeof(*gsi_state)); 114 if (mms->pic == ON_OFF_AUTO_ON || mms->pic == ON_OFF_AUTO_AUTO) { 115 x86ms->gsi = qemu_allocate_irqs(gsi_handler, gsi_state, GSI_NUM_PINS); 116 } else { 117 x86ms->gsi = qemu_allocate_irqs(microvm_gsi_handler, 118 gsi_state, GSI_NUM_PINS); 119 } 120 121 isa_bus = isa_bus_new(NULL, get_system_memory(), get_system_io(), 122 &error_abort); 123 isa_bus_irqs(isa_bus, x86ms->gsi); 124 125 ioapic_init_gsi(gsi_state, "machine"); 126 127 kvmclock_create(); 128 129 mms->virtio_irq_base = x86_machine_is_acpi_enabled(x86ms) ? 16 : 5; 130 for (i = 0; i < VIRTIO_NUM_TRANSPORTS; i++) { 131 sysbus_create_simple("virtio-mmio", 132 VIRTIO_MMIO_BASE + i * 512, 133 x86ms->gsi[mms->virtio_irq_base + i]); 134 } 135 136 /* Optional and legacy devices */ 137 if (x86_machine_is_acpi_enabled(x86ms)) { 138 DeviceState *dev = qdev_new(TYPE_ACPI_GED_X86); 139 qdev_prop_set_uint32(dev, "ged-event", ACPI_GED_PWR_DOWN_EVT); 140 sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, GED_MMIO_BASE); 141 /* sysbus_mmio_map(SYS_BUS_DEVICE(dev), 1, GED_MMIO_BASE_MEMHP); */ 142 sysbus_mmio_map(SYS_BUS_DEVICE(dev), 2, GED_MMIO_BASE_REGS); 143 sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, 144 x86ms->gsi[GED_MMIO_IRQ]); 145 sysbus_realize(SYS_BUS_DEVICE(dev), &error_fatal); 146 x86ms->acpi_dev = HOTPLUG_HANDLER(dev); 147 } 148 149 if (mms->pic == ON_OFF_AUTO_ON || mms->pic == ON_OFF_AUTO_AUTO) { 150 qemu_irq *i8259; 151 152 i8259 = i8259_init(isa_bus, x86_allocate_cpu_irq()); 153 for (i = 0; i < ISA_NUM_IRQS; i++) { 154 gsi_state->i8259_irq[i] = i8259[i]; 155 } 156 g_free(i8259); 157 } 158 159 if (mms->pit == ON_OFF_AUTO_ON || mms->pit == ON_OFF_AUTO_AUTO) { 160 if (kvm_pit_in_kernel()) { 161 kvm_pit_init(isa_bus, 0x40); 162 } else { 163 i8254_pit_init(isa_bus, 0x40, 0, NULL); 164 } 165 } 166 167 if (mms->rtc == ON_OFF_AUTO_ON || 168 (mms->rtc == ON_OFF_AUTO_AUTO && !kvm_enabled())) { 169 rtc_state = mc146818_rtc_init(isa_bus, 2000, NULL); 170 microvm_set_rtc(mms, rtc_state); 171 } 172 173 if (mms->isa_serial) { 174 serial_hds_isa_init(isa_bus, 0, 1); 175 } 176 177 if (bios_name == NULL) { 178 bios_name = x86_machine_is_acpi_enabled(x86ms) 179 ? MICROVM_BIOS_FILENAME 180 : MICROVM_QBOOT_FILENAME; 181 } 182 x86_bios_rom_init(get_system_memory(), true); 183 } 184 185 static void microvm_memory_init(MicrovmMachineState *mms) 186 { 187 MachineState *machine = MACHINE(mms); 188 X86MachineState *x86ms = X86_MACHINE(mms); 189 MemoryRegion *ram_below_4g, *ram_above_4g; 190 MemoryRegion *system_memory = get_system_memory(); 191 FWCfgState *fw_cfg; 192 ram_addr_t lowmem = 0xc0000000; /* 3G */ 193 int i; 194 195 if (machine->ram_size > lowmem) { 196 x86ms->above_4g_mem_size = machine->ram_size - lowmem; 197 x86ms->below_4g_mem_size = lowmem; 198 } else { 199 x86ms->above_4g_mem_size = 0; 200 x86ms->below_4g_mem_size = machine->ram_size; 201 } 202 203 ram_below_4g = g_malloc(sizeof(*ram_below_4g)); 204 memory_region_init_alias(ram_below_4g, NULL, "ram-below-4g", machine->ram, 205 0, x86ms->below_4g_mem_size); 206 memory_region_add_subregion(system_memory, 0, ram_below_4g); 207 208 e820_add_entry(0, x86ms->below_4g_mem_size, E820_RAM); 209 210 if (x86ms->above_4g_mem_size > 0) { 211 ram_above_4g = g_malloc(sizeof(*ram_above_4g)); 212 memory_region_init_alias(ram_above_4g, NULL, "ram-above-4g", 213 machine->ram, 214 x86ms->below_4g_mem_size, 215 x86ms->above_4g_mem_size); 216 memory_region_add_subregion(system_memory, 0x100000000ULL, 217 ram_above_4g); 218 e820_add_entry(0x100000000ULL, x86ms->above_4g_mem_size, E820_RAM); 219 } 220 221 fw_cfg = fw_cfg_init_io_dma(FW_CFG_IO_BASE, FW_CFG_IO_BASE + 4, 222 &address_space_memory); 223 224 fw_cfg_add_i16(fw_cfg, FW_CFG_NB_CPUS, machine->smp.cpus); 225 fw_cfg_add_i16(fw_cfg, FW_CFG_MAX_CPUS, machine->smp.max_cpus); 226 fw_cfg_add_i64(fw_cfg, FW_CFG_RAM_SIZE, (uint64_t)machine->ram_size); 227 fw_cfg_add_i32(fw_cfg, FW_CFG_IRQ0_OVERRIDE, kvm_allows_irq0_override()); 228 fw_cfg_add_bytes(fw_cfg, FW_CFG_E820_TABLE, 229 &e820_reserve, sizeof(e820_reserve)); 230 fw_cfg_add_file(fw_cfg, "etc/e820", e820_table, 231 sizeof(struct e820_entry) * e820_get_num_entries()); 232 233 rom_set_fw(fw_cfg); 234 235 if (machine->kernel_filename != NULL) { 236 x86_load_linux(x86ms, fw_cfg, 0, true, true); 237 } 238 239 if (mms->option_roms) { 240 for (i = 0; i < nb_option_roms; i++) { 241 rom_add_option(option_rom[i].name, option_rom[i].bootindex); 242 } 243 } 244 245 x86ms->fw_cfg = fw_cfg; 246 x86ms->ioapic_as = &address_space_memory; 247 } 248 249 static gchar *microvm_get_mmio_cmdline(gchar *name, uint32_t virtio_irq_base) 250 { 251 gchar *cmdline; 252 gchar *separator; 253 long int index; 254 int ret; 255 256 separator = g_strrstr(name, "."); 257 if (!separator) { 258 return NULL; 259 } 260 261 if (qemu_strtol(separator + 1, NULL, 10, &index) != 0) { 262 return NULL; 263 } 264 265 cmdline = g_malloc0(VIRTIO_CMDLINE_MAXLEN); 266 ret = g_snprintf(cmdline, VIRTIO_CMDLINE_MAXLEN, 267 " virtio_mmio.device=512@0x%lx:%ld", 268 VIRTIO_MMIO_BASE + index * 512, 269 virtio_irq_base + index); 270 if (ret < 0 || ret >= VIRTIO_CMDLINE_MAXLEN) { 271 g_free(cmdline); 272 return NULL; 273 } 274 275 return cmdline; 276 } 277 278 static void microvm_fix_kernel_cmdline(MachineState *machine) 279 { 280 X86MachineState *x86ms = X86_MACHINE(machine); 281 MicrovmMachineState *mms = MICROVM_MACHINE(machine); 282 BusState *bus; 283 BusChild *kid; 284 char *cmdline; 285 286 /* 287 * Find MMIO transports with attached devices, and add them to the kernel 288 * command line. 289 * 290 * Yes, this is a hack, but one that heavily improves the UX without 291 * introducing any significant issues. 292 */ 293 cmdline = g_strdup(machine->kernel_cmdline); 294 bus = sysbus_get_default(); 295 QTAILQ_FOREACH(kid, &bus->children, sibling) { 296 DeviceState *dev = kid->child; 297 ObjectClass *class = object_get_class(OBJECT(dev)); 298 299 if (class == object_class_by_name(TYPE_VIRTIO_MMIO)) { 300 VirtIOMMIOProxy *mmio = VIRTIO_MMIO(OBJECT(dev)); 301 VirtioBusState *mmio_virtio_bus = &mmio->bus; 302 BusState *mmio_bus = &mmio_virtio_bus->parent_obj; 303 304 if (!QTAILQ_EMPTY(&mmio_bus->children)) { 305 gchar *mmio_cmdline = microvm_get_mmio_cmdline 306 (mmio_bus->name, mms->virtio_irq_base); 307 if (mmio_cmdline) { 308 char *newcmd = g_strjoin(NULL, cmdline, mmio_cmdline, NULL); 309 g_free(mmio_cmdline); 310 g_free(cmdline); 311 cmdline = newcmd; 312 } 313 } 314 } 315 } 316 317 fw_cfg_modify_i32(x86ms->fw_cfg, FW_CFG_CMDLINE_SIZE, strlen(cmdline) + 1); 318 fw_cfg_modify_string(x86ms->fw_cfg, FW_CFG_CMDLINE_DATA, cmdline); 319 320 g_free(cmdline); 321 } 322 323 static void microvm_device_pre_plug_cb(HotplugHandler *hotplug_dev, 324 DeviceState *dev, Error **errp) 325 { 326 x86_cpu_pre_plug(hotplug_dev, dev, errp); 327 } 328 329 static void microvm_device_plug_cb(HotplugHandler *hotplug_dev, 330 DeviceState *dev, Error **errp) 331 { 332 x86_cpu_plug(hotplug_dev, dev, errp); 333 } 334 335 static void microvm_device_unplug_request_cb(HotplugHandler *hotplug_dev, 336 DeviceState *dev, Error **errp) 337 { 338 error_setg(errp, "unplug not supported by microvm"); 339 } 340 341 static void microvm_device_unplug_cb(HotplugHandler *hotplug_dev, 342 DeviceState *dev, Error **errp) 343 { 344 error_setg(errp, "unplug not supported by microvm"); 345 } 346 347 static HotplugHandler *microvm_get_hotplug_handler(MachineState *machine, 348 DeviceState *dev) 349 { 350 if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) { 351 return HOTPLUG_HANDLER(machine); 352 } 353 return NULL; 354 } 355 356 static void microvm_machine_state_init(MachineState *machine) 357 { 358 MicrovmMachineState *mms = MICROVM_MACHINE(machine); 359 X86MachineState *x86ms = X86_MACHINE(machine); 360 Error *local_err = NULL; 361 362 microvm_memory_init(mms); 363 364 x86_cpus_init(x86ms, CPU_VERSION_LATEST); 365 if (local_err) { 366 error_report_err(local_err); 367 exit(1); 368 } 369 370 microvm_devices_init(mms); 371 } 372 373 static void microvm_machine_reset(MachineState *machine) 374 { 375 MicrovmMachineState *mms = MICROVM_MACHINE(machine); 376 CPUState *cs; 377 X86CPU *cpu; 378 379 if (!x86_machine_is_acpi_enabled(X86_MACHINE(machine)) && 380 machine->kernel_filename != NULL && 381 mms->auto_kernel_cmdline && !mms->kernel_cmdline_fixed) { 382 microvm_fix_kernel_cmdline(machine); 383 mms->kernel_cmdline_fixed = true; 384 } 385 386 qemu_devices_reset(); 387 388 CPU_FOREACH(cs) { 389 cpu = X86_CPU(cs); 390 391 if (cpu->apic_state) { 392 device_legacy_reset(cpu->apic_state); 393 } 394 } 395 } 396 397 static void microvm_machine_get_pic(Object *obj, Visitor *v, const char *name, 398 void *opaque, Error **errp) 399 { 400 MicrovmMachineState *mms = MICROVM_MACHINE(obj); 401 OnOffAuto pic = mms->pic; 402 403 visit_type_OnOffAuto(v, name, &pic, errp); 404 } 405 406 static void microvm_machine_set_pic(Object *obj, Visitor *v, const char *name, 407 void *opaque, Error **errp) 408 { 409 MicrovmMachineState *mms = MICROVM_MACHINE(obj); 410 411 visit_type_OnOffAuto(v, name, &mms->pic, errp); 412 } 413 414 static void microvm_machine_get_pit(Object *obj, Visitor *v, const char *name, 415 void *opaque, Error **errp) 416 { 417 MicrovmMachineState *mms = MICROVM_MACHINE(obj); 418 OnOffAuto pit = mms->pit; 419 420 visit_type_OnOffAuto(v, name, &pit, errp); 421 } 422 423 static void microvm_machine_set_pit(Object *obj, Visitor *v, const char *name, 424 void *opaque, Error **errp) 425 { 426 MicrovmMachineState *mms = MICROVM_MACHINE(obj); 427 428 visit_type_OnOffAuto(v, name, &mms->pit, errp); 429 } 430 431 static void microvm_machine_get_rtc(Object *obj, Visitor *v, const char *name, 432 void *opaque, Error **errp) 433 { 434 MicrovmMachineState *mms = MICROVM_MACHINE(obj); 435 OnOffAuto rtc = mms->rtc; 436 437 visit_type_OnOffAuto(v, name, &rtc, errp); 438 } 439 440 static void microvm_machine_set_rtc(Object *obj, Visitor *v, const char *name, 441 void *opaque, Error **errp) 442 { 443 MicrovmMachineState *mms = MICROVM_MACHINE(obj); 444 445 visit_type_OnOffAuto(v, name, &mms->rtc, errp); 446 } 447 448 static bool microvm_machine_get_isa_serial(Object *obj, Error **errp) 449 { 450 MicrovmMachineState *mms = MICROVM_MACHINE(obj); 451 452 return mms->isa_serial; 453 } 454 455 static void microvm_machine_set_isa_serial(Object *obj, bool value, 456 Error **errp) 457 { 458 MicrovmMachineState *mms = MICROVM_MACHINE(obj); 459 460 mms->isa_serial = value; 461 } 462 463 static bool microvm_machine_get_option_roms(Object *obj, Error **errp) 464 { 465 MicrovmMachineState *mms = MICROVM_MACHINE(obj); 466 467 return mms->option_roms; 468 } 469 470 static void microvm_machine_set_option_roms(Object *obj, bool value, 471 Error **errp) 472 { 473 MicrovmMachineState *mms = MICROVM_MACHINE(obj); 474 475 mms->option_roms = value; 476 } 477 478 static bool microvm_machine_get_auto_kernel_cmdline(Object *obj, Error **errp) 479 { 480 MicrovmMachineState *mms = MICROVM_MACHINE(obj); 481 482 return mms->auto_kernel_cmdline; 483 } 484 485 static void microvm_machine_set_auto_kernel_cmdline(Object *obj, bool value, 486 Error **errp) 487 { 488 MicrovmMachineState *mms = MICROVM_MACHINE(obj); 489 490 mms->auto_kernel_cmdline = value; 491 } 492 493 static void microvm_machine_done(Notifier *notifier, void *data) 494 { 495 MicrovmMachineState *mms = container_of(notifier, MicrovmMachineState, 496 machine_done); 497 498 acpi_setup_microvm(mms); 499 } 500 501 static void microvm_powerdown_req(Notifier *notifier, void *data) 502 { 503 MicrovmMachineState *mms = container_of(notifier, MicrovmMachineState, 504 powerdown_req); 505 X86MachineState *x86ms = X86_MACHINE(mms); 506 507 if (x86ms->acpi_dev) { 508 Object *obj = OBJECT(x86ms->acpi_dev); 509 AcpiDeviceIfClass *adevc = ACPI_DEVICE_IF_GET_CLASS(obj); 510 adevc->send_event(ACPI_DEVICE_IF(x86ms->acpi_dev), 511 ACPI_POWER_DOWN_STATUS); 512 } 513 } 514 515 static void microvm_machine_initfn(Object *obj) 516 { 517 MicrovmMachineState *mms = MICROVM_MACHINE(obj); 518 519 /* Configuration */ 520 mms->pic = ON_OFF_AUTO_AUTO; 521 mms->pit = ON_OFF_AUTO_AUTO; 522 mms->rtc = ON_OFF_AUTO_AUTO; 523 mms->isa_serial = true; 524 mms->option_roms = true; 525 mms->auto_kernel_cmdline = true; 526 527 /* State */ 528 mms->kernel_cmdline_fixed = false; 529 530 mms->machine_done.notify = microvm_machine_done; 531 qemu_add_machine_init_done_notifier(&mms->machine_done); 532 mms->powerdown_req.notify = microvm_powerdown_req; 533 qemu_register_powerdown_notifier(&mms->powerdown_req); 534 } 535 536 static void microvm_class_init(ObjectClass *oc, void *data) 537 { 538 MachineClass *mc = MACHINE_CLASS(oc); 539 HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(oc); 540 541 mc->init = microvm_machine_state_init; 542 543 mc->family = "microvm_i386"; 544 mc->desc = "microvm (i386)"; 545 mc->units_per_default_bus = 1; 546 mc->no_floppy = 1; 547 mc->max_cpus = 288; 548 mc->has_hotpluggable_cpus = false; 549 mc->auto_enable_numa_with_memhp = false; 550 mc->auto_enable_numa_with_memdev = false; 551 mc->default_cpu_type = TARGET_DEFAULT_CPU_TYPE; 552 mc->nvdimm_supported = false; 553 mc->default_ram_id = "microvm.ram"; 554 555 /* Avoid relying too much on kernel components */ 556 mc->default_kernel_irqchip_split = true; 557 558 /* Machine class handlers */ 559 mc->reset = microvm_machine_reset; 560 561 /* hotplug (for cpu coldplug) */ 562 mc->get_hotplug_handler = microvm_get_hotplug_handler; 563 hc->pre_plug = microvm_device_pre_plug_cb; 564 hc->plug = microvm_device_plug_cb; 565 hc->unplug_request = microvm_device_unplug_request_cb; 566 hc->unplug = microvm_device_unplug_cb; 567 568 object_class_property_add(oc, MICROVM_MACHINE_PIC, "OnOffAuto", 569 microvm_machine_get_pic, 570 microvm_machine_set_pic, 571 NULL, NULL); 572 object_class_property_set_description(oc, MICROVM_MACHINE_PIC, 573 "Enable i8259 PIC"); 574 575 object_class_property_add(oc, MICROVM_MACHINE_PIT, "OnOffAuto", 576 microvm_machine_get_pit, 577 microvm_machine_set_pit, 578 NULL, NULL); 579 object_class_property_set_description(oc, MICROVM_MACHINE_PIT, 580 "Enable i8254 PIT"); 581 582 object_class_property_add(oc, MICROVM_MACHINE_RTC, "OnOffAuto", 583 microvm_machine_get_rtc, 584 microvm_machine_set_rtc, 585 NULL, NULL); 586 object_class_property_set_description(oc, MICROVM_MACHINE_RTC, 587 "Enable MC146818 RTC"); 588 589 object_class_property_add_bool(oc, MICROVM_MACHINE_ISA_SERIAL, 590 microvm_machine_get_isa_serial, 591 microvm_machine_set_isa_serial); 592 object_class_property_set_description(oc, MICROVM_MACHINE_ISA_SERIAL, 593 "Set off to disable the instantiation an ISA serial port"); 594 595 object_class_property_add_bool(oc, MICROVM_MACHINE_OPTION_ROMS, 596 microvm_machine_get_option_roms, 597 microvm_machine_set_option_roms); 598 object_class_property_set_description(oc, MICROVM_MACHINE_OPTION_ROMS, 599 "Set off to disable loading option ROMs"); 600 601 object_class_property_add_bool(oc, MICROVM_MACHINE_AUTO_KERNEL_CMDLINE, 602 microvm_machine_get_auto_kernel_cmdline, 603 microvm_machine_set_auto_kernel_cmdline); 604 object_class_property_set_description(oc, 605 MICROVM_MACHINE_AUTO_KERNEL_CMDLINE, 606 "Set off to disable adding virtio-mmio devices to the kernel cmdline"); 607 } 608 609 static const TypeInfo microvm_machine_info = { 610 .name = TYPE_MICROVM_MACHINE, 611 .parent = TYPE_X86_MACHINE, 612 .instance_size = sizeof(MicrovmMachineState), 613 .instance_init = microvm_machine_initfn, 614 .class_size = sizeof(MicrovmMachineClass), 615 .class_init = microvm_class_init, 616 .interfaces = (InterfaceInfo[]) { 617 { TYPE_HOTPLUG_HANDLER }, 618 { } 619 }, 620 }; 621 622 static void microvm_machine_init(void) 623 { 624 type_register_static(µvm_machine_info); 625 } 626 type_init(microvm_machine_init); 627