1 #include "qemu/osdep.h" 2 #include "hw/boards.h" 3 #include "migration/vmstate.h" 4 #include "hw/acpi/cpu.h" 5 #include "qapi/error.h" 6 #include "qapi/qapi-events-acpi.h" 7 #include "trace.h" 8 #include "sysemu/numa.h" 9 10 #define ACPI_CPU_HOTPLUG_REG_LEN 12 11 #define ACPI_CPU_SELECTOR_OFFSET_WR 0 12 #define ACPI_CPU_FLAGS_OFFSET_RW 4 13 #define ACPI_CPU_CMD_OFFSET_WR 5 14 #define ACPI_CPU_CMD_DATA_OFFSET_RW 8 15 #define ACPI_CPU_CMD_DATA2_OFFSET_R 0 16 17 #define OVMF_CPUHP_SMI_CMD 4 18 19 enum { 20 CPHP_GET_NEXT_CPU_WITH_EVENT_CMD = 0, 21 CPHP_OST_EVENT_CMD = 1, 22 CPHP_OST_STATUS_CMD = 2, 23 CPHP_GET_CPU_ID_CMD = 3, 24 CPHP_CMD_MAX 25 }; 26 27 static ACPIOSTInfo *acpi_cpu_device_status(int idx, AcpiCpuStatus *cdev) 28 { 29 ACPIOSTInfo *info = g_new0(ACPIOSTInfo, 1); 30 31 info->slot_type = ACPI_SLOT_TYPE_CPU; 32 info->slot = g_strdup_printf("%d", idx); 33 info->source = cdev->ost_event; 34 info->status = cdev->ost_status; 35 if (cdev->cpu) { 36 DeviceState *dev = DEVICE(cdev->cpu); 37 if (dev->id) { 38 info->device = g_strdup(dev->id); 39 info->has_device = true; 40 } 41 } 42 return info; 43 } 44 45 void acpi_cpu_ospm_status(CPUHotplugState *cpu_st, ACPIOSTInfoList ***list) 46 { 47 int i; 48 49 for (i = 0; i < cpu_st->dev_count; i++) { 50 ACPIOSTInfoList *elem = g_new0(ACPIOSTInfoList, 1); 51 elem->value = acpi_cpu_device_status(i, &cpu_st->devs[i]); 52 elem->next = NULL; 53 **list = elem; 54 *list = &elem->next; 55 } 56 } 57 58 static uint64_t cpu_hotplug_rd(void *opaque, hwaddr addr, unsigned size) 59 { 60 uint64_t val = 0; 61 CPUHotplugState *cpu_st = opaque; 62 AcpiCpuStatus *cdev; 63 64 if (cpu_st->selector >= cpu_st->dev_count) { 65 return val; 66 } 67 68 cdev = &cpu_st->devs[cpu_st->selector]; 69 switch (addr) { 70 case ACPI_CPU_FLAGS_OFFSET_RW: /* pack and return is_* fields */ 71 val |= cdev->cpu ? 1 : 0; 72 val |= cdev->is_inserting ? 2 : 0; 73 val |= cdev->is_removing ? 4 : 0; 74 val |= cdev->fw_remove ? 16 : 0; 75 trace_cpuhp_acpi_read_flags(cpu_st->selector, val); 76 break; 77 case ACPI_CPU_CMD_DATA_OFFSET_RW: 78 switch (cpu_st->command) { 79 case CPHP_GET_NEXT_CPU_WITH_EVENT_CMD: 80 val = cpu_st->selector; 81 break; 82 case CPHP_GET_CPU_ID_CMD: 83 val = cdev->arch_id & 0xFFFFFFFF; 84 break; 85 default: 86 break; 87 } 88 trace_cpuhp_acpi_read_cmd_data(cpu_st->selector, val); 89 break; 90 case ACPI_CPU_CMD_DATA2_OFFSET_R: 91 switch (cpu_st->command) { 92 case CPHP_GET_NEXT_CPU_WITH_EVENT_CMD: 93 val = 0; 94 break; 95 case CPHP_GET_CPU_ID_CMD: 96 val = cdev->arch_id >> 32; 97 break; 98 default: 99 break; 100 } 101 trace_cpuhp_acpi_read_cmd_data2(cpu_st->selector, val); 102 break; 103 default: 104 break; 105 } 106 return val; 107 } 108 109 static void cpu_hotplug_wr(void *opaque, hwaddr addr, uint64_t data, 110 unsigned int size) 111 { 112 CPUHotplugState *cpu_st = opaque; 113 AcpiCpuStatus *cdev; 114 ACPIOSTInfo *info; 115 116 assert(cpu_st->dev_count); 117 118 if (addr) { 119 if (cpu_st->selector >= cpu_st->dev_count) { 120 trace_cpuhp_acpi_invalid_idx_selected(cpu_st->selector); 121 return; 122 } 123 } 124 125 switch (addr) { 126 case ACPI_CPU_SELECTOR_OFFSET_WR: /* current CPU selector */ 127 cpu_st->selector = data; 128 trace_cpuhp_acpi_write_idx(cpu_st->selector); 129 break; 130 case ACPI_CPU_FLAGS_OFFSET_RW: /* set is_* fields */ 131 cdev = &cpu_st->devs[cpu_st->selector]; 132 if (data & 2) { /* clear insert event */ 133 cdev->is_inserting = false; 134 trace_cpuhp_acpi_clear_inserting_evt(cpu_st->selector); 135 } else if (data & 4) { /* clear remove event */ 136 cdev->is_removing = false; 137 trace_cpuhp_acpi_clear_remove_evt(cpu_st->selector); 138 } else if (data & 8) { 139 DeviceState *dev = NULL; 140 HotplugHandler *hotplug_ctrl = NULL; 141 142 if (!cdev->cpu || cdev->cpu == first_cpu) { 143 trace_cpuhp_acpi_ejecting_invalid_cpu(cpu_st->selector); 144 break; 145 } 146 147 trace_cpuhp_acpi_ejecting_cpu(cpu_st->selector); 148 dev = DEVICE(cdev->cpu); 149 hotplug_ctrl = qdev_get_hotplug_handler(dev); 150 hotplug_handler_unplug(hotplug_ctrl, dev, NULL); 151 object_unparent(OBJECT(dev)); 152 cdev->fw_remove = false; 153 } else if (data & 16) { 154 if (!cdev->cpu || cdev->cpu == first_cpu) { 155 trace_cpuhp_acpi_fw_remove_invalid_cpu(cpu_st->selector); 156 break; 157 } 158 trace_cpuhp_acpi_fw_remove_cpu(cpu_st->selector); 159 cdev->fw_remove = true; 160 } 161 break; 162 case ACPI_CPU_CMD_OFFSET_WR: 163 trace_cpuhp_acpi_write_cmd(cpu_st->selector, data); 164 if (data < CPHP_CMD_MAX) { 165 cpu_st->command = data; 166 if (cpu_st->command == CPHP_GET_NEXT_CPU_WITH_EVENT_CMD) { 167 uint32_t iter = cpu_st->selector; 168 169 do { 170 cdev = &cpu_st->devs[iter]; 171 if (cdev->is_inserting || cdev->is_removing || 172 cdev->fw_remove) { 173 cpu_st->selector = iter; 174 trace_cpuhp_acpi_cpu_has_events(cpu_st->selector, 175 cdev->is_inserting, cdev->is_removing); 176 break; 177 } 178 iter = iter + 1 < cpu_st->dev_count ? iter + 1 : 0; 179 } while (iter != cpu_st->selector); 180 } 181 } 182 break; 183 case ACPI_CPU_CMD_DATA_OFFSET_RW: 184 switch (cpu_st->command) { 185 case CPHP_OST_EVENT_CMD: { 186 cdev = &cpu_st->devs[cpu_st->selector]; 187 cdev->ost_event = data; 188 trace_cpuhp_acpi_write_ost_ev(cpu_st->selector, cdev->ost_event); 189 break; 190 } 191 case CPHP_OST_STATUS_CMD: { 192 cdev = &cpu_st->devs[cpu_st->selector]; 193 cdev->ost_status = data; 194 info = acpi_cpu_device_status(cpu_st->selector, cdev); 195 qapi_event_send_acpi_device_ost(info); 196 qapi_free_ACPIOSTInfo(info); 197 trace_cpuhp_acpi_write_ost_status(cpu_st->selector, 198 cdev->ost_status); 199 break; 200 } 201 default: 202 break; 203 } 204 break; 205 default: 206 break; 207 } 208 } 209 210 static const MemoryRegionOps cpu_hotplug_ops = { 211 .read = cpu_hotplug_rd, 212 .write = cpu_hotplug_wr, 213 .endianness = DEVICE_LITTLE_ENDIAN, 214 .valid = { 215 .min_access_size = 1, 216 .max_access_size = 4, 217 }, 218 }; 219 220 void cpu_hotplug_hw_init(MemoryRegion *as, Object *owner, 221 CPUHotplugState *state, hwaddr base_addr) 222 { 223 MachineState *machine = MACHINE(qdev_get_machine()); 224 MachineClass *mc = MACHINE_GET_CLASS(machine); 225 const CPUArchIdList *id_list; 226 int i; 227 228 assert(mc->possible_cpu_arch_ids); 229 id_list = mc->possible_cpu_arch_ids(machine); 230 state->dev_count = id_list->len; 231 state->devs = g_new0(typeof(*state->devs), state->dev_count); 232 for (i = 0; i < id_list->len; i++) { 233 state->devs[i].cpu = CPU(id_list->cpus[i].cpu); 234 state->devs[i].arch_id = id_list->cpus[i].arch_id; 235 } 236 memory_region_init_io(&state->ctrl_reg, owner, &cpu_hotplug_ops, state, 237 "acpi-cpu-hotplug", ACPI_CPU_HOTPLUG_REG_LEN); 238 memory_region_add_subregion(as, base_addr, &state->ctrl_reg); 239 } 240 241 static AcpiCpuStatus *get_cpu_status(CPUHotplugState *cpu_st, DeviceState *dev) 242 { 243 CPUClass *k = CPU_GET_CLASS(dev); 244 uint64_t cpu_arch_id = k->get_arch_id(CPU(dev)); 245 int i; 246 247 for (i = 0; i < cpu_st->dev_count; i++) { 248 if (cpu_arch_id == cpu_st->devs[i].arch_id) { 249 return &cpu_st->devs[i]; 250 } 251 } 252 return NULL; 253 } 254 255 void acpi_cpu_plug_cb(HotplugHandler *hotplug_dev, 256 CPUHotplugState *cpu_st, DeviceState *dev, Error **errp) 257 { 258 AcpiCpuStatus *cdev; 259 260 cdev = get_cpu_status(cpu_st, dev); 261 if (!cdev) { 262 return; 263 } 264 265 cdev->cpu = CPU(dev); 266 if (dev->hotplugged) { 267 cdev->is_inserting = true; 268 acpi_send_event(DEVICE(hotplug_dev), ACPI_CPU_HOTPLUG_STATUS); 269 } 270 } 271 272 void acpi_cpu_unplug_request_cb(HotplugHandler *hotplug_dev, 273 CPUHotplugState *cpu_st, 274 DeviceState *dev, Error **errp) 275 { 276 AcpiCpuStatus *cdev; 277 278 cdev = get_cpu_status(cpu_st, dev); 279 if (!cdev) { 280 return; 281 } 282 283 cdev->is_removing = true; 284 acpi_send_event(DEVICE(hotplug_dev), ACPI_CPU_HOTPLUG_STATUS); 285 } 286 287 void acpi_cpu_unplug_cb(CPUHotplugState *cpu_st, 288 DeviceState *dev, Error **errp) 289 { 290 AcpiCpuStatus *cdev; 291 292 cdev = get_cpu_status(cpu_st, dev); 293 if (!cdev) { 294 return; 295 } 296 297 cdev->cpu = NULL; 298 } 299 300 static const VMStateDescription vmstate_cpuhp_sts = { 301 .name = "CPU hotplug device state", 302 .version_id = 1, 303 .minimum_version_id = 1, 304 .minimum_version_id_old = 1, 305 .fields = (VMStateField[]) { 306 VMSTATE_BOOL(is_inserting, AcpiCpuStatus), 307 VMSTATE_BOOL(is_removing, AcpiCpuStatus), 308 VMSTATE_UINT32(ost_event, AcpiCpuStatus), 309 VMSTATE_UINT32(ost_status, AcpiCpuStatus), 310 VMSTATE_END_OF_LIST() 311 } 312 }; 313 314 const VMStateDescription vmstate_cpu_hotplug = { 315 .name = "CPU hotplug state", 316 .version_id = 1, 317 .minimum_version_id = 1, 318 .minimum_version_id_old = 1, 319 .fields = (VMStateField[]) { 320 VMSTATE_UINT32(selector, CPUHotplugState), 321 VMSTATE_UINT8(command, CPUHotplugState), 322 VMSTATE_STRUCT_VARRAY_POINTER_UINT32(devs, CPUHotplugState, dev_count, 323 vmstate_cpuhp_sts, AcpiCpuStatus), 324 VMSTATE_END_OF_LIST() 325 } 326 }; 327 328 #define CPU_NAME_FMT "C%.03X" 329 #define CPUHP_RES_DEVICE "PRES" 330 #define CPU_LOCK "CPLK" 331 #define CPU_STS_METHOD "CSTA" 332 #define CPU_SCAN_METHOD "CSCN" 333 #define CPU_NOTIFY_METHOD "CTFY" 334 #define CPU_EJECT_METHOD "CEJ0" 335 #define CPU_OST_METHOD "COST" 336 #define CPU_ADDED_LIST "CNEW" 337 338 #define CPU_ENABLED "CPEN" 339 #define CPU_SELECTOR "CSEL" 340 #define CPU_COMMAND "CCMD" 341 #define CPU_DATA "CDAT" 342 #define CPU_INSERT_EVENT "CINS" 343 #define CPU_REMOVE_EVENT "CRMV" 344 #define CPU_EJECT_EVENT "CEJ0" 345 346 void build_cpus_aml(Aml *table, MachineState *machine, CPUHotplugFeatures opts, 347 hwaddr io_base, 348 const char *res_root, 349 const char *event_handler_method) 350 { 351 Aml *ifctx; 352 Aml *field; 353 Aml *method; 354 Aml *cpu_ctrl_dev; 355 Aml *cpus_dev; 356 Aml *zero = aml_int(0); 357 Aml *one = aml_int(1); 358 Aml *sb_scope = aml_scope("_SB"); 359 MachineClass *mc = MACHINE_GET_CLASS(machine); 360 const CPUArchIdList *arch_ids = mc->possible_cpu_arch_ids(machine); 361 char *cphp_res_path = g_strdup_printf("%s." CPUHP_RES_DEVICE, res_root); 362 Object *obj = object_resolve_path_type("", TYPE_ACPI_DEVICE_IF, NULL); 363 AcpiDeviceIfClass *adevc = ACPI_DEVICE_IF_GET_CLASS(obj); 364 AcpiDeviceIf *adev = ACPI_DEVICE_IF(obj); 365 366 cpu_ctrl_dev = aml_device("%s", cphp_res_path); 367 { 368 Aml *crs; 369 370 aml_append(cpu_ctrl_dev, 371 aml_name_decl("_HID", aml_eisaid("PNP0A06"))); 372 aml_append(cpu_ctrl_dev, 373 aml_name_decl("_UID", aml_string("CPU Hotplug resources"))); 374 aml_append(cpu_ctrl_dev, aml_mutex(CPU_LOCK, 0)); 375 376 crs = aml_resource_template(); 377 aml_append(crs, aml_io(AML_DECODE16, io_base, io_base, 1, 378 ACPI_CPU_HOTPLUG_REG_LEN)); 379 aml_append(cpu_ctrl_dev, aml_name_decl("_CRS", crs)); 380 381 /* declare CPU hotplug MMIO region with related access fields */ 382 aml_append(cpu_ctrl_dev, 383 aml_operation_region("PRST", AML_SYSTEM_IO, aml_int(io_base), 384 ACPI_CPU_HOTPLUG_REG_LEN)); 385 386 field = aml_field("PRST", AML_BYTE_ACC, AML_NOLOCK, 387 AML_WRITE_AS_ZEROS); 388 aml_append(field, aml_reserved_field(ACPI_CPU_FLAGS_OFFSET_RW * 8)); 389 /* 1 if enabled, read only */ 390 aml_append(field, aml_named_field(CPU_ENABLED, 1)); 391 /* (read) 1 if has a insert event. (write) 1 to clear event */ 392 aml_append(field, aml_named_field(CPU_INSERT_EVENT, 1)); 393 /* (read) 1 if has a remove event. (write) 1 to clear event */ 394 aml_append(field, aml_named_field(CPU_REMOVE_EVENT, 1)); 395 /* initiates device eject, write only */ 396 aml_append(field, aml_named_field(CPU_EJECT_EVENT, 1)); 397 aml_append(field, aml_reserved_field(4)); 398 aml_append(field, aml_named_field(CPU_COMMAND, 8)); 399 aml_append(cpu_ctrl_dev, field); 400 401 field = aml_field("PRST", AML_DWORD_ACC, AML_NOLOCK, AML_PRESERVE); 402 /* CPU selector, write only */ 403 aml_append(field, aml_named_field(CPU_SELECTOR, 32)); 404 /* flags + cmd + 2byte align */ 405 aml_append(field, aml_reserved_field(4 * 8)); 406 aml_append(field, aml_named_field(CPU_DATA, 32)); 407 aml_append(cpu_ctrl_dev, field); 408 409 if (opts.has_legacy_cphp) { 410 method = aml_method("_INI", 0, AML_SERIALIZED); 411 /* switch off legacy CPU hotplug HW and use new one, 412 * on reboot system is in new mode and writing 0 413 * in CPU_SELECTOR selects BSP, which is NOP at 414 * the time _INI is called */ 415 aml_append(method, aml_store(zero, aml_name(CPU_SELECTOR))); 416 aml_append(cpu_ctrl_dev, method); 417 } 418 } 419 aml_append(sb_scope, cpu_ctrl_dev); 420 421 cpus_dev = aml_device("\\_SB.CPUS"); 422 { 423 int i; 424 Aml *ctrl_lock = aml_name("%s.%s", cphp_res_path, CPU_LOCK); 425 Aml *cpu_selector = aml_name("%s.%s", cphp_res_path, CPU_SELECTOR); 426 Aml *is_enabled = aml_name("%s.%s", cphp_res_path, CPU_ENABLED); 427 Aml *cpu_cmd = aml_name("%s.%s", cphp_res_path, CPU_COMMAND); 428 Aml *cpu_data = aml_name("%s.%s", cphp_res_path, CPU_DATA); 429 Aml *ins_evt = aml_name("%s.%s", cphp_res_path, CPU_INSERT_EVENT); 430 Aml *rm_evt = aml_name("%s.%s", cphp_res_path, CPU_REMOVE_EVENT); 431 Aml *ej_evt = aml_name("%s.%s", cphp_res_path, CPU_EJECT_EVENT); 432 433 aml_append(cpus_dev, aml_name_decl("_HID", aml_string("ACPI0010"))); 434 aml_append(cpus_dev, aml_name_decl("_CID", aml_eisaid("PNP0A05"))); 435 436 method = aml_method(CPU_NOTIFY_METHOD, 2, AML_NOTSERIALIZED); 437 for (i = 0; i < arch_ids->len; i++) { 438 Aml *cpu = aml_name(CPU_NAME_FMT, i); 439 Aml *uid = aml_arg(0); 440 Aml *event = aml_arg(1); 441 442 ifctx = aml_if(aml_equal(uid, aml_int(i))); 443 { 444 aml_append(ifctx, aml_notify(cpu, event)); 445 } 446 aml_append(method, ifctx); 447 } 448 aml_append(cpus_dev, method); 449 450 method = aml_method(CPU_STS_METHOD, 1, AML_SERIALIZED); 451 { 452 Aml *idx = aml_arg(0); 453 Aml *sta = aml_local(0); 454 455 aml_append(method, aml_acquire(ctrl_lock, 0xFFFF)); 456 aml_append(method, aml_store(idx, cpu_selector)); 457 aml_append(method, aml_store(zero, sta)); 458 ifctx = aml_if(aml_equal(is_enabled, one)); 459 { 460 aml_append(ifctx, aml_store(aml_int(0xF), sta)); 461 } 462 aml_append(method, ifctx); 463 aml_append(method, aml_release(ctrl_lock)); 464 aml_append(method, aml_return(sta)); 465 } 466 aml_append(cpus_dev, method); 467 468 method = aml_method(CPU_EJECT_METHOD, 1, AML_SERIALIZED); 469 { 470 Aml *idx = aml_arg(0); 471 472 aml_append(method, aml_acquire(ctrl_lock, 0xFFFF)); 473 aml_append(method, aml_store(idx, cpu_selector)); 474 aml_append(method, aml_store(one, ej_evt)); 475 aml_append(method, aml_release(ctrl_lock)); 476 } 477 aml_append(cpus_dev, method); 478 479 method = aml_method(CPU_SCAN_METHOD, 0, AML_SERIALIZED); 480 { 481 const uint8_t max_cpus_per_pass = 255; 482 Aml *else_ctx; 483 Aml *while_ctx, *while_ctx2; 484 Aml *has_event = aml_local(0); 485 Aml *dev_chk = aml_int(1); 486 Aml *eject_req = aml_int(3); 487 Aml *next_cpu_cmd = aml_int(CPHP_GET_NEXT_CPU_WITH_EVENT_CMD); 488 Aml *num_added_cpus = aml_local(1); 489 Aml *cpu_idx = aml_local(2); 490 Aml *uid = aml_local(3); 491 Aml *has_job = aml_local(4); 492 Aml *new_cpus = aml_name(CPU_ADDED_LIST); 493 494 aml_append(method, aml_acquire(ctrl_lock, 0xFFFF)); 495 496 /* 497 * Windows versions newer than XP (including Windows 10/Windows 498 * Server 2019), do support* VarPackageOp but, it is cripled to hold 499 * the same elements number as old PackageOp. 500 * For compatibility with Windows XP (so it won't crash) use ACPI1.0 501 * PackageOp which can hold max 255 elements. 502 * 503 * use named package as old Windows don't support it in local var 504 */ 505 aml_append(method, aml_name_decl(CPU_ADDED_LIST, 506 aml_package(max_cpus_per_pass))); 507 508 aml_append(method, aml_store(zero, uid)); 509 aml_append(method, aml_store(one, has_job)); 510 /* 511 * CPU_ADDED_LIST can hold limited number of elements, outer loop 512 * allows to process CPUs in batches which let us to handle more 513 * CPUs than CPU_ADDED_LIST can hold. 514 */ 515 while_ctx2 = aml_while(aml_equal(has_job, one)); 516 { 517 aml_append(while_ctx2, aml_store(zero, has_job)); 518 519 aml_append(while_ctx2, aml_store(one, has_event)); 520 aml_append(while_ctx2, aml_store(zero, num_added_cpus)); 521 522 /* 523 * Scan CPUs, till there are CPUs with events or 524 * CPU_ADDED_LIST capacity is exhausted 525 */ 526 while_ctx = aml_while(aml_land(aml_equal(has_event, one), 527 aml_lless(uid, aml_int(arch_ids->len)))); 528 { 529 /* 530 * clear loop exit condition, ins_evt/rm_evt checks will 531 * set it to 1 while next_cpu_cmd returns a CPU with events 532 */ 533 aml_append(while_ctx, aml_store(zero, has_event)); 534 535 aml_append(while_ctx, aml_store(uid, cpu_selector)); 536 aml_append(while_ctx, aml_store(next_cpu_cmd, cpu_cmd)); 537 538 /* 539 * wrap around case, scan is complete, exit loop. 540 * It happens since events are not cleared in scan loop, 541 * so next_cpu_cmd continues to find already processed CPUs 542 */ 543 ifctx = aml_if(aml_lless(cpu_data, uid)); 544 { 545 aml_append(ifctx, aml_break()); 546 } 547 aml_append(while_ctx, ifctx); 548 549 /* 550 * if CPU_ADDED_LIST is full, exit inner loop and process 551 * collected CPUs 552 */ 553 ifctx = aml_if( 554 aml_equal(num_added_cpus, aml_int(max_cpus_per_pass))); 555 { 556 aml_append(ifctx, aml_store(one, has_job)); 557 aml_append(ifctx, aml_break()); 558 } 559 aml_append(while_ctx, ifctx); 560 561 aml_append(while_ctx, aml_store(cpu_data, uid)); 562 ifctx = aml_if(aml_equal(ins_evt, one)); 563 { 564 /* cache added CPUs to Notify/Wakeup later */ 565 aml_append(ifctx, aml_store(uid, 566 aml_index(new_cpus, num_added_cpus))); 567 aml_append(ifctx, aml_increment(num_added_cpus)); 568 aml_append(ifctx, aml_store(one, has_event)); 569 } 570 aml_append(while_ctx, ifctx); 571 else_ctx = aml_else(); 572 ifctx = aml_if(aml_equal(rm_evt, one)); 573 { 574 aml_append(ifctx, 575 aml_call2(CPU_NOTIFY_METHOD, uid, eject_req)); 576 aml_append(ifctx, aml_store(one, rm_evt)); 577 aml_append(ifctx, aml_store(one, has_event)); 578 } 579 aml_append(else_ctx, ifctx); 580 aml_append(while_ctx, else_ctx); 581 aml_append(while_ctx, aml_increment(uid)); 582 } 583 aml_append(while_ctx2, while_ctx); 584 585 /* 586 * in case FW negotiated ICH9_LPC_SMI_F_CPU_HOTPLUG_BIT, 587 * make upcall to FW, so it can pull in new CPUs before 588 * OS is notified and wakes them up 589 */ 590 if (opts.smi_path) { 591 ifctx = aml_if(aml_lgreater(num_added_cpus, zero)); 592 { 593 aml_append(ifctx, aml_store(aml_int(OVMF_CPUHP_SMI_CMD), 594 aml_name("%s", opts.smi_path))); 595 } 596 aml_append(while_ctx2, ifctx); 597 } 598 599 /* Notify OSPM about new CPUs and clear insert events */ 600 aml_append(while_ctx2, aml_store(zero, cpu_idx)); 601 while_ctx = aml_while(aml_lless(cpu_idx, num_added_cpus)); 602 { 603 aml_append(while_ctx, 604 aml_store(aml_derefof(aml_index(new_cpus, cpu_idx)), 605 uid)); 606 aml_append(while_ctx, 607 aml_call2(CPU_NOTIFY_METHOD, uid, dev_chk)); 608 aml_append(while_ctx, aml_store(uid, aml_debug())); 609 aml_append(while_ctx, aml_store(uid, cpu_selector)); 610 aml_append(while_ctx, aml_store(one, ins_evt)); 611 aml_append(while_ctx, aml_increment(cpu_idx)); 612 } 613 aml_append(while_ctx2, while_ctx); 614 /* 615 * If another batch is needed, then it will resume scanning 616 * exactly at -- and not after -- the last CPU that's currently 617 * in CPU_ADDED_LIST. In other words, the last CPU in 618 * CPU_ADDED_LIST is going to be re-checked. That's OK: we've 619 * just cleared the insert event for *all* CPUs in 620 * CPU_ADDED_LIST, including the last one. So the scan will 621 * simply seek past it. 622 */ 623 } 624 aml_append(method, while_ctx2); 625 aml_append(method, aml_release(ctrl_lock)); 626 } 627 aml_append(cpus_dev, method); 628 629 method = aml_method(CPU_OST_METHOD, 4, AML_SERIALIZED); 630 { 631 Aml *uid = aml_arg(0); 632 Aml *ev_cmd = aml_int(CPHP_OST_EVENT_CMD); 633 Aml *st_cmd = aml_int(CPHP_OST_STATUS_CMD); 634 635 aml_append(method, aml_acquire(ctrl_lock, 0xFFFF)); 636 aml_append(method, aml_store(uid, cpu_selector)); 637 aml_append(method, aml_store(ev_cmd, cpu_cmd)); 638 aml_append(method, aml_store(aml_arg(1), cpu_data)); 639 aml_append(method, aml_store(st_cmd, cpu_cmd)); 640 aml_append(method, aml_store(aml_arg(2), cpu_data)); 641 aml_append(method, aml_release(ctrl_lock)); 642 } 643 aml_append(cpus_dev, method); 644 645 /* build Processor object for each processor */ 646 for (i = 0; i < arch_ids->len; i++) { 647 Aml *dev; 648 Aml *uid = aml_int(i); 649 GArray *madt_buf = g_array_new(0, 1, 1); 650 int arch_id = arch_ids->cpus[i].arch_id; 651 652 if (opts.acpi_1_compatible && arch_id < 255) { 653 dev = aml_processor(i, 0, 0, CPU_NAME_FMT, i); 654 } else { 655 dev = aml_device(CPU_NAME_FMT, i); 656 aml_append(dev, aml_name_decl("_HID", aml_string("ACPI0007"))); 657 aml_append(dev, aml_name_decl("_UID", uid)); 658 } 659 660 method = aml_method("_STA", 0, AML_SERIALIZED); 661 aml_append(method, aml_return(aml_call1(CPU_STS_METHOD, uid))); 662 aml_append(dev, method); 663 664 /* build _MAT object */ 665 assert(adevc && adevc->madt_cpu); 666 adevc->madt_cpu(adev, i, arch_ids, madt_buf); 667 switch (madt_buf->data[0]) { 668 case ACPI_APIC_PROCESSOR: { 669 AcpiMadtProcessorApic *apic = (void *)madt_buf->data; 670 apic->flags = cpu_to_le32(1); 671 break; 672 } 673 case ACPI_APIC_LOCAL_X2APIC: { 674 AcpiMadtProcessorX2Apic *apic = (void *)madt_buf->data; 675 apic->flags = cpu_to_le32(1); 676 break; 677 } 678 default: 679 assert(0); 680 } 681 aml_append(dev, aml_name_decl("_MAT", 682 aml_buffer(madt_buf->len, (uint8_t *)madt_buf->data))); 683 g_array_free(madt_buf, true); 684 685 if (CPU(arch_ids->cpus[i].cpu) != first_cpu) { 686 method = aml_method("_EJ0", 1, AML_NOTSERIALIZED); 687 aml_append(method, aml_call1(CPU_EJECT_METHOD, uid)); 688 aml_append(dev, method); 689 } 690 691 method = aml_method("_OST", 3, AML_SERIALIZED); 692 aml_append(method, 693 aml_call4(CPU_OST_METHOD, uid, aml_arg(0), 694 aml_arg(1), aml_arg(2)) 695 ); 696 aml_append(dev, method); 697 698 /* Linux guests discard SRAT info for non-present CPUs 699 * as a result _PXM is required for all CPUs which might 700 * be hot-plugged. For simplicity, add it for all CPUs. 701 */ 702 if (arch_ids->cpus[i].props.has_node_id) { 703 aml_append(dev, aml_name_decl("_PXM", 704 aml_int(arch_ids->cpus[i].props.node_id))); 705 } 706 707 aml_append(cpus_dev, dev); 708 } 709 } 710 aml_append(sb_scope, cpus_dev); 711 aml_append(table, sb_scope); 712 713 method = aml_method(event_handler_method, 0, AML_NOTSERIALIZED); 714 aml_append(method, aml_call0("\\_SB.CPUS." CPU_SCAN_METHOD)); 715 aml_append(table, method); 716 717 g_free(cphp_res_path); 718 } 719