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 #define CPU_FW_EJECT_EVENT "CEJF" 346 347 void build_cpus_aml(Aml *table, MachineState *machine, CPUHotplugFeatures opts, 348 hwaddr io_base, 349 const char *res_root, 350 const char *event_handler_method) 351 { 352 Aml *ifctx; 353 Aml *field; 354 Aml *method; 355 Aml *cpu_ctrl_dev; 356 Aml *cpus_dev; 357 Aml *zero = aml_int(0); 358 Aml *one = aml_int(1); 359 Aml *sb_scope = aml_scope("_SB"); 360 MachineClass *mc = MACHINE_GET_CLASS(machine); 361 const CPUArchIdList *arch_ids = mc->possible_cpu_arch_ids(machine); 362 char *cphp_res_path = g_strdup_printf("%s." CPUHP_RES_DEVICE, res_root); 363 Object *obj = object_resolve_path_type("", TYPE_ACPI_DEVICE_IF, NULL); 364 AcpiDeviceIfClass *adevc = ACPI_DEVICE_IF_GET_CLASS(obj); 365 AcpiDeviceIf *adev = ACPI_DEVICE_IF(obj); 366 367 cpu_ctrl_dev = aml_device("%s", cphp_res_path); 368 { 369 Aml *crs; 370 371 aml_append(cpu_ctrl_dev, 372 aml_name_decl("_HID", aml_eisaid("PNP0A06"))); 373 aml_append(cpu_ctrl_dev, 374 aml_name_decl("_UID", aml_string("CPU Hotplug resources"))); 375 aml_append(cpu_ctrl_dev, aml_mutex(CPU_LOCK, 0)); 376 377 crs = aml_resource_template(); 378 aml_append(crs, aml_io(AML_DECODE16, io_base, io_base, 1, 379 ACPI_CPU_HOTPLUG_REG_LEN)); 380 aml_append(cpu_ctrl_dev, aml_name_decl("_CRS", crs)); 381 382 /* declare CPU hotplug MMIO region with related access fields */ 383 aml_append(cpu_ctrl_dev, 384 aml_operation_region("PRST", AML_SYSTEM_IO, aml_int(io_base), 385 ACPI_CPU_HOTPLUG_REG_LEN)); 386 387 field = aml_field("PRST", AML_BYTE_ACC, AML_NOLOCK, 388 AML_WRITE_AS_ZEROS); 389 aml_append(field, aml_reserved_field(ACPI_CPU_FLAGS_OFFSET_RW * 8)); 390 /* 1 if enabled, read only */ 391 aml_append(field, aml_named_field(CPU_ENABLED, 1)); 392 /* (read) 1 if has a insert event. (write) 1 to clear event */ 393 aml_append(field, aml_named_field(CPU_INSERT_EVENT, 1)); 394 /* (read) 1 if has a remove event. (write) 1 to clear event */ 395 aml_append(field, aml_named_field(CPU_REMOVE_EVENT, 1)); 396 /* initiates device eject, write only */ 397 aml_append(field, aml_named_field(CPU_EJECT_EVENT, 1)); 398 /* tell firmware to do device eject, write only */ 399 aml_append(field, aml_named_field(CPU_FW_EJECT_EVENT, 1)); 400 aml_append(field, aml_reserved_field(3)); 401 aml_append(field, aml_named_field(CPU_COMMAND, 8)); 402 aml_append(cpu_ctrl_dev, field); 403 404 field = aml_field("PRST", AML_DWORD_ACC, AML_NOLOCK, AML_PRESERVE); 405 /* CPU selector, write only */ 406 aml_append(field, aml_named_field(CPU_SELECTOR, 32)); 407 /* flags + cmd + 2byte align */ 408 aml_append(field, aml_reserved_field(4 * 8)); 409 aml_append(field, aml_named_field(CPU_DATA, 32)); 410 aml_append(cpu_ctrl_dev, field); 411 412 if (opts.has_legacy_cphp) { 413 method = aml_method("_INI", 0, AML_SERIALIZED); 414 /* switch off legacy CPU hotplug HW and use new one, 415 * on reboot system is in new mode and writing 0 416 * in CPU_SELECTOR selects BSP, which is NOP at 417 * the time _INI is called */ 418 aml_append(method, aml_store(zero, aml_name(CPU_SELECTOR))); 419 aml_append(cpu_ctrl_dev, method); 420 } 421 } 422 aml_append(sb_scope, cpu_ctrl_dev); 423 424 cpus_dev = aml_device("\\_SB.CPUS"); 425 { 426 int i; 427 Aml *ctrl_lock = aml_name("%s.%s", cphp_res_path, CPU_LOCK); 428 Aml *cpu_selector = aml_name("%s.%s", cphp_res_path, CPU_SELECTOR); 429 Aml *is_enabled = aml_name("%s.%s", cphp_res_path, CPU_ENABLED); 430 Aml *cpu_cmd = aml_name("%s.%s", cphp_res_path, CPU_COMMAND); 431 Aml *cpu_data = aml_name("%s.%s", cphp_res_path, CPU_DATA); 432 Aml *ins_evt = aml_name("%s.%s", cphp_res_path, CPU_INSERT_EVENT); 433 Aml *rm_evt = aml_name("%s.%s", cphp_res_path, CPU_REMOVE_EVENT); 434 Aml *ej_evt = aml_name("%s.%s", cphp_res_path, CPU_EJECT_EVENT); 435 Aml *fw_ej_evt = aml_name("%s.%s", cphp_res_path, CPU_FW_EJECT_EVENT); 436 437 aml_append(cpus_dev, aml_name_decl("_HID", aml_string("ACPI0010"))); 438 aml_append(cpus_dev, aml_name_decl("_CID", aml_eisaid("PNP0A05"))); 439 440 method = aml_method(CPU_NOTIFY_METHOD, 2, AML_NOTSERIALIZED); 441 for (i = 0; i < arch_ids->len; i++) { 442 Aml *cpu = aml_name(CPU_NAME_FMT, i); 443 Aml *uid = aml_arg(0); 444 Aml *event = aml_arg(1); 445 446 ifctx = aml_if(aml_equal(uid, aml_int(i))); 447 { 448 aml_append(ifctx, aml_notify(cpu, event)); 449 } 450 aml_append(method, ifctx); 451 } 452 aml_append(cpus_dev, method); 453 454 method = aml_method(CPU_STS_METHOD, 1, AML_SERIALIZED); 455 { 456 Aml *idx = aml_arg(0); 457 Aml *sta = aml_local(0); 458 459 aml_append(method, aml_acquire(ctrl_lock, 0xFFFF)); 460 aml_append(method, aml_store(idx, cpu_selector)); 461 aml_append(method, aml_store(zero, sta)); 462 ifctx = aml_if(aml_equal(is_enabled, one)); 463 { 464 aml_append(ifctx, aml_store(aml_int(0xF), sta)); 465 } 466 aml_append(method, ifctx); 467 aml_append(method, aml_release(ctrl_lock)); 468 aml_append(method, aml_return(sta)); 469 } 470 aml_append(cpus_dev, method); 471 472 method = aml_method(CPU_EJECT_METHOD, 1, AML_SERIALIZED); 473 { 474 Aml *idx = aml_arg(0); 475 476 aml_append(method, aml_acquire(ctrl_lock, 0xFFFF)); 477 aml_append(method, aml_store(idx, cpu_selector)); 478 if (opts.fw_unplugs_cpu) { 479 aml_append(method, aml_store(one, fw_ej_evt)); 480 aml_append(method, aml_store(aml_int(OVMF_CPUHP_SMI_CMD), 481 aml_name("%s", opts.smi_path))); 482 } else { 483 aml_append(method, aml_store(one, ej_evt)); 484 } 485 aml_append(method, aml_release(ctrl_lock)); 486 } 487 aml_append(cpus_dev, method); 488 489 method = aml_method(CPU_SCAN_METHOD, 0, AML_SERIALIZED); 490 { 491 const uint8_t max_cpus_per_pass = 255; 492 Aml *else_ctx; 493 Aml *while_ctx, *while_ctx2; 494 Aml *has_event = aml_local(0); 495 Aml *dev_chk = aml_int(1); 496 Aml *eject_req = aml_int(3); 497 Aml *next_cpu_cmd = aml_int(CPHP_GET_NEXT_CPU_WITH_EVENT_CMD); 498 Aml *num_added_cpus = aml_local(1); 499 Aml *cpu_idx = aml_local(2); 500 Aml *uid = aml_local(3); 501 Aml *has_job = aml_local(4); 502 Aml *new_cpus = aml_name(CPU_ADDED_LIST); 503 504 aml_append(method, aml_acquire(ctrl_lock, 0xFFFF)); 505 506 /* 507 * Windows versions newer than XP (including Windows 10/Windows 508 * Server 2019), do support* VarPackageOp but, it is cripled to hold 509 * the same elements number as old PackageOp. 510 * For compatibility with Windows XP (so it won't crash) use ACPI1.0 511 * PackageOp which can hold max 255 elements. 512 * 513 * use named package as old Windows don't support it in local var 514 */ 515 aml_append(method, aml_name_decl(CPU_ADDED_LIST, 516 aml_package(max_cpus_per_pass))); 517 518 aml_append(method, aml_store(zero, uid)); 519 aml_append(method, aml_store(one, has_job)); 520 /* 521 * CPU_ADDED_LIST can hold limited number of elements, outer loop 522 * allows to process CPUs in batches which let us to handle more 523 * CPUs than CPU_ADDED_LIST can hold. 524 */ 525 while_ctx2 = aml_while(aml_equal(has_job, one)); 526 { 527 aml_append(while_ctx2, aml_store(zero, has_job)); 528 529 aml_append(while_ctx2, aml_store(one, has_event)); 530 aml_append(while_ctx2, aml_store(zero, num_added_cpus)); 531 532 /* 533 * Scan CPUs, till there are CPUs with events or 534 * CPU_ADDED_LIST capacity is exhausted 535 */ 536 while_ctx = aml_while(aml_land(aml_equal(has_event, one), 537 aml_lless(uid, aml_int(arch_ids->len)))); 538 { 539 /* 540 * clear loop exit condition, ins_evt/rm_evt checks will 541 * set it to 1 while next_cpu_cmd returns a CPU with events 542 */ 543 aml_append(while_ctx, aml_store(zero, has_event)); 544 545 aml_append(while_ctx, aml_store(uid, cpu_selector)); 546 aml_append(while_ctx, aml_store(next_cpu_cmd, cpu_cmd)); 547 548 /* 549 * wrap around case, scan is complete, exit loop. 550 * It happens since events are not cleared in scan loop, 551 * so next_cpu_cmd continues to find already processed CPUs 552 */ 553 ifctx = aml_if(aml_lless(cpu_data, uid)); 554 { 555 aml_append(ifctx, aml_break()); 556 } 557 aml_append(while_ctx, ifctx); 558 559 /* 560 * if CPU_ADDED_LIST is full, exit inner loop and process 561 * collected CPUs 562 */ 563 ifctx = aml_if( 564 aml_equal(num_added_cpus, aml_int(max_cpus_per_pass))); 565 { 566 aml_append(ifctx, aml_store(one, has_job)); 567 aml_append(ifctx, aml_break()); 568 } 569 aml_append(while_ctx, ifctx); 570 571 aml_append(while_ctx, aml_store(cpu_data, uid)); 572 ifctx = aml_if(aml_equal(ins_evt, one)); 573 { 574 /* cache added CPUs to Notify/Wakeup later */ 575 aml_append(ifctx, aml_store(uid, 576 aml_index(new_cpus, num_added_cpus))); 577 aml_append(ifctx, aml_increment(num_added_cpus)); 578 aml_append(ifctx, aml_store(one, has_event)); 579 } 580 aml_append(while_ctx, ifctx); 581 else_ctx = aml_else(); 582 ifctx = aml_if(aml_equal(rm_evt, one)); 583 { 584 aml_append(ifctx, 585 aml_call2(CPU_NOTIFY_METHOD, uid, eject_req)); 586 aml_append(ifctx, aml_store(one, rm_evt)); 587 aml_append(ifctx, aml_store(one, has_event)); 588 } 589 aml_append(else_ctx, ifctx); 590 aml_append(while_ctx, else_ctx); 591 aml_append(while_ctx, aml_increment(uid)); 592 } 593 aml_append(while_ctx2, while_ctx); 594 595 /* 596 * in case FW negotiated ICH9_LPC_SMI_F_CPU_HOTPLUG_BIT, 597 * make upcall to FW, so it can pull in new CPUs before 598 * OS is notified and wakes them up 599 */ 600 if (opts.smi_path) { 601 ifctx = aml_if(aml_lgreater(num_added_cpus, zero)); 602 { 603 aml_append(ifctx, aml_store(aml_int(OVMF_CPUHP_SMI_CMD), 604 aml_name("%s", opts.smi_path))); 605 } 606 aml_append(while_ctx2, ifctx); 607 } 608 609 /* Notify OSPM about new CPUs and clear insert events */ 610 aml_append(while_ctx2, aml_store(zero, cpu_idx)); 611 while_ctx = aml_while(aml_lless(cpu_idx, num_added_cpus)); 612 { 613 aml_append(while_ctx, 614 aml_store(aml_derefof(aml_index(new_cpus, cpu_idx)), 615 uid)); 616 aml_append(while_ctx, 617 aml_call2(CPU_NOTIFY_METHOD, uid, dev_chk)); 618 aml_append(while_ctx, aml_store(uid, aml_debug())); 619 aml_append(while_ctx, aml_store(uid, cpu_selector)); 620 aml_append(while_ctx, aml_store(one, ins_evt)); 621 aml_append(while_ctx, aml_increment(cpu_idx)); 622 } 623 aml_append(while_ctx2, while_ctx); 624 /* 625 * If another batch is needed, then it will resume scanning 626 * exactly at -- and not after -- the last CPU that's currently 627 * in CPU_ADDED_LIST. In other words, the last CPU in 628 * CPU_ADDED_LIST is going to be re-checked. That's OK: we've 629 * just cleared the insert event for *all* CPUs in 630 * CPU_ADDED_LIST, including the last one. So the scan will 631 * simply seek past it. 632 */ 633 } 634 aml_append(method, while_ctx2); 635 aml_append(method, aml_release(ctrl_lock)); 636 } 637 aml_append(cpus_dev, method); 638 639 method = aml_method(CPU_OST_METHOD, 4, AML_SERIALIZED); 640 { 641 Aml *uid = aml_arg(0); 642 Aml *ev_cmd = aml_int(CPHP_OST_EVENT_CMD); 643 Aml *st_cmd = aml_int(CPHP_OST_STATUS_CMD); 644 645 aml_append(method, aml_acquire(ctrl_lock, 0xFFFF)); 646 aml_append(method, aml_store(uid, cpu_selector)); 647 aml_append(method, aml_store(ev_cmd, cpu_cmd)); 648 aml_append(method, aml_store(aml_arg(1), cpu_data)); 649 aml_append(method, aml_store(st_cmd, cpu_cmd)); 650 aml_append(method, aml_store(aml_arg(2), cpu_data)); 651 aml_append(method, aml_release(ctrl_lock)); 652 } 653 aml_append(cpus_dev, method); 654 655 /* build Processor object for each processor */ 656 for (i = 0; i < arch_ids->len; i++) { 657 Aml *dev; 658 Aml *uid = aml_int(i); 659 GArray *madt_buf = g_array_new(0, 1, 1); 660 int arch_id = arch_ids->cpus[i].arch_id; 661 662 if (opts.acpi_1_compatible && arch_id < 255) { 663 dev = aml_processor(i, 0, 0, CPU_NAME_FMT, i); 664 } else { 665 dev = aml_device(CPU_NAME_FMT, i); 666 aml_append(dev, aml_name_decl("_HID", aml_string("ACPI0007"))); 667 aml_append(dev, aml_name_decl("_UID", uid)); 668 } 669 670 method = aml_method("_STA", 0, AML_SERIALIZED); 671 aml_append(method, aml_return(aml_call1(CPU_STS_METHOD, uid))); 672 aml_append(dev, method); 673 674 /* build _MAT object */ 675 assert(adevc && adevc->madt_cpu); 676 adevc->madt_cpu(adev, i, arch_ids, madt_buf); 677 switch (madt_buf->data[0]) { 678 case ACPI_APIC_PROCESSOR: { 679 AcpiMadtProcessorApic *apic = (void *)madt_buf->data; 680 apic->flags = cpu_to_le32(1); 681 break; 682 } 683 case ACPI_APIC_LOCAL_X2APIC: { 684 AcpiMadtProcessorX2Apic *apic = (void *)madt_buf->data; 685 apic->flags = cpu_to_le32(1); 686 break; 687 } 688 default: 689 assert(0); 690 } 691 aml_append(dev, aml_name_decl("_MAT", 692 aml_buffer(madt_buf->len, (uint8_t *)madt_buf->data))); 693 g_array_free(madt_buf, true); 694 695 if (CPU(arch_ids->cpus[i].cpu) != first_cpu) { 696 method = aml_method("_EJ0", 1, AML_NOTSERIALIZED); 697 aml_append(method, aml_call1(CPU_EJECT_METHOD, uid)); 698 aml_append(dev, method); 699 } 700 701 method = aml_method("_OST", 3, AML_SERIALIZED); 702 aml_append(method, 703 aml_call4(CPU_OST_METHOD, uid, aml_arg(0), 704 aml_arg(1), aml_arg(2)) 705 ); 706 aml_append(dev, method); 707 708 /* Linux guests discard SRAT info for non-present CPUs 709 * as a result _PXM is required for all CPUs which might 710 * be hot-plugged. For simplicity, add it for all CPUs. 711 */ 712 if (arch_ids->cpus[i].props.has_node_id) { 713 aml_append(dev, aml_name_decl("_PXM", 714 aml_int(arch_ids->cpus[i].props.node_id))); 715 } 716 717 aml_append(cpus_dev, dev); 718 } 719 } 720 aml_append(sb_scope, cpus_dev); 721 aml_append(table, sb_scope); 722 723 method = aml_method(event_handler_method, 0, AML_NOTSERIALIZED); 724 aml_append(method, aml_call0("\\_SB.CPUS." CPU_SCAN_METHOD)); 725 aml_append(table, method); 726 727 g_free(cphp_res_path); 728 } 729