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