1 #include "qemu/osdep.h" 2 #include "migration/vmstate.h" 3 #include "hw/acpi/cpu.h" 4 #include "hw/core/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_SELECTOR_OFFSET_WR 0 11 #define ACPI_CPU_FLAGS_OFFSET_RW 4 12 #define ACPI_CPU_CMD_OFFSET_WR 5 13 #define ACPI_CPU_CMD_DATA_OFFSET_RW 8 14 #define ACPI_CPU_CMD_DATA2_OFFSET_R 0 15 16 #define OVMF_CPUHP_SMI_CMD 4 17 18 enum { 19 CPHP_GET_NEXT_CPU_WITH_EVENT_CMD = 0, 20 CPHP_OST_EVENT_CMD = 1, 21 CPHP_OST_STATUS_CMD = 2, 22 CPHP_GET_CPU_ID_CMD = 3, 23 CPHP_CMD_MAX 24 }; 25 26 static ACPIOSTInfo *acpi_cpu_device_status(int idx, AcpiCpuStatus *cdev) 27 { 28 ACPIOSTInfo *info = g_new0(ACPIOSTInfo, 1); 29 30 info->slot_type = ACPI_SLOT_TYPE_CPU; 31 info->slot = g_strdup_printf("%d", idx); 32 info->source = cdev->ost_event; 33 info->status = cdev->ost_status; 34 if (cdev->cpu) { 35 DeviceState *dev = DEVICE(cdev->cpu); 36 if (dev->id) { 37 info->device = g_strdup(dev->id); 38 } 39 } 40 return info; 41 } 42 43 void acpi_cpu_ospm_status(CPUHotplugState *cpu_st, ACPIOSTInfoList ***list) 44 { 45 ACPIOSTInfoList ***tail = list; 46 int i; 47 48 for (i = 0; i < cpu_st->dev_count; i++) { 49 QAPI_LIST_APPEND(*tail, acpi_cpu_device_status(i, &cpu_st->devs[i])); 50 } 51 } 52 53 static uint64_t cpu_hotplug_rd(void *opaque, hwaddr addr, unsigned size) 54 { 55 uint64_t val = 0; 56 CPUHotplugState *cpu_st = opaque; 57 AcpiCpuStatus *cdev; 58 59 if (cpu_st->selector >= cpu_st->dev_count) { 60 return val; 61 } 62 63 cdev = &cpu_st->devs[cpu_st->selector]; 64 switch (addr) { 65 case ACPI_CPU_FLAGS_OFFSET_RW: /* pack and return is_* fields */ 66 val |= cdev->cpu ? 1 : 0; 67 val |= cdev->is_inserting ? 2 : 0; 68 val |= cdev->is_removing ? 4 : 0; 69 val |= cdev->fw_remove ? 16 : 0; 70 trace_cpuhp_acpi_read_flags(cpu_st->selector, val); 71 break; 72 case ACPI_CPU_CMD_DATA_OFFSET_RW: 73 switch (cpu_st->command) { 74 case CPHP_GET_NEXT_CPU_WITH_EVENT_CMD: 75 val = cpu_st->selector; 76 break; 77 case CPHP_GET_CPU_ID_CMD: 78 val = cdev->arch_id & 0xFFFFFFFF; 79 break; 80 default: 81 break; 82 } 83 trace_cpuhp_acpi_read_cmd_data(cpu_st->selector, val); 84 break; 85 case ACPI_CPU_CMD_DATA2_OFFSET_R: 86 switch (cpu_st->command) { 87 case CPHP_GET_NEXT_CPU_WITH_EVENT_CMD: 88 val = 0; 89 break; 90 case CPHP_GET_CPU_ID_CMD: 91 val = cdev->arch_id >> 32; 92 break; 93 default: 94 break; 95 } 96 trace_cpuhp_acpi_read_cmd_data2(cpu_st->selector, val); 97 break; 98 default: 99 break; 100 } 101 return val; 102 } 103 104 static void cpu_hotplug_wr(void *opaque, hwaddr addr, uint64_t data, 105 unsigned int size) 106 { 107 CPUHotplugState *cpu_st = opaque; 108 AcpiCpuStatus *cdev; 109 ACPIOSTInfo *info; 110 111 assert(cpu_st->dev_count); 112 113 if (addr) { 114 if (cpu_st->selector >= cpu_st->dev_count) { 115 trace_cpuhp_acpi_invalid_idx_selected(cpu_st->selector); 116 return; 117 } 118 } 119 120 switch (addr) { 121 case ACPI_CPU_SELECTOR_OFFSET_WR: /* current CPU selector */ 122 cpu_st->selector = data; 123 trace_cpuhp_acpi_write_idx(cpu_st->selector); 124 break; 125 case ACPI_CPU_FLAGS_OFFSET_RW: /* set is_* fields */ 126 cdev = &cpu_st->devs[cpu_st->selector]; 127 if (data & 2) { /* clear insert event */ 128 cdev->is_inserting = false; 129 trace_cpuhp_acpi_clear_inserting_evt(cpu_st->selector); 130 } else if (data & 4) { /* clear remove event */ 131 cdev->is_removing = false; 132 trace_cpuhp_acpi_clear_remove_evt(cpu_st->selector); 133 } else if (data & 8) { 134 DeviceState *dev = NULL; 135 HotplugHandler *hotplug_ctrl = NULL; 136 137 if (!cdev->cpu || cdev->cpu == first_cpu) { 138 trace_cpuhp_acpi_ejecting_invalid_cpu(cpu_st->selector); 139 break; 140 } 141 142 trace_cpuhp_acpi_ejecting_cpu(cpu_st->selector); 143 dev = DEVICE(cdev->cpu); 144 hotplug_ctrl = qdev_get_hotplug_handler(dev); 145 hotplug_handler_unplug(hotplug_ctrl, dev, NULL); 146 object_unparent(OBJECT(dev)); 147 cdev->fw_remove = false; 148 } else if (data & 16) { 149 if (!cdev->cpu || cdev->cpu == first_cpu) { 150 trace_cpuhp_acpi_fw_remove_invalid_cpu(cpu_st->selector); 151 break; 152 } 153 trace_cpuhp_acpi_fw_remove_cpu(cpu_st->selector); 154 cdev->fw_remove = true; 155 } 156 break; 157 case ACPI_CPU_CMD_OFFSET_WR: 158 trace_cpuhp_acpi_write_cmd(cpu_st->selector, data); 159 if (data < CPHP_CMD_MAX) { 160 cpu_st->command = data; 161 if (cpu_st->command == CPHP_GET_NEXT_CPU_WITH_EVENT_CMD) { 162 uint32_t iter = cpu_st->selector; 163 164 do { 165 cdev = &cpu_st->devs[iter]; 166 if (cdev->is_inserting || cdev->is_removing || 167 cdev->fw_remove) { 168 cpu_st->selector = iter; 169 trace_cpuhp_acpi_cpu_has_events(cpu_st->selector, 170 cdev->is_inserting, cdev->is_removing); 171 break; 172 } 173 iter = iter + 1 < cpu_st->dev_count ? iter + 1 : 0; 174 } while (iter != cpu_st->selector); 175 } 176 } 177 break; 178 case ACPI_CPU_CMD_DATA_OFFSET_RW: 179 switch (cpu_st->command) { 180 case CPHP_OST_EVENT_CMD: { 181 cdev = &cpu_st->devs[cpu_st->selector]; 182 cdev->ost_event = data; 183 trace_cpuhp_acpi_write_ost_ev(cpu_st->selector, cdev->ost_event); 184 break; 185 } 186 case CPHP_OST_STATUS_CMD: { 187 cdev = &cpu_st->devs[cpu_st->selector]; 188 cdev->ost_status = data; 189 info = acpi_cpu_device_status(cpu_st->selector, cdev); 190 qapi_event_send_acpi_device_ost(info); 191 qapi_free_ACPIOSTInfo(info); 192 trace_cpuhp_acpi_write_ost_status(cpu_st->selector, 193 cdev->ost_status); 194 break; 195 } 196 default: 197 break; 198 } 199 break; 200 default: 201 break; 202 } 203 } 204 205 static const MemoryRegionOps cpu_hotplug_ops = { 206 .read = cpu_hotplug_rd, 207 .write = cpu_hotplug_wr, 208 .endianness = DEVICE_LITTLE_ENDIAN, 209 .valid = { 210 .min_access_size = 1, 211 .max_access_size = 4, 212 }, 213 }; 214 215 void cpu_hotplug_hw_init(MemoryRegion *as, Object *owner, 216 CPUHotplugState *state, hwaddr base_addr) 217 { 218 MachineState *machine = MACHINE(qdev_get_machine()); 219 MachineClass *mc = MACHINE_GET_CLASS(machine); 220 const CPUArchIdList *id_list; 221 int i; 222 223 assert(mc->possible_cpu_arch_ids); 224 id_list = mc->possible_cpu_arch_ids(machine); 225 state->dev_count = id_list->len; 226 state->devs = g_new0(typeof(*state->devs), state->dev_count); 227 for (i = 0; i < id_list->len; i++) { 228 state->devs[i].cpu = CPU(id_list->cpus[i].cpu); 229 state->devs[i].arch_id = id_list->cpus[i].arch_id; 230 } 231 memory_region_init_io(&state->ctrl_reg, owner, &cpu_hotplug_ops, state, 232 "acpi-cpu-hotplug", ACPI_CPU_HOTPLUG_REG_LEN); 233 memory_region_add_subregion(as, base_addr, &state->ctrl_reg); 234 } 235 236 static bool should_remain_acpi_present(DeviceState *dev) 237 { 238 CPUClass *k = CPU_GET_CLASS(dev); 239 /* 240 * A system may contain CPUs that are always present on one die, NUMA node, 241 * or socket, yet may be non-present on another simultaneously. Check from 242 * architecture specific code. 243 */ 244 return k->cpu_persistent_status && k->cpu_persistent_status(CPU(dev)); 245 } 246 247 static AcpiCpuStatus *get_cpu_status(CPUHotplugState *cpu_st, DeviceState *dev) 248 { 249 CPUClass *k = CPU_GET_CLASS(dev); 250 uint64_t cpu_arch_id = k->get_arch_id(CPU(dev)); 251 int i; 252 253 for (i = 0; i < cpu_st->dev_count; i++) { 254 if (cpu_arch_id == cpu_st->devs[i].arch_id) { 255 return &cpu_st->devs[i]; 256 } 257 } 258 return NULL; 259 } 260 261 void acpi_cpu_plug_cb(HotplugHandler *hotplug_dev, 262 CPUHotplugState *cpu_st, DeviceState *dev, Error **errp) 263 { 264 AcpiCpuStatus *cdev; 265 266 cdev = get_cpu_status(cpu_st, dev); 267 if (!cdev) { 268 return; 269 } 270 271 cdev->cpu = CPU(dev); 272 if (dev->hotplugged) { 273 cdev->is_inserting = true; 274 acpi_send_event(DEVICE(hotplug_dev), ACPI_CPU_HOTPLUG_STATUS); 275 } 276 } 277 278 void acpi_cpu_unplug_request_cb(HotplugHandler *hotplug_dev, 279 CPUHotplugState *cpu_st, 280 DeviceState *dev, Error **errp) 281 { 282 AcpiCpuStatus *cdev; 283 284 cdev = get_cpu_status(cpu_st, dev); 285 if (!cdev) { 286 return; 287 } 288 289 cdev->is_removing = true; 290 acpi_send_event(DEVICE(hotplug_dev), ACPI_CPU_HOTPLUG_STATUS); 291 } 292 293 void acpi_cpu_unplug_cb(CPUHotplugState *cpu_st, 294 DeviceState *dev, Error **errp) 295 { 296 AcpiCpuStatus *cdev; 297 298 cdev = get_cpu_status(cpu_st, dev); 299 if (!cdev) { 300 return; 301 } 302 303 if (!should_remain_acpi_present(dev)) { 304 cdev->cpu = NULL; 305 } 306 } 307 308 static const VMStateDescription vmstate_cpuhp_sts = { 309 .name = "CPU hotplug device state", 310 .version_id = 1, 311 .minimum_version_id = 1, 312 .fields = (const VMStateField[]) { 313 VMSTATE_BOOL(is_inserting, AcpiCpuStatus), 314 VMSTATE_BOOL(is_removing, AcpiCpuStatus), 315 VMSTATE_UINT32(ost_event, AcpiCpuStatus), 316 VMSTATE_UINT32(ost_status, AcpiCpuStatus), 317 VMSTATE_END_OF_LIST() 318 } 319 }; 320 321 const VMStateDescription vmstate_cpu_hotplug = { 322 .name = "CPU hotplug state", 323 .version_id = 1, 324 .minimum_version_id = 1, 325 .fields = (const VMStateField[]) { 326 VMSTATE_UINT32(selector, CPUHotplugState), 327 VMSTATE_UINT8(command, CPUHotplugState), 328 VMSTATE_STRUCT_VARRAY_POINTER_UINT32(devs, CPUHotplugState, dev_count, 329 vmstate_cpuhp_sts, AcpiCpuStatus), 330 VMSTATE_END_OF_LIST() 331 } 332 }; 333 334 #define CPU_NAME_FMT "C%.03X" 335 #define CPUHP_RES_DEVICE "PRES" 336 #define CPU_LOCK "CPLK" 337 #define CPU_STS_METHOD "CSTA" 338 #define CPU_SCAN_METHOD "CSCN" 339 #define CPU_NOTIFY_METHOD "CTFY" 340 #define CPU_EJECT_METHOD "CEJ0" 341 #define CPU_OST_METHOD "COST" 342 #define CPU_ADDED_LIST "CNEW" 343 344 #define CPU_ENABLED "CPEN" 345 #define CPU_SELECTOR "CSEL" 346 #define CPU_COMMAND "CCMD" 347 #define CPU_DATA "CDAT" 348 #define CPU_INSERT_EVENT "CINS" 349 #define CPU_REMOVE_EVENT "CRMV" 350 #define CPU_EJECT_EVENT "CEJ0" 351 #define CPU_FW_EJECT_EVENT "CEJF" 352 353 void build_cpus_aml(Aml *table, MachineState *machine, CPUHotplugFeatures opts, 354 build_madt_cpu_fn build_madt_cpu, hwaddr base_addr, 355 const char *res_root, 356 const char *event_handler_method, 357 AmlRegionSpace rs) 358 { 359 Aml *ifctx; 360 Aml *field; 361 Aml *method; 362 Aml *cpu_ctrl_dev; 363 Aml *cpus_dev; 364 Aml *zero = aml_int(0); 365 Aml *one = aml_int(1); 366 Aml *sb_scope = aml_scope("_SB"); 367 MachineClass *mc = MACHINE_GET_CLASS(machine); 368 const CPUArchIdList *arch_ids = mc->possible_cpu_arch_ids(machine); 369 char *cphp_res_path = g_strdup_printf("%s." CPUHP_RES_DEVICE, res_root); 370 371 cpu_ctrl_dev = aml_device("%s", cphp_res_path); 372 { 373 Aml *crs; 374 375 aml_append(cpu_ctrl_dev, 376 aml_name_decl("_HID", aml_eisaid("PNP0A06"))); 377 aml_append(cpu_ctrl_dev, 378 aml_name_decl("_UID", aml_string("CPU Hotplug resources"))); 379 aml_append(cpu_ctrl_dev, aml_mutex(CPU_LOCK, 0)); 380 381 assert((rs == AML_SYSTEM_IO) || (rs == AML_SYSTEM_MEMORY)); 382 383 crs = aml_resource_template(); 384 if (rs == AML_SYSTEM_IO) { 385 aml_append(crs, aml_io(AML_DECODE16, base_addr, base_addr, 1, 386 ACPI_CPU_HOTPLUG_REG_LEN)); 387 } else if (rs == AML_SYSTEM_MEMORY) { 388 aml_append(crs, aml_memory32_fixed(base_addr, 389 ACPI_CPU_HOTPLUG_REG_LEN, AML_READ_WRITE)); 390 } 391 392 aml_append(cpu_ctrl_dev, aml_name_decl("_CRS", crs)); 393 394 /* declare CPU hotplug MMIO region with related access fields */ 395 aml_append(cpu_ctrl_dev, 396 aml_operation_region("PRST", rs, aml_int(base_addr), 397 ACPI_CPU_HOTPLUG_REG_LEN)); 398 399 field = aml_field("PRST", AML_BYTE_ACC, AML_NOLOCK, 400 AML_WRITE_AS_ZEROS); 401 aml_append(field, aml_reserved_field(ACPI_CPU_FLAGS_OFFSET_RW * 8)); 402 /* 1 if enabled, read only */ 403 aml_append(field, aml_named_field(CPU_ENABLED, 1)); 404 /* (read) 1 if has a insert event. (write) 1 to clear event */ 405 aml_append(field, aml_named_field(CPU_INSERT_EVENT, 1)); 406 /* (read) 1 if has a remove event. (write) 1 to clear event */ 407 aml_append(field, aml_named_field(CPU_REMOVE_EVENT, 1)); 408 /* initiates device eject, write only */ 409 aml_append(field, aml_named_field(CPU_EJECT_EVENT, 1)); 410 /* tell firmware to do device eject, write only */ 411 aml_append(field, aml_named_field(CPU_FW_EJECT_EVENT, 1)); 412 aml_append(field, aml_reserved_field(3)); 413 aml_append(field, aml_named_field(CPU_COMMAND, 8)); 414 aml_append(cpu_ctrl_dev, field); 415 416 field = aml_field("PRST", AML_DWORD_ACC, AML_NOLOCK, AML_PRESERVE); 417 /* CPU selector, write only */ 418 aml_append(field, aml_named_field(CPU_SELECTOR, 32)); 419 /* flags + cmd + 2byte align */ 420 aml_append(field, aml_reserved_field(4 * 8)); 421 aml_append(field, aml_named_field(CPU_DATA, 32)); 422 aml_append(cpu_ctrl_dev, field); 423 424 if (opts.has_legacy_cphp) { 425 method = aml_method("_INI", 0, AML_SERIALIZED); 426 /* switch off legacy CPU hotplug HW and use new one, 427 * on reboot system is in new mode and writing 0 428 * in CPU_SELECTOR selects BSP, which is NOP at 429 * the time _INI is called */ 430 aml_append(method, aml_store(zero, aml_name(CPU_SELECTOR))); 431 aml_append(cpu_ctrl_dev, method); 432 } 433 } 434 aml_append(sb_scope, cpu_ctrl_dev); 435 436 cpus_dev = aml_device("\\_SB.CPUS"); 437 { 438 int i; 439 Aml *ctrl_lock = aml_name("%s.%s", cphp_res_path, CPU_LOCK); 440 Aml *cpu_selector = aml_name("%s.%s", cphp_res_path, CPU_SELECTOR); 441 Aml *is_enabled = aml_name("%s.%s", cphp_res_path, CPU_ENABLED); 442 Aml *cpu_cmd = aml_name("%s.%s", cphp_res_path, CPU_COMMAND); 443 Aml *cpu_data = aml_name("%s.%s", cphp_res_path, CPU_DATA); 444 Aml *ins_evt = aml_name("%s.%s", cphp_res_path, CPU_INSERT_EVENT); 445 Aml *rm_evt = aml_name("%s.%s", cphp_res_path, CPU_REMOVE_EVENT); 446 Aml *ej_evt = aml_name("%s.%s", cphp_res_path, CPU_EJECT_EVENT); 447 Aml *fw_ej_evt = aml_name("%s.%s", cphp_res_path, CPU_FW_EJECT_EVENT); 448 449 aml_append(cpus_dev, aml_name_decl("_HID", aml_string("ACPI0010"))); 450 aml_append(cpus_dev, aml_name_decl("_CID", aml_eisaid("PNP0A05"))); 451 452 method = aml_method(CPU_NOTIFY_METHOD, 2, AML_NOTSERIALIZED); 453 for (i = 0; i < arch_ids->len; i++) { 454 Aml *cpu = aml_name(CPU_NAME_FMT, i); 455 Aml *uid = aml_arg(0); 456 Aml *event = aml_arg(1); 457 458 ifctx = aml_if(aml_equal(uid, aml_int(i))); 459 { 460 aml_append(ifctx, aml_notify(cpu, event)); 461 } 462 aml_append(method, ifctx); 463 } 464 aml_append(cpus_dev, method); 465 466 method = aml_method(CPU_STS_METHOD, 1, AML_SERIALIZED); 467 { 468 Aml *idx = aml_arg(0); 469 Aml *sta = aml_local(0); 470 471 aml_append(method, aml_acquire(ctrl_lock, 0xFFFF)); 472 aml_append(method, aml_store(idx, cpu_selector)); 473 aml_append(method, aml_store(zero, sta)); 474 ifctx = aml_if(aml_equal(is_enabled, one)); 475 { 476 aml_append(ifctx, aml_store(aml_int(0xF), sta)); 477 } 478 aml_append(method, ifctx); 479 aml_append(method, aml_release(ctrl_lock)); 480 aml_append(method, aml_return(sta)); 481 } 482 aml_append(cpus_dev, method); 483 484 method = aml_method(CPU_EJECT_METHOD, 1, AML_SERIALIZED); 485 { 486 Aml *idx = aml_arg(0); 487 488 aml_append(method, aml_acquire(ctrl_lock, 0xFFFF)); 489 aml_append(method, aml_store(idx, cpu_selector)); 490 if (opts.fw_unplugs_cpu) { 491 aml_append(method, aml_store(one, fw_ej_evt)); 492 aml_append(method, aml_store(aml_int(OVMF_CPUHP_SMI_CMD), 493 aml_name("%s", opts.smi_path))); 494 } else { 495 aml_append(method, aml_store(one, ej_evt)); 496 } 497 aml_append(method, aml_release(ctrl_lock)); 498 } 499 aml_append(cpus_dev, method); 500 501 method = aml_method(CPU_SCAN_METHOD, 0, AML_SERIALIZED); 502 { 503 const uint8_t max_cpus_per_pass = 255; 504 Aml *else_ctx; 505 Aml *while_ctx, *while_ctx2; 506 Aml *has_event = aml_local(0); 507 Aml *dev_chk = aml_int(1); 508 Aml *eject_req = aml_int(3); 509 Aml *next_cpu_cmd = aml_int(CPHP_GET_NEXT_CPU_WITH_EVENT_CMD); 510 Aml *num_added_cpus = aml_local(1); 511 Aml *cpu_idx = aml_local(2); 512 Aml *uid = aml_local(3); 513 Aml *has_job = aml_local(4); 514 Aml *new_cpus = aml_name(CPU_ADDED_LIST); 515 516 aml_append(method, aml_acquire(ctrl_lock, 0xFFFF)); 517 518 /* 519 * Windows versions newer than XP (including Windows 10/Windows 520 * Server 2019), do support* VarPackageOp but, it is cripled to hold 521 * the same elements number as old PackageOp. 522 * For compatibility with Windows XP (so it won't crash) use ACPI1.0 523 * PackageOp which can hold max 255 elements. 524 * 525 * use named package as old Windows don't support it in local var 526 */ 527 aml_append(method, aml_name_decl(CPU_ADDED_LIST, 528 aml_package(max_cpus_per_pass))); 529 530 aml_append(method, aml_store(zero, uid)); 531 aml_append(method, aml_store(one, has_job)); 532 /* 533 * CPU_ADDED_LIST can hold limited number of elements, outer loop 534 * allows to process CPUs in batches which let us to handle more 535 * CPUs than CPU_ADDED_LIST can hold. 536 */ 537 while_ctx2 = aml_while(aml_equal(has_job, one)); 538 { 539 aml_append(while_ctx2, aml_store(zero, has_job)); 540 541 aml_append(while_ctx2, aml_store(one, has_event)); 542 aml_append(while_ctx2, aml_store(zero, num_added_cpus)); 543 544 /* 545 * Scan CPUs, till there are CPUs with events or 546 * CPU_ADDED_LIST capacity is exhausted 547 */ 548 while_ctx = aml_while(aml_land(aml_equal(has_event, one), 549 aml_lless(uid, aml_int(arch_ids->len)))); 550 { 551 /* 552 * clear loop exit condition, ins_evt/rm_evt checks will 553 * set it to 1 while next_cpu_cmd returns a CPU with events 554 */ 555 aml_append(while_ctx, aml_store(zero, has_event)); 556 557 aml_append(while_ctx, aml_store(uid, cpu_selector)); 558 aml_append(while_ctx, aml_store(next_cpu_cmd, cpu_cmd)); 559 560 /* 561 * wrap around case, scan is complete, exit loop. 562 * It happens since events are not cleared in scan loop, 563 * so next_cpu_cmd continues to find already processed CPUs 564 */ 565 ifctx = aml_if(aml_lless(cpu_data, uid)); 566 { 567 aml_append(ifctx, aml_break()); 568 } 569 aml_append(while_ctx, ifctx); 570 571 /* 572 * if CPU_ADDED_LIST is full, exit inner loop and process 573 * collected CPUs 574 */ 575 ifctx = aml_if( 576 aml_equal(num_added_cpus, aml_int(max_cpus_per_pass))); 577 { 578 aml_append(ifctx, aml_store(one, has_job)); 579 aml_append(ifctx, aml_break()); 580 } 581 aml_append(while_ctx, ifctx); 582 583 aml_append(while_ctx, aml_store(cpu_data, uid)); 584 ifctx = aml_if(aml_equal(ins_evt, one)); 585 { 586 /* cache added CPUs to Notify/Wakeup later */ 587 aml_append(ifctx, aml_store(uid, 588 aml_index(new_cpus, num_added_cpus))); 589 aml_append(ifctx, aml_increment(num_added_cpus)); 590 aml_append(ifctx, aml_store(one, has_event)); 591 } 592 aml_append(while_ctx, ifctx); 593 else_ctx = aml_else(); 594 ifctx = aml_if(aml_equal(rm_evt, one)); 595 { 596 aml_append(ifctx, 597 aml_call2(CPU_NOTIFY_METHOD, uid, eject_req)); 598 aml_append(ifctx, aml_store(one, rm_evt)); 599 aml_append(ifctx, aml_store(one, has_event)); 600 } 601 aml_append(else_ctx, ifctx); 602 aml_append(while_ctx, else_ctx); 603 aml_append(while_ctx, aml_increment(uid)); 604 } 605 aml_append(while_ctx2, while_ctx); 606 607 /* 608 * in case FW negotiated ICH9_LPC_SMI_F_CPU_HOTPLUG_BIT, 609 * make upcall to FW, so it can pull in new CPUs before 610 * OS is notified and wakes them up 611 */ 612 if (opts.smi_path) { 613 ifctx = aml_if(aml_lgreater(num_added_cpus, zero)); 614 { 615 aml_append(ifctx, aml_store(aml_int(OVMF_CPUHP_SMI_CMD), 616 aml_name("%s", opts.smi_path))); 617 } 618 aml_append(while_ctx2, ifctx); 619 } 620 621 /* Notify OSPM about new CPUs and clear insert events */ 622 aml_append(while_ctx2, aml_store(zero, cpu_idx)); 623 while_ctx = aml_while(aml_lless(cpu_idx, num_added_cpus)); 624 { 625 aml_append(while_ctx, 626 aml_store(aml_derefof(aml_index(new_cpus, cpu_idx)), 627 uid)); 628 aml_append(while_ctx, 629 aml_call2(CPU_NOTIFY_METHOD, uid, dev_chk)); 630 aml_append(while_ctx, aml_store(uid, aml_debug())); 631 aml_append(while_ctx, aml_store(uid, cpu_selector)); 632 aml_append(while_ctx, aml_store(one, ins_evt)); 633 aml_append(while_ctx, aml_increment(cpu_idx)); 634 } 635 aml_append(while_ctx2, while_ctx); 636 /* 637 * If another batch is needed, then it will resume scanning 638 * exactly at -- and not after -- the last CPU that's currently 639 * in CPU_ADDED_LIST. In other words, the last CPU in 640 * CPU_ADDED_LIST is going to be re-checked. That's OK: we've 641 * just cleared the insert event for *all* CPUs in 642 * CPU_ADDED_LIST, including the last one. So the scan will 643 * simply seek past it. 644 */ 645 } 646 aml_append(method, while_ctx2); 647 aml_append(method, aml_release(ctrl_lock)); 648 } 649 aml_append(cpus_dev, method); 650 651 method = aml_method(CPU_OST_METHOD, 4, AML_SERIALIZED); 652 { 653 Aml *uid = aml_arg(0); 654 Aml *ev_cmd = aml_int(CPHP_OST_EVENT_CMD); 655 Aml *st_cmd = aml_int(CPHP_OST_STATUS_CMD); 656 657 aml_append(method, aml_acquire(ctrl_lock, 0xFFFF)); 658 aml_append(method, aml_store(uid, cpu_selector)); 659 aml_append(method, aml_store(ev_cmd, cpu_cmd)); 660 aml_append(method, aml_store(aml_arg(1), cpu_data)); 661 aml_append(method, aml_store(st_cmd, cpu_cmd)); 662 aml_append(method, aml_store(aml_arg(2), cpu_data)); 663 aml_append(method, aml_release(ctrl_lock)); 664 } 665 aml_append(cpus_dev, method); 666 667 /* build Processor object for each processor */ 668 for (i = 0; i < arch_ids->len; i++) { 669 Aml *dev; 670 Aml *uid = aml_int(i); 671 GArray *madt_buf = g_array_new(0, 1, 1); 672 int arch_id = arch_ids->cpus[i].arch_id; 673 674 if (opts.acpi_1_compatible && arch_id < 255) { 675 dev = aml_processor(i, 0, 0, CPU_NAME_FMT, i); 676 } else { 677 dev = aml_device(CPU_NAME_FMT, i); 678 aml_append(dev, aml_name_decl("_HID", aml_string("ACPI0007"))); 679 aml_append(dev, aml_name_decl("_UID", uid)); 680 } 681 682 method = aml_method("_STA", 0, AML_SERIALIZED); 683 aml_append(method, aml_return(aml_call1(CPU_STS_METHOD, uid))); 684 aml_append(dev, method); 685 686 /* build _MAT object */ 687 build_madt_cpu(i, arch_ids, madt_buf, true); /* set enabled flag */ 688 aml_append(dev, aml_name_decl("_MAT", 689 aml_buffer(madt_buf->len, (uint8_t *)madt_buf->data))); 690 g_array_free(madt_buf, true); 691 692 if (CPU(arch_ids->cpus[i].cpu) != first_cpu) { 693 method = aml_method("_EJ0", 1, AML_NOTSERIALIZED); 694 aml_append(method, aml_call1(CPU_EJECT_METHOD, uid)); 695 aml_append(dev, method); 696 } 697 698 method = aml_method("_OST", 3, AML_SERIALIZED); 699 aml_append(method, 700 aml_call4(CPU_OST_METHOD, uid, aml_arg(0), 701 aml_arg(1), aml_arg(2)) 702 ); 703 aml_append(dev, method); 704 705 /* Linux guests discard SRAT info for non-present CPUs 706 * as a result _PXM is required for all CPUs which might 707 * be hot-plugged. For simplicity, add it for all CPUs. 708 */ 709 if (arch_ids->cpus[i].props.has_node_id) { 710 aml_append(dev, aml_name_decl("_PXM", 711 aml_int(arch_ids->cpus[i].props.node_id))); 712 } 713 714 aml_append(cpus_dev, dev); 715 } 716 } 717 aml_append(sb_scope, cpus_dev); 718 aml_append(table, sb_scope); 719 720 method = aml_method(event_handler_method, 0, AML_NOTSERIALIZED); 721 aml_append(method, aml_call0("\\_SB.CPUS." CPU_SCAN_METHOD)); 722 aml_append(table, method); 723 724 g_free(cphp_res_path); 725 } 726