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