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