1 #include "qemu/osdep.h" 2 #include "migration/vmstate.h" 3 #include "hw/acpi/cpu.h" 4 #include "qapi/error.h" 5 #include "qapi/qapi-events-acpi.h" 6 #include "trace.h" 7 #include "sysemu/numa.h" 8 9 #define ACPI_CPU_HOTPLUG_REG_LEN 12 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 AcpiCpuStatus *get_cpu_status(CPUHotplugState *cpu_st, DeviceState *dev) 237 { 238 CPUClass *k = CPU_GET_CLASS(dev); 239 uint64_t cpu_arch_id = k->get_arch_id(CPU(dev)); 240 int i; 241 242 for (i = 0; i < cpu_st->dev_count; i++) { 243 if (cpu_arch_id == cpu_st->devs[i].arch_id) { 244 return &cpu_st->devs[i]; 245 } 246 } 247 return NULL; 248 } 249 250 void acpi_cpu_plug_cb(HotplugHandler *hotplug_dev, 251 CPUHotplugState *cpu_st, DeviceState *dev, Error **errp) 252 { 253 AcpiCpuStatus *cdev; 254 255 cdev = get_cpu_status(cpu_st, dev); 256 if (!cdev) { 257 return; 258 } 259 260 cdev->cpu = CPU(dev); 261 if (dev->hotplugged) { 262 cdev->is_inserting = true; 263 acpi_send_event(DEVICE(hotplug_dev), ACPI_CPU_HOTPLUG_STATUS); 264 } 265 } 266 267 void acpi_cpu_unplug_request_cb(HotplugHandler *hotplug_dev, 268 CPUHotplugState *cpu_st, 269 DeviceState *dev, Error **errp) 270 { 271 AcpiCpuStatus *cdev; 272 273 cdev = get_cpu_status(cpu_st, dev); 274 if (!cdev) { 275 return; 276 } 277 278 cdev->is_removing = true; 279 acpi_send_event(DEVICE(hotplug_dev), ACPI_CPU_HOTPLUG_STATUS); 280 } 281 282 void acpi_cpu_unplug_cb(CPUHotplugState *cpu_st, 283 DeviceState *dev, Error **errp) 284 { 285 AcpiCpuStatus *cdev; 286 287 cdev = get_cpu_status(cpu_st, dev); 288 if (!cdev) { 289 return; 290 } 291 292 cdev->cpu = NULL; 293 } 294 295 static const VMStateDescription vmstate_cpuhp_sts = { 296 .name = "CPU hotplug device state", 297 .version_id = 1, 298 .minimum_version_id = 1, 299 .fields = (VMStateField[]) { 300 VMSTATE_BOOL(is_inserting, AcpiCpuStatus), 301 VMSTATE_BOOL(is_removing, AcpiCpuStatus), 302 VMSTATE_UINT32(ost_event, AcpiCpuStatus), 303 VMSTATE_UINT32(ost_status, AcpiCpuStatus), 304 VMSTATE_END_OF_LIST() 305 } 306 }; 307 308 const VMStateDescription vmstate_cpu_hotplug = { 309 .name = "CPU hotplug state", 310 .version_id = 1, 311 .minimum_version_id = 1, 312 .fields = (VMStateField[]) { 313 VMSTATE_UINT32(selector, CPUHotplugState), 314 VMSTATE_UINT8(command, CPUHotplugState), 315 VMSTATE_STRUCT_VARRAY_POINTER_UINT32(devs, CPUHotplugState, dev_count, 316 vmstate_cpuhp_sts, AcpiCpuStatus), 317 VMSTATE_END_OF_LIST() 318 } 319 }; 320 321 #define CPU_NAME_FMT "C%.03X" 322 #define CPUHP_RES_DEVICE "PRES" 323 #define CPU_LOCK "CPLK" 324 #define CPU_STS_METHOD "CSTA" 325 #define CPU_SCAN_METHOD "CSCN" 326 #define CPU_NOTIFY_METHOD "CTFY" 327 #define CPU_EJECT_METHOD "CEJ0" 328 #define CPU_OST_METHOD "COST" 329 #define CPU_ADDED_LIST "CNEW" 330 331 #define CPU_ENABLED "CPEN" 332 #define CPU_SELECTOR "CSEL" 333 #define CPU_COMMAND "CCMD" 334 #define CPU_DATA "CDAT" 335 #define CPU_INSERT_EVENT "CINS" 336 #define CPU_REMOVE_EVENT "CRMV" 337 #define CPU_EJECT_EVENT "CEJ0" 338 #define CPU_FW_EJECT_EVENT "CEJF" 339 340 void build_cpus_aml(Aml *table, MachineState *machine, CPUHotplugFeatures opts, 341 hwaddr io_base, 342 const char *res_root, 343 const char *event_handler_method) 344 { 345 Aml *ifctx; 346 Aml *field; 347 Aml *method; 348 Aml *cpu_ctrl_dev; 349 Aml *cpus_dev; 350 Aml *zero = aml_int(0); 351 Aml *one = aml_int(1); 352 Aml *sb_scope = aml_scope("_SB"); 353 MachineClass *mc = MACHINE_GET_CLASS(machine); 354 const CPUArchIdList *arch_ids = mc->possible_cpu_arch_ids(machine); 355 char *cphp_res_path = g_strdup_printf("%s." CPUHP_RES_DEVICE, res_root); 356 Object *obj = object_resolve_path_type("", TYPE_ACPI_DEVICE_IF, NULL); 357 AcpiDeviceIfClass *adevc = ACPI_DEVICE_IF_GET_CLASS(obj); 358 359 cpu_ctrl_dev = aml_device("%s", cphp_res_path); 360 { 361 Aml *crs; 362 363 aml_append(cpu_ctrl_dev, 364 aml_name_decl("_HID", aml_eisaid("PNP0A06"))); 365 aml_append(cpu_ctrl_dev, 366 aml_name_decl("_UID", aml_string("CPU Hotplug resources"))); 367 aml_append(cpu_ctrl_dev, aml_mutex(CPU_LOCK, 0)); 368 369 crs = aml_resource_template(); 370 aml_append(crs, aml_io(AML_DECODE16, io_base, io_base, 1, 371 ACPI_CPU_HOTPLUG_REG_LEN)); 372 aml_append(cpu_ctrl_dev, aml_name_decl("_CRS", crs)); 373 374 /* declare CPU hotplug MMIO region with related access fields */ 375 aml_append(cpu_ctrl_dev, 376 aml_operation_region("PRST", AML_SYSTEM_IO, aml_int(io_base), 377 ACPI_CPU_HOTPLUG_REG_LEN)); 378 379 field = aml_field("PRST", AML_BYTE_ACC, AML_NOLOCK, 380 AML_WRITE_AS_ZEROS); 381 aml_append(field, aml_reserved_field(ACPI_CPU_FLAGS_OFFSET_RW * 8)); 382 /* 1 if enabled, read only */ 383 aml_append(field, aml_named_field(CPU_ENABLED, 1)); 384 /* (read) 1 if has a insert event. (write) 1 to clear event */ 385 aml_append(field, aml_named_field(CPU_INSERT_EVENT, 1)); 386 /* (read) 1 if has a remove event. (write) 1 to clear event */ 387 aml_append(field, aml_named_field(CPU_REMOVE_EVENT, 1)); 388 /* initiates device eject, write only */ 389 aml_append(field, aml_named_field(CPU_EJECT_EVENT, 1)); 390 /* tell firmware to do device eject, write only */ 391 aml_append(field, aml_named_field(CPU_FW_EJECT_EVENT, 1)); 392 aml_append(field, aml_reserved_field(3)); 393 aml_append(field, aml_named_field(CPU_COMMAND, 8)); 394 aml_append(cpu_ctrl_dev, field); 395 396 field = aml_field("PRST", AML_DWORD_ACC, AML_NOLOCK, AML_PRESERVE); 397 /* CPU selector, write only */ 398 aml_append(field, aml_named_field(CPU_SELECTOR, 32)); 399 /* flags + cmd + 2byte align */ 400 aml_append(field, aml_reserved_field(4 * 8)); 401 aml_append(field, aml_named_field(CPU_DATA, 32)); 402 aml_append(cpu_ctrl_dev, field); 403 404 if (opts.has_legacy_cphp) { 405 method = aml_method("_INI", 0, AML_SERIALIZED); 406 /* switch off legacy CPU hotplug HW and use new one, 407 * on reboot system is in new mode and writing 0 408 * in CPU_SELECTOR selects BSP, which is NOP at 409 * the time _INI is called */ 410 aml_append(method, aml_store(zero, aml_name(CPU_SELECTOR))); 411 aml_append(cpu_ctrl_dev, method); 412 } 413 } 414 aml_append(sb_scope, cpu_ctrl_dev); 415 416 cpus_dev = aml_device("\\_SB.CPUS"); 417 { 418 int i; 419 Aml *ctrl_lock = aml_name("%s.%s", cphp_res_path, CPU_LOCK); 420 Aml *cpu_selector = aml_name("%s.%s", cphp_res_path, CPU_SELECTOR); 421 Aml *is_enabled = aml_name("%s.%s", cphp_res_path, CPU_ENABLED); 422 Aml *cpu_cmd = aml_name("%s.%s", cphp_res_path, CPU_COMMAND); 423 Aml *cpu_data = aml_name("%s.%s", cphp_res_path, CPU_DATA); 424 Aml *ins_evt = aml_name("%s.%s", cphp_res_path, CPU_INSERT_EVENT); 425 Aml *rm_evt = aml_name("%s.%s", cphp_res_path, CPU_REMOVE_EVENT); 426 Aml *ej_evt = aml_name("%s.%s", cphp_res_path, CPU_EJECT_EVENT); 427 Aml *fw_ej_evt = aml_name("%s.%s", cphp_res_path, CPU_FW_EJECT_EVENT); 428 429 aml_append(cpus_dev, aml_name_decl("_HID", aml_string("ACPI0010"))); 430 aml_append(cpus_dev, aml_name_decl("_CID", aml_eisaid("PNP0A05"))); 431 432 method = aml_method(CPU_NOTIFY_METHOD, 2, AML_NOTSERIALIZED); 433 for (i = 0; i < arch_ids->len; i++) { 434 Aml *cpu = aml_name(CPU_NAME_FMT, i); 435 Aml *uid = aml_arg(0); 436 Aml *event = aml_arg(1); 437 438 ifctx = aml_if(aml_equal(uid, aml_int(i))); 439 { 440 aml_append(ifctx, aml_notify(cpu, event)); 441 } 442 aml_append(method, ifctx); 443 } 444 aml_append(cpus_dev, method); 445 446 method = aml_method(CPU_STS_METHOD, 1, AML_SERIALIZED); 447 { 448 Aml *idx = aml_arg(0); 449 Aml *sta = aml_local(0); 450 451 aml_append(method, aml_acquire(ctrl_lock, 0xFFFF)); 452 aml_append(method, aml_store(idx, cpu_selector)); 453 aml_append(method, aml_store(zero, sta)); 454 ifctx = aml_if(aml_equal(is_enabled, one)); 455 { 456 aml_append(ifctx, aml_store(aml_int(0xF), sta)); 457 } 458 aml_append(method, ifctx); 459 aml_append(method, aml_release(ctrl_lock)); 460 aml_append(method, aml_return(sta)); 461 } 462 aml_append(cpus_dev, method); 463 464 method = aml_method(CPU_EJECT_METHOD, 1, AML_SERIALIZED); 465 { 466 Aml *idx = aml_arg(0); 467 468 aml_append(method, aml_acquire(ctrl_lock, 0xFFFF)); 469 aml_append(method, aml_store(idx, cpu_selector)); 470 if (opts.fw_unplugs_cpu) { 471 aml_append(method, aml_store(one, fw_ej_evt)); 472 aml_append(method, aml_store(aml_int(OVMF_CPUHP_SMI_CMD), 473 aml_name("%s", opts.smi_path))); 474 } else { 475 aml_append(method, aml_store(one, ej_evt)); 476 } 477 aml_append(method, aml_release(ctrl_lock)); 478 } 479 aml_append(cpus_dev, method); 480 481 method = aml_method(CPU_SCAN_METHOD, 0, AML_SERIALIZED); 482 { 483 const uint8_t max_cpus_per_pass = 255; 484 Aml *else_ctx; 485 Aml *while_ctx, *while_ctx2; 486 Aml *has_event = aml_local(0); 487 Aml *dev_chk = aml_int(1); 488 Aml *eject_req = aml_int(3); 489 Aml *next_cpu_cmd = aml_int(CPHP_GET_NEXT_CPU_WITH_EVENT_CMD); 490 Aml *num_added_cpus = aml_local(1); 491 Aml *cpu_idx = aml_local(2); 492 Aml *uid = aml_local(3); 493 Aml *has_job = aml_local(4); 494 Aml *new_cpus = aml_name(CPU_ADDED_LIST); 495 496 aml_append(method, aml_acquire(ctrl_lock, 0xFFFF)); 497 498 /* 499 * Windows versions newer than XP (including Windows 10/Windows 500 * Server 2019), do support* VarPackageOp but, it is cripled to hold 501 * the same elements number as old PackageOp. 502 * For compatibility with Windows XP (so it won't crash) use ACPI1.0 503 * PackageOp which can hold max 255 elements. 504 * 505 * use named package as old Windows don't support it in local var 506 */ 507 aml_append(method, aml_name_decl(CPU_ADDED_LIST, 508 aml_package(max_cpus_per_pass))); 509 510 aml_append(method, aml_store(zero, uid)); 511 aml_append(method, aml_store(one, has_job)); 512 /* 513 * CPU_ADDED_LIST can hold limited number of elements, outer loop 514 * allows to process CPUs in batches which let us to handle more 515 * CPUs than CPU_ADDED_LIST can hold. 516 */ 517 while_ctx2 = aml_while(aml_equal(has_job, one)); 518 { 519 aml_append(while_ctx2, aml_store(zero, has_job)); 520 521 aml_append(while_ctx2, aml_store(one, has_event)); 522 aml_append(while_ctx2, aml_store(zero, num_added_cpus)); 523 524 /* 525 * Scan CPUs, till there are CPUs with events or 526 * CPU_ADDED_LIST capacity is exhausted 527 */ 528 while_ctx = aml_while(aml_land(aml_equal(has_event, one), 529 aml_lless(uid, aml_int(arch_ids->len)))); 530 { 531 /* 532 * clear loop exit condition, ins_evt/rm_evt checks will 533 * set it to 1 while next_cpu_cmd returns a CPU with events 534 */ 535 aml_append(while_ctx, aml_store(zero, has_event)); 536 537 aml_append(while_ctx, aml_store(uid, cpu_selector)); 538 aml_append(while_ctx, aml_store(next_cpu_cmd, cpu_cmd)); 539 540 /* 541 * wrap around case, scan is complete, exit loop. 542 * It happens since events are not cleared in scan loop, 543 * so next_cpu_cmd continues to find already processed CPUs 544 */ 545 ifctx = aml_if(aml_lless(cpu_data, uid)); 546 { 547 aml_append(ifctx, aml_break()); 548 } 549 aml_append(while_ctx, ifctx); 550 551 /* 552 * if CPU_ADDED_LIST is full, exit inner loop and process 553 * collected CPUs 554 */ 555 ifctx = aml_if( 556 aml_equal(num_added_cpus, aml_int(max_cpus_per_pass))); 557 { 558 aml_append(ifctx, aml_store(one, has_job)); 559 aml_append(ifctx, aml_break()); 560 } 561 aml_append(while_ctx, ifctx); 562 563 aml_append(while_ctx, aml_store(cpu_data, uid)); 564 ifctx = aml_if(aml_equal(ins_evt, one)); 565 { 566 /* cache added CPUs to Notify/Wakeup later */ 567 aml_append(ifctx, aml_store(uid, 568 aml_index(new_cpus, num_added_cpus))); 569 aml_append(ifctx, aml_increment(num_added_cpus)); 570 aml_append(ifctx, aml_store(one, has_event)); 571 } 572 aml_append(while_ctx, ifctx); 573 else_ctx = aml_else(); 574 ifctx = aml_if(aml_equal(rm_evt, one)); 575 { 576 aml_append(ifctx, 577 aml_call2(CPU_NOTIFY_METHOD, uid, eject_req)); 578 aml_append(ifctx, aml_store(one, rm_evt)); 579 aml_append(ifctx, aml_store(one, has_event)); 580 } 581 aml_append(else_ctx, ifctx); 582 aml_append(while_ctx, else_ctx); 583 aml_append(while_ctx, aml_increment(uid)); 584 } 585 aml_append(while_ctx2, while_ctx); 586 587 /* 588 * in case FW negotiated ICH9_LPC_SMI_F_CPU_HOTPLUG_BIT, 589 * make upcall to FW, so it can pull in new CPUs before 590 * OS is notified and wakes them up 591 */ 592 if (opts.smi_path) { 593 ifctx = aml_if(aml_lgreater(num_added_cpus, zero)); 594 { 595 aml_append(ifctx, aml_store(aml_int(OVMF_CPUHP_SMI_CMD), 596 aml_name("%s", opts.smi_path))); 597 } 598 aml_append(while_ctx2, ifctx); 599 } 600 601 /* Notify OSPM about new CPUs and clear insert events */ 602 aml_append(while_ctx2, aml_store(zero, cpu_idx)); 603 while_ctx = aml_while(aml_lless(cpu_idx, num_added_cpus)); 604 { 605 aml_append(while_ctx, 606 aml_store(aml_derefof(aml_index(new_cpus, cpu_idx)), 607 uid)); 608 aml_append(while_ctx, 609 aml_call2(CPU_NOTIFY_METHOD, uid, dev_chk)); 610 aml_append(while_ctx, aml_store(uid, aml_debug())); 611 aml_append(while_ctx, aml_store(uid, cpu_selector)); 612 aml_append(while_ctx, aml_store(one, ins_evt)); 613 aml_append(while_ctx, aml_increment(cpu_idx)); 614 } 615 aml_append(while_ctx2, while_ctx); 616 /* 617 * If another batch is needed, then it will resume scanning 618 * exactly at -- and not after -- the last CPU that's currently 619 * in CPU_ADDED_LIST. In other words, the last CPU in 620 * CPU_ADDED_LIST is going to be re-checked. That's OK: we've 621 * just cleared the insert event for *all* CPUs in 622 * CPU_ADDED_LIST, including the last one. So the scan will 623 * simply seek past it. 624 */ 625 } 626 aml_append(method, while_ctx2); 627 aml_append(method, aml_release(ctrl_lock)); 628 } 629 aml_append(cpus_dev, method); 630 631 method = aml_method(CPU_OST_METHOD, 4, AML_SERIALIZED); 632 { 633 Aml *uid = aml_arg(0); 634 Aml *ev_cmd = aml_int(CPHP_OST_EVENT_CMD); 635 Aml *st_cmd = aml_int(CPHP_OST_STATUS_CMD); 636 637 aml_append(method, aml_acquire(ctrl_lock, 0xFFFF)); 638 aml_append(method, aml_store(uid, cpu_selector)); 639 aml_append(method, aml_store(ev_cmd, cpu_cmd)); 640 aml_append(method, aml_store(aml_arg(1), cpu_data)); 641 aml_append(method, aml_store(st_cmd, cpu_cmd)); 642 aml_append(method, aml_store(aml_arg(2), cpu_data)); 643 aml_append(method, aml_release(ctrl_lock)); 644 } 645 aml_append(cpus_dev, method); 646 647 /* build Processor object for each processor */ 648 for (i = 0; i < arch_ids->len; i++) { 649 Aml *dev; 650 Aml *uid = aml_int(i); 651 GArray *madt_buf = g_array_new(0, 1, 1); 652 int arch_id = arch_ids->cpus[i].arch_id; 653 654 if (opts.acpi_1_compatible && arch_id < 255) { 655 dev = aml_processor(i, 0, 0, CPU_NAME_FMT, i); 656 } else { 657 dev = aml_device(CPU_NAME_FMT, i); 658 aml_append(dev, aml_name_decl("_HID", aml_string("ACPI0007"))); 659 aml_append(dev, aml_name_decl("_UID", uid)); 660 } 661 662 method = aml_method("_STA", 0, AML_SERIALIZED); 663 aml_append(method, aml_return(aml_call1(CPU_STS_METHOD, uid))); 664 aml_append(dev, method); 665 666 /* build _MAT object */ 667 assert(adevc && adevc->madt_cpu); 668 adevc->madt_cpu(i, arch_ids, madt_buf, 669 true); /* set enabled flag */ 670 aml_append(dev, aml_name_decl("_MAT", 671 aml_buffer(madt_buf->len, (uint8_t *)madt_buf->data))); 672 g_array_free(madt_buf, true); 673 674 if (CPU(arch_ids->cpus[i].cpu) != first_cpu) { 675 method = aml_method("_EJ0", 1, AML_NOTSERIALIZED); 676 aml_append(method, aml_call1(CPU_EJECT_METHOD, uid)); 677 aml_append(dev, method); 678 } 679 680 method = aml_method("_OST", 3, AML_SERIALIZED); 681 aml_append(method, 682 aml_call4(CPU_OST_METHOD, uid, aml_arg(0), 683 aml_arg(1), aml_arg(2)) 684 ); 685 aml_append(dev, method); 686 687 /* Linux guests discard SRAT info for non-present CPUs 688 * as a result _PXM is required for all CPUs which might 689 * be hot-plugged. For simplicity, add it for all CPUs. 690 */ 691 if (arch_ids->cpus[i].props.has_node_id) { 692 aml_append(dev, aml_name_decl("_PXM", 693 aml_int(arch_ids->cpus[i].props.node_id))); 694 } 695 696 aml_append(cpus_dev, dev); 697 } 698 } 699 aml_append(sb_scope, cpus_dev); 700 aml_append(table, sb_scope); 701 702 method = aml_method(event_handler_method, 0, AML_NOTSERIALIZED); 703 aml_append(method, aml_call0("\\_SB.CPUS." CPU_SCAN_METHOD)); 704 aml_append(table, method); 705 706 g_free(cphp_res_path); 707 } 708