Merge remote-tracking branch 'remotes/bonzini-gitlab/tags/for-upstream' into staging
[qemu.git] / hw / acpi / cpu.c
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 info->has_device = true;
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 .minimum_version_id_old = 1,
301 .fields = (VMStateField[]) {
302 VMSTATE_BOOL(is_inserting, AcpiCpuStatus),
303 VMSTATE_BOOL(is_removing, AcpiCpuStatus),
304 VMSTATE_UINT32(ost_event, AcpiCpuStatus),
305 VMSTATE_UINT32(ost_status, AcpiCpuStatus),
306 VMSTATE_END_OF_LIST()
307 }
308 };
309
310 const VMStateDescription vmstate_cpu_hotplug = {
311 .name = "CPU hotplug state",
312 .version_id = 1,
313 .minimum_version_id = 1,
314 .minimum_version_id_old = 1,
315 .fields = (VMStateField[]) {
316 VMSTATE_UINT32(selector, CPUHotplugState),
317 VMSTATE_UINT8(command, CPUHotplugState),
318 VMSTATE_STRUCT_VARRAY_POINTER_UINT32(devs, CPUHotplugState, dev_count,
319 vmstate_cpuhp_sts, AcpiCpuStatus),
320 VMSTATE_END_OF_LIST()
321 }
322 };
323
324 #define CPU_NAME_FMT "C%.03X"
325 #define CPUHP_RES_DEVICE "PRES"
326 #define CPU_LOCK "CPLK"
327 #define CPU_STS_METHOD "CSTA"
328 #define CPU_SCAN_METHOD "CSCN"
329 #define CPU_NOTIFY_METHOD "CTFY"
330 #define CPU_EJECT_METHOD "CEJ0"
331 #define CPU_OST_METHOD "COST"
332 #define CPU_ADDED_LIST "CNEW"
333
334 #define CPU_ENABLED "CPEN"
335 #define CPU_SELECTOR "CSEL"
336 #define CPU_COMMAND "CCMD"
337 #define CPU_DATA "CDAT"
338 #define CPU_INSERT_EVENT "CINS"
339 #define CPU_REMOVE_EVENT "CRMV"
340 #define CPU_EJECT_EVENT "CEJ0"
341 #define CPU_FW_EJECT_EVENT "CEJF"
342
343 void build_cpus_aml(Aml *table, MachineState *machine, CPUHotplugFeatures opts,
344 hwaddr io_base,
345 const char *res_root,
346 const char *event_handler_method)
347 {
348 Aml *ifctx;
349 Aml *field;
350 Aml *method;
351 Aml *cpu_ctrl_dev;
352 Aml *cpus_dev;
353 Aml *zero = aml_int(0);
354 Aml *one = aml_int(1);
355 Aml *sb_scope = aml_scope("_SB");
356 MachineClass *mc = MACHINE_GET_CLASS(machine);
357 const CPUArchIdList *arch_ids = mc->possible_cpu_arch_ids(machine);
358 char *cphp_res_path = g_strdup_printf("%s." CPUHP_RES_DEVICE, res_root);
359 Object *obj = object_resolve_path_type("", TYPE_ACPI_DEVICE_IF, NULL);
360 AcpiDeviceIfClass *adevc = ACPI_DEVICE_IF_GET_CLASS(obj);
361 AcpiDeviceIf *adev = ACPI_DEVICE_IF(obj);
362
363 cpu_ctrl_dev = aml_device("%s", cphp_res_path);
364 {
365 Aml *crs;
366
367 aml_append(cpu_ctrl_dev,
368 aml_name_decl("_HID", aml_eisaid("PNP0A06")));
369 aml_append(cpu_ctrl_dev,
370 aml_name_decl("_UID", aml_string("CPU Hotplug resources")));
371 aml_append(cpu_ctrl_dev, aml_mutex(CPU_LOCK, 0));
372
373 crs = aml_resource_template();
374 aml_append(crs, aml_io(AML_DECODE16, io_base, io_base, 1,
375 ACPI_CPU_HOTPLUG_REG_LEN));
376 aml_append(cpu_ctrl_dev, aml_name_decl("_CRS", crs));
377
378 /* declare CPU hotplug MMIO region with related access fields */
379 aml_append(cpu_ctrl_dev,
380 aml_operation_region("PRST", AML_SYSTEM_IO, aml_int(io_base),
381 ACPI_CPU_HOTPLUG_REG_LEN));
382
383 field = aml_field("PRST", AML_BYTE_ACC, AML_NOLOCK,
384 AML_WRITE_AS_ZEROS);
385 aml_append(field, aml_reserved_field(ACPI_CPU_FLAGS_OFFSET_RW * 8));
386 /* 1 if enabled, read only */
387 aml_append(field, aml_named_field(CPU_ENABLED, 1));
388 /* (read) 1 if has a insert event. (write) 1 to clear event */
389 aml_append(field, aml_named_field(CPU_INSERT_EVENT, 1));
390 /* (read) 1 if has a remove event. (write) 1 to clear event */
391 aml_append(field, aml_named_field(CPU_REMOVE_EVENT, 1));
392 /* initiates device eject, write only */
393 aml_append(field, aml_named_field(CPU_EJECT_EVENT, 1));
394 /* tell firmware to do device eject, write only */
395 aml_append(field, aml_named_field(CPU_FW_EJECT_EVENT, 1));
396 aml_append(field, aml_reserved_field(3));
397 aml_append(field, aml_named_field(CPU_COMMAND, 8));
398 aml_append(cpu_ctrl_dev, field);
399
400 field = aml_field("PRST", AML_DWORD_ACC, AML_NOLOCK, AML_PRESERVE);
401 /* CPU selector, write only */
402 aml_append(field, aml_named_field(CPU_SELECTOR, 32));
403 /* flags + cmd + 2byte align */
404 aml_append(field, aml_reserved_field(4 * 8));
405 aml_append(field, aml_named_field(CPU_DATA, 32));
406 aml_append(cpu_ctrl_dev, field);
407
408 if (opts.has_legacy_cphp) {
409 method = aml_method("_INI", 0, AML_SERIALIZED);
410 /* switch off legacy CPU hotplug HW and use new one,
411 * on reboot system is in new mode and writing 0
412 * in CPU_SELECTOR selects BSP, which is NOP at
413 * the time _INI is called */
414 aml_append(method, aml_store(zero, aml_name(CPU_SELECTOR)));
415 aml_append(cpu_ctrl_dev, method);
416 }
417 }
418 aml_append(sb_scope, cpu_ctrl_dev);
419
420 cpus_dev = aml_device("\\_SB.CPUS");
421 {
422 int i;
423 Aml *ctrl_lock = aml_name("%s.%s", cphp_res_path, CPU_LOCK);
424 Aml *cpu_selector = aml_name("%s.%s", cphp_res_path, CPU_SELECTOR);
425 Aml *is_enabled = aml_name("%s.%s", cphp_res_path, CPU_ENABLED);
426 Aml *cpu_cmd = aml_name("%s.%s", cphp_res_path, CPU_COMMAND);
427 Aml *cpu_data = aml_name("%s.%s", cphp_res_path, CPU_DATA);
428 Aml *ins_evt = aml_name("%s.%s", cphp_res_path, CPU_INSERT_EVENT);
429 Aml *rm_evt = aml_name("%s.%s", cphp_res_path, CPU_REMOVE_EVENT);
430 Aml *ej_evt = aml_name("%s.%s", cphp_res_path, CPU_EJECT_EVENT);
431 Aml *fw_ej_evt = aml_name("%s.%s", cphp_res_path, CPU_FW_EJECT_EVENT);
432
433 aml_append(cpus_dev, aml_name_decl("_HID", aml_string("ACPI0010")));
434 aml_append(cpus_dev, aml_name_decl("_CID", aml_eisaid("PNP0A05")));
435
436 method = aml_method(CPU_NOTIFY_METHOD, 2, AML_NOTSERIALIZED);
437 for (i = 0; i < arch_ids->len; i++) {
438 Aml *cpu = aml_name(CPU_NAME_FMT, i);
439 Aml *uid = aml_arg(0);
440 Aml *event = aml_arg(1);
441
442 ifctx = aml_if(aml_equal(uid, aml_int(i)));
443 {
444 aml_append(ifctx, aml_notify(cpu, event));
445 }
446 aml_append(method, ifctx);
447 }
448 aml_append(cpus_dev, method);
449
450 method = aml_method(CPU_STS_METHOD, 1, AML_SERIALIZED);
451 {
452 Aml *idx = aml_arg(0);
453 Aml *sta = aml_local(0);
454
455 aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
456 aml_append(method, aml_store(idx, cpu_selector));
457 aml_append(method, aml_store(zero, sta));
458 ifctx = aml_if(aml_equal(is_enabled, one));
459 {
460 aml_append(ifctx, aml_store(aml_int(0xF), sta));
461 }
462 aml_append(method, ifctx);
463 aml_append(method, aml_release(ctrl_lock));
464 aml_append(method, aml_return(sta));
465 }
466 aml_append(cpus_dev, method);
467
468 method = aml_method(CPU_EJECT_METHOD, 1, AML_SERIALIZED);
469 {
470 Aml *idx = aml_arg(0);
471
472 aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
473 aml_append(method, aml_store(idx, cpu_selector));
474 if (opts.fw_unplugs_cpu) {
475 aml_append(method, aml_store(one, fw_ej_evt));
476 aml_append(method, aml_store(aml_int(OVMF_CPUHP_SMI_CMD),
477 aml_name("%s", opts.smi_path)));
478 } else {
479 aml_append(method, aml_store(one, ej_evt));
480 }
481 aml_append(method, aml_release(ctrl_lock));
482 }
483 aml_append(cpus_dev, method);
484
485 method = aml_method(CPU_SCAN_METHOD, 0, AML_SERIALIZED);
486 {
487 const uint8_t max_cpus_per_pass = 255;
488 Aml *else_ctx;
489 Aml *while_ctx, *while_ctx2;
490 Aml *has_event = aml_local(0);
491 Aml *dev_chk = aml_int(1);
492 Aml *eject_req = aml_int(3);
493 Aml *next_cpu_cmd = aml_int(CPHP_GET_NEXT_CPU_WITH_EVENT_CMD);
494 Aml *num_added_cpus = aml_local(1);
495 Aml *cpu_idx = aml_local(2);
496 Aml *uid = aml_local(3);
497 Aml *has_job = aml_local(4);
498 Aml *new_cpus = aml_name(CPU_ADDED_LIST);
499
500 aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
501
502 /*
503 * Windows versions newer than XP (including Windows 10/Windows
504 * Server 2019), do support* VarPackageOp but, it is cripled to hold
505 * the same elements number as old PackageOp.
506 * For compatibility with Windows XP (so it won't crash) use ACPI1.0
507 * PackageOp which can hold max 255 elements.
508 *
509 * use named package as old Windows don't support it in local var
510 */
511 aml_append(method, aml_name_decl(CPU_ADDED_LIST,
512 aml_package(max_cpus_per_pass)));
513
514 aml_append(method, aml_store(zero, uid));
515 aml_append(method, aml_store(one, has_job));
516 /*
517 * CPU_ADDED_LIST can hold limited number of elements, outer loop
518 * allows to process CPUs in batches which let us to handle more
519 * CPUs than CPU_ADDED_LIST can hold.
520 */
521 while_ctx2 = aml_while(aml_equal(has_job, one));
522 {
523 aml_append(while_ctx2, aml_store(zero, has_job));
524
525 aml_append(while_ctx2, aml_store(one, has_event));
526 aml_append(while_ctx2, aml_store(zero, num_added_cpus));
527
528 /*
529 * Scan CPUs, till there are CPUs with events or
530 * CPU_ADDED_LIST capacity is exhausted
531 */
532 while_ctx = aml_while(aml_land(aml_equal(has_event, one),
533 aml_lless(uid, aml_int(arch_ids->len))));
534 {
535 /*
536 * clear loop exit condition, ins_evt/rm_evt checks will
537 * set it to 1 while next_cpu_cmd returns a CPU with events
538 */
539 aml_append(while_ctx, aml_store(zero, has_event));
540
541 aml_append(while_ctx, aml_store(uid, cpu_selector));
542 aml_append(while_ctx, aml_store(next_cpu_cmd, cpu_cmd));
543
544 /*
545 * wrap around case, scan is complete, exit loop.
546 * It happens since events are not cleared in scan loop,
547 * so next_cpu_cmd continues to find already processed CPUs
548 */
549 ifctx = aml_if(aml_lless(cpu_data, uid));
550 {
551 aml_append(ifctx, aml_break());
552 }
553 aml_append(while_ctx, ifctx);
554
555 /*
556 * if CPU_ADDED_LIST is full, exit inner loop and process
557 * collected CPUs
558 */
559 ifctx = aml_if(
560 aml_equal(num_added_cpus, aml_int(max_cpus_per_pass)));
561 {
562 aml_append(ifctx, aml_store(one, has_job));
563 aml_append(ifctx, aml_break());
564 }
565 aml_append(while_ctx, ifctx);
566
567 aml_append(while_ctx, aml_store(cpu_data, uid));
568 ifctx = aml_if(aml_equal(ins_evt, one));
569 {
570 /* cache added CPUs to Notify/Wakeup later */
571 aml_append(ifctx, aml_store(uid,
572 aml_index(new_cpus, num_added_cpus)));
573 aml_append(ifctx, aml_increment(num_added_cpus));
574 aml_append(ifctx, aml_store(one, has_event));
575 }
576 aml_append(while_ctx, ifctx);
577 else_ctx = aml_else();
578 ifctx = aml_if(aml_equal(rm_evt, one));
579 {
580 aml_append(ifctx,
581 aml_call2(CPU_NOTIFY_METHOD, uid, eject_req));
582 aml_append(ifctx, aml_store(one, rm_evt));
583 aml_append(ifctx, aml_store(one, has_event));
584 }
585 aml_append(else_ctx, ifctx);
586 aml_append(while_ctx, else_ctx);
587 aml_append(while_ctx, aml_increment(uid));
588 }
589 aml_append(while_ctx2, while_ctx);
590
591 /*
592 * in case FW negotiated ICH9_LPC_SMI_F_CPU_HOTPLUG_BIT,
593 * make upcall to FW, so it can pull in new CPUs before
594 * OS is notified and wakes them up
595 */
596 if (opts.smi_path) {
597 ifctx = aml_if(aml_lgreater(num_added_cpus, zero));
598 {
599 aml_append(ifctx, aml_store(aml_int(OVMF_CPUHP_SMI_CMD),
600 aml_name("%s", opts.smi_path)));
601 }
602 aml_append(while_ctx2, ifctx);
603 }
604
605 /* Notify OSPM about new CPUs and clear insert events */
606 aml_append(while_ctx2, aml_store(zero, cpu_idx));
607 while_ctx = aml_while(aml_lless(cpu_idx, num_added_cpus));
608 {
609 aml_append(while_ctx,
610 aml_store(aml_derefof(aml_index(new_cpus, cpu_idx)),
611 uid));
612 aml_append(while_ctx,
613 aml_call2(CPU_NOTIFY_METHOD, uid, dev_chk));
614 aml_append(while_ctx, aml_store(uid, aml_debug()));
615 aml_append(while_ctx, aml_store(uid, cpu_selector));
616 aml_append(while_ctx, aml_store(one, ins_evt));
617 aml_append(while_ctx, aml_increment(cpu_idx));
618 }
619 aml_append(while_ctx2, while_ctx);
620 /*
621 * If another batch is needed, then it will resume scanning
622 * exactly at -- and not after -- the last CPU that's currently
623 * in CPU_ADDED_LIST. In other words, the last CPU in
624 * CPU_ADDED_LIST is going to be re-checked. That's OK: we've
625 * just cleared the insert event for *all* CPUs in
626 * CPU_ADDED_LIST, including the last one. So the scan will
627 * simply seek past it.
628 */
629 }
630 aml_append(method, while_ctx2);
631 aml_append(method, aml_release(ctrl_lock));
632 }
633 aml_append(cpus_dev, method);
634
635 method = aml_method(CPU_OST_METHOD, 4, AML_SERIALIZED);
636 {
637 Aml *uid = aml_arg(0);
638 Aml *ev_cmd = aml_int(CPHP_OST_EVENT_CMD);
639 Aml *st_cmd = aml_int(CPHP_OST_STATUS_CMD);
640
641 aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
642 aml_append(method, aml_store(uid, cpu_selector));
643 aml_append(method, aml_store(ev_cmd, cpu_cmd));
644 aml_append(method, aml_store(aml_arg(1), cpu_data));
645 aml_append(method, aml_store(st_cmd, cpu_cmd));
646 aml_append(method, aml_store(aml_arg(2), cpu_data));
647 aml_append(method, aml_release(ctrl_lock));
648 }
649 aml_append(cpus_dev, method);
650
651 /* build Processor object for each processor */
652 for (i = 0; i < arch_ids->len; i++) {
653 Aml *dev;
654 Aml *uid = aml_int(i);
655 GArray *madt_buf = g_array_new(0, 1, 1);
656 int arch_id = arch_ids->cpus[i].arch_id;
657
658 if (opts.acpi_1_compatible && arch_id < 255) {
659 dev = aml_processor(i, 0, 0, CPU_NAME_FMT, i);
660 } else {
661 dev = aml_device(CPU_NAME_FMT, i);
662 aml_append(dev, aml_name_decl("_HID", aml_string("ACPI0007")));
663 aml_append(dev, aml_name_decl("_UID", uid));
664 }
665
666 method = aml_method("_STA", 0, AML_SERIALIZED);
667 aml_append(method, aml_return(aml_call1(CPU_STS_METHOD, uid)));
668 aml_append(dev, method);
669
670 /* build _MAT object */
671 assert(adevc && adevc->madt_cpu);
672 adevc->madt_cpu(adev, i, arch_ids, madt_buf,
673 true); /* set enabled flag */
674 aml_append(dev, aml_name_decl("_MAT",
675 aml_buffer(madt_buf->len, (uint8_t *)madt_buf->data)));
676 g_array_free(madt_buf, true);
677
678 if (CPU(arch_ids->cpus[i].cpu) != first_cpu) {
679 method = aml_method("_EJ0", 1, AML_NOTSERIALIZED);
680 aml_append(method, aml_call1(CPU_EJECT_METHOD, uid));
681 aml_append(dev, method);
682 }
683
684 method = aml_method("_OST", 3, AML_SERIALIZED);
685 aml_append(method,
686 aml_call4(CPU_OST_METHOD, uid, aml_arg(0),
687 aml_arg(1), aml_arg(2))
688 );
689 aml_append(dev, method);
690
691 /* Linux guests discard SRAT info for non-present CPUs
692 * as a result _PXM is required for all CPUs which might
693 * be hot-plugged. For simplicity, add it for all CPUs.
694 */
695 if (arch_ids->cpus[i].props.has_node_id) {
696 aml_append(dev, aml_name_decl("_PXM",
697 aml_int(arch_ids->cpus[i].props.node_id)));
698 }
699
700 aml_append(cpus_dev, dev);
701 }
702 }
703 aml_append(sb_scope, cpus_dev);
704 aml_append(table, sb_scope);
705
706 method = aml_method(event_handler_method, 0, AML_NOTSERIALIZED);
707 aml_append(method, aml_call0("\\_SB.CPUS." CPU_SCAN_METHOD));
708 aml_append(table, method);
709
710 g_free(cphp_res_path);
711 }