1#include "qemu/osdep.h"
2#include "hw/boards.h"
3#include "hw/acpi/cpu.h"
4#include "qapi/error.h"
5#include "qapi-event.h"
6#include "trace.h"
7
8#define ACPI_CPU_HOTPLUG_REG_LEN 12
9#define ACPI_CPU_SELECTOR_OFFSET_WR 0
10#define ACPI_CPU_FLAGS_OFFSET_RW 4
11#define ACPI_CPU_CMD_OFFSET_WR 5
12#define ACPI_CPU_CMD_DATA_OFFSET_RW 8
13
14enum {
15 CPHP_GET_NEXT_CPU_WITH_EVENT_CMD = 0,
16 CPHP_OST_EVENT_CMD = 1,
17 CPHP_OST_STATUS_CMD = 2,
18 CPHP_CMD_MAX
19};
20
21static ACPIOSTInfo *acpi_cpu_device_status(int idx, AcpiCpuStatus *cdev)
22{
23 ACPIOSTInfo *info = g_new0(ACPIOSTInfo, 1);
24
25 info->slot_type = ACPI_SLOT_TYPE_CPU;
26 info->slot = g_strdup_printf("%d", idx);
27 info->source = cdev->ost_event;
28 info->status = cdev->ost_status;
29 if (cdev->cpu) {
30 DeviceState *dev = DEVICE(cdev->cpu);
31 if (dev->id) {
32 info->device = g_strdup(dev->id);
33 info->has_device = true;
34 }
35 }
36 return info;
37}
38
39void acpi_cpu_ospm_status(CPUHotplugState *cpu_st, ACPIOSTInfoList ***list)
40{
41 int i;
42
43 for (i = 0; i < cpu_st->dev_count; i++) {
44 ACPIOSTInfoList *elem = g_new0(ACPIOSTInfoList, 1);
45 elem->value = acpi_cpu_device_status(i, &cpu_st->devs[i]);
46 elem->next = NULL;
47 **list = elem;
48 *list = &elem->next;
49 }
50}
51
52static uint64_t cpu_hotplug_rd(void *opaque, hwaddr addr, unsigned size)
53{
54 uint64_t val = 0;
55 CPUHotplugState *cpu_st = opaque;
56 AcpiCpuStatus *cdev;
57
58 if (cpu_st->selector >= cpu_st->dev_count) {
59 return val;
60 }
61
62 cdev = &cpu_st->devs[cpu_st->selector];
63 switch (addr) {
64 case ACPI_CPU_FLAGS_OFFSET_RW:
65 val |= cdev->cpu ? 1 : 0;
66 val |= cdev->is_inserting ? 2 : 0;
67 val |= cdev->is_removing ? 4 : 0;
68 trace_cpuhp_acpi_read_flags(cpu_st->selector, val);
69 break;
70 case ACPI_CPU_CMD_DATA_OFFSET_RW:
71 switch (cpu_st->command) {
72 case CPHP_GET_NEXT_CPU_WITH_EVENT_CMD:
73 val = cpu_st->selector;
74 break;
75 default:
76 break;
77 }
78 trace_cpuhp_acpi_read_cmd_data(cpu_st->selector, val);
79 break;
80 default:
81 break;
82 }
83 return val;
84}
85
86static void cpu_hotplug_wr(void *opaque, hwaddr addr, uint64_t data,
87 unsigned int size)
88{
89 CPUHotplugState *cpu_st = opaque;
90 AcpiCpuStatus *cdev;
91 ACPIOSTInfo *info;
92
93 assert(cpu_st->dev_count);
94
95 if (addr) {
96 if (cpu_st->selector >= cpu_st->dev_count) {
97 trace_cpuhp_acpi_invalid_idx_selected(cpu_st->selector);
98 return;
99 }
100 }
101
102 switch (addr) {
103 case ACPI_CPU_SELECTOR_OFFSET_WR:
104 cpu_st->selector = data;
105 trace_cpuhp_acpi_write_idx(cpu_st->selector);
106 break;
107 case ACPI_CPU_FLAGS_OFFSET_RW:
108 cdev = &cpu_st->devs[cpu_st->selector];
109 if (data & 2) {
110 cdev->is_inserting = false;
111 trace_cpuhp_acpi_clear_inserting_evt(cpu_st->selector);
112 } else if (data & 4) {
113 cdev->is_removing = false;
114 trace_cpuhp_acpi_clear_remove_evt(cpu_st->selector);
115 } else if (data & 8) {
116 DeviceState *dev = NULL;
117 HotplugHandler *hotplug_ctrl = NULL;
118
119 if (!cdev->cpu) {
120 trace_cpuhp_acpi_ejecting_invalid_cpu(cpu_st->selector);
121 break;
122 }
123
124 trace_cpuhp_acpi_ejecting_cpu(cpu_st->selector);
125 dev = DEVICE(cdev->cpu);
126 hotplug_ctrl = qdev_get_hotplug_handler(dev);
127 hotplug_handler_unplug(hotplug_ctrl, dev, NULL);
128 }
129 break;
130 case ACPI_CPU_CMD_OFFSET_WR:
131 trace_cpuhp_acpi_write_cmd(cpu_st->selector, data);
132 if (data < CPHP_CMD_MAX) {
133 cpu_st->command = data;
134 if (cpu_st->command == CPHP_GET_NEXT_CPU_WITH_EVENT_CMD) {
135 uint32_t iter = cpu_st->selector;
136
137 do {
138 cdev = &cpu_st->devs[iter];
139 if (cdev->is_inserting || cdev->is_removing) {
140 cpu_st->selector = iter;
141 trace_cpuhp_acpi_cpu_has_events(cpu_st->selector,
142 cdev->is_inserting, cdev->is_removing);
143 break;
144 }
145 iter = iter + 1 < cpu_st->dev_count ? iter + 1 : 0;
146 } while (iter != cpu_st->selector);
147 }
148 }
149 break;
150 case ACPI_CPU_CMD_DATA_OFFSET_RW:
151 switch (cpu_st->command) {
152 case CPHP_OST_EVENT_CMD: {
153 cdev = &cpu_st->devs[cpu_st->selector];
154 cdev->ost_event = data;
155 trace_cpuhp_acpi_write_ost_ev(cpu_st->selector, cdev->ost_event);
156 break;
157 }
158 case CPHP_OST_STATUS_CMD: {
159 cdev = &cpu_st->devs[cpu_st->selector];
160 cdev->ost_status = data;
161 info = acpi_cpu_device_status(cpu_st->selector, cdev);
162 qapi_event_send_acpi_device_ost(info, &error_abort);
163 qapi_free_ACPIOSTInfo(info);
164 trace_cpuhp_acpi_write_ost_status(cpu_st->selector,
165 cdev->ost_status);
166 break;
167 }
168 default:
169 break;
170 }
171 break;
172 default:
173 break;
174 }
175}
176
177static const MemoryRegionOps cpu_hotplug_ops = {
178 .read = cpu_hotplug_rd,
179 .write = cpu_hotplug_wr,
180 .endianness = DEVICE_LITTLE_ENDIAN,
181 .valid = {
182 .min_access_size = 1,
183 .max_access_size = 4,
184 },
185};
186
187void cpu_hotplug_hw_init(MemoryRegion *as, Object *owner,
188 CPUHotplugState *state, hwaddr base_addr)
189{
190 MachineState *machine = MACHINE(qdev_get_machine());
191 MachineClass *mc = MACHINE_GET_CLASS(machine);
192 CPUArchIdList *id_list;
193 int i;
194
195 assert(mc->possible_cpu_arch_ids);
196 id_list = mc->possible_cpu_arch_ids(machine);
197 state->dev_count = id_list->len;
198 state->devs = g_new0(typeof(*state->devs), state->dev_count);
199 for (i = 0; i < id_list->len; i++) {
200 state->devs[i].cpu = id_list->cpus[i].cpu;
201 state->devs[i].arch_id = id_list->cpus[i].arch_id;
202 }
203 g_free(id_list);
204 memory_region_init_io(&state->ctrl_reg, owner, &cpu_hotplug_ops, state,
205 "acpi-mem-hotplug", ACPI_CPU_HOTPLUG_REG_LEN);
206 memory_region_add_subregion(as, base_addr, &state->ctrl_reg);
207}
208
209static AcpiCpuStatus *get_cpu_status(CPUHotplugState *cpu_st, DeviceState *dev)
210{
211 CPUClass *k = CPU_GET_CLASS(dev);
212 uint64_t cpu_arch_id = k->get_arch_id(CPU(dev));
213 int i;
214
215 for (i = 0; i < cpu_st->dev_count; i++) {
216 if (cpu_arch_id == cpu_st->devs[i].arch_id) {
217 return &cpu_st->devs[i];
218 }
219 }
220 return NULL;
221}
222
223void acpi_cpu_plug_cb(HotplugHandler *hotplug_dev,
224 CPUHotplugState *cpu_st, DeviceState *dev, Error **errp)
225{
226 AcpiCpuStatus *cdev;
227
228 cdev = get_cpu_status(cpu_st, dev);
229 if (!cdev) {
230 return;
231 }
232
233 cdev->cpu = CPU(dev);
234 if (dev->hotplugged) {
235 cdev->is_inserting = true;
236 acpi_send_event(DEVICE(hotplug_dev), ACPI_CPU_HOTPLUG_STATUS);
237 }
238}
239
240void acpi_cpu_unplug_request_cb(HotplugHandler *hotplug_dev,
241 CPUHotplugState *cpu_st,
242 DeviceState *dev, Error **errp)
243{
244 AcpiCpuStatus *cdev;
245
246 cdev = get_cpu_status(cpu_st, dev);
247 if (!cdev) {
248 return;
249 }
250
251 cdev->is_removing = true;
252 acpi_send_event(DEVICE(hotplug_dev), ACPI_CPU_HOTPLUG_STATUS);
253}
254
255void acpi_cpu_unplug_cb(CPUHotplugState *cpu_st,
256 DeviceState *dev, Error **errp)
257{
258 AcpiCpuStatus *cdev;
259
260 cdev = get_cpu_status(cpu_st, dev);
261 if (!cdev) {
262 return;
263 }
264
265 cdev->cpu = NULL;
266}
267
268static const VMStateDescription vmstate_cpuhp_sts = {
269 .name = "CPU hotplug device state",
270 .version_id = 1,
271 .minimum_version_id = 1,
272 .minimum_version_id_old = 1,
273 .fields = (VMStateField[]) {
274 VMSTATE_BOOL(is_inserting, AcpiCpuStatus),
275 VMSTATE_BOOL(is_removing, AcpiCpuStatus),
276 VMSTATE_UINT32(ost_event, AcpiCpuStatus),
277 VMSTATE_UINT32(ost_status, AcpiCpuStatus),
278 VMSTATE_END_OF_LIST()
279 }
280};
281
282const VMStateDescription vmstate_cpu_hotplug = {
283 .name = "CPU hotplug state",
284 .version_id = 1,
285 .minimum_version_id = 1,
286 .minimum_version_id_old = 1,
287 .fields = (VMStateField[]) {
288 VMSTATE_UINT32(selector, CPUHotplugState),
289 VMSTATE_UINT8(command, CPUHotplugState),
290 VMSTATE_STRUCT_VARRAY_POINTER_UINT32(devs, CPUHotplugState, dev_count,
291 vmstate_cpuhp_sts, AcpiCpuStatus),
292 VMSTATE_END_OF_LIST()
293 }
294};
295
296#define CPU_NAME_FMT "C%.03X"
297#define CPUHP_RES_DEVICE "PRES"
298#define CPU_LOCK "CPLK"
299#define CPU_STS_METHOD "CSTA"
300#define CPU_SCAN_METHOD "CSCN"
301#define CPU_NOTIFY_METHOD "CTFY"
302#define CPU_EJECT_METHOD "CEJ0"
303#define CPU_OST_METHOD "COST"
304
305#define CPU_ENABLED "CPEN"
306#define CPU_SELECTOR "CSEL"
307#define CPU_COMMAND "CCMD"
308#define CPU_DATA "CDAT"
309#define CPU_INSERT_EVENT "CINS"
310#define CPU_REMOVE_EVENT "CRMV"
311#define CPU_EJECT_EVENT "CEJ0"
312
313void build_cpus_aml(Aml *table, MachineState *machine, CPUHotplugFeatures opts,
314 hwaddr io_base,
315 const char *res_root,
316 const char *event_handler_method)
317{
318 Aml *ifctx;
319 Aml *field;
320 Aml *method;
321 Aml *cpu_ctrl_dev;
322 Aml *cpus_dev;
323 Aml *zero = aml_int(0);
324 Aml *one = aml_int(1);
325 Aml *sb_scope = aml_scope("_SB");
326 MachineClass *mc = MACHINE_GET_CLASS(machine);
327 CPUArchIdList *arch_ids = mc->possible_cpu_arch_ids(machine);
328 char *cphp_res_path = g_strdup_printf("%s." CPUHP_RES_DEVICE, res_root);
329 Object *obj = object_resolve_path_type("", TYPE_ACPI_DEVICE_IF, NULL);
330 AcpiDeviceIfClass *adevc = ACPI_DEVICE_IF_GET_CLASS(obj);
331 AcpiDeviceIf *adev = ACPI_DEVICE_IF(obj);
332
333 cpu_ctrl_dev = aml_device("%s", cphp_res_path);
334 {
335 Aml *crs;
336
337 aml_append(cpu_ctrl_dev,
338 aml_name_decl("_HID", aml_eisaid("PNP0A06")));
339 aml_append(cpu_ctrl_dev,
340 aml_name_decl("_UID", aml_string("CPU Hotplug resources")));
341 aml_append(cpu_ctrl_dev, aml_mutex(CPU_LOCK, 0));
342
343 crs = aml_resource_template();
344 aml_append(crs, aml_io(AML_DECODE16, io_base, io_base, 1,
345 ACPI_CPU_HOTPLUG_REG_LEN));
346 aml_append(cpu_ctrl_dev, aml_name_decl("_CRS", crs));
347
348
349 aml_append(cpu_ctrl_dev,
350 aml_operation_region("PRST", AML_SYSTEM_IO, aml_int(io_base),
351 ACPI_CPU_HOTPLUG_REG_LEN));
352
353 field = aml_field("PRST", AML_BYTE_ACC, AML_NOLOCK,
354 AML_WRITE_AS_ZEROS);
355 aml_append(field, aml_reserved_field(ACPI_CPU_FLAGS_OFFSET_RW * 8));
356
357 aml_append(field, aml_named_field(CPU_ENABLED, 1));
358
359 aml_append(field, aml_named_field(CPU_INSERT_EVENT, 1));
360
361 aml_append(field, aml_named_field(CPU_REMOVE_EVENT, 1));
362
363 aml_append(field, aml_named_field(CPU_EJECT_EVENT, 1));
364 aml_append(field, aml_reserved_field(4));
365 aml_append(field, aml_named_field(CPU_COMMAND, 8));
366 aml_append(cpu_ctrl_dev, field);
367
368 field = aml_field("PRST", AML_DWORD_ACC, AML_NOLOCK, AML_PRESERVE);
369
370 aml_append(field, aml_named_field(CPU_SELECTOR, 32));
371
372 aml_append(field, aml_reserved_field(4 * 8));
373 aml_append(field, aml_named_field(CPU_DATA, 32));
374 aml_append(cpu_ctrl_dev, field);
375
376 if (opts.has_legacy_cphp) {
377 method = aml_method("_INI", 0, AML_SERIALIZED);
378
379
380
381
382 aml_append(method, aml_store(zero, aml_name(CPU_SELECTOR)));
383 aml_append(cpu_ctrl_dev, method);
384 }
385 }
386 aml_append(sb_scope, cpu_ctrl_dev);
387
388 cpus_dev = aml_device("\\_SB.CPUS");
389 {
390 int i;
391 Aml *ctrl_lock = aml_name("%s.%s", cphp_res_path, CPU_LOCK);
392 Aml *cpu_selector = aml_name("%s.%s", cphp_res_path, CPU_SELECTOR);
393 Aml *is_enabled = aml_name("%s.%s", cphp_res_path, CPU_ENABLED);
394 Aml *cpu_cmd = aml_name("%s.%s", cphp_res_path, CPU_COMMAND);
395 Aml *cpu_data = aml_name("%s.%s", cphp_res_path, CPU_DATA);
396 Aml *ins_evt = aml_name("%s.%s", cphp_res_path, CPU_INSERT_EVENT);
397 Aml *rm_evt = aml_name("%s.%s", cphp_res_path, CPU_REMOVE_EVENT);
398 Aml *ej_evt = aml_name("%s.%s", cphp_res_path, CPU_EJECT_EVENT);
399
400 aml_append(cpus_dev, aml_name_decl("_HID", aml_string("ACPI0010")));
401 aml_append(cpus_dev, aml_name_decl("_CID", aml_eisaid("PNP0A05")));
402
403 method = aml_method(CPU_NOTIFY_METHOD, 2, AML_NOTSERIALIZED);
404 for (i = 0; i < arch_ids->len; i++) {
405 Aml *cpu = aml_name(CPU_NAME_FMT, i);
406 Aml *uid = aml_arg(0);
407 Aml *event = aml_arg(1);
408
409 ifctx = aml_if(aml_equal(uid, aml_int(i)));
410 {
411 aml_append(ifctx, aml_notify(cpu, event));
412 }
413 aml_append(method, ifctx);
414 }
415 aml_append(cpus_dev, method);
416
417 method = aml_method(CPU_STS_METHOD, 1, AML_SERIALIZED);
418 {
419 Aml *idx = aml_arg(0);
420 Aml *sta = aml_local(0);
421
422 aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
423 aml_append(method, aml_store(idx, cpu_selector));
424 aml_append(method, aml_store(zero, sta));
425 ifctx = aml_if(aml_equal(is_enabled, one));
426 {
427 aml_append(ifctx, aml_store(aml_int(0xF), sta));
428 }
429 aml_append(method, ifctx);
430 aml_append(method, aml_release(ctrl_lock));
431 aml_append(method, aml_return(sta));
432 }
433 aml_append(cpus_dev, method);
434
435 method = aml_method(CPU_EJECT_METHOD, 1, AML_SERIALIZED);
436 {
437 Aml *idx = aml_arg(0);
438
439 aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
440 aml_append(method, aml_store(idx, cpu_selector));
441 aml_append(method, aml_store(one, ej_evt));
442 aml_append(method, aml_release(ctrl_lock));
443 }
444 aml_append(cpus_dev, method);
445
446 method = aml_method(CPU_SCAN_METHOD, 0, AML_SERIALIZED);
447 {
448 Aml *else_ctx;
449 Aml *while_ctx;
450 Aml *has_event = aml_local(0);
451 Aml *dev_chk = aml_int(1);
452 Aml *eject_req = aml_int(3);
453 Aml *next_cpu_cmd = aml_int(CPHP_GET_NEXT_CPU_WITH_EVENT_CMD);
454
455 aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
456 aml_append(method, aml_store(one, has_event));
457 while_ctx = aml_while(aml_equal(has_event, one));
458 {
459
460
461
462 aml_append(while_ctx, aml_store(zero, has_event));
463 aml_append(while_ctx, aml_store(next_cpu_cmd, cpu_cmd));
464 ifctx = aml_if(aml_equal(ins_evt, one));
465 {
466 aml_append(ifctx,
467 aml_call2(CPU_NOTIFY_METHOD, cpu_data, dev_chk));
468 aml_append(ifctx, aml_store(one, ins_evt));
469 aml_append(ifctx, aml_store(one, has_event));
470 }
471 aml_append(while_ctx, ifctx);
472 else_ctx = aml_else();
473 ifctx = aml_if(aml_equal(rm_evt, one));
474 {
475 aml_append(ifctx,
476 aml_call2(CPU_NOTIFY_METHOD, cpu_data, eject_req));
477 aml_append(ifctx, aml_store(one, rm_evt));
478 aml_append(ifctx, aml_store(one, has_event));
479 }
480 aml_append(else_ctx, ifctx);
481 aml_append(while_ctx, else_ctx);
482 }
483 aml_append(method, while_ctx);
484 aml_append(method, aml_release(ctrl_lock));
485 }
486 aml_append(cpus_dev, method);
487
488 method = aml_method(CPU_OST_METHOD, 4, AML_SERIALIZED);
489 {
490 Aml *uid = aml_arg(0);
491 Aml *ev_cmd = aml_int(CPHP_OST_EVENT_CMD);
492 Aml *st_cmd = aml_int(CPHP_OST_STATUS_CMD);
493
494 aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
495 aml_append(method, aml_store(uid, cpu_selector));
496 aml_append(method, aml_store(ev_cmd, cpu_cmd));
497 aml_append(method, aml_store(aml_arg(1), cpu_data));
498 aml_append(method, aml_store(st_cmd, cpu_cmd));
499 aml_append(method, aml_store(aml_arg(2), cpu_data));
500 aml_append(method, aml_release(ctrl_lock));
501 }
502 aml_append(cpus_dev, method);
503
504
505 for (i = 0; i < arch_ids->len; i++) {
506 Aml *dev;
507 Aml *uid = aml_int(i);
508 GArray *madt_buf = g_array_new(0, 1, 1);
509 int arch_id = arch_ids->cpus[i].arch_id;
510
511 if (opts.apci_1_compatible && arch_id < 255) {
512 dev = aml_processor(i, 0, 0, CPU_NAME_FMT, i);
513 } else {
514 dev = aml_device(CPU_NAME_FMT, i);
515 aml_append(dev, aml_name_decl("_HID", aml_string("ACPI0007")));
516 aml_append(dev, aml_name_decl("_UID", uid));
517 }
518
519 method = aml_method("_STA", 0, AML_SERIALIZED);
520 aml_append(method, aml_return(aml_call1(CPU_STS_METHOD, uid)));
521 aml_append(dev, method);
522
523
524 assert(adevc && adevc->madt_cpu);
525 adevc->madt_cpu(adev, i, arch_ids, madt_buf);
526 switch (madt_buf->data[0]) {
527 case ACPI_APIC_PROCESSOR: {
528 AcpiMadtProcessorApic *apic = (void *)madt_buf->data;
529 apic->flags = cpu_to_le32(1);
530 break;
531 }
532 default:
533 assert(0);
534 }
535 aml_append(dev, aml_name_decl("_MAT",
536 aml_buffer(madt_buf->len, (uint8_t *)madt_buf->data)));
537 g_array_free(madt_buf, true);
538
539 method = aml_method("_EJ0", 1, AML_NOTSERIALIZED);
540 aml_append(method, aml_call1(CPU_EJECT_METHOD, uid));
541 aml_append(dev, method);
542
543 method = aml_method("_OST", 3, AML_SERIALIZED);
544 aml_append(method,
545 aml_call4(CPU_OST_METHOD, uid, aml_arg(0),
546 aml_arg(1), aml_arg(2))
547 );
548 aml_append(dev, method);
549 aml_append(cpus_dev, dev);
550 }
551 }
552 aml_append(sb_scope, cpus_dev);
553 aml_append(table, sb_scope);
554
555 method = aml_method(event_handler_method, 0, AML_NOTSERIALIZED);
556 aml_append(method, aml_call0("\\_SB.CPUS." CPU_SCAN_METHOD));
557 aml_append(table, method);
558
559 g_free(cphp_res_path);
560 g_free(arch_ids);
561}
562
