ivshmem: Implement shm=... with a memory backend
[qemu/kevin.git] / hw / ppc / spapr_events.c
blob39f4682f957f7c8feb9ec015ddc650bce7ada4d0
1 /*
2 * QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator
4 * RTAS events handling
6 * Copyright (c) 2012 David Gibson, IBM Corporation.
8 * Permission is hereby granted, free of charge, to any person obtaining a copy
9 * of this software and associated documentation files (the "Software"), to deal
10 * in the Software without restriction, including without limitation the rights
11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
12 * copies of the Software, and to permit persons to whom the Software is
13 * furnished to do so, subject to the following conditions:
15 * The above copyright notice and this permission notice shall be included in
16 * all copies or substantial portions of the Software.
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
24 * THE SOFTWARE.
27 #include "qemu/osdep.h"
28 #include "cpu.h"
29 #include "sysemu/sysemu.h"
30 #include "sysemu/char.h"
31 #include "hw/qdev.h"
32 #include "sysemu/device_tree.h"
34 #include "hw/ppc/spapr.h"
35 #include "hw/ppc/spapr_vio.h"
36 #include "hw/pci/pci.h"
37 #include "hw/pci-host/spapr.h"
38 #include "hw/ppc/spapr_drc.h"
40 #include <libfdt.h>
42 struct rtas_error_log {
43 uint32_t summary;
44 #define RTAS_LOG_VERSION_MASK 0xff000000
45 #define RTAS_LOG_VERSION_6 0x06000000
46 #define RTAS_LOG_SEVERITY_MASK 0x00e00000
47 #define RTAS_LOG_SEVERITY_ALREADY_REPORTED 0x00c00000
48 #define RTAS_LOG_SEVERITY_FATAL 0x00a00000
49 #define RTAS_LOG_SEVERITY_ERROR 0x00800000
50 #define RTAS_LOG_SEVERITY_ERROR_SYNC 0x00600000
51 #define RTAS_LOG_SEVERITY_WARNING 0x00400000
52 #define RTAS_LOG_SEVERITY_EVENT 0x00200000
53 #define RTAS_LOG_SEVERITY_NO_ERROR 0x00000000
54 #define RTAS_LOG_DISPOSITION_MASK 0x00180000
55 #define RTAS_LOG_DISPOSITION_FULLY_RECOVERED 0x00000000
56 #define RTAS_LOG_DISPOSITION_LIMITED_RECOVERY 0x00080000
57 #define RTAS_LOG_DISPOSITION_NOT_RECOVERED 0x00100000
58 #define RTAS_LOG_OPTIONAL_PART_PRESENT 0x00040000
59 #define RTAS_LOG_INITIATOR_MASK 0x0000f000
60 #define RTAS_LOG_INITIATOR_UNKNOWN 0x00000000
61 #define RTAS_LOG_INITIATOR_CPU 0x00001000
62 #define RTAS_LOG_INITIATOR_PCI 0x00002000
63 #define RTAS_LOG_INITIATOR_MEMORY 0x00004000
64 #define RTAS_LOG_INITIATOR_HOTPLUG 0x00006000
65 #define RTAS_LOG_TARGET_MASK 0x00000f00
66 #define RTAS_LOG_TARGET_UNKNOWN 0x00000000
67 #define RTAS_LOG_TARGET_CPU 0x00000100
68 #define RTAS_LOG_TARGET_PCI 0x00000200
69 #define RTAS_LOG_TARGET_MEMORY 0x00000400
70 #define RTAS_LOG_TARGET_HOTPLUG 0x00000600
71 #define RTAS_LOG_TYPE_MASK 0x000000ff
72 #define RTAS_LOG_TYPE_OTHER 0x00000000
73 #define RTAS_LOG_TYPE_RETRY 0x00000001
74 #define RTAS_LOG_TYPE_TCE_ERR 0x00000002
75 #define RTAS_LOG_TYPE_INTERN_DEV_FAIL 0x00000003
76 #define RTAS_LOG_TYPE_TIMEOUT 0x00000004
77 #define RTAS_LOG_TYPE_DATA_PARITY 0x00000005
78 #define RTAS_LOG_TYPE_ADDR_PARITY 0x00000006
79 #define RTAS_LOG_TYPE_CACHE_PARITY 0x00000007
80 #define RTAS_LOG_TYPE_ADDR_INVALID 0x00000008
81 #define RTAS_LOG_TYPE_ECC_UNCORR 0x00000009
82 #define RTAS_LOG_TYPE_ECC_CORR 0x0000000a
83 #define RTAS_LOG_TYPE_EPOW 0x00000040
84 #define RTAS_LOG_TYPE_HOTPLUG 0x000000e5
85 uint32_t extended_length;
86 } QEMU_PACKED;
88 struct rtas_event_log_v6 {
89 uint8_t b0;
90 #define RTAS_LOG_V6_B0_VALID 0x80
91 #define RTAS_LOG_V6_B0_UNRECOVERABLE_ERROR 0x40
92 #define RTAS_LOG_V6_B0_RECOVERABLE_ERROR 0x20
93 #define RTAS_LOG_V6_B0_DEGRADED_OPERATION 0x10
94 #define RTAS_LOG_V6_B0_PREDICTIVE_ERROR 0x08
95 #define RTAS_LOG_V6_B0_NEW_LOG 0x04
96 #define RTAS_LOG_V6_B0_BIGENDIAN 0x02
97 uint8_t _resv1;
98 uint8_t b2;
99 #define RTAS_LOG_V6_B2_POWERPC_FORMAT 0x80
100 #define RTAS_LOG_V6_B2_LOG_FORMAT_MASK 0x0f
101 #define RTAS_LOG_V6_B2_LOG_FORMAT_PLATFORM_EVENT 0x0e
102 uint8_t _resv2[9];
103 uint32_t company;
104 #define RTAS_LOG_V6_COMPANY_IBM 0x49424d00 /* IBM<null> */
105 } QEMU_PACKED;
107 struct rtas_event_log_v6_section_header {
108 uint16_t section_id;
109 uint16_t section_length;
110 uint8_t section_version;
111 uint8_t section_subtype;
112 uint16_t creator_component_id;
113 } QEMU_PACKED;
115 struct rtas_event_log_v6_maina {
116 #define RTAS_LOG_V6_SECTION_ID_MAINA 0x5048 /* PH */
117 struct rtas_event_log_v6_section_header hdr;
118 uint32_t creation_date; /* BCD: YYYYMMDD */
119 uint32_t creation_time; /* BCD: HHMMSS00 */
120 uint8_t _platform1[8];
121 char creator_id;
122 uint8_t _resv1[2];
123 uint8_t section_count;
124 uint8_t _resv2[4];
125 uint8_t _platform2[8];
126 uint32_t plid;
127 uint8_t _platform3[4];
128 } QEMU_PACKED;
130 struct rtas_event_log_v6_mainb {
131 #define RTAS_LOG_V6_SECTION_ID_MAINB 0x5548 /* UH */
132 struct rtas_event_log_v6_section_header hdr;
133 uint8_t subsystem_id;
134 uint8_t _platform1;
135 uint8_t event_severity;
136 uint8_t event_subtype;
137 uint8_t _platform2[4];
138 uint8_t _resv1[2];
139 uint16_t action_flags;
140 uint8_t _resv2[4];
141 } QEMU_PACKED;
143 struct rtas_event_log_v6_epow {
144 #define RTAS_LOG_V6_SECTION_ID_EPOW 0x4550 /* EP */
145 struct rtas_event_log_v6_section_header hdr;
146 uint8_t sensor_value;
147 #define RTAS_LOG_V6_EPOW_ACTION_RESET 0
148 #define RTAS_LOG_V6_EPOW_ACTION_WARN_COOLING 1
149 #define RTAS_LOG_V6_EPOW_ACTION_WARN_POWER 2
150 #define RTAS_LOG_V6_EPOW_ACTION_SYSTEM_SHUTDOWN 3
151 #define RTAS_LOG_V6_EPOW_ACTION_SYSTEM_HALT 4
152 #define RTAS_LOG_V6_EPOW_ACTION_MAIN_ENCLOSURE 5
153 #define RTAS_LOG_V6_EPOW_ACTION_POWER_OFF 7
154 uint8_t event_modifier;
155 #define RTAS_LOG_V6_EPOW_MODIFIER_NORMAL 1
156 #define RTAS_LOG_V6_EPOW_MODIFIER_ON_UPS 2
157 #define RTAS_LOG_V6_EPOW_MODIFIER_CRITICAL 3
158 #define RTAS_LOG_V6_EPOW_MODIFIER_TEMPERATURE 4
159 uint8_t extended_modifier;
160 #define RTAS_LOG_V6_EPOW_XMODIFIER_SYSTEM_WIDE 0
161 #define RTAS_LOG_V6_EPOW_XMODIFIER_PARTITION_SPECIFIC 1
162 uint8_t _resv;
163 uint64_t reason_code;
164 } QEMU_PACKED;
166 struct epow_log_full {
167 struct rtas_error_log hdr;
168 struct rtas_event_log_v6 v6hdr;
169 struct rtas_event_log_v6_maina maina;
170 struct rtas_event_log_v6_mainb mainb;
171 struct rtas_event_log_v6_epow epow;
172 } QEMU_PACKED;
174 struct rtas_event_log_v6_hp {
175 #define RTAS_LOG_V6_SECTION_ID_HOTPLUG 0x4850 /* HP */
176 struct rtas_event_log_v6_section_header hdr;
177 uint8_t hotplug_type;
178 #define RTAS_LOG_V6_HP_TYPE_CPU 1
179 #define RTAS_LOG_V6_HP_TYPE_MEMORY 2
180 #define RTAS_LOG_V6_HP_TYPE_SLOT 3
181 #define RTAS_LOG_V6_HP_TYPE_PHB 4
182 #define RTAS_LOG_V6_HP_TYPE_PCI 5
183 uint8_t hotplug_action;
184 #define RTAS_LOG_V6_HP_ACTION_ADD 1
185 #define RTAS_LOG_V6_HP_ACTION_REMOVE 2
186 uint8_t hotplug_identifier;
187 #define RTAS_LOG_V6_HP_ID_DRC_NAME 1
188 #define RTAS_LOG_V6_HP_ID_DRC_INDEX 2
189 #define RTAS_LOG_V6_HP_ID_DRC_COUNT 3
190 uint8_t reserved;
191 union {
192 uint32_t index;
193 uint32_t count;
194 char name[1];
195 } drc;
196 } QEMU_PACKED;
198 struct hp_log_full {
199 struct rtas_error_log hdr;
200 struct rtas_event_log_v6 v6hdr;
201 struct rtas_event_log_v6_maina maina;
202 struct rtas_event_log_v6_mainb mainb;
203 struct rtas_event_log_v6_hp hp;
204 } QEMU_PACKED;
206 #define EVENT_MASK_INTERNAL_ERRORS 0x80000000
207 #define EVENT_MASK_EPOW 0x40000000
208 #define EVENT_MASK_HOTPLUG 0x10000000
209 #define EVENT_MASK_IO 0x08000000
211 #define _FDT(exp) \
212 do { \
213 int ret = (exp); \
214 if (ret < 0) { \
215 fprintf(stderr, "qemu: error creating device tree: %s: %s\n", \
216 #exp, fdt_strerror(ret)); \
217 exit(1); \
219 } while (0)
221 void spapr_events_fdt_skel(void *fdt, uint32_t check_exception_irq)
223 uint32_t irq_ranges[] = {cpu_to_be32(check_exception_irq), cpu_to_be32(1)};
224 uint32_t interrupts[] = {cpu_to_be32(check_exception_irq), 0};
226 _FDT((fdt_begin_node(fdt, "event-sources")));
228 _FDT((fdt_property(fdt, "interrupt-controller", NULL, 0)));
229 _FDT((fdt_property_cell(fdt, "#interrupt-cells", 2)));
230 _FDT((fdt_property(fdt, "interrupt-ranges",
231 irq_ranges, sizeof(irq_ranges))));
233 _FDT((fdt_begin_node(fdt, "epow-events")));
234 _FDT((fdt_property(fdt, "interrupts", interrupts, sizeof(interrupts))));
235 _FDT((fdt_end_node(fdt)));
237 _FDT((fdt_end_node(fdt)));
240 static void rtas_event_log_queue(int log_type, void *data, bool exception)
242 sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
243 sPAPREventLogEntry *entry = g_new(sPAPREventLogEntry, 1);
245 g_assert(data);
246 entry->log_type = log_type;
247 entry->exception = exception;
248 entry->data = data;
249 QTAILQ_INSERT_TAIL(&spapr->pending_events, entry, next);
252 static sPAPREventLogEntry *rtas_event_log_dequeue(uint32_t event_mask,
253 bool exception)
255 sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
256 sPAPREventLogEntry *entry = NULL;
258 /* we only queue EPOW events atm. */
259 if ((event_mask & EVENT_MASK_EPOW) == 0) {
260 return NULL;
263 QTAILQ_FOREACH(entry, &spapr->pending_events, next) {
264 if (entry->exception != exception) {
265 continue;
268 /* EPOW and hotplug events are surfaced in the same manner */
269 if (entry->log_type == RTAS_LOG_TYPE_EPOW ||
270 entry->log_type == RTAS_LOG_TYPE_HOTPLUG) {
271 break;
275 if (entry) {
276 QTAILQ_REMOVE(&spapr->pending_events, entry, next);
279 return entry;
282 static bool rtas_event_log_contains(uint32_t event_mask, bool exception)
284 sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
285 sPAPREventLogEntry *entry = NULL;
287 /* we only queue EPOW events atm. */
288 if ((event_mask & EVENT_MASK_EPOW) == 0) {
289 return false;
292 QTAILQ_FOREACH(entry, &spapr->pending_events, next) {
293 if (entry->exception != exception) {
294 continue;
297 /* EPOW and hotplug events are surfaced in the same manner */
298 if (entry->log_type == RTAS_LOG_TYPE_EPOW ||
299 entry->log_type == RTAS_LOG_TYPE_HOTPLUG) {
300 return true;
304 return false;
307 static uint32_t next_plid;
309 static void spapr_init_v6hdr(struct rtas_event_log_v6 *v6hdr)
311 v6hdr->b0 = RTAS_LOG_V6_B0_VALID | RTAS_LOG_V6_B0_NEW_LOG
312 | RTAS_LOG_V6_B0_BIGENDIAN;
313 v6hdr->b2 = RTAS_LOG_V6_B2_POWERPC_FORMAT
314 | RTAS_LOG_V6_B2_LOG_FORMAT_PLATFORM_EVENT;
315 v6hdr->company = cpu_to_be32(RTAS_LOG_V6_COMPANY_IBM);
318 static void spapr_init_maina(struct rtas_event_log_v6_maina *maina,
319 int section_count)
321 sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
322 struct tm tm;
323 int year;
325 maina->hdr.section_id = cpu_to_be16(RTAS_LOG_V6_SECTION_ID_MAINA);
326 maina->hdr.section_length = cpu_to_be16(sizeof(*maina));
327 /* FIXME: section version, subtype and creator id? */
328 spapr_rtc_read(spapr->rtc, &tm, NULL);
329 year = tm.tm_year + 1900;
330 maina->creation_date = cpu_to_be32((to_bcd(year / 100) << 24)
331 | (to_bcd(year % 100) << 16)
332 | (to_bcd(tm.tm_mon + 1) << 8)
333 | to_bcd(tm.tm_mday));
334 maina->creation_time = cpu_to_be32((to_bcd(tm.tm_hour) << 24)
335 | (to_bcd(tm.tm_min) << 16)
336 | (to_bcd(tm.tm_sec) << 8));
337 maina->creator_id = 'H'; /* Hypervisor */
338 maina->section_count = section_count;
339 maina->plid = next_plid++;
342 static void spapr_powerdown_req(Notifier *n, void *opaque)
344 sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
345 struct rtas_error_log *hdr;
346 struct rtas_event_log_v6 *v6hdr;
347 struct rtas_event_log_v6_maina *maina;
348 struct rtas_event_log_v6_mainb *mainb;
349 struct rtas_event_log_v6_epow *epow;
350 struct epow_log_full *new_epow;
352 new_epow = g_malloc0(sizeof(*new_epow));
353 hdr = &new_epow->hdr;
354 v6hdr = &new_epow->v6hdr;
355 maina = &new_epow->maina;
356 mainb = &new_epow->mainb;
357 epow = &new_epow->epow;
359 hdr->summary = cpu_to_be32(RTAS_LOG_VERSION_6
360 | RTAS_LOG_SEVERITY_EVENT
361 | RTAS_LOG_DISPOSITION_NOT_RECOVERED
362 | RTAS_LOG_OPTIONAL_PART_PRESENT
363 | RTAS_LOG_TYPE_EPOW);
364 hdr->extended_length = cpu_to_be32(sizeof(*new_epow)
365 - sizeof(new_epow->hdr));
367 spapr_init_v6hdr(v6hdr);
368 spapr_init_maina(maina, 3 /* Main-A, Main-B and EPOW */);
370 mainb->hdr.section_id = cpu_to_be16(RTAS_LOG_V6_SECTION_ID_MAINB);
371 mainb->hdr.section_length = cpu_to_be16(sizeof(*mainb));
372 /* FIXME: section version, subtype and creator id? */
373 mainb->subsystem_id = 0xa0; /* External environment */
374 mainb->event_severity = 0x00; /* Informational / non-error */
375 mainb->event_subtype = 0xd0; /* Normal shutdown */
377 epow->hdr.section_id = cpu_to_be16(RTAS_LOG_V6_SECTION_ID_EPOW);
378 epow->hdr.section_length = cpu_to_be16(sizeof(*epow));
379 epow->hdr.section_version = 2; /* includes extended modifier */
380 /* FIXME: section subtype and creator id? */
381 epow->sensor_value = RTAS_LOG_V6_EPOW_ACTION_SYSTEM_SHUTDOWN;
382 epow->event_modifier = RTAS_LOG_V6_EPOW_MODIFIER_NORMAL;
383 epow->extended_modifier = RTAS_LOG_V6_EPOW_XMODIFIER_PARTITION_SPECIFIC;
385 rtas_event_log_queue(RTAS_LOG_TYPE_EPOW, new_epow, true);
387 qemu_irq_pulse(xics_get_qirq(spapr->icp, spapr->check_exception_irq));
390 static void spapr_hotplug_req_event(uint8_t hp_id, uint8_t hp_action,
391 sPAPRDRConnectorType drc_type,
392 uint32_t drc)
394 sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
395 struct hp_log_full *new_hp;
396 struct rtas_error_log *hdr;
397 struct rtas_event_log_v6 *v6hdr;
398 struct rtas_event_log_v6_maina *maina;
399 struct rtas_event_log_v6_mainb *mainb;
400 struct rtas_event_log_v6_hp *hp;
402 new_hp = g_malloc0(sizeof(struct hp_log_full));
403 hdr = &new_hp->hdr;
404 v6hdr = &new_hp->v6hdr;
405 maina = &new_hp->maina;
406 mainb = &new_hp->mainb;
407 hp = &new_hp->hp;
409 hdr->summary = cpu_to_be32(RTAS_LOG_VERSION_6
410 | RTAS_LOG_SEVERITY_EVENT
411 | RTAS_LOG_DISPOSITION_NOT_RECOVERED
412 | RTAS_LOG_OPTIONAL_PART_PRESENT
413 | RTAS_LOG_INITIATOR_HOTPLUG
414 | RTAS_LOG_TYPE_HOTPLUG);
415 hdr->extended_length = cpu_to_be32(sizeof(*new_hp)
416 - sizeof(new_hp->hdr));
418 spapr_init_v6hdr(v6hdr);
419 spapr_init_maina(maina, 3 /* Main-A, Main-B, HP */);
421 mainb->hdr.section_id = cpu_to_be16(RTAS_LOG_V6_SECTION_ID_MAINB);
422 mainb->hdr.section_length = cpu_to_be16(sizeof(*mainb));
423 mainb->subsystem_id = 0x80; /* External environment */
424 mainb->event_severity = 0x00; /* Informational / non-error */
425 mainb->event_subtype = 0x00; /* Normal shutdown */
427 hp->hdr.section_id = cpu_to_be16(RTAS_LOG_V6_SECTION_ID_HOTPLUG);
428 hp->hdr.section_length = cpu_to_be16(sizeof(*hp));
429 hp->hdr.section_version = 1; /* includes extended modifier */
430 hp->hotplug_action = hp_action;
431 hp->hotplug_identifier = hp_id;
433 switch (drc_type) {
434 case SPAPR_DR_CONNECTOR_TYPE_PCI:
435 hp->hotplug_type = RTAS_LOG_V6_HP_TYPE_PCI;
436 break;
437 case SPAPR_DR_CONNECTOR_TYPE_LMB:
438 hp->hotplug_type = RTAS_LOG_V6_HP_TYPE_MEMORY;
439 break;
440 default:
441 /* we shouldn't be signaling hotplug events for resources
442 * that don't support them
444 g_assert(false);
445 return;
448 if (hp_id == RTAS_LOG_V6_HP_ID_DRC_COUNT) {
449 hp->drc.count = cpu_to_be32(drc);
450 } else if (hp_id == RTAS_LOG_V6_HP_ID_DRC_INDEX) {
451 hp->drc.index = cpu_to_be32(drc);
454 rtas_event_log_queue(RTAS_LOG_TYPE_HOTPLUG, new_hp, true);
456 qemu_irq_pulse(xics_get_qirq(spapr->icp, spapr->check_exception_irq));
459 void spapr_hotplug_req_add_by_index(sPAPRDRConnector *drc)
461 sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
462 sPAPRDRConnectorType drc_type = drck->get_type(drc);
463 uint32_t index = drck->get_index(drc);
465 spapr_hotplug_req_event(RTAS_LOG_V6_HP_ID_DRC_INDEX,
466 RTAS_LOG_V6_HP_ACTION_ADD, drc_type, index);
469 void spapr_hotplug_req_remove_by_index(sPAPRDRConnector *drc)
471 sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
472 sPAPRDRConnectorType drc_type = drck->get_type(drc);
473 uint32_t index = drck->get_index(drc);
475 spapr_hotplug_req_event(RTAS_LOG_V6_HP_ID_DRC_INDEX,
476 RTAS_LOG_V6_HP_ACTION_REMOVE, drc_type, index);
479 void spapr_hotplug_req_add_by_count(sPAPRDRConnectorType drc_type,
480 uint32_t count)
482 spapr_hotplug_req_event(RTAS_LOG_V6_HP_ID_DRC_COUNT,
483 RTAS_LOG_V6_HP_ACTION_ADD, drc_type, count);
486 void spapr_hotplug_req_remove_by_count(sPAPRDRConnectorType drc_type,
487 uint32_t count)
489 spapr_hotplug_req_event(RTAS_LOG_V6_HP_ID_DRC_COUNT,
490 RTAS_LOG_V6_HP_ACTION_REMOVE, drc_type, count);
493 static void check_exception(PowerPCCPU *cpu, sPAPRMachineState *spapr,
494 uint32_t token, uint32_t nargs,
495 target_ulong args,
496 uint32_t nret, target_ulong rets)
498 uint32_t mask, buf, len, event_len;
499 uint64_t xinfo;
500 sPAPREventLogEntry *event;
501 struct rtas_error_log *hdr;
503 if ((nargs < 6) || (nargs > 7) || nret != 1) {
504 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
505 return;
508 xinfo = rtas_ld(args, 1);
509 mask = rtas_ld(args, 2);
510 buf = rtas_ld(args, 4);
511 len = rtas_ld(args, 5);
512 if (nargs == 7) {
513 xinfo |= (uint64_t)rtas_ld(args, 6) << 32;
516 event = rtas_event_log_dequeue(mask, true);
517 if (!event) {
518 goto out_no_events;
521 hdr = event->data;
522 event_len = be32_to_cpu(hdr->extended_length) + sizeof(*hdr);
524 if (event_len < len) {
525 len = event_len;
528 cpu_physical_memory_write(buf, event->data, len);
529 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
530 g_free(event->data);
531 g_free(event);
533 /* according to PAPR+, the IRQ must be left asserted, or re-asserted, if
534 * there are still pending events to be fetched via check-exception. We
535 * do the latter here, since our code relies on edge-triggered
536 * interrupts.
538 if (rtas_event_log_contains(mask, true)) {
539 qemu_irq_pulse(xics_get_qirq(spapr->icp, spapr->check_exception_irq));
542 return;
544 out_no_events:
545 rtas_st(rets, 0, RTAS_OUT_NO_ERRORS_FOUND);
548 static void event_scan(PowerPCCPU *cpu, sPAPRMachineState *spapr,
549 uint32_t token, uint32_t nargs,
550 target_ulong args,
551 uint32_t nret, target_ulong rets)
553 uint32_t mask, buf, len, event_len;
554 sPAPREventLogEntry *event;
555 struct rtas_error_log *hdr;
557 if (nargs != 4 || nret != 1) {
558 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
559 return;
562 mask = rtas_ld(args, 0);
563 buf = rtas_ld(args, 2);
564 len = rtas_ld(args, 3);
566 event = rtas_event_log_dequeue(mask, false);
567 if (!event) {
568 goto out_no_events;
571 hdr = event->data;
572 event_len = be32_to_cpu(hdr->extended_length) + sizeof(*hdr);
574 if (event_len < len) {
575 len = event_len;
578 cpu_physical_memory_write(buf, event->data, len);
579 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
580 g_free(event->data);
581 g_free(event);
582 return;
584 out_no_events:
585 rtas_st(rets, 0, RTAS_OUT_NO_ERRORS_FOUND);
588 void spapr_events_init(sPAPRMachineState *spapr)
590 QTAILQ_INIT(&spapr->pending_events);
591 spapr->check_exception_irq = xics_alloc(spapr->icp, 0, 0, false,
592 &error_fatal);
593 spapr->epow_notifier.notify = spapr_powerdown_req;
594 qemu_register_powerdown_notifier(&spapr->epow_notifier);
595 spapr_rtas_register(RTAS_CHECK_EXCEPTION, "check-exception",
596 check_exception);
597 spapr_rtas_register(RTAS_EVENT_SCAN, "event-scan", event_scan);