hw/ppc/spapr_events.c

   1 /*
   2  * QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator
   3  *
   4  * RTAS events handling
   5  *
   6  * Copyright (c) 2012 David Gibson, IBM Corporation.
   7  *
   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:
  14  *
  15  * The above copyright notice and this permission notice shall be included in
  16  * all copies or substantial portions of the Software.
  17  *
  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.
  25  *
  26  */
  27 #include "qemu/osdep.h"
  28 #include "qapi/error.h"
  29 #include "cpu.h"
  30 #include "sysemu/sysemu.h"
  31 #include "hw/qdev.h"
  32 #include "sysemu/device_tree.h"
  33
  34 #include "hw/ppc/fdt.h"
  35 #include "hw/ppc/spapr.h"
  36 #include "hw/ppc/spapr_vio.h"
  37 #include "hw/pci/pci.h"
  38 #include "hw/pci-host/spapr.h"
  39 #include "hw/ppc/spapr_drc.h"
  40 #include "qemu/help_option.h"
  41 #include "qemu/bcd.h"
  42 #include "hw/ppc/spapr_ovec.h"
  43 #include <libfdt.h>
  44
  45 #define RTAS_LOG_VERSION_MASK                   0xff000000
  46 #define   RTAS_LOG_VERSION_6                    0x06000000
  47 #define RTAS_LOG_SEVERITY_MASK                  0x00e00000
  48 #define   RTAS_LOG_SEVERITY_ALREADY_REPORTED    0x00c00000
  49 #define   RTAS_LOG_SEVERITY_FATAL               0x00a00000
  50 #define   RTAS_LOG_SEVERITY_ERROR               0x00800000
  51 #define   RTAS_LOG_SEVERITY_ERROR_SYNC          0x00600000
  52 #define   RTAS_LOG_SEVERITY_WARNING             0x00400000
  53 #define   RTAS_LOG_SEVERITY_EVENT               0x00200000
  54 #define   RTAS_LOG_SEVERITY_NO_ERROR            0x00000000
  55 #define RTAS_LOG_DISPOSITION_MASK               0x00180000
  56 #define   RTAS_LOG_DISPOSITION_FULLY_RECOVERED  0x00000000
  57 #define   RTAS_LOG_DISPOSITION_LIMITED_RECOVERY 0x00080000
  58 #define   RTAS_LOG_DISPOSITION_NOT_RECOVERED    0x00100000
  59 #define RTAS_LOG_OPTIONAL_PART_PRESENT          0x00040000
  60 #define RTAS_LOG_INITIATOR_MASK                 0x0000f000
  61 #define   RTAS_LOG_INITIATOR_UNKNOWN            0x00000000
  62 #define   RTAS_LOG_INITIATOR_CPU                0x00001000
  63 #define   RTAS_LOG_INITIATOR_PCI                0x00002000
  64 #define   RTAS_LOG_INITIATOR_MEMORY             0x00004000
  65 #define   RTAS_LOG_INITIATOR_HOTPLUG            0x00006000
  66 #define RTAS_LOG_TARGET_MASK                    0x00000f00
  67 #define   RTAS_LOG_TARGET_UNKNOWN               0x00000000
  68 #define   RTAS_LOG_TARGET_CPU                   0x00000100
  69 #define   RTAS_LOG_TARGET_PCI                   0x00000200
  70 #define   RTAS_LOG_TARGET_MEMORY                0x00000400
  71 #define   RTAS_LOG_TARGET_HOTPLUG               0x00000600
  72 #define RTAS_LOG_TYPE_MASK                      0x000000ff
  73 #define   RTAS_LOG_TYPE_OTHER                   0x00000000
  74 #define   RTAS_LOG_TYPE_RETRY                   0x00000001
  75 #define   RTAS_LOG_TYPE_TCE_ERR                 0x00000002
  76 #define   RTAS_LOG_TYPE_INTERN_DEV_FAIL         0x00000003
  77 #define   RTAS_LOG_TYPE_TIMEOUT                 0x00000004
  78 #define   RTAS_LOG_TYPE_DATA_PARITY             0x00000005
  79 #define   RTAS_LOG_TYPE_ADDR_PARITY             0x00000006
  80 #define   RTAS_LOG_TYPE_CACHE_PARITY            0x00000007
  81 #define   RTAS_LOG_TYPE_ADDR_INVALID            0x00000008
  82 #define   RTAS_LOG_TYPE_ECC_UNCORR              0x00000009
  83 #define   RTAS_LOG_TYPE_ECC_CORR                0x0000000a
  84 #define   RTAS_LOG_TYPE_EPOW                    0x00000040
  85 #define   RTAS_LOG_TYPE_HOTPLUG                 0x000000e5
  86
  87 struct rtas_error_log {
  88     uint32_t summary;
  89     uint32_t extended_length;
  90 } QEMU_PACKED;
  91
  92 struct rtas_event_log_v6 {
  93     uint8_t b0;
  94 #define RTAS_LOG_V6_B0_VALID                          0x80
  95 #define RTAS_LOG_V6_B0_UNRECOVERABLE_ERROR            0x40
  96 #define RTAS_LOG_V6_B0_RECOVERABLE_ERROR              0x20
  97 #define RTAS_LOG_V6_B0_DEGRADED_OPERATION             0x10
  98 #define RTAS_LOG_V6_B0_PREDICTIVE_ERROR               0x08
  99 #define RTAS_LOG_V6_B0_NEW_LOG                        0x04
 100 #define RTAS_LOG_V6_B0_BIGENDIAN                      0x02
 101     uint8_t _resv1;
 102     uint8_t b2;
 103 #define RTAS_LOG_V6_B2_POWERPC_FORMAT                 0x80
 104 #define RTAS_LOG_V6_B2_LOG_FORMAT_MASK                0x0f
 105 #define   RTAS_LOG_V6_B2_LOG_FORMAT_PLATFORM_EVENT    0x0e
 106     uint8_t _resv2[9];
 107     uint32_t company;
 108 #define RTAS_LOG_V6_COMPANY_IBM                 0x49424d00 /* IBM<null> */
 109 } QEMU_PACKED;
 110
 111 struct rtas_event_log_v6_section_header {
 112     uint16_t section_id;
 113     uint16_t section_length;
 114     uint8_t section_version;
 115     uint8_t section_subtype;
 116     uint16_t creator_component_id;
 117 } QEMU_PACKED;
 118
 119 struct rtas_event_log_v6_maina {
 120 #define RTAS_LOG_V6_SECTION_ID_MAINA                0x5048 /* PH */
 121     struct rtas_event_log_v6_section_header hdr;
 122     uint32_t creation_date; /* BCD: YYYYMMDD */
 123     uint32_t creation_time; /* BCD: HHMMSS00 */
 124     uint8_t _platform1[8];
 125     char creator_id;
 126     uint8_t _resv1[2];
 127     uint8_t section_count;
 128     uint8_t _resv2[4];
 129     uint8_t _platform2[8];
 130     uint32_t plid;
 131     uint8_t _platform3[4];
 132 } QEMU_PACKED;
 133
 134 struct rtas_event_log_v6_mainb {
 135 #define RTAS_LOG_V6_SECTION_ID_MAINB                0x5548 /* UH */
 136     struct rtas_event_log_v6_section_header hdr;
 137     uint8_t subsystem_id;
 138     uint8_t _platform1;
 139     uint8_t event_severity;
 140     uint8_t event_subtype;
 141     uint8_t _platform2[4];
 142     uint8_t _resv1[2];
 143     uint16_t action_flags;
 144     uint8_t _resv2[4];
 145 } QEMU_PACKED;
 146
 147 struct rtas_event_log_v6_epow {
 148 #define RTAS_LOG_V6_SECTION_ID_EPOW                 0x4550 /* EP */
 149     struct rtas_event_log_v6_section_header hdr;
 150     uint8_t sensor_value;
 151 #define RTAS_LOG_V6_EPOW_ACTION_RESET                    0
 152 #define RTAS_LOG_V6_EPOW_ACTION_WARN_COOLING             1
 153 #define RTAS_LOG_V6_EPOW_ACTION_WARN_POWER               2
 154 #define RTAS_LOG_V6_EPOW_ACTION_SYSTEM_SHUTDOWN          3
 155 #define RTAS_LOG_V6_EPOW_ACTION_SYSTEM_HALT              4
 156 #define RTAS_LOG_V6_EPOW_ACTION_MAIN_ENCLOSURE           5
 157 #define RTAS_LOG_V6_EPOW_ACTION_POWER_OFF                7
 158     uint8_t event_modifier;
 159 #define RTAS_LOG_V6_EPOW_MODIFIER_NORMAL                 1
 160 #define RTAS_LOG_V6_EPOW_MODIFIER_ON_UPS                 2
 161 #define RTAS_LOG_V6_EPOW_MODIFIER_CRITICAL               3
 162 #define RTAS_LOG_V6_EPOW_MODIFIER_TEMPERATURE            4
 163     uint8_t extended_modifier;
 164 #define RTAS_LOG_V6_EPOW_XMODIFIER_SYSTEM_WIDE           0
 165 #define RTAS_LOG_V6_EPOW_XMODIFIER_PARTITION_SPECIFIC    1
 166     uint8_t _resv;
 167     uint64_t reason_code;
 168 } QEMU_PACKED;
 169
 170 struct epow_extended_log {
 171     struct rtas_event_log_v6 v6hdr;
 172     struct rtas_event_log_v6_maina maina;
 173     struct rtas_event_log_v6_mainb mainb;
 174     struct rtas_event_log_v6_epow epow;
 175 } QEMU_PACKED;
 176
 177 union drc_identifier {
 178     uint32_t index;
 179     uint32_t count;
 180     struct {
 181         uint32_t count;
 182         uint32_t index;
 183     } count_indexed;
 184     char name[1];
 185 } QEMU_PACKED;
 186
 187 struct rtas_event_log_v6_hp {
 188 #define RTAS_LOG_V6_SECTION_ID_HOTPLUG              0x4850 /* HP */
 189     struct rtas_event_log_v6_section_header hdr;
 190     uint8_t hotplug_type;
 191 #define RTAS_LOG_V6_HP_TYPE_CPU                          1
 192 #define RTAS_LOG_V6_HP_TYPE_MEMORY                       2
 193 #define RTAS_LOG_V6_HP_TYPE_SLOT                         3
 194 #define RTAS_LOG_V6_HP_TYPE_PHB                          4
 195 #define RTAS_LOG_V6_HP_TYPE_PCI                          5
 196     uint8_t hotplug_action;
 197 #define RTAS_LOG_V6_HP_ACTION_ADD                        1
 198 #define RTAS_LOG_V6_HP_ACTION_REMOVE                     2
 199     uint8_t hotplug_identifier;
 200 #define RTAS_LOG_V6_HP_ID_DRC_NAME                       1
 201 #define RTAS_LOG_V6_HP_ID_DRC_INDEX                      2
 202 #define RTAS_LOG_V6_HP_ID_DRC_COUNT                      3
 203 #define RTAS_LOG_V6_HP_ID_DRC_COUNT_INDEXED              4
 204     uint8_t reserved;
 205     union drc_identifier drc_id;
 206 } QEMU_PACKED;
 207
 208 struct hp_extended_log {
 209     struct rtas_event_log_v6 v6hdr;
 210     struct rtas_event_log_v6_maina maina;
 211     struct rtas_event_log_v6_mainb mainb;
 212     struct rtas_event_log_v6_hp hp;
 213 } QEMU_PACKED;
 214
 215 typedef enum EventClass {
 216     EVENT_CLASS_INTERNAL_ERRORS     = 0,
 217     EVENT_CLASS_EPOW                = 1,
 218     EVENT_CLASS_RESERVED            = 2,
 219     EVENT_CLASS_HOT_PLUG            = 3,
 220     EVENT_CLASS_IO                  = 4,
 221     EVENT_CLASS_MAX
 222 } EventClassIndex;
 223 #define EVENT_CLASS_MASK(index) (1 << (31 - index))
 224
 225 static const char * const event_names[EVENT_CLASS_MAX] = {
 226     [EVENT_CLASS_INTERNAL_ERRORS]       = "internal-errors",
 227     [EVENT_CLASS_EPOW]                  = "epow-events",
 228     [EVENT_CLASS_HOT_PLUG]              = "hot-plug-events",
 229     [EVENT_CLASS_IO]                    = "ibm,io-events",
 230 };
 231
 232 struct SpaprEventSource {
 233     int irq;
 234     uint32_t mask;
 235     bool enabled;
 236 };
 237
 238 static SpaprEventSource *spapr_event_sources_new(void)
 239 {
 240     return g_new0(SpaprEventSource, EVENT_CLASS_MAX);
 241 }
 242
 243 static void spapr_event_sources_register(SpaprEventSource *event_sources,
 244                                         EventClassIndex index, int irq)
 245 {
 246     /* we only support 1 irq per event class at the moment */
 247     g_assert(event_sources);
 248     g_assert(!event_sources[index].enabled);
 249     event_sources[index].irq = irq;
 250     event_sources[index].mask = EVENT_CLASS_MASK(index);
 251     event_sources[index].enabled = true;
 252 }
 253
 254 static const SpaprEventSource *
 255 spapr_event_sources_get_source(SpaprEventSource *event_sources,
 256                                EventClassIndex index)
 257 {
 258     g_assert(index < EVENT_CLASS_MAX);
 259     g_assert(event_sources);
 260
 261     return &event_sources[index];
 262 }
 263
 264 void spapr_dt_events(SpaprMachineState *spapr, void *fdt)
 265 {
 266     uint32_t irq_ranges[EVENT_CLASS_MAX * 2];
 267     int i, count = 0, event_sources;
 268     SpaprEventSource *events = spapr->event_sources;
 269
 270     g_assert(events);
 271
 272     _FDT(event_sources = fdt_add_subnode(fdt, 0, "event-sources"));
 273
 274     for (i = 0, count = 0; i < EVENT_CLASS_MAX; i++) {
 275         int node_offset;
 276         uint32_t interrupts[2];
 277         const SpaprEventSource *source =
 278             spapr_event_sources_get_source(events, i);
 279         const char *source_name = event_names[i];
 280
 281         if (!source->enabled) {
 282             continue;
 283         }
 284
 285         spapr_dt_irq(interrupts, source->irq, false);
 286
 287         _FDT(node_offset = fdt_add_subnode(fdt, event_sources, source_name));
 288         _FDT(fdt_setprop(fdt, node_offset, "interrupts", interrupts,
 289                          sizeof(interrupts)));
 290
 291         irq_ranges[count++] = interrupts[0];
 292         irq_ranges[count++] = cpu_to_be32(1);
 293     }
 294
 295     _FDT((fdt_setprop(fdt, event_sources, "interrupt-controller", NULL, 0)));
 296     _FDT((fdt_setprop_cell(fdt, event_sources, "#interrupt-cells", 2)));
 297     _FDT((fdt_setprop(fdt, event_sources, "interrupt-ranges",
 298                       irq_ranges, count * sizeof(uint32_t))));
 299 }
 300
 301 static const SpaprEventSource *
 302 rtas_event_log_to_source(SpaprMachineState *spapr, int log_type)
 303 {
 304     const SpaprEventSource *source;
 305
 306     g_assert(spapr->event_sources);
 307
 308     switch (log_type) {
 309     case RTAS_LOG_TYPE_HOTPLUG:
 310         source = spapr_event_sources_get_source(spapr->event_sources,
 311                                                 EVENT_CLASS_HOT_PLUG);
 312         if (spapr_ovec_test(spapr->ov5_cas, OV5_HP_EVT)) {
 313             g_assert(source->enabled);
 314             break;
 315         }
 316         /* fall back to epow for legacy hotplug interrupt source */
 317     case RTAS_LOG_TYPE_EPOW:
 318         source = spapr_event_sources_get_source(spapr->event_sources,
 319                                                 EVENT_CLASS_EPOW);
 320         break;
 321     default:
 322         source = NULL;
 323     }
 324
 325     return source;
 326 }
 327
 328 static int rtas_event_log_to_irq(SpaprMachineState *spapr, int log_type)
 329 {
 330     const SpaprEventSource *source;
 331
 332     source = rtas_event_log_to_source(spapr, log_type);
 333     g_assert(source);
 334     g_assert(source->enabled);
 335
 336     return source->irq;
 337 }
 338
 339 static uint32_t spapr_event_log_entry_type(SpaprEventLogEntry *entry)
 340 {
 341     return entry->summary & RTAS_LOG_TYPE_MASK;
 342 }
 343
 344 static void rtas_event_log_queue(SpaprMachineState *spapr,
 345                                  SpaprEventLogEntry *entry)
 346 {
 347     QTAILQ_INSERT_TAIL(&spapr->pending_events, entry, next);
 348 }
 349
 350 static SpaprEventLogEntry *rtas_event_log_dequeue(SpaprMachineState *spapr,
 351                                                   uint32_t event_mask)
 352 {
 353     SpaprEventLogEntry *entry = NULL;
 354
 355     QTAILQ_FOREACH(entry, &spapr->pending_events, next) {
 356         const SpaprEventSource *source =
 357             rtas_event_log_to_source(spapr,
 358                                      spapr_event_log_entry_type(entry));
 359
 360         if (source->mask & event_mask) {
 361             break;
 362         }
 363     }
 364
 365     if (entry) {
 366         QTAILQ_REMOVE(&spapr->pending_events, entry, next);
 367     }
 368
 369     return entry;
 370 }
 371
 372 static bool rtas_event_log_contains(uint32_t event_mask)
 373 {
 374     SpaprMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
 375     SpaprEventLogEntry *entry = NULL;
 376
 377     QTAILQ_FOREACH(entry, &spapr->pending_events, next) {
 378         const SpaprEventSource *source =
 379             rtas_event_log_to_source(spapr,
 380                                      spapr_event_log_entry_type(entry));
 381
 382         if (source->mask & event_mask) {
 383             return true;
 384         }
 385     }
 386
 387     return false;
 388 }
 389
 390 static uint32_t next_plid;
 391
 392 static void spapr_init_v6hdr(struct rtas_event_log_v6 *v6hdr)
 393 {
 394     v6hdr->b0 = RTAS_LOG_V6_B0_VALID | RTAS_LOG_V6_B0_NEW_LOG
 395         | RTAS_LOG_V6_B0_BIGENDIAN;
 396     v6hdr->b2 = RTAS_LOG_V6_B2_POWERPC_FORMAT
 397         | RTAS_LOG_V6_B2_LOG_FORMAT_PLATFORM_EVENT;
 398     v6hdr->company = cpu_to_be32(RTAS_LOG_V6_COMPANY_IBM);
 399 }
 400
 401 static void spapr_init_maina(struct rtas_event_log_v6_maina *maina,
 402                              int section_count)
 403 {
 404     SpaprMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
 405     struct tm tm;
 406     int year;
 407
 408     maina->hdr.section_id = cpu_to_be16(RTAS_LOG_V6_SECTION_ID_MAINA);
 409     maina->hdr.section_length = cpu_to_be16(sizeof(*maina));
 410     /* FIXME: section version, subtype and creator id? */
 411     spapr_rtc_read(&spapr->rtc, &tm, NULL);
 412     year = tm.tm_year + 1900;
 413     maina->creation_date = cpu_to_be32((to_bcd(year / 100) << 24)
 414                                        | (to_bcd(year % 100) << 16)
 415                                        | (to_bcd(tm.tm_mon + 1) << 8)
 416                                        | to_bcd(tm.tm_mday));
 417     maina->creation_time = cpu_to_be32((to_bcd(tm.tm_hour) << 24)
 418                                        | (to_bcd(tm.tm_min) << 16)
 419                                        | (to_bcd(tm.tm_sec) << 8));
 420     maina->creator_id = 'H'; /* Hypervisor */
 421     maina->section_count = section_count;
 422     maina->plid = next_plid++;
 423 }
 424
 425 static void spapr_powerdown_req(Notifier *n, void *opaque)
 426 {
 427     SpaprMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
 428     SpaprEventLogEntry *entry;
 429     struct rtas_event_log_v6 *v6hdr;
 430     struct rtas_event_log_v6_maina *maina;
 431     struct rtas_event_log_v6_mainb *mainb;
 432     struct rtas_event_log_v6_epow *epow;
 433     struct epow_extended_log *new_epow;
 434
 435     entry = g_new(SpaprEventLogEntry, 1);
 436     new_epow = g_malloc0(sizeof(*new_epow));
 437     entry->extended_log = new_epow;
 438
 439     v6hdr = &new_epow->v6hdr;
 440     maina = &new_epow->maina;
 441     mainb = &new_epow->mainb;
 442     epow = &new_epow->epow;
 443
 444     entry->summary = RTAS_LOG_VERSION_6
 445                        | RTAS_LOG_SEVERITY_EVENT
 446                        | RTAS_LOG_DISPOSITION_NOT_RECOVERED
 447                        | RTAS_LOG_OPTIONAL_PART_PRESENT
 448                        | RTAS_LOG_TYPE_EPOW;
 449     entry->extended_length = sizeof(*new_epow);
 450
 451     spapr_init_v6hdr(v6hdr);
 452     spapr_init_maina(maina, 3 /* Main-A, Main-B and EPOW */);
 453
 454     mainb->hdr.section_id = cpu_to_be16(RTAS_LOG_V6_SECTION_ID_MAINB);
 455     mainb->hdr.section_length = cpu_to_be16(sizeof(*mainb));
 456     /* FIXME: section version, subtype and creator id? */
 457     mainb->subsystem_id = 0xa0; /* External environment */
 458     mainb->event_severity = 0x00; /* Informational / non-error */
 459     mainb->event_subtype = 0xd0; /* Normal shutdown */
 460
 461     epow->hdr.section_id = cpu_to_be16(RTAS_LOG_V6_SECTION_ID_EPOW);
 462     epow->hdr.section_length = cpu_to_be16(sizeof(*epow));
 463     epow->hdr.section_version = 2; /* includes extended modifier */
 464     /* FIXME: section subtype and creator id? */
 465     epow->sensor_value = RTAS_LOG_V6_EPOW_ACTION_SYSTEM_SHUTDOWN;
 466     epow->event_modifier = RTAS_LOG_V6_EPOW_MODIFIER_NORMAL;
 467     epow->extended_modifier = RTAS_LOG_V6_EPOW_XMODIFIER_PARTITION_SPECIFIC;
 468
 469     rtas_event_log_queue(spapr, entry);
 470
 471     qemu_irq_pulse(spapr_qirq(spapr,
 472                    rtas_event_log_to_irq(spapr, RTAS_LOG_TYPE_EPOW)));
 473 }
 474
 475 static void spapr_hotplug_req_event(uint8_t hp_id, uint8_t hp_action,
 476                                     SpaprDrcType drc_type,
 477                                     union drc_identifier *drc_id)
 478 {
 479     SpaprMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
 480     SpaprEventLogEntry *entry;
 481     struct hp_extended_log *new_hp;
 482     struct rtas_event_log_v6 *v6hdr;
 483     struct rtas_event_log_v6_maina *maina;
 484     struct rtas_event_log_v6_mainb *mainb;
 485     struct rtas_event_log_v6_hp *hp;
 486
 487     entry = g_new(SpaprEventLogEntry, 1);
 488     new_hp = g_malloc0(sizeof(struct hp_extended_log));
 489     entry->extended_log = new_hp;
 490
 491     v6hdr = &new_hp->v6hdr;
 492     maina = &new_hp->maina;
 493     mainb = &new_hp->mainb;
 494     hp = &new_hp->hp;
 495
 496     entry->summary = RTAS_LOG_VERSION_6
 497         | RTAS_LOG_SEVERITY_EVENT
 498         | RTAS_LOG_DISPOSITION_NOT_RECOVERED
 499         | RTAS_LOG_OPTIONAL_PART_PRESENT
 500         | RTAS_LOG_INITIATOR_HOTPLUG
 501         | RTAS_LOG_TYPE_HOTPLUG;
 502     entry->extended_length = sizeof(*new_hp);
 503
 504     spapr_init_v6hdr(v6hdr);
 505     spapr_init_maina(maina, 3 /* Main-A, Main-B, HP */);
 506
 507     mainb->hdr.section_id = cpu_to_be16(RTAS_LOG_V6_SECTION_ID_MAINB);
 508     mainb->hdr.section_length = cpu_to_be16(sizeof(*mainb));
 509     mainb->subsystem_id = 0x80; /* External environment */
 510     mainb->event_severity = 0x00; /* Informational / non-error */
 511     mainb->event_subtype = 0x00; /* Normal shutdown */
 512
 513     hp->hdr.section_id = cpu_to_be16(RTAS_LOG_V6_SECTION_ID_HOTPLUG);
 514     hp->hdr.section_length = cpu_to_be16(sizeof(*hp));
 515     hp->hdr.section_version = 1; /* includes extended modifier */
 516     hp->hotplug_action = hp_action;
 517     hp->hotplug_identifier = hp_id;
 518
 519     switch (drc_type) {
 520     case SPAPR_DR_CONNECTOR_TYPE_PCI:
 521         hp->hotplug_type = RTAS_LOG_V6_HP_TYPE_PCI;
 522         break;
 523     case SPAPR_DR_CONNECTOR_TYPE_LMB:
 524         hp->hotplug_type = RTAS_LOG_V6_HP_TYPE_MEMORY;
 525         break;
 526     case SPAPR_DR_CONNECTOR_TYPE_CPU:
 527         hp->hotplug_type = RTAS_LOG_V6_HP_TYPE_CPU;
 528         break;
 529     case SPAPR_DR_CONNECTOR_TYPE_PHB:
 530         hp->hotplug_type = RTAS_LOG_V6_HP_TYPE_PHB;
 531         break;
 532     default:
 533         /* we shouldn't be signaling hotplug events for resources
 534          * that don't support them
 535          */
 536         g_assert(false);
 537         return;
 538     }
 539
 540     if (hp_id == RTAS_LOG_V6_HP_ID_DRC_COUNT) {
 541         hp->drc_id.count = cpu_to_be32(drc_id->count);
 542     } else if (hp_id == RTAS_LOG_V6_HP_ID_DRC_INDEX) {
 543         hp->drc_id.index = cpu_to_be32(drc_id->index);
 544     } else if (hp_id == RTAS_LOG_V6_HP_ID_DRC_COUNT_INDEXED) {
 545         /* we should not be using count_indexed value unless the guest
 546          * supports dedicated hotplug event source
 547          */
 548         g_assert(spapr_ovec_test(spapr->ov5_cas, OV5_HP_EVT));
 549         hp->drc_id.count_indexed.count =
 550             cpu_to_be32(drc_id->count_indexed.count);
 551         hp->drc_id.count_indexed.index =
 552             cpu_to_be32(drc_id->count_indexed.index);
 553     }
 554
 555     rtas_event_log_queue(spapr, entry);
 556
 557     qemu_irq_pulse(spapr_qirq(spapr,
 558                    rtas_event_log_to_irq(spapr, RTAS_LOG_TYPE_HOTPLUG)));
 559 }
 560
 561 void spapr_hotplug_req_add_by_index(SpaprDrc *drc)
 562 {
 563     SpaprDrcType drc_type = spapr_drc_type(drc);
 564     union drc_identifier drc_id;
 565
 566     drc_id.index = spapr_drc_index(drc);
 567     spapr_hotplug_req_event(RTAS_LOG_V6_HP_ID_DRC_INDEX,
 568                             RTAS_LOG_V6_HP_ACTION_ADD, drc_type, &drc_id);
 569 }
 570
 571 void spapr_hotplug_req_remove_by_index(SpaprDrc *drc)
 572 {
 573     SpaprDrcType drc_type = spapr_drc_type(drc);
 574     union drc_identifier drc_id;
 575
 576     drc_id.index = spapr_drc_index(drc);
 577     spapr_hotplug_req_event(RTAS_LOG_V6_HP_ID_DRC_INDEX,
 578                             RTAS_LOG_V6_HP_ACTION_REMOVE, drc_type, &drc_id);
 579 }
 580
 581 void spapr_hotplug_req_add_by_count(SpaprDrcType drc_type,
 582                                        uint32_t count)
 583 {
 584     union drc_identifier drc_id;
 585
 586     drc_id.count = count;
 587     spapr_hotplug_req_event(RTAS_LOG_V6_HP_ID_DRC_COUNT,
 588                             RTAS_LOG_V6_HP_ACTION_ADD, drc_type, &drc_id);
 589 }
 590
 591 void spapr_hotplug_req_remove_by_count(SpaprDrcType drc_type,
 592                                           uint32_t count)
 593 {
 594     union drc_identifier drc_id;
 595
 596     drc_id.count = count;
 597     spapr_hotplug_req_event(RTAS_LOG_V6_HP_ID_DRC_COUNT,
 598                             RTAS_LOG_V6_HP_ACTION_REMOVE, drc_type, &drc_id);
 599 }
 600
 601 void spapr_hotplug_req_add_by_count_indexed(SpaprDrcType drc_type,
 602                                             uint32_t count, uint32_t index)
 603 {
 604     union drc_identifier drc_id;
 605
 606     drc_id.count_indexed.count = count;
 607     drc_id.count_indexed.index = index;
 608     spapr_hotplug_req_event(RTAS_LOG_V6_HP_ID_DRC_COUNT_INDEXED,
 609                             RTAS_LOG_V6_HP_ACTION_ADD, drc_type, &drc_id);
 610 }
 611
 612 void spapr_hotplug_req_remove_by_count_indexed(SpaprDrcType drc_type,
 613                                                uint32_t count, uint32_t index)
 614 {
 615     union drc_identifier drc_id;
 616
 617     drc_id.count_indexed.count = count;
 618     drc_id.count_indexed.index = index;
 619     spapr_hotplug_req_event(RTAS_LOG_V6_HP_ID_DRC_COUNT_INDEXED,
 620                             RTAS_LOG_V6_HP_ACTION_REMOVE, drc_type, &drc_id);
 621 }
 622
 623 static void check_exception(PowerPCCPU *cpu, SpaprMachineState *spapr,
 624                             uint32_t token, uint32_t nargs,
 625                             target_ulong args,
 626                             uint32_t nret, target_ulong rets)
 627 {
 628     uint32_t mask, buf, len, event_len;
 629     uint64_t xinfo;
 630     SpaprEventLogEntry *event;
 631     struct rtas_error_log header;
 632     int i;
 633
 634     if ((nargs < 6) || (nargs > 7) || nret != 1) {
 635         rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 636         return;
 637     }
 638
 639     xinfo = rtas_ld(args, 1);
 640     mask = rtas_ld(args, 2);
 641     buf = rtas_ld(args, 4);
 642     len = rtas_ld(args, 5);
 643     if (nargs == 7) {
 644         xinfo |= (uint64_t)rtas_ld(args, 6) << 32;
 645     }
 646
 647     event = rtas_event_log_dequeue(spapr, mask);
 648     if (!event) {
 649         goto out_no_events;
 650     }
 651
 652     event_len = event->extended_length + sizeof(header);
 653
 654     if (event_len < len) {
 655         len = event_len;
 656     }
 657
 658     header.summary = cpu_to_be32(event->summary);
 659     header.extended_length = cpu_to_be32(event->extended_length);
 660     cpu_physical_memory_write(buf, &header, sizeof(header));
 661     cpu_physical_memory_write(buf + sizeof(header), event->extended_log,
 662                               event->extended_length);
 663     rtas_st(rets, 0, RTAS_OUT_SUCCESS);
 664     g_free(event->extended_log);
 665     g_free(event);
 666
 667     /* according to PAPR+, the IRQ must be left asserted, or re-asserted, if
 668      * there are still pending events to be fetched via check-exception. We
 669      * do the latter here, since our code relies on edge-triggered
 670      * interrupts.
 671      */
 672     for (i = 0; i < EVENT_CLASS_MAX; i++) {
 673         if (rtas_event_log_contains(EVENT_CLASS_MASK(i))) {
 674             const SpaprEventSource *source =
 675                 spapr_event_sources_get_source(spapr->event_sources, i);
 676
 677             g_assert(source->enabled);
 678             qemu_irq_pulse(spapr_qirq(spapr, source->irq));
 679         }
 680     }
 681
 682     return;
 683
 684 out_no_events:
 685     rtas_st(rets, 0, RTAS_OUT_NO_ERRORS_FOUND);
 686 }
 687
 688 static void event_scan(PowerPCCPU *cpu, SpaprMachineState *spapr,
 689                        uint32_t token, uint32_t nargs,
 690                        target_ulong args,
 691                        uint32_t nret, target_ulong rets)
 692 {
 693     if (nargs != 4 || nret != 1) {
 694         rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 695         return;
 696     }
 697     rtas_st(rets, 0, RTAS_OUT_NO_ERRORS_FOUND);
 698 }
 699
 700 void spapr_clear_pending_events(SpaprMachineState *spapr)
 701 {
 702     SpaprEventLogEntry *entry = NULL, *next_entry;
 703
 704     QTAILQ_FOREACH_SAFE(entry, &spapr->pending_events, next, next_entry) {
 705         QTAILQ_REMOVE(&spapr->pending_events, entry, next);
 706         g_free(entry->extended_log);
 707         g_free(entry);
 708     }
 709 }
 710
 711 void spapr_events_init(SpaprMachineState *spapr)
 712 {
 713     int epow_irq = SPAPR_IRQ_EPOW;
 714
 715     if (SPAPR_MACHINE_GET_CLASS(spapr)->legacy_irq_allocation) {
 716         epow_irq = spapr_irq_findone(spapr, &error_fatal);
 717     }
 718
 719     spapr_irq_claim(spapr, epow_irq, false, &error_fatal);
 720
 721     QTAILQ_INIT(&spapr->pending_events);
 722
 723     spapr->event_sources = spapr_event_sources_new();
 724
 725     spapr_event_sources_register(spapr->event_sources, EVENT_CLASS_EPOW,
 726                                  epow_irq);
 727
 728     /* NOTE: if machine supports modern/dedicated hotplug event source,
 729      * we add it to the device-tree unconditionally. This means we may
 730      * have cases where the source is enabled in QEMU, but unused by the
 731      * guest because it does not support modern hotplug events, so we
 732      * take care to rely on checking for negotiation of OV5_HP_EVT option
 733      * before attempting to use it to signal events, rather than simply
 734      * checking that it's enabled.
 735      */
 736     if (spapr->use_hotplug_event_source) {
 737         int hp_irq = SPAPR_IRQ_HOTPLUG;
 738
 739         if (SPAPR_MACHINE_GET_CLASS(spapr)->legacy_irq_allocation) {
 740             hp_irq = spapr_irq_findone(spapr, &error_fatal);
 741         }
 742
 743         spapr_irq_claim(spapr, hp_irq, false, &error_fatal);
 744
 745         spapr_event_sources_register(spapr->event_sources, EVENT_CLASS_HOT_PLUG,
 746                                      hp_irq);
 747     }
 748
 749     spapr->epow_notifier.notify = spapr_powerdown_req;
 750     qemu_register_powerdown_notifier(&spapr->epow_notifier);
 751     spapr_rtas_register(RTAS_CHECK_EXCEPTION, "check-exception",
 752                         check_exception);
 753     spapr_rtas_register(RTAS_EVENT_SCAN, "event-scan", event_scan);
 754 }