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_xics_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                                     sPAPRDRConnectorType 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     default:
 530         /* we shouldn't be signaling hotplug events for resources
 531          * that don't support them
 532          */
 533         g_assert(false);
 534         return;
 535     }
 536
 537     if (hp_id == RTAS_LOG_V6_HP_ID_DRC_COUNT) {
 538         hp->drc_id.count = cpu_to_be32(drc_id->count);
 539     } else if (hp_id == RTAS_LOG_V6_HP_ID_DRC_INDEX) {
 540         hp->drc_id.index = cpu_to_be32(drc_id->index);
 541     } else if (hp_id == RTAS_LOG_V6_HP_ID_DRC_COUNT_INDEXED) {
 542         /* we should not be using count_indexed value unless the guest
 543          * supports dedicated hotplug event source
 544          */
 545         g_assert(spapr_ovec_test(spapr->ov5_cas, OV5_HP_EVT));
 546         hp->drc_id.count_indexed.count =
 547             cpu_to_be32(drc_id->count_indexed.count);
 548         hp->drc_id.count_indexed.index =
 549             cpu_to_be32(drc_id->count_indexed.index);
 550     }
 551
 552     rtas_event_log_queue(spapr, entry);
 553
 554     qemu_irq_pulse(spapr_qirq(spapr,
 555                    rtas_event_log_to_irq(spapr, RTAS_LOG_TYPE_HOTPLUG)));
 556 }
 557
 558 void spapr_hotplug_req_add_by_index(sPAPRDRConnector *drc)
 559 {
 560     sPAPRDRConnectorType drc_type = spapr_drc_type(drc);
 561     union drc_identifier drc_id;
 562
 563     drc_id.index = spapr_drc_index(drc);
 564     spapr_hotplug_req_event(RTAS_LOG_V6_HP_ID_DRC_INDEX,
 565                             RTAS_LOG_V6_HP_ACTION_ADD, drc_type, &drc_id);
 566 }
 567
 568 void spapr_hotplug_req_remove_by_index(sPAPRDRConnector *drc)
 569 {
 570     sPAPRDRConnectorType drc_type = spapr_drc_type(drc);
 571     union drc_identifier drc_id;
 572
 573     drc_id.index = spapr_drc_index(drc);
 574     spapr_hotplug_req_event(RTAS_LOG_V6_HP_ID_DRC_INDEX,
 575                             RTAS_LOG_V6_HP_ACTION_REMOVE, drc_type, &drc_id);
 576 }
 577
 578 void spapr_hotplug_req_add_by_count(sPAPRDRConnectorType drc_type,
 579                                        uint32_t count)
 580 {
 581     union drc_identifier drc_id;
 582
 583     drc_id.count = count;
 584     spapr_hotplug_req_event(RTAS_LOG_V6_HP_ID_DRC_COUNT,
 585                             RTAS_LOG_V6_HP_ACTION_ADD, drc_type, &drc_id);
 586 }
 587
 588 void spapr_hotplug_req_remove_by_count(sPAPRDRConnectorType drc_type,
 589                                           uint32_t count)
 590 {
 591     union drc_identifier drc_id;
 592
 593     drc_id.count = count;
 594     spapr_hotplug_req_event(RTAS_LOG_V6_HP_ID_DRC_COUNT,
 595                             RTAS_LOG_V6_HP_ACTION_REMOVE, drc_type, &drc_id);
 596 }
 597
 598 void spapr_hotplug_req_add_by_count_indexed(sPAPRDRConnectorType drc_type,
 599                                             uint32_t count, uint32_t index)
 600 {
 601     union drc_identifier drc_id;
 602
 603     drc_id.count_indexed.count = count;
 604     drc_id.count_indexed.index = index;
 605     spapr_hotplug_req_event(RTAS_LOG_V6_HP_ID_DRC_COUNT_INDEXED,
 606                             RTAS_LOG_V6_HP_ACTION_ADD, drc_type, &drc_id);
 607 }
 608
 609 void spapr_hotplug_req_remove_by_count_indexed(sPAPRDRConnectorType drc_type,
 610                                                uint32_t count, uint32_t index)
 611 {
 612     union drc_identifier drc_id;
 613
 614     drc_id.count_indexed.count = count;
 615     drc_id.count_indexed.index = index;
 616     spapr_hotplug_req_event(RTAS_LOG_V6_HP_ID_DRC_COUNT_INDEXED,
 617                             RTAS_LOG_V6_HP_ACTION_REMOVE, drc_type, &drc_id);
 618 }
 619
 620 static void check_exception(PowerPCCPU *cpu, sPAPRMachineState *spapr,
 621                             uint32_t token, uint32_t nargs,
 622                             target_ulong args,
 623                             uint32_t nret, target_ulong rets)
 624 {
 625     uint32_t mask, buf, len, event_len;
 626     uint64_t xinfo;
 627     sPAPREventLogEntry *event;
 628     struct rtas_error_log header;
 629     int i;
 630
 631     if ((nargs < 6) || (nargs > 7) || nret != 1) {
 632         rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 633         return;
 634     }
 635
 636     xinfo = rtas_ld(args, 1);
 637     mask = rtas_ld(args, 2);
 638     buf = rtas_ld(args, 4);
 639     len = rtas_ld(args, 5);
 640     if (nargs == 7) {
 641         xinfo |= (uint64_t)rtas_ld(args, 6) << 32;
 642     }
 643
 644     event = rtas_event_log_dequeue(spapr, mask);
 645     if (!event) {
 646         goto out_no_events;
 647     }
 648
 649     event_len = event->extended_length + sizeof(header);
 650
 651     if (event_len < len) {
 652         len = event_len;
 653     }
 654
 655     header.summary = cpu_to_be32(event->summary);
 656     header.extended_length = cpu_to_be32(event->extended_length);
 657     cpu_physical_memory_write(buf, &header, sizeof(header));
 658     cpu_physical_memory_write(buf + sizeof(header), event->extended_log,
 659                               event->extended_length);
 660     rtas_st(rets, 0, RTAS_OUT_SUCCESS);
 661     g_free(event->extended_log);
 662     g_free(event);
 663
 664     /* according to PAPR+, the IRQ must be left asserted, or re-asserted, if
 665      * there are still pending events to be fetched via check-exception. We
 666      * do the latter here, since our code relies on edge-triggered
 667      * interrupts.
 668      */
 669     for (i = 0; i < EVENT_CLASS_MAX; i++) {
 670         if (rtas_event_log_contains(EVENT_CLASS_MASK(i))) {
 671             const sPAPREventSource *source =
 672                 spapr_event_sources_get_source(spapr->event_sources, i);
 673
 674             g_assert(source->enabled);
 675             qemu_irq_pulse(spapr_qirq(spapr, source->irq));
 676         }
 677     }
 678
 679     return;
 680
 681 out_no_events:
 682     rtas_st(rets, 0, RTAS_OUT_NO_ERRORS_FOUND);
 683 }
 684
 685 static void event_scan(PowerPCCPU *cpu, sPAPRMachineState *spapr,
 686                        uint32_t token, uint32_t nargs,
 687                        target_ulong args,
 688                        uint32_t nret, target_ulong rets)
 689 {
 690     if (nargs != 4 || nret != 1) {
 691         rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 692         return;
 693     }
 694     rtas_st(rets, 0, RTAS_OUT_NO_ERRORS_FOUND);
 695 }
 696
 697 void spapr_clear_pending_events(sPAPRMachineState *spapr)
 698 {
 699     sPAPREventLogEntry *entry = NULL, *next_entry;
 700
 701     QTAILQ_FOREACH_SAFE(entry, &spapr->pending_events, next, next_entry) {
 702         QTAILQ_REMOVE(&spapr->pending_events, entry, next);
 703         g_free(entry->extended_log);
 704         g_free(entry);
 705     }
 706 }
 707
 708 void spapr_events_init(sPAPRMachineState *spapr)
 709 {
 710     int epow_irq;
 711
 712     epow_irq = spapr_irq_findone(spapr, &error_fatal);
 713
 714     spapr_irq_claim(spapr, epow_irq, false, &error_fatal);
 715
 716     QTAILQ_INIT(&spapr->pending_events);
 717
 718     spapr->event_sources = spapr_event_sources_new();
 719
 720     spapr_event_sources_register(spapr->event_sources, EVENT_CLASS_EPOW,
 721                                  epow_irq);
 722
 723     /* NOTE: if machine supports modern/dedicated hotplug event source,
 724      * we add it to the device-tree unconditionally. This means we may
 725      * have cases where the source is enabled in QEMU, but unused by the
 726      * guest because it does not support modern hotplug events, so we
 727      * take care to rely on checking for negotiation of OV5_HP_EVT option
 728      * before attempting to use it to signal events, rather than simply
 729      * checking that it's enabled.
 730      */
 731     if (spapr->use_hotplug_event_source) {
 732         int hp_irq;
 733
 734         hp_irq = spapr_irq_findone(spapr, &error_fatal);
 735
 736         spapr_irq_claim(spapr, hp_irq, false, &error_fatal);
 737
 738         spapr_event_sources_register(spapr->event_sources, EVENT_CLASS_HOT_PLUG,
 739                                      hp_irq);
 740     }
 741
 742     spapr->epow_notifier.notify = spapr_powerdown_req;
 743     qemu_register_powerdown_notifier(&spapr->epow_notifier);
 744     spapr_rtas_register(RTAS_CHECK_EXCEPTION, "check-exception",
 745                         check_exception);
 746     spapr_rtas_register(RTAS_EVENT_SCAN, "event-scan", event_scan);
 747 }