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 "sysemu/char.h"
  32 #include "hw/qdev.h"
  33 #include "sysemu/device_tree.h"
  34
  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 <libfdt.h>
  43
  44 struct rtas_error_log {
  45     uint32_t summary;
  46 #define RTAS_LOG_VERSION_MASK                   0xff000000
  47 #define   RTAS_LOG_VERSION_6                    0x06000000
  48 #define RTAS_LOG_SEVERITY_MASK                  0x00e00000
  49 #define   RTAS_LOG_SEVERITY_ALREADY_REPORTED    0x00c00000
  50 #define   RTAS_LOG_SEVERITY_FATAL               0x00a00000
  51 #define   RTAS_LOG_SEVERITY_ERROR               0x00800000
  52 #define   RTAS_LOG_SEVERITY_ERROR_SYNC          0x00600000
  53 #define   RTAS_LOG_SEVERITY_WARNING             0x00400000
  54 #define   RTAS_LOG_SEVERITY_EVENT               0x00200000
  55 #define   RTAS_LOG_SEVERITY_NO_ERROR            0x00000000
  56 #define RTAS_LOG_DISPOSITION_MASK               0x00180000
  57 #define   RTAS_LOG_DISPOSITION_FULLY_RECOVERED  0x00000000
  58 #define   RTAS_LOG_DISPOSITION_LIMITED_RECOVERY 0x00080000
  59 #define   RTAS_LOG_DISPOSITION_NOT_RECOVERED    0x00100000
  60 #define RTAS_LOG_OPTIONAL_PART_PRESENT          0x00040000
  61 #define RTAS_LOG_INITIATOR_MASK                 0x0000f000
  62 #define   RTAS_LOG_INITIATOR_UNKNOWN            0x00000000
  63 #define   RTAS_LOG_INITIATOR_CPU                0x00001000
  64 #define   RTAS_LOG_INITIATOR_PCI                0x00002000
  65 #define   RTAS_LOG_INITIATOR_MEMORY             0x00004000
  66 #define   RTAS_LOG_INITIATOR_HOTPLUG            0x00006000
  67 #define RTAS_LOG_TARGET_MASK                    0x00000f00
  68 #define   RTAS_LOG_TARGET_UNKNOWN               0x00000000
  69 #define   RTAS_LOG_TARGET_CPU                   0x00000100
  70 #define   RTAS_LOG_TARGET_PCI                   0x00000200
  71 #define   RTAS_LOG_TARGET_MEMORY                0x00000400
  72 #define   RTAS_LOG_TARGET_HOTPLUG               0x00000600
  73 #define RTAS_LOG_TYPE_MASK                      0x000000ff
  74 #define   RTAS_LOG_TYPE_OTHER                   0x00000000
  75 #define   RTAS_LOG_TYPE_RETRY                   0x00000001
  76 #define   RTAS_LOG_TYPE_TCE_ERR                 0x00000002
  77 #define   RTAS_LOG_TYPE_INTERN_DEV_FAIL         0x00000003
  78 #define   RTAS_LOG_TYPE_TIMEOUT                 0x00000004
  79 #define   RTAS_LOG_TYPE_DATA_PARITY             0x00000005
  80 #define   RTAS_LOG_TYPE_ADDR_PARITY             0x00000006
  81 #define   RTAS_LOG_TYPE_CACHE_PARITY            0x00000007
  82 #define   RTAS_LOG_TYPE_ADDR_INVALID            0x00000008
  83 #define   RTAS_LOG_TYPE_ECC_UNCORR              0x00000009
  84 #define   RTAS_LOG_TYPE_ECC_CORR                0x0000000a
  85 #define   RTAS_LOG_TYPE_EPOW                    0x00000040
  86 #define   RTAS_LOG_TYPE_HOTPLUG                 0x000000e5
  87     uint32_t extended_length;
  88 } QEMU_PACKED;
  89
  90 struct rtas_event_log_v6 {
  91     uint8_t b0;
  92 #define RTAS_LOG_V6_B0_VALID                          0x80
  93 #define RTAS_LOG_V6_B0_UNRECOVERABLE_ERROR            0x40
  94 #define RTAS_LOG_V6_B0_RECOVERABLE_ERROR              0x20
  95 #define RTAS_LOG_V6_B0_DEGRADED_OPERATION             0x10
  96 #define RTAS_LOG_V6_B0_PREDICTIVE_ERROR               0x08
  97 #define RTAS_LOG_V6_B0_NEW_LOG                        0x04
  98 #define RTAS_LOG_V6_B0_BIGENDIAN                      0x02
  99     uint8_t _resv1;
 100     uint8_t b2;
 101 #define RTAS_LOG_V6_B2_POWERPC_FORMAT                 0x80
 102 #define RTAS_LOG_V6_B2_LOG_FORMAT_MASK                0x0f
 103 #define   RTAS_LOG_V6_B2_LOG_FORMAT_PLATFORM_EVENT    0x0e
 104     uint8_t _resv2[9];
 105     uint32_t company;
 106 #define RTAS_LOG_V6_COMPANY_IBM                 0x49424d00 /* IBM<null> */
 107 } QEMU_PACKED;
 108
 109 struct rtas_event_log_v6_section_header {
 110     uint16_t section_id;
 111     uint16_t section_length;
 112     uint8_t section_version;
 113     uint8_t section_subtype;
 114     uint16_t creator_component_id;
 115 } QEMU_PACKED;
 116
 117 struct rtas_event_log_v6_maina {
 118 #define RTAS_LOG_V6_SECTION_ID_MAINA                0x5048 /* PH */
 119     struct rtas_event_log_v6_section_header hdr;
 120     uint32_t creation_date; /* BCD: YYYYMMDD */
 121     uint32_t creation_time; /* BCD: HHMMSS00 */
 122     uint8_t _platform1[8];
 123     char creator_id;
 124     uint8_t _resv1[2];
 125     uint8_t section_count;
 126     uint8_t _resv2[4];
 127     uint8_t _platform2[8];
 128     uint32_t plid;
 129     uint8_t _platform3[4];
 130 } QEMU_PACKED;
 131
 132 struct rtas_event_log_v6_mainb {
 133 #define RTAS_LOG_V6_SECTION_ID_MAINB                0x5548 /* UH */
 134     struct rtas_event_log_v6_section_header hdr;
 135     uint8_t subsystem_id;
 136     uint8_t _platform1;
 137     uint8_t event_severity;
 138     uint8_t event_subtype;
 139     uint8_t _platform2[4];
 140     uint8_t _resv1[2];
 141     uint16_t action_flags;
 142     uint8_t _resv2[4];
 143 } QEMU_PACKED;
 144
 145 struct rtas_event_log_v6_epow {
 146 #define RTAS_LOG_V6_SECTION_ID_EPOW                 0x4550 /* EP */
 147     struct rtas_event_log_v6_section_header hdr;
 148     uint8_t sensor_value;
 149 #define RTAS_LOG_V6_EPOW_ACTION_RESET                    0
 150 #define RTAS_LOG_V6_EPOW_ACTION_WARN_COOLING             1
 151 #define RTAS_LOG_V6_EPOW_ACTION_WARN_POWER               2
 152 #define RTAS_LOG_V6_EPOW_ACTION_SYSTEM_SHUTDOWN          3
 153 #define RTAS_LOG_V6_EPOW_ACTION_SYSTEM_HALT              4
 154 #define RTAS_LOG_V6_EPOW_ACTION_MAIN_ENCLOSURE           5
 155 #define RTAS_LOG_V6_EPOW_ACTION_POWER_OFF                7
 156     uint8_t event_modifier;
 157 #define RTAS_LOG_V6_EPOW_MODIFIER_NORMAL                 1
 158 #define RTAS_LOG_V6_EPOW_MODIFIER_ON_UPS                 2
 159 #define RTAS_LOG_V6_EPOW_MODIFIER_CRITICAL               3
 160 #define RTAS_LOG_V6_EPOW_MODIFIER_TEMPERATURE            4
 161     uint8_t extended_modifier;
 162 #define RTAS_LOG_V6_EPOW_XMODIFIER_SYSTEM_WIDE           0
 163 #define RTAS_LOG_V6_EPOW_XMODIFIER_PARTITION_SPECIFIC    1
 164     uint8_t _resv;
 165     uint64_t reason_code;
 166 } QEMU_PACKED;
 167
 168 struct epow_log_full {
 169     struct rtas_error_log hdr;
 170     struct rtas_event_log_v6 v6hdr;
 171     struct rtas_event_log_v6_maina maina;
 172     struct rtas_event_log_v6_mainb mainb;
 173     struct rtas_event_log_v6_epow epow;
 174 } QEMU_PACKED;
 175
 176 struct rtas_event_log_v6_hp {
 177 #define RTAS_LOG_V6_SECTION_ID_HOTPLUG              0x4850 /* HP */
 178     struct rtas_event_log_v6_section_header hdr;
 179     uint8_t hotplug_type;
 180 #define RTAS_LOG_V6_HP_TYPE_CPU                          1
 181 #define RTAS_LOG_V6_HP_TYPE_MEMORY                       2
 182 #define RTAS_LOG_V6_HP_TYPE_SLOT                         3
 183 #define RTAS_LOG_V6_HP_TYPE_PHB                          4
 184 #define RTAS_LOG_V6_HP_TYPE_PCI                          5
 185     uint8_t hotplug_action;
 186 #define RTAS_LOG_V6_HP_ACTION_ADD                        1
 187 #define RTAS_LOG_V6_HP_ACTION_REMOVE                     2
 188     uint8_t hotplug_identifier;
 189 #define RTAS_LOG_V6_HP_ID_DRC_NAME                       1
 190 #define RTAS_LOG_V6_HP_ID_DRC_INDEX                      2
 191 #define RTAS_LOG_V6_HP_ID_DRC_COUNT                      3
 192     uint8_t reserved;
 193     union {
 194         uint32_t index;
 195         uint32_t count;
 196         char name[1];
 197     } drc;
 198 } QEMU_PACKED;
 199
 200 struct hp_log_full {
 201     struct rtas_error_log hdr;
 202     struct rtas_event_log_v6 v6hdr;
 203     struct rtas_event_log_v6_maina maina;
 204     struct rtas_event_log_v6_mainb mainb;
 205     struct rtas_event_log_v6_hp hp;
 206 } QEMU_PACKED;
 207
 208 #define EVENT_MASK_INTERNAL_ERRORS           0x80000000
 209 #define EVENT_MASK_EPOW                      0x40000000
 210 #define EVENT_MASK_HOTPLUG                   0x10000000
 211 #define EVENT_MASK_IO                        0x08000000
 212
 213 #define _FDT(exp) \
 214     do { \
 215         int ret = (exp);                                           \
 216         if (ret < 0) {                                             \
 217             fprintf(stderr, "qemu: error creating device tree: %s: %s\n", \
 218                     #exp, fdt_strerror(ret));                      \
 219             exit(1);                                               \
 220         }                                                          \
 221     } while (0)
 222
 223 void spapr_events_fdt_skel(void *fdt, uint32_t check_exception_irq)
 224 {
 225     uint32_t irq_ranges[] = {cpu_to_be32(check_exception_irq), cpu_to_be32(1)};
 226     uint32_t interrupts[] = {cpu_to_be32(check_exception_irq), 0};
 227
 228     _FDT((fdt_begin_node(fdt, "event-sources")));
 229
 230     _FDT((fdt_property(fdt, "interrupt-controller", NULL, 0)));
 231     _FDT((fdt_property_cell(fdt, "#interrupt-cells", 2)));
 232     _FDT((fdt_property(fdt, "interrupt-ranges",
 233                        irq_ranges, sizeof(irq_ranges))));
 234
 235     _FDT((fdt_begin_node(fdt, "epow-events")));
 236     _FDT((fdt_property(fdt, "interrupts", interrupts, sizeof(interrupts))));
 237     _FDT((fdt_end_node(fdt)));
 238
 239     _FDT((fdt_end_node(fdt)));
 240 }
 241
 242 static void rtas_event_log_queue(int log_type, void *data, bool exception)
 243 {
 244     sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
 245     sPAPREventLogEntry *entry = g_new(sPAPREventLogEntry, 1);
 246
 247     g_assert(data);
 248     entry->log_type = log_type;
 249     entry->exception = exception;
 250     entry->data = data;
 251     QTAILQ_INSERT_TAIL(&spapr->pending_events, entry, next);
 252 }
 253
 254 static sPAPREventLogEntry *rtas_event_log_dequeue(uint32_t event_mask,
 255                                                   bool exception)
 256 {
 257     sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
 258     sPAPREventLogEntry *entry = NULL;
 259
 260     /* we only queue EPOW events atm. */
 261     if ((event_mask & EVENT_MASK_EPOW) == 0) {
 262         return NULL;
 263     }
 264
 265     QTAILQ_FOREACH(entry, &spapr->pending_events, next) {
 266         if (entry->exception != exception) {
 267             continue;
 268         }
 269
 270         /* EPOW and hotplug events are surfaced in the same manner */
 271         if (entry->log_type == RTAS_LOG_TYPE_EPOW ||
 272             entry->log_type == RTAS_LOG_TYPE_HOTPLUG) {
 273             break;
 274         }
 275     }
 276
 277     if (entry) {
 278         QTAILQ_REMOVE(&spapr->pending_events, entry, next);
 279     }
 280
 281     return entry;
 282 }
 283
 284 static bool rtas_event_log_contains(uint32_t event_mask, bool exception)
 285 {
 286     sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
 287     sPAPREventLogEntry *entry = NULL;
 288
 289     /* we only queue EPOW events atm. */
 290     if ((event_mask & EVENT_MASK_EPOW) == 0) {
 291         return false;
 292     }
 293
 294     QTAILQ_FOREACH(entry, &spapr->pending_events, next) {
 295         if (entry->exception != exception) {
 296             continue;
 297         }
 298
 299         /* EPOW and hotplug events are surfaced in the same manner */
 300         if (entry->log_type == RTAS_LOG_TYPE_EPOW ||
 301             entry->log_type == RTAS_LOG_TYPE_HOTPLUG) {
 302             return true;
 303         }
 304     }
 305
 306     return false;
 307 }
 308
 309 static uint32_t next_plid;
 310
 311 static void spapr_init_v6hdr(struct rtas_event_log_v6 *v6hdr)
 312 {
 313     v6hdr->b0 = RTAS_LOG_V6_B0_VALID | RTAS_LOG_V6_B0_NEW_LOG
 314         | RTAS_LOG_V6_B0_BIGENDIAN;
 315     v6hdr->b2 = RTAS_LOG_V6_B2_POWERPC_FORMAT
 316         | RTAS_LOG_V6_B2_LOG_FORMAT_PLATFORM_EVENT;
 317     v6hdr->company = cpu_to_be32(RTAS_LOG_V6_COMPANY_IBM);
 318 }
 319
 320 static void spapr_init_maina(struct rtas_event_log_v6_maina *maina,
 321                              int section_count)
 322 {
 323     sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
 324     struct tm tm;
 325     int year;
 326
 327     maina->hdr.section_id = cpu_to_be16(RTAS_LOG_V6_SECTION_ID_MAINA);
 328     maina->hdr.section_length = cpu_to_be16(sizeof(*maina));
 329     /* FIXME: section version, subtype and creator id? */
 330     spapr_rtc_read(spapr->rtc, &tm, NULL);
 331     year = tm.tm_year + 1900;
 332     maina->creation_date = cpu_to_be32((to_bcd(year / 100) << 24)
 333                                        | (to_bcd(year % 100) << 16)
 334                                        | (to_bcd(tm.tm_mon + 1) << 8)
 335                                        | to_bcd(tm.tm_mday));
 336     maina->creation_time = cpu_to_be32((to_bcd(tm.tm_hour) << 24)
 337                                        | (to_bcd(tm.tm_min) << 16)
 338                                        | (to_bcd(tm.tm_sec) << 8));
 339     maina->creator_id = 'H'; /* Hypervisor */
 340     maina->section_count = section_count;
 341     maina->plid = next_plid++;
 342 }
 343
 344 static void spapr_powerdown_req(Notifier *n, void *opaque)
 345 {
 346     sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
 347     struct rtas_error_log *hdr;
 348     struct rtas_event_log_v6 *v6hdr;
 349     struct rtas_event_log_v6_maina *maina;
 350     struct rtas_event_log_v6_mainb *mainb;
 351     struct rtas_event_log_v6_epow *epow;
 352     struct epow_log_full *new_epow;
 353
 354     new_epow = g_malloc0(sizeof(*new_epow));
 355     hdr = &new_epow->hdr;
 356     v6hdr = &new_epow->v6hdr;
 357     maina = &new_epow->maina;
 358     mainb = &new_epow->mainb;
 359     epow = &new_epow->epow;
 360
 361     hdr->summary = cpu_to_be32(RTAS_LOG_VERSION_6
 362                                | RTAS_LOG_SEVERITY_EVENT
 363                                | RTAS_LOG_DISPOSITION_NOT_RECOVERED
 364                                | RTAS_LOG_OPTIONAL_PART_PRESENT
 365                                | RTAS_LOG_TYPE_EPOW);
 366     hdr->extended_length = cpu_to_be32(sizeof(*new_epow)
 367                                        - sizeof(new_epow->hdr));
 368
 369     spapr_init_v6hdr(v6hdr);
 370     spapr_init_maina(maina, 3 /* Main-A, Main-B and EPOW */);
 371
 372     mainb->hdr.section_id = cpu_to_be16(RTAS_LOG_V6_SECTION_ID_MAINB);
 373     mainb->hdr.section_length = cpu_to_be16(sizeof(*mainb));
 374     /* FIXME: section version, subtype and creator id? */
 375     mainb->subsystem_id = 0xa0; /* External environment */
 376     mainb->event_severity = 0x00; /* Informational / non-error */
 377     mainb->event_subtype = 0xd0; /* Normal shutdown */
 378
 379     epow->hdr.section_id = cpu_to_be16(RTAS_LOG_V6_SECTION_ID_EPOW);
 380     epow->hdr.section_length = cpu_to_be16(sizeof(*epow));
 381     epow->hdr.section_version = 2; /* includes extended modifier */
 382     /* FIXME: section subtype and creator id? */
 383     epow->sensor_value = RTAS_LOG_V6_EPOW_ACTION_SYSTEM_SHUTDOWN;
 384     epow->event_modifier = RTAS_LOG_V6_EPOW_MODIFIER_NORMAL;
 385     epow->extended_modifier = RTAS_LOG_V6_EPOW_XMODIFIER_PARTITION_SPECIFIC;
 386
 387     rtas_event_log_queue(RTAS_LOG_TYPE_EPOW, new_epow, true);
 388
 389     qemu_irq_pulse(xics_get_qirq(spapr->icp, spapr->check_exception_irq));
 390 }
 391
 392 static void spapr_hotplug_set_signalled(uint32_t drc_index)
 393 {
 394     sPAPRDRConnector *drc = spapr_dr_connector_by_index(drc_index);
 395     sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
 396     drck->set_signalled(drc);
 397 }
 398
 399 static void spapr_hotplug_req_event(uint8_t hp_id, uint8_t hp_action,
 400                                     sPAPRDRConnectorType drc_type,
 401                                     uint32_t drc)
 402 {
 403     sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
 404     struct hp_log_full *new_hp;
 405     struct rtas_error_log *hdr;
 406     struct rtas_event_log_v6 *v6hdr;
 407     struct rtas_event_log_v6_maina *maina;
 408     struct rtas_event_log_v6_mainb *mainb;
 409     struct rtas_event_log_v6_hp *hp;
 410
 411     new_hp = g_malloc0(sizeof(struct hp_log_full));
 412     hdr = &new_hp->hdr;
 413     v6hdr = &new_hp->v6hdr;
 414     maina = &new_hp->maina;
 415     mainb = &new_hp->mainb;
 416     hp = &new_hp->hp;
 417
 418     hdr->summary = cpu_to_be32(RTAS_LOG_VERSION_6
 419                                | RTAS_LOG_SEVERITY_EVENT
 420                                | RTAS_LOG_DISPOSITION_NOT_RECOVERED
 421                                | RTAS_LOG_OPTIONAL_PART_PRESENT
 422                                | RTAS_LOG_INITIATOR_HOTPLUG
 423                                | RTAS_LOG_TYPE_HOTPLUG);
 424     hdr->extended_length = cpu_to_be32(sizeof(*new_hp)
 425                                        - sizeof(new_hp->hdr));
 426
 427     spapr_init_v6hdr(v6hdr);
 428     spapr_init_maina(maina, 3 /* Main-A, Main-B, HP */);
 429
 430     mainb->hdr.section_id = cpu_to_be16(RTAS_LOG_V6_SECTION_ID_MAINB);
 431     mainb->hdr.section_length = cpu_to_be16(sizeof(*mainb));
 432     mainb->subsystem_id = 0x80; /* External environment */
 433     mainb->event_severity = 0x00; /* Informational / non-error */
 434     mainb->event_subtype = 0x00; /* Normal shutdown */
 435
 436     hp->hdr.section_id = cpu_to_be16(RTAS_LOG_V6_SECTION_ID_HOTPLUG);
 437     hp->hdr.section_length = cpu_to_be16(sizeof(*hp));
 438     hp->hdr.section_version = 1; /* includes extended modifier */
 439     hp->hotplug_action = hp_action;
 440     hp->hotplug_identifier = hp_id;
 441
 442     switch (drc_type) {
 443     case SPAPR_DR_CONNECTOR_TYPE_PCI:
 444         hp->hotplug_type = RTAS_LOG_V6_HP_TYPE_PCI;
 445         if (hp->hotplug_action == RTAS_LOG_V6_HP_ACTION_ADD) {
 446             spapr_hotplug_set_signalled(drc);
 447         }
 448         break;
 449     case SPAPR_DR_CONNECTOR_TYPE_LMB:
 450         hp->hotplug_type = RTAS_LOG_V6_HP_TYPE_MEMORY;
 451         break;
 452     default:
 453         /* we shouldn't be signaling hotplug events for resources
 454          * that don't support them
 455          */
 456         g_assert(false);
 457         return;
 458     }
 459
 460     if (hp_id == RTAS_LOG_V6_HP_ID_DRC_COUNT) {
 461         hp->drc.count = cpu_to_be32(drc);
 462     } else if (hp_id == RTAS_LOG_V6_HP_ID_DRC_INDEX) {
 463         hp->drc.index = cpu_to_be32(drc);
 464     }
 465
 466     rtas_event_log_queue(RTAS_LOG_TYPE_HOTPLUG, new_hp, true);
 467
 468     qemu_irq_pulse(xics_get_qirq(spapr->icp, spapr->check_exception_irq));
 469 }
 470
 471 void spapr_hotplug_req_add_by_index(sPAPRDRConnector *drc)
 472 {
 473     sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
 474     sPAPRDRConnectorType drc_type = drck->get_type(drc);
 475     uint32_t index = drck->get_index(drc);
 476
 477     spapr_hotplug_req_event(RTAS_LOG_V6_HP_ID_DRC_INDEX,
 478                             RTAS_LOG_V6_HP_ACTION_ADD, drc_type, index);
 479 }
 480
 481 void spapr_hotplug_req_remove_by_index(sPAPRDRConnector *drc)
 482 {
 483     sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
 484     sPAPRDRConnectorType drc_type = drck->get_type(drc);
 485     uint32_t index = drck->get_index(drc);
 486
 487     spapr_hotplug_req_event(RTAS_LOG_V6_HP_ID_DRC_INDEX,
 488                             RTAS_LOG_V6_HP_ACTION_REMOVE, drc_type, index);
 489 }
 490
 491 void spapr_hotplug_req_add_by_count(sPAPRDRConnectorType drc_type,
 492                                        uint32_t count)
 493 {
 494     spapr_hotplug_req_event(RTAS_LOG_V6_HP_ID_DRC_COUNT,
 495                             RTAS_LOG_V6_HP_ACTION_ADD, drc_type, count);
 496 }
 497
 498 void spapr_hotplug_req_remove_by_count(sPAPRDRConnectorType drc_type,
 499                                           uint32_t count)
 500 {
 501     spapr_hotplug_req_event(RTAS_LOG_V6_HP_ID_DRC_COUNT,
 502                             RTAS_LOG_V6_HP_ACTION_REMOVE, drc_type, count);
 503 }
 504
 505 static void check_exception(PowerPCCPU *cpu, sPAPRMachineState *spapr,
 506                             uint32_t token, uint32_t nargs,
 507                             target_ulong args,
 508                             uint32_t nret, target_ulong rets)
 509 {
 510     uint32_t mask, buf, len, event_len;
 511     uint64_t xinfo;
 512     sPAPREventLogEntry *event;
 513     struct rtas_error_log *hdr;
 514
 515     if ((nargs < 6) || (nargs > 7) || nret != 1) {
 516         rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 517         return;
 518     }
 519
 520     xinfo = rtas_ld(args, 1);
 521     mask = rtas_ld(args, 2);
 522     buf = rtas_ld(args, 4);
 523     len = rtas_ld(args, 5);
 524     if (nargs == 7) {
 525         xinfo |= (uint64_t)rtas_ld(args, 6) << 32;
 526     }
 527
 528     event = rtas_event_log_dequeue(mask, true);
 529     if (!event) {
 530         goto out_no_events;
 531     }
 532
 533     hdr = event->data;
 534     event_len = be32_to_cpu(hdr->extended_length) + sizeof(*hdr);
 535
 536     if (event_len < len) {
 537         len = event_len;
 538     }
 539
 540     cpu_physical_memory_write(buf, event->data, len);
 541     rtas_st(rets, 0, RTAS_OUT_SUCCESS);
 542     g_free(event->data);
 543     g_free(event);
 544
 545     /* according to PAPR+, the IRQ must be left asserted, or re-asserted, if
 546      * there are still pending events to be fetched via check-exception. We
 547      * do the latter here, since our code relies on edge-triggered
 548      * interrupts.
 549      */
 550     if (rtas_event_log_contains(mask, true)) {
 551         qemu_irq_pulse(xics_get_qirq(spapr->icp, spapr->check_exception_irq));
 552     }
 553
 554     return;
 555
 556 out_no_events:
 557     rtas_st(rets, 0, RTAS_OUT_NO_ERRORS_FOUND);
 558 }
 559
 560 static void event_scan(PowerPCCPU *cpu, sPAPRMachineState *spapr,
 561                        uint32_t token, uint32_t nargs,
 562                        target_ulong args,
 563                        uint32_t nret, target_ulong rets)
 564 {
 565     uint32_t mask, buf, len, event_len;
 566     sPAPREventLogEntry *event;
 567     struct rtas_error_log *hdr;
 568
 569     if (nargs != 4 || nret != 1) {
 570         rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 571         return;
 572     }
 573
 574     mask = rtas_ld(args, 0);
 575     buf = rtas_ld(args, 2);
 576     len = rtas_ld(args, 3);
 577
 578     event = rtas_event_log_dequeue(mask, false);
 579     if (!event) {
 580         goto out_no_events;
 581     }
 582
 583     hdr = event->data;
 584     event_len = be32_to_cpu(hdr->extended_length) + sizeof(*hdr);
 585
 586     if (event_len < len) {
 587         len = event_len;
 588     }
 589
 590     cpu_physical_memory_write(buf, event->data, len);
 591     rtas_st(rets, 0, RTAS_OUT_SUCCESS);
 592     g_free(event->data);
 593     g_free(event);
 594     return;
 595
 596 out_no_events:
 597     rtas_st(rets, 0, RTAS_OUT_NO_ERRORS_FOUND);
 598 }
 599
 600 void spapr_events_init(sPAPRMachineState *spapr)
 601 {
 602     QTAILQ_INIT(&spapr->pending_events);
 603     spapr->check_exception_irq = xics_alloc(spapr->icp, 0, 0, false,
 604                                             &error_fatal);
 605     spapr->epow_notifier.notify = spapr_powerdown_req;
 606     qemu_register_powerdown_notifier(&spapr->epow_notifier);
 607     spapr_rtas_register(RTAS_CHECK_EXCEPTION, "check-exception",
 608                         check_exception);
 609     spapr_rtas_register(RTAS_EVENT_SCAN, "event-scan", event_scan);
 610 }