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
  41 #include <libfdt.h>
  42
  43 struct rtas_error_log {
  44     uint32_t summary;
  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     uint32_t extended_length;
  87 } QEMU_PACKED;
  88
  89 struct rtas_event_log_v6 {
  90     uint8_t b0;
  91 #define RTAS_LOG_V6_B0_VALID                          0x80
  92 #define RTAS_LOG_V6_B0_UNRECOVERABLE_ERROR            0x40
  93 #define RTAS_LOG_V6_B0_RECOVERABLE_ERROR              0x20
  94 #define RTAS_LOG_V6_B0_DEGRADED_OPERATION             0x10
  95 #define RTAS_LOG_V6_B0_PREDICTIVE_ERROR               0x08
  96 #define RTAS_LOG_V6_B0_NEW_LOG                        0x04
  97 #define RTAS_LOG_V6_B0_BIGENDIAN                      0x02
  98     uint8_t _resv1;
  99     uint8_t b2;
 100 #define RTAS_LOG_V6_B2_POWERPC_FORMAT                 0x80
 101 #define RTAS_LOG_V6_B2_LOG_FORMAT_MASK                0x0f
 102 #define   RTAS_LOG_V6_B2_LOG_FORMAT_PLATFORM_EVENT    0x0e
 103     uint8_t _resv2[9];
 104     uint32_t company;
 105 #define RTAS_LOG_V6_COMPANY_IBM                 0x49424d00 /* IBM<null> */
 106 } QEMU_PACKED;
 107
 108 struct rtas_event_log_v6_section_header {
 109     uint16_t section_id;
 110     uint16_t section_length;
 111     uint8_t section_version;
 112     uint8_t section_subtype;
 113     uint16_t creator_component_id;
 114 } QEMU_PACKED;
 115
 116 struct rtas_event_log_v6_maina {
 117 #define RTAS_LOG_V6_SECTION_ID_MAINA                0x5048 /* PH */
 118     struct rtas_event_log_v6_section_header hdr;
 119     uint32_t creation_date; /* BCD: YYYYMMDD */
 120     uint32_t creation_time; /* BCD: HHMMSS00 */
 121     uint8_t _platform1[8];
 122     char creator_id;
 123     uint8_t _resv1[2];
 124     uint8_t section_count;
 125     uint8_t _resv2[4];
 126     uint8_t _platform2[8];
 127     uint32_t plid;
 128     uint8_t _platform3[4];
 129 } QEMU_PACKED;
 130
 131 struct rtas_event_log_v6_mainb {
 132 #define RTAS_LOG_V6_SECTION_ID_MAINB                0x5548 /* UH */
 133     struct rtas_event_log_v6_section_header hdr;
 134     uint8_t subsystem_id;
 135     uint8_t _platform1;
 136     uint8_t event_severity;
 137     uint8_t event_subtype;
 138     uint8_t _platform2[4];
 139     uint8_t _resv1[2];
 140     uint16_t action_flags;
 141     uint8_t _resv2[4];
 142 } QEMU_PACKED;
 143
 144 struct rtas_event_log_v6_epow {
 145 #define RTAS_LOG_V6_SECTION_ID_EPOW                 0x4550 /* EP */
 146     struct rtas_event_log_v6_section_header hdr;
 147     uint8_t sensor_value;
 148 #define RTAS_LOG_V6_EPOW_ACTION_RESET                    0
 149 #define RTAS_LOG_V6_EPOW_ACTION_WARN_COOLING             1
 150 #define RTAS_LOG_V6_EPOW_ACTION_WARN_POWER               2
 151 #define RTAS_LOG_V6_EPOW_ACTION_SYSTEM_SHUTDOWN          3
 152 #define RTAS_LOG_V6_EPOW_ACTION_SYSTEM_HALT              4
 153 #define RTAS_LOG_V6_EPOW_ACTION_MAIN_ENCLOSURE           5
 154 #define RTAS_LOG_V6_EPOW_ACTION_POWER_OFF                7
 155     uint8_t event_modifier;
 156 #define RTAS_LOG_V6_EPOW_MODIFIER_NORMAL                 1
 157 #define RTAS_LOG_V6_EPOW_MODIFIER_ON_UPS                 2
 158 #define RTAS_LOG_V6_EPOW_MODIFIER_CRITICAL               3
 159 #define RTAS_LOG_V6_EPOW_MODIFIER_TEMPERATURE            4
 160     uint8_t extended_modifier;
 161 #define RTAS_LOG_V6_EPOW_XMODIFIER_SYSTEM_WIDE           0
 162 #define RTAS_LOG_V6_EPOW_XMODIFIER_PARTITION_SPECIFIC    1
 163     uint8_t _resv;
 164     uint64_t reason_code;
 165 } QEMU_PACKED;
 166
 167 struct epow_log_full {
 168     struct rtas_error_log hdr;
 169     struct rtas_event_log_v6 v6hdr;
 170     struct rtas_event_log_v6_maina maina;
 171     struct rtas_event_log_v6_mainb mainb;
 172     struct rtas_event_log_v6_epow epow;
 173 } QEMU_PACKED;
 174
 175 struct rtas_event_log_v6_hp {
 176 #define RTAS_LOG_V6_SECTION_ID_HOTPLUG              0x4850 /* HP */
 177     struct rtas_event_log_v6_section_header hdr;
 178     uint8_t hotplug_type;
 179 #define RTAS_LOG_V6_HP_TYPE_CPU                          1
 180 #define RTAS_LOG_V6_HP_TYPE_MEMORY                       2
 181 #define RTAS_LOG_V6_HP_TYPE_SLOT                         3
 182 #define RTAS_LOG_V6_HP_TYPE_PHB                          4
 183 #define RTAS_LOG_V6_HP_TYPE_PCI                          5
 184     uint8_t hotplug_action;
 185 #define RTAS_LOG_V6_HP_ACTION_ADD                        1
 186 #define RTAS_LOG_V6_HP_ACTION_REMOVE                     2
 187     uint8_t hotplug_identifier;
 188 #define RTAS_LOG_V6_HP_ID_DRC_NAME                       1
 189 #define RTAS_LOG_V6_HP_ID_DRC_INDEX                      2
 190 #define RTAS_LOG_V6_HP_ID_DRC_COUNT                      3
 191     uint8_t reserved;
 192     union {
 193         uint32_t index;
 194         uint32_t count;
 195         char name[1];
 196     } drc;
 197 } QEMU_PACKED;
 198
 199 struct hp_log_full {
 200     struct rtas_error_log hdr;
 201     struct rtas_event_log_v6 v6hdr;
 202     struct rtas_event_log_v6_maina maina;
 203     struct rtas_event_log_v6_mainb mainb;
 204     struct rtas_event_log_v6_hp hp;
 205 } QEMU_PACKED;
 206
 207 #define EVENT_MASK_INTERNAL_ERRORS           0x80000000
 208 #define EVENT_MASK_EPOW                      0x40000000
 209 #define EVENT_MASK_HOTPLUG                   0x10000000
 210 #define EVENT_MASK_IO                        0x08000000
 211
 212 #define _FDT(exp) \
 213     do { \
 214         int ret = (exp);                                           \
 215         if (ret < 0) {                                             \
 216             fprintf(stderr, "qemu: error creating device tree: %s: %s\n", \
 217                     #exp, fdt_strerror(ret));                      \
 218             exit(1);                                               \
 219         }                                                          \
 220     } while (0)
 221
 222 void spapr_events_fdt_skel(void *fdt, uint32_t check_exception_irq)
 223 {
 224     uint32_t irq_ranges[] = {cpu_to_be32(check_exception_irq), cpu_to_be32(1)};
 225     uint32_t interrupts[] = {cpu_to_be32(check_exception_irq), 0};
 226
 227     _FDT((fdt_begin_node(fdt, "event-sources")));
 228
 229     _FDT((fdt_property(fdt, "interrupt-controller", NULL, 0)));
 230     _FDT((fdt_property_cell(fdt, "#interrupt-cells", 2)));
 231     _FDT((fdt_property(fdt, "interrupt-ranges",
 232                        irq_ranges, sizeof(irq_ranges))));
 233
 234     _FDT((fdt_begin_node(fdt, "epow-events")));
 235     _FDT((fdt_property(fdt, "interrupts", interrupts, sizeof(interrupts))));
 236     _FDT((fdt_end_node(fdt)));
 237
 238     _FDT((fdt_end_node(fdt)));
 239 }
 240
 241 static void rtas_event_log_queue(int log_type, void *data, bool exception)
 242 {
 243     sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
 244     sPAPREventLogEntry *entry = g_new(sPAPREventLogEntry, 1);
 245
 246     g_assert(data);
 247     entry->log_type = log_type;
 248     entry->exception = exception;
 249     entry->data = data;
 250     QTAILQ_INSERT_TAIL(&spapr->pending_events, entry, next);
 251 }
 252
 253 static sPAPREventLogEntry *rtas_event_log_dequeue(uint32_t event_mask,
 254                                                   bool exception)
 255 {
 256     sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
 257     sPAPREventLogEntry *entry = NULL;
 258
 259     /* we only queue EPOW events atm. */
 260     if ((event_mask & EVENT_MASK_EPOW) == 0) {
 261         return NULL;
 262     }
 263
 264     QTAILQ_FOREACH(entry, &spapr->pending_events, next) {
 265         if (entry->exception != exception) {
 266             continue;
 267         }
 268
 269         /* EPOW and hotplug events are surfaced in the same manner */
 270         if (entry->log_type == RTAS_LOG_TYPE_EPOW ||
 271             entry->log_type == RTAS_LOG_TYPE_HOTPLUG) {
 272             break;
 273         }
 274     }
 275
 276     if (entry) {
 277         QTAILQ_REMOVE(&spapr->pending_events, entry, next);
 278     }
 279
 280     return entry;
 281 }
 282
 283 static bool rtas_event_log_contains(uint32_t event_mask, bool exception)
 284 {
 285     sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
 286     sPAPREventLogEntry *entry = NULL;
 287
 288     /* we only queue EPOW events atm. */
 289     if ((event_mask & EVENT_MASK_EPOW) == 0) {
 290         return false;
 291     }
 292
 293     QTAILQ_FOREACH(entry, &spapr->pending_events, next) {
 294         if (entry->exception != exception) {
 295             continue;
 296         }
 297
 298         /* EPOW and hotplug events are surfaced in the same manner */
 299         if (entry->log_type == RTAS_LOG_TYPE_EPOW ||
 300             entry->log_type == RTAS_LOG_TYPE_HOTPLUG) {
 301             return true;
 302         }
 303     }
 304
 305     return false;
 306 }
 307
 308 static uint32_t next_plid;
 309
 310 static void spapr_init_v6hdr(struct rtas_event_log_v6 *v6hdr)
 311 {
 312     v6hdr->b0 = RTAS_LOG_V6_B0_VALID | RTAS_LOG_V6_B0_NEW_LOG
 313         | RTAS_LOG_V6_B0_BIGENDIAN;
 314     v6hdr->b2 = RTAS_LOG_V6_B2_POWERPC_FORMAT
 315         | RTAS_LOG_V6_B2_LOG_FORMAT_PLATFORM_EVENT;
 316     v6hdr->company = cpu_to_be32(RTAS_LOG_V6_COMPANY_IBM);
 317 }
 318
 319 static void spapr_init_maina(struct rtas_event_log_v6_maina *maina,
 320                              int section_count)
 321 {
 322     sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
 323     struct tm tm;
 324     int year;
 325
 326     maina->hdr.section_id = cpu_to_be16(RTAS_LOG_V6_SECTION_ID_MAINA);
 327     maina->hdr.section_length = cpu_to_be16(sizeof(*maina));
 328     /* FIXME: section version, subtype and creator id? */
 329     spapr_rtc_read(spapr->rtc, &tm, NULL);
 330     year = tm.tm_year + 1900;
 331     maina->creation_date = cpu_to_be32((to_bcd(year / 100) << 24)
 332                                        | (to_bcd(year % 100) << 16)
 333                                        | (to_bcd(tm.tm_mon + 1) << 8)
 334                                        | to_bcd(tm.tm_mday));
 335     maina->creation_time = cpu_to_be32((to_bcd(tm.tm_hour) << 24)
 336                                        | (to_bcd(tm.tm_min) << 16)
 337                                        | (to_bcd(tm.tm_sec) << 8));
 338     maina->creator_id = 'H'; /* Hypervisor */
 339     maina->section_count = section_count;
 340     maina->plid = next_plid++;
 341 }
 342
 343 static void spapr_powerdown_req(Notifier *n, void *opaque)
 344 {
 345     sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
 346     struct rtas_error_log *hdr;
 347     struct rtas_event_log_v6 *v6hdr;
 348     struct rtas_event_log_v6_maina *maina;
 349     struct rtas_event_log_v6_mainb *mainb;
 350     struct rtas_event_log_v6_epow *epow;
 351     struct epow_log_full *new_epow;
 352
 353     new_epow = g_malloc0(sizeof(*new_epow));
 354     hdr = &new_epow->hdr;
 355     v6hdr = &new_epow->v6hdr;
 356     maina = &new_epow->maina;
 357     mainb = &new_epow->mainb;
 358     epow = &new_epow->epow;
 359
 360     hdr->summary = cpu_to_be32(RTAS_LOG_VERSION_6
 361                                | RTAS_LOG_SEVERITY_EVENT
 362                                | RTAS_LOG_DISPOSITION_NOT_RECOVERED
 363                                | RTAS_LOG_OPTIONAL_PART_PRESENT
 364                                | RTAS_LOG_TYPE_EPOW);
 365     hdr->extended_length = cpu_to_be32(sizeof(*new_epow)
 366                                        - sizeof(new_epow->hdr));
 367
 368     spapr_init_v6hdr(v6hdr);
 369     spapr_init_maina(maina, 3 /* Main-A, Main-B and EPOW */);
 370
 371     mainb->hdr.section_id = cpu_to_be16(RTAS_LOG_V6_SECTION_ID_MAINB);
 372     mainb->hdr.section_length = cpu_to_be16(sizeof(*mainb));
 373     /* FIXME: section version, subtype and creator id? */
 374     mainb->subsystem_id = 0xa0; /* External environment */
 375     mainb->event_severity = 0x00; /* Informational / non-error */
 376     mainb->event_subtype = 0xd0; /* Normal shutdown */
 377
 378     epow->hdr.section_id = cpu_to_be16(RTAS_LOG_V6_SECTION_ID_EPOW);
 379     epow->hdr.section_length = cpu_to_be16(sizeof(*epow));
 380     epow->hdr.section_version = 2; /* includes extended modifier */
 381     /* FIXME: section subtype and creator id? */
 382     epow->sensor_value = RTAS_LOG_V6_EPOW_ACTION_SYSTEM_SHUTDOWN;
 383     epow->event_modifier = RTAS_LOG_V6_EPOW_MODIFIER_NORMAL;
 384     epow->extended_modifier = RTAS_LOG_V6_EPOW_XMODIFIER_PARTITION_SPECIFIC;
 385
 386     rtas_event_log_queue(RTAS_LOG_TYPE_EPOW, new_epow, true);
 387
 388     qemu_irq_pulse(xics_get_qirq(spapr->icp, spapr->check_exception_irq));
 389 }
 390
 391 static void spapr_hotplug_req_event(uint8_t hp_id, uint8_t hp_action,
 392                                     sPAPRDRConnectorType drc_type,
 393                                     uint32_t drc)
 394 {
 395     sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
 396     struct hp_log_full *new_hp;
 397     struct rtas_error_log *hdr;
 398     struct rtas_event_log_v6 *v6hdr;
 399     struct rtas_event_log_v6_maina *maina;
 400     struct rtas_event_log_v6_mainb *mainb;
 401     struct rtas_event_log_v6_hp *hp;
 402
 403     new_hp = g_malloc0(sizeof(struct hp_log_full));
 404     hdr = &new_hp->hdr;
 405     v6hdr = &new_hp->v6hdr;
 406     maina = &new_hp->maina;
 407     mainb = &new_hp->mainb;
 408     hp = &new_hp->hp;
 409
 410     hdr->summary = cpu_to_be32(RTAS_LOG_VERSION_6
 411                                | RTAS_LOG_SEVERITY_EVENT
 412                                | RTAS_LOG_DISPOSITION_NOT_RECOVERED
 413                                | RTAS_LOG_OPTIONAL_PART_PRESENT
 414                                | RTAS_LOG_INITIATOR_HOTPLUG
 415                                | RTAS_LOG_TYPE_HOTPLUG);
 416     hdr->extended_length = cpu_to_be32(sizeof(*new_hp)
 417                                        - sizeof(new_hp->hdr));
 418
 419     spapr_init_v6hdr(v6hdr);
 420     spapr_init_maina(maina, 3 /* Main-A, Main-B, HP */);
 421
 422     mainb->hdr.section_id = cpu_to_be16(RTAS_LOG_V6_SECTION_ID_MAINB);
 423     mainb->hdr.section_length = cpu_to_be16(sizeof(*mainb));
 424     mainb->subsystem_id = 0x80; /* External environment */
 425     mainb->event_severity = 0x00; /* Informational / non-error */
 426     mainb->event_subtype = 0x00; /* Normal shutdown */
 427
 428     hp->hdr.section_id = cpu_to_be16(RTAS_LOG_V6_SECTION_ID_HOTPLUG);
 429     hp->hdr.section_length = cpu_to_be16(sizeof(*hp));
 430     hp->hdr.section_version = 1; /* includes extended modifier */
 431     hp->hotplug_action = hp_action;
 432     hp->hotplug_identifier = hp_id;
 433
 434     switch (drc_type) {
 435     case SPAPR_DR_CONNECTOR_TYPE_PCI:
 436         hp->hotplug_type = RTAS_LOG_V6_HP_TYPE_PCI;
 437         break;
 438     case SPAPR_DR_CONNECTOR_TYPE_LMB:
 439         hp->hotplug_type = RTAS_LOG_V6_HP_TYPE_MEMORY;
 440         break;
 441     default:
 442         /* we shouldn't be signaling hotplug events for resources
 443          * that don't support them
 444          */
 445         g_assert(false);
 446         return;
 447     }
 448
 449     if (hp_id == RTAS_LOG_V6_HP_ID_DRC_COUNT) {
 450         hp->drc.count = cpu_to_be32(drc);
 451     } else if (hp_id == RTAS_LOG_V6_HP_ID_DRC_INDEX) {
 452         hp->drc.index = cpu_to_be32(drc);
 453     }
 454
 455     rtas_event_log_queue(RTAS_LOG_TYPE_HOTPLUG, new_hp, true);
 456
 457     qemu_irq_pulse(xics_get_qirq(spapr->icp, spapr->check_exception_irq));
 458 }
 459
 460 void spapr_hotplug_req_add_by_index(sPAPRDRConnector *drc)
 461 {
 462     sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
 463     sPAPRDRConnectorType drc_type = drck->get_type(drc);
 464     uint32_t index = drck->get_index(drc);
 465
 466     spapr_hotplug_req_event(RTAS_LOG_V6_HP_ID_DRC_INDEX,
 467                             RTAS_LOG_V6_HP_ACTION_ADD, drc_type, index);
 468 }
 469
 470 void spapr_hotplug_req_remove_by_index(sPAPRDRConnector *drc)
 471 {
 472     sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
 473     sPAPRDRConnectorType drc_type = drck->get_type(drc);
 474     uint32_t index = drck->get_index(drc);
 475
 476     spapr_hotplug_req_event(RTAS_LOG_V6_HP_ID_DRC_INDEX,
 477                             RTAS_LOG_V6_HP_ACTION_REMOVE, drc_type, index);
 478 }
 479
 480 void spapr_hotplug_req_add_by_count(sPAPRDRConnectorType drc_type,
 481                                        uint32_t count)
 482 {
 483     spapr_hotplug_req_event(RTAS_LOG_V6_HP_ID_DRC_COUNT,
 484                             RTAS_LOG_V6_HP_ACTION_ADD, drc_type, count);
 485 }
 486
 487 void spapr_hotplug_req_remove_by_count(sPAPRDRConnectorType drc_type,
 488                                           uint32_t count)
 489 {
 490     spapr_hotplug_req_event(RTAS_LOG_V6_HP_ID_DRC_COUNT,
 491                             RTAS_LOG_V6_HP_ACTION_REMOVE, drc_type, count);
 492 }
 493
 494 static void check_exception(PowerPCCPU *cpu, sPAPRMachineState *spapr,
 495                             uint32_t token, uint32_t nargs,
 496                             target_ulong args,
 497                             uint32_t nret, target_ulong rets)
 498 {
 499     uint32_t mask, buf, len, event_len;
 500     uint64_t xinfo;
 501     sPAPREventLogEntry *event;
 502     struct rtas_error_log *hdr;
 503
 504     if ((nargs < 6) || (nargs > 7) || nret != 1) {
 505         rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 506         return;
 507     }
 508
 509     xinfo = rtas_ld(args, 1);
 510     mask = rtas_ld(args, 2);
 511     buf = rtas_ld(args, 4);
 512     len = rtas_ld(args, 5);
 513     if (nargs == 7) {
 514         xinfo |= (uint64_t)rtas_ld(args, 6) << 32;
 515     }
 516
 517     event = rtas_event_log_dequeue(mask, true);
 518     if (!event) {
 519         goto out_no_events;
 520     }
 521
 522     hdr = event->data;
 523     event_len = be32_to_cpu(hdr->extended_length) + sizeof(*hdr);
 524
 525     if (event_len < len) {
 526         len = event_len;
 527     }
 528
 529     cpu_physical_memory_write(buf, event->data, len);
 530     rtas_st(rets, 0, RTAS_OUT_SUCCESS);
 531     g_free(event->data);
 532     g_free(event);
 533
 534     /* according to PAPR+, the IRQ must be left asserted, or re-asserted, if
 535      * there are still pending events to be fetched via check-exception. We
 536      * do the latter here, since our code relies on edge-triggered
 537      * interrupts.
 538      */
 539     if (rtas_event_log_contains(mask, true)) {
 540         qemu_irq_pulse(xics_get_qirq(spapr->icp, spapr->check_exception_irq));
 541     }
 542
 543     return;
 544
 545 out_no_events:
 546     rtas_st(rets, 0, RTAS_OUT_NO_ERRORS_FOUND);
 547 }
 548
 549 static void event_scan(PowerPCCPU *cpu, sPAPRMachineState *spapr,
 550                        uint32_t token, uint32_t nargs,
 551                        target_ulong args,
 552                        uint32_t nret, target_ulong rets)
 553 {
 554     uint32_t mask, buf, len, event_len;
 555     sPAPREventLogEntry *event;
 556     struct rtas_error_log *hdr;
 557
 558     if (nargs != 4 || nret != 1) {
 559         rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 560         return;
 561     }
 562
 563     mask = rtas_ld(args, 0);
 564     buf = rtas_ld(args, 2);
 565     len = rtas_ld(args, 3);
 566
 567     event = rtas_event_log_dequeue(mask, false);
 568     if (!event) {
 569         goto out_no_events;
 570     }
 571
 572     hdr = event->data;
 573     event_len = be32_to_cpu(hdr->extended_length) + sizeof(*hdr);
 574
 575     if (event_len < len) {
 576         len = event_len;
 577     }
 578
 579     cpu_physical_memory_write(buf, event->data, len);
 580     rtas_st(rets, 0, RTAS_OUT_SUCCESS);
 581     g_free(event->data);
 582     g_free(event);
 583     return;
 584
 585 out_no_events:
 586     rtas_st(rets, 0, RTAS_OUT_NO_ERRORS_FOUND);
 587 }
 588
 589 void spapr_events_init(sPAPRMachineState *spapr)
 590 {
 591     QTAILQ_INIT(&spapr->pending_events);
 592     spapr->check_exception_irq = xics_alloc(spapr->icp, 0, 0, false,
 593                                             &error_fatal);
 594     spapr->epow_notifier.notify = spapr_powerdown_req;
 595     qemu_register_powerdown_notifier(&spapr->epow_notifier);
 596     spapr_rtas_register(RTAS_CHECK_EXCEPTION, "check-exception",
 597                         check_exception);
 598     spapr_rtas_register(RTAS_EVENT_SCAN, "event-scan", event_scan);
 599 }