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 "cpu.h"
  29 #include "sysemu/sysemu.h"
  30 #include "sysemu/char.h"
  31 #include "hw/qdev.h"
  32 #include "sysemu/device_tree.h"
  33
  34 #include "hw/ppc/spapr.h"
  35 #include "hw/ppc/spapr_vio.h"
  36 #include "hw/pci/pci.h"
  37 #include "hw/pci-host/spapr.h"
  38 #include "hw/ppc/spapr_drc.h"
  39
  40 #include <libfdt.h>
  41
  42 struct rtas_error_log {
  43     uint32_t summary;
  44 #define RTAS_LOG_VERSION_MASK                   0xff000000
  45 #define   RTAS_LOG_VERSION_6                    0x06000000
  46 #define RTAS_LOG_SEVERITY_MASK                  0x00e00000
  47 #define   RTAS_LOG_SEVERITY_ALREADY_REPORTED    0x00c00000
  48 #define   RTAS_LOG_SEVERITY_FATAL               0x00a00000
  49 #define   RTAS_LOG_SEVERITY_ERROR               0x00800000
  50 #define   RTAS_LOG_SEVERITY_ERROR_SYNC          0x00600000
  51 #define   RTAS_LOG_SEVERITY_WARNING             0x00400000
  52 #define   RTAS_LOG_SEVERITY_EVENT               0x00200000
  53 #define   RTAS_LOG_SEVERITY_NO_ERROR            0x00000000
  54 #define RTAS_LOG_DISPOSITION_MASK               0x00180000
  55 #define   RTAS_LOG_DISPOSITION_FULLY_RECOVERED  0x00000000
  56 #define   RTAS_LOG_DISPOSITION_LIMITED_RECOVERY 0x00080000
  57 #define   RTAS_LOG_DISPOSITION_NOT_RECOVERED    0x00100000
  58 #define RTAS_LOG_OPTIONAL_PART_PRESENT          0x00040000
  59 #define RTAS_LOG_INITIATOR_MASK                 0x0000f000
  60 #define   RTAS_LOG_INITIATOR_UNKNOWN            0x00000000
  61 #define   RTAS_LOG_INITIATOR_CPU                0x00001000
  62 #define   RTAS_LOG_INITIATOR_PCI                0x00002000
  63 #define   RTAS_LOG_INITIATOR_MEMORY             0x00004000
  64 #define   RTAS_LOG_INITIATOR_HOTPLUG            0x00006000
  65 #define RTAS_LOG_TARGET_MASK                    0x00000f00
  66 #define   RTAS_LOG_TARGET_UNKNOWN               0x00000000
  67 #define   RTAS_LOG_TARGET_CPU                   0x00000100
  68 #define   RTAS_LOG_TARGET_PCI                   0x00000200
  69 #define   RTAS_LOG_TARGET_MEMORY                0x00000400
  70 #define   RTAS_LOG_TARGET_HOTPLUG               0x00000600
  71 #define RTAS_LOG_TYPE_MASK                      0x000000ff
  72 #define   RTAS_LOG_TYPE_OTHER                   0x00000000
  73 #define   RTAS_LOG_TYPE_RETRY                   0x00000001
  74 #define   RTAS_LOG_TYPE_TCE_ERR                 0x00000002
  75 #define   RTAS_LOG_TYPE_INTERN_DEV_FAIL         0x00000003
  76 #define   RTAS_LOG_TYPE_TIMEOUT                 0x00000004
  77 #define   RTAS_LOG_TYPE_DATA_PARITY             0x00000005
  78 #define   RTAS_LOG_TYPE_ADDR_PARITY             0x00000006
  79 #define   RTAS_LOG_TYPE_CACHE_PARITY            0x00000007
  80 #define   RTAS_LOG_TYPE_ADDR_INVALID            0x00000008
  81 #define   RTAS_LOG_TYPE_ECC_UNCORR              0x00000009
  82 #define   RTAS_LOG_TYPE_ECC_CORR                0x0000000a
  83 #define   RTAS_LOG_TYPE_EPOW                    0x00000040
  84 #define   RTAS_LOG_TYPE_HOTPLUG                 0x000000e5
  85     uint32_t extended_length;
  86 } QEMU_PACKED;
  87
  88 struct rtas_event_log_v6 {
  89     uint8_t b0;
  90 #define RTAS_LOG_V6_B0_VALID                          0x80
  91 #define RTAS_LOG_V6_B0_UNRECOVERABLE_ERROR            0x40
  92 #define RTAS_LOG_V6_B0_RECOVERABLE_ERROR              0x20
  93 #define RTAS_LOG_V6_B0_DEGRADED_OPERATION             0x10
  94 #define RTAS_LOG_V6_B0_PREDICTIVE_ERROR               0x08
  95 #define RTAS_LOG_V6_B0_NEW_LOG                        0x04
  96 #define RTAS_LOG_V6_B0_BIGENDIAN                      0x02
  97     uint8_t _resv1;
  98     uint8_t b2;
  99 #define RTAS_LOG_V6_B2_POWERPC_FORMAT                 0x80
 100 #define RTAS_LOG_V6_B2_LOG_FORMAT_MASK                0x0f
 101 #define   RTAS_LOG_V6_B2_LOG_FORMAT_PLATFORM_EVENT    0x0e
 102     uint8_t _resv2[9];
 103     uint32_t company;
 104 #define RTAS_LOG_V6_COMPANY_IBM                 0x49424d00 /* IBM<null> */
 105 } QEMU_PACKED;
 106
 107 struct rtas_event_log_v6_section_header {
 108     uint16_t section_id;
 109     uint16_t section_length;
 110     uint8_t section_version;
 111     uint8_t section_subtype;
 112     uint16_t creator_component_id;
 113 } QEMU_PACKED;
 114
 115 struct rtas_event_log_v6_maina {
 116 #define RTAS_LOG_V6_SECTION_ID_MAINA                0x5048 /* PH */
 117     struct rtas_event_log_v6_section_header hdr;
 118     uint32_t creation_date; /* BCD: YYYYMMDD */
 119     uint32_t creation_time; /* BCD: HHMMSS00 */
 120     uint8_t _platform1[8];
 121     char creator_id;
 122     uint8_t _resv1[2];
 123     uint8_t section_count;
 124     uint8_t _resv2[4];
 125     uint8_t _platform2[8];
 126     uint32_t plid;
 127     uint8_t _platform3[4];
 128 } QEMU_PACKED;
 129
 130 struct rtas_event_log_v6_mainb {
 131 #define RTAS_LOG_V6_SECTION_ID_MAINB                0x5548 /* UH */
 132     struct rtas_event_log_v6_section_header hdr;
 133     uint8_t subsystem_id;
 134     uint8_t _platform1;
 135     uint8_t event_severity;
 136     uint8_t event_subtype;
 137     uint8_t _platform2[4];
 138     uint8_t _resv1[2];
 139     uint16_t action_flags;
 140     uint8_t _resv2[4];
 141 } QEMU_PACKED;
 142
 143 struct rtas_event_log_v6_epow {
 144 #define RTAS_LOG_V6_SECTION_ID_EPOW                 0x4550 /* EP */
 145     struct rtas_event_log_v6_section_header hdr;
 146     uint8_t sensor_value;
 147 #define RTAS_LOG_V6_EPOW_ACTION_RESET                    0
 148 #define RTAS_LOG_V6_EPOW_ACTION_WARN_COOLING             1
 149 #define RTAS_LOG_V6_EPOW_ACTION_WARN_POWER               2
 150 #define RTAS_LOG_V6_EPOW_ACTION_SYSTEM_SHUTDOWN          3
 151 #define RTAS_LOG_V6_EPOW_ACTION_SYSTEM_HALT              4
 152 #define RTAS_LOG_V6_EPOW_ACTION_MAIN_ENCLOSURE           5
 153 #define RTAS_LOG_V6_EPOW_ACTION_POWER_OFF                7
 154     uint8_t event_modifier;
 155 #define RTAS_LOG_V6_EPOW_MODIFIER_NORMAL                 1
 156 #define RTAS_LOG_V6_EPOW_MODIFIER_ON_UPS                 2
 157 #define RTAS_LOG_V6_EPOW_MODIFIER_CRITICAL               3
 158 #define RTAS_LOG_V6_EPOW_MODIFIER_TEMPERATURE            4
 159     uint8_t extended_modifier;
 160 #define RTAS_LOG_V6_EPOW_XMODIFIER_SYSTEM_WIDE           0
 161 #define RTAS_LOG_V6_EPOW_XMODIFIER_PARTITION_SPECIFIC    1
 162     uint8_t _resv;
 163     uint64_t reason_code;
 164 } QEMU_PACKED;
 165
 166 struct epow_log_full {
 167     struct rtas_error_log hdr;
 168     struct rtas_event_log_v6 v6hdr;
 169     struct rtas_event_log_v6_maina maina;
 170     struct rtas_event_log_v6_mainb mainb;
 171     struct rtas_event_log_v6_epow epow;
 172 } QEMU_PACKED;
 173
 174 struct rtas_event_log_v6_hp {
 175 #define RTAS_LOG_V6_SECTION_ID_HOTPLUG              0x4850 /* HP */
 176     struct rtas_event_log_v6_section_header hdr;
 177     uint8_t hotplug_type;
 178 #define RTAS_LOG_V6_HP_TYPE_CPU                          1
 179 #define RTAS_LOG_V6_HP_TYPE_MEMORY                       2
 180 #define RTAS_LOG_V6_HP_TYPE_SLOT                         3
 181 #define RTAS_LOG_V6_HP_TYPE_PHB                          4
 182 #define RTAS_LOG_V6_HP_TYPE_PCI                          5
 183     uint8_t hotplug_action;
 184 #define RTAS_LOG_V6_HP_ACTION_ADD                        1
 185 #define RTAS_LOG_V6_HP_ACTION_REMOVE                     2
 186     uint8_t hotplug_identifier;
 187 #define RTAS_LOG_V6_HP_ID_DRC_NAME                       1
 188 #define RTAS_LOG_V6_HP_ID_DRC_INDEX                      2
 189 #define RTAS_LOG_V6_HP_ID_DRC_COUNT                      3
 190     uint8_t reserved;
 191     union {
 192         uint32_t index;
 193         uint32_t count;
 194         char name[1];
 195     } drc;
 196 } QEMU_PACKED;
 197
 198 struct hp_log_full {
 199     struct rtas_error_log hdr;
 200     struct rtas_event_log_v6 v6hdr;
 201     struct rtas_event_log_v6_maina maina;
 202     struct rtas_event_log_v6_mainb mainb;
 203     struct rtas_event_log_v6_hp hp;
 204 } QEMU_PACKED;
 205
 206 #define EVENT_MASK_INTERNAL_ERRORS           0x80000000
 207 #define EVENT_MASK_EPOW                      0x40000000
 208 #define EVENT_MASK_HOTPLUG                   0x10000000
 209 #define EVENT_MASK_IO                        0x08000000
 210
 211 #define _FDT(exp) \
 212     do { \
 213         int ret = (exp);                                           \
 214         if (ret < 0) {                                             \
 215             fprintf(stderr, "qemu: error creating device tree: %s: %s\n", \
 216                     #exp, fdt_strerror(ret));                      \
 217             exit(1);                                               \
 218         }                                                          \
 219     } while (0)
 220
 221 void spapr_events_fdt_skel(void *fdt, uint32_t check_exception_irq)
 222 {
 223     uint32_t irq_ranges[] = {cpu_to_be32(check_exception_irq), cpu_to_be32(1)};
 224     uint32_t interrupts[] = {cpu_to_be32(check_exception_irq), 0};
 225
 226     _FDT((fdt_begin_node(fdt, "event-sources")));
 227
 228     _FDT((fdt_property(fdt, "interrupt-controller", NULL, 0)));
 229     _FDT((fdt_property_cell(fdt, "#interrupt-cells", 2)));
 230     _FDT((fdt_property(fdt, "interrupt-ranges",
 231                        irq_ranges, sizeof(irq_ranges))));
 232
 233     _FDT((fdt_begin_node(fdt, "epow-events")));
 234     _FDT((fdt_property(fdt, "interrupts", interrupts, sizeof(interrupts))));
 235     _FDT((fdt_end_node(fdt)));
 236
 237     _FDT((fdt_end_node(fdt)));
 238 }
 239
 240 static void rtas_event_log_queue(int log_type, void *data, bool exception)
 241 {
 242     sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
 243     sPAPREventLogEntry *entry = g_new(sPAPREventLogEntry, 1);
 244
 245     g_assert(data);
 246     entry->log_type = log_type;
 247     entry->exception = exception;
 248     entry->data = data;
 249     QTAILQ_INSERT_TAIL(&spapr->pending_events, entry, next);
 250 }
 251
 252 static sPAPREventLogEntry *rtas_event_log_dequeue(uint32_t event_mask,
 253                                                   bool exception)
 254 {
 255     sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
 256     sPAPREventLogEntry *entry = NULL;
 257
 258     /* we only queue EPOW events atm. */
 259     if ((event_mask & EVENT_MASK_EPOW) == 0) {
 260         return NULL;
 261     }
 262
 263     QTAILQ_FOREACH(entry, &spapr->pending_events, next) {
 264         if (entry->exception != exception) {
 265             continue;
 266         }
 267
 268         /* EPOW and hotplug events are surfaced in the same manner */
 269         if (entry->log_type == RTAS_LOG_TYPE_EPOW ||
 270             entry->log_type == RTAS_LOG_TYPE_HOTPLUG) {
 271             break;
 272         }
 273     }
 274
 275     if (entry) {
 276         QTAILQ_REMOVE(&spapr->pending_events, entry, next);
 277     }
 278
 279     return entry;
 280 }
 281
 282 static bool rtas_event_log_contains(uint32_t event_mask, bool exception)
 283 {
 284     sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
 285     sPAPREventLogEntry *entry = NULL;
 286
 287     /* we only queue EPOW events atm. */
 288     if ((event_mask & EVENT_MASK_EPOW) == 0) {
 289         return false;
 290     }
 291
 292     QTAILQ_FOREACH(entry, &spapr->pending_events, next) {
 293         if (entry->exception != exception) {
 294             continue;
 295         }
 296
 297         /* EPOW and hotplug events are surfaced in the same manner */
 298         if (entry->log_type == RTAS_LOG_TYPE_EPOW ||
 299             entry->log_type == RTAS_LOG_TYPE_HOTPLUG) {
 300             return true;
 301         }
 302     }
 303
 304     return false;
 305 }
 306
 307 static uint32_t next_plid;
 308
 309 static void spapr_init_v6hdr(struct rtas_event_log_v6 *v6hdr)
 310 {
 311     v6hdr->b0 = RTAS_LOG_V6_B0_VALID | RTAS_LOG_V6_B0_NEW_LOG
 312         | RTAS_LOG_V6_B0_BIGENDIAN;
 313     v6hdr->b2 = RTAS_LOG_V6_B2_POWERPC_FORMAT
 314         | RTAS_LOG_V6_B2_LOG_FORMAT_PLATFORM_EVENT;
 315     v6hdr->company = cpu_to_be32(RTAS_LOG_V6_COMPANY_IBM);
 316 }
 317
 318 static void spapr_init_maina(struct rtas_event_log_v6_maina *maina,
 319                              int section_count)
 320 {
 321     sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
 322     struct tm tm;
 323     int year;
 324
 325     maina->hdr.section_id = cpu_to_be16(RTAS_LOG_V6_SECTION_ID_MAINA);
 326     maina->hdr.section_length = cpu_to_be16(sizeof(*maina));
 327     /* FIXME: section version, subtype and creator id? */
 328     spapr_rtc_read(spapr->rtc, &tm, NULL);
 329     year = tm.tm_year + 1900;
 330     maina->creation_date = cpu_to_be32((to_bcd(year / 100) << 24)
 331                                        | (to_bcd(year % 100) << 16)
 332                                        | (to_bcd(tm.tm_mon + 1) << 8)
 333                                        | to_bcd(tm.tm_mday));
 334     maina->creation_time = cpu_to_be32((to_bcd(tm.tm_hour) << 24)
 335                                        | (to_bcd(tm.tm_min) << 16)
 336                                        | (to_bcd(tm.tm_sec) << 8));
 337     maina->creator_id = 'H'; /* Hypervisor */
 338     maina->section_count = section_count;
 339     maina->plid = next_plid++;
 340 }
 341
 342 static void spapr_powerdown_req(Notifier *n, void *opaque)
 343 {
 344     sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
 345     struct rtas_error_log *hdr;
 346     struct rtas_event_log_v6 *v6hdr;
 347     struct rtas_event_log_v6_maina *maina;
 348     struct rtas_event_log_v6_mainb *mainb;
 349     struct rtas_event_log_v6_epow *epow;
 350     struct epow_log_full *new_epow;
 351
 352     new_epow = g_malloc0(sizeof(*new_epow));
 353     hdr = &new_epow->hdr;
 354     v6hdr = &new_epow->v6hdr;
 355     maina = &new_epow->maina;
 356     mainb = &new_epow->mainb;
 357     epow = &new_epow->epow;
 358
 359     hdr->summary = cpu_to_be32(RTAS_LOG_VERSION_6
 360                                | RTAS_LOG_SEVERITY_EVENT
 361                                | RTAS_LOG_DISPOSITION_NOT_RECOVERED
 362                                | RTAS_LOG_OPTIONAL_PART_PRESENT
 363                                | RTAS_LOG_TYPE_EPOW);
 364     hdr->extended_length = cpu_to_be32(sizeof(*new_epow)
 365                                        - sizeof(new_epow->hdr));
 366
 367     spapr_init_v6hdr(v6hdr);
 368     spapr_init_maina(maina, 3 /* Main-A, Main-B and EPOW */);
 369
 370     mainb->hdr.section_id = cpu_to_be16(RTAS_LOG_V6_SECTION_ID_MAINB);
 371     mainb->hdr.section_length = cpu_to_be16(sizeof(*mainb));
 372     /* FIXME: section version, subtype and creator id? */
 373     mainb->subsystem_id = 0xa0; /* External environment */
 374     mainb->event_severity = 0x00; /* Informational / non-error */
 375     mainb->event_subtype = 0xd0; /* Normal shutdown */
 376
 377     epow->hdr.section_id = cpu_to_be16(RTAS_LOG_V6_SECTION_ID_EPOW);
 378     epow->hdr.section_length = cpu_to_be16(sizeof(*epow));
 379     epow->hdr.section_version = 2; /* includes extended modifier */
 380     /* FIXME: section subtype and creator id? */
 381     epow->sensor_value = RTAS_LOG_V6_EPOW_ACTION_SYSTEM_SHUTDOWN;
 382     epow->event_modifier = RTAS_LOG_V6_EPOW_MODIFIER_NORMAL;
 383     epow->extended_modifier = RTAS_LOG_V6_EPOW_XMODIFIER_PARTITION_SPECIFIC;
 384
 385     rtas_event_log_queue(RTAS_LOG_TYPE_EPOW, new_epow, true);
 386
 387     qemu_irq_pulse(xics_get_qirq(spapr->icp, spapr->check_exception_irq));
 388 }
 389
 390 static void spapr_hotplug_req_event(uint8_t hp_id, uint8_t hp_action,
 391                                     sPAPRDRConnectorType drc_type,
 392                                     uint32_t drc)
 393 {
 394     sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
 395     struct hp_log_full *new_hp;
 396     struct rtas_error_log *hdr;
 397     struct rtas_event_log_v6 *v6hdr;
 398     struct rtas_event_log_v6_maina *maina;
 399     struct rtas_event_log_v6_mainb *mainb;
 400     struct rtas_event_log_v6_hp *hp;
 401
 402     new_hp = g_malloc0(sizeof(struct hp_log_full));
 403     hdr = &new_hp->hdr;
 404     v6hdr = &new_hp->v6hdr;
 405     maina = &new_hp->maina;
 406     mainb = &new_hp->mainb;
 407     hp = &new_hp->hp;
 408
 409     hdr->summary = cpu_to_be32(RTAS_LOG_VERSION_6
 410                                | RTAS_LOG_SEVERITY_EVENT
 411                                | RTAS_LOG_DISPOSITION_NOT_RECOVERED
 412                                | RTAS_LOG_OPTIONAL_PART_PRESENT
 413                                | RTAS_LOG_INITIATOR_HOTPLUG
 414                                | RTAS_LOG_TYPE_HOTPLUG);
 415     hdr->extended_length = cpu_to_be32(sizeof(*new_hp)
 416                                        - sizeof(new_hp->hdr));
 417
 418     spapr_init_v6hdr(v6hdr);
 419     spapr_init_maina(maina, 3 /* Main-A, Main-B, HP */);
 420
 421     mainb->hdr.section_id = cpu_to_be16(RTAS_LOG_V6_SECTION_ID_MAINB);
 422     mainb->hdr.section_length = cpu_to_be16(sizeof(*mainb));
 423     mainb->subsystem_id = 0x80; /* External environment */
 424     mainb->event_severity = 0x00; /* Informational / non-error */
 425     mainb->event_subtype = 0x00; /* Normal shutdown */
 426
 427     hp->hdr.section_id = cpu_to_be16(RTAS_LOG_V6_SECTION_ID_HOTPLUG);
 428     hp->hdr.section_length = cpu_to_be16(sizeof(*hp));
 429     hp->hdr.section_version = 1; /* includes extended modifier */
 430     hp->hotplug_action = hp_action;
 431     hp->hotplug_identifier = hp_id;
 432
 433     switch (drc_type) {
 434     case SPAPR_DR_CONNECTOR_TYPE_PCI:
 435         hp->hotplug_type = RTAS_LOG_V6_HP_TYPE_PCI;
 436         break;
 437     case SPAPR_DR_CONNECTOR_TYPE_LMB:
 438         hp->hotplug_type = RTAS_LOG_V6_HP_TYPE_MEMORY;
 439         break;
 440     default:
 441         /* we shouldn't be signaling hotplug events for resources
 442          * that don't support them
 443          */
 444         g_assert(false);
 445         return;
 446     }
 447
 448     if (hp_id == RTAS_LOG_V6_HP_ID_DRC_COUNT) {
 449         hp->drc.count = cpu_to_be32(drc);
 450     } else if (hp_id == RTAS_LOG_V6_HP_ID_DRC_INDEX) {
 451         hp->drc.index = cpu_to_be32(drc);
 452     }
 453
 454     rtas_event_log_queue(RTAS_LOG_TYPE_HOTPLUG, new_hp, true);
 455
 456     qemu_irq_pulse(xics_get_qirq(spapr->icp, spapr->check_exception_irq));
 457 }
 458
 459 void spapr_hotplug_req_add_by_index(sPAPRDRConnector *drc)
 460 {
 461     sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
 462     sPAPRDRConnectorType drc_type = drck->get_type(drc);
 463     uint32_t index = drck->get_index(drc);
 464
 465     spapr_hotplug_req_event(RTAS_LOG_V6_HP_ID_DRC_INDEX,
 466                             RTAS_LOG_V6_HP_ACTION_ADD, drc_type, index);
 467 }
 468
 469 void spapr_hotplug_req_remove_by_index(sPAPRDRConnector *drc)
 470 {
 471     sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
 472     sPAPRDRConnectorType drc_type = drck->get_type(drc);
 473     uint32_t index = drck->get_index(drc);
 474
 475     spapr_hotplug_req_event(RTAS_LOG_V6_HP_ID_DRC_INDEX,
 476                             RTAS_LOG_V6_HP_ACTION_REMOVE, drc_type, index);
 477 }
 478
 479 void spapr_hotplug_req_add_by_count(sPAPRDRConnectorType drc_type,
 480                                        uint32_t count)
 481 {
 482     spapr_hotplug_req_event(RTAS_LOG_V6_HP_ID_DRC_COUNT,
 483                             RTAS_LOG_V6_HP_ACTION_ADD, drc_type, count);
 484 }
 485
 486 void spapr_hotplug_req_remove_by_count(sPAPRDRConnectorType drc_type,
 487                                           uint32_t count)
 488 {
 489     spapr_hotplug_req_event(RTAS_LOG_V6_HP_ID_DRC_COUNT,
 490                             RTAS_LOG_V6_HP_ACTION_REMOVE, drc_type, count);
 491 }
 492
 493 static void check_exception(PowerPCCPU *cpu, sPAPRMachineState *spapr,
 494                             uint32_t token, uint32_t nargs,
 495                             target_ulong args,
 496                             uint32_t nret, target_ulong rets)
 497 {
 498     uint32_t mask, buf, len, event_len;
 499     uint64_t xinfo;
 500     sPAPREventLogEntry *event;
 501     struct rtas_error_log *hdr;
 502
 503     if ((nargs < 6) || (nargs > 7) || nret != 1) {
 504         rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 505         return;
 506     }
 507
 508     xinfo = rtas_ld(args, 1);
 509     mask = rtas_ld(args, 2);
 510     buf = rtas_ld(args, 4);
 511     len = rtas_ld(args, 5);
 512     if (nargs == 7) {
 513         xinfo |= (uint64_t)rtas_ld(args, 6) << 32;
 514     }
 515
 516     event = rtas_event_log_dequeue(mask, true);
 517     if (!event) {
 518         goto out_no_events;
 519     }
 520
 521     hdr = event->data;
 522     event_len = be32_to_cpu(hdr->extended_length) + sizeof(*hdr);
 523
 524     if (event_len < len) {
 525         len = event_len;
 526     }
 527
 528     cpu_physical_memory_write(buf, event->data, len);
 529     rtas_st(rets, 0, RTAS_OUT_SUCCESS);
 530     g_free(event->data);
 531     g_free(event);
 532
 533     /* according to PAPR+, the IRQ must be left asserted, or re-asserted, if
 534      * there are still pending events to be fetched via check-exception. We
 535      * do the latter here, since our code relies on edge-triggered
 536      * interrupts.
 537      */
 538     if (rtas_event_log_contains(mask, true)) {
 539         qemu_irq_pulse(xics_get_qirq(spapr->icp, spapr->check_exception_irq));
 540     }
 541
 542     return;
 543
 544 out_no_events:
 545     rtas_st(rets, 0, RTAS_OUT_NO_ERRORS_FOUND);
 546 }
 547
 548 static void event_scan(PowerPCCPU *cpu, sPAPRMachineState *spapr,
 549                        uint32_t token, uint32_t nargs,
 550                        target_ulong args,
 551                        uint32_t nret, target_ulong rets)
 552 {
 553     uint32_t mask, buf, len, event_len;
 554     sPAPREventLogEntry *event;
 555     struct rtas_error_log *hdr;
 556
 557     if (nargs != 4 || nret != 1) {
 558         rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 559         return;
 560     }
 561
 562     mask = rtas_ld(args, 0);
 563     buf = rtas_ld(args, 2);
 564     len = rtas_ld(args, 3);
 565
 566     event = rtas_event_log_dequeue(mask, false);
 567     if (!event) {
 568         goto out_no_events;
 569     }
 570
 571     hdr = event->data;
 572     event_len = be32_to_cpu(hdr->extended_length) + sizeof(*hdr);
 573
 574     if (event_len < len) {
 575         len = event_len;
 576     }
 577
 578     cpu_physical_memory_write(buf, event->data, len);
 579     rtas_st(rets, 0, RTAS_OUT_SUCCESS);
 580     g_free(event->data);
 581     g_free(event);
 582     return;
 583
 584 out_no_events:
 585     rtas_st(rets, 0, RTAS_OUT_NO_ERRORS_FOUND);
 586 }
 587
 588 void spapr_events_init(sPAPRMachineState *spapr)
 589 {
 590     QTAILQ_INIT(&spapr->pending_events);
 591     spapr->check_exception_irq = xics_alloc(spapr->icp, 0, 0, false);
 592     spapr->epow_notifier.notify = spapr_powerdown_req;
 593     qemu_register_powerdown_notifier(&spapr->epow_notifier);
 594     spapr_rtas_register(RTAS_CHECK_EXCEPTION, "check-exception",
 595                         check_exception);
 596     spapr_rtas_register(RTAS_EVENT_SCAN, "event-scan", event_scan);
 597 }