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