qemu/hw/acpi/piix4.c

   1 /*
   2  * ACPI implementation
   3  *
   4  * Copyright (c) 2006 Fabrice Bellard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License version 2 as published by the Free Software Foundation.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, see <http://www.gnu.org/licenses/>
  17  *
  18  * Contributions after 2012-01-13 are licensed under the terms of the
  19  * GNU GPL, version 2 or (at your option) any later version.
  20  */
  21 #include "hw/hw.h"
  22 #include "hw/i386/pc.h"
  23 #include "hw/isa/apm.h"
  24 #include "hw/i2c/pm_smbus.h"
  25 #include "hw/pci/pci.h"
  26 #include "hw/acpi/acpi.h"
  27 #include "sysemu/sysemu.h"
  28 #include "qemu/range.h"
  29 #include "exec/ioport.h"
  30 #include "hw/nvram/fw_cfg.h"
  31 #include "exec/address-spaces.h"
  32 #include "hw/acpi/piix4.h"
  33 #include "hw/acpi/pcihp.h"
  34 #include "hw/acpi/cpu_hotplug.h"
  35 #include "hw/hotplug.h"
  36 #include "hw/mem/pc-dimm.h"
  37 #include "hw/acpi/memory_hotplug.h"
  38 #include "hw/acpi/acpi_dev_interface.h"
  39 #include "hw/xen/xen.h"
  40
  41 //#define DEBUG
  42
  43 #ifdef DEBUG
  44 # define PIIX4_DPRINTF(format, ...)     printf(format, ## __VA_ARGS__)
  45 #else
  46 # define PIIX4_DPRINTF(format, ...)     do { } while (0)
  47 #endif
  48
  49 #define GPE_BASE 0xafe0
  50 #define GPE_LEN 4
  51
  52 struct pci_status {
  53     uint32_t up; /* deprecated, maintained for migration compatibility */
  54     uint32_t down;
  55 };
  56
  57 typedef struct PIIX4PMState {
  58     /*< private >*/
  59     PCIDevice parent_obj;
  60     /*< public >*/
  61
  62     MemoryRegion io;
  63     uint32_t io_base;
  64
  65     MemoryRegion io_gpe;
  66     ACPIREGS ar;
  67
  68     APMState apm;
  69
  70     PMSMBus smb;
  71     uint32_t smb_io_base;
  72
  73     qemu_irq irq;
  74     qemu_irq smi_irq;
  75     int smm_enabled;
  76     Notifier machine_ready;
  77     Notifier powerdown_notifier;
  78
  79     AcpiPciHpState acpi_pci_hotplug;
  80     bool use_acpi_pci_hotplug;
  81
  82     uint8_t disable_s3;
  83     uint8_t disable_s4;
  84     uint8_t s4_val;
  85
  86     AcpiCpuHotplug gpe_cpu;
  87
  88     MemHotplugState acpi_memory_hotplug;
  89 } PIIX4PMState;
  90
  91 #define TYPE_PIIX4_PM "PIIX4_PM"
  92
  93 #define PIIX4_PM(obj) \
  94     OBJECT_CHECK(PIIX4PMState, (obj), TYPE_PIIX4_PM)
  95
  96 static void piix4_acpi_system_hot_add_init(MemoryRegion *parent,
  97                                            PCIBus *bus, PIIX4PMState *s);
  98
  99 #define ACPI_ENABLE 0xf1
 100 #define ACPI_DISABLE 0xf0
 101
 102 static void pm_tmr_timer(ACPIREGS *ar)
 103 {
 104     PIIX4PMState *s = container_of(ar, PIIX4PMState, ar);
 105     acpi_update_sci(&s->ar, s->irq);
 106 }
 107
 108 static void apm_ctrl_changed(uint32_t val, void *arg)
 109 {
 110     PIIX4PMState *s = arg;
 111     PCIDevice *d = PCI_DEVICE(s);
 112
 113     /* ACPI specs 3.0, 4.7.2.5 */
 114     acpi_pm1_cnt_update(&s->ar, val == ACPI_ENABLE, val == ACPI_DISABLE);
 115     if (val == ACPI_ENABLE || val == ACPI_DISABLE) {
 116         return;
 117     }
 118
 119     if (d->config[0x5b] & (1 << 1)) {
 120         if (s->smi_irq) {
 121             qemu_irq_raise(s->smi_irq);
 122         }
 123     }
 124 }
 125
 126 static void pm_io_space_update(PIIX4PMState *s)
 127 {
 128     PCIDevice *d = PCI_DEVICE(s);
 129
 130     s->io_base = le32_to_cpu(*(uint32_t *)(d->config + 0x40));
 131     s->io_base &= 0xffc0;
 132
 133     memory_region_transaction_begin();
 134     memory_region_set_enabled(&s->io, d->config[0x80] & 1);
 135     memory_region_set_address(&s->io, s->io_base);
 136     memory_region_transaction_commit();
 137 }
 138
 139 static void smbus_io_space_update(PIIX4PMState *s)
 140 {
 141     PCIDevice *d = PCI_DEVICE(s);
 142
 143     s->smb_io_base = le32_to_cpu(*(uint32_t *)(d->config + 0x90));
 144     s->smb_io_base &= 0xffc0;
 145
 146     memory_region_transaction_begin();
 147     memory_region_set_enabled(&s->smb.io, d->config[0xd2] & 1);
 148     memory_region_set_address(&s->smb.io, s->smb_io_base);
 149     memory_region_transaction_commit();
 150 }
 151
 152 static void pm_write_config(PCIDevice *d,
 153                             uint32_t address, uint32_t val, int len)
 154 {
 155     pci_default_write_config(d, address, val, len);
 156     if (range_covers_byte(address, len, 0x80) ||
 157         ranges_overlap(address, len, 0x40, 4)) {
 158         pm_io_space_update((PIIX4PMState *)d);
 159     }
 160     if (range_covers_byte(address, len, 0xd2) ||
 161         ranges_overlap(address, len, 0x90, 4)) {
 162         smbus_io_space_update((PIIX4PMState *)d);
 163     }
 164 }
 165
 166 static int vmstate_acpi_post_load(void *opaque, int version_id)
 167 {
 168     PIIX4PMState *s = opaque;
 169
 170     pm_io_space_update(s);
 171     return 0;
 172 }
 173
 174 #define VMSTATE_GPE_ARRAY(_field, _state)                            \
 175  {                                                                   \
 176      .name       = (stringify(_field)),                              \
 177      .version_id = 0,                                                \
 178      .info       = &vmstate_info_uint16,                             \
 179      .size       = sizeof(uint16_t),                                 \
 180      .flags      = VMS_SINGLE | VMS_POINTER,                         \
 181      .offset     = vmstate_offset_pointer(_state, _field, uint8_t),  \
 182  }
 183
 184 static const VMStateDescription vmstate_gpe = {
 185     .name = "gpe",
 186     .version_id = 1,
 187     .minimum_version_id = 1,
 188     .fields = (VMStateField[]) {
 189         VMSTATE_GPE_ARRAY(sts, ACPIGPE),
 190         VMSTATE_GPE_ARRAY(en, ACPIGPE),
 191         VMSTATE_END_OF_LIST()
 192     }
 193 };
 194
 195 static const VMStateDescription vmstate_pci_status = {
 196     .name = "pci_status",
 197     .version_id = 1,
 198     .minimum_version_id = 1,
 199     .fields = (VMStateField[]) {
 200         VMSTATE_UINT32(up, struct AcpiPciHpPciStatus),
 201         VMSTATE_UINT32(down, struct AcpiPciHpPciStatus),
 202         VMSTATE_END_OF_LIST()
 203     }
 204 };
 205
 206 static int acpi_load_old(QEMUFile *f, void *opaque, int version_id)
 207 {
 208     PIIX4PMState *s = opaque;
 209     int ret, i;
 210     uint16_t temp;
 211
 212     ret = pci_device_load(PCI_DEVICE(s), f);
 213     if (ret < 0) {
 214         return ret;
 215     }
 216     qemu_get_be16s(f, &s->ar.pm1.evt.sts);
 217     qemu_get_be16s(f, &s->ar.pm1.evt.en);
 218     qemu_get_be16s(f, &s->ar.pm1.cnt.cnt);
 219
 220     ret = vmstate_load_state(f, &vmstate_apm, &s->apm, 1);
 221     if (ret) {
 222         return ret;
 223     }
 224
 225     timer_get(f, s->ar.tmr.timer);
 226     qemu_get_sbe64s(f, &s->ar.tmr.overflow_time);
 227
 228     qemu_get_be16s(f, (uint16_t *)s->ar.gpe.sts);
 229     for (i = 0; i < 3; i++) {
 230         qemu_get_be16s(f, &temp);
 231     }
 232
 233     qemu_get_be16s(f, (uint16_t *)s->ar.gpe.en);
 234     for (i = 0; i < 3; i++) {
 235         qemu_get_be16s(f, &temp);
 236     }
 237
 238     ret = vmstate_load_state(f, &vmstate_pci_status,
 239         &s->acpi_pci_hotplug.acpi_pcihp_pci_status[ACPI_PCIHP_BSEL_DEFAULT], 1);
 240     return ret;
 241 }
 242
 243 static bool vmstate_test_use_acpi_pci_hotplug(void *opaque, int version_id)
 244 {
 245     PIIX4PMState *s = opaque;
 246     return s->use_acpi_pci_hotplug;
 247 }
 248
 249 static bool vmstate_test_no_use_acpi_pci_hotplug(void *opaque, int version_id)
 250 {
 251     PIIX4PMState *s = opaque;
 252     return !s->use_acpi_pci_hotplug;
 253 }
 254
 255 static bool vmstate_test_use_memhp(void *opaque)
 256 {
 257     PIIX4PMState *s = opaque;
 258     return s->acpi_memory_hotplug.is_enabled;
 259 }
 260
 261 static const VMStateDescription vmstate_memhp_state = {
 262     .name = "piix4_pm/memhp",
 263     .version_id = 1,
 264     .minimum_version_id = 1,
 265     .minimum_version_id_old = 1,
 266     .needed = vmstate_test_use_memhp,
 267     .fields      = (VMStateField[]) {
 268         VMSTATE_MEMORY_HOTPLUG(acpi_memory_hotplug, PIIX4PMState),
 269         VMSTATE_END_OF_LIST()
 270     }
 271 };
 272
 273 /* qemu-kvm 1.2 uses version 3 but advertised as 2
 274  * To support incoming qemu-kvm 1.2 migration, change version_id
 275  * and minimum_version_id to 2 below (which breaks migration from
 276  * qemu 1.2).
 277  *
 278  */
 279 static const VMStateDescription vmstate_acpi = {
 280     .name = "piix4_pm",
 281     .version_id = 3,
 282     .minimum_version_id = 3,
 283     .minimum_version_id_old = 1,
 284     .load_state_old = acpi_load_old,
 285     .post_load = vmstate_acpi_post_load,
 286     .fields = (VMStateField[]) {
 287         VMSTATE_PCI_DEVICE(parent_obj, PIIX4PMState),
 288         VMSTATE_UINT16(ar.pm1.evt.sts, PIIX4PMState),
 289         VMSTATE_UINT16(ar.pm1.evt.en, PIIX4PMState),
 290         VMSTATE_UINT16(ar.pm1.cnt.cnt, PIIX4PMState),
 291         VMSTATE_STRUCT(apm, PIIX4PMState, 0, vmstate_apm, APMState),
 292         VMSTATE_TIMER_PTR(ar.tmr.timer, PIIX4PMState),
 293         VMSTATE_INT64(ar.tmr.overflow_time, PIIX4PMState),
 294         VMSTATE_STRUCT(ar.gpe, PIIX4PMState, 2, vmstate_gpe, ACPIGPE),
 295         VMSTATE_STRUCT_TEST(
 296             acpi_pci_hotplug.acpi_pcihp_pci_status[ACPI_PCIHP_BSEL_DEFAULT],
 297             PIIX4PMState,
 298             vmstate_test_no_use_acpi_pci_hotplug,
 299             2, vmstate_pci_status,
 300             struct AcpiPciHpPciStatus),
 301         VMSTATE_PCI_HOTPLUG(acpi_pci_hotplug, PIIX4PMState,
 302                             vmstate_test_use_acpi_pci_hotplug),
 303         VMSTATE_END_OF_LIST()
 304     },
 305     .subsections = (const VMStateDescription*[]) {
 306          &vmstate_memhp_state,
 307          NULL
 308     }
 309 };
 310
 311 static void piix4_reset(void *opaque)
 312 {
 313     PIIX4PMState *s = opaque;
 314     PCIDevice *d = PCI_DEVICE(s);
 315     uint8_t *pci_conf = d->config;
 316
 317     pci_conf[0x58] = 0;
 318     pci_conf[0x59] = 0;
 319     pci_conf[0x5a] = 0;
 320     pci_conf[0x5b] = 0;
 321
 322     pci_conf[0x40] = 0x01; /* PM io base read only bit */
 323     pci_conf[0x80] = 0;
 324
 325     if (!s->smm_enabled) {
 326         /* Mark SMM as already inited (until KVM supports SMM). */
 327         pci_conf[0x5B] = 0x02;
 328     }
 329     pm_io_space_update(s);
 330     acpi_pcihp_reset(&s->acpi_pci_hotplug);
 331 }
 332
 333 static void piix4_pm_powerdown_req(Notifier *n, void *opaque)
 334 {
 335     PIIX4PMState *s = container_of(n, PIIX4PMState, powerdown_notifier);
 336
 337     assert(s != NULL);
 338     acpi_pm1_evt_power_down(&s->ar);
 339 }
 340
 341 static void piix4_device_plug_cb(HotplugHandler *hotplug_dev,
 342                                  DeviceState *dev, Error **errp)
 343 {
 344     PIIX4PMState *s = PIIX4_PM(hotplug_dev);
 345
 346     if (s->acpi_memory_hotplug.is_enabled &&
 347         object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) {
 348         acpi_memory_plug_cb(&s->ar, s->irq, &s->acpi_memory_hotplug, dev, errp);
 349     } else if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) {
 350         acpi_pcihp_device_plug_cb(&s->ar, s->irq, &s->acpi_pci_hotplug, dev,
 351                                   errp);
 352     } else if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
 353         acpi_cpu_plug_cb(&s->ar, s->irq, &s->gpe_cpu, dev, errp);
 354     } else {
 355         error_setg(errp, "acpi: device plug request for not supported device"
 356                    " type: %s", object_get_typename(OBJECT(dev)));
 357     }
 358 }
 359
 360 static void piix4_device_unplug_request_cb(HotplugHandler *hotplug_dev,
 361                                            DeviceState *dev, Error **errp)
 362 {
 363     PIIX4PMState *s = PIIX4_PM(hotplug_dev);
 364
 365     if (s->acpi_memory_hotplug.is_enabled &&
 366         object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) {
 367         acpi_memory_unplug_request_cb(&s->ar, s->irq, &s->acpi_memory_hotplug,
 368                                       dev, errp);
 369     } else if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) {
 370         acpi_pcihp_device_unplug_cb(&s->ar, s->irq, &s->acpi_pci_hotplug, dev,
 371                                     errp);
 372     } else {
 373         error_setg(errp, "acpi: device unplug request for not supported device"
 374                    " type: %s", object_get_typename(OBJECT(dev)));
 375     }
 376 }
 377
 378 static void piix4_device_unplug_cb(HotplugHandler *hotplug_dev,
 379                                    DeviceState *dev, Error **errp)
 380 {
 381     PIIX4PMState *s = PIIX4_PM(hotplug_dev);
 382
 383     if (s->acpi_memory_hotplug.is_enabled &&
 384         object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) {
 385         acpi_memory_unplug_cb(&s->acpi_memory_hotplug, dev, errp);
 386     } else {
 387         error_setg(errp, "acpi: device unplug for not supported device"
 388                    " type: %s", object_get_typename(OBJECT(dev)));
 389     }
 390 }
 391
 392 static void piix4_update_bus_hotplug(PCIBus *pci_bus, void *opaque)
 393 {
 394     PIIX4PMState *s = opaque;
 395
 396     qbus_set_hotplug_handler(BUS(pci_bus), DEVICE(s), &error_abort);
 397 }
 398
 399 static void piix4_pm_machine_ready(Notifier *n, void *opaque)
 400 {
 401     PIIX4PMState *s = container_of(n, PIIX4PMState, machine_ready);
 402     PCIDevice *d = PCI_DEVICE(s);
 403     MemoryRegion *io_as = pci_address_space_io(d);
 404     uint8_t *pci_conf;
 405
 406     pci_conf = d->config;
 407     pci_conf[0x5f] = 0x10 |
 408         (memory_region_present(io_as, 0x378) ? 0x80 : 0);
 409     pci_conf[0x63] = 0x60;
 410     pci_conf[0x67] = (memory_region_present(io_as, 0x3f8) ? 0x08 : 0) |
 411         (memory_region_present(io_as, 0x2f8) ? 0x90 : 0);
 412
 413     if (s->use_acpi_pci_hotplug) {
 414         pci_for_each_bus(d->bus, piix4_update_bus_hotplug, s);
 415     } else {
 416         piix4_update_bus_hotplug(d->bus, s);
 417     }
 418 }
 419
 420 static void piix4_pm_add_propeties(PIIX4PMState *s)
 421 {
 422     static const uint8_t acpi_enable_cmd = ACPI_ENABLE;
 423     static const uint8_t acpi_disable_cmd = ACPI_DISABLE;
 424     static const uint32_t gpe0_blk = GPE_BASE;
 425     static const uint32_t gpe0_blk_len = GPE_LEN;
 426     static const uint16_t sci_int = 9;
 427
 428     object_property_add_uint8_ptr(OBJECT(s), ACPI_PM_PROP_ACPI_ENABLE_CMD,
 429                                   &acpi_enable_cmd, NULL);
 430     object_property_add_uint8_ptr(OBJECT(s), ACPI_PM_PROP_ACPI_DISABLE_CMD,
 431                                   &acpi_disable_cmd, NULL);
 432     object_property_add_uint32_ptr(OBJECT(s), ACPI_PM_PROP_GPE0_BLK,
 433                                   &gpe0_blk, NULL);
 434     object_property_add_uint32_ptr(OBJECT(s), ACPI_PM_PROP_GPE0_BLK_LEN,
 435                                   &gpe0_blk_len, NULL);
 436     object_property_add_uint16_ptr(OBJECT(s), ACPI_PM_PROP_SCI_INT,
 437                                   &sci_int, NULL);
 438     object_property_add_uint32_ptr(OBJECT(s), ACPI_PM_PROP_PM_IO_BASE,
 439                                   &s->io_base, NULL);
 440 }
 441
 442 static void piix4_pm_realize(PCIDevice *dev, Error **errp)
 443 {
 444     PIIX4PMState *s = PIIX4_PM(dev);
 445     uint8_t *pci_conf;
 446
 447     pci_conf = dev->config;
 448     pci_conf[0x06] = 0x80;
 449     pci_conf[0x07] = 0x02;
 450     pci_conf[0x09] = 0x00;
 451     pci_conf[0x3d] = 0x01; // interrupt pin 1
 452
 453     /* APM */
 454     apm_init(dev, &s->apm, apm_ctrl_changed, s);
 455
 456     if (!s->smm_enabled) {
 457         /* Mark SMM as already inited to prevent SMM from running.  KVM does not
 458          * support SMM mode. */
 459         pci_conf[0x5B] = 0x02;
 460     }
 461
 462     /* XXX: which specification is used ? The i82731AB has different
 463        mappings */
 464     pci_conf[0x90] = s->smb_io_base | 1;
 465     pci_conf[0x91] = s->smb_io_base >> 8;
 466     pci_conf[0xd2] = 0x09;
 467     pm_smbus_init(DEVICE(dev), &s->smb);
 468     memory_region_set_enabled(&s->smb.io, pci_conf[0xd2] & 1);
 469     memory_region_add_subregion(pci_address_space_io(dev),
 470                                 s->smb_io_base, &s->smb.io);
 471
 472     memory_region_init(&s->io, OBJECT(s), "piix4-pm", 64);
 473     memory_region_set_enabled(&s->io, false);
 474     memory_region_add_subregion(pci_address_space_io(dev),
 475                                 0, &s->io);
 476
 477     acpi_pm_tmr_init(&s->ar, pm_tmr_timer, &s->io);
 478     acpi_pm1_evt_init(&s->ar, pm_tmr_timer, &s->io);
 479     acpi_pm1_cnt_init(&s->ar, &s->io, s->disable_s3, s->disable_s4, s->s4_val);
 480     acpi_gpe_init(&s->ar, GPE_LEN);
 481
 482     s->powerdown_notifier.notify = piix4_pm_powerdown_req;
 483     qemu_register_powerdown_notifier(&s->powerdown_notifier);
 484
 485     s->machine_ready.notify = piix4_pm_machine_ready;
 486     qemu_add_machine_init_done_notifier(&s->machine_ready);
 487     qemu_register_reset(piix4_reset, s);
 488
 489     piix4_acpi_system_hot_add_init(pci_address_space_io(dev), dev->bus, s);
 490
 491     piix4_pm_add_propeties(s);
 492 }
 493
 494 Object *piix4_pm_find(void)
 495 {
 496     bool ambig;
 497     Object *o = object_resolve_path_type("", TYPE_PIIX4_PM, &ambig);
 498
 499     if (ambig || !o) {
 500         return NULL;
 501     }
 502     return o;
 503 }
 504
 505 I2CBus *piix4_pm_init(PCIBus *bus, int devfn, uint32_t smb_io_base,
 506                       qemu_irq sci_irq, qemu_irq smi_irq,
 507                       int smm_enabled, DeviceState **piix4_pm)
 508 {
 509     DeviceState *dev;
 510     PIIX4PMState *s;
 511
 512     dev = DEVICE(pci_create(bus, devfn, TYPE_PIIX4_PM));
 513     qdev_prop_set_uint32(dev, "smb_io_base", smb_io_base);
 514     if (piix4_pm) {
 515         *piix4_pm = dev;
 516     }
 517
 518     s = PIIX4_PM(dev);
 519     s->irq = sci_irq;
 520     s->smi_irq = smi_irq;
 521     s->smm_enabled = smm_enabled;
 522     if (xen_enabled()) {
 523         s->use_acpi_pci_hotplug = false;
 524     }
 525
 526     qdev_init_nofail(dev);
 527
 528     return s->smb.smbus;
 529 }
 530
 531 static uint64_t gpe_readb(void *opaque, hwaddr addr, unsigned width)
 532 {
 533     PIIX4PMState *s = opaque;
 534     uint32_t val = acpi_gpe_ioport_readb(&s->ar, addr);
 535
 536     PIIX4_DPRINTF("gpe read %" HWADDR_PRIx " == %" PRIu32 "\n", addr, val);
 537     return val;
 538 }
 539
 540 static void gpe_writeb(void *opaque, hwaddr addr, uint64_t val,
 541                        unsigned width)
 542 {
 543     PIIX4PMState *s = opaque;
 544
 545     acpi_gpe_ioport_writeb(&s->ar, addr, val);
 546     acpi_update_sci(&s->ar, s->irq);
 547
 548     PIIX4_DPRINTF("gpe write %" HWADDR_PRIx " <== %" PRIu64 "\n", addr, val);
 549 }
 550
 551 static const MemoryRegionOps piix4_gpe_ops = {
 552     .read = gpe_readb,
 553     .write = gpe_writeb,
 554     .valid.min_access_size = 1,
 555     .valid.max_access_size = 4,
 556     .impl.min_access_size = 1,
 557     .impl.max_access_size = 1,
 558     .endianness = DEVICE_LITTLE_ENDIAN,
 559 };
 560
 561 static void piix4_acpi_system_hot_add_init(MemoryRegion *parent,
 562                                            PCIBus *bus, PIIX4PMState *s)
 563 {
 564     memory_region_init_io(&s->io_gpe, OBJECT(s), &piix4_gpe_ops, s,
 565                           "acpi-gpe0", GPE_LEN);
 566     memory_region_add_subregion(parent, GPE_BASE, &s->io_gpe);
 567
 568     acpi_pcihp_init(OBJECT(s), &s->acpi_pci_hotplug, bus, parent,
 569                     s->use_acpi_pci_hotplug);
 570
 571     acpi_cpu_hotplug_init(parent, OBJECT(s), &s->gpe_cpu,
 572                           PIIX4_CPU_HOTPLUG_IO_BASE);
 573
 574     if (s->acpi_memory_hotplug.is_enabled) {
 575         acpi_memory_hotplug_init(parent, OBJECT(s), &s->acpi_memory_hotplug);
 576     }
 577 }
 578
 579 static void piix4_ospm_status(AcpiDeviceIf *adev, ACPIOSTInfoList ***list)
 580 {
 581     PIIX4PMState *s = PIIX4_PM(adev);
 582
 583     acpi_memory_ospm_status(&s->acpi_memory_hotplug, list);
 584 }
 585
 586 static Property piix4_pm_properties[] = {
 587     DEFINE_PROP_UINT32("smb_io_base", PIIX4PMState, smb_io_base, 0),
 588     DEFINE_PROP_UINT8(ACPI_PM_PROP_S3_DISABLED, PIIX4PMState, disable_s3, 0),
 589     DEFINE_PROP_UINT8(ACPI_PM_PROP_S4_DISABLED, PIIX4PMState, disable_s4, 0),
 590     DEFINE_PROP_UINT8(ACPI_PM_PROP_S4_VAL, PIIX4PMState, s4_val, 2),
 591     DEFINE_PROP_BOOL("acpi-pci-hotplug-with-bridge-support", PIIX4PMState,
 592                      use_acpi_pci_hotplug, true),
 593     DEFINE_PROP_BOOL("memory-hotplug-support", PIIX4PMState,
 594                      acpi_memory_hotplug.is_enabled, true),
 595     DEFINE_PROP_END_OF_LIST(),
 596 };
 597
 598 static void piix4_pm_class_init(ObjectClass *klass, void *data)
 599 {
 600     DeviceClass *dc = DEVICE_CLASS(klass);
 601     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 602     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
 603     AcpiDeviceIfClass *adevc = ACPI_DEVICE_IF_CLASS(klass);
 604
 605     k->realize = piix4_pm_realize;
 606     k->config_write = pm_write_config;
 607     k->vendor_id = PCI_VENDOR_ID_INTEL;
 608     k->device_id = PCI_DEVICE_ID_INTEL_82371AB_3;
 609     k->revision = 0x03;
 610     k->class_id = PCI_CLASS_BRIDGE_OTHER;
 611     dc->desc = "PM";
 612     dc->vmsd = &vmstate_acpi;
 613     dc->props = piix4_pm_properties;
 614     /*
 615      * Reason: part of PIIX4 southbridge, needs to be wired up,
 616      * e.g. by mips_malta_init()
 617      */
 618     dc->cannot_instantiate_with_device_add_yet = true;
 619     dc->hotpluggable = false;
 620     hc->plug = piix4_device_plug_cb;
 621     hc->unplug_request = piix4_device_unplug_request_cb;
 622     hc->unplug = piix4_device_unplug_cb;
 623     adevc->ospm_status = piix4_ospm_status;
 624 }
 625
 626 static const TypeInfo piix4_pm_info = {
 627     .name          = TYPE_PIIX4_PM,
 628     .parent        = TYPE_PCI_DEVICE,
 629     .instance_size = sizeof(PIIX4PMState),
 630     .class_init    = piix4_pm_class_init,
 631     .interfaces = (InterfaceInfo[]) {
 632         { TYPE_HOTPLUG_HANDLER },
 633         { TYPE_ACPI_DEVICE_IF },
 634         { }
 635     }
 636 };
 637
 638 static void piix4_pm_register_types(void)
 639 {
 640     type_register_static(&piix4_pm_info);
 641 }
 642
 643 type_init(piix4_pm_register_types)