qemu/hw/acpi/piix4.c
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   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 2.1 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
  22#include "qemu/osdep.h"
  23#include "hw/i386/pc.h"
  24#include "hw/irq.h"
  25#include "hw/isa/apm.h"
  26#include "hw/i2c/pm_smbus.h"
  27#include "hw/pci/pci.h"
  28#include "hw/qdev-properties.h"
  29#include "hw/acpi/acpi.h"
  30#include "hw/acpi/pcihp.h"
  31#include "hw/acpi/piix4.h"
  32#include "sysemu/runstate.h"
  33#include "sysemu/sysemu.h"
  34#include "sysemu/xen.h"
  35#include "qapi/error.h"
  36#include "qemu/range.h"
  37#include "hw/acpi/cpu_hotplug.h"
  38#include "hw/acpi/cpu.h"
  39#include "hw/hotplug.h"
  40#include "hw/mem/pc-dimm.h"
  41#include "hw/mem/nvdimm.h"
  42#include "hw/acpi/memory_hotplug.h"
  43#include "hw/acpi/acpi_dev_interface.h"
  44#include "migration/vmstate.h"
  45#include "hw/core/cpu.h"
  46#include "trace.h"
  47#include "qom/object.h"
  48
  49#define GPE_BASE 0xafe0
  50#define GPE_LEN 4
  51
  52#define ACPI_PCIHP_ADDR_PIIX4 0xae00
  53
  54struct pci_status {
  55    uint32_t up; /* deprecated, maintained for migration compatibility */
  56    uint32_t down;
  57};
  58
  59static void piix4_acpi_system_hot_add_init(MemoryRegion *parent,
  60                                           PCIBus *bus, PIIX4PMState *s);
  61
  62#define ACPI_ENABLE 0xf1
  63#define ACPI_DISABLE 0xf0
  64
  65static void pm_tmr_timer(ACPIREGS *ar)
  66{
  67    PIIX4PMState *s = container_of(ar, PIIX4PMState, ar);
  68    acpi_update_sci(&s->ar, s->irq);
  69}
  70
  71static void apm_ctrl_changed(uint32_t val, void *arg)
  72{
  73    PIIX4PMState *s = arg;
  74    PCIDevice *d = PCI_DEVICE(s);
  75
  76    /* ACPI specs 3.0, 4.7.2.5 */
  77    acpi_pm1_cnt_update(&s->ar, val == ACPI_ENABLE, val == ACPI_DISABLE);
  78    if (val == ACPI_ENABLE || val == ACPI_DISABLE) {
  79        return;
  80    }
  81
  82    if (d->config[0x5b] & (1 << 1)) {
  83        if (s->smi_irq) {
  84            qemu_irq_raise(s->smi_irq);
  85        }
  86    }
  87}
  88
  89static void pm_io_space_update(PIIX4PMState *s)
  90{
  91    PCIDevice *d = PCI_DEVICE(s);
  92
  93    s->io_base = le32_to_cpu(*(uint32_t *)(d->config + 0x40));
  94    s->io_base &= 0xffc0;
  95
  96    memory_region_transaction_begin();
  97    memory_region_set_enabled(&s->io, d->config[0x80] & 1);
  98    memory_region_set_address(&s->io, s->io_base);
  99    memory_region_transaction_commit();
 100}
 101
 102static void smbus_io_space_update(PIIX4PMState *s)
 103{
 104    PCIDevice *d = PCI_DEVICE(s);
 105
 106    s->smb_io_base = le32_to_cpu(*(uint32_t *)(d->config + 0x90));
 107    s->smb_io_base &= 0xffc0;
 108
 109    memory_region_transaction_begin();
 110    memory_region_set_enabled(&s->smb.io, d->config[0xd2] & 1);
 111    memory_region_set_address(&s->smb.io, s->smb_io_base);
 112    memory_region_transaction_commit();
 113}
 114
 115static void pm_write_config(PCIDevice *d,
 116                            uint32_t address, uint32_t val, int len)
 117{
 118    pci_default_write_config(d, address, val, len);
 119    if (range_covers_byte(address, len, 0x80) ||
 120        ranges_overlap(address, len, 0x40, 4)) {
 121        pm_io_space_update((PIIX4PMState *)d);
 122    }
 123    if (range_covers_byte(address, len, 0xd2) ||
 124        ranges_overlap(address, len, 0x90, 4)) {
 125        smbus_io_space_update((PIIX4PMState *)d);
 126    }
 127}
 128
 129static int vmstate_acpi_post_load(void *opaque, int version_id)
 130{
 131    PIIX4PMState *s = opaque;
 132
 133    pm_io_space_update(s);
 134    smbus_io_space_update(s);
 135    return 0;
 136}
 137
 138#define VMSTATE_GPE_ARRAY(_field, _state)                            \
 139 {                                                                   \
 140     .name       = (stringify(_field)),                              \
 141     .version_id = 0,                                                \
 142     .info       = &vmstate_info_uint16,                             \
 143     .size       = sizeof(uint16_t),                                 \
 144     .flags      = VMS_SINGLE | VMS_POINTER,                         \
 145     .offset     = vmstate_offset_pointer(_state, _field, uint8_t),  \
 146 }
 147
 148static const VMStateDescription vmstate_gpe = {
 149    .name = "gpe",
 150    .version_id = 1,
 151    .minimum_version_id = 1,
 152    .fields = (VMStateField[]) {
 153        VMSTATE_GPE_ARRAY(sts, ACPIGPE),
 154        VMSTATE_GPE_ARRAY(en, ACPIGPE),
 155        VMSTATE_END_OF_LIST()
 156    }
 157};
 158
 159static const VMStateDescription vmstate_pci_status = {
 160    .name = "pci_status",
 161    .version_id = 1,
 162    .minimum_version_id = 1,
 163    .fields = (VMStateField[]) {
 164        VMSTATE_UINT32(up, struct AcpiPciHpPciStatus),
 165        VMSTATE_UINT32(down, struct AcpiPciHpPciStatus),
 166        VMSTATE_END_OF_LIST()
 167    }
 168};
 169
 170static bool vmstate_test_use_acpi_hotplug_bridge(void *opaque, int version_id)
 171{
 172    PIIX4PMState *s = opaque;
 173    return s->acpi_pci_hotplug.use_acpi_hotplug_bridge;
 174}
 175
 176static bool vmstate_test_no_use_acpi_hotplug_bridge(void *opaque,
 177                                                    int version_id)
 178{
 179    PIIX4PMState *s = opaque;
 180    return !s->acpi_pci_hotplug.use_acpi_hotplug_bridge;
 181}
 182
 183static bool vmstate_test_use_memhp(void *opaque)
 184{
 185    PIIX4PMState *s = opaque;
 186    return s->acpi_memory_hotplug.is_enabled;
 187}
 188
 189static const VMStateDescription vmstate_memhp_state = {
 190    .name = "piix4_pm/memhp",
 191    .version_id = 1,
 192    .minimum_version_id = 1,
 193    .needed = vmstate_test_use_memhp,
 194    .fields      = (VMStateField[]) {
 195        VMSTATE_MEMORY_HOTPLUG(acpi_memory_hotplug, PIIX4PMState),
 196        VMSTATE_END_OF_LIST()
 197    }
 198};
 199
 200static bool vmstate_test_use_cpuhp(void *opaque)
 201{
 202    PIIX4PMState *s = opaque;
 203    return !s->cpu_hotplug_legacy;
 204}
 205
 206static int vmstate_cpuhp_pre_load(void *opaque)
 207{
 208    Object *obj = OBJECT(opaque);
 209    object_property_set_bool(obj, "cpu-hotplug-legacy", false, &error_abort);
 210    return 0;
 211}
 212
 213static const VMStateDescription vmstate_cpuhp_state = {
 214    .name = "piix4_pm/cpuhp",
 215    .version_id = 1,
 216    .minimum_version_id = 1,
 217    .needed = vmstate_test_use_cpuhp,
 218    .pre_load = vmstate_cpuhp_pre_load,
 219    .fields      = (VMStateField[]) {
 220        VMSTATE_CPU_HOTPLUG(cpuhp_state, PIIX4PMState),
 221        VMSTATE_END_OF_LIST()
 222    }
 223};
 224
 225static bool piix4_vmstate_need_smbus(void *opaque, int version_id)
 226{
 227    return pm_smbus_vmstate_needed();
 228}
 229
 230/*
 231 * This is a fudge to turn off the acpi_index field,
 232 * whose test was always broken on piix4 with 6.2 and older machine types.
 233 */
 234static bool vmstate_test_migrate_acpi_index(void *opaque, int version_id)
 235{
 236    PIIX4PMState *s = PIIX4_PM(opaque);
 237    return s->acpi_pci_hotplug.use_acpi_hotplug_bridge &&
 238           !s->not_migrate_acpi_index;
 239}
 240
 241/* qemu-kvm 1.2 uses version 3 but advertised as 2
 242 * To support incoming qemu-kvm 1.2 migration, change version_id
 243 * and minimum_version_id to 2 below (which breaks migration from
 244 * qemu 1.2).
 245 *
 246 */
 247static const VMStateDescription vmstate_acpi = {
 248    .name = "piix4_pm",
 249    .version_id = 3,
 250    .minimum_version_id = 3,
 251    .post_load = vmstate_acpi_post_load,
 252    .fields = (VMStateField[]) {
 253        VMSTATE_PCI_DEVICE(parent_obj, PIIX4PMState),
 254        VMSTATE_UINT16(ar.pm1.evt.sts, PIIX4PMState),
 255        VMSTATE_UINT16(ar.pm1.evt.en, PIIX4PMState),
 256        VMSTATE_UINT16(ar.pm1.cnt.cnt, PIIX4PMState),
 257        VMSTATE_STRUCT(apm, PIIX4PMState, 0, vmstate_apm, APMState),
 258        VMSTATE_STRUCT_TEST(smb, PIIX4PMState, piix4_vmstate_need_smbus, 3,
 259                            pmsmb_vmstate, PMSMBus),
 260        VMSTATE_TIMER_PTR(ar.tmr.timer, PIIX4PMState),
 261        VMSTATE_INT64(ar.tmr.overflow_time, PIIX4PMState),
 262        VMSTATE_STRUCT(ar.gpe, PIIX4PMState, 2, vmstate_gpe, ACPIGPE),
 263        VMSTATE_STRUCT_TEST(
 264            acpi_pci_hotplug.acpi_pcihp_pci_status[ACPI_PCIHP_BSEL_DEFAULT],
 265            PIIX4PMState,
 266            vmstate_test_no_use_acpi_hotplug_bridge,
 267            2, vmstate_pci_status,
 268            struct AcpiPciHpPciStatus),
 269        VMSTATE_PCI_HOTPLUG(acpi_pci_hotplug, PIIX4PMState,
 270                            vmstate_test_use_acpi_hotplug_bridge,
 271                            vmstate_test_migrate_acpi_index),
 272        VMSTATE_END_OF_LIST()
 273    },
 274    .subsections = (const VMStateDescription*[]) {
 275         &vmstate_memhp_state,
 276         &vmstate_cpuhp_state,
 277         NULL
 278    }
 279};
 280
 281static void piix4_pm_reset(DeviceState *dev)
 282{
 283    PIIX4PMState *s = PIIX4_PM(dev);
 284    PCIDevice *d = PCI_DEVICE(s);
 285    uint8_t *pci_conf = d->config;
 286
 287    pci_conf[0x58] = 0;
 288    pci_conf[0x59] = 0;
 289    pci_conf[0x5a] = 0;
 290    pci_conf[0x5b] = 0;
 291
 292    pci_conf[0x40] = 0x01; /* PM io base read only bit */
 293    pci_conf[0x80] = 0;
 294
 295    if (!s->smm_enabled) {
 296        /* Mark SMM as already inited (until KVM supports SMM). */
 297        pci_conf[0x5B] = 0x02;
 298    }
 299
 300    acpi_pm1_evt_reset(&s->ar);
 301    acpi_pm1_cnt_reset(&s->ar);
 302    acpi_pm_tmr_reset(&s->ar);
 303    acpi_gpe_reset(&s->ar);
 304    acpi_update_sci(&s->ar, s->irq);
 305
 306    pm_io_space_update(s);
 307    if (s->acpi_pci_hotplug.use_acpi_hotplug_bridge ||
 308        s->acpi_pci_hotplug.use_acpi_root_pci_hotplug) {
 309        acpi_pcihp_reset(&s->acpi_pci_hotplug);
 310    }
 311}
 312
 313static void piix4_pm_powerdown_req(Notifier *n, void *opaque)
 314{
 315    PIIX4PMState *s = container_of(n, PIIX4PMState, powerdown_notifier);
 316
 317    assert(s != NULL);
 318    acpi_pm1_evt_power_down(&s->ar);
 319}
 320
 321static void piix4_device_pre_plug_cb(HotplugHandler *hotplug_dev,
 322                                    DeviceState *dev, Error **errp)
 323{
 324    PIIX4PMState *s = PIIX4_PM(hotplug_dev);
 325
 326    if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) {
 327        acpi_pcihp_device_pre_plug_cb(hotplug_dev, dev, errp);
 328    } else if (object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) {
 329        if (!s->acpi_memory_hotplug.is_enabled) {
 330            error_setg(errp,
 331                "memory hotplug is not enabled: %s.memory-hotplug-support "
 332                "is not set", object_get_typename(OBJECT(s)));
 333        }
 334    } else if (
 335               !object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
 336        error_setg(errp, "acpi: device pre plug request for not supported"
 337                   " device type: %s", object_get_typename(OBJECT(dev)));
 338    }
 339}
 340
 341static void piix4_device_plug_cb(HotplugHandler *hotplug_dev,
 342                                 DeviceState *dev, Error **errp)
 343{
 344    PIIX4PMState *s = PIIX4_PM(hotplug_dev);
 345
 346    if (object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) {
 347        if (object_dynamic_cast(OBJECT(dev), TYPE_NVDIMM)) {
 348            nvdimm_acpi_plug_cb(hotplug_dev, dev);
 349        } else {
 350            acpi_memory_plug_cb(hotplug_dev, &s->acpi_memory_hotplug,
 351                                dev, errp);
 352        }
 353    } else if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) {
 354        acpi_pcihp_device_plug_cb(hotplug_dev, &s->acpi_pci_hotplug, dev, errp);
 355    } else if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
 356        if (s->cpu_hotplug_legacy) {
 357            legacy_acpi_cpu_plug_cb(hotplug_dev, &s->gpe_cpu, dev, errp);
 358        } else {
 359            acpi_cpu_plug_cb(hotplug_dev, &s->cpuhp_state, dev, errp);
 360        }
 361    } else {
 362        g_assert_not_reached();
 363    }
 364}
 365
 366static void piix4_device_unplug_request_cb(HotplugHandler *hotplug_dev,
 367                                           DeviceState *dev, Error **errp)
 368{
 369    PIIX4PMState *s = PIIX4_PM(hotplug_dev);
 370
 371    if (s->acpi_memory_hotplug.is_enabled &&
 372        object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) {
 373        acpi_memory_unplug_request_cb(hotplug_dev, &s->acpi_memory_hotplug,
 374                                      dev, errp);
 375    } else if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) {
 376        acpi_pcihp_device_unplug_request_cb(hotplug_dev, &s->acpi_pci_hotplug,
 377                                            dev, errp);
 378    } else if (object_dynamic_cast(OBJECT(dev), TYPE_CPU) &&
 379               !s->cpu_hotplug_legacy) {
 380        acpi_cpu_unplug_request_cb(hotplug_dev, &s->cpuhp_state, dev, errp);
 381    } else {
 382        error_setg(errp, "acpi: device unplug request for not supported device"
 383                   " type: %s", object_get_typename(OBJECT(dev)));
 384    }
 385}
 386
 387static void piix4_device_unplug_cb(HotplugHandler *hotplug_dev,
 388                                   DeviceState *dev, Error **errp)
 389{
 390    PIIX4PMState *s = PIIX4_PM(hotplug_dev);
 391
 392    if (s->acpi_memory_hotplug.is_enabled &&
 393        object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) {
 394        acpi_memory_unplug_cb(&s->acpi_memory_hotplug, dev, errp);
 395    } else if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) {
 396        acpi_pcihp_device_unplug_cb(hotplug_dev, &s->acpi_pci_hotplug, dev,
 397                                    errp);
 398    } else if (object_dynamic_cast(OBJECT(dev), TYPE_CPU) &&
 399               !s->cpu_hotplug_legacy) {
 400        acpi_cpu_unplug_cb(&s->cpuhp_state, dev, errp);
 401    } else {
 402        error_setg(errp, "acpi: device unplug for not supported device"
 403                   " type: %s", object_get_typename(OBJECT(dev)));
 404    }
 405}
 406
 407static bool piix4_is_hotpluggable_bus(HotplugHandler *hotplug_dev,
 408                                      BusState *bus)
 409{
 410    PIIX4PMState *s = PIIX4_PM(hotplug_dev);
 411    return acpi_pcihp_is_hotpluggbale_bus(&s->acpi_pci_hotplug, bus);
 412}
 413
 414static void piix4_pm_machine_ready(Notifier *n, void *opaque)
 415{
 416    PIIX4PMState *s = container_of(n, PIIX4PMState, machine_ready);
 417    PCIDevice *d = PCI_DEVICE(s);
 418    MemoryRegion *io_as = pci_address_space_io(d);
 419    uint8_t *pci_conf;
 420
 421    pci_conf = d->config;
 422    pci_conf[0x5f] = 0x10 |
 423        (memory_region_present(io_as, 0x378) ? 0x80 : 0);
 424    pci_conf[0x63] = 0x60;
 425    pci_conf[0x67] = (memory_region_present(io_as, 0x3f8) ? 0x08 : 0) |
 426        (memory_region_present(io_as, 0x2f8) ? 0x90 : 0);
 427}
 428
 429static void piix4_pm_add_properties(PIIX4PMState *s)
 430{
 431    static const uint8_t acpi_enable_cmd = ACPI_ENABLE;
 432    static const uint8_t acpi_disable_cmd = ACPI_DISABLE;
 433    static const uint32_t gpe0_blk = GPE_BASE;
 434    static const uint32_t gpe0_blk_len = GPE_LEN;
 435    static const uint16_t sci_int = 9;
 436
 437    object_property_add_uint8_ptr(OBJECT(s), ACPI_PM_PROP_ACPI_ENABLE_CMD,
 438                                  &acpi_enable_cmd, OBJ_PROP_FLAG_READ);
 439    object_property_add_uint8_ptr(OBJECT(s), ACPI_PM_PROP_ACPI_DISABLE_CMD,
 440                                  &acpi_disable_cmd, OBJ_PROP_FLAG_READ);
 441    object_property_add_uint32_ptr(OBJECT(s), ACPI_PM_PROP_GPE0_BLK,
 442                                  &gpe0_blk, OBJ_PROP_FLAG_READ);
 443    object_property_add_uint32_ptr(OBJECT(s), ACPI_PM_PROP_GPE0_BLK_LEN,
 444                                  &gpe0_blk_len, OBJ_PROP_FLAG_READ);
 445    object_property_add_uint16_ptr(OBJECT(s), ACPI_PM_PROP_SCI_INT,
 446                                  &sci_int, OBJ_PROP_FLAG_READ);
 447    object_property_add_uint32_ptr(OBJECT(s), ACPI_PM_PROP_PM_IO_BASE,
 448                                  &s->io_base, OBJ_PROP_FLAG_READ);
 449}
 450
 451static void piix4_pm_realize(PCIDevice *dev, Error **errp)
 452{
 453    PIIX4PMState *s = PIIX4_PM(dev);
 454    uint8_t *pci_conf;
 455
 456    pci_conf = dev->config;
 457    pci_conf[0x06] = 0x80;
 458    pci_conf[0x07] = 0x02;
 459    pci_conf[0x09] = 0x00;
 460    pci_conf[0x3d] = 0x01; // interrupt pin 1
 461
 462    /* APM */
 463    apm_init(dev, &s->apm, apm_ctrl_changed, s);
 464
 465    if (!s->smm_enabled) {
 466        /* Mark SMM as already inited to prevent SMM from running.  KVM does not
 467         * support SMM mode. */
 468        pci_conf[0x5B] = 0x02;
 469    }
 470
 471    /* XXX: which specification is used ? The i82731AB has different
 472       mappings */
 473    pci_conf[0x90] = s->smb_io_base | 1;
 474    pci_conf[0x91] = s->smb_io_base >> 8;
 475    pci_conf[0xd2] = 0x09;
 476    pm_smbus_init(DEVICE(dev), &s->smb, true);
 477    memory_region_set_enabled(&s->smb.io, pci_conf[0xd2] & 1);
 478    memory_region_add_subregion(pci_address_space_io(dev),
 479                                s->smb_io_base, &s->smb.io);
 480
 481    memory_region_init(&s->io, OBJECT(s), "piix4-pm", 64);
 482    memory_region_set_enabled(&s->io, false);
 483    memory_region_add_subregion(pci_address_space_io(dev),
 484                                0, &s->io);
 485
 486    acpi_pm_tmr_init(&s->ar, pm_tmr_timer, &s->io);
 487    acpi_pm1_evt_init(&s->ar, pm_tmr_timer, &s->io);
 488    acpi_pm1_cnt_init(&s->ar, &s->io, s->disable_s3, s->disable_s4, s->s4_val,
 489                      !s->smm_compat && !s->smm_enabled);
 490    acpi_gpe_init(&s->ar, GPE_LEN);
 491
 492    s->powerdown_notifier.notify = piix4_pm_powerdown_req;
 493    qemu_register_powerdown_notifier(&s->powerdown_notifier);
 494
 495    s->machine_ready.notify = piix4_pm_machine_ready;
 496    qemu_add_machine_init_done_notifier(&s->machine_ready);
 497
 498    if (xen_enabled()) {
 499        s->acpi_pci_hotplug.use_acpi_hotplug_bridge = false;
 500    }
 501
 502    piix4_acpi_system_hot_add_init(pci_address_space_io(dev),
 503                                   pci_get_bus(dev), s);
 504
 505    piix4_pm_add_properties(s);
 506}
 507
 508static void piix4_pm_init(Object *obj)
 509{
 510    PIIX4PMState *s = PIIX4_PM(obj);
 511
 512    qdev_init_gpio_out(DEVICE(obj), &s->irq, 1);
 513    qdev_init_gpio_out_named(DEVICE(obj), &s->smi_irq, "smi-irq", 1);
 514}
 515
 516static uint64_t gpe_readb(void *opaque, hwaddr addr, unsigned width)
 517{
 518    PIIX4PMState *s = opaque;
 519    uint32_t val = acpi_gpe_ioport_readb(&s->ar, addr);
 520
 521    trace_piix4_gpe_readb(addr, width, val);
 522    return val;
 523}
 524
 525static void gpe_writeb(void *opaque, hwaddr addr, uint64_t val,
 526                       unsigned width)
 527{
 528    PIIX4PMState *s = opaque;
 529
 530    trace_piix4_gpe_writeb(addr, width, val);
 531    acpi_gpe_ioport_writeb(&s->ar, addr, val);
 532    acpi_update_sci(&s->ar, s->irq);
 533}
 534
 535static const MemoryRegionOps piix4_gpe_ops = {
 536    .read = gpe_readb,
 537    .write = gpe_writeb,
 538    .valid.min_access_size = 1,
 539    .valid.max_access_size = 4,
 540    .impl.min_access_size = 1,
 541    .impl.max_access_size = 1,
 542    .endianness = DEVICE_LITTLE_ENDIAN,
 543};
 544
 545
 546static bool piix4_get_cpu_hotplug_legacy(Object *obj, Error **errp)
 547{
 548    PIIX4PMState *s = PIIX4_PM(obj);
 549
 550    return s->cpu_hotplug_legacy;
 551}
 552
 553static void piix4_set_cpu_hotplug_legacy(Object *obj, bool value, Error **errp)
 554{
 555    PIIX4PMState *s = PIIX4_PM(obj);
 556
 557    assert(!value);
 558    if (s->cpu_hotplug_legacy && value == false) {
 559        acpi_switch_to_modern_cphp(&s->gpe_cpu, &s->cpuhp_state,
 560                                   PIIX4_CPU_HOTPLUG_IO_BASE);
 561    }
 562    s->cpu_hotplug_legacy = value;
 563}
 564
 565static void piix4_acpi_system_hot_add_init(MemoryRegion *parent,
 566                                           PCIBus *bus, PIIX4PMState *s)
 567{
 568    memory_region_init_io(&s->io_gpe, OBJECT(s), &piix4_gpe_ops, s,
 569                          "acpi-gpe0", GPE_LEN);
 570    memory_region_add_subregion(parent, GPE_BASE, &s->io_gpe);
 571
 572    if (s->acpi_pci_hotplug.use_acpi_hotplug_bridge ||
 573        s->acpi_pci_hotplug.use_acpi_root_pci_hotplug) {
 574        acpi_pcihp_init(OBJECT(s), &s->acpi_pci_hotplug, bus, parent,
 575                        ACPI_PCIHP_ADDR_PIIX4);
 576        qbus_set_hotplug_handler(BUS(pci_get_bus(PCI_DEVICE(s))), OBJECT(s));
 577    }
 578
 579    s->cpu_hotplug_legacy = true;
 580    object_property_add_bool(OBJECT(s), "cpu-hotplug-legacy",
 581                             piix4_get_cpu_hotplug_legacy,
 582                             piix4_set_cpu_hotplug_legacy);
 583    legacy_acpi_cpu_hotplug_init(parent, OBJECT(s), &s->gpe_cpu,
 584                                 PIIX4_CPU_HOTPLUG_IO_BASE);
 585
 586    if (s->acpi_memory_hotplug.is_enabled) {
 587        acpi_memory_hotplug_init(parent, OBJECT(s), &s->acpi_memory_hotplug,
 588                                 ACPI_MEMORY_HOTPLUG_BASE);
 589    }
 590}
 591
 592static void piix4_ospm_status(AcpiDeviceIf *adev, ACPIOSTInfoList ***list)
 593{
 594    PIIX4PMState *s = PIIX4_PM(adev);
 595
 596    acpi_memory_ospm_status(&s->acpi_memory_hotplug, list);
 597    if (!s->cpu_hotplug_legacy) {
 598        acpi_cpu_ospm_status(&s->cpuhp_state, list);
 599    }
 600}
 601
 602static void piix4_send_gpe(AcpiDeviceIf *adev, AcpiEventStatusBits ev)
 603{
 604    PIIX4PMState *s = PIIX4_PM(adev);
 605
 606    acpi_send_gpe_event(&s->ar, s->irq, ev);
 607}
 608
 609static Property piix4_pm_properties[] = {
 610    DEFINE_PROP_UINT32("smb_io_base", PIIX4PMState, smb_io_base, 0),
 611    DEFINE_PROP_UINT8(ACPI_PM_PROP_S3_DISABLED, PIIX4PMState, disable_s3, 0),
 612    DEFINE_PROP_UINT8(ACPI_PM_PROP_S4_DISABLED, PIIX4PMState, disable_s4, 0),
 613    DEFINE_PROP_UINT8(ACPI_PM_PROP_S4_VAL, PIIX4PMState, s4_val, 2),
 614    DEFINE_PROP_BOOL(ACPI_PM_PROP_ACPI_PCIHP_BRIDGE, PIIX4PMState,
 615                     acpi_pci_hotplug.use_acpi_hotplug_bridge, true),
 616    DEFINE_PROP_BOOL(ACPI_PM_PROP_ACPI_PCI_ROOTHP, PIIX4PMState,
 617                     acpi_pci_hotplug.use_acpi_root_pci_hotplug, true),
 618    DEFINE_PROP_BOOL("memory-hotplug-support", PIIX4PMState,
 619                     acpi_memory_hotplug.is_enabled, true),
 620    DEFINE_PROP_BOOL("smm-compat", PIIX4PMState, smm_compat, false),
 621    DEFINE_PROP_BOOL("smm-enabled", PIIX4PMState, smm_enabled, false),
 622    DEFINE_PROP_BOOL("x-not-migrate-acpi-index", PIIX4PMState,
 623                      not_migrate_acpi_index, false),
 624    DEFINE_PROP_END_OF_LIST(),
 625};
 626
 627static void piix4_pm_class_init(ObjectClass *klass, void *data)
 628{
 629    DeviceClass *dc = DEVICE_CLASS(klass);
 630    PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 631    HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
 632    AcpiDeviceIfClass *adevc = ACPI_DEVICE_IF_CLASS(klass);
 633
 634    k->realize = piix4_pm_realize;
 635    k->config_write = pm_write_config;
 636    k->vendor_id = PCI_VENDOR_ID_INTEL;
 637    k->device_id = PCI_DEVICE_ID_INTEL_82371AB_3;
 638    k->revision = 0x03;
 639    k->class_id = PCI_CLASS_BRIDGE_OTHER;
 640    dc->reset = piix4_pm_reset;
 641    dc->desc = "PM";
 642    dc->vmsd = &vmstate_acpi;
 643    device_class_set_props(dc, piix4_pm_properties);
 644    /*
 645     * Reason: part of PIIX4 southbridge, needs to be wired up,
 646     * e.g. by mips_malta_init()
 647     */
 648    dc->user_creatable = false;
 649    dc->hotpluggable = false;
 650    hc->pre_plug = piix4_device_pre_plug_cb;
 651    hc->plug = piix4_device_plug_cb;
 652    hc->unplug_request = piix4_device_unplug_request_cb;
 653    hc->unplug = piix4_device_unplug_cb;
 654    hc->is_hotpluggable_bus = piix4_is_hotpluggable_bus;
 655    adevc->ospm_status = piix4_ospm_status;
 656    adevc->send_event = piix4_send_gpe;
 657    adevc->madt_cpu = pc_madt_cpu_entry;
 658}
 659
 660static const TypeInfo piix4_pm_info = {
 661    .name          = TYPE_PIIX4_PM,
 662    .parent        = TYPE_PCI_DEVICE,
 663    .instance_init  = piix4_pm_init,
 664    .instance_size = sizeof(PIIX4PMState),
 665    .class_init    = piix4_pm_class_init,
 666    .interfaces = (InterfaceInfo[]) {
 667        { TYPE_HOTPLUG_HANDLER },
 668        { TYPE_ACPI_DEVICE_IF },
 669        { INTERFACE_CONVENTIONAL_PCI_DEVICE },
 670        { }
 671    }
 672};
 673
 674static void piix4_pm_register_types(void)
 675{
 676    type_register_static(&piix4_pm_info);
 677}
 678
 679type_init(piix4_pm_register_types)
 680