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 "qemu/osdep.h"
  22 #include "hw/hw.h"
  23 #include "hw/i386/pc.h"
  24 #include "hw/isa/apm.h"
  25 #include "hw/i2c/pm_smbus.h"
  26 #include "hw/pci/pci.h"
  27 #include "hw/acpi/acpi.h"
  28 #include "sysemu/sysemu.h"
  29 #include "qapi/error.h"
  30 #include "qemu/range.h"
  31 #include "exec/ioport.h"
  32 #include "hw/nvram/fw_cfg.h"
  33 #include "exec/address-spaces.h"
  34 #include "hw/acpi/piix4.h"
  35 #include "hw/acpi/pcihp.h"
  36 #include "hw/acpi/cpu_hotplug.h"
  37 #include "hw/acpi/cpu.h"
  38 #include "hw/hotplug.h"
  39 #include "hw/mem/pc-dimm.h"
  40 #include "hw/acpi/memory_hotplug.h"
  41 #include "hw/acpi/acpi_dev_interface.h"
  42 #include "hw/xen/xen.h"
  43 #include "qom/cpu.h"
  44
  45 //#define DEBUG
  46
  47 #ifdef DEBUG
  48 # define PIIX4_DPRINTF(format, ...)     printf(format, ## __VA_ARGS__)
  49 #else
  50 # define PIIX4_DPRINTF(format, ...)     do { } while (0)
  51 #endif
  52
  53 #define GPE_BASE 0xafe0
  54 #define GPE_LEN 4
  55
  56 struct pci_status {
  57     uint32_t up; /* deprecated, maintained for migration compatibility */
  58     uint32_t down;
  59 };
  60
  61 typedef struct PIIX4PMState {
  62     /*< private >*/
  63     PCIDevice parent_obj;
  64     /*< public >*/
  65
  66     MemoryRegion io;
  67     uint32_t io_base;
  68
  69     MemoryRegion io_gpe;
  70     ACPIREGS ar;
  71
  72     APMState apm;
  73
  74     PMSMBus smb;
  75     uint32_t smb_io_base;
  76
  77     qemu_irq irq;
  78     qemu_irq smi_irq;
  79     int smm_enabled;
  80     Notifier machine_ready;
  81     Notifier powerdown_notifier;
  82
  83     AcpiPciHpState acpi_pci_hotplug;
  84     bool use_acpi_pci_hotplug;
  85
  86     uint8_t disable_s3;
  87     uint8_t disable_s4;
  88     uint8_t s4_val;
  89
  90     bool cpu_hotplug_legacy;
  91     AcpiCpuHotplug gpe_cpu;
  92     CPUHotplugState cpuhp_state;
  93
  94     MemHotplugState acpi_memory_hotplug;
  95 } PIIX4PMState;
  96
  97 #define TYPE_PIIX4_PM "PIIX4_PM"
  98
  99 #define PIIX4_PM(obj) \
 100     OBJECT_CHECK(PIIX4PMState, (obj), TYPE_PIIX4_PM)
 101
 102 static void piix4_acpi_system_hot_add_init(MemoryRegion *parent,
 103                                            PCIBus *bus, PIIX4PMState *s);
 104
 105 #define ACPI_ENABLE 0xf1
 106 #define ACPI_DISABLE 0xf0
 107
 108 static void pm_tmr_timer(ACPIREGS *ar)
 109 {
 110     PIIX4PMState *s = container_of(ar, PIIX4PMState, ar);
 111     acpi_update_sci(&s->ar, s->irq);
 112 }
 113
 114 static void apm_ctrl_changed(uint32_t val, void *arg)
 115 {
 116     PIIX4PMState *s = arg;
 117     PCIDevice *d = PCI_DEVICE(s);
 118
 119     /* ACPI specs 3.0, 4.7.2.5 */
 120     acpi_pm1_cnt_update(&s->ar, val == ACPI_ENABLE, val == ACPI_DISABLE);
 121     if (val == ACPI_ENABLE || val == ACPI_DISABLE) {
 122         return;
 123     }
 124
 125     if (d->config[0x5b] & (1 << 1)) {
 126         if (s->smi_irq) {
 127             qemu_irq_raise(s->smi_irq);
 128         }
 129     }
 130 }
 131
 132 static void pm_io_space_update(PIIX4PMState *s)
 133 {
 134     PCIDevice *d = PCI_DEVICE(s);
 135
 136     s->io_base = le32_to_cpu(*(uint32_t *)(d->config + 0x40));
 137     s->io_base &= 0xffc0;
 138
 139     memory_region_transaction_begin();
 140     memory_region_set_enabled(&s->io, d->config[0x80] & 1);
 141     memory_region_set_address(&s->io, s->io_base);
 142     memory_region_transaction_commit();
 143 }
 144
 145 static void smbus_io_space_update(PIIX4PMState *s)
 146 {
 147     PCIDevice *d = PCI_DEVICE(s);
 148
 149     s->smb_io_base = le32_to_cpu(*(uint32_t *)(d->config + 0x90));
 150     s->smb_io_base &= 0xffc0;
 151
 152     memory_region_transaction_begin();
 153     memory_region_set_enabled(&s->smb.io, d->config[0xd2] & 1);
 154     memory_region_set_address(&s->smb.io, s->smb_io_base);
 155     memory_region_transaction_commit();
 156 }
 157
 158 static void pm_write_config(PCIDevice *d,
 159                             uint32_t address, uint32_t val, int len)
 160 {
 161     pci_default_write_config(d, address, val, len);
 162     if (range_covers_byte(address, len, 0x80) ||
 163         ranges_overlap(address, len, 0x40, 4)) {
 164         pm_io_space_update((PIIX4PMState *)d);
 165     }
 166     if (range_covers_byte(address, len, 0xd2) ||
 167         ranges_overlap(address, len, 0x90, 4)) {
 168         smbus_io_space_update((PIIX4PMState *)d);
 169     }
 170 }
 171
 172 static int vmstate_acpi_post_load(void *opaque, int version_id)
 173 {
 174     PIIX4PMState *s = opaque;
 175
 176     pm_io_space_update(s);
 177     return 0;
 178 }
 179
 180 #define VMSTATE_GPE_ARRAY(_field, _state)                            \
 181  {                                                                   \
 182      .name       = (stringify(_field)),                              \
 183      .version_id = 0,                                                \
 184      .info       = &vmstate_info_uint16,                             \
 185      .size       = sizeof(uint16_t),                                 \
 186      .flags      = VMS_SINGLE | VMS_POINTER,                         \
 187      .offset     = vmstate_offset_pointer(_state, _field, uint8_t),  \
 188  }
 189
 190 static const VMStateDescription vmstate_gpe = {
 191     .name = "gpe",
 192     .version_id = 1,
 193     .minimum_version_id = 1,
 194     .fields = (VMStateField[]) {
 195         VMSTATE_GPE_ARRAY(sts, ACPIGPE),
 196         VMSTATE_GPE_ARRAY(en, ACPIGPE),
 197         VMSTATE_END_OF_LIST()
 198     }
 199 };
 200
 201 static const VMStateDescription vmstate_pci_status = {
 202     .name = "pci_status",
 203     .version_id = 1,
 204     .minimum_version_id = 1,
 205     .fields = (VMStateField[]) {
 206         VMSTATE_UINT32(up, struct AcpiPciHpPciStatus),
 207         VMSTATE_UINT32(down, struct AcpiPciHpPciStatus),
 208         VMSTATE_END_OF_LIST()
 209     }
 210 };
 211
 212 static int acpi_load_old(QEMUFile *f, void *opaque, int version_id)
 213 {
 214     PIIX4PMState *s = opaque;
 215     int ret, i;
 216     uint16_t temp;
 217
 218     ret = pci_device_load(PCI_DEVICE(s), f);
 219     if (ret < 0) {
 220         return ret;
 221     }
 222     qemu_get_be16s(f, &s->ar.pm1.evt.sts);
 223     qemu_get_be16s(f, &s->ar.pm1.evt.en);
 224     qemu_get_be16s(f, &s->ar.pm1.cnt.cnt);
 225
 226     ret = vmstate_load_state(f, &vmstate_apm, &s->apm, 1);
 227     if (ret) {
 228         return ret;
 229     }
 230
 231     timer_get(f, s->ar.tmr.timer);
 232     qemu_get_sbe64s(f, &s->ar.tmr.overflow_time);
 233
 234     qemu_get_be16s(f, (uint16_t *)s->ar.gpe.sts);
 235     for (i = 0; i < 3; i++) {
 236         qemu_get_be16s(f, &temp);
 237     }
 238
 239     qemu_get_be16s(f, (uint16_t *)s->ar.gpe.en);
 240     for (i = 0; i < 3; i++) {
 241         qemu_get_be16s(f, &temp);
 242     }
 243
 244     ret = vmstate_load_state(f, &vmstate_pci_status,
 245         &s->acpi_pci_hotplug.acpi_pcihp_pci_status[ACPI_PCIHP_BSEL_DEFAULT], 1);
 246     return ret;
 247 }
 248
 249 static bool vmstate_test_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_no_use_acpi_pci_hotplug(void *opaque, int version_id)
 256 {
 257     PIIX4PMState *s = opaque;
 258     return !s->use_acpi_pci_hotplug;
 259 }
 260
 261 static bool vmstate_test_use_memhp(void *opaque)
 262 {
 263     PIIX4PMState *s = opaque;
 264     return s->acpi_memory_hotplug.is_enabled;
 265 }
 266
 267 static const VMStateDescription vmstate_memhp_state = {
 268     .name = "piix4_pm/memhp",
 269     .version_id = 1,
 270     .minimum_version_id = 1,
 271     .minimum_version_id_old = 1,
 272     .needed = vmstate_test_use_memhp,
 273     .fields      = (VMStateField[]) {
 274         VMSTATE_MEMORY_HOTPLUG(acpi_memory_hotplug, PIIX4PMState),
 275         VMSTATE_END_OF_LIST()
 276     }
 277 };
 278
 279 static bool vmstate_test_use_cpuhp(void *opaque)
 280 {
 281     PIIX4PMState *s = opaque;
 282     return !s->cpu_hotplug_legacy;
 283 }
 284
 285 static int vmstate_cpuhp_pre_load(void *opaque)
 286 {
 287     Object *obj = OBJECT(opaque);
 288     object_property_set_bool(obj, false, "cpu-hotplug-legacy", &error_abort);
 289     return 0;
 290 }
 291
 292 static const VMStateDescription vmstate_cpuhp_state = {
 293     .name = "piix4_pm/cpuhp",
 294     .version_id = 1,
 295     .minimum_version_id = 1,
 296     .minimum_version_id_old = 1,
 297     .needed = vmstate_test_use_cpuhp,
 298     .pre_load = vmstate_cpuhp_pre_load,
 299     .fields      = (VMStateField[]) {
 300         VMSTATE_CPU_HOTPLUG(cpuhp_state, PIIX4PMState),
 301         VMSTATE_END_OF_LIST()
 302     }
 303 };
 304
 305 /* qemu-kvm 1.2 uses version 3 but advertised as 2
 306  * To support incoming qemu-kvm 1.2 migration, change version_id
 307  * and minimum_version_id to 2 below (which breaks migration from
 308  * qemu 1.2).
 309  *
 310  */
 311 static const VMStateDescription vmstate_acpi = {
 312     .name = "piix4_pm",
 313     .version_id = 3,
 314     .minimum_version_id = 3,
 315     .minimum_version_id_old = 1,
 316     .load_state_old = acpi_load_old,
 317     .post_load = vmstate_acpi_post_load,
 318     .fields = (VMStateField[]) {
 319         VMSTATE_PCI_DEVICE(parent_obj, PIIX4PMState),
 320         VMSTATE_UINT16(ar.pm1.evt.sts, PIIX4PMState),
 321         VMSTATE_UINT16(ar.pm1.evt.en, PIIX4PMState),
 322         VMSTATE_UINT16(ar.pm1.cnt.cnt, PIIX4PMState),
 323         VMSTATE_STRUCT(apm, PIIX4PMState, 0, vmstate_apm, APMState),
 324         VMSTATE_TIMER_PTR(ar.tmr.timer, PIIX4PMState),
 325         VMSTATE_INT64(ar.tmr.overflow_time, PIIX4PMState),
 326         VMSTATE_STRUCT(ar.gpe, PIIX4PMState, 2, vmstate_gpe, ACPIGPE),
 327         VMSTATE_STRUCT_TEST(
 328             acpi_pci_hotplug.acpi_pcihp_pci_status[ACPI_PCIHP_BSEL_DEFAULT],
 329             PIIX4PMState,
 330             vmstate_test_no_use_acpi_pci_hotplug,
 331             2, vmstate_pci_status,
 332             struct AcpiPciHpPciStatus),
 333         VMSTATE_PCI_HOTPLUG(acpi_pci_hotplug, PIIX4PMState,
 334                             vmstate_test_use_acpi_pci_hotplug),
 335         VMSTATE_END_OF_LIST()
 336     },
 337     .subsections = (const VMStateDescription*[]) {
 338          &vmstate_memhp_state,
 339          &vmstate_cpuhp_state,
 340          NULL
 341     }
 342 };
 343
 344 static void piix4_reset(void *opaque)
 345 {
 346     PIIX4PMState *s = opaque;
 347     PCIDevice *d = PCI_DEVICE(s);
 348     uint8_t *pci_conf = d->config;
 349
 350     pci_conf[0x58] = 0;
 351     pci_conf[0x59] = 0;
 352     pci_conf[0x5a] = 0;
 353     pci_conf[0x5b] = 0;
 354
 355     pci_conf[0x40] = 0x01; /* PM io base read only bit */
 356     pci_conf[0x80] = 0;
 357
 358     if (!s->smm_enabled) {
 359         /* Mark SMM as already inited (until KVM supports SMM). */
 360         pci_conf[0x5B] = 0x02;
 361     }
 362     pm_io_space_update(s);
 363     acpi_pcihp_reset(&s->acpi_pci_hotplug);
 364 }
 365
 366 static void piix4_pm_powerdown_req(Notifier *n, void *opaque)
 367 {
 368     PIIX4PMState *s = container_of(n, PIIX4PMState, powerdown_notifier);
 369
 370     assert(s != NULL);
 371     acpi_pm1_evt_power_down(&s->ar);
 372 }
 373
 374 static void piix4_device_plug_cb(HotplugHandler *hotplug_dev,
 375                                  DeviceState *dev, Error **errp)
 376 {
 377     PIIX4PMState *s = PIIX4_PM(hotplug_dev);
 378
 379     if (s->acpi_memory_hotplug.is_enabled &&
 380         object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) {
 381         if (object_dynamic_cast(OBJECT(dev), TYPE_NVDIMM)) {
 382             nvdimm_acpi_plug_cb(hotplug_dev, dev);
 383         } else {
 384             acpi_memory_plug_cb(hotplug_dev, &s->acpi_memory_hotplug,
 385                                 dev, errp);
 386         }
 387     } else if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) {
 388         acpi_pcihp_device_plug_cb(hotplug_dev, &s->acpi_pci_hotplug, dev, errp);
 389     } else if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
 390         if (s->cpu_hotplug_legacy) {
 391             legacy_acpi_cpu_plug_cb(hotplug_dev, &s->gpe_cpu, dev, errp);
 392         } else {
 393             acpi_cpu_plug_cb(hotplug_dev, &s->cpuhp_state, dev, errp);
 394         }
 395     } else {
 396         error_setg(errp, "acpi: device plug request for not supported device"
 397                    " type: %s", object_get_typename(OBJECT(dev)));
 398     }
 399 }
 400
 401 static void piix4_device_unplug_request_cb(HotplugHandler *hotplug_dev,
 402                                            DeviceState *dev, Error **errp)
 403 {
 404     PIIX4PMState *s = PIIX4_PM(hotplug_dev);
 405
 406     if (s->acpi_memory_hotplug.is_enabled &&
 407         object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) {
 408         acpi_memory_unplug_request_cb(hotplug_dev, &s->acpi_memory_hotplug,
 409                                       dev, errp);
 410     } else if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) {
 411         acpi_pcihp_device_unplug_cb(hotplug_dev, &s->acpi_pci_hotplug, dev,
 412                                     errp);
 413     } else if (object_dynamic_cast(OBJECT(dev), TYPE_CPU) &&
 414                !s->cpu_hotplug_legacy) {
 415         acpi_cpu_unplug_request_cb(hotplug_dev, &s->cpuhp_state, dev, errp);
 416     } else {
 417         error_setg(errp, "acpi: device unplug request for not supported device"
 418                    " type: %s", object_get_typename(OBJECT(dev)));
 419     }
 420 }
 421
 422 static void piix4_device_unplug_cb(HotplugHandler *hotplug_dev,
 423                                    DeviceState *dev, Error **errp)
 424 {
 425     PIIX4PMState *s = PIIX4_PM(hotplug_dev);
 426
 427     if (s->acpi_memory_hotplug.is_enabled &&
 428         object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) {
 429         acpi_memory_unplug_cb(&s->acpi_memory_hotplug, dev, errp);
 430     } else if (object_dynamic_cast(OBJECT(dev), TYPE_CPU) &&
 431                !s->cpu_hotplug_legacy) {
 432         acpi_cpu_unplug_cb(&s->cpuhp_state, dev, errp);
 433     } else {
 434         error_setg(errp, "acpi: device unplug for not supported device"
 435                    " type: %s", object_get_typename(OBJECT(dev)));
 436     }
 437 }
 438
 439 static void piix4_update_bus_hotplug(PCIBus *pci_bus, void *opaque)
 440 {
 441     PIIX4PMState *s = opaque;
 442
 443     /* pci_bus cannot outlive PIIX4PMState, because /machine keeps it alive
 444      * and it's not hot-unpluggable */
 445     qbus_set_hotplug_handler(BUS(pci_bus), DEVICE(s), &error_abort);
 446 }
 447
 448 static void piix4_pm_machine_ready(Notifier *n, void *opaque)
 449 {
 450     PIIX4PMState *s = container_of(n, PIIX4PMState, machine_ready);
 451     PCIDevice *d = PCI_DEVICE(s);
 452     MemoryRegion *io_as = pci_address_space_io(d);
 453     uint8_t *pci_conf;
 454
 455     pci_conf = d->config;
 456     pci_conf[0x5f] = 0x10 |
 457         (memory_region_present(io_as, 0x378) ? 0x80 : 0);
 458     pci_conf[0x63] = 0x60;
 459     pci_conf[0x67] = (memory_region_present(io_as, 0x3f8) ? 0x08 : 0) |
 460         (memory_region_present(io_as, 0x2f8) ? 0x90 : 0);
 461
 462     if (s->use_acpi_pci_hotplug) {
 463         pci_for_each_bus(pci_get_bus(d), piix4_update_bus_hotplug, s);
 464     } else {
 465         piix4_update_bus_hotplug(pci_get_bus(d), s);
 466     }
 467 }
 468
 469 static void piix4_pm_add_propeties(PIIX4PMState *s)
 470 {
 471     static const uint8_t acpi_enable_cmd = ACPI_ENABLE;
 472     static const uint8_t acpi_disable_cmd = ACPI_DISABLE;
 473     static const uint32_t gpe0_blk = GPE_BASE;
 474     static const uint32_t gpe0_blk_len = GPE_LEN;
 475     static const uint16_t sci_int = 9;
 476
 477     object_property_add_uint8_ptr(OBJECT(s), ACPI_PM_PROP_ACPI_ENABLE_CMD,
 478                                   &acpi_enable_cmd, NULL);
 479     object_property_add_uint8_ptr(OBJECT(s), ACPI_PM_PROP_ACPI_DISABLE_CMD,
 480                                   &acpi_disable_cmd, NULL);
 481     object_property_add_uint32_ptr(OBJECT(s), ACPI_PM_PROP_GPE0_BLK,
 482                                   &gpe0_blk, NULL);
 483     object_property_add_uint32_ptr(OBJECT(s), ACPI_PM_PROP_GPE0_BLK_LEN,
 484                                   &gpe0_blk_len, NULL);
 485     object_property_add_uint16_ptr(OBJECT(s), ACPI_PM_PROP_SCI_INT,
 486                                   &sci_int, NULL);
 487     object_property_add_uint32_ptr(OBJECT(s), ACPI_PM_PROP_PM_IO_BASE,
 488                                   &s->io_base, NULL);
 489 }
 490
 491 static void piix4_pm_realize(PCIDevice *dev, Error **errp)
 492 {
 493     PIIX4PMState *s = PIIX4_PM(dev);
 494     uint8_t *pci_conf;
 495
 496     pci_conf = dev->config;
 497     pci_conf[0x06] = 0x80;
 498     pci_conf[0x07] = 0x02;
 499     pci_conf[0x09] = 0x00;
 500     pci_conf[0x3d] = 0x01; // interrupt pin 1
 501
 502     /* APM */
 503     apm_init(dev, &s->apm, apm_ctrl_changed, s);
 504
 505     if (!s->smm_enabled) {
 506         /* Mark SMM as already inited to prevent SMM from running.  KVM does not
 507          * support SMM mode. */
 508         pci_conf[0x5B] = 0x02;
 509     }
 510
 511     /* XXX: which specification is used ? The i82731AB has different
 512        mappings */
 513     pci_conf[0x90] = s->smb_io_base | 1;
 514     pci_conf[0x91] = s->smb_io_base >> 8;
 515     pci_conf[0xd2] = 0x09;
 516     pm_smbus_init(DEVICE(dev), &s->smb);
 517     memory_region_set_enabled(&s->smb.io, pci_conf[0xd2] & 1);
 518     memory_region_add_subregion(pci_address_space_io(dev),
 519                                 s->smb_io_base, &s->smb.io);
 520
 521     memory_region_init(&s->io, OBJECT(s), "piix4-pm", 64);
 522     memory_region_set_enabled(&s->io, false);
 523     memory_region_add_subregion(pci_address_space_io(dev),
 524                                 0, &s->io);
 525
 526     acpi_pm_tmr_init(&s->ar, pm_tmr_timer, &s->io);
 527     acpi_pm1_evt_init(&s->ar, pm_tmr_timer, &s->io);
 528     acpi_pm1_cnt_init(&s->ar, &s->io, s->disable_s3, s->disable_s4, s->s4_val);
 529     acpi_gpe_init(&s->ar, GPE_LEN);
 530
 531     s->powerdown_notifier.notify = piix4_pm_powerdown_req;
 532     qemu_register_powerdown_notifier(&s->powerdown_notifier);
 533
 534     s->machine_ready.notify = piix4_pm_machine_ready;
 535     qemu_add_machine_init_done_notifier(&s->machine_ready);
 536     qemu_register_reset(piix4_reset, s);
 537
 538     piix4_acpi_system_hot_add_init(pci_address_space_io(dev),
 539                                    pci_get_bus(dev), s);
 540
 541     piix4_pm_add_propeties(s);
 542 }
 543
 544 Object *piix4_pm_find(void)
 545 {
 546     bool ambig;
 547     Object *o = object_resolve_path_type("", TYPE_PIIX4_PM, &ambig);
 548
 549     if (ambig || !o) {
 550         return NULL;
 551     }
 552     return o;
 553 }
 554
 555 I2CBus *piix4_pm_init(PCIBus *bus, int devfn, uint32_t smb_io_base,
 556                       qemu_irq sci_irq, qemu_irq smi_irq,
 557                       int smm_enabled, DeviceState **piix4_pm)
 558 {
 559     DeviceState *dev;
 560     PIIX4PMState *s;
 561
 562     dev = DEVICE(pci_create(bus, devfn, TYPE_PIIX4_PM));
 563     qdev_prop_set_uint32(dev, "smb_io_base", smb_io_base);
 564     if (piix4_pm) {
 565         *piix4_pm = dev;
 566     }
 567
 568     s = PIIX4_PM(dev);
 569     s->irq = sci_irq;
 570     s->smi_irq = smi_irq;
 571     s->smm_enabled = smm_enabled;
 572     if (xen_enabled()) {
 573         s->use_acpi_pci_hotplug = false;
 574     }
 575
 576     qdev_init_nofail(dev);
 577
 578     return s->smb.smbus;
 579 }
 580
 581 static uint64_t gpe_readb(void *opaque, hwaddr addr, unsigned width)
 582 {
 583     PIIX4PMState *s = opaque;
 584     uint32_t val = acpi_gpe_ioport_readb(&s->ar, addr);
 585
 586     PIIX4_DPRINTF("gpe read %" HWADDR_PRIx " == %" PRIu32 "\n", addr, val);
 587     return val;
 588 }
 589
 590 static void gpe_writeb(void *opaque, hwaddr addr, uint64_t val,
 591                        unsigned width)
 592 {
 593     PIIX4PMState *s = opaque;
 594
 595     acpi_gpe_ioport_writeb(&s->ar, addr, val);
 596     acpi_update_sci(&s->ar, s->irq);
 597
 598     PIIX4_DPRINTF("gpe write %" HWADDR_PRIx " <== %" PRIu64 "\n", addr, val);
 599 }
 600
 601 static const MemoryRegionOps piix4_gpe_ops = {
 602     .read = gpe_readb,
 603     .write = gpe_writeb,
 604     .valid.min_access_size = 1,
 605     .valid.max_access_size = 4,
 606     .impl.min_access_size = 1,
 607     .impl.max_access_size = 1,
 608     .endianness = DEVICE_LITTLE_ENDIAN,
 609 };
 610
 611
 612 static bool piix4_get_cpu_hotplug_legacy(Object *obj, Error **errp)
 613 {
 614     PIIX4PMState *s = PIIX4_PM(obj);
 615
 616     return s->cpu_hotplug_legacy;
 617 }
 618
 619 static void piix4_set_cpu_hotplug_legacy(Object *obj, bool value, Error **errp)
 620 {
 621     PIIX4PMState *s = PIIX4_PM(obj);
 622
 623     assert(!value);
 624     if (s->cpu_hotplug_legacy && value == false) {
 625         acpi_switch_to_modern_cphp(&s->gpe_cpu, &s->cpuhp_state,
 626                                    PIIX4_CPU_HOTPLUG_IO_BASE);
 627     }
 628     s->cpu_hotplug_legacy = value;
 629 }
 630
 631 static void piix4_acpi_system_hot_add_init(MemoryRegion *parent,
 632                                            PCIBus *bus, PIIX4PMState *s)
 633 {
 634     memory_region_init_io(&s->io_gpe, OBJECT(s), &piix4_gpe_ops, s,
 635                           "acpi-gpe0", GPE_LEN);
 636     memory_region_add_subregion(parent, GPE_BASE, &s->io_gpe);
 637
 638     acpi_pcihp_init(OBJECT(s), &s->acpi_pci_hotplug, bus, parent,
 639                     s->use_acpi_pci_hotplug);
 640
 641     s->cpu_hotplug_legacy = true;
 642     object_property_add_bool(OBJECT(s), "cpu-hotplug-legacy",
 643                              piix4_get_cpu_hotplug_legacy,
 644                              piix4_set_cpu_hotplug_legacy,
 645                              NULL);
 646     legacy_acpi_cpu_hotplug_init(parent, OBJECT(s), &s->gpe_cpu,
 647                                  PIIX4_CPU_HOTPLUG_IO_BASE);
 648
 649     if (s->acpi_memory_hotplug.is_enabled) {
 650         acpi_memory_hotplug_init(parent, OBJECT(s), &s->acpi_memory_hotplug,
 651                                  ACPI_MEMORY_HOTPLUG_BASE);
 652     }
 653 }
 654
 655 static void piix4_ospm_status(AcpiDeviceIf *adev, ACPIOSTInfoList ***list)
 656 {
 657     PIIX4PMState *s = PIIX4_PM(adev);
 658
 659     acpi_memory_ospm_status(&s->acpi_memory_hotplug, list);
 660     if (!s->cpu_hotplug_legacy) {
 661         acpi_cpu_ospm_status(&s->cpuhp_state, list);
 662     }
 663 }
 664
 665 static void piix4_send_gpe(AcpiDeviceIf *adev, AcpiEventStatusBits ev)
 666 {
 667     PIIX4PMState *s = PIIX4_PM(adev);
 668
 669     acpi_send_gpe_event(&s->ar, s->irq, ev);
 670 }
 671
 672 static Property piix4_pm_properties[] = {
 673     DEFINE_PROP_UINT32("smb_io_base", PIIX4PMState, smb_io_base, 0),
 674     DEFINE_PROP_UINT8(ACPI_PM_PROP_S3_DISABLED, PIIX4PMState, disable_s3, 0),
 675     DEFINE_PROP_UINT8(ACPI_PM_PROP_S4_DISABLED, PIIX4PMState, disable_s4, 0),
 676     DEFINE_PROP_UINT8(ACPI_PM_PROP_S4_VAL, PIIX4PMState, s4_val, 2),
 677     DEFINE_PROP_BOOL("acpi-pci-hotplug-with-bridge-support", PIIX4PMState,
 678                      use_acpi_pci_hotplug, true),
 679     DEFINE_PROP_BOOL("memory-hotplug-support", PIIX4PMState,
 680                      acpi_memory_hotplug.is_enabled, true),
 681     DEFINE_PROP_END_OF_LIST(),
 682 };
 683
 684 static void piix4_pm_class_init(ObjectClass *klass, void *data)
 685 {
 686     DeviceClass *dc = DEVICE_CLASS(klass);
 687     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 688     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
 689     AcpiDeviceIfClass *adevc = ACPI_DEVICE_IF_CLASS(klass);
 690
 691     k->realize = piix4_pm_realize;
 692     k->config_write = pm_write_config;
 693     k->vendor_id = PCI_VENDOR_ID_INTEL;
 694     k->device_id = PCI_DEVICE_ID_INTEL_82371AB_3;
 695     k->revision = 0x03;
 696     k->class_id = PCI_CLASS_BRIDGE_OTHER;
 697     dc->desc = "PM";
 698     dc->vmsd = &vmstate_acpi;
 699     dc->props = piix4_pm_properties;
 700     /*
 701      * Reason: part of PIIX4 southbridge, needs to be wired up,
 702      * e.g. by mips_malta_init()
 703      */
 704     dc->user_creatable = false;
 705     dc->hotpluggable = false;
 706     hc->plug = piix4_device_plug_cb;
 707     hc->unplug_request = piix4_device_unplug_request_cb;
 708     hc->unplug = piix4_device_unplug_cb;
 709     adevc->ospm_status = piix4_ospm_status;
 710     adevc->send_event = piix4_send_gpe;
 711     adevc->madt_cpu = pc_madt_cpu_entry;
 712 }
 713
 714 static const TypeInfo piix4_pm_info = {
 715     .name          = TYPE_PIIX4_PM,
 716     .parent        = TYPE_PCI_DEVICE,
 717     .instance_size = sizeof(PIIX4PMState),
 718     .class_init    = piix4_pm_class_init,
 719     .interfaces = (InterfaceInfo[]) {
 720         { TYPE_HOTPLUG_HANDLER },
 721         { TYPE_ACPI_DEVICE_IF },
 722         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
 723         { }
 724     }
 725 };
 726
 727 static void piix4_pm_register_types(void)
 728 {
 729     type_register_static(&piix4_pm_info);
 730 }
 731
 732 type_init(piix4_pm_register_types)