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 "hw/nvram/fw_cfg.h"
  32 #include "exec/address-spaces.h"
  33 #include "hw/acpi/piix4.h"
  34 #include "hw/acpi/pcihp.h"
  35 #include "hw/acpi/cpu_hotplug.h"
  36 #include "hw/acpi/cpu.h"
  37 #include "hw/hotplug.h"
  38 #include "hw/mem/pc-dimm.h"
  39 #include "hw/acpi/memory_hotplug.h"
  40 #include "hw/acpi/acpi_dev_interface.h"
  41 #include "hw/xen/xen.h"
  42 #include "qom/cpu.h"
  43
  44 //#define DEBUG
  45
  46 #ifdef DEBUG
  47 # define PIIX4_DPRINTF(format, ...)     printf(format, ## __VA_ARGS__)
  48 #else
  49 # define PIIX4_DPRINTF(format, ...)     do { } while (0)
  50 #endif
  51
  52 #define GPE_BASE 0xafe0
  53 #define GPE_LEN 4
  54
  55 struct pci_status {
  56     uint32_t up; /* deprecated, maintained for migration compatibility */
  57     uint32_t down;
  58 };
  59
  60 typedef struct PIIX4PMState {
  61     /*< private >*/
  62     PCIDevice parent_obj;
  63     /*< public >*/
  64
  65     MemoryRegion io;
  66     uint32_t io_base;
  67
  68     MemoryRegion io_gpe;
  69     ACPIREGS ar;
  70
  71     APMState apm;
  72
  73     PMSMBus smb;
  74     uint32_t smb_io_base;
  75
  76     qemu_irq irq;
  77     qemu_irq smi_irq;
  78     int smm_enabled;
  79     Notifier machine_ready;
  80     Notifier powerdown_notifier;
  81
  82     AcpiPciHpState acpi_pci_hotplug;
  83     bool use_acpi_pci_hotplug;
  84
  85     uint8_t disable_s3;
  86     uint8_t disable_s4;
  87     uint8_t s4_val;
  88
  89     bool cpu_hotplug_legacy;
  90     AcpiCpuHotplug gpe_cpu;
  91     CPUHotplugState cpuhp_state;
  92
  93     MemHotplugState acpi_memory_hotplug;
  94 } PIIX4PMState;
  95
  96 #define TYPE_PIIX4_PM "PIIX4_PM"
  97
  98 #define PIIX4_PM(obj) \
  99     OBJECT_CHECK(PIIX4PMState, (obj), TYPE_PIIX4_PM)
 100
 101 static void piix4_acpi_system_hot_add_init(MemoryRegion *parent,
 102                                            PCIBus *bus, PIIX4PMState *s);
 103
 104 #define ACPI_ENABLE 0xf1
 105 #define ACPI_DISABLE 0xf0
 106
 107 static void pm_tmr_timer(ACPIREGS *ar)
 108 {
 109     PIIX4PMState *s = container_of(ar, PIIX4PMState, ar);
 110     acpi_update_sci(&s->ar, s->irq);
 111 }
 112
 113 static void apm_ctrl_changed(uint32_t val, void *arg)
 114 {
 115     PIIX4PMState *s = arg;
 116     PCIDevice *d = PCI_DEVICE(s);
 117
 118     /* ACPI specs 3.0, 4.7.2.5 */
 119     acpi_pm1_cnt_update(&s->ar, val == ACPI_ENABLE, val == ACPI_DISABLE);
 120     if (val == ACPI_ENABLE || val == ACPI_DISABLE) {
 121         return;
 122     }
 123
 124     if (d->config[0x5b] & (1 << 1)) {
 125         if (s->smi_irq) {
 126             qemu_irq_raise(s->smi_irq);
 127         }
 128     }
 129 }
 130
 131 static void pm_io_space_update(PIIX4PMState *s)
 132 {
 133     PCIDevice *d = PCI_DEVICE(s);
 134
 135     s->io_base = le32_to_cpu(*(uint32_t *)(d->config + 0x40));
 136     s->io_base &= 0xffc0;
 137
 138     memory_region_transaction_begin();
 139     memory_region_set_enabled(&s->io, d->config[0x80] & 1);
 140     memory_region_set_address(&s->io, s->io_base);
 141     memory_region_transaction_commit();
 142 }
 143
 144 static void smbus_io_space_update(PIIX4PMState *s)
 145 {
 146     PCIDevice *d = PCI_DEVICE(s);
 147
 148     s->smb_io_base = le32_to_cpu(*(uint32_t *)(d->config + 0x90));
 149     s->smb_io_base &= 0xffc0;
 150
 151     memory_region_transaction_begin();
 152     memory_region_set_enabled(&s->smb.io, d->config[0xd2] & 1);
 153     memory_region_set_address(&s->smb.io, s->smb_io_base);
 154     memory_region_transaction_commit();
 155 }
 156
 157 static void pm_write_config(PCIDevice *d,
 158                             uint32_t address, uint32_t val, int len)
 159 {
 160     pci_default_write_config(d, address, val, len);
 161     if (range_covers_byte(address, len, 0x80) ||
 162         ranges_overlap(address, len, 0x40, 4)) {
 163         pm_io_space_update((PIIX4PMState *)d);
 164     }
 165     if (range_covers_byte(address, len, 0xd2) ||
 166         ranges_overlap(address, len, 0x90, 4)) {
 167         smbus_io_space_update((PIIX4PMState *)d);
 168     }
 169 }
 170
 171 static int vmstate_acpi_post_load(void *opaque, int version_id)
 172 {
 173     PIIX4PMState *s = opaque;
 174
 175     pm_io_space_update(s);
 176     smbus_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 static bool piix4_vmstate_need_smbus(void *opaque, int version_id)
 306 {
 307     return pm_smbus_vmstate_needed();
 308 }
 309
 310 /* qemu-kvm 1.2 uses version 3 but advertised as 2
 311  * To support incoming qemu-kvm 1.2 migration, change version_id
 312  * and minimum_version_id to 2 below (which breaks migration from
 313  * qemu 1.2).
 314  *
 315  */
 316 static const VMStateDescription vmstate_acpi = {
 317     .name = "piix4_pm",
 318     .version_id = 3,
 319     .minimum_version_id = 3,
 320     .minimum_version_id_old = 1,
 321     .load_state_old = acpi_load_old,
 322     .post_load = vmstate_acpi_post_load,
 323     .fields = (VMStateField[]) {
 324         VMSTATE_PCI_DEVICE(parent_obj, PIIX4PMState),
 325         VMSTATE_UINT16(ar.pm1.evt.sts, PIIX4PMState),
 326         VMSTATE_UINT16(ar.pm1.evt.en, PIIX4PMState),
 327         VMSTATE_UINT16(ar.pm1.cnt.cnt, PIIX4PMState),
 328         VMSTATE_STRUCT(apm, PIIX4PMState, 0, vmstate_apm, APMState),
 329         VMSTATE_STRUCT_TEST(smb, PIIX4PMState, piix4_vmstate_need_smbus, 3,
 330                             pmsmb_vmstate, PMSMBus),
 331         VMSTATE_TIMER_PTR(ar.tmr.timer, PIIX4PMState),
 332         VMSTATE_INT64(ar.tmr.overflow_time, PIIX4PMState),
 333         VMSTATE_STRUCT(ar.gpe, PIIX4PMState, 2, vmstate_gpe, ACPIGPE),
 334         VMSTATE_STRUCT_TEST(
 335             acpi_pci_hotplug.acpi_pcihp_pci_status[ACPI_PCIHP_BSEL_DEFAULT],
 336             PIIX4PMState,
 337             vmstate_test_no_use_acpi_pci_hotplug,
 338             2, vmstate_pci_status,
 339             struct AcpiPciHpPciStatus),
 340         VMSTATE_PCI_HOTPLUG(acpi_pci_hotplug, PIIX4PMState,
 341                             vmstate_test_use_acpi_pci_hotplug),
 342         VMSTATE_END_OF_LIST()
 343     },
 344     .subsections = (const VMStateDescription*[]) {
 345          &vmstate_memhp_state,
 346          &vmstate_cpuhp_state,
 347          NULL
 348     }
 349 };
 350
 351 static void piix4_reset(void *opaque)
 352 {
 353     PIIX4PMState *s = opaque;
 354     PCIDevice *d = PCI_DEVICE(s);
 355     uint8_t *pci_conf = d->config;
 356
 357     pci_conf[0x58] = 0;
 358     pci_conf[0x59] = 0;
 359     pci_conf[0x5a] = 0;
 360     pci_conf[0x5b] = 0;
 361
 362     pci_conf[0x40] = 0x01; /* PM io base read only bit */
 363     pci_conf[0x80] = 0;
 364
 365     if (!s->smm_enabled) {
 366         /* Mark SMM as already inited (until KVM supports SMM). */
 367         pci_conf[0x5B] = 0x02;
 368     }
 369     pm_io_space_update(s);
 370     acpi_pcihp_reset(&s->acpi_pci_hotplug);
 371 }
 372
 373 static void piix4_pm_powerdown_req(Notifier *n, void *opaque)
 374 {
 375     PIIX4PMState *s = container_of(n, PIIX4PMState, powerdown_notifier);
 376
 377     assert(s != NULL);
 378     acpi_pm1_evt_power_down(&s->ar);
 379 }
 380
 381 static void piix4_device_pre_plug_cb(HotplugHandler *hotplug_dev,
 382                                     DeviceState *dev, Error **errp)
 383 {
 384     if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) {
 385         acpi_pcihp_device_pre_plug_cb(hotplug_dev, dev, errp);
 386     } else if (!object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM) &&
 387                !object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
 388         error_setg(errp, "acpi: device pre plug request for not supported"
 389                    " device type: %s", object_get_typename(OBJECT(dev)));
 390     }
 391 }
 392
 393 static void piix4_device_plug_cb(HotplugHandler *hotplug_dev,
 394                                  DeviceState *dev, Error **errp)
 395 {
 396     PIIX4PMState *s = PIIX4_PM(hotplug_dev);
 397
 398     if (s->acpi_memory_hotplug.is_enabled &&
 399         object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) {
 400         if (object_dynamic_cast(OBJECT(dev), TYPE_NVDIMM)) {
 401             nvdimm_acpi_plug_cb(hotplug_dev, dev);
 402         } else {
 403             acpi_memory_plug_cb(hotplug_dev, &s->acpi_memory_hotplug,
 404                                 dev, errp);
 405         }
 406     } else if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) {
 407         acpi_pcihp_device_plug_cb(hotplug_dev, &s->acpi_pci_hotplug, dev, errp);
 408     } else if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
 409         if (s->cpu_hotplug_legacy) {
 410             legacy_acpi_cpu_plug_cb(hotplug_dev, &s->gpe_cpu, dev, errp);
 411         } else {
 412             acpi_cpu_plug_cb(hotplug_dev, &s->cpuhp_state, dev, errp);
 413         }
 414     } else {
 415         g_assert_not_reached();
 416     }
 417 }
 418
 419 static void piix4_device_unplug_request_cb(HotplugHandler *hotplug_dev,
 420                                            DeviceState *dev, Error **errp)
 421 {
 422     PIIX4PMState *s = PIIX4_PM(hotplug_dev);
 423
 424     if (s->acpi_memory_hotplug.is_enabled &&
 425         object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) {
 426         acpi_memory_unplug_request_cb(hotplug_dev, &s->acpi_memory_hotplug,
 427                                       dev, errp);
 428     } else if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) {
 429         acpi_pcihp_device_unplug_request_cb(hotplug_dev, &s->acpi_pci_hotplug,
 430                                             dev, errp);
 431     } else if (object_dynamic_cast(OBJECT(dev), TYPE_CPU) &&
 432                !s->cpu_hotplug_legacy) {
 433         acpi_cpu_unplug_request_cb(hotplug_dev, &s->cpuhp_state, dev, errp);
 434     } else {
 435         error_setg(errp, "acpi: device unplug request for not supported device"
 436                    " type: %s", object_get_typename(OBJECT(dev)));
 437     }
 438 }
 439
 440 static void piix4_device_unplug_cb(HotplugHandler *hotplug_dev,
 441                                    DeviceState *dev, Error **errp)
 442 {
 443     PIIX4PMState *s = PIIX4_PM(hotplug_dev);
 444
 445     if (s->acpi_memory_hotplug.is_enabled &&
 446         object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) {
 447         acpi_memory_unplug_cb(&s->acpi_memory_hotplug, dev, errp);
 448     } else if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) {
 449         acpi_pcihp_device_unplug_cb(hotplug_dev, &s->acpi_pci_hotplug, dev,
 450                                     errp);
 451     } else if (object_dynamic_cast(OBJECT(dev), TYPE_CPU) &&
 452                !s->cpu_hotplug_legacy) {
 453         acpi_cpu_unplug_cb(&s->cpuhp_state, dev, errp);
 454     } else {
 455         error_setg(errp, "acpi: device unplug for not supported device"
 456                    " type: %s", object_get_typename(OBJECT(dev)));
 457     }
 458 }
 459
 460 static void piix4_pm_machine_ready(Notifier *n, void *opaque)
 461 {
 462     PIIX4PMState *s = container_of(n, PIIX4PMState, machine_ready);
 463     PCIDevice *d = PCI_DEVICE(s);
 464     MemoryRegion *io_as = pci_address_space_io(d);
 465     uint8_t *pci_conf;
 466
 467     pci_conf = d->config;
 468     pci_conf[0x5f] = 0x10 |
 469         (memory_region_present(io_as, 0x378) ? 0x80 : 0);
 470     pci_conf[0x63] = 0x60;
 471     pci_conf[0x67] = (memory_region_present(io_as, 0x3f8) ? 0x08 : 0) |
 472         (memory_region_present(io_as, 0x2f8) ? 0x90 : 0);
 473 }
 474
 475 static void piix4_pm_add_propeties(PIIX4PMState *s)
 476 {
 477     static const uint8_t acpi_enable_cmd = ACPI_ENABLE;
 478     static const uint8_t acpi_disable_cmd = ACPI_DISABLE;
 479     static const uint32_t gpe0_blk = GPE_BASE;
 480     static const uint32_t gpe0_blk_len = GPE_LEN;
 481     static const uint16_t sci_int = 9;
 482
 483     object_property_add_uint8_ptr(OBJECT(s), ACPI_PM_PROP_ACPI_ENABLE_CMD,
 484                                   &acpi_enable_cmd, NULL);
 485     object_property_add_uint8_ptr(OBJECT(s), ACPI_PM_PROP_ACPI_DISABLE_CMD,
 486                                   &acpi_disable_cmd, NULL);
 487     object_property_add_uint32_ptr(OBJECT(s), ACPI_PM_PROP_GPE0_BLK,
 488                                   &gpe0_blk, NULL);
 489     object_property_add_uint32_ptr(OBJECT(s), ACPI_PM_PROP_GPE0_BLK_LEN,
 490                                   &gpe0_blk_len, NULL);
 491     object_property_add_uint16_ptr(OBJECT(s), ACPI_PM_PROP_SCI_INT,
 492                                   &sci_int, NULL);
 493     object_property_add_uint32_ptr(OBJECT(s), ACPI_PM_PROP_PM_IO_BASE,
 494                                   &s->io_base, NULL);
 495 }
 496
 497 static void piix4_pm_realize(PCIDevice *dev, Error **errp)
 498 {
 499     PIIX4PMState *s = PIIX4_PM(dev);
 500     uint8_t *pci_conf;
 501
 502     pci_conf = dev->config;
 503     pci_conf[0x06] = 0x80;
 504     pci_conf[0x07] = 0x02;
 505     pci_conf[0x09] = 0x00;
 506     pci_conf[0x3d] = 0x01; // interrupt pin 1
 507
 508     /* APM */
 509     apm_init(dev, &s->apm, apm_ctrl_changed, s);
 510
 511     if (!s->smm_enabled) {
 512         /* Mark SMM as already inited to prevent SMM from running.  KVM does not
 513          * support SMM mode. */
 514         pci_conf[0x5B] = 0x02;
 515     }
 516
 517     /* XXX: which specification is used ? The i82731AB has different
 518        mappings */
 519     pci_conf[0x90] = s->smb_io_base | 1;
 520     pci_conf[0x91] = s->smb_io_base >> 8;
 521     pci_conf[0xd2] = 0x09;
 522     pm_smbus_init(DEVICE(dev), &s->smb, true);
 523     memory_region_set_enabled(&s->smb.io, pci_conf[0xd2] & 1);
 524     memory_region_add_subregion(pci_address_space_io(dev),
 525                                 s->smb_io_base, &s->smb.io);
 526
 527     memory_region_init(&s->io, OBJECT(s), "piix4-pm", 64);
 528     memory_region_set_enabled(&s->io, false);
 529     memory_region_add_subregion(pci_address_space_io(dev),
 530                                 0, &s->io);
 531
 532     acpi_pm_tmr_init(&s->ar, pm_tmr_timer, &s->io);
 533     acpi_pm1_evt_init(&s->ar, pm_tmr_timer, &s->io);
 534     acpi_pm1_cnt_init(&s->ar, &s->io, s->disable_s3, s->disable_s4, s->s4_val);
 535     acpi_gpe_init(&s->ar, GPE_LEN);
 536
 537     s->powerdown_notifier.notify = piix4_pm_powerdown_req;
 538     qemu_register_powerdown_notifier(&s->powerdown_notifier);
 539
 540     s->machine_ready.notify = piix4_pm_machine_ready;
 541     qemu_add_machine_init_done_notifier(&s->machine_ready);
 542     qemu_register_reset(piix4_reset, s);
 543
 544     piix4_acpi_system_hot_add_init(pci_address_space_io(dev),
 545                                    pci_get_bus(dev), s);
 546     qbus_set_hotplug_handler(BUS(pci_get_bus(dev)), OBJECT(s), &error_abort);
 547
 548     piix4_pm_add_propeties(s);
 549 }
 550
 551 Object *piix4_pm_find(void)
 552 {
 553     bool ambig;
 554     Object *o = object_resolve_path_type("", TYPE_PIIX4_PM, &ambig);
 555
 556     if (ambig || !o) {
 557         return NULL;
 558     }
 559     return o;
 560 }
 561
 562 I2CBus *piix4_pm_init(PCIBus *bus, int devfn, uint32_t smb_io_base,
 563                       qemu_irq sci_irq, qemu_irq smi_irq,
 564                       int smm_enabled, DeviceState **piix4_pm)
 565 {
 566     DeviceState *dev;
 567     PIIX4PMState *s;
 568
 569     dev = DEVICE(pci_create(bus, devfn, TYPE_PIIX4_PM));
 570     qdev_prop_set_uint32(dev, "smb_io_base", smb_io_base);
 571     if (piix4_pm) {
 572         *piix4_pm = dev;
 573     }
 574
 575     s = PIIX4_PM(dev);
 576     s->irq = sci_irq;
 577     s->smi_irq = smi_irq;
 578     s->smm_enabled = smm_enabled;
 579     if (xen_enabled()) {
 580         s->use_acpi_pci_hotplug = false;
 581     }
 582
 583     qdev_init_nofail(dev);
 584
 585     return s->smb.smbus;
 586 }
 587
 588 static uint64_t gpe_readb(void *opaque, hwaddr addr, unsigned width)
 589 {
 590     PIIX4PMState *s = opaque;
 591     uint32_t val = acpi_gpe_ioport_readb(&s->ar, addr);
 592
 593     PIIX4_DPRINTF("gpe read %" HWADDR_PRIx " == %" PRIu32 "\n", addr, val);
 594     return val;
 595 }
 596
 597 static void gpe_writeb(void *opaque, hwaddr addr, uint64_t val,
 598                        unsigned width)
 599 {
 600     PIIX4PMState *s = opaque;
 601
 602     acpi_gpe_ioport_writeb(&s->ar, addr, val);
 603     acpi_update_sci(&s->ar, s->irq);
 604
 605     PIIX4_DPRINTF("gpe write %" HWADDR_PRIx " <== %" PRIu64 "\n", addr, val);
 606 }
 607
 608 static const MemoryRegionOps piix4_gpe_ops = {
 609     .read = gpe_readb,
 610     .write = gpe_writeb,
 611     .valid.min_access_size = 1,
 612     .valid.max_access_size = 4,
 613     .impl.min_access_size = 1,
 614     .impl.max_access_size = 1,
 615     .endianness = DEVICE_LITTLE_ENDIAN,
 616 };
 617
 618
 619 static bool piix4_get_cpu_hotplug_legacy(Object *obj, Error **errp)
 620 {
 621     PIIX4PMState *s = PIIX4_PM(obj);
 622
 623     return s->cpu_hotplug_legacy;
 624 }
 625
 626 static void piix4_set_cpu_hotplug_legacy(Object *obj, bool value, Error **errp)
 627 {
 628     PIIX4PMState *s = PIIX4_PM(obj);
 629
 630     assert(!value);
 631     if (s->cpu_hotplug_legacy && value == false) {
 632         acpi_switch_to_modern_cphp(&s->gpe_cpu, &s->cpuhp_state,
 633                                    PIIX4_CPU_HOTPLUG_IO_BASE);
 634     }
 635     s->cpu_hotplug_legacy = value;
 636 }
 637
 638 static void piix4_acpi_system_hot_add_init(MemoryRegion *parent,
 639                                            PCIBus *bus, PIIX4PMState *s)
 640 {
 641     memory_region_init_io(&s->io_gpe, OBJECT(s), &piix4_gpe_ops, s,
 642                           "acpi-gpe0", GPE_LEN);
 643     memory_region_add_subregion(parent, GPE_BASE, &s->io_gpe);
 644
 645     acpi_pcihp_init(OBJECT(s), &s->acpi_pci_hotplug, bus, parent,
 646                     s->use_acpi_pci_hotplug);
 647
 648     s->cpu_hotplug_legacy = true;
 649     object_property_add_bool(OBJECT(s), "cpu-hotplug-legacy",
 650                              piix4_get_cpu_hotplug_legacy,
 651                              piix4_set_cpu_hotplug_legacy,
 652                              NULL);
 653     legacy_acpi_cpu_hotplug_init(parent, OBJECT(s), &s->gpe_cpu,
 654                                  PIIX4_CPU_HOTPLUG_IO_BASE);
 655
 656     if (s->acpi_memory_hotplug.is_enabled) {
 657         acpi_memory_hotplug_init(parent, OBJECT(s), &s->acpi_memory_hotplug,
 658                                  ACPI_MEMORY_HOTPLUG_BASE);
 659     }
 660 }
 661
 662 static void piix4_ospm_status(AcpiDeviceIf *adev, ACPIOSTInfoList ***list)
 663 {
 664     PIIX4PMState *s = PIIX4_PM(adev);
 665
 666     acpi_memory_ospm_status(&s->acpi_memory_hotplug, list);
 667     if (!s->cpu_hotplug_legacy) {
 668         acpi_cpu_ospm_status(&s->cpuhp_state, list);
 669     }
 670 }
 671
 672 static void piix4_send_gpe(AcpiDeviceIf *adev, AcpiEventStatusBits ev)
 673 {
 674     PIIX4PMState *s = PIIX4_PM(adev);
 675
 676     acpi_send_gpe_event(&s->ar, s->irq, ev);
 677 }
 678
 679 static Property piix4_pm_properties[] = {
 680     DEFINE_PROP_UINT32("smb_io_base", PIIX4PMState, smb_io_base, 0),
 681     DEFINE_PROP_UINT8(ACPI_PM_PROP_S3_DISABLED, PIIX4PMState, disable_s3, 0),
 682     DEFINE_PROP_UINT8(ACPI_PM_PROP_S4_DISABLED, PIIX4PMState, disable_s4, 0),
 683     DEFINE_PROP_UINT8(ACPI_PM_PROP_S4_VAL, PIIX4PMState, s4_val, 2),
 684     DEFINE_PROP_BOOL("acpi-pci-hotplug-with-bridge-support", PIIX4PMState,
 685                      use_acpi_pci_hotplug, true),
 686     DEFINE_PROP_BOOL("memory-hotplug-support", PIIX4PMState,
 687                      acpi_memory_hotplug.is_enabled, true),
 688     DEFINE_PROP_END_OF_LIST(),
 689 };
 690
 691 static void piix4_pm_class_init(ObjectClass *klass, void *data)
 692 {
 693     DeviceClass *dc = DEVICE_CLASS(klass);
 694     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 695     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
 696     AcpiDeviceIfClass *adevc = ACPI_DEVICE_IF_CLASS(klass);
 697
 698     k->realize = piix4_pm_realize;
 699     k->config_write = pm_write_config;
 700     k->vendor_id = PCI_VENDOR_ID_INTEL;
 701     k->device_id = PCI_DEVICE_ID_INTEL_82371AB_3;
 702     k->revision = 0x03;
 703     k->class_id = PCI_CLASS_BRIDGE_OTHER;
 704     dc->desc = "PM";
 705     dc->vmsd = &vmstate_acpi;
 706     dc->props = piix4_pm_properties;
 707     /*
 708      * Reason: part of PIIX4 southbridge, needs to be wired up,
 709      * e.g. by mips_malta_init()
 710      */
 711     dc->user_creatable = false;
 712     dc->hotpluggable = false;
 713     hc->pre_plug = piix4_device_pre_plug_cb;
 714     hc->plug = piix4_device_plug_cb;
 715     hc->unplug_request = piix4_device_unplug_request_cb;
 716     hc->unplug = piix4_device_unplug_cb;
 717     adevc->ospm_status = piix4_ospm_status;
 718     adevc->send_event = piix4_send_gpe;
 719     adevc->madt_cpu = pc_madt_cpu_entry;
 720 }
 721
 722 static const TypeInfo piix4_pm_info = {
 723     .name          = TYPE_PIIX4_PM,
 724     .parent        = TYPE_PCI_DEVICE,
 725     .instance_size = sizeof(PIIX4PMState),
 726     .class_init    = piix4_pm_class_init,
 727     .interfaces = (InterfaceInfo[]) {
 728         { TYPE_HOTPLUG_HANDLER },
 729         { TYPE_ACPI_DEVICE_IF },
 730         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
 731         { }
 732     }
 733 };
 734
 735 static void piix4_pm_register_types(void)
 736 {
 737     type_register_static(&piix4_pm_info);
 738 }
 739
 740 type_init(piix4_pm_register_types)