1 /* 2 * ACPI implementation 3 * 4 * Copyright (c) 2006 Fabrice Bellard 5 * Copyright (c) 2009 Isaku Yamahata <yamahata at valinux co jp> 6 * VA Linux Systems Japan K.K. 7 * Copyright (C) 2012 Jason Baron <jbaron@redhat.com> 8 * 9 * This is based on acpi.c. 10 * 11 * This library is free software; you can redistribute it and/or 12 * modify it under the terms of the GNU Lesser General Public 13 * License version 2.1 as published by the Free Software Foundation. 14 * 15 * This library is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18 * Lesser General Public License for more details. 19 * 20 * You should have received a copy of the GNU Lesser General Public 21 * License along with this library; if not, see <http://www.gnu.org/licenses/> 22 * 23 * Contributions after 2012-01-13 are licensed under the terms of the 24 * GNU GPL, version 2 or (at your option) any later version. 25 */ 26 27 #include "qemu/osdep.h" 28 #include "qapi/error.h" 29 #include "qapi/visitor.h" 30 #include "hw/pci/pci.h" 31 #include "migration/vmstate.h" 32 #include "qemu/timer.h" 33 #include "hw/core/cpu.h" 34 #include "sysemu/reset.h" 35 #include "sysemu/runstate.h" 36 #include "hw/acpi/acpi.h" 37 #include "hw/acpi/tco.h" 38 #include "exec/address-spaces.h" 39 40 #include "hw/i386/ich9.h" 41 #include "hw/mem/pc-dimm.h" 42 #include "hw/mem/nvdimm.h" 43 44 //#define DEBUG 45 46 #ifdef DEBUG 47 #define ICH9_DEBUG(fmt, ...) \ 48 do { printf("%s "fmt, __func__, ## __VA_ARGS__); } while (0) 49 #else 50 #define ICH9_DEBUG(fmt, ...) do { } while (0) 51 #endif 52 53 static void ich9_pm_update_sci_fn(ACPIREGS *regs) 54 { 55 ICH9LPCPMRegs *pm = container_of(regs, ICH9LPCPMRegs, acpi_regs); 56 acpi_update_sci(&pm->acpi_regs, pm->irq); 57 } 58 59 static uint64_t ich9_gpe_readb(void *opaque, hwaddr addr, unsigned width) 60 { 61 ICH9LPCPMRegs *pm = opaque; 62 return acpi_gpe_ioport_readb(&pm->acpi_regs, addr); 63 } 64 65 static void ich9_gpe_writeb(void *opaque, hwaddr addr, uint64_t val, 66 unsigned width) 67 { 68 ICH9LPCPMRegs *pm = opaque; 69 acpi_gpe_ioport_writeb(&pm->acpi_regs, addr, val); 70 acpi_update_sci(&pm->acpi_regs, pm->irq); 71 } 72 73 static const MemoryRegionOps ich9_gpe_ops = { 74 .read = ich9_gpe_readb, 75 .write = ich9_gpe_writeb, 76 .valid.min_access_size = 1, 77 .valid.max_access_size = 4, 78 .impl.min_access_size = 1, 79 .impl.max_access_size = 1, 80 .endianness = DEVICE_LITTLE_ENDIAN, 81 }; 82 83 static uint64_t ich9_smi_readl(void *opaque, hwaddr addr, unsigned width) 84 { 85 ICH9LPCPMRegs *pm = opaque; 86 switch (addr) { 87 case 0: 88 return pm->smi_en; 89 case 4: 90 return pm->smi_sts; 91 default: 92 return 0; 93 } 94 } 95 96 static void ich9_smi_writel(void *opaque, hwaddr addr, uint64_t val, 97 unsigned width) 98 { 99 ICH9LPCPMRegs *pm = opaque; 100 TCOIORegs *tr = &pm->tco_regs; 101 uint64_t tco_en; 102 103 switch (addr) { 104 case 0: 105 tco_en = pm->smi_en & ICH9_PMIO_SMI_EN_TCO_EN; 106 /* once TCO_LOCK bit is set, TCO_EN bit cannot be overwritten */ 107 if (tr->tco.cnt1 & TCO_LOCK) { 108 val = (val & ~ICH9_PMIO_SMI_EN_TCO_EN) | tco_en; 109 } 110 pm->smi_en &= ~pm->smi_en_wmask; 111 pm->smi_en |= (val & pm->smi_en_wmask); 112 break; 113 } 114 } 115 116 static const MemoryRegionOps ich9_smi_ops = { 117 .read = ich9_smi_readl, 118 .write = ich9_smi_writel, 119 .valid.min_access_size = 4, 120 .valid.max_access_size = 4, 121 .endianness = DEVICE_LITTLE_ENDIAN, 122 }; 123 124 void ich9_pm_iospace_update(ICH9LPCPMRegs *pm, uint32_t pm_io_base) 125 { 126 ICH9_DEBUG("to 0x%x\n", pm_io_base); 127 128 assert((pm_io_base & ICH9_PMIO_MASK) == 0); 129 130 pm->pm_io_base = pm_io_base; 131 memory_region_transaction_begin(); 132 memory_region_set_enabled(&pm->io, pm->pm_io_base != 0); 133 memory_region_set_address(&pm->io, pm->pm_io_base); 134 memory_region_transaction_commit(); 135 } 136 137 static int ich9_pm_post_load(void *opaque, int version_id) 138 { 139 ICH9LPCPMRegs *pm = opaque; 140 uint32_t pm_io_base = pm->pm_io_base; 141 pm->pm_io_base = 0; 142 ich9_pm_iospace_update(pm, pm_io_base); 143 return 0; 144 } 145 146 #define VMSTATE_GPE_ARRAY(_field, _state) \ 147 { \ 148 .name = (stringify(_field)), \ 149 .version_id = 0, \ 150 .num = ICH9_PMIO_GPE0_LEN, \ 151 .info = &vmstate_info_uint8, \ 152 .size = sizeof(uint8_t), \ 153 .flags = VMS_ARRAY | VMS_POINTER, \ 154 .offset = vmstate_offset_pointer(_state, _field, uint8_t), \ 155 } 156 157 static bool vmstate_test_use_memhp(void *opaque) 158 { 159 ICH9LPCPMRegs *s = opaque; 160 return s->acpi_memory_hotplug.is_enabled; 161 } 162 163 static const VMStateDescription vmstate_memhp_state = { 164 .name = "ich9_pm/memhp", 165 .version_id = 1, 166 .minimum_version_id = 1, 167 .minimum_version_id_old = 1, 168 .needed = vmstate_test_use_memhp, 169 .fields = (VMStateField[]) { 170 VMSTATE_MEMORY_HOTPLUG(acpi_memory_hotplug, ICH9LPCPMRegs), 171 VMSTATE_END_OF_LIST() 172 } 173 }; 174 175 static bool vmstate_test_use_tco(void *opaque) 176 { 177 ICH9LPCPMRegs *s = opaque; 178 return s->enable_tco; 179 } 180 181 static const VMStateDescription vmstate_tco_io_state = { 182 .name = "ich9_pm/tco", 183 .version_id = 1, 184 .minimum_version_id = 1, 185 .minimum_version_id_old = 1, 186 .needed = vmstate_test_use_tco, 187 .fields = (VMStateField[]) { 188 VMSTATE_STRUCT(tco_regs, ICH9LPCPMRegs, 1, vmstate_tco_io_sts, 189 TCOIORegs), 190 VMSTATE_END_OF_LIST() 191 } 192 }; 193 194 static bool vmstate_test_use_cpuhp(void *opaque) 195 { 196 ICH9LPCPMRegs *s = opaque; 197 return !s->cpu_hotplug_legacy; 198 } 199 200 static int vmstate_cpuhp_pre_load(void *opaque) 201 { 202 ICH9LPCPMRegs *s = opaque; 203 Object *obj = OBJECT(s->gpe_cpu.device); 204 object_property_set_bool(obj, "cpu-hotplug-legacy", false, &error_abort); 205 return 0; 206 } 207 208 static const VMStateDescription vmstate_cpuhp_state = { 209 .name = "ich9_pm/cpuhp", 210 .version_id = 1, 211 .minimum_version_id = 1, 212 .minimum_version_id_old = 1, 213 .needed = vmstate_test_use_cpuhp, 214 .pre_load = vmstate_cpuhp_pre_load, 215 .fields = (VMStateField[]) { 216 VMSTATE_CPU_HOTPLUG(cpuhp_state, ICH9LPCPMRegs), 217 VMSTATE_END_OF_LIST() 218 } 219 }; 220 221 const VMStateDescription vmstate_ich9_pm = { 222 .name = "ich9_pm", 223 .version_id = 1, 224 .minimum_version_id = 1, 225 .post_load = ich9_pm_post_load, 226 .fields = (VMStateField[]) { 227 VMSTATE_UINT16(acpi_regs.pm1.evt.sts, ICH9LPCPMRegs), 228 VMSTATE_UINT16(acpi_regs.pm1.evt.en, ICH9LPCPMRegs), 229 VMSTATE_UINT16(acpi_regs.pm1.cnt.cnt, ICH9LPCPMRegs), 230 VMSTATE_TIMER_PTR(acpi_regs.tmr.timer, ICH9LPCPMRegs), 231 VMSTATE_INT64(acpi_regs.tmr.overflow_time, ICH9LPCPMRegs), 232 VMSTATE_GPE_ARRAY(acpi_regs.gpe.sts, ICH9LPCPMRegs), 233 VMSTATE_GPE_ARRAY(acpi_regs.gpe.en, ICH9LPCPMRegs), 234 VMSTATE_UINT32(smi_en, ICH9LPCPMRegs), 235 VMSTATE_UINT32(smi_sts, ICH9LPCPMRegs), 236 VMSTATE_END_OF_LIST() 237 }, 238 .subsections = (const VMStateDescription*[]) { 239 &vmstate_memhp_state, 240 &vmstate_tco_io_state, 241 &vmstate_cpuhp_state, 242 NULL 243 } 244 }; 245 246 static void pm_reset(void *opaque) 247 { 248 ICH9LPCPMRegs *pm = opaque; 249 ich9_pm_iospace_update(pm, 0); 250 251 acpi_pm1_evt_reset(&pm->acpi_regs); 252 acpi_pm1_cnt_reset(&pm->acpi_regs); 253 acpi_pm_tmr_reset(&pm->acpi_regs); 254 acpi_gpe_reset(&pm->acpi_regs); 255 256 pm->smi_en = 0; 257 if (!pm->smm_enabled) { 258 /* Mark SMM as already inited to prevent SMM from running. */ 259 pm->smi_en |= ICH9_PMIO_SMI_EN_APMC_EN; 260 } 261 pm->smi_en_wmask = ~0; 262 263 acpi_update_sci(&pm->acpi_regs, pm->irq); 264 } 265 266 static void pm_powerdown_req(Notifier *n, void *opaque) 267 { 268 ICH9LPCPMRegs *pm = container_of(n, ICH9LPCPMRegs, powerdown_notifier); 269 270 acpi_pm1_evt_power_down(&pm->acpi_regs); 271 } 272 273 void ich9_pm_init(PCIDevice *lpc_pci, ICH9LPCPMRegs *pm, 274 bool smm_enabled, 275 qemu_irq sci_irq) 276 { 277 memory_region_init(&pm->io, OBJECT(lpc_pci), "ich9-pm", ICH9_PMIO_SIZE); 278 memory_region_set_enabled(&pm->io, false); 279 memory_region_add_subregion(pci_address_space_io(lpc_pci), 280 0, &pm->io); 281 282 acpi_pm_tmr_init(&pm->acpi_regs, ich9_pm_update_sci_fn, &pm->io); 283 acpi_pm1_evt_init(&pm->acpi_regs, ich9_pm_update_sci_fn, &pm->io); 284 acpi_pm1_cnt_init(&pm->acpi_regs, &pm->io, pm->disable_s3, pm->disable_s4, 285 pm->s4_val); 286 287 acpi_gpe_init(&pm->acpi_regs, ICH9_PMIO_GPE0_LEN); 288 memory_region_init_io(&pm->io_gpe, OBJECT(lpc_pci), &ich9_gpe_ops, pm, 289 "acpi-gpe0", ICH9_PMIO_GPE0_LEN); 290 memory_region_add_subregion(&pm->io, ICH9_PMIO_GPE0_STS, &pm->io_gpe); 291 292 memory_region_init_io(&pm->io_smi, OBJECT(lpc_pci), &ich9_smi_ops, pm, 293 "acpi-smi", 8); 294 memory_region_add_subregion(&pm->io, ICH9_PMIO_SMI_EN, &pm->io_smi); 295 296 pm->smm_enabled = smm_enabled; 297 298 pm->enable_tco = true; 299 acpi_pm_tco_init(&pm->tco_regs, &pm->io); 300 301 pm->irq = sci_irq; 302 qemu_register_reset(pm_reset, pm); 303 pm->powerdown_notifier.notify = pm_powerdown_req; 304 qemu_register_powerdown_notifier(&pm->powerdown_notifier); 305 306 legacy_acpi_cpu_hotplug_init(pci_address_space_io(lpc_pci), 307 OBJECT(lpc_pci), &pm->gpe_cpu, ICH9_CPU_HOTPLUG_IO_BASE); 308 309 if (pm->acpi_memory_hotplug.is_enabled) { 310 acpi_memory_hotplug_init(pci_address_space_io(lpc_pci), OBJECT(lpc_pci), 311 &pm->acpi_memory_hotplug, 312 ACPI_MEMORY_HOTPLUG_BASE); 313 } 314 } 315 316 static void ich9_pm_get_gpe0_blk(Object *obj, Visitor *v, const char *name, 317 void *opaque, Error **errp) 318 { 319 ICH9LPCPMRegs *pm = opaque; 320 uint32_t value = pm->pm_io_base + ICH9_PMIO_GPE0_STS; 321 322 visit_type_uint32(v, name, &value, errp); 323 } 324 325 static bool ich9_pm_get_memory_hotplug_support(Object *obj, Error **errp) 326 { 327 ICH9LPCState *s = ICH9_LPC_DEVICE(obj); 328 329 return s->pm.acpi_memory_hotplug.is_enabled; 330 } 331 332 static void ich9_pm_set_memory_hotplug_support(Object *obj, bool value, 333 Error **errp) 334 { 335 ICH9LPCState *s = ICH9_LPC_DEVICE(obj); 336 337 s->pm.acpi_memory_hotplug.is_enabled = value; 338 } 339 340 static bool ich9_pm_get_cpu_hotplug_legacy(Object *obj, Error **errp) 341 { 342 ICH9LPCState *s = ICH9_LPC_DEVICE(obj); 343 344 return s->pm.cpu_hotplug_legacy; 345 } 346 347 static void ich9_pm_set_cpu_hotplug_legacy(Object *obj, bool value, 348 Error **errp) 349 { 350 ICH9LPCState *s = ICH9_LPC_DEVICE(obj); 351 352 assert(!value); 353 if (s->pm.cpu_hotplug_legacy && value == false) { 354 acpi_switch_to_modern_cphp(&s->pm.gpe_cpu, &s->pm.cpuhp_state, 355 ICH9_CPU_HOTPLUG_IO_BASE); 356 } 357 s->pm.cpu_hotplug_legacy = value; 358 } 359 360 static bool ich9_pm_get_enable_tco(Object *obj, Error **errp) 361 { 362 ICH9LPCState *s = ICH9_LPC_DEVICE(obj); 363 return s->pm.enable_tco; 364 } 365 366 static void ich9_pm_set_enable_tco(Object *obj, bool value, Error **errp) 367 { 368 ICH9LPCState *s = ICH9_LPC_DEVICE(obj); 369 s->pm.enable_tco = value; 370 } 371 372 void ich9_pm_add_properties(Object *obj, ICH9LPCPMRegs *pm) 373 { 374 static const uint32_t gpe0_len = ICH9_PMIO_GPE0_LEN; 375 pm->acpi_memory_hotplug.is_enabled = true; 376 pm->cpu_hotplug_legacy = true; 377 pm->disable_s3 = 0; 378 pm->disable_s4 = 0; 379 pm->s4_val = 2; 380 381 object_property_add_uint32_ptr(obj, ACPI_PM_PROP_PM_IO_BASE, 382 &pm->pm_io_base, OBJ_PROP_FLAG_READ); 383 object_property_add(obj, ACPI_PM_PROP_GPE0_BLK, "uint32", 384 ich9_pm_get_gpe0_blk, 385 NULL, NULL, pm); 386 object_property_add_uint32_ptr(obj, ACPI_PM_PROP_GPE0_BLK_LEN, 387 &gpe0_len, OBJ_PROP_FLAG_READ); 388 object_property_add_bool(obj, "memory-hotplug-support", 389 ich9_pm_get_memory_hotplug_support, 390 ich9_pm_set_memory_hotplug_support); 391 object_property_add_bool(obj, "cpu-hotplug-legacy", 392 ich9_pm_get_cpu_hotplug_legacy, 393 ich9_pm_set_cpu_hotplug_legacy); 394 object_property_add_uint8_ptr(obj, ACPI_PM_PROP_S3_DISABLED, 395 &pm->disable_s3, OBJ_PROP_FLAG_READWRITE); 396 object_property_add_uint8_ptr(obj, ACPI_PM_PROP_S4_DISABLED, 397 &pm->disable_s4, OBJ_PROP_FLAG_READWRITE); 398 object_property_add_uint8_ptr(obj, ACPI_PM_PROP_S4_VAL, 399 &pm->s4_val, OBJ_PROP_FLAG_READWRITE); 400 object_property_add_bool(obj, ACPI_PM_PROP_TCO_ENABLED, 401 ich9_pm_get_enable_tco, 402 ich9_pm_set_enable_tco); 403 } 404 405 void ich9_pm_device_pre_plug_cb(HotplugHandler *hotplug_dev, DeviceState *dev, 406 Error **errp) 407 { 408 ICH9LPCState *lpc = ICH9_LPC_DEVICE(hotplug_dev); 409 410 if (object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM) && 411 !lpc->pm.acpi_memory_hotplug.is_enabled) { 412 error_setg(errp, 413 "memory hotplug is not enabled: %s.memory-hotplug-support " 414 "is not set", object_get_typename(OBJECT(lpc))); 415 } else if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) { 416 uint64_t negotiated = lpc->smi_negotiated_features; 417 418 if (negotiated & BIT_ULL(ICH9_LPC_SMI_F_BROADCAST_BIT) && 419 !(negotiated & BIT_ULL(ICH9_LPC_SMI_F_CPU_HOTPLUG_BIT))) { 420 error_setg(errp, "cpu hotplug with SMI wasn't enabled by firmware"); 421 error_append_hint(errp, "update machine type to newer than 5.1 " 422 "and firmware that suppors CPU hotplug with SMM"); 423 } 424 } 425 } 426 427 void ich9_pm_device_plug_cb(HotplugHandler *hotplug_dev, DeviceState *dev, 428 Error **errp) 429 { 430 ICH9LPCState *lpc = ICH9_LPC_DEVICE(hotplug_dev); 431 432 if (object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) { 433 if (object_dynamic_cast(OBJECT(dev), TYPE_NVDIMM)) { 434 nvdimm_acpi_plug_cb(hotplug_dev, dev); 435 } else { 436 acpi_memory_plug_cb(hotplug_dev, &lpc->pm.acpi_memory_hotplug, 437 dev, errp); 438 } 439 } else if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) { 440 if (lpc->pm.cpu_hotplug_legacy) { 441 legacy_acpi_cpu_plug_cb(hotplug_dev, &lpc->pm.gpe_cpu, dev, errp); 442 } else { 443 acpi_cpu_plug_cb(hotplug_dev, &lpc->pm.cpuhp_state, dev, errp); 444 } 445 } else { 446 error_setg(errp, "acpi: device plug request for not supported device" 447 " type: %s", object_get_typename(OBJECT(dev))); 448 } 449 } 450 451 void ich9_pm_device_unplug_request_cb(HotplugHandler *hotplug_dev, 452 DeviceState *dev, Error **errp) 453 { 454 ICH9LPCState *lpc = ICH9_LPC_DEVICE(hotplug_dev); 455 456 if (lpc->pm.acpi_memory_hotplug.is_enabled && 457 object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) { 458 acpi_memory_unplug_request_cb(hotplug_dev, 459 &lpc->pm.acpi_memory_hotplug, dev, 460 errp); 461 } else if (object_dynamic_cast(OBJECT(dev), TYPE_CPU) && 462 !lpc->pm.cpu_hotplug_legacy) { 463 uint64_t negotiated = lpc->smi_negotiated_features; 464 465 if (negotiated & BIT_ULL(ICH9_LPC_SMI_F_BROADCAST_BIT) && 466 !(negotiated & BIT_ULL(ICH9_LPC_SMI_F_CPU_HOT_UNPLUG_BIT))) { 467 error_setg(errp, "cpu hot-unplug with SMI wasn't enabled " 468 "by firmware"); 469 error_append_hint(errp, "update machine type to a version having " 470 "x-smi-cpu-hotunplug=on and firmware that " 471 "supports CPU hot-unplug with SMM"); 472 return; 473 } 474 475 acpi_cpu_unplug_request_cb(hotplug_dev, &lpc->pm.cpuhp_state, 476 dev, errp); 477 } else { 478 error_setg(errp, "acpi: device unplug request for not supported device" 479 " type: %s", object_get_typename(OBJECT(dev))); 480 } 481 } 482 483 void ich9_pm_device_unplug_cb(HotplugHandler *hotplug_dev, DeviceState *dev, 484 Error **errp) 485 { 486 ICH9LPCState *lpc = ICH9_LPC_DEVICE(hotplug_dev); 487 488 if (lpc->pm.acpi_memory_hotplug.is_enabled && 489 object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) { 490 acpi_memory_unplug_cb(&lpc->pm.acpi_memory_hotplug, dev, errp); 491 } else if (object_dynamic_cast(OBJECT(dev), TYPE_CPU) && 492 !lpc->pm.cpu_hotplug_legacy) { 493 acpi_cpu_unplug_cb(&lpc->pm.cpuhp_state, dev, errp); 494 } else { 495 error_setg(errp, "acpi: device unplug for not supported device" 496 " type: %s", object_get_typename(OBJECT(dev))); 497 } 498 } 499 500 void ich9_pm_ospm_status(AcpiDeviceIf *adev, ACPIOSTInfoList ***list) 501 { 502 ICH9LPCState *s = ICH9_LPC_DEVICE(adev); 503 504 acpi_memory_ospm_status(&s->pm.acpi_memory_hotplug, list); 505 if (!s->pm.cpu_hotplug_legacy) { 506 acpi_cpu_ospm_status(&s->pm.cpuhp_state, list); 507 } 508 } 509