1 /* 2 * QEMU MCH/ICH9 PCI Bridge Emulation 3 * 4 * Copyright (c) 2006 Fabrice Bellard 5 * Copyright (c) 2009, 2010, 2011 6 * Isaku Yamahata <yamahata at valinux co jp> 7 * VA Linux Systems Japan K.K. 8 * Copyright (C) 2012 Jason Baron <jbaron@redhat.com> 9 * 10 * This is based on piix.c, but heavily modified. 11 * 12 * Permission is hereby granted, free of charge, to any person obtaining a copy 13 * of this software and associated documentation files (the "Software"), to deal 14 * in the Software without restriction, including without limitation the rights 15 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 16 * copies of the Software, and to permit persons to whom the Software is 17 * furnished to do so, subject to the following conditions: 18 * 19 * The above copyright notice and this permission notice shall be included in 20 * all copies or substantial portions of the Software. 21 * 22 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 23 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 24 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 25 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 26 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 27 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 28 * THE SOFTWARE. 29 */ 30 31 #include "qemu/osdep.h" 32 #include "hw/pci-host/q35.h" 33 #include "hw/qdev-properties.h" 34 #include "migration/vmstate.h" 35 #include "qapi/error.h" 36 #include "qapi/visitor.h" 37 #include "qemu/module.h" 38 39 /**************************************************************************** 40 * Q35 host 41 */ 42 43 #define Q35_PCI_HOST_HOLE64_SIZE_DEFAULT (1ULL << 35) 44 45 static void q35_host_realize(DeviceState *dev, Error **errp) 46 { 47 PCIHostState *pci = PCI_HOST_BRIDGE(dev); 48 Q35PCIHost *s = Q35_HOST_DEVICE(dev); 49 SysBusDevice *sbd = SYS_BUS_DEVICE(dev); 50 51 sysbus_add_io(sbd, MCH_HOST_BRIDGE_CONFIG_ADDR, &pci->conf_mem); 52 sysbus_init_ioports(sbd, MCH_HOST_BRIDGE_CONFIG_ADDR, 4); 53 54 sysbus_add_io(sbd, MCH_HOST_BRIDGE_CONFIG_DATA, &pci->data_mem); 55 sysbus_init_ioports(sbd, MCH_HOST_BRIDGE_CONFIG_DATA, 4); 56 57 /* register q35 0xcf8 port as coalesced pio */ 58 memory_region_set_flush_coalesced(&pci->data_mem); 59 memory_region_add_coalescing(&pci->conf_mem, 0, 4); 60 61 pci->bus = pci_root_bus_new(DEVICE(s), "pcie.0", 62 s->mch.pci_address_space, 63 s->mch.address_space_io, 64 0, TYPE_PCIE_BUS); 65 PC_MACHINE(qdev_get_machine())->bus = pci->bus; 66 qdev_set_parent_bus(DEVICE(&s->mch), BUS(pci->bus)); 67 qdev_init_nofail(DEVICE(&s->mch)); 68 } 69 70 static const char *q35_host_root_bus_path(PCIHostState *host_bridge, 71 PCIBus *rootbus) 72 { 73 Q35PCIHost *s = Q35_HOST_DEVICE(host_bridge); 74 75 /* For backwards compat with old device paths */ 76 if (s->mch.short_root_bus) { 77 return "0000"; 78 } 79 return "0000:00"; 80 } 81 82 static void q35_host_get_pci_hole_start(Object *obj, Visitor *v, 83 const char *name, void *opaque, 84 Error **errp) 85 { 86 Q35PCIHost *s = Q35_HOST_DEVICE(obj); 87 uint64_t val64; 88 uint32_t value; 89 90 val64 = range_is_empty(&s->mch.pci_hole) 91 ? 0 : range_lob(&s->mch.pci_hole); 92 value = val64; 93 assert(value == val64); 94 visit_type_uint32(v, name, &value, errp); 95 } 96 97 static void q35_host_get_pci_hole_end(Object *obj, Visitor *v, 98 const char *name, void *opaque, 99 Error **errp) 100 { 101 Q35PCIHost *s = Q35_HOST_DEVICE(obj); 102 uint64_t val64; 103 uint32_t value; 104 105 val64 = range_is_empty(&s->mch.pci_hole) 106 ? 0 : range_upb(&s->mch.pci_hole) + 1; 107 value = val64; 108 assert(value == val64); 109 visit_type_uint32(v, name, &value, errp); 110 } 111 112 /* 113 * The 64bit PCI hole start is set by the Guest firmware 114 * as the address of the first 64bit PCI MEM resource. 115 * If no PCI device has resources on the 64bit area, 116 * the 64bit PCI hole will start after "over 4G RAM" and the 117 * reserved space for memory hotplug if any. 118 */ 119 static uint64_t q35_host_get_pci_hole64_start_value(Object *obj) 120 { 121 PCIHostState *h = PCI_HOST_BRIDGE(obj); 122 Q35PCIHost *s = Q35_HOST_DEVICE(obj); 123 Range w64; 124 uint64_t value; 125 126 pci_bus_get_w64_range(h->bus, &w64); 127 value = range_is_empty(&w64) ? 0 : range_lob(&w64); 128 if (!value && s->pci_hole64_fix) { 129 value = pc_pci_hole64_start(); 130 } 131 return value; 132 } 133 134 static void q35_host_get_pci_hole64_start(Object *obj, Visitor *v, 135 const char *name, void *opaque, 136 Error **errp) 137 { 138 uint64_t hole64_start = q35_host_get_pci_hole64_start_value(obj); 139 140 visit_type_uint64(v, name, &hole64_start, errp); 141 } 142 143 /* 144 * The 64bit PCI hole end is set by the Guest firmware 145 * as the address of the last 64bit PCI MEM resource. 146 * Then it is expanded to the PCI_HOST_PROP_PCI_HOLE64_SIZE 147 * that can be configured by the user. 148 */ 149 static void q35_host_get_pci_hole64_end(Object *obj, Visitor *v, 150 const char *name, void *opaque, 151 Error **errp) 152 { 153 PCIHostState *h = PCI_HOST_BRIDGE(obj); 154 Q35PCIHost *s = Q35_HOST_DEVICE(obj); 155 uint64_t hole64_start = q35_host_get_pci_hole64_start_value(obj); 156 Range w64; 157 uint64_t value, hole64_end; 158 159 pci_bus_get_w64_range(h->bus, &w64); 160 value = range_is_empty(&w64) ? 0 : range_upb(&w64) + 1; 161 hole64_end = ROUND_UP(hole64_start + s->mch.pci_hole64_size, 1ULL << 30); 162 if (s->pci_hole64_fix && value < hole64_end) { 163 value = hole64_end; 164 } 165 visit_type_uint64(v, name, &value, errp); 166 } 167 168 static void q35_host_get_mmcfg_size(Object *obj, Visitor *v, const char *name, 169 void *opaque, Error **errp) 170 { 171 PCIExpressHost *e = PCIE_HOST_BRIDGE(obj); 172 173 visit_type_uint64(v, name, &e->size, errp); 174 } 175 176 /* 177 * NOTE: setting defaults for the mch.* fields in this table 178 * doesn't work, because mch is a separate QOM object that is 179 * zeroed by the object_initialize(&s->mch, ...) call inside 180 * q35_host_initfn(). The default values for those 181 * properties need to be initialized manually by 182 * q35_host_initfn() after the object_initialize() call. 183 */ 184 static Property q35_host_props[] = { 185 DEFINE_PROP_UINT64(PCIE_HOST_MCFG_BASE, Q35PCIHost, parent_obj.base_addr, 186 MCH_HOST_BRIDGE_PCIEXBAR_DEFAULT), 187 DEFINE_PROP_SIZE(PCI_HOST_PROP_PCI_HOLE64_SIZE, Q35PCIHost, 188 mch.pci_hole64_size, Q35_PCI_HOST_HOLE64_SIZE_DEFAULT), 189 DEFINE_PROP_UINT32("short_root_bus", Q35PCIHost, mch.short_root_bus, 0), 190 DEFINE_PROP_SIZE(PCI_HOST_BELOW_4G_MEM_SIZE, Q35PCIHost, 191 mch.below_4g_mem_size, 0), 192 DEFINE_PROP_SIZE(PCI_HOST_ABOVE_4G_MEM_SIZE, Q35PCIHost, 193 mch.above_4g_mem_size, 0), 194 DEFINE_PROP_BOOL("x-pci-hole64-fix", Q35PCIHost, pci_hole64_fix, true), 195 DEFINE_PROP_END_OF_LIST(), 196 }; 197 198 static void q35_host_class_init(ObjectClass *klass, void *data) 199 { 200 DeviceClass *dc = DEVICE_CLASS(klass); 201 PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_CLASS(klass); 202 203 hc->root_bus_path = q35_host_root_bus_path; 204 dc->realize = q35_host_realize; 205 dc->props = q35_host_props; 206 /* Reason: needs to be wired up by pc_q35_init */ 207 dc->user_creatable = false; 208 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories); 209 dc->fw_name = "pci"; 210 } 211 212 static void q35_host_initfn(Object *obj) 213 { 214 Q35PCIHost *s = Q35_HOST_DEVICE(obj); 215 PCIHostState *phb = PCI_HOST_BRIDGE(obj); 216 217 memory_region_init_io(&phb->conf_mem, obj, &pci_host_conf_le_ops, phb, 218 "pci-conf-idx", 4); 219 memory_region_init_io(&phb->data_mem, obj, &pci_host_data_le_ops, phb, 220 "pci-conf-data", 4); 221 222 object_initialize_child(OBJECT(s), "mch", &s->mch, sizeof(s->mch), 223 TYPE_MCH_PCI_DEVICE, &error_abort, NULL); 224 qdev_prop_set_int32(DEVICE(&s->mch), "addr", PCI_DEVFN(0, 0)); 225 qdev_prop_set_bit(DEVICE(&s->mch), "multifunction", false); 226 /* mch's object_initialize resets the default value, set it again */ 227 qdev_prop_set_uint64(DEVICE(s), PCI_HOST_PROP_PCI_HOLE64_SIZE, 228 Q35_PCI_HOST_HOLE64_SIZE_DEFAULT); 229 object_property_add(obj, PCI_HOST_PROP_PCI_HOLE_START, "uint32", 230 q35_host_get_pci_hole_start, 231 NULL, NULL, NULL, NULL); 232 233 object_property_add(obj, PCI_HOST_PROP_PCI_HOLE_END, "uint32", 234 q35_host_get_pci_hole_end, 235 NULL, NULL, NULL, NULL); 236 237 object_property_add(obj, PCI_HOST_PROP_PCI_HOLE64_START, "uint64", 238 q35_host_get_pci_hole64_start, 239 NULL, NULL, NULL, NULL); 240 241 object_property_add(obj, PCI_HOST_PROP_PCI_HOLE64_END, "uint64", 242 q35_host_get_pci_hole64_end, 243 NULL, NULL, NULL, NULL); 244 245 object_property_add(obj, PCIE_HOST_MCFG_SIZE, "uint64", 246 q35_host_get_mmcfg_size, 247 NULL, NULL, NULL, NULL); 248 249 object_property_add_link(obj, MCH_HOST_PROP_RAM_MEM, TYPE_MEMORY_REGION, 250 (Object **) &s->mch.ram_memory, 251 qdev_prop_allow_set_link_before_realize, 0, NULL); 252 253 object_property_add_link(obj, MCH_HOST_PROP_PCI_MEM, TYPE_MEMORY_REGION, 254 (Object **) &s->mch.pci_address_space, 255 qdev_prop_allow_set_link_before_realize, 0, NULL); 256 257 object_property_add_link(obj, MCH_HOST_PROP_SYSTEM_MEM, TYPE_MEMORY_REGION, 258 (Object **) &s->mch.system_memory, 259 qdev_prop_allow_set_link_before_realize, 0, NULL); 260 261 object_property_add_link(obj, MCH_HOST_PROP_IO_MEM, TYPE_MEMORY_REGION, 262 (Object **) &s->mch.address_space_io, 263 qdev_prop_allow_set_link_before_realize, 0, NULL); 264 } 265 266 static const TypeInfo q35_host_info = { 267 .name = TYPE_Q35_HOST_DEVICE, 268 .parent = TYPE_PCIE_HOST_BRIDGE, 269 .instance_size = sizeof(Q35PCIHost), 270 .instance_init = q35_host_initfn, 271 .class_init = q35_host_class_init, 272 }; 273 274 /**************************************************************************** 275 * MCH D0:F0 276 */ 277 278 static uint64_t blackhole_read(void *ptr, hwaddr reg, unsigned size) 279 { 280 return 0xffffffff; 281 } 282 283 static void blackhole_write(void *opaque, hwaddr addr, uint64_t val, 284 unsigned width) 285 { 286 /* nothing */ 287 } 288 289 static const MemoryRegionOps blackhole_ops = { 290 .read = blackhole_read, 291 .write = blackhole_write, 292 .endianness = DEVICE_NATIVE_ENDIAN, 293 .valid.min_access_size = 1, 294 .valid.max_access_size = 4, 295 .impl.min_access_size = 4, 296 .impl.max_access_size = 4, 297 .endianness = DEVICE_LITTLE_ENDIAN, 298 }; 299 300 /* PCIe MMCFG */ 301 static void mch_update_pciexbar(MCHPCIState *mch) 302 { 303 PCIDevice *pci_dev = PCI_DEVICE(mch); 304 BusState *bus = qdev_get_parent_bus(DEVICE(mch)); 305 PCIExpressHost *pehb = PCIE_HOST_BRIDGE(bus->parent); 306 307 uint64_t pciexbar; 308 int enable; 309 uint64_t addr; 310 uint64_t addr_mask; 311 uint32_t length; 312 313 pciexbar = pci_get_quad(pci_dev->config + MCH_HOST_BRIDGE_PCIEXBAR); 314 enable = pciexbar & MCH_HOST_BRIDGE_PCIEXBAREN; 315 addr_mask = MCH_HOST_BRIDGE_PCIEXBAR_ADMSK; 316 switch (pciexbar & MCH_HOST_BRIDGE_PCIEXBAR_LENGTH_MASK) { 317 case MCH_HOST_BRIDGE_PCIEXBAR_LENGTH_256M: 318 length = 256 * 1024 * 1024; 319 break; 320 case MCH_HOST_BRIDGE_PCIEXBAR_LENGTH_128M: 321 length = 128 * 1024 * 1024; 322 addr_mask |= MCH_HOST_BRIDGE_PCIEXBAR_128ADMSK | 323 MCH_HOST_BRIDGE_PCIEXBAR_64ADMSK; 324 break; 325 case MCH_HOST_BRIDGE_PCIEXBAR_LENGTH_64M: 326 length = 64 * 1024 * 1024; 327 addr_mask |= MCH_HOST_BRIDGE_PCIEXBAR_64ADMSK; 328 break; 329 case MCH_HOST_BRIDGE_PCIEXBAR_LENGTH_RVD: 330 default: 331 abort(); 332 } 333 addr = pciexbar & addr_mask; 334 pcie_host_mmcfg_update(pehb, enable, addr, length); 335 } 336 337 /* PAM */ 338 static void mch_update_pam(MCHPCIState *mch) 339 { 340 PCIDevice *pd = PCI_DEVICE(mch); 341 int i; 342 343 memory_region_transaction_begin(); 344 for (i = 0; i < 13; i++) { 345 pam_update(&mch->pam_regions[i], i, 346 pd->config[MCH_HOST_BRIDGE_PAM0 + DIV_ROUND_UP(i, 2)]); 347 } 348 memory_region_transaction_commit(); 349 } 350 351 /* SMRAM */ 352 static void mch_update_smram(MCHPCIState *mch) 353 { 354 PCIDevice *pd = PCI_DEVICE(mch); 355 bool h_smrame = (pd->config[MCH_HOST_BRIDGE_ESMRAMC] & MCH_HOST_BRIDGE_ESMRAMC_H_SMRAME); 356 uint32_t tseg_size; 357 358 /* implement SMRAM.D_LCK */ 359 if (pd->config[MCH_HOST_BRIDGE_SMRAM] & MCH_HOST_BRIDGE_SMRAM_D_LCK) { 360 pd->config[MCH_HOST_BRIDGE_SMRAM] &= ~MCH_HOST_BRIDGE_SMRAM_D_OPEN; 361 pd->wmask[MCH_HOST_BRIDGE_SMRAM] = MCH_HOST_BRIDGE_SMRAM_WMASK_LCK; 362 pd->wmask[MCH_HOST_BRIDGE_ESMRAMC] = MCH_HOST_BRIDGE_ESMRAMC_WMASK_LCK; 363 } 364 365 memory_region_transaction_begin(); 366 367 if (pd->config[MCH_HOST_BRIDGE_SMRAM] & SMRAM_D_OPEN) { 368 /* Hide (!) low SMRAM if H_SMRAME = 1 */ 369 memory_region_set_enabled(&mch->smram_region, h_smrame); 370 /* Show high SMRAM if H_SMRAME = 1 */ 371 memory_region_set_enabled(&mch->open_high_smram, h_smrame); 372 } else { 373 /* Hide high SMRAM and low SMRAM */ 374 memory_region_set_enabled(&mch->smram_region, true); 375 memory_region_set_enabled(&mch->open_high_smram, false); 376 } 377 378 if (pd->config[MCH_HOST_BRIDGE_SMRAM] & SMRAM_G_SMRAME) { 379 memory_region_set_enabled(&mch->low_smram, !h_smrame); 380 memory_region_set_enabled(&mch->high_smram, h_smrame); 381 } else { 382 memory_region_set_enabled(&mch->low_smram, false); 383 memory_region_set_enabled(&mch->high_smram, false); 384 } 385 386 if (pd->config[MCH_HOST_BRIDGE_ESMRAMC] & MCH_HOST_BRIDGE_ESMRAMC_T_EN) { 387 switch (pd->config[MCH_HOST_BRIDGE_ESMRAMC] & 388 MCH_HOST_BRIDGE_ESMRAMC_TSEG_SZ_MASK) { 389 case MCH_HOST_BRIDGE_ESMRAMC_TSEG_SZ_1MB: 390 tseg_size = 1024 * 1024; 391 break; 392 case MCH_HOST_BRIDGE_ESMRAMC_TSEG_SZ_2MB: 393 tseg_size = 1024 * 1024 * 2; 394 break; 395 case MCH_HOST_BRIDGE_ESMRAMC_TSEG_SZ_8MB: 396 tseg_size = 1024 * 1024 * 8; 397 break; 398 default: 399 tseg_size = 1024 * 1024 * (uint32_t)mch->ext_tseg_mbytes; 400 break; 401 } 402 } else { 403 tseg_size = 0; 404 } 405 memory_region_del_subregion(mch->system_memory, &mch->tseg_blackhole); 406 memory_region_set_enabled(&mch->tseg_blackhole, tseg_size); 407 memory_region_set_size(&mch->tseg_blackhole, tseg_size); 408 memory_region_add_subregion_overlap(mch->system_memory, 409 mch->below_4g_mem_size - tseg_size, 410 &mch->tseg_blackhole, 1); 411 412 memory_region_set_enabled(&mch->tseg_window, tseg_size); 413 memory_region_set_size(&mch->tseg_window, tseg_size); 414 memory_region_set_address(&mch->tseg_window, 415 mch->below_4g_mem_size - tseg_size); 416 memory_region_set_alias_offset(&mch->tseg_window, 417 mch->below_4g_mem_size - tseg_size); 418 419 memory_region_transaction_commit(); 420 } 421 422 static void mch_update_ext_tseg_mbytes(MCHPCIState *mch) 423 { 424 PCIDevice *pd = PCI_DEVICE(mch); 425 uint8_t *reg = pd->config + MCH_HOST_BRIDGE_EXT_TSEG_MBYTES; 426 427 if (mch->ext_tseg_mbytes > 0 && 428 pci_get_word(reg) == MCH_HOST_BRIDGE_EXT_TSEG_MBYTES_QUERY) { 429 pci_set_word(reg, mch->ext_tseg_mbytes); 430 } 431 } 432 433 static void mch_update_smbase_smram(MCHPCIState *mch) 434 { 435 PCIDevice *pd = PCI_DEVICE(mch); 436 uint8_t *reg = pd->config + MCH_HOST_BRIDGE_F_SMBASE; 437 bool lck; 438 439 if (!mch->has_smram_at_smbase) { 440 return; 441 } 442 443 if (*reg == MCH_HOST_BRIDGE_F_SMBASE_QUERY) { 444 pd->wmask[MCH_HOST_BRIDGE_F_SMBASE] = 445 MCH_HOST_BRIDGE_F_SMBASE_LCK; 446 *reg = MCH_HOST_BRIDGE_F_SMBASE_IN_RAM; 447 return; 448 } 449 450 /* 451 * default/reset state, discard written value 452 * which will disable SMRAM balackhole at SMBASE 453 */ 454 if (pd->wmask[MCH_HOST_BRIDGE_F_SMBASE] == 0xff) { 455 *reg = 0x00; 456 } 457 458 memory_region_transaction_begin(); 459 if (*reg & MCH_HOST_BRIDGE_F_SMBASE_LCK) { 460 /* disable all writes */ 461 pd->wmask[MCH_HOST_BRIDGE_F_SMBASE] &= 462 ~MCH_HOST_BRIDGE_F_SMBASE_LCK; 463 *reg = MCH_HOST_BRIDGE_F_SMBASE_LCK; 464 lck = true; 465 } else { 466 lck = false; 467 } 468 memory_region_set_enabled(&mch->smbase_blackhole, lck); 469 memory_region_set_enabled(&mch->smbase_window, lck); 470 memory_region_transaction_commit(); 471 } 472 473 static void mch_write_config(PCIDevice *d, 474 uint32_t address, uint32_t val, int len) 475 { 476 MCHPCIState *mch = MCH_PCI_DEVICE(d); 477 478 pci_default_write_config(d, address, val, len); 479 480 if (ranges_overlap(address, len, MCH_HOST_BRIDGE_PAM0, 481 MCH_HOST_BRIDGE_PAM_SIZE)) { 482 mch_update_pam(mch); 483 } 484 485 if (ranges_overlap(address, len, MCH_HOST_BRIDGE_PCIEXBAR, 486 MCH_HOST_BRIDGE_PCIEXBAR_SIZE)) { 487 mch_update_pciexbar(mch); 488 } 489 490 if (ranges_overlap(address, len, MCH_HOST_BRIDGE_SMRAM, 491 MCH_HOST_BRIDGE_SMRAM_SIZE)) { 492 mch_update_smram(mch); 493 } 494 495 if (ranges_overlap(address, len, MCH_HOST_BRIDGE_EXT_TSEG_MBYTES, 496 MCH_HOST_BRIDGE_EXT_TSEG_MBYTES_SIZE)) { 497 mch_update_ext_tseg_mbytes(mch); 498 } 499 500 if (ranges_overlap(address, len, MCH_HOST_BRIDGE_F_SMBASE, 1)) { 501 mch_update_smbase_smram(mch); 502 } 503 } 504 505 static void mch_update(MCHPCIState *mch) 506 { 507 mch_update_pciexbar(mch); 508 mch_update_pam(mch); 509 mch_update_smram(mch); 510 mch_update_ext_tseg_mbytes(mch); 511 mch_update_smbase_smram(mch); 512 513 /* 514 * pci hole goes from end-of-low-ram to io-apic. 515 * mmconfig will be excluded by the dsdt builder. 516 */ 517 range_set_bounds(&mch->pci_hole, 518 mch->below_4g_mem_size, 519 IO_APIC_DEFAULT_ADDRESS - 1); 520 } 521 522 static int mch_post_load(void *opaque, int version_id) 523 { 524 MCHPCIState *mch = opaque; 525 mch_update(mch); 526 return 0; 527 } 528 529 static const VMStateDescription vmstate_mch = { 530 .name = "mch", 531 .version_id = 1, 532 .minimum_version_id = 1, 533 .post_load = mch_post_load, 534 .fields = (VMStateField[]) { 535 VMSTATE_PCI_DEVICE(parent_obj, MCHPCIState), 536 /* Used to be smm_enabled, which was basically always zero because 537 * SeaBIOS hardly uses SMM. SMRAM is now handled by CPU code. 538 */ 539 VMSTATE_UNUSED(1), 540 VMSTATE_END_OF_LIST() 541 } 542 }; 543 544 static void mch_reset(DeviceState *qdev) 545 { 546 PCIDevice *d = PCI_DEVICE(qdev); 547 MCHPCIState *mch = MCH_PCI_DEVICE(d); 548 549 pci_set_quad(d->config + MCH_HOST_BRIDGE_PCIEXBAR, 550 MCH_HOST_BRIDGE_PCIEXBAR_DEFAULT); 551 552 d->config[MCH_HOST_BRIDGE_SMRAM] = MCH_HOST_BRIDGE_SMRAM_DEFAULT; 553 d->config[MCH_HOST_BRIDGE_ESMRAMC] = MCH_HOST_BRIDGE_ESMRAMC_DEFAULT; 554 d->wmask[MCH_HOST_BRIDGE_SMRAM] = MCH_HOST_BRIDGE_SMRAM_WMASK; 555 d->wmask[MCH_HOST_BRIDGE_ESMRAMC] = MCH_HOST_BRIDGE_ESMRAMC_WMASK; 556 557 if (mch->ext_tseg_mbytes > 0) { 558 pci_set_word(d->config + MCH_HOST_BRIDGE_EXT_TSEG_MBYTES, 559 MCH_HOST_BRIDGE_EXT_TSEG_MBYTES_QUERY); 560 } 561 562 d->config[MCH_HOST_BRIDGE_F_SMBASE] = 0; 563 d->wmask[MCH_HOST_BRIDGE_F_SMBASE] = 0xff; 564 565 mch_update(mch); 566 } 567 568 static void mch_realize(PCIDevice *d, Error **errp) 569 { 570 int i; 571 MCHPCIState *mch = MCH_PCI_DEVICE(d); 572 573 if (mch->ext_tseg_mbytes > MCH_HOST_BRIDGE_EXT_TSEG_MBYTES_MAX) { 574 error_setg(errp, "invalid extended-tseg-mbytes value: %" PRIu16, 575 mch->ext_tseg_mbytes); 576 return; 577 } 578 579 /* setup pci memory mapping */ 580 pc_pci_as_mapping_init(OBJECT(mch), mch->system_memory, 581 mch->pci_address_space); 582 583 /* if *disabled* show SMRAM to all CPUs */ 584 memory_region_init_alias(&mch->smram_region, OBJECT(mch), "smram-region", 585 mch->pci_address_space, MCH_HOST_BRIDGE_SMRAM_C_BASE, 586 MCH_HOST_BRIDGE_SMRAM_C_SIZE); 587 memory_region_add_subregion_overlap(mch->system_memory, MCH_HOST_BRIDGE_SMRAM_C_BASE, 588 &mch->smram_region, 1); 589 memory_region_set_enabled(&mch->smram_region, true); 590 591 memory_region_init_alias(&mch->open_high_smram, OBJECT(mch), "smram-open-high", 592 mch->ram_memory, MCH_HOST_BRIDGE_SMRAM_C_BASE, 593 MCH_HOST_BRIDGE_SMRAM_C_SIZE); 594 memory_region_add_subregion_overlap(mch->system_memory, 0xfeda0000, 595 &mch->open_high_smram, 1); 596 memory_region_set_enabled(&mch->open_high_smram, false); 597 598 /* smram, as seen by SMM CPUs */ 599 memory_region_init(&mch->smram, OBJECT(mch), "smram", 1ull << 32); 600 memory_region_set_enabled(&mch->smram, true); 601 memory_region_init_alias(&mch->low_smram, OBJECT(mch), "smram-low", 602 mch->ram_memory, MCH_HOST_BRIDGE_SMRAM_C_BASE, 603 MCH_HOST_BRIDGE_SMRAM_C_SIZE); 604 memory_region_set_enabled(&mch->low_smram, true); 605 memory_region_add_subregion(&mch->smram, MCH_HOST_BRIDGE_SMRAM_C_BASE, 606 &mch->low_smram); 607 memory_region_init_alias(&mch->high_smram, OBJECT(mch), "smram-high", 608 mch->ram_memory, MCH_HOST_BRIDGE_SMRAM_C_BASE, 609 MCH_HOST_BRIDGE_SMRAM_C_SIZE); 610 memory_region_set_enabled(&mch->high_smram, true); 611 memory_region_add_subregion(&mch->smram, 0xfeda0000, &mch->high_smram); 612 613 memory_region_init_io(&mch->tseg_blackhole, OBJECT(mch), 614 &blackhole_ops, NULL, 615 "tseg-blackhole", 0); 616 memory_region_set_enabled(&mch->tseg_blackhole, false); 617 memory_region_add_subregion_overlap(mch->system_memory, 618 mch->below_4g_mem_size, 619 &mch->tseg_blackhole, 1); 620 621 memory_region_init_alias(&mch->tseg_window, OBJECT(mch), "tseg-window", 622 mch->ram_memory, mch->below_4g_mem_size, 0); 623 memory_region_set_enabled(&mch->tseg_window, false); 624 memory_region_add_subregion(&mch->smram, mch->below_4g_mem_size, 625 &mch->tseg_window); 626 627 /* 628 * This is not what hardware does, so it's QEMU specific hack. 629 * See commit message for details. 630 */ 631 memory_region_init_io(&mch->smbase_blackhole, OBJECT(mch), &blackhole_ops, 632 NULL, "smbase-blackhole", 633 MCH_HOST_BRIDGE_SMBASE_SIZE); 634 memory_region_set_enabled(&mch->smbase_blackhole, false); 635 memory_region_add_subregion_overlap(mch->system_memory, 636 MCH_HOST_BRIDGE_SMBASE_ADDR, 637 &mch->smbase_blackhole, 1); 638 639 memory_region_init_alias(&mch->smbase_window, OBJECT(mch), 640 "smbase-window", mch->ram_memory, 641 MCH_HOST_BRIDGE_SMBASE_ADDR, 642 MCH_HOST_BRIDGE_SMBASE_SIZE); 643 memory_region_set_enabled(&mch->smbase_window, false); 644 memory_region_add_subregion(&mch->smram, MCH_HOST_BRIDGE_SMBASE_ADDR, 645 &mch->smbase_window); 646 647 object_property_add_const_link(qdev_get_machine(), "smram", 648 OBJECT(&mch->smram), &error_abort); 649 650 init_pam(DEVICE(mch), mch->ram_memory, mch->system_memory, 651 mch->pci_address_space, &mch->pam_regions[0], 652 PAM_BIOS_BASE, PAM_BIOS_SIZE); 653 for (i = 0; i < 12; ++i) { 654 init_pam(DEVICE(mch), mch->ram_memory, mch->system_memory, 655 mch->pci_address_space, &mch->pam_regions[i+1], 656 PAM_EXPAN_BASE + i * PAM_EXPAN_SIZE, PAM_EXPAN_SIZE); 657 } 658 } 659 660 uint64_t mch_mcfg_base(void) 661 { 662 bool ambiguous; 663 Object *o = object_resolve_path_type("", TYPE_MCH_PCI_DEVICE, &ambiguous); 664 if (!o) { 665 return 0; 666 } 667 return MCH_HOST_BRIDGE_PCIEXBAR_DEFAULT; 668 } 669 670 static Property mch_props[] = { 671 DEFINE_PROP_UINT16("extended-tseg-mbytes", MCHPCIState, ext_tseg_mbytes, 672 16), 673 DEFINE_PROP_BOOL("smbase-smram", MCHPCIState, has_smram_at_smbase, true), 674 DEFINE_PROP_END_OF_LIST(), 675 }; 676 677 static void mch_class_init(ObjectClass *klass, void *data) 678 { 679 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 680 DeviceClass *dc = DEVICE_CLASS(klass); 681 682 k->realize = mch_realize; 683 k->config_write = mch_write_config; 684 dc->reset = mch_reset; 685 dc->props = mch_props; 686 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories); 687 dc->desc = "Host bridge"; 688 dc->vmsd = &vmstate_mch; 689 k->vendor_id = PCI_VENDOR_ID_INTEL; 690 /* 691 * The 'q35' machine type implements an Intel Series 3 chipset, 692 * of which there are several variants. The key difference between 693 * the 82P35 MCH ('p35') and 82Q35 GMCH ('q35') variants is that 694 * the latter has an integrated graphics adapter. QEMU does not 695 * implement integrated graphics, so uses the PCI ID for the 82P35 696 * chipset. 697 */ 698 k->device_id = PCI_DEVICE_ID_INTEL_P35_MCH; 699 k->revision = MCH_HOST_BRIDGE_REVISION_DEFAULT; 700 k->class_id = PCI_CLASS_BRIDGE_HOST; 701 /* 702 * PCI-facing part of the host bridge, not usable without the 703 * host-facing part, which can't be device_add'ed, yet. 704 */ 705 dc->user_creatable = false; 706 } 707 708 static const TypeInfo mch_info = { 709 .name = TYPE_MCH_PCI_DEVICE, 710 .parent = TYPE_PCI_DEVICE, 711 .instance_size = sizeof(MCHPCIState), 712 .class_init = mch_class_init, 713 .interfaces = (InterfaceInfo[]) { 714 { INTERFACE_CONVENTIONAL_PCI_DEVICE }, 715 { }, 716 }, 717 }; 718 719 static void q35_register(void) 720 { 721 type_register_static(&mch_info); 722 type_register_static(&q35_host_info); 723 } 724 725 type_init(q35_register); 726