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 "qemu/log.h" 33 #include "hw/i386/pc.h" 34 #include "hw/pci-host/q35.h" 35 #include "hw/qdev-properties.h" 36 #include "migration/vmstate.h" 37 #include "qapi/error.h" 38 #include "qapi/visitor.h" 39 #include "qemu/module.h" 40 41 /**************************************************************************** 42 * Q35 host 43 */ 44 45 #define Q35_PCI_HOST_HOLE64_SIZE_DEFAULT (1ULL << 35) 46 47 static void q35_host_realize(DeviceState *dev, Error **errp) 48 { 49 PCIHostState *pci = PCI_HOST_BRIDGE(dev); 50 Q35PCIHost *s = Q35_HOST_DEVICE(dev); 51 SysBusDevice *sbd = SYS_BUS_DEVICE(dev); 52 53 memory_region_add_subregion(s->mch.address_space_io, 54 MCH_HOST_BRIDGE_CONFIG_ADDR, &pci->conf_mem); 55 sysbus_init_ioports(sbd, MCH_HOST_BRIDGE_CONFIG_ADDR, 4); 56 57 memory_region_add_subregion(s->mch.address_space_io, 58 MCH_HOST_BRIDGE_CONFIG_DATA, &pci->data_mem); 59 sysbus_init_ioports(sbd, MCH_HOST_BRIDGE_CONFIG_DATA, 4); 60 61 /* register q35 0xcf8 port as coalesced pio */ 62 memory_region_set_flush_coalesced(&pci->data_mem); 63 memory_region_add_coalescing(&pci->conf_mem, 0, 4); 64 65 pci->bus = pci_root_bus_new(DEVICE(s), "pcie.0", 66 s->mch.pci_address_space, 67 s->mch.address_space_io, 68 0, TYPE_PCIE_BUS); 69 70 qdev_realize(DEVICE(&s->mch), BUS(pci->bus), &error_fatal); 71 } 72 73 static const char *q35_host_root_bus_path(PCIHostState *host_bridge, 74 PCIBus *rootbus) 75 { 76 return "0000:00"; 77 } 78 79 static void q35_host_get_pci_hole_start(Object *obj, Visitor *v, 80 const char *name, void *opaque, 81 Error **errp) 82 { 83 Q35PCIHost *s = Q35_HOST_DEVICE(obj); 84 uint64_t val64; 85 uint32_t value; 86 87 val64 = range_is_empty(&s->mch.pci_hole) 88 ? 0 : range_lob(&s->mch.pci_hole); 89 value = val64; 90 assert(value == val64); 91 visit_type_uint32(v, name, &value, errp); 92 } 93 94 static void q35_host_get_pci_hole_end(Object *obj, Visitor *v, 95 const char *name, void *opaque, 96 Error **errp) 97 { 98 Q35PCIHost *s = Q35_HOST_DEVICE(obj); 99 uint64_t val64; 100 uint32_t value; 101 102 val64 = range_is_empty(&s->mch.pci_hole) 103 ? 0 : range_upb(&s->mch.pci_hole) + 1; 104 value = val64; 105 assert(value == val64); 106 visit_type_uint32(v, name, &value, errp); 107 } 108 109 /* 110 * The 64bit PCI hole start is set by the Guest firmware 111 * as the address of the first 64bit PCI MEM resource. 112 * If no PCI device has resources on the 64bit area, 113 * the 64bit PCI hole will start after "over 4G RAM" and the 114 * reserved space for memory hotplug if any. 115 */ 116 static uint64_t q35_host_get_pci_hole64_start_value(Object *obj) 117 { 118 PCIHostState *h = PCI_HOST_BRIDGE(obj); 119 Q35PCIHost *s = Q35_HOST_DEVICE(obj); 120 Range w64; 121 uint64_t value; 122 123 pci_bus_get_w64_range(h->bus, &w64); 124 value = range_is_empty(&w64) ? 0 : range_lob(&w64); 125 if (!value && s->pci_hole64_fix) { 126 value = pc_pci_hole64_start(); 127 } 128 return value; 129 } 130 131 static void q35_host_get_pci_hole64_start(Object *obj, Visitor *v, 132 const char *name, void *opaque, 133 Error **errp) 134 { 135 uint64_t hole64_start = q35_host_get_pci_hole64_start_value(obj); 136 137 visit_type_uint64(v, name, &hole64_start, errp); 138 } 139 140 /* 141 * The 64bit PCI hole end is set by the Guest firmware 142 * as the address of the last 64bit PCI MEM resource. 143 * Then it is expanded to the PCI_HOST_PROP_PCI_HOLE64_SIZE 144 * that can be configured by the user. 145 */ 146 static void q35_host_get_pci_hole64_end(Object *obj, Visitor *v, 147 const char *name, void *opaque, 148 Error **errp) 149 { 150 PCIHostState *h = PCI_HOST_BRIDGE(obj); 151 Q35PCIHost *s = Q35_HOST_DEVICE(obj); 152 uint64_t hole64_start = q35_host_get_pci_hole64_start_value(obj); 153 Range w64; 154 uint64_t value, hole64_end; 155 156 pci_bus_get_w64_range(h->bus, &w64); 157 value = range_is_empty(&w64) ? 0 : range_upb(&w64) + 1; 158 hole64_end = ROUND_UP(hole64_start + s->mch.pci_hole64_size, 1ULL << 30); 159 if (s->pci_hole64_fix && value < hole64_end) { 160 value = hole64_end; 161 } 162 visit_type_uint64(v, name, &value, errp); 163 } 164 165 /* 166 * NOTE: setting defaults for the mch.* fields in this table 167 * doesn't work, because mch is a separate QOM object that is 168 * zeroed by the object_initialize(&s->mch, ...) call inside 169 * q35_host_initfn(). The default values for those 170 * properties need to be initialized manually by 171 * q35_host_initfn() after the object_initialize() call. 172 */ 173 static Property q35_host_props[] = { 174 DEFINE_PROP_UINT64(PCIE_HOST_MCFG_BASE, Q35PCIHost, parent_obj.base_addr, 175 MCH_HOST_BRIDGE_PCIEXBAR_DEFAULT), 176 DEFINE_PROP_SIZE(PCI_HOST_PROP_PCI_HOLE64_SIZE, Q35PCIHost, 177 mch.pci_hole64_size, Q35_PCI_HOST_HOLE64_SIZE_DEFAULT), 178 DEFINE_PROP_SIZE(PCI_HOST_BELOW_4G_MEM_SIZE, Q35PCIHost, 179 mch.below_4g_mem_size, 0), 180 DEFINE_PROP_SIZE(PCI_HOST_ABOVE_4G_MEM_SIZE, Q35PCIHost, 181 mch.above_4g_mem_size, 0), 182 DEFINE_PROP_BOOL("x-pci-hole64-fix", Q35PCIHost, pci_hole64_fix, true), 183 DEFINE_PROP_END_OF_LIST(), 184 }; 185 186 static void q35_host_class_init(ObjectClass *klass, void *data) 187 { 188 DeviceClass *dc = DEVICE_CLASS(klass); 189 PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_CLASS(klass); 190 191 hc->root_bus_path = q35_host_root_bus_path; 192 dc->realize = q35_host_realize; 193 device_class_set_props(dc, q35_host_props); 194 /* Reason: needs to be wired up by pc_q35_init */ 195 dc->user_creatable = false; 196 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories); 197 dc->fw_name = "pci"; 198 } 199 200 static void q35_host_initfn(Object *obj) 201 { 202 Q35PCIHost *s = Q35_HOST_DEVICE(obj); 203 PCIHostState *phb = PCI_HOST_BRIDGE(obj); 204 PCIExpressHost *pehb = PCIE_HOST_BRIDGE(obj); 205 206 memory_region_init_io(&phb->conf_mem, obj, &pci_host_conf_le_ops, phb, 207 "pci-conf-idx", 4); 208 memory_region_init_io(&phb->data_mem, obj, &pci_host_data_le_ops, phb, 209 "pci-conf-data", 4); 210 211 object_initialize_child(OBJECT(s), "mch", &s->mch, TYPE_MCH_PCI_DEVICE); 212 qdev_prop_set_int32(DEVICE(&s->mch), "addr", PCI_DEVFN(0, 0)); 213 qdev_prop_set_bit(DEVICE(&s->mch), "multifunction", false); 214 /* mch's object_initialize resets the default value, set it again */ 215 qdev_prop_set_uint64(DEVICE(s), PCI_HOST_PROP_PCI_HOLE64_SIZE, 216 Q35_PCI_HOST_HOLE64_SIZE_DEFAULT); 217 object_property_add(obj, PCI_HOST_PROP_PCI_HOLE_START, "uint32", 218 q35_host_get_pci_hole_start, 219 NULL, NULL, NULL); 220 221 object_property_add(obj, PCI_HOST_PROP_PCI_HOLE_END, "uint32", 222 q35_host_get_pci_hole_end, 223 NULL, NULL, NULL); 224 225 object_property_add(obj, PCI_HOST_PROP_PCI_HOLE64_START, "uint64", 226 q35_host_get_pci_hole64_start, 227 NULL, NULL, NULL); 228 229 object_property_add(obj, PCI_HOST_PROP_PCI_HOLE64_END, "uint64", 230 q35_host_get_pci_hole64_end, 231 NULL, NULL, NULL); 232 233 object_property_add_uint64_ptr(obj, PCIE_HOST_MCFG_SIZE, 234 &pehb->size, OBJ_PROP_FLAG_READ); 235 236 object_property_add_link(obj, PCI_HOST_PROP_RAM_MEM, TYPE_MEMORY_REGION, 237 (Object **) &s->mch.ram_memory, 238 qdev_prop_allow_set_link_before_realize, 0); 239 240 object_property_add_link(obj, PCI_HOST_PROP_PCI_MEM, TYPE_MEMORY_REGION, 241 (Object **) &s->mch.pci_address_space, 242 qdev_prop_allow_set_link_before_realize, 0); 243 244 object_property_add_link(obj, PCI_HOST_PROP_SYSTEM_MEM, TYPE_MEMORY_REGION, 245 (Object **) &s->mch.system_memory, 246 qdev_prop_allow_set_link_before_realize, 0); 247 248 object_property_add_link(obj, PCI_HOST_PROP_IO_MEM, TYPE_MEMORY_REGION, 249 (Object **) &s->mch.address_space_io, 250 qdev_prop_allow_set_link_before_realize, 0); 251 } 252 253 static const TypeInfo q35_host_info = { 254 .name = TYPE_Q35_HOST_DEVICE, 255 .parent = TYPE_PCIE_HOST_BRIDGE, 256 .instance_size = sizeof(Q35PCIHost), 257 .instance_init = q35_host_initfn, 258 .class_init = q35_host_class_init, 259 }; 260 261 /**************************************************************************** 262 * MCH D0:F0 263 */ 264 265 static uint64_t blackhole_read(void *ptr, hwaddr reg, unsigned size) 266 { 267 return 0xffffffff; 268 } 269 270 static void blackhole_write(void *opaque, hwaddr addr, uint64_t val, 271 unsigned width) 272 { 273 /* nothing */ 274 } 275 276 static const MemoryRegionOps blackhole_ops = { 277 .read = blackhole_read, 278 .write = blackhole_write, 279 .valid.min_access_size = 1, 280 .valid.max_access_size = 4, 281 .impl.min_access_size = 4, 282 .impl.max_access_size = 4, 283 .endianness = DEVICE_LITTLE_ENDIAN, 284 }; 285 286 /* PCIe MMCFG */ 287 static void mch_update_pciexbar(MCHPCIState *mch) 288 { 289 PCIDevice *pci_dev = PCI_DEVICE(mch); 290 BusState *bus = qdev_get_parent_bus(DEVICE(mch)); 291 PCIExpressHost *pehb = PCIE_HOST_BRIDGE(bus->parent); 292 293 uint64_t pciexbar; 294 int enable; 295 uint64_t addr; 296 uint64_t addr_mask; 297 uint32_t length; 298 299 pciexbar = pci_get_quad(pci_dev->config + MCH_HOST_BRIDGE_PCIEXBAR); 300 enable = pciexbar & MCH_HOST_BRIDGE_PCIEXBAREN; 301 addr_mask = MCH_HOST_BRIDGE_PCIEXBAR_ADMSK; 302 switch (pciexbar & MCH_HOST_BRIDGE_PCIEXBAR_LENGTH_MASK) { 303 case MCH_HOST_BRIDGE_PCIEXBAR_LENGTH_256M: 304 length = 256 * 1024 * 1024; 305 break; 306 case MCH_HOST_BRIDGE_PCIEXBAR_LENGTH_128M: 307 length = 128 * 1024 * 1024; 308 addr_mask |= MCH_HOST_BRIDGE_PCIEXBAR_128ADMSK | 309 MCH_HOST_BRIDGE_PCIEXBAR_64ADMSK; 310 break; 311 case MCH_HOST_BRIDGE_PCIEXBAR_LENGTH_64M: 312 length = 64 * 1024 * 1024; 313 addr_mask |= MCH_HOST_BRIDGE_PCIEXBAR_64ADMSK; 314 break; 315 case MCH_HOST_BRIDGE_PCIEXBAR_LENGTH_RVD: 316 qemu_log_mask(LOG_GUEST_ERROR, "Q35: Reserved PCIEXBAR LENGTH\n"); 317 return; 318 default: 319 abort(); 320 } 321 addr = pciexbar & addr_mask; 322 pcie_host_mmcfg_update(pehb, enable, addr, length); 323 } 324 325 /* PAM */ 326 static void mch_update_pam(MCHPCIState *mch) 327 { 328 PCIDevice *pd = PCI_DEVICE(mch); 329 int i; 330 331 memory_region_transaction_begin(); 332 for (i = 0; i < 13; i++) { 333 pam_update(&mch->pam_regions[i], i, 334 pd->config[MCH_HOST_BRIDGE_PAM0 + DIV_ROUND_UP(i, 2)]); 335 } 336 memory_region_transaction_commit(); 337 } 338 339 /* SMRAM */ 340 static void mch_update_smram(MCHPCIState *mch) 341 { 342 PCIDevice *pd = PCI_DEVICE(mch); 343 bool h_smrame = (pd->config[MCH_HOST_BRIDGE_ESMRAMC] & MCH_HOST_BRIDGE_ESMRAMC_H_SMRAME); 344 uint32_t tseg_size; 345 346 /* implement SMRAM.D_LCK */ 347 if (pd->config[MCH_HOST_BRIDGE_SMRAM] & MCH_HOST_BRIDGE_SMRAM_D_LCK) { 348 pd->config[MCH_HOST_BRIDGE_SMRAM] &= ~MCH_HOST_BRIDGE_SMRAM_D_OPEN; 349 pd->wmask[MCH_HOST_BRIDGE_SMRAM] = MCH_HOST_BRIDGE_SMRAM_WMASK_LCK; 350 pd->wmask[MCH_HOST_BRIDGE_ESMRAMC] = MCH_HOST_BRIDGE_ESMRAMC_WMASK_LCK; 351 } 352 353 memory_region_transaction_begin(); 354 355 if (pd->config[MCH_HOST_BRIDGE_SMRAM] & SMRAM_D_OPEN) { 356 /* Hide (!) low SMRAM if H_SMRAME = 1 */ 357 memory_region_set_enabled(&mch->smram_region, h_smrame); 358 /* Show high SMRAM if H_SMRAME = 1 */ 359 memory_region_set_enabled(&mch->open_high_smram, h_smrame); 360 } else { 361 /* Hide high SMRAM and low SMRAM */ 362 memory_region_set_enabled(&mch->smram_region, true); 363 memory_region_set_enabled(&mch->open_high_smram, false); 364 } 365 366 if (pd->config[MCH_HOST_BRIDGE_SMRAM] & SMRAM_G_SMRAME) { 367 memory_region_set_enabled(&mch->low_smram, !h_smrame); 368 memory_region_set_enabled(&mch->high_smram, h_smrame); 369 } else { 370 memory_region_set_enabled(&mch->low_smram, false); 371 memory_region_set_enabled(&mch->high_smram, false); 372 } 373 374 if ((pd->config[MCH_HOST_BRIDGE_ESMRAMC] & MCH_HOST_BRIDGE_ESMRAMC_T_EN) && 375 (pd->config[MCH_HOST_BRIDGE_SMRAM] & SMRAM_G_SMRAME)) { 376 switch (pd->config[MCH_HOST_BRIDGE_ESMRAMC] & 377 MCH_HOST_BRIDGE_ESMRAMC_TSEG_SZ_MASK) { 378 case MCH_HOST_BRIDGE_ESMRAMC_TSEG_SZ_1MB: 379 tseg_size = 1024 * 1024; 380 break; 381 case MCH_HOST_BRIDGE_ESMRAMC_TSEG_SZ_2MB: 382 tseg_size = 1024 * 1024 * 2; 383 break; 384 case MCH_HOST_BRIDGE_ESMRAMC_TSEG_SZ_8MB: 385 tseg_size = 1024 * 1024 * 8; 386 break; 387 default: 388 tseg_size = 1024 * 1024 * (uint32_t)mch->ext_tseg_mbytes; 389 break; 390 } 391 } else { 392 tseg_size = 0; 393 } 394 memory_region_del_subregion(mch->system_memory, &mch->tseg_blackhole); 395 memory_region_set_enabled(&mch->tseg_blackhole, tseg_size); 396 memory_region_set_size(&mch->tseg_blackhole, tseg_size); 397 memory_region_add_subregion_overlap(mch->system_memory, 398 mch->below_4g_mem_size - tseg_size, 399 &mch->tseg_blackhole, 1); 400 401 memory_region_set_enabled(&mch->tseg_window, tseg_size); 402 memory_region_set_size(&mch->tseg_window, tseg_size); 403 memory_region_set_address(&mch->tseg_window, 404 mch->below_4g_mem_size - tseg_size); 405 memory_region_set_alias_offset(&mch->tseg_window, 406 mch->below_4g_mem_size - tseg_size); 407 408 memory_region_transaction_commit(); 409 } 410 411 static void mch_update_ext_tseg_mbytes(MCHPCIState *mch) 412 { 413 PCIDevice *pd = PCI_DEVICE(mch); 414 uint8_t *reg = pd->config + MCH_HOST_BRIDGE_EXT_TSEG_MBYTES; 415 416 if (mch->ext_tseg_mbytes > 0 && 417 pci_get_word(reg) == MCH_HOST_BRIDGE_EXT_TSEG_MBYTES_QUERY) { 418 pci_set_word(reg, mch->ext_tseg_mbytes); 419 } 420 } 421 422 static void mch_update_smbase_smram(MCHPCIState *mch) 423 { 424 PCIDevice *pd = PCI_DEVICE(mch); 425 uint8_t *reg = pd->config + MCH_HOST_BRIDGE_F_SMBASE; 426 bool lck; 427 428 if (!mch->has_smram_at_smbase) { 429 return; 430 } 431 432 if (*reg == MCH_HOST_BRIDGE_F_SMBASE_QUERY) { 433 pd->wmask[MCH_HOST_BRIDGE_F_SMBASE] = 434 MCH_HOST_BRIDGE_F_SMBASE_LCK; 435 *reg = MCH_HOST_BRIDGE_F_SMBASE_IN_RAM; 436 return; 437 } 438 439 /* 440 * default/reset state, discard written value 441 * which will disable SMRAM balackhole at SMBASE 442 */ 443 if (pd->wmask[MCH_HOST_BRIDGE_F_SMBASE] == 0xff) { 444 *reg = 0x00; 445 } 446 447 memory_region_transaction_begin(); 448 if (*reg & MCH_HOST_BRIDGE_F_SMBASE_LCK) { 449 /* disable all writes */ 450 pd->wmask[MCH_HOST_BRIDGE_F_SMBASE] &= 451 ~MCH_HOST_BRIDGE_F_SMBASE_LCK; 452 *reg = MCH_HOST_BRIDGE_F_SMBASE_LCK; 453 lck = true; 454 } else { 455 lck = false; 456 } 457 memory_region_set_enabled(&mch->smbase_blackhole, lck); 458 memory_region_set_enabled(&mch->smbase_window, lck); 459 memory_region_transaction_commit(); 460 } 461 462 static void mch_write_config(PCIDevice *d, 463 uint32_t address, uint32_t val, int len) 464 { 465 MCHPCIState *mch = MCH_PCI_DEVICE(d); 466 467 pci_default_write_config(d, address, val, len); 468 469 if (ranges_overlap(address, len, MCH_HOST_BRIDGE_PAM0, 470 MCH_HOST_BRIDGE_PAM_SIZE)) { 471 mch_update_pam(mch); 472 } 473 474 if (ranges_overlap(address, len, MCH_HOST_BRIDGE_PCIEXBAR, 475 MCH_HOST_BRIDGE_PCIEXBAR_SIZE)) { 476 mch_update_pciexbar(mch); 477 } 478 479 if (ranges_overlap(address, len, MCH_HOST_BRIDGE_SMRAM, 480 MCH_HOST_BRIDGE_SMRAM_SIZE)) { 481 mch_update_smram(mch); 482 } 483 484 if (ranges_overlap(address, len, MCH_HOST_BRIDGE_EXT_TSEG_MBYTES, 485 MCH_HOST_BRIDGE_EXT_TSEG_MBYTES_SIZE)) { 486 mch_update_ext_tseg_mbytes(mch); 487 } 488 489 if (ranges_overlap(address, len, MCH_HOST_BRIDGE_F_SMBASE, 1)) { 490 mch_update_smbase_smram(mch); 491 } 492 } 493 494 static void mch_update(MCHPCIState *mch) 495 { 496 mch_update_pciexbar(mch); 497 mch_update_pam(mch); 498 mch_update_smram(mch); 499 mch_update_ext_tseg_mbytes(mch); 500 mch_update_smbase_smram(mch); 501 502 /* 503 * pci hole goes from end-of-low-ram to io-apic. 504 * mmconfig will be excluded by the dsdt builder. 505 */ 506 range_set_bounds(&mch->pci_hole, 507 mch->below_4g_mem_size, 508 IO_APIC_DEFAULT_ADDRESS - 1); 509 } 510 511 static int mch_post_load(void *opaque, int version_id) 512 { 513 MCHPCIState *mch = opaque; 514 mch_update(mch); 515 return 0; 516 } 517 518 static const VMStateDescription vmstate_mch = { 519 .name = "mch", 520 .version_id = 1, 521 .minimum_version_id = 1, 522 .post_load = mch_post_load, 523 .fields = (const VMStateField[]) { 524 VMSTATE_PCI_DEVICE(parent_obj, MCHPCIState), 525 /* Used to be smm_enabled, which was basically always zero because 526 * SeaBIOS hardly uses SMM. SMRAM is now handled by CPU code. 527 */ 528 VMSTATE_UNUSED(1), 529 VMSTATE_END_OF_LIST() 530 } 531 }; 532 533 static void mch_reset(DeviceState *qdev) 534 { 535 PCIDevice *d = PCI_DEVICE(qdev); 536 MCHPCIState *mch = MCH_PCI_DEVICE(d); 537 538 pci_set_quad(d->config + MCH_HOST_BRIDGE_PCIEXBAR, 539 MCH_HOST_BRIDGE_PCIEXBAR_DEFAULT); 540 541 d->config[MCH_HOST_BRIDGE_SMRAM] = MCH_HOST_BRIDGE_SMRAM_DEFAULT; 542 d->config[MCH_HOST_BRIDGE_ESMRAMC] = MCH_HOST_BRIDGE_ESMRAMC_DEFAULT; 543 d->wmask[MCH_HOST_BRIDGE_SMRAM] = MCH_HOST_BRIDGE_SMRAM_WMASK; 544 d->wmask[MCH_HOST_BRIDGE_ESMRAMC] = MCH_HOST_BRIDGE_ESMRAMC_WMASK; 545 546 if (mch->ext_tseg_mbytes > 0) { 547 pci_set_word(d->config + MCH_HOST_BRIDGE_EXT_TSEG_MBYTES, 548 MCH_HOST_BRIDGE_EXT_TSEG_MBYTES_QUERY); 549 } 550 551 d->config[MCH_HOST_BRIDGE_F_SMBASE] = 0; 552 d->wmask[MCH_HOST_BRIDGE_F_SMBASE] = 0xff; 553 554 mch_update(mch); 555 } 556 557 static void mch_realize(PCIDevice *d, Error **errp) 558 { 559 int i; 560 MCHPCIState *mch = MCH_PCI_DEVICE(d); 561 562 if (mch->ext_tseg_mbytes > MCH_HOST_BRIDGE_EXT_TSEG_MBYTES_MAX) { 563 error_setg(errp, "invalid extended-tseg-mbytes value: %" PRIu16, 564 mch->ext_tseg_mbytes); 565 return; 566 } 567 568 /* setup pci memory mapping */ 569 pc_pci_as_mapping_init(mch->system_memory, mch->pci_address_space); 570 571 /* if *disabled* show SMRAM to all CPUs */ 572 memory_region_init_alias(&mch->smram_region, OBJECT(mch), "smram-region", 573 mch->pci_address_space, MCH_HOST_BRIDGE_SMRAM_C_BASE, 574 MCH_HOST_BRIDGE_SMRAM_C_SIZE); 575 memory_region_add_subregion_overlap(mch->system_memory, MCH_HOST_BRIDGE_SMRAM_C_BASE, 576 &mch->smram_region, 1); 577 memory_region_set_enabled(&mch->smram_region, true); 578 579 memory_region_init_alias(&mch->open_high_smram, OBJECT(mch), "smram-open-high", 580 mch->ram_memory, MCH_HOST_BRIDGE_SMRAM_C_BASE, 581 MCH_HOST_BRIDGE_SMRAM_C_SIZE); 582 memory_region_add_subregion_overlap(mch->system_memory, 0xfeda0000, 583 &mch->open_high_smram, 1); 584 memory_region_set_enabled(&mch->open_high_smram, false); 585 586 /* smram, as seen by SMM CPUs */ 587 memory_region_init(&mch->smram, OBJECT(mch), "smram", 4 * GiB); 588 memory_region_set_enabled(&mch->smram, true); 589 memory_region_init_alias(&mch->low_smram, OBJECT(mch), "smram-low", 590 mch->ram_memory, MCH_HOST_BRIDGE_SMRAM_C_BASE, 591 MCH_HOST_BRIDGE_SMRAM_C_SIZE); 592 memory_region_set_enabled(&mch->low_smram, true); 593 memory_region_add_subregion(&mch->smram, MCH_HOST_BRIDGE_SMRAM_C_BASE, 594 &mch->low_smram); 595 memory_region_init_alias(&mch->high_smram, OBJECT(mch), "smram-high", 596 mch->ram_memory, MCH_HOST_BRIDGE_SMRAM_C_BASE, 597 MCH_HOST_BRIDGE_SMRAM_C_SIZE); 598 memory_region_set_enabled(&mch->high_smram, true); 599 memory_region_add_subregion(&mch->smram, 0xfeda0000, &mch->high_smram); 600 601 memory_region_init_io(&mch->tseg_blackhole, OBJECT(mch), 602 &blackhole_ops, NULL, 603 "tseg-blackhole", 0); 604 memory_region_set_enabled(&mch->tseg_blackhole, false); 605 memory_region_add_subregion_overlap(mch->system_memory, 606 mch->below_4g_mem_size, 607 &mch->tseg_blackhole, 1); 608 609 memory_region_init_alias(&mch->tseg_window, OBJECT(mch), "tseg-window", 610 mch->ram_memory, mch->below_4g_mem_size, 0); 611 memory_region_set_enabled(&mch->tseg_window, false); 612 memory_region_add_subregion(&mch->smram, mch->below_4g_mem_size, 613 &mch->tseg_window); 614 615 /* 616 * This is not what hardware does, so it's QEMU specific hack. 617 * See commit message for details. 618 */ 619 memory_region_init_io(&mch->smbase_blackhole, OBJECT(mch), &blackhole_ops, 620 NULL, "smbase-blackhole", 621 MCH_HOST_BRIDGE_SMBASE_SIZE); 622 memory_region_set_enabled(&mch->smbase_blackhole, false); 623 memory_region_add_subregion_overlap(mch->system_memory, 624 MCH_HOST_BRIDGE_SMBASE_ADDR, 625 &mch->smbase_blackhole, 1); 626 627 memory_region_init_alias(&mch->smbase_window, OBJECT(mch), 628 "smbase-window", mch->ram_memory, 629 MCH_HOST_BRIDGE_SMBASE_ADDR, 630 MCH_HOST_BRIDGE_SMBASE_SIZE); 631 memory_region_set_enabled(&mch->smbase_window, false); 632 memory_region_add_subregion(&mch->smram, MCH_HOST_BRIDGE_SMBASE_ADDR, 633 &mch->smbase_window); 634 635 object_property_add_const_link(qdev_get_machine(), "smram", 636 OBJECT(&mch->smram)); 637 638 init_pam(&mch->pam_regions[0], OBJECT(mch), mch->ram_memory, 639 mch->system_memory, mch->pci_address_space, 640 PAM_BIOS_BASE, PAM_BIOS_SIZE); 641 for (i = 0; i < ARRAY_SIZE(mch->pam_regions) - 1; ++i) { 642 init_pam(&mch->pam_regions[i + 1], OBJECT(mch), mch->ram_memory, 643 mch->system_memory, mch->pci_address_space, 644 PAM_EXPAN_BASE + i * PAM_EXPAN_SIZE, PAM_EXPAN_SIZE); 645 } 646 } 647 648 uint64_t mch_mcfg_base(void) 649 { 650 bool ambiguous; 651 Object *o = object_resolve_path_type("", TYPE_MCH_PCI_DEVICE, &ambiguous); 652 if (!o) { 653 return 0; 654 } 655 return MCH_HOST_BRIDGE_PCIEXBAR_DEFAULT; 656 } 657 658 static Property mch_props[] = { 659 DEFINE_PROP_UINT16("extended-tseg-mbytes", MCHPCIState, ext_tseg_mbytes, 660 16), 661 DEFINE_PROP_BOOL("smbase-smram", MCHPCIState, has_smram_at_smbase, true), 662 DEFINE_PROP_END_OF_LIST(), 663 }; 664 665 static void mch_class_init(ObjectClass *klass, void *data) 666 { 667 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 668 DeviceClass *dc = DEVICE_CLASS(klass); 669 670 k->realize = mch_realize; 671 k->config_write = mch_write_config; 672 dc->reset = mch_reset; 673 device_class_set_props(dc, mch_props); 674 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories); 675 dc->desc = "Host bridge"; 676 dc->vmsd = &vmstate_mch; 677 k->vendor_id = PCI_VENDOR_ID_INTEL; 678 /* 679 * The 'q35' machine type implements an Intel Series 3 chipset, 680 * of which there are several variants. The key difference between 681 * the 82P35 MCH ('p35') and 82Q35 GMCH ('q35') variants is that 682 * the latter has an integrated graphics adapter. QEMU does not 683 * implement integrated graphics, so uses the PCI ID for the 82P35 684 * chipset. 685 */ 686 k->device_id = PCI_DEVICE_ID_INTEL_P35_MCH; 687 k->revision = MCH_HOST_BRIDGE_REVISION_DEFAULT; 688 k->class_id = PCI_CLASS_BRIDGE_HOST; 689 /* 690 * PCI-facing part of the host bridge, not usable without the 691 * host-facing part, which can't be device_add'ed, yet. 692 */ 693 dc->user_creatable = false; 694 } 695 696 static const TypeInfo mch_info = { 697 .name = TYPE_MCH_PCI_DEVICE, 698 .parent = TYPE_PCI_DEVICE, 699 .instance_size = sizeof(MCHPCIState), 700 .class_init = mch_class_init, 701 .interfaces = (InterfaceInfo[]) { 702 { INTERFACE_CONVENTIONAL_PCI_DEVICE }, 703 { }, 704 }, 705 }; 706 707 static void q35_register(void) 708 { 709 type_register_static(&mch_info); 710 type_register_static(&q35_host_info); 711 } 712 713 type_init(q35_register); 714