1 /* Support for generating ACPI tables and passing them to Guests 2 * 3 * Copyright (C) 2008-2010 Kevin O'Connor <kevin@koconnor.net> 4 * Copyright (C) 2006 Fabrice Bellard 5 * Copyright (C) 2013 Red Hat Inc 6 * 7 * Author: Michael S. Tsirkin <mst@redhat.com> 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (at your option) any later version. 13 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 19 * You should have received a copy of the GNU General Public License along 20 * with this program; if not, see <http://www.gnu.org/licenses/>. 21 */ 22 23 #include "acpi-build.h" 24 #include <stddef.h> 25 #include <glib.h> 26 #include "qemu-common.h" 27 #include "qemu/bitmap.h" 28 #include "qemu/range.h" 29 #include "hw/pci/pci.h" 30 #include "qom/cpu.h" 31 #include "hw/i386/pc.h" 32 #include "target-i386/cpu.h" 33 #include "hw/timer/hpet.h" 34 #include "hw/i386/acpi-defs.h" 35 #include "hw/acpi/acpi.h" 36 #include "hw/nvram/fw_cfg.h" 37 #include "bios-linker-loader.h" 38 #include "hw/loader.h" 39 40 /* Supported chipsets: */ 41 #include "hw/acpi/piix4.h" 42 #include "hw/i386/ich9.h" 43 #include "hw/pci/pci_bus.h" 44 #include "hw/pci-host/q35.h" 45 46 #include "hw/i386/q35-acpi-dsdt.hex" 47 #include "hw/i386/acpi-dsdt.hex" 48 49 #include "qapi/qmp/qint.h" 50 #include "qom/qom-qobject.h" 51 52 typedef struct AcpiCpuInfo { 53 DECLARE_BITMAP(found_cpus, MAX_CPUMASK_BITS + 1); 54 } AcpiCpuInfo; 55 56 typedef struct AcpiMcfgInfo { 57 uint64_t mcfg_base; 58 uint32_t mcfg_size; 59 } AcpiMcfgInfo; 60 61 typedef struct AcpiPmInfo { 62 bool s3_disabled; 63 bool s4_disabled; 64 uint8_t s4_val; 65 uint16_t sci_int; 66 uint8_t acpi_enable_cmd; 67 uint8_t acpi_disable_cmd; 68 uint32_t gpe0_blk; 69 uint32_t gpe0_blk_len; 70 uint32_t io_base; 71 } AcpiPmInfo; 72 73 typedef struct AcpiMiscInfo { 74 bool has_hpet; 75 DECLARE_BITMAP(slot_hotplug_enable, PCI_SLOT_MAX); 76 const unsigned char *dsdt_code; 77 unsigned dsdt_size; 78 uint16_t pvpanic_port; 79 } AcpiMiscInfo; 80 81 static void acpi_get_dsdt(AcpiMiscInfo *info) 82 { 83 Object *piix = piix4_pm_find(); 84 Object *lpc = ich9_lpc_find(); 85 assert(!!piix != !!lpc); 86 87 if (piix) { 88 info->dsdt_code = AcpiDsdtAmlCode; 89 info->dsdt_size = sizeof AcpiDsdtAmlCode; 90 } 91 if (lpc) { 92 info->dsdt_code = Q35AcpiDsdtAmlCode; 93 info->dsdt_size = sizeof Q35AcpiDsdtAmlCode; 94 } 95 } 96 97 static 98 int acpi_add_cpu_info(Object *o, void *opaque) 99 { 100 AcpiCpuInfo *cpu = opaque; 101 uint64_t apic_id; 102 103 if (object_dynamic_cast(o, TYPE_CPU)) { 104 apic_id = object_property_get_int(o, "apic-id", NULL); 105 assert(apic_id <= MAX_CPUMASK_BITS); 106 107 set_bit(apic_id, cpu->found_cpus); 108 } 109 110 object_child_foreach(o, acpi_add_cpu_info, opaque); 111 return 0; 112 } 113 114 static void acpi_get_cpu_info(AcpiCpuInfo *cpu) 115 { 116 Object *root = object_get_root(); 117 118 memset(cpu->found_cpus, 0, sizeof cpu->found_cpus); 119 object_child_foreach(root, acpi_add_cpu_info, cpu); 120 } 121 122 static void acpi_get_pm_info(AcpiPmInfo *pm) 123 { 124 Object *piix = piix4_pm_find(); 125 Object *lpc = ich9_lpc_find(); 126 Object *obj = NULL; 127 QObject *o; 128 129 if (piix) { 130 obj = piix; 131 } 132 if (lpc) { 133 obj = lpc; 134 } 135 assert(obj); 136 137 /* Fill in optional s3/s4 related properties */ 138 o = object_property_get_qobject(obj, ACPI_PM_PROP_S3_DISABLED, NULL); 139 if (o) { 140 pm->s3_disabled = qint_get_int(qobject_to_qint(o)); 141 } else { 142 pm->s3_disabled = false; 143 } 144 o = object_property_get_qobject(obj, ACPI_PM_PROP_S4_DISABLED, NULL); 145 if (o) { 146 pm->s4_disabled = qint_get_int(qobject_to_qint(o)); 147 } else { 148 pm->s4_disabled = false; 149 } 150 o = object_property_get_qobject(obj, ACPI_PM_PROP_S4_VAL, NULL); 151 if (o) { 152 pm->s4_val = qint_get_int(qobject_to_qint(o)); 153 } else { 154 pm->s4_val = false; 155 } 156 157 /* Fill in mandatory properties */ 158 pm->sci_int = object_property_get_int(obj, ACPI_PM_PROP_SCI_INT, NULL); 159 160 pm->acpi_enable_cmd = object_property_get_int(obj, 161 ACPI_PM_PROP_ACPI_ENABLE_CMD, 162 NULL); 163 pm->acpi_disable_cmd = object_property_get_int(obj, 164 ACPI_PM_PROP_ACPI_DISABLE_CMD, 165 NULL); 166 pm->io_base = object_property_get_int(obj, ACPI_PM_PROP_PM_IO_BASE, 167 NULL); 168 pm->gpe0_blk = object_property_get_int(obj, ACPI_PM_PROP_GPE0_BLK, 169 NULL); 170 pm->gpe0_blk_len = object_property_get_int(obj, ACPI_PM_PROP_GPE0_BLK_LEN, 171 NULL); 172 } 173 174 static void acpi_get_hotplug_info(AcpiMiscInfo *misc) 175 { 176 int i; 177 PCIBus *bus = find_i440fx(); 178 179 if (!bus) { 180 /* Only PIIX supports ACPI hotplug */ 181 memset(misc->slot_hotplug_enable, 0, sizeof misc->slot_hotplug_enable); 182 return; 183 } 184 185 memset(misc->slot_hotplug_enable, 0xff, 186 DIV_ROUND_UP(PCI_SLOT_MAX, BITS_PER_BYTE)); 187 188 for (i = 0; i < ARRAY_SIZE(bus->devices); ++i) { 189 PCIDeviceClass *pc; 190 PCIDevice *pdev = bus->devices[i]; 191 192 if (!pdev) { 193 continue; 194 } 195 196 pc = PCI_DEVICE_GET_CLASS(pdev); 197 198 if (pc->no_hotplug) { 199 int slot = PCI_SLOT(i); 200 201 clear_bit(slot, misc->slot_hotplug_enable); 202 } 203 } 204 } 205 206 static void acpi_get_misc_info(AcpiMiscInfo *info) 207 { 208 info->has_hpet = hpet_find(); 209 info->pvpanic_port = pvpanic_port(); 210 } 211 212 static void acpi_get_pci_info(PcPciInfo *info) 213 { 214 Object *pci_host; 215 bool ambiguous; 216 217 pci_host = object_resolve_path_type("", TYPE_PCI_HOST_BRIDGE, &ambiguous); 218 g_assert(!ambiguous); 219 g_assert(pci_host); 220 221 info->w32.begin = object_property_get_int(pci_host, 222 PCI_HOST_PROP_PCI_HOLE_START, 223 NULL); 224 info->w32.end = object_property_get_int(pci_host, 225 PCI_HOST_PROP_PCI_HOLE_END, 226 NULL); 227 info->w64.begin = object_property_get_int(pci_host, 228 PCI_HOST_PROP_PCI_HOLE64_START, 229 NULL); 230 info->w64.end = object_property_get_int(pci_host, 231 PCI_HOST_PROP_PCI_HOLE64_END, 232 NULL); 233 } 234 235 #define ACPI_BUILD_APPNAME "Bochs" 236 #define ACPI_BUILD_APPNAME6 "BOCHS " 237 #define ACPI_BUILD_APPNAME4 "BXPC" 238 239 #define ACPI_BUILD_DPRINTF(level, fmt, ...) do {} while (0) 240 241 #define ACPI_BUILD_TABLE_FILE "etc/acpi/tables" 242 #define ACPI_BUILD_RSDP_FILE "etc/acpi/rsdp" 243 244 static void 245 build_header(GArray *linker, GArray *table_data, 246 AcpiTableHeader *h, uint32_t sig, int len, uint8_t rev) 247 { 248 h->signature = cpu_to_le32(sig); 249 h->length = cpu_to_le32(len); 250 h->revision = rev; 251 memcpy(h->oem_id, ACPI_BUILD_APPNAME6, 6); 252 memcpy(h->oem_table_id, ACPI_BUILD_APPNAME4, 4); 253 memcpy(h->oem_table_id + 4, (void *)&sig, 4); 254 h->oem_revision = cpu_to_le32(1); 255 memcpy(h->asl_compiler_id, ACPI_BUILD_APPNAME4, 4); 256 h->asl_compiler_revision = cpu_to_le32(1); 257 h->checksum = 0; 258 /* Checksum to be filled in by Guest linker */ 259 bios_linker_loader_add_checksum(linker, ACPI_BUILD_TABLE_FILE, 260 table_data->data, h, len, &h->checksum); 261 } 262 263 static inline GArray *build_alloc_array(void) 264 { 265 return g_array_new(false, true /* clear */, 1); 266 } 267 268 static inline void build_free_array(GArray *array) 269 { 270 g_array_free(array, true); 271 } 272 273 static inline void build_prepend_byte(GArray *array, uint8_t val) 274 { 275 g_array_prepend_val(array, val); 276 } 277 278 static inline void build_append_byte(GArray *array, uint8_t val) 279 { 280 g_array_append_val(array, val); 281 } 282 283 static inline void build_append_array(GArray *array, GArray *val) 284 { 285 g_array_append_vals(array, val->data, val->len); 286 } 287 288 static void GCC_FMT_ATTR(2, 3) 289 build_append_nameseg(GArray *array, const char *format, ...) 290 { 291 /* It would be nicer to use g_string_vprintf but it's only there in 2.22 */ 292 char s[] = "XXXX"; 293 int len; 294 va_list args; 295 296 va_start(args, format); 297 len = vsnprintf(s, sizeof s, format, args); 298 va_end(args); 299 300 assert(len == 4); 301 g_array_append_vals(array, s, len); 302 } 303 304 /* 5.4 Definition Block Encoding */ 305 enum { 306 PACKAGE_LENGTH_1BYTE_SHIFT = 6, /* Up to 63 - use extra 2 bits. */ 307 PACKAGE_LENGTH_2BYTE_SHIFT = 4, 308 PACKAGE_LENGTH_3BYTE_SHIFT = 12, 309 PACKAGE_LENGTH_4BYTE_SHIFT = 20, 310 }; 311 312 static void build_prepend_package_length(GArray *package, unsigned min_bytes) 313 { 314 uint8_t byte; 315 unsigned length = package->len; 316 unsigned length_bytes; 317 318 if (length + 1 < (1 << PACKAGE_LENGTH_1BYTE_SHIFT)) { 319 length_bytes = 1; 320 } else if (length + 2 < (1 << PACKAGE_LENGTH_3BYTE_SHIFT)) { 321 length_bytes = 2; 322 } else if (length + 3 < (1 << PACKAGE_LENGTH_4BYTE_SHIFT)) { 323 length_bytes = 3; 324 } else { 325 length_bytes = 4; 326 } 327 328 /* Force length to at least min_bytes. 329 * This wastes memory but that's how bios did it. 330 */ 331 length_bytes = MAX(length_bytes, min_bytes); 332 333 /* PkgLength is the length of the inclusive length of the data. */ 334 length += length_bytes; 335 336 switch (length_bytes) { 337 case 1: 338 byte = length; 339 build_prepend_byte(package, byte); 340 return; 341 case 4: 342 byte = length >> PACKAGE_LENGTH_4BYTE_SHIFT; 343 build_prepend_byte(package, byte); 344 length &= (1 << PACKAGE_LENGTH_4BYTE_SHIFT) - 1; 345 /* fall through */ 346 case 3: 347 byte = length >> PACKAGE_LENGTH_3BYTE_SHIFT; 348 build_prepend_byte(package, byte); 349 length &= (1 << PACKAGE_LENGTH_3BYTE_SHIFT) - 1; 350 /* fall through */ 351 case 2: 352 byte = length >> PACKAGE_LENGTH_2BYTE_SHIFT; 353 build_prepend_byte(package, byte); 354 length &= (1 << PACKAGE_LENGTH_2BYTE_SHIFT) - 1; 355 /* fall through */ 356 } 357 /* 358 * Most significant two bits of byte zero indicate how many following bytes 359 * are in PkgLength encoding. 360 */ 361 byte = ((length_bytes - 1) << PACKAGE_LENGTH_1BYTE_SHIFT) | length; 362 build_prepend_byte(package, byte); 363 } 364 365 static void build_package(GArray *package, uint8_t op, unsigned min_bytes) 366 { 367 build_prepend_package_length(package, min_bytes); 368 build_prepend_byte(package, op); 369 } 370 371 static void build_append_value(GArray *table, uint32_t value, int size) 372 { 373 uint8_t prefix; 374 int i; 375 376 switch (size) { 377 case 1: 378 prefix = 0x0A; /* BytePrefix */ 379 break; 380 case 2: 381 prefix = 0x0B; /* WordPrefix */ 382 break; 383 case 4: 384 prefix = 0x0C; /* DWordPrefix */ 385 break; 386 default: 387 assert(0); 388 return; 389 } 390 build_append_byte(table, prefix); 391 for (i = 0; i < size; ++i) { 392 build_append_byte(table, value & 0xFF); 393 value = value >> 8; 394 } 395 } 396 397 static void build_append_notify_target(GArray *method, GArray *target_name, 398 uint32_t value, int size) 399 { 400 GArray *notify = build_alloc_array(); 401 uint8_t op = 0xA0; /* IfOp */ 402 403 build_append_byte(notify, 0x93); /* LEqualOp */ 404 build_append_byte(notify, 0x68); /* Arg0Op */ 405 build_append_value(notify, value, size); 406 build_append_byte(notify, 0x86); /* NotifyOp */ 407 build_append_array(notify, target_name); 408 build_append_byte(notify, 0x69); /* Arg1Op */ 409 410 /* Pack it up */ 411 build_package(notify, op, 1); 412 413 build_append_array(method, notify); 414 415 build_free_array(notify); 416 } 417 418 #define ACPI_PORT_SMI_CMD 0x00b2 /* TODO: this is APM_CNT_IOPORT */ 419 420 static inline void *acpi_data_push(GArray *table_data, unsigned size) 421 { 422 unsigned off = table_data->len; 423 g_array_set_size(table_data, off + size); 424 return table_data->data + off; 425 } 426 427 static unsigned acpi_data_len(GArray *table) 428 { 429 #if GLIB_CHECK_VERSION(2, 22, 0) 430 assert(g_array_get_element_size(table) == 1); 431 #endif 432 return table->len; 433 } 434 435 static void acpi_align_size(GArray *blob, unsigned align) 436 { 437 /* Align size to multiple of given size. This reduces the chance 438 * we need to change size in the future (breaking cross version migration). 439 */ 440 g_array_set_size(blob, ROUND_UP(acpi_data_len(blob), align)); 441 } 442 443 /* Get pointer within table in a safe manner */ 444 #define ACPI_BUILD_PTR(table, size, off, type) \ 445 ((type *)(acpi_data_get_ptr(table, size, off, sizeof(type)))) 446 447 static inline void *acpi_data_get_ptr(uint8_t *table_data, unsigned table_size, 448 unsigned off, unsigned size) 449 { 450 assert(off + size > off); 451 assert(off + size <= table_size); 452 return table_data + off; 453 } 454 455 static inline void acpi_add_table(GArray *table_offsets, GArray *table_data) 456 { 457 uint32_t offset = cpu_to_le32(table_data->len); 458 g_array_append_val(table_offsets, offset); 459 } 460 461 /* FACS */ 462 static void 463 build_facs(GArray *table_data, GArray *linker, PcGuestInfo *guest_info) 464 { 465 AcpiFacsDescriptorRev1 *facs = acpi_data_push(table_data, sizeof *facs); 466 facs->signature = cpu_to_le32(ACPI_FACS_SIGNATURE); 467 facs->length = cpu_to_le32(sizeof(*facs)); 468 } 469 470 /* Load chipset information in FADT */ 471 static void fadt_setup(AcpiFadtDescriptorRev1 *fadt, AcpiPmInfo *pm) 472 { 473 fadt->model = 1; 474 fadt->reserved1 = 0; 475 fadt->sci_int = cpu_to_le16(pm->sci_int); 476 fadt->smi_cmd = cpu_to_le32(ACPI_PORT_SMI_CMD); 477 fadt->acpi_enable = pm->acpi_enable_cmd; 478 fadt->acpi_disable = pm->acpi_disable_cmd; 479 /* EVT, CNT, TMR offset matches hw/acpi/core.c */ 480 fadt->pm1a_evt_blk = cpu_to_le32(pm->io_base); 481 fadt->pm1a_cnt_blk = cpu_to_le32(pm->io_base + 0x04); 482 fadt->pm_tmr_blk = cpu_to_le32(pm->io_base + 0x08); 483 fadt->gpe0_blk = cpu_to_le32(pm->gpe0_blk); 484 /* EVT, CNT, TMR length matches hw/acpi/core.c */ 485 fadt->pm1_evt_len = 4; 486 fadt->pm1_cnt_len = 2; 487 fadt->pm_tmr_len = 4; 488 fadt->gpe0_blk_len = pm->gpe0_blk_len; 489 fadt->plvl2_lat = cpu_to_le16(0xfff); /* C2 state not supported */ 490 fadt->plvl3_lat = cpu_to_le16(0xfff); /* C3 state not supported */ 491 fadt->flags = cpu_to_le32((1 << ACPI_FADT_F_WBINVD) | 492 (1 << ACPI_FADT_F_PROC_C1) | 493 (1 << ACPI_FADT_F_SLP_BUTTON) | 494 (1 << ACPI_FADT_F_RTC_S4)); 495 fadt->flags |= cpu_to_le32(1 << ACPI_FADT_F_USE_PLATFORM_CLOCK); 496 } 497 498 499 /* FADT */ 500 static void 501 build_fadt(GArray *table_data, GArray *linker, AcpiPmInfo *pm, 502 unsigned facs, unsigned dsdt) 503 { 504 AcpiFadtDescriptorRev1 *fadt = acpi_data_push(table_data, sizeof(*fadt)); 505 506 fadt->firmware_ctrl = cpu_to_le32(facs); 507 /* FACS address to be filled by Guest linker */ 508 bios_linker_loader_add_pointer(linker, ACPI_BUILD_TABLE_FILE, 509 ACPI_BUILD_TABLE_FILE, 510 table_data, &fadt->firmware_ctrl, 511 sizeof fadt->firmware_ctrl); 512 513 fadt->dsdt = cpu_to_le32(dsdt); 514 /* DSDT address to be filled by Guest linker */ 515 bios_linker_loader_add_pointer(linker, ACPI_BUILD_TABLE_FILE, 516 ACPI_BUILD_TABLE_FILE, 517 table_data, &fadt->dsdt, 518 sizeof fadt->dsdt); 519 520 fadt_setup(fadt, pm); 521 522 build_header(linker, table_data, 523 (void *)fadt, ACPI_FACP_SIGNATURE, sizeof(*fadt), 1); 524 } 525 526 static void 527 build_madt(GArray *table_data, GArray *linker, AcpiCpuInfo *cpu, 528 PcGuestInfo *guest_info) 529 { 530 int madt_start = table_data->len; 531 532 AcpiMultipleApicTable *madt; 533 AcpiMadtIoApic *io_apic; 534 AcpiMadtIntsrcovr *intsrcovr; 535 AcpiMadtLocalNmi *local_nmi; 536 int i; 537 538 madt = acpi_data_push(table_data, sizeof *madt); 539 madt->local_apic_address = cpu_to_le32(APIC_DEFAULT_ADDRESS); 540 madt->flags = cpu_to_le32(1); 541 542 for (i = 0; i < guest_info->apic_id_limit; i++) { 543 AcpiMadtProcessorApic *apic = acpi_data_push(table_data, sizeof *apic); 544 apic->type = ACPI_APIC_PROCESSOR; 545 apic->length = sizeof(*apic); 546 apic->processor_id = i; 547 apic->local_apic_id = i; 548 if (test_bit(i, cpu->found_cpus)) { 549 apic->flags = cpu_to_le32(1); 550 } else { 551 apic->flags = cpu_to_le32(0); 552 } 553 } 554 io_apic = acpi_data_push(table_data, sizeof *io_apic); 555 io_apic->type = ACPI_APIC_IO; 556 io_apic->length = sizeof(*io_apic); 557 #define ACPI_BUILD_IOAPIC_ID 0x0 558 io_apic->io_apic_id = ACPI_BUILD_IOAPIC_ID; 559 io_apic->address = cpu_to_le32(IO_APIC_DEFAULT_ADDRESS); 560 io_apic->interrupt = cpu_to_le32(0); 561 562 if (guest_info->apic_xrupt_override) { 563 intsrcovr = acpi_data_push(table_data, sizeof *intsrcovr); 564 intsrcovr->type = ACPI_APIC_XRUPT_OVERRIDE; 565 intsrcovr->length = sizeof(*intsrcovr); 566 intsrcovr->source = 0; 567 intsrcovr->gsi = cpu_to_le32(2); 568 intsrcovr->flags = cpu_to_le16(0); /* conforms to bus specifications */ 569 } 570 for (i = 1; i < 16; i++) { 571 #define ACPI_BUILD_PCI_IRQS ((1<<5) | (1<<9) | (1<<10) | (1<<11)) 572 if (!(ACPI_BUILD_PCI_IRQS & (1 << i))) { 573 /* No need for a INT source override structure. */ 574 continue; 575 } 576 intsrcovr = acpi_data_push(table_data, sizeof *intsrcovr); 577 intsrcovr->type = ACPI_APIC_XRUPT_OVERRIDE; 578 intsrcovr->length = sizeof(*intsrcovr); 579 intsrcovr->source = i; 580 intsrcovr->gsi = cpu_to_le32(i); 581 intsrcovr->flags = cpu_to_le16(0xd); /* active high, level triggered */ 582 } 583 584 local_nmi = acpi_data_push(table_data, sizeof *local_nmi); 585 local_nmi->type = ACPI_APIC_LOCAL_NMI; 586 local_nmi->length = sizeof(*local_nmi); 587 local_nmi->processor_id = 0xff; /* all processors */ 588 local_nmi->flags = cpu_to_le16(0); 589 local_nmi->lint = 1; /* ACPI_LINT1 */ 590 591 build_header(linker, table_data, 592 (void *)(table_data->data + madt_start), ACPI_APIC_SIGNATURE, 593 table_data->len - madt_start, 1); 594 } 595 596 /* Encode a hex value */ 597 static inline char acpi_get_hex(uint32_t val) 598 { 599 val &= 0x0f; 600 return (val <= 9) ? ('0' + val) : ('A' + val - 10); 601 } 602 603 #include "hw/i386/ssdt-proc.hex" 604 605 /* 0x5B 0x83 ProcessorOp PkgLength NameString ProcID */ 606 #define ACPI_PROC_OFFSET_CPUHEX (*ssdt_proc_name - *ssdt_proc_start + 2) 607 #define ACPI_PROC_OFFSET_CPUID1 (*ssdt_proc_name - *ssdt_proc_start + 4) 608 #define ACPI_PROC_OFFSET_CPUID2 (*ssdt_proc_id - *ssdt_proc_start) 609 #define ACPI_PROC_SIZEOF (*ssdt_proc_end - *ssdt_proc_start) 610 #define ACPI_PROC_AML (ssdp_proc_aml + *ssdt_proc_start) 611 612 /* 0x5B 0x82 DeviceOp PkgLength NameString */ 613 #define ACPI_PCIHP_OFFSET_HEX (*ssdt_pcihp_name - *ssdt_pcihp_start + 1) 614 #define ACPI_PCIHP_OFFSET_ID (*ssdt_pcihp_id - *ssdt_pcihp_start) 615 #define ACPI_PCIHP_OFFSET_ADR (*ssdt_pcihp_adr - *ssdt_pcihp_start) 616 #define ACPI_PCIHP_OFFSET_EJ0 (*ssdt_pcihp_ej0 - *ssdt_pcihp_start) 617 #define ACPI_PCIHP_SIZEOF (*ssdt_pcihp_end - *ssdt_pcihp_start) 618 #define ACPI_PCIHP_AML (ssdp_pcihp_aml + *ssdt_pcihp_start) 619 620 #define ACPI_SSDT_SIGNATURE 0x54445353 /* SSDT */ 621 #define ACPI_SSDT_HEADER_LENGTH 36 622 623 #include "hw/i386/ssdt-misc.hex" 624 #include "hw/i386/ssdt-pcihp.hex" 625 626 static void 627 build_append_notify(GArray *device, const char *name, 628 const char *format, int skip, int count) 629 { 630 int i; 631 GArray *method = build_alloc_array(); 632 uint8_t op = 0x14; /* MethodOp */ 633 634 build_append_nameseg(method, "%s", name); 635 build_append_byte(method, 0x02); /* MethodFlags: ArgCount */ 636 for (i = skip; i < count; i++) { 637 GArray *target = build_alloc_array(); 638 build_append_nameseg(target, format, i); 639 assert(i < 256); /* Fits in 1 byte */ 640 build_append_notify_target(method, target, i, 1); 641 build_free_array(target); 642 } 643 build_package(method, op, 2); 644 645 build_append_array(device, method); 646 build_free_array(method); 647 } 648 649 static void patch_pcihp(int slot, uint8_t *ssdt_ptr, uint32_t eject) 650 { 651 ssdt_ptr[ACPI_PCIHP_OFFSET_HEX] = acpi_get_hex(slot >> 4); 652 ssdt_ptr[ACPI_PCIHP_OFFSET_HEX + 1] = acpi_get_hex(slot); 653 ssdt_ptr[ACPI_PCIHP_OFFSET_ID] = slot; 654 ssdt_ptr[ACPI_PCIHP_OFFSET_ADR + 2] = slot; 655 656 /* Runtime patching of ACPI_EJ0: to disable hotplug for a slot, 657 * replace the method name: _EJ0 by ACPI_EJ0_. 658 */ 659 /* Sanity check */ 660 assert(!memcmp(ssdt_ptr + ACPI_PCIHP_OFFSET_EJ0, "_EJ0", 4)); 661 662 if (!eject) { 663 memcpy(ssdt_ptr + ACPI_PCIHP_OFFSET_EJ0, "EJ0_", 4); 664 } 665 } 666 667 static void patch_pci_windows(PcPciInfo *pci, uint8_t *start, unsigned size) 668 { 669 *ACPI_BUILD_PTR(start, size, acpi_pci32_start[0], uint32_t) = 670 cpu_to_le32(pci->w32.begin); 671 672 *ACPI_BUILD_PTR(start, size, acpi_pci32_end[0], uint32_t) = 673 cpu_to_le32(pci->w32.end - 1); 674 675 if (pci->w64.end || pci->w64.begin) { 676 *ACPI_BUILD_PTR(start, size, acpi_pci64_valid[0], uint8_t) = 1; 677 *ACPI_BUILD_PTR(start, size, acpi_pci64_start[0], uint64_t) = 678 cpu_to_le64(pci->w64.begin); 679 *ACPI_BUILD_PTR(start, size, acpi_pci64_end[0], uint64_t) = 680 cpu_to_le64(pci->w64.end - 1); 681 *ACPI_BUILD_PTR(start, size, acpi_pci64_length[0], uint64_t) = 682 cpu_to_le64(pci->w64.end - pci->w64.begin); 683 } else { 684 *ACPI_BUILD_PTR(start, size, acpi_pci64_valid[0], uint8_t) = 0; 685 } 686 } 687 688 static void 689 build_ssdt(GArray *table_data, GArray *linker, 690 AcpiCpuInfo *cpu, AcpiPmInfo *pm, AcpiMiscInfo *misc, 691 PcPciInfo *pci, PcGuestInfo *guest_info) 692 { 693 int acpi_cpus = MIN(0xff, guest_info->apic_id_limit); 694 int ssdt_start = table_data->len; 695 uint8_t *ssdt_ptr; 696 int i; 697 698 /* Copy header and patch values in the S3_ / S4_ / S5_ packages */ 699 ssdt_ptr = acpi_data_push(table_data, sizeof(ssdp_misc_aml)); 700 memcpy(ssdt_ptr, ssdp_misc_aml, sizeof(ssdp_misc_aml)); 701 if (pm->s3_disabled) { 702 ssdt_ptr[acpi_s3_name[0]] = 'X'; 703 } 704 if (pm->s4_disabled) { 705 ssdt_ptr[acpi_s4_name[0]] = 'X'; 706 } else { 707 ssdt_ptr[acpi_s4_pkg[0] + 1] = ssdt_ptr[acpi_s4_pkg[0] + 3] = 708 pm->s4_val; 709 } 710 711 patch_pci_windows(pci, ssdt_ptr, sizeof(ssdp_misc_aml)); 712 713 *(uint16_t *)(ssdt_ptr + *ssdt_isa_pest) = 714 cpu_to_le16(misc->pvpanic_port); 715 716 { 717 GArray *sb_scope = build_alloc_array(); 718 uint8_t op = 0x10; /* ScopeOp */ 719 720 build_append_nameseg(sb_scope, "_SB_"); 721 722 /* build Processor object for each processor */ 723 for (i = 0; i < acpi_cpus; i++) { 724 uint8_t *proc = acpi_data_push(sb_scope, ACPI_PROC_SIZEOF); 725 memcpy(proc, ACPI_PROC_AML, ACPI_PROC_SIZEOF); 726 proc[ACPI_PROC_OFFSET_CPUHEX] = acpi_get_hex(i >> 4); 727 proc[ACPI_PROC_OFFSET_CPUHEX+1] = acpi_get_hex(i); 728 proc[ACPI_PROC_OFFSET_CPUID1] = i; 729 proc[ACPI_PROC_OFFSET_CPUID2] = i; 730 } 731 732 /* build this code: 733 * Method(NTFY, 2) {If (LEqual(Arg0, 0x00)) {Notify(CP00, Arg1)} ...} 734 */ 735 /* Arg0 = Processor ID = APIC ID */ 736 build_append_notify(sb_scope, "NTFY", "CP%0.02X", 0, acpi_cpus); 737 738 /* build "Name(CPON, Package() { One, One, ..., Zero, Zero, ... })" */ 739 build_append_byte(sb_scope, 0x08); /* NameOp */ 740 build_append_nameseg(sb_scope, "CPON"); 741 742 { 743 GArray *package = build_alloc_array(); 744 uint8_t op = 0x12; /* PackageOp */ 745 746 build_append_byte(package, acpi_cpus); /* NumElements */ 747 for (i = 0; i < acpi_cpus; i++) { 748 uint8_t b = test_bit(i, cpu->found_cpus) ? 0x01 : 0x00; 749 build_append_byte(package, b); 750 } 751 752 build_package(package, op, 2); 753 build_append_array(sb_scope, package); 754 build_free_array(package); 755 } 756 757 { 758 GArray *pci0 = build_alloc_array(); 759 uint8_t op = 0x10; /* ScopeOp */; 760 761 build_append_nameseg(pci0, "PCI0"); 762 763 /* build Device object for each slot */ 764 for (i = 1; i < PCI_SLOT_MAX; i++) { 765 bool eject = test_bit(i, misc->slot_hotplug_enable); 766 void *pcihp = acpi_data_push(pci0, ACPI_PCIHP_SIZEOF); 767 768 memcpy(pcihp, ACPI_PCIHP_AML, ACPI_PCIHP_SIZEOF); 769 patch_pcihp(i, pcihp, eject); 770 } 771 772 build_append_notify(pci0, "PCNT", "S%0.02X_", 1, PCI_SLOT_MAX); 773 build_package(pci0, op, 3); 774 build_append_array(sb_scope, pci0); 775 build_free_array(pci0); 776 } 777 778 build_package(sb_scope, op, 3); 779 build_append_array(table_data, sb_scope); 780 build_free_array(sb_scope); 781 } 782 783 build_header(linker, table_data, 784 (void *)(table_data->data + ssdt_start), 785 ACPI_SSDT_SIGNATURE, table_data->len - ssdt_start, 1); 786 } 787 788 static void 789 build_hpet(GArray *table_data, GArray *linker) 790 { 791 Acpi20Hpet *hpet; 792 793 hpet = acpi_data_push(table_data, sizeof(*hpet)); 794 /* Note timer_block_id value must be kept in sync with value advertised by 795 * emulated hpet 796 */ 797 hpet->timer_block_id = cpu_to_le32(0x8086a201); 798 hpet->addr.address = cpu_to_le64(HPET_BASE); 799 build_header(linker, table_data, 800 (void *)hpet, ACPI_HPET_SIGNATURE, sizeof(*hpet), 1); 801 } 802 803 static void 804 acpi_build_srat_memory(AcpiSratMemoryAffinity *numamem, 805 uint64_t base, uint64_t len, int node, int enabled) 806 { 807 numamem->type = ACPI_SRAT_MEMORY; 808 numamem->length = sizeof(*numamem); 809 memset(numamem->proximity, 0, 4); 810 numamem->proximity[0] = node; 811 numamem->flags = cpu_to_le32(!!enabled); 812 numamem->base_addr = cpu_to_le64(base); 813 numamem->range_length = cpu_to_le64(len); 814 } 815 816 static void 817 build_srat(GArray *table_data, GArray *linker, 818 AcpiCpuInfo *cpu, PcGuestInfo *guest_info) 819 { 820 AcpiSystemResourceAffinityTable *srat; 821 AcpiSratProcessorAffinity *core; 822 AcpiSratMemoryAffinity *numamem; 823 824 int i; 825 uint64_t curnode; 826 int srat_start, numa_start, slots; 827 uint64_t mem_len, mem_base, next_base; 828 829 srat_start = table_data->len; 830 831 srat = acpi_data_push(table_data, sizeof *srat); 832 srat->reserved1 = cpu_to_le32(1); 833 core = (void *)(srat + 1); 834 835 for (i = 0; i < guest_info->apic_id_limit; ++i) { 836 core = acpi_data_push(table_data, sizeof *core); 837 core->type = ACPI_SRAT_PROCESSOR; 838 core->length = sizeof(*core); 839 core->local_apic_id = i; 840 curnode = guest_info->node_cpu[i]; 841 core->proximity_lo = curnode; 842 memset(core->proximity_hi, 0, 3); 843 core->local_sapic_eid = 0; 844 if (test_bit(i, cpu->found_cpus)) { 845 core->flags = cpu_to_le32(1); 846 } else { 847 core->flags = cpu_to_le32(0); 848 } 849 } 850 851 852 /* the memory map is a bit tricky, it contains at least one hole 853 * from 640k-1M and possibly another one from 3.5G-4G. 854 */ 855 next_base = 0; 856 numa_start = table_data->len; 857 858 numamem = acpi_data_push(table_data, sizeof *numamem); 859 acpi_build_srat_memory(numamem, 0, 640*1024, 0, 1); 860 next_base = 1024 * 1024; 861 for (i = 1; i < guest_info->numa_nodes + 1; ++i) { 862 mem_base = next_base; 863 mem_len = guest_info->node_mem[i - 1]; 864 if (i == 1) { 865 mem_len -= 1024 * 1024; 866 } 867 next_base = mem_base + mem_len; 868 869 /* Cut out the ACPI_PCI hole */ 870 if (mem_base <= guest_info->ram_size && 871 next_base > guest_info->ram_size) { 872 mem_len -= next_base - guest_info->ram_size; 873 if (mem_len > 0) { 874 numamem = acpi_data_push(table_data, sizeof *numamem); 875 acpi_build_srat_memory(numamem, mem_base, mem_len, i-1, 1); 876 } 877 mem_base = 1ULL << 32; 878 mem_len = next_base - guest_info->ram_size; 879 next_base += (1ULL << 32) - guest_info->ram_size; 880 } 881 numamem = acpi_data_push(table_data, sizeof *numamem); 882 acpi_build_srat_memory(numamem, mem_base, mem_len, i - 1, 1); 883 } 884 slots = (table_data->len - numa_start) / sizeof *numamem; 885 for (; slots < guest_info->numa_nodes + 2; slots++) { 886 numamem = acpi_data_push(table_data, sizeof *numamem); 887 acpi_build_srat_memory(numamem, 0, 0, 0, 0); 888 } 889 890 build_header(linker, table_data, 891 (void *)(table_data->data + srat_start), 892 ACPI_SRAT_SIGNATURE, 893 table_data->len - srat_start, 1); 894 } 895 896 static void 897 build_mcfg_q35(GArray *table_data, GArray *linker, AcpiMcfgInfo *info) 898 { 899 AcpiTableMcfg *mcfg; 900 uint32_t sig; 901 int len = sizeof(*mcfg) + 1 * sizeof(mcfg->allocation[0]); 902 903 mcfg = acpi_data_push(table_data, len); 904 mcfg->allocation[0].address = cpu_to_le64(info->mcfg_base); 905 /* Only a single allocation so no need to play with segments */ 906 mcfg->allocation[0].pci_segment = cpu_to_le16(0); 907 mcfg->allocation[0].start_bus_number = 0; 908 mcfg->allocation[0].end_bus_number = PCIE_MMCFG_BUS(info->mcfg_size - 1); 909 910 /* MCFG is used for ECAM which can be enabled or disabled by guest. 911 * To avoid table size changes (which create migration issues), 912 * always create the table even if there are no allocations, 913 * but set the signature to a reserved value in this case. 914 * ACPI spec requires OSPMs to ignore such tables. 915 */ 916 if (info->mcfg_base == PCIE_BASE_ADDR_UNMAPPED) { 917 sig = ACPI_RSRV_SIGNATURE; 918 } else { 919 sig = ACPI_MCFG_SIGNATURE; 920 } 921 build_header(linker, table_data, (void *)mcfg, sig, len, 1); 922 } 923 924 static void 925 build_dsdt(GArray *table_data, GArray *linker, AcpiMiscInfo *misc) 926 { 927 AcpiTableHeader *dsdt; 928 929 assert(misc->dsdt_code && misc->dsdt_size); 930 931 dsdt = acpi_data_push(table_data, misc->dsdt_size); 932 memcpy(dsdt, misc->dsdt_code, misc->dsdt_size); 933 934 memset(dsdt, 0, sizeof *dsdt); 935 build_header(linker, table_data, dsdt, ACPI_DSDT_SIGNATURE, 936 misc->dsdt_size, 1); 937 } 938 939 /* Build final rsdt table */ 940 static void 941 build_rsdt(GArray *table_data, GArray *linker, GArray *table_offsets) 942 { 943 AcpiRsdtDescriptorRev1 *rsdt; 944 size_t rsdt_len; 945 int i; 946 947 rsdt_len = sizeof(*rsdt) + sizeof(uint32_t) * table_offsets->len; 948 rsdt = acpi_data_push(table_data, rsdt_len); 949 memcpy(rsdt->table_offset_entry, table_offsets->data, 950 sizeof(uint32_t) * table_offsets->len); 951 for (i = 0; i < table_offsets->len; ++i) { 952 /* rsdt->table_offset_entry to be filled by Guest linker */ 953 bios_linker_loader_add_pointer(linker, 954 ACPI_BUILD_TABLE_FILE, 955 ACPI_BUILD_TABLE_FILE, 956 table_data, &rsdt->table_offset_entry[i], 957 sizeof(uint32_t)); 958 } 959 build_header(linker, table_data, 960 (void *)rsdt, ACPI_RSDT_SIGNATURE, rsdt_len, 1); 961 } 962 963 static GArray * 964 build_rsdp(GArray *rsdp_table, GArray *linker, unsigned rsdt) 965 { 966 AcpiRsdpDescriptor *rsdp = acpi_data_push(rsdp_table, sizeof *rsdp); 967 968 bios_linker_loader_alloc(linker, ACPI_BUILD_RSDP_FILE, 1, 969 true /* fseg memory */); 970 971 rsdp->signature = cpu_to_le64(ACPI_RSDP_SIGNATURE); 972 memcpy(rsdp->oem_id, ACPI_BUILD_APPNAME6, 6); 973 rsdp->rsdt_physical_address = cpu_to_le32(rsdt); 974 /* Address to be filled by Guest linker */ 975 bios_linker_loader_add_pointer(linker, ACPI_BUILD_RSDP_FILE, 976 ACPI_BUILD_TABLE_FILE, 977 rsdp_table, &rsdp->rsdt_physical_address, 978 sizeof rsdp->rsdt_physical_address); 979 rsdp->checksum = 0; 980 /* Checksum to be filled by Guest linker */ 981 bios_linker_loader_add_checksum(linker, ACPI_BUILD_RSDP_FILE, 982 rsdp, rsdp, sizeof *rsdp, &rsdp->checksum); 983 984 return rsdp_table; 985 } 986 987 typedef 988 struct AcpiBuildTables { 989 GArray *table_data; 990 GArray *rsdp; 991 GArray *linker; 992 } AcpiBuildTables; 993 994 static inline void acpi_build_tables_init(AcpiBuildTables *tables) 995 { 996 tables->rsdp = g_array_new(false, true /* clear */, 1); 997 tables->table_data = g_array_new(false, true /* clear */, 1); 998 tables->linker = bios_linker_loader_init(); 999 } 1000 1001 static inline void acpi_build_tables_cleanup(AcpiBuildTables *tables, bool mfre) 1002 { 1003 void *linker_data = bios_linker_loader_cleanup(tables->linker); 1004 if (mfre) { 1005 g_free(linker_data); 1006 } 1007 g_array_free(tables->rsdp, mfre); 1008 g_array_free(tables->table_data, mfre); 1009 } 1010 1011 typedef 1012 struct AcpiBuildState { 1013 /* Copy of table in RAM (for patching). */ 1014 uint8_t *table_ram; 1015 uint32_t table_size; 1016 /* Is table patched? */ 1017 uint8_t patched; 1018 PcGuestInfo *guest_info; 1019 } AcpiBuildState; 1020 1021 static bool acpi_get_mcfg(AcpiMcfgInfo *mcfg) 1022 { 1023 Object *pci_host; 1024 QObject *o; 1025 bool ambiguous; 1026 1027 pci_host = object_resolve_path_type("", TYPE_PCI_HOST_BRIDGE, &ambiguous); 1028 g_assert(!ambiguous); 1029 g_assert(pci_host); 1030 1031 o = object_property_get_qobject(pci_host, PCIE_HOST_MCFG_BASE, NULL); 1032 if (!o) { 1033 return false; 1034 } 1035 mcfg->mcfg_base = qint_get_int(qobject_to_qint(o)); 1036 1037 o = object_property_get_qobject(pci_host, PCIE_HOST_MCFG_SIZE, NULL); 1038 assert(o); 1039 mcfg->mcfg_size = qint_get_int(qobject_to_qint(o)); 1040 return true; 1041 } 1042 1043 static 1044 void acpi_build(PcGuestInfo *guest_info, AcpiBuildTables *tables) 1045 { 1046 GArray *table_offsets; 1047 unsigned facs, dsdt, rsdt; 1048 AcpiCpuInfo cpu; 1049 AcpiPmInfo pm; 1050 AcpiMiscInfo misc; 1051 AcpiMcfgInfo mcfg; 1052 PcPciInfo pci; 1053 uint8_t *u; 1054 1055 acpi_get_cpu_info(&cpu); 1056 acpi_get_pm_info(&pm); 1057 acpi_get_dsdt(&misc); 1058 acpi_get_hotplug_info(&misc); 1059 acpi_get_misc_info(&misc); 1060 acpi_get_pci_info(&pci); 1061 1062 table_offsets = g_array_new(false, true /* clear */, 1063 sizeof(uint32_t)); 1064 ACPI_BUILD_DPRINTF(3, "init ACPI tables\n"); 1065 1066 bios_linker_loader_alloc(tables->linker, ACPI_BUILD_TABLE_FILE, 1067 64 /* Ensure FACS is aligned */, 1068 false /* high memory */); 1069 1070 /* 1071 * FACS is pointed to by FADT. 1072 * We place it first since it's the only table that has alignment 1073 * requirements. 1074 */ 1075 facs = tables->table_data->len; 1076 build_facs(tables->table_data, tables->linker, guest_info); 1077 1078 /* DSDT is pointed to by FADT */ 1079 dsdt = tables->table_data->len; 1080 build_dsdt(tables->table_data, tables->linker, &misc); 1081 1082 /* ACPI tables pointed to by RSDT */ 1083 acpi_add_table(table_offsets, tables->table_data); 1084 build_fadt(tables->table_data, tables->linker, &pm, facs, dsdt); 1085 acpi_add_table(table_offsets, tables->table_data); 1086 1087 build_ssdt(tables->table_data, tables->linker, &cpu, &pm, &misc, &pci, 1088 guest_info); 1089 acpi_add_table(table_offsets, tables->table_data); 1090 1091 build_madt(tables->table_data, tables->linker, &cpu, guest_info); 1092 acpi_add_table(table_offsets, tables->table_data); 1093 if (misc.has_hpet) { 1094 build_hpet(tables->table_data, tables->linker); 1095 } 1096 if (guest_info->numa_nodes) { 1097 acpi_add_table(table_offsets, tables->table_data); 1098 build_srat(tables->table_data, tables->linker, &cpu, guest_info); 1099 } 1100 if (acpi_get_mcfg(&mcfg)) { 1101 acpi_add_table(table_offsets, tables->table_data); 1102 build_mcfg_q35(tables->table_data, tables->linker, &mcfg); 1103 } 1104 1105 /* Add tables supplied by user (if any) */ 1106 for (u = acpi_table_first(); u; u = acpi_table_next(u)) { 1107 unsigned len = acpi_table_len(u); 1108 1109 acpi_add_table(table_offsets, tables->table_data); 1110 g_array_append_vals(tables->table_data, u, len); 1111 } 1112 1113 /* RSDT is pointed to by RSDP */ 1114 rsdt = tables->table_data->len; 1115 build_rsdt(tables->table_data, tables->linker, table_offsets); 1116 1117 /* RSDP is in FSEG memory, so allocate it separately */ 1118 build_rsdp(tables->rsdp, tables->linker, rsdt); 1119 1120 /* We'll expose it all to Guest so align size to reduce 1121 * chance of size changes. 1122 * RSDP is small so it's easy to keep it immutable, no need to 1123 * bother with alignment. 1124 */ 1125 acpi_align_size(tables->table_data, 0x1000); 1126 1127 acpi_align_size(tables->linker, 0x1000); 1128 1129 /* Cleanup memory that's no longer used. */ 1130 g_array_free(table_offsets, true); 1131 } 1132 1133 static void acpi_build_update(void *build_opaque, uint32_t offset) 1134 { 1135 AcpiBuildState *build_state = build_opaque; 1136 AcpiBuildTables tables; 1137 1138 /* No state to update or already patched? Nothing to do. */ 1139 if (!build_state || build_state->patched) { 1140 return; 1141 } 1142 build_state->patched = 1; 1143 1144 acpi_build_tables_init(&tables); 1145 1146 acpi_build(build_state->guest_info, &tables); 1147 1148 assert(acpi_data_len(tables.table_data) == build_state->table_size); 1149 memcpy(build_state->table_ram, tables.table_data->data, 1150 build_state->table_size); 1151 1152 acpi_build_tables_cleanup(&tables, true); 1153 } 1154 1155 static void acpi_build_reset(void *build_opaque) 1156 { 1157 AcpiBuildState *build_state = build_opaque; 1158 build_state->patched = 0; 1159 } 1160 1161 static void *acpi_add_rom_blob(AcpiBuildState *build_state, GArray *blob, 1162 const char *name) 1163 { 1164 return rom_add_blob(name, blob->data, acpi_data_len(blob), -1, name, 1165 acpi_build_update, build_state); 1166 } 1167 1168 static const VMStateDescription vmstate_acpi_build = { 1169 .name = "acpi_build", 1170 .version_id = 1, 1171 .minimum_version_id = 1, 1172 .minimum_version_id_old = 1, 1173 .fields = (VMStateField[]) { 1174 VMSTATE_UINT8(patched, AcpiBuildState), 1175 VMSTATE_END_OF_LIST() 1176 }, 1177 }; 1178 1179 void acpi_setup(PcGuestInfo *guest_info) 1180 { 1181 AcpiBuildTables tables; 1182 AcpiBuildState *build_state; 1183 1184 if (!guest_info->fw_cfg) { 1185 ACPI_BUILD_DPRINTF(3, "No fw cfg. Bailing out.\n"); 1186 return; 1187 } 1188 1189 if (!guest_info->has_acpi_build) { 1190 ACPI_BUILD_DPRINTF(3, "ACPI build disabled. Bailing out.\n"); 1191 return; 1192 } 1193 1194 if (!acpi_enabled) { 1195 ACPI_BUILD_DPRINTF(3, "ACPI disabled. Bailing out.\n"); 1196 return; 1197 } 1198 1199 build_state = g_malloc0(sizeof *build_state); 1200 1201 build_state->guest_info = guest_info; 1202 1203 acpi_build_tables_init(&tables); 1204 acpi_build(build_state->guest_info, &tables); 1205 1206 /* Now expose it all to Guest */ 1207 build_state->table_ram = acpi_add_rom_blob(build_state, tables.table_data, 1208 ACPI_BUILD_TABLE_FILE); 1209 build_state->table_size = acpi_data_len(tables.table_data); 1210 1211 acpi_add_rom_blob(NULL, tables.linker, "etc/table-loader"); 1212 1213 /* 1214 * RSDP is small so it's easy to keep it immutable, no need to 1215 * bother with ROM blobs. 1216 */ 1217 fw_cfg_add_file(guest_info->fw_cfg, ACPI_BUILD_RSDP_FILE, 1218 tables.rsdp->data, acpi_data_len(tables.rsdp)); 1219 1220 qemu_register_reset(acpi_build_reset, build_state); 1221 acpi_build_reset(build_state); 1222 vmstate_register(NULL, 0, &vmstate_acpi_build, build_state); 1223 1224 /* Cleanup tables but don't free the memory: we track it 1225 * in build_state. 1226 */ 1227 acpi_build_tables_cleanup(&tables, false); 1228 } 1229