1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Support for generating ACPI tables and passing them to Guests 4 * 5 * Copyright (C) 2021 Loongson Technology Corporation Limited 6 */ 7 8 #include "qemu/osdep.h" 9 #include "qapi/error.h" 10 #include "qemu/bitmap.h" 11 #include "hw/pci/pci.h" 12 #include "hw/core/cpu.h" 13 #include "target/loongarch/cpu.h" 14 #include "hw/acpi/acpi-defs.h" 15 #include "hw/acpi/acpi.h" 16 #include "hw/nvram/fw_cfg.h" 17 #include "hw/acpi/bios-linker-loader.h" 18 #include "migration/vmstate.h" 19 #include "hw/mem/memory-device.h" 20 #include "sysemu/reset.h" 21 22 /* Supported chipsets: */ 23 #include "hw/pci-host/ls7a.h" 24 #include "hw/loongarch/virt.h" 25 #include "hw/acpi/aml-build.h" 26 27 #include "hw/acpi/utils.h" 28 #include "hw/acpi/pci.h" 29 30 #include "qom/qom-qobject.h" 31 32 #include "hw/acpi/generic_event_device.h" 33 #include "hw/pci-host/gpex.h" 34 #include "sysemu/tpm.h" 35 #include "hw/platform-bus.h" 36 #include "hw/acpi/aml-build.h" 37 38 #define ACPI_BUILD_ALIGN_SIZE 0x1000 39 #define ACPI_BUILD_TABLE_SIZE 0x20000 40 41 #ifdef DEBUG_ACPI_BUILD 42 #define ACPI_BUILD_DPRINTF(fmt, ...) \ 43 do {printf("ACPI_BUILD: " fmt, ## __VA_ARGS__); } while (0) 44 #else 45 #define ACPI_BUILD_DPRINTF(fmt, ...) 46 #endif 47 48 /* build FADT */ 49 static void init_common_fadt_data(AcpiFadtData *data) 50 { 51 AcpiFadtData fadt = { 52 /* ACPI 5.0: 4.1 Hardware-Reduced ACPI */ 53 .rev = 5, 54 .flags = ((1 << ACPI_FADT_F_HW_REDUCED_ACPI) | 55 (1 << ACPI_FADT_F_RESET_REG_SUP)), 56 57 /* ACPI 5.0: 4.8.3.7 Sleep Control and Status Registers */ 58 .sleep_ctl = { 59 .space_id = AML_AS_SYSTEM_MEMORY, 60 .bit_width = 8, 61 .address = VIRT_GED_REG_ADDR + ACPI_GED_REG_SLEEP_CTL, 62 }, 63 .sleep_sts = { 64 .space_id = AML_AS_SYSTEM_MEMORY, 65 .bit_width = 8, 66 .address = VIRT_GED_REG_ADDR + ACPI_GED_REG_SLEEP_STS, 67 }, 68 69 /* ACPI 5.0: 4.8.3.6 Reset Register */ 70 .reset_reg = { 71 .space_id = AML_AS_SYSTEM_MEMORY, 72 .bit_width = 8, 73 .address = VIRT_GED_REG_ADDR + ACPI_GED_REG_RESET, 74 }, 75 .reset_val = ACPI_GED_RESET_VALUE, 76 }; 77 *data = fadt; 78 } 79 80 static void acpi_align_size(GArray *blob, unsigned align) 81 { 82 /* 83 * Align size to multiple of given size. This reduces the chance 84 * we need to change size in the future (breaking cross version migration). 85 */ 86 g_array_set_size(blob, ROUND_UP(acpi_data_len(blob), align)); 87 } 88 89 /* build FACS */ 90 static void 91 build_facs(GArray *table_data) 92 { 93 const char *sig = "FACS"; 94 const uint8_t reserved[40] = {}; 95 96 g_array_append_vals(table_data, sig, 4); /* Signature */ 97 build_append_int_noprefix(table_data, 64, 4); /* Length */ 98 build_append_int_noprefix(table_data, 0, 4); /* Hardware Signature */ 99 build_append_int_noprefix(table_data, 0, 4); /* Firmware Waking Vector */ 100 build_append_int_noprefix(table_data, 0, 4); /* Global Lock */ 101 build_append_int_noprefix(table_data, 0, 4); /* Flags */ 102 g_array_append_vals(table_data, reserved, 40); /* Reserved */ 103 } 104 105 /* build MADT */ 106 static void 107 build_madt(GArray *table_data, BIOSLinker *linker, LoongArchMachineState *lams) 108 { 109 MachineState *ms = MACHINE(lams); 110 int i; 111 AcpiTable table = { .sig = "APIC", .rev = 1, .oem_id = lams->oem_id, 112 .oem_table_id = lams->oem_table_id }; 113 114 acpi_table_begin(&table, table_data); 115 116 /* Local APIC Address */ 117 build_append_int_noprefix(table_data, 0, 4); 118 build_append_int_noprefix(table_data, 1 /* PCAT_COMPAT */, 4); /* Flags */ 119 120 for (i = 0; i < ms->smp.cpus; i++) { 121 /* Processor Core Interrupt Controller Structure */ 122 build_append_int_noprefix(table_data, 17, 1); /* Type */ 123 build_append_int_noprefix(table_data, 15, 1); /* Length */ 124 build_append_int_noprefix(table_data, 1, 1); /* Version */ 125 build_append_int_noprefix(table_data, i + 1, 4); /* ACPI Processor ID */ 126 build_append_int_noprefix(table_data, i, 4); /* Core ID */ 127 build_append_int_noprefix(table_data, 1, 4); /* Flags */ 128 } 129 130 /* Extend I/O Interrupt Controller Structure */ 131 build_append_int_noprefix(table_data, 20, 1); /* Type */ 132 build_append_int_noprefix(table_data, 13, 1); /* Length */ 133 build_append_int_noprefix(table_data, 1, 1); /* Version */ 134 build_append_int_noprefix(table_data, 3, 1); /* Cascade */ 135 build_append_int_noprefix(table_data, 0, 1); /* Node */ 136 build_append_int_noprefix(table_data, 0xffff, 8); /* Node map */ 137 138 /* MSI Interrupt Controller Structure */ 139 build_append_int_noprefix(table_data, 21, 1); /* Type */ 140 build_append_int_noprefix(table_data, 19, 1); /* Length */ 141 build_append_int_noprefix(table_data, 1, 1); /* Version */ 142 build_append_int_noprefix(table_data, VIRT_PCH_MSI_ADDR_LOW, 8);/* Address */ 143 build_append_int_noprefix(table_data, 0x40, 4); /* Start */ 144 build_append_int_noprefix(table_data, 0xc0, 4); /* Count */ 145 146 /* Bridge I/O Interrupt Controller Structure */ 147 build_append_int_noprefix(table_data, 22, 1); /* Type */ 148 build_append_int_noprefix(table_data, 17, 1); /* Length */ 149 build_append_int_noprefix(table_data, 1, 1); /* Version */ 150 build_append_int_noprefix(table_data, VIRT_PCH_REG_BASE, 8);/* Address */ 151 build_append_int_noprefix(table_data, 0x1000, 2); /* Size */ 152 build_append_int_noprefix(table_data, 0, 2); /* Id */ 153 build_append_int_noprefix(table_data, 0x40, 2); /* Base */ 154 155 acpi_table_end(linker, &table); 156 } 157 158 /* build SRAT */ 159 static void 160 build_srat(GArray *table_data, BIOSLinker *linker, MachineState *machine) 161 { 162 uint64_t i; 163 LoongArchMachineState *lams = LOONGARCH_MACHINE(machine); 164 MachineState *ms = MACHINE(lams); 165 AcpiTable table = { .sig = "SRAT", .rev = 1, .oem_id = lams->oem_id, 166 .oem_table_id = lams->oem_table_id }; 167 168 acpi_table_begin(&table, table_data); 169 build_append_int_noprefix(table_data, 1, 4); /* Reserved */ 170 build_append_int_noprefix(table_data, 0, 8); /* Reserved */ 171 172 for (i = 0; i < ms->smp.cpus; ++i) { 173 /* Processor Local APIC/SAPIC Affinity Structure */ 174 build_append_int_noprefix(table_data, 0, 1); /* Type */ 175 build_append_int_noprefix(table_data, 16, 1); /* Length */ 176 /* Proximity Domain [7:0] */ 177 build_append_int_noprefix(table_data, 0, 1); 178 build_append_int_noprefix(table_data, i, 1); /* APIC ID */ 179 /* Flags, Table 5-36 */ 180 build_append_int_noprefix(table_data, 1, 4); 181 build_append_int_noprefix(table_data, 0, 1); /* Local SAPIC EID */ 182 /* Proximity Domain [31:8] */ 183 build_append_int_noprefix(table_data, 0, 3); 184 build_append_int_noprefix(table_data, 0, 4); /* Reserved */ 185 } 186 187 build_srat_memory(table_data, VIRT_LOWMEM_BASE, VIRT_LOWMEM_SIZE, 188 0, MEM_AFFINITY_ENABLED); 189 190 build_srat_memory(table_data, VIRT_HIGHMEM_BASE, machine->ram_size - VIRT_LOWMEM_SIZE, 191 0, MEM_AFFINITY_ENABLED); 192 193 if (ms->device_memory) { 194 build_srat_memory(table_data, ms->device_memory->base, 195 memory_region_size(&ms->device_memory->mr), 196 0, MEM_AFFINITY_HOTPLUGGABLE | MEM_AFFINITY_ENABLED); 197 } 198 199 acpi_table_end(linker, &table); 200 } 201 202 typedef 203 struct AcpiBuildState { 204 /* Copy of table in RAM (for patching). */ 205 MemoryRegion *table_mr; 206 /* Is table patched? */ 207 uint8_t patched; 208 void *rsdp; 209 MemoryRegion *rsdp_mr; 210 MemoryRegion *linker_mr; 211 } AcpiBuildState; 212 213 static void build_uart_device_aml(Aml *table) 214 { 215 Aml *dev; 216 Aml *crs; 217 Aml *pkg0, *pkg1, *pkg2; 218 uint32_t uart_irq = VIRT_UART_IRQ; 219 220 Aml *scope = aml_scope("_SB"); 221 dev = aml_device("COMA"); 222 aml_append(dev, aml_name_decl("_HID", aml_string("PNP0501"))); 223 aml_append(dev, aml_name_decl("_UID", aml_int(0))); 224 aml_append(dev, aml_name_decl("_CCA", aml_int(1))); 225 crs = aml_resource_template(); 226 aml_append(crs, 227 aml_qword_memory(AML_POS_DECODE, AML_MIN_FIXED, AML_MAX_FIXED, 228 AML_NON_CACHEABLE, AML_READ_WRITE, 229 0, 0x1FE001E0, 0x1FE001E7, 0, 0x8)); 230 aml_append(crs, aml_interrupt(AML_CONSUMER, AML_LEVEL, AML_ACTIVE_HIGH, 231 AML_SHARED, &uart_irq, 1)); 232 aml_append(dev, aml_name_decl("_CRS", crs)); 233 pkg0 = aml_package(0x2); 234 aml_append(pkg0, aml_int(0x05F5E100)); 235 aml_append(pkg0, aml_string("clock-frenquency")); 236 pkg1 = aml_package(0x1); 237 aml_append(pkg1, pkg0); 238 pkg2 = aml_package(0x2); 239 aml_append(pkg2, aml_touuid("DAFFD814-6EBA-4D8C-8A91-BC9BBF4AA301")); 240 aml_append(pkg2, pkg1); 241 aml_append(dev, aml_name_decl("_DSD", pkg2)); 242 aml_append(scope, dev); 243 aml_append(table, scope); 244 } 245 246 static void 247 build_la_ged_aml(Aml *dsdt, MachineState *machine) 248 { 249 uint32_t event; 250 LoongArchMachineState *lams = LOONGARCH_MACHINE(machine); 251 252 build_ged_aml(dsdt, "\\_SB."GED_DEVICE, 253 HOTPLUG_HANDLER(lams->acpi_ged), 254 VIRT_SCI_IRQ, AML_SYSTEM_MEMORY, 255 VIRT_GED_EVT_ADDR); 256 event = object_property_get_uint(OBJECT(lams->acpi_ged), 257 "ged-event", &error_abort); 258 if (event & ACPI_GED_MEM_HOTPLUG_EVT) { 259 build_memory_hotplug_aml(dsdt, machine->ram_slots, "\\_SB", NULL, 260 AML_SYSTEM_MEMORY, 261 VIRT_GED_MEM_ADDR); 262 } 263 } 264 265 static void build_pci_device_aml(Aml *scope, LoongArchMachineState *lams) 266 { 267 struct GPEXConfig cfg = { 268 .mmio64.base = VIRT_PCI_MEM_BASE, 269 .mmio64.size = VIRT_PCI_MEM_SIZE, 270 .pio.base = VIRT_PCI_IO_BASE, 271 .pio.size = VIRT_PCI_IO_SIZE, 272 .ecam.base = VIRT_PCI_CFG_BASE, 273 .ecam.size = VIRT_PCI_CFG_SIZE, 274 .irq = PCH_PIC_IRQ_OFFSET + VIRT_DEVICE_IRQS, 275 .bus = lams->pci_bus, 276 }; 277 278 acpi_dsdt_add_gpex(scope, &cfg); 279 } 280 281 #ifdef CONFIG_TPM 282 static void acpi_dsdt_add_tpm(Aml *scope, LoongArchMachineState *vms) 283 { 284 PlatformBusDevice *pbus = PLATFORM_BUS_DEVICE(vms->platform_bus_dev); 285 hwaddr pbus_base = VIRT_PLATFORM_BUS_BASEADDRESS; 286 SysBusDevice *sbdev = SYS_BUS_DEVICE(tpm_find()); 287 MemoryRegion *sbdev_mr; 288 hwaddr tpm_base; 289 290 if (!sbdev) { 291 return; 292 } 293 294 tpm_base = platform_bus_get_mmio_addr(pbus, sbdev, 0); 295 assert(tpm_base != -1); 296 297 tpm_base += pbus_base; 298 299 sbdev_mr = sysbus_mmio_get_region(sbdev, 0); 300 301 Aml *dev = aml_device("TPM0"); 302 aml_append(dev, aml_name_decl("_HID", aml_string("MSFT0101"))); 303 aml_append(dev, aml_name_decl("_STR", aml_string("TPM 2.0 Device"))); 304 aml_append(dev, aml_name_decl("_UID", aml_int(0))); 305 306 Aml *crs = aml_resource_template(); 307 aml_append(crs, 308 aml_memory32_fixed(tpm_base, 309 (uint32_t)memory_region_size(sbdev_mr), 310 AML_READ_WRITE)); 311 aml_append(dev, aml_name_decl("_CRS", crs)); 312 aml_append(scope, dev); 313 } 314 #endif 315 316 /* build DSDT */ 317 static void 318 build_dsdt(GArray *table_data, BIOSLinker *linker, MachineState *machine) 319 { 320 Aml *dsdt, *scope, *pkg; 321 LoongArchMachineState *lams = LOONGARCH_MACHINE(machine); 322 AcpiTable table = { .sig = "DSDT", .rev = 1, .oem_id = lams->oem_id, 323 .oem_table_id = lams->oem_table_id }; 324 325 acpi_table_begin(&table, table_data); 326 dsdt = init_aml_allocator(); 327 build_uart_device_aml(dsdt); 328 build_pci_device_aml(dsdt, lams); 329 build_la_ged_aml(dsdt, machine); 330 #ifdef CONFIG_TPM 331 acpi_dsdt_add_tpm(dsdt, lams); 332 #endif 333 /* System State Package */ 334 scope = aml_scope("\\"); 335 pkg = aml_package(4); 336 aml_append(pkg, aml_int(ACPI_GED_SLP_TYP_S5)); 337 aml_append(pkg, aml_int(0)); /* ignored */ 338 aml_append(pkg, aml_int(0)); /* reserved */ 339 aml_append(pkg, aml_int(0)); /* reserved */ 340 aml_append(scope, aml_name_decl("_S5", pkg)); 341 aml_append(dsdt, scope); 342 /* Copy AML table into ACPI tables blob and patch header there */ 343 g_array_append_vals(table_data, dsdt->buf->data, dsdt->buf->len); 344 acpi_table_end(linker, &table); 345 free_aml_allocator(); 346 } 347 348 static void acpi_build(AcpiBuildTables *tables, MachineState *machine) 349 { 350 LoongArchMachineState *lams = LOONGARCH_MACHINE(machine); 351 GArray *table_offsets; 352 AcpiFadtData fadt_data; 353 unsigned facs, rsdt, dsdt; 354 uint8_t *u; 355 GArray *tables_blob = tables->table_data; 356 357 init_common_fadt_data(&fadt_data); 358 359 table_offsets = g_array_new(false, true, sizeof(uint32_t)); 360 ACPI_BUILD_DPRINTF("init ACPI tables\n"); 361 362 bios_linker_loader_alloc(tables->linker, 363 ACPI_BUILD_TABLE_FILE, tables_blob, 364 64, false); 365 366 /* 367 * FACS is pointed to by FADT. 368 * We place it first since it's the only table that has alignment 369 * requirements. 370 */ 371 facs = tables_blob->len; 372 build_facs(tables_blob); 373 374 /* DSDT is pointed to by FADT */ 375 dsdt = tables_blob->len; 376 build_dsdt(tables_blob, tables->linker, machine); 377 378 /* ACPI tables pointed to by RSDT */ 379 acpi_add_table(table_offsets, tables_blob); 380 fadt_data.facs_tbl_offset = &facs; 381 fadt_data.dsdt_tbl_offset = &dsdt; 382 fadt_data.xdsdt_tbl_offset = &dsdt; 383 build_fadt(tables_blob, tables->linker, &fadt_data, 384 lams->oem_id, lams->oem_table_id); 385 386 acpi_add_table(table_offsets, tables_blob); 387 build_madt(tables_blob, tables->linker, lams); 388 389 acpi_add_table(table_offsets, tables_blob); 390 build_srat(tables_blob, tables->linker, machine); 391 392 acpi_add_table(table_offsets, tables_blob); 393 { 394 AcpiMcfgInfo mcfg = { 395 .base = cpu_to_le64(VIRT_PCI_CFG_BASE), 396 .size = cpu_to_le64(VIRT_PCI_CFG_SIZE), 397 }; 398 build_mcfg(tables_blob, tables->linker, &mcfg, lams->oem_id, 399 lams->oem_table_id); 400 } 401 402 #ifdef CONFIG_TPM 403 /* TPM info */ 404 if (tpm_get_version(tpm_find()) == TPM_VERSION_2_0) { 405 acpi_add_table(table_offsets, tables_blob); 406 build_tpm2(tables_blob, tables->linker, 407 tables->tcpalog, lams->oem_id, 408 lams->oem_table_id); 409 } 410 #endif 411 /* Add tables supplied by user (if any) */ 412 for (u = acpi_table_first(); u; u = acpi_table_next(u)) { 413 unsigned len = acpi_table_len(u); 414 415 acpi_add_table(table_offsets, tables_blob); 416 g_array_append_vals(tables_blob, u, len); 417 } 418 419 /* RSDT is pointed to by RSDP */ 420 rsdt = tables_blob->len; 421 build_rsdt(tables_blob, tables->linker, table_offsets, 422 lams->oem_id, lams->oem_table_id); 423 424 /* RSDP is in FSEG memory, so allocate it separately */ 425 { 426 AcpiRsdpData rsdp_data = { 427 .revision = 0, 428 .oem_id = lams->oem_id, 429 .xsdt_tbl_offset = NULL, 430 .rsdt_tbl_offset = &rsdt, 431 }; 432 build_rsdp(tables->rsdp, tables->linker, &rsdp_data); 433 } 434 435 /* 436 * The align size is 128, warn if 64k is not enough therefore 437 * the align size could be resized. 438 */ 439 if (tables_blob->len > ACPI_BUILD_TABLE_SIZE / 2) { 440 warn_report("ACPI table size %u exceeds %d bytes," 441 " migration may not work", 442 tables_blob->len, ACPI_BUILD_TABLE_SIZE / 2); 443 error_printf("Try removing CPUs, NUMA nodes, memory slots" 444 " or PCI bridges."); 445 } 446 447 acpi_align_size(tables->linker->cmd_blob, ACPI_BUILD_ALIGN_SIZE); 448 449 /* Cleanup memory that's no longer used. */ 450 g_array_free(table_offsets, true); 451 } 452 453 static void acpi_ram_update(MemoryRegion *mr, GArray *data) 454 { 455 uint32_t size = acpi_data_len(data); 456 457 /* 458 * Make sure RAM size is correct - in case it got changed 459 * e.g. by migration 460 */ 461 memory_region_ram_resize(mr, size, &error_abort); 462 463 memcpy(memory_region_get_ram_ptr(mr), data->data, size); 464 memory_region_set_dirty(mr, 0, size); 465 } 466 467 static void acpi_build_update(void *build_opaque) 468 { 469 AcpiBuildState *build_state = build_opaque; 470 AcpiBuildTables tables; 471 472 /* No state to update or already patched? Nothing to do. */ 473 if (!build_state || build_state->patched) { 474 return; 475 } 476 build_state->patched = 1; 477 478 acpi_build_tables_init(&tables); 479 480 acpi_build(&tables, MACHINE(qdev_get_machine())); 481 482 acpi_ram_update(build_state->table_mr, tables.table_data); 483 acpi_ram_update(build_state->rsdp_mr, tables.rsdp); 484 acpi_ram_update(build_state->linker_mr, tables.linker->cmd_blob); 485 486 acpi_build_tables_cleanup(&tables, true); 487 } 488 489 static void acpi_build_reset(void *build_opaque) 490 { 491 AcpiBuildState *build_state = build_opaque; 492 build_state->patched = 0; 493 } 494 495 static const VMStateDescription vmstate_acpi_build = { 496 .name = "acpi_build", 497 .version_id = 1, 498 .minimum_version_id = 1, 499 .fields = (VMStateField[]) { 500 VMSTATE_UINT8(patched, AcpiBuildState), 501 VMSTATE_END_OF_LIST() 502 }, 503 }; 504 505 void loongarch_acpi_setup(LoongArchMachineState *lams) 506 { 507 AcpiBuildTables tables; 508 AcpiBuildState *build_state; 509 510 if (!lams->fw_cfg) { 511 ACPI_BUILD_DPRINTF("No fw cfg. Bailing out.\n"); 512 return; 513 } 514 515 if (!loongarch_is_acpi_enabled(lams)) { 516 ACPI_BUILD_DPRINTF("ACPI disabled. Bailing out.\n"); 517 return; 518 } 519 520 build_state = g_malloc0(sizeof *build_state); 521 522 acpi_build_tables_init(&tables); 523 acpi_build(&tables, MACHINE(lams)); 524 525 /* Now expose it all to Guest */ 526 build_state->table_mr = acpi_add_rom_blob(acpi_build_update, 527 build_state, tables.table_data, 528 ACPI_BUILD_TABLE_FILE); 529 assert(build_state->table_mr != NULL); 530 531 build_state->linker_mr = 532 acpi_add_rom_blob(acpi_build_update, build_state, 533 tables.linker->cmd_blob, ACPI_BUILD_LOADER_FILE); 534 535 build_state->rsdp_mr = acpi_add_rom_blob(acpi_build_update, 536 build_state, tables.rsdp, 537 ACPI_BUILD_RSDP_FILE); 538 539 qemu_register_reset(acpi_build_reset, build_state); 540 acpi_build_reset(build_state); 541 vmstate_register(NULL, 0, &vmstate_acpi_build, build_state); 542 543 /* 544 * Cleanup tables but don't free the memory: we track it 545 * in build_state. 546 */ 547 acpi_build_tables_cleanup(&tables, false); 548 } 549