1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _LINUX_EFI_H 3 #define _LINUX_EFI_H 4 5 /* 6 * Extensible Firmware Interface 7 * Based on 'Extensible Firmware Interface Specification' version 0.9, April 30, 1999 8 * 9 * Copyright (C) 1999 VA Linux Systems 10 * Copyright (C) 1999 Walt Drummond <drummond@valinux.com> 11 * Copyright (C) 1999, 2002-2003 Hewlett-Packard Co. 12 * David Mosberger-Tang <davidm@hpl.hp.com> 13 * Stephane Eranian <eranian@hpl.hp.com> 14 */ 15 #include <linux/init.h> 16 #include <linux/string.h> 17 #include <linux/time.h> 18 #include <linux/types.h> 19 #include <linux/proc_fs.h> 20 #include <linux/rtc.h> 21 #include <linux/ioport.h> 22 #include <linux/pfn.h> 23 #include <linux/pstore.h> 24 #include <linux/range.h> 25 #include <linux/reboot.h> 26 #include <linux/uuid.h> 27 #include <linux/screen_info.h> 28 29 #include <asm/page.h> 30 31 #define EFI_SUCCESS 0 32 #define EFI_LOAD_ERROR ( 1 | (1UL << (BITS_PER_LONG-1))) 33 #define EFI_INVALID_PARAMETER ( 2 | (1UL << (BITS_PER_LONG-1))) 34 #define EFI_UNSUPPORTED ( 3 | (1UL << (BITS_PER_LONG-1))) 35 #define EFI_BAD_BUFFER_SIZE ( 4 | (1UL << (BITS_PER_LONG-1))) 36 #define EFI_BUFFER_TOO_SMALL ( 5 | (1UL << (BITS_PER_LONG-1))) 37 #define EFI_NOT_READY ( 6 | (1UL << (BITS_PER_LONG-1))) 38 #define EFI_DEVICE_ERROR ( 7 | (1UL << (BITS_PER_LONG-1))) 39 #define EFI_WRITE_PROTECTED ( 8 | (1UL << (BITS_PER_LONG-1))) 40 #define EFI_OUT_OF_RESOURCES ( 9 | (1UL << (BITS_PER_LONG-1))) 41 #define EFI_NOT_FOUND (14 | (1UL << (BITS_PER_LONG-1))) 42 #define EFI_ABORTED (21 | (1UL << (BITS_PER_LONG-1))) 43 #define EFI_SECURITY_VIOLATION (26 | (1UL << (BITS_PER_LONG-1))) 44 45 typedef unsigned long efi_status_t; 46 typedef u8 efi_bool_t; 47 typedef u16 efi_char16_t; /* UNICODE character */ 48 typedef u64 efi_physical_addr_t; 49 typedef void *efi_handle_t; 50 51 /* 52 * The UEFI spec and EDK2 reference implementation both define EFI_GUID as 53 * struct { u32 a; u16; b; u16 c; u8 d[8]; }; and so the implied alignment 54 * is 32 bits not 8 bits like our guid_t. In some cases (i.e., on 32-bit ARM), 55 * this means that firmware services invoked by the kernel may assume that 56 * efi_guid_t* arguments are 32-bit aligned, and use memory accessors that 57 * do not tolerate misalignment. So let's set the minimum alignment to 32 bits. 58 * 59 * Note that the UEFI spec as well as some comments in the EDK2 code base 60 * suggest that EFI_GUID should be 64-bit aligned, but this appears to be 61 * a mistake, given that no code seems to exist that actually enforces that 62 * or relies on it. 63 */ 64 typedef guid_t efi_guid_t __aligned(__alignof__(u32)); 65 66 #define EFI_GUID(a,b,c,d0,d1,d2,d3,d4,d5,d6,d7) \ 67 GUID_INIT(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7) 68 69 /* 70 * Generic EFI table header 71 */ 72 typedef struct { 73 u64 signature; 74 u32 revision; 75 u32 headersize; 76 u32 crc32; 77 u32 reserved; 78 } efi_table_hdr_t; 79 80 /* 81 * Memory map descriptor: 82 */ 83 84 /* Memory types: */ 85 #define EFI_RESERVED_TYPE 0 86 #define EFI_LOADER_CODE 1 87 #define EFI_LOADER_DATA 2 88 #define EFI_BOOT_SERVICES_CODE 3 89 #define EFI_BOOT_SERVICES_DATA 4 90 #define EFI_RUNTIME_SERVICES_CODE 5 91 #define EFI_RUNTIME_SERVICES_DATA 6 92 #define EFI_CONVENTIONAL_MEMORY 7 93 #define EFI_UNUSABLE_MEMORY 8 94 #define EFI_ACPI_RECLAIM_MEMORY 9 95 #define EFI_ACPI_MEMORY_NVS 10 96 #define EFI_MEMORY_MAPPED_IO 11 97 #define EFI_MEMORY_MAPPED_IO_PORT_SPACE 12 98 #define EFI_PAL_CODE 13 99 #define EFI_PERSISTENT_MEMORY 14 100 #define EFI_MAX_MEMORY_TYPE 15 101 102 /* Attribute values: */ 103 #define EFI_MEMORY_UC ((u64)0x0000000000000001ULL) /* uncached */ 104 #define EFI_MEMORY_WC ((u64)0x0000000000000002ULL) /* write-coalescing */ 105 #define EFI_MEMORY_WT ((u64)0x0000000000000004ULL) /* write-through */ 106 #define EFI_MEMORY_WB ((u64)0x0000000000000008ULL) /* write-back */ 107 #define EFI_MEMORY_UCE ((u64)0x0000000000000010ULL) /* uncached, exported */ 108 #define EFI_MEMORY_WP ((u64)0x0000000000001000ULL) /* write-protect */ 109 #define EFI_MEMORY_RP ((u64)0x0000000000002000ULL) /* read-protect */ 110 #define EFI_MEMORY_XP ((u64)0x0000000000004000ULL) /* execute-protect */ 111 #define EFI_MEMORY_NV ((u64)0x0000000000008000ULL) /* non-volatile */ 112 #define EFI_MEMORY_MORE_RELIABLE \ 113 ((u64)0x0000000000010000ULL) /* higher reliability */ 114 #define EFI_MEMORY_RO ((u64)0x0000000000020000ULL) /* read-only */ 115 #define EFI_MEMORY_RUNTIME ((u64)0x8000000000000000ULL) /* range requires runtime mapping */ 116 #define EFI_MEMORY_DESCRIPTOR_VERSION 1 117 118 #define EFI_PAGE_SHIFT 12 119 #define EFI_PAGE_SIZE (1UL << EFI_PAGE_SHIFT) 120 #define EFI_PAGES_MAX (U64_MAX >> EFI_PAGE_SHIFT) 121 122 typedef struct { 123 u32 type; 124 u32 pad; 125 u64 phys_addr; 126 u64 virt_addr; 127 u64 num_pages; 128 u64 attribute; 129 } efi_memory_desc_t; 130 131 typedef struct { 132 efi_guid_t guid; 133 u32 headersize; 134 u32 flags; 135 u32 imagesize; 136 } efi_capsule_header_t; 137 138 struct efi_boot_memmap { 139 efi_memory_desc_t **map; 140 unsigned long *map_size; 141 unsigned long *desc_size; 142 u32 *desc_ver; 143 unsigned long *key_ptr; 144 unsigned long *buff_size; 145 }; 146 147 /* 148 * EFI capsule flags 149 */ 150 #define EFI_CAPSULE_PERSIST_ACROSS_RESET 0x00010000 151 #define EFI_CAPSULE_POPULATE_SYSTEM_TABLE 0x00020000 152 #define EFI_CAPSULE_INITIATE_RESET 0x00040000 153 154 struct capsule_info { 155 efi_capsule_header_t header; 156 efi_capsule_header_t *capsule; 157 int reset_type; 158 long index; 159 size_t count; 160 size_t total_size; 161 struct page **pages; 162 phys_addr_t *phys; 163 size_t page_bytes_remain; 164 }; 165 166 int __efi_capsule_setup_info(struct capsule_info *cap_info); 167 168 /* 169 * Allocation types for calls to boottime->allocate_pages. 170 */ 171 #define EFI_ALLOCATE_ANY_PAGES 0 172 #define EFI_ALLOCATE_MAX_ADDRESS 1 173 #define EFI_ALLOCATE_ADDRESS 2 174 #define EFI_MAX_ALLOCATE_TYPE 3 175 176 typedef int (*efi_freemem_callback_t) (u64 start, u64 end, void *arg); 177 178 /* 179 * Types and defines for Time Services 180 */ 181 #define EFI_TIME_ADJUST_DAYLIGHT 0x1 182 #define EFI_TIME_IN_DAYLIGHT 0x2 183 #define EFI_UNSPECIFIED_TIMEZONE 0x07ff 184 185 typedef struct { 186 u16 year; 187 u8 month; 188 u8 day; 189 u8 hour; 190 u8 minute; 191 u8 second; 192 u8 pad1; 193 u32 nanosecond; 194 s16 timezone; 195 u8 daylight; 196 u8 pad2; 197 } efi_time_t; 198 199 typedef struct { 200 u32 resolution; 201 u32 accuracy; 202 u8 sets_to_zero; 203 } efi_time_cap_t; 204 205 typedef struct { 206 efi_table_hdr_t hdr; 207 u32 raise_tpl; 208 u32 restore_tpl; 209 u32 allocate_pages; 210 u32 free_pages; 211 u32 get_memory_map; 212 u32 allocate_pool; 213 u32 free_pool; 214 u32 create_event; 215 u32 set_timer; 216 u32 wait_for_event; 217 u32 signal_event; 218 u32 close_event; 219 u32 check_event; 220 u32 install_protocol_interface; 221 u32 reinstall_protocol_interface; 222 u32 uninstall_protocol_interface; 223 u32 handle_protocol; 224 u32 __reserved; 225 u32 register_protocol_notify; 226 u32 locate_handle; 227 u32 locate_device_path; 228 u32 install_configuration_table; 229 u32 load_image; 230 u32 start_image; 231 u32 exit; 232 u32 unload_image; 233 u32 exit_boot_services; 234 u32 get_next_monotonic_count; 235 u32 stall; 236 u32 set_watchdog_timer; 237 u32 connect_controller; 238 u32 disconnect_controller; 239 u32 open_protocol; 240 u32 close_protocol; 241 u32 open_protocol_information; 242 u32 protocols_per_handle; 243 u32 locate_handle_buffer; 244 u32 locate_protocol; 245 u32 install_multiple_protocol_interfaces; 246 u32 uninstall_multiple_protocol_interfaces; 247 u32 calculate_crc32; 248 u32 copy_mem; 249 u32 set_mem; 250 u32 create_event_ex; 251 } __packed efi_boot_services_32_t; 252 253 typedef struct { 254 efi_table_hdr_t hdr; 255 u64 raise_tpl; 256 u64 restore_tpl; 257 u64 allocate_pages; 258 u64 free_pages; 259 u64 get_memory_map; 260 u64 allocate_pool; 261 u64 free_pool; 262 u64 create_event; 263 u64 set_timer; 264 u64 wait_for_event; 265 u64 signal_event; 266 u64 close_event; 267 u64 check_event; 268 u64 install_protocol_interface; 269 u64 reinstall_protocol_interface; 270 u64 uninstall_protocol_interface; 271 u64 handle_protocol; 272 u64 __reserved; 273 u64 register_protocol_notify; 274 u64 locate_handle; 275 u64 locate_device_path; 276 u64 install_configuration_table; 277 u64 load_image; 278 u64 start_image; 279 u64 exit; 280 u64 unload_image; 281 u64 exit_boot_services; 282 u64 get_next_monotonic_count; 283 u64 stall; 284 u64 set_watchdog_timer; 285 u64 connect_controller; 286 u64 disconnect_controller; 287 u64 open_protocol; 288 u64 close_protocol; 289 u64 open_protocol_information; 290 u64 protocols_per_handle; 291 u64 locate_handle_buffer; 292 u64 locate_protocol; 293 u64 install_multiple_protocol_interfaces; 294 u64 uninstall_multiple_protocol_interfaces; 295 u64 calculate_crc32; 296 u64 copy_mem; 297 u64 set_mem; 298 u64 create_event_ex; 299 } __packed efi_boot_services_64_t; 300 301 /* 302 * EFI Boot Services table 303 */ 304 typedef struct { 305 efi_table_hdr_t hdr; 306 void *raise_tpl; 307 void *restore_tpl; 308 efi_status_t (*allocate_pages)(int, int, unsigned long, 309 efi_physical_addr_t *); 310 efi_status_t (*free_pages)(efi_physical_addr_t, unsigned long); 311 efi_status_t (*get_memory_map)(unsigned long *, void *, unsigned long *, 312 unsigned long *, u32 *); 313 efi_status_t (*allocate_pool)(int, unsigned long, void **); 314 efi_status_t (*free_pool)(void *); 315 void *create_event; 316 void *set_timer; 317 void *wait_for_event; 318 void *signal_event; 319 void *close_event; 320 void *check_event; 321 void *install_protocol_interface; 322 void *reinstall_protocol_interface; 323 void *uninstall_protocol_interface; 324 efi_status_t (*handle_protocol)(efi_handle_t, efi_guid_t *, void **); 325 void *__reserved; 326 void *register_protocol_notify; 327 efi_status_t (*locate_handle)(int, efi_guid_t *, void *, 328 unsigned long *, efi_handle_t *); 329 void *locate_device_path; 330 efi_status_t (*install_configuration_table)(efi_guid_t *, void *); 331 void *load_image; 332 void *start_image; 333 void *exit; 334 void *unload_image; 335 efi_status_t (*exit_boot_services)(efi_handle_t, unsigned long); 336 void *get_next_monotonic_count; 337 void *stall; 338 void *set_watchdog_timer; 339 void *connect_controller; 340 void *disconnect_controller; 341 void *open_protocol; 342 void *close_protocol; 343 void *open_protocol_information; 344 void *protocols_per_handle; 345 void *locate_handle_buffer; 346 efi_status_t (*locate_protocol)(efi_guid_t *, void *, void **); 347 void *install_multiple_protocol_interfaces; 348 void *uninstall_multiple_protocol_interfaces; 349 void *calculate_crc32; 350 void *copy_mem; 351 void *set_mem; 352 void *create_event_ex; 353 } efi_boot_services_t; 354 355 typedef enum { 356 EfiPciIoWidthUint8, 357 EfiPciIoWidthUint16, 358 EfiPciIoWidthUint32, 359 EfiPciIoWidthUint64, 360 EfiPciIoWidthFifoUint8, 361 EfiPciIoWidthFifoUint16, 362 EfiPciIoWidthFifoUint32, 363 EfiPciIoWidthFifoUint64, 364 EfiPciIoWidthFillUint8, 365 EfiPciIoWidthFillUint16, 366 EfiPciIoWidthFillUint32, 367 EfiPciIoWidthFillUint64, 368 EfiPciIoWidthMaximum 369 } EFI_PCI_IO_PROTOCOL_WIDTH; 370 371 typedef enum { 372 EfiPciIoAttributeOperationGet, 373 EfiPciIoAttributeOperationSet, 374 EfiPciIoAttributeOperationEnable, 375 EfiPciIoAttributeOperationDisable, 376 EfiPciIoAttributeOperationSupported, 377 EfiPciIoAttributeOperationMaximum 378 } EFI_PCI_IO_PROTOCOL_ATTRIBUTE_OPERATION; 379 380 typedef struct { 381 u32 read; 382 u32 write; 383 } efi_pci_io_protocol_access_32_t; 384 385 typedef struct { 386 u64 read; 387 u64 write; 388 } efi_pci_io_protocol_access_64_t; 389 390 typedef struct { 391 void *read; 392 void *write; 393 } efi_pci_io_protocol_access_t; 394 395 typedef struct { 396 u32 poll_mem; 397 u32 poll_io; 398 efi_pci_io_protocol_access_32_t mem; 399 efi_pci_io_protocol_access_32_t io; 400 efi_pci_io_protocol_access_32_t pci; 401 u32 copy_mem; 402 u32 map; 403 u32 unmap; 404 u32 allocate_buffer; 405 u32 free_buffer; 406 u32 flush; 407 u32 get_location; 408 u32 attributes; 409 u32 get_bar_attributes; 410 u32 set_bar_attributes; 411 u64 romsize; 412 u32 romimage; 413 } efi_pci_io_protocol_32_t; 414 415 typedef struct { 416 u64 poll_mem; 417 u64 poll_io; 418 efi_pci_io_protocol_access_64_t mem; 419 efi_pci_io_protocol_access_64_t io; 420 efi_pci_io_protocol_access_64_t pci; 421 u64 copy_mem; 422 u64 map; 423 u64 unmap; 424 u64 allocate_buffer; 425 u64 free_buffer; 426 u64 flush; 427 u64 get_location; 428 u64 attributes; 429 u64 get_bar_attributes; 430 u64 set_bar_attributes; 431 u64 romsize; 432 u64 romimage; 433 } efi_pci_io_protocol_64_t; 434 435 typedef struct { 436 void *poll_mem; 437 void *poll_io; 438 efi_pci_io_protocol_access_t mem; 439 efi_pci_io_protocol_access_t io; 440 efi_pci_io_protocol_access_t pci; 441 void *copy_mem; 442 void *map; 443 void *unmap; 444 void *allocate_buffer; 445 void *free_buffer; 446 void *flush; 447 void *get_location; 448 void *attributes; 449 void *get_bar_attributes; 450 void *set_bar_attributes; 451 uint64_t romsize; 452 void *romimage; 453 } efi_pci_io_protocol_t; 454 455 #define EFI_PCI_IO_ATTRIBUTE_ISA_MOTHERBOARD_IO 0x0001 456 #define EFI_PCI_IO_ATTRIBUTE_ISA_IO 0x0002 457 #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO 0x0004 458 #define EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY 0x0008 459 #define EFI_PCI_IO_ATTRIBUTE_VGA_IO 0x0010 460 #define EFI_PCI_IO_ATTRIBUTE_IDE_PRIMARY_IO 0x0020 461 #define EFI_PCI_IO_ATTRIBUTE_IDE_SECONDARY_IO 0x0040 462 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_WRITE_COMBINE 0x0080 463 #define EFI_PCI_IO_ATTRIBUTE_IO 0x0100 464 #define EFI_PCI_IO_ATTRIBUTE_MEMORY 0x0200 465 #define EFI_PCI_IO_ATTRIBUTE_BUS_MASTER 0x0400 466 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_CACHED 0x0800 467 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_DISABLE 0x1000 468 #define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_DEVICE 0x2000 469 #define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_ROM 0x4000 470 #define EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE 0x8000 471 #define EFI_PCI_IO_ATTRIBUTE_ISA_IO_16 0x10000 472 #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO_16 0x20000 473 #define EFI_PCI_IO_ATTRIBUTE_VGA_IO_16 0x40000 474 475 typedef struct { 476 u32 version; 477 u32 get; 478 u32 set; 479 u32 del; 480 u32 get_all; 481 } apple_properties_protocol_32_t; 482 483 typedef struct { 484 u64 version; 485 u64 get; 486 u64 set; 487 u64 del; 488 u64 get_all; 489 } apple_properties_protocol_64_t; 490 491 typedef struct { 492 u32 get_capability; 493 u32 get_event_log; 494 u32 hash_log_extend_event; 495 u32 submit_command; 496 u32 get_active_pcr_banks; 497 u32 set_active_pcr_banks; 498 u32 get_result_of_set_active_pcr_banks; 499 } efi_tcg2_protocol_32_t; 500 501 typedef struct { 502 u64 get_capability; 503 u64 get_event_log; 504 u64 hash_log_extend_event; 505 u64 submit_command; 506 u64 get_active_pcr_banks; 507 u64 set_active_pcr_banks; 508 u64 get_result_of_set_active_pcr_banks; 509 } efi_tcg2_protocol_64_t; 510 511 typedef u32 efi_tcg2_event_log_format; 512 513 typedef struct { 514 void *get_capability; 515 efi_status_t (*get_event_log)(efi_handle_t, efi_tcg2_event_log_format, 516 efi_physical_addr_t *, efi_physical_addr_t *, efi_bool_t *); 517 void *hash_log_extend_event; 518 void *submit_command; 519 void *get_active_pcr_banks; 520 void *set_active_pcr_banks; 521 void *get_result_of_set_active_pcr_banks; 522 } efi_tcg2_protocol_t; 523 524 /* 525 * Types and defines for EFI ResetSystem 526 */ 527 #define EFI_RESET_COLD 0 528 #define EFI_RESET_WARM 1 529 #define EFI_RESET_SHUTDOWN 2 530 531 /* 532 * EFI Runtime Services table 533 */ 534 #define EFI_RUNTIME_SERVICES_SIGNATURE ((u64)0x5652453544e5552ULL) 535 #define EFI_RUNTIME_SERVICES_REVISION 0x00010000 536 537 typedef struct { 538 efi_table_hdr_t hdr; 539 u32 get_time; 540 u32 set_time; 541 u32 get_wakeup_time; 542 u32 set_wakeup_time; 543 u32 set_virtual_address_map; 544 u32 convert_pointer; 545 u32 get_variable; 546 u32 get_next_variable; 547 u32 set_variable; 548 u32 get_next_high_mono_count; 549 u32 reset_system; 550 u32 update_capsule; 551 u32 query_capsule_caps; 552 u32 query_variable_info; 553 } efi_runtime_services_32_t; 554 555 typedef struct { 556 efi_table_hdr_t hdr; 557 u64 get_time; 558 u64 set_time; 559 u64 get_wakeup_time; 560 u64 set_wakeup_time; 561 u64 set_virtual_address_map; 562 u64 convert_pointer; 563 u64 get_variable; 564 u64 get_next_variable; 565 u64 set_variable; 566 u64 get_next_high_mono_count; 567 u64 reset_system; 568 u64 update_capsule; 569 u64 query_capsule_caps; 570 u64 query_variable_info; 571 } efi_runtime_services_64_t; 572 573 typedef efi_status_t efi_get_time_t (efi_time_t *tm, efi_time_cap_t *tc); 574 typedef efi_status_t efi_set_time_t (efi_time_t *tm); 575 typedef efi_status_t efi_get_wakeup_time_t (efi_bool_t *enabled, efi_bool_t *pending, 576 efi_time_t *tm); 577 typedef efi_status_t efi_set_wakeup_time_t (efi_bool_t enabled, efi_time_t *tm); 578 typedef efi_status_t efi_get_variable_t (efi_char16_t *name, efi_guid_t *vendor, u32 *attr, 579 unsigned long *data_size, void *data); 580 typedef efi_status_t efi_get_next_variable_t (unsigned long *name_size, efi_char16_t *name, 581 efi_guid_t *vendor); 582 typedef efi_status_t efi_set_variable_t (efi_char16_t *name, efi_guid_t *vendor, 583 u32 attr, unsigned long data_size, 584 void *data); 585 typedef efi_status_t efi_get_next_high_mono_count_t (u32 *count); 586 typedef void efi_reset_system_t (int reset_type, efi_status_t status, 587 unsigned long data_size, efi_char16_t *data); 588 typedef efi_status_t efi_set_virtual_address_map_t (unsigned long memory_map_size, 589 unsigned long descriptor_size, 590 u32 descriptor_version, 591 efi_memory_desc_t *virtual_map); 592 typedef efi_status_t efi_query_variable_info_t(u32 attr, 593 u64 *storage_space, 594 u64 *remaining_space, 595 u64 *max_variable_size); 596 typedef efi_status_t efi_update_capsule_t(efi_capsule_header_t **capsules, 597 unsigned long count, 598 unsigned long sg_list); 599 typedef efi_status_t efi_query_capsule_caps_t(efi_capsule_header_t **capsules, 600 unsigned long count, 601 u64 *max_size, 602 int *reset_type); 603 typedef efi_status_t efi_query_variable_store_t(u32 attributes, 604 unsigned long size, 605 bool nonblocking); 606 607 typedef struct { 608 efi_table_hdr_t hdr; 609 efi_get_time_t *get_time; 610 efi_set_time_t *set_time; 611 efi_get_wakeup_time_t *get_wakeup_time; 612 efi_set_wakeup_time_t *set_wakeup_time; 613 efi_set_virtual_address_map_t *set_virtual_address_map; 614 void *convert_pointer; 615 efi_get_variable_t *get_variable; 616 efi_get_next_variable_t *get_next_variable; 617 efi_set_variable_t *set_variable; 618 efi_get_next_high_mono_count_t *get_next_high_mono_count; 619 efi_reset_system_t *reset_system; 620 efi_update_capsule_t *update_capsule; 621 efi_query_capsule_caps_t *query_capsule_caps; 622 efi_query_variable_info_t *query_variable_info; 623 } efi_runtime_services_t; 624 625 void efi_native_runtime_setup(void); 626 627 /* 628 * EFI Configuration Table and GUID definitions 629 * 630 * These are all defined in a single line to make them easier to 631 * grep for and to see them at a glance - while still having a 632 * similar structure to the definitions in the spec. 633 * 634 * Here's how they are structured: 635 * 636 * GUID: 12345678-1234-1234-1234-123456789012 637 * Spec: 638 * #define EFI_SOME_PROTOCOL_GUID \ 639 * {0x12345678,0x1234,0x1234,\ 640 * {0x12,0x34,0x12,0x34,0x56,0x78,0x90,0x12}} 641 * Here: 642 * #define SOME_PROTOCOL_GUID EFI_GUID(0x12345678, 0x1234, 0x1234, 0x12, 0x34, 0x12, 0x34, 0x56, 0x78, 0x90, 0x12) 643 * ^ tabs ^extra space 644 * 645 * Note that the 'extra space' separates the values at the same place 646 * where the UEFI SPEC breaks the line. 647 */ 648 #define NULL_GUID EFI_GUID(0x00000000, 0x0000, 0x0000, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00) 649 #define MPS_TABLE_GUID EFI_GUID(0xeb9d2d2f, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d) 650 #define ACPI_TABLE_GUID EFI_GUID(0xeb9d2d30, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d) 651 #define ACPI_20_TABLE_GUID EFI_GUID(0x8868e871, 0xe4f1, 0x11d3, 0xbc, 0x22, 0x00, 0x80, 0xc7, 0x3c, 0x88, 0x81) 652 #define SMBIOS_TABLE_GUID EFI_GUID(0xeb9d2d31, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d) 653 #define SMBIOS3_TABLE_GUID EFI_GUID(0xf2fd1544, 0x9794, 0x4a2c, 0x99, 0x2e, 0xe5, 0xbb, 0xcf, 0x20, 0xe3, 0x94) 654 #define SAL_SYSTEM_TABLE_GUID EFI_GUID(0xeb9d2d32, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d) 655 #define HCDP_TABLE_GUID EFI_GUID(0xf951938d, 0x620b, 0x42ef, 0x82, 0x79, 0xa8, 0x4b, 0x79, 0x61, 0x78, 0x98) 656 #define UGA_IO_PROTOCOL_GUID EFI_GUID(0x61a4d49e, 0x6f68, 0x4f1b, 0xb9, 0x22, 0xa8, 0x6e, 0xed, 0x0b, 0x07, 0xa2) 657 #define EFI_GLOBAL_VARIABLE_GUID EFI_GUID(0x8be4df61, 0x93ca, 0x11d2, 0xaa, 0x0d, 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c) 658 #define UV_SYSTEM_TABLE_GUID EFI_GUID(0x3b13a7d4, 0x633e, 0x11dd, 0x93, 0xec, 0xda, 0x25, 0x56, 0xd8, 0x95, 0x93) 659 #define LINUX_EFI_CRASH_GUID EFI_GUID(0xcfc8fc79, 0xbe2e, 0x4ddc, 0x97, 0xf0, 0x9f, 0x98, 0xbf, 0xe2, 0x98, 0xa0) 660 #define LOADED_IMAGE_PROTOCOL_GUID EFI_GUID(0x5b1b31a1, 0x9562, 0x11d2, 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b) 661 #define EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID EFI_GUID(0x9042a9de, 0x23dc, 0x4a38, 0x96, 0xfb, 0x7a, 0xde, 0xd0, 0x80, 0x51, 0x6a) 662 #define EFI_UGA_PROTOCOL_GUID EFI_GUID(0x982c298b, 0xf4fa, 0x41cb, 0xb8, 0x38, 0x77, 0xaa, 0x68, 0x8f, 0xb8, 0x39) 663 #define EFI_PCI_IO_PROTOCOL_GUID EFI_GUID(0x4cf5b200, 0x68b8, 0x4ca5, 0x9e, 0xec, 0xb2, 0x3e, 0x3f, 0x50, 0x02, 0x9a) 664 #define EFI_FILE_INFO_ID EFI_GUID(0x09576e92, 0x6d3f, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b) 665 #define EFI_SYSTEM_RESOURCE_TABLE_GUID EFI_GUID(0xb122a263, 0x3661, 0x4f68, 0x99, 0x29, 0x78, 0xf8, 0xb0, 0xd6, 0x21, 0x80) 666 #define EFI_FILE_SYSTEM_GUID EFI_GUID(0x964e5b22, 0x6459, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b) 667 #define DEVICE_TREE_GUID EFI_GUID(0xb1b621d5, 0xf19c, 0x41a5, 0x83, 0x0b, 0xd9, 0x15, 0x2c, 0x69, 0xaa, 0xe0) 668 #define EFI_PROPERTIES_TABLE_GUID EFI_GUID(0x880aaca3, 0x4adc, 0x4a04, 0x90, 0x79, 0xb7, 0x47, 0x34, 0x08, 0x25, 0xe5) 669 #define EFI_RNG_PROTOCOL_GUID EFI_GUID(0x3152bca5, 0xeade, 0x433d, 0x86, 0x2e, 0xc0, 0x1c, 0xdc, 0x29, 0x1f, 0x44) 670 #define EFI_RNG_ALGORITHM_RAW EFI_GUID(0xe43176d7, 0xb6e8, 0x4827, 0xb7, 0x84, 0x7f, 0xfd, 0xc4, 0xb6, 0x85, 0x61) 671 #define EFI_MEMORY_ATTRIBUTES_TABLE_GUID EFI_GUID(0xdcfa911d, 0x26eb, 0x469f, 0xa2, 0x20, 0x38, 0xb7, 0xdc, 0x46, 0x12, 0x20) 672 #define EFI_CONSOLE_OUT_DEVICE_GUID EFI_GUID(0xd3b36f2c, 0xd551, 0x11d4, 0x9a, 0x46, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d) 673 #define APPLE_PROPERTIES_PROTOCOL_GUID EFI_GUID(0x91bd12fe, 0xf6c3, 0x44fb, 0xa5, 0xb7, 0x51, 0x22, 0xab, 0x30, 0x3a, 0xe0) 674 #define EFI_TCG2_PROTOCOL_GUID EFI_GUID(0x607f766c, 0x7455, 0x42be, 0x93, 0x0b, 0xe4, 0xd7, 0x6d, 0xb2, 0x72, 0x0f) 675 676 #define EFI_IMAGE_SECURITY_DATABASE_GUID EFI_GUID(0xd719b2cb, 0x3d3a, 0x4596, 0xa3, 0xbc, 0xda, 0xd0, 0x0e, 0x67, 0x65, 0x6f) 677 #define EFI_SHIM_LOCK_GUID EFI_GUID(0x605dab50, 0xe046, 0x4300, 0xab, 0xb6, 0x3d, 0xd8, 0x10, 0xdd, 0x8b, 0x23) 678 679 #define EFI_CERT_SHA256_GUID EFI_GUID(0xc1c41626, 0x504c, 0x4092, 0xac, 0xa9, 0x41, 0xf9, 0x36, 0x93, 0x43, 0x28) 680 #define EFI_CERT_X509_GUID EFI_GUID(0xa5c059a1, 0x94e4, 0x4aa7, 0x87, 0xb5, 0xab, 0x15, 0x5c, 0x2b, 0xf0, 0x72) 681 #define EFI_CERT_X509_SHA256_GUID EFI_GUID(0x3bd2a492, 0x96c0, 0x4079, 0xb4, 0x20, 0xfc, 0xf9, 0x8e, 0xf1, 0x03, 0xed) 682 683 /* 684 * This GUID is used to pass to the kernel proper the struct screen_info 685 * structure that was populated by the stub based on the GOP protocol instance 686 * associated with ConOut 687 */ 688 #define LINUX_EFI_ARM_SCREEN_INFO_TABLE_GUID EFI_GUID(0xe03fc20a, 0x85dc, 0x406e, 0xb9, 0x0e, 0x4a, 0xb5, 0x02, 0x37, 0x1d, 0x95) 689 #define LINUX_EFI_LOADER_ENTRY_GUID EFI_GUID(0x4a67b082, 0x0a4c, 0x41cf, 0xb6, 0xc7, 0x44, 0x0b, 0x29, 0xbb, 0x8c, 0x4f) 690 #define LINUX_EFI_RANDOM_SEED_TABLE_GUID EFI_GUID(0x1ce1e5bc, 0x7ceb, 0x42f2, 0x81, 0xe5, 0x8a, 0xad, 0xf1, 0x80, 0xf5, 0x7b) 691 #define LINUX_EFI_TPM_EVENT_LOG_GUID EFI_GUID(0xb7799cb0, 0xeca2, 0x4943, 0x96, 0x67, 0x1f, 0xae, 0x07, 0xb7, 0x47, 0xfa) 692 #define LINUX_EFI_MEMRESERVE_TABLE_GUID EFI_GUID(0x888eb0c6, 0x8ede, 0x4ff5, 0xa8, 0xf0, 0x9a, 0xee, 0x5c, 0xb9, 0x77, 0xc2) 693 694 typedef struct { 695 efi_guid_t guid; 696 u64 table; 697 } efi_config_table_64_t; 698 699 typedef struct { 700 efi_guid_t guid; 701 u32 table; 702 } efi_config_table_32_t; 703 704 typedef struct { 705 efi_guid_t guid; 706 unsigned long table; 707 } efi_config_table_t; 708 709 typedef struct { 710 efi_guid_t guid; 711 const char *name; 712 unsigned long *ptr; 713 } efi_config_table_type_t; 714 715 #define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL) 716 717 #define EFI_2_30_SYSTEM_TABLE_REVISION ((2 << 16) | (30)) 718 #define EFI_2_20_SYSTEM_TABLE_REVISION ((2 << 16) | (20)) 719 #define EFI_2_10_SYSTEM_TABLE_REVISION ((2 << 16) | (10)) 720 #define EFI_2_00_SYSTEM_TABLE_REVISION ((2 << 16) | (00)) 721 #define EFI_1_10_SYSTEM_TABLE_REVISION ((1 << 16) | (10)) 722 #define EFI_1_02_SYSTEM_TABLE_REVISION ((1 << 16) | (02)) 723 724 typedef struct { 725 efi_table_hdr_t hdr; 726 u64 fw_vendor; /* physical addr of CHAR16 vendor string */ 727 u32 fw_revision; 728 u32 __pad1; 729 u64 con_in_handle; 730 u64 con_in; 731 u64 con_out_handle; 732 u64 con_out; 733 u64 stderr_handle; 734 u64 stderr; 735 u64 runtime; 736 u64 boottime; 737 u32 nr_tables; 738 u32 __pad2; 739 u64 tables; 740 } efi_system_table_64_t; 741 742 typedef struct { 743 efi_table_hdr_t hdr; 744 u32 fw_vendor; /* physical addr of CHAR16 vendor string */ 745 u32 fw_revision; 746 u32 con_in_handle; 747 u32 con_in; 748 u32 con_out_handle; 749 u32 con_out; 750 u32 stderr_handle; 751 u32 stderr; 752 u32 runtime; 753 u32 boottime; 754 u32 nr_tables; 755 u32 tables; 756 } efi_system_table_32_t; 757 758 typedef struct { 759 efi_table_hdr_t hdr; 760 unsigned long fw_vendor; /* physical addr of CHAR16 vendor string */ 761 u32 fw_revision; 762 unsigned long con_in_handle; 763 unsigned long con_in; 764 unsigned long con_out_handle; 765 unsigned long con_out; 766 unsigned long stderr_handle; 767 unsigned long stderr; 768 efi_runtime_services_t *runtime; 769 efi_boot_services_t *boottime; 770 unsigned long nr_tables; 771 unsigned long tables; 772 } efi_system_table_t; 773 774 /* 775 * Architecture independent structure for describing a memory map for the 776 * benefit of efi_memmap_init_early(), saving us the need to pass four 777 * parameters. 778 */ 779 struct efi_memory_map_data { 780 phys_addr_t phys_map; 781 unsigned long size; 782 unsigned long desc_version; 783 unsigned long desc_size; 784 }; 785 786 struct efi_memory_map { 787 phys_addr_t phys_map; 788 void *map; 789 void *map_end; 790 int nr_map; 791 unsigned long desc_version; 792 unsigned long desc_size; 793 bool late; 794 }; 795 796 struct efi_mem_range { 797 struct range range; 798 u64 attribute; 799 }; 800 801 struct efi_fdt_params { 802 u64 system_table; 803 u64 mmap; 804 u32 mmap_size; 805 u32 desc_size; 806 u32 desc_ver; 807 }; 808 809 typedef struct { 810 u32 revision; 811 u32 parent_handle; 812 u32 system_table; 813 u32 device_handle; 814 u32 file_path; 815 u32 reserved; 816 u32 load_options_size; 817 u32 load_options; 818 u32 image_base; 819 __aligned_u64 image_size; 820 unsigned int image_code_type; 821 unsigned int image_data_type; 822 unsigned long unload; 823 } efi_loaded_image_32_t; 824 825 typedef struct { 826 u32 revision; 827 u64 parent_handle; 828 u64 system_table; 829 u64 device_handle; 830 u64 file_path; 831 u64 reserved; 832 u32 load_options_size; 833 u64 load_options; 834 u64 image_base; 835 __aligned_u64 image_size; 836 unsigned int image_code_type; 837 unsigned int image_data_type; 838 unsigned long unload; 839 } efi_loaded_image_64_t; 840 841 typedef struct { 842 u32 revision; 843 void *parent_handle; 844 efi_system_table_t *system_table; 845 void *device_handle; 846 void *file_path; 847 void *reserved; 848 u32 load_options_size; 849 void *load_options; 850 void *image_base; 851 __aligned_u64 image_size; 852 unsigned int image_code_type; 853 unsigned int image_data_type; 854 unsigned long unload; 855 } efi_loaded_image_t; 856 857 858 typedef struct { 859 u64 size; 860 u64 file_size; 861 u64 phys_size; 862 efi_time_t create_time; 863 efi_time_t last_access_time; 864 efi_time_t modification_time; 865 __aligned_u64 attribute; 866 efi_char16_t filename[1]; 867 } efi_file_info_t; 868 869 typedef struct { 870 u64 revision; 871 u32 open; 872 u32 close; 873 u32 delete; 874 u32 read; 875 u32 write; 876 u32 get_position; 877 u32 set_position; 878 u32 get_info; 879 u32 set_info; 880 u32 flush; 881 } efi_file_handle_32_t; 882 883 typedef struct { 884 u64 revision; 885 u64 open; 886 u64 close; 887 u64 delete; 888 u64 read; 889 u64 write; 890 u64 get_position; 891 u64 set_position; 892 u64 get_info; 893 u64 set_info; 894 u64 flush; 895 } efi_file_handle_64_t; 896 897 typedef struct _efi_file_handle { 898 u64 revision; 899 efi_status_t (*open)(struct _efi_file_handle *, 900 struct _efi_file_handle **, 901 efi_char16_t *, u64, u64); 902 efi_status_t (*close)(struct _efi_file_handle *); 903 void *delete; 904 efi_status_t (*read)(struct _efi_file_handle *, unsigned long *, 905 void *); 906 void *write; 907 void *get_position; 908 void *set_position; 909 efi_status_t (*get_info)(struct _efi_file_handle *, efi_guid_t *, 910 unsigned long *, void *); 911 void *set_info; 912 void *flush; 913 } efi_file_handle_t; 914 915 typedef struct { 916 u64 revision; 917 u32 open_volume; 918 } efi_file_io_interface_32_t; 919 920 typedef struct { 921 u64 revision; 922 u64 open_volume; 923 } efi_file_io_interface_64_t; 924 925 typedef struct _efi_file_io_interface { 926 u64 revision; 927 int (*open_volume)(struct _efi_file_io_interface *, 928 efi_file_handle_t **); 929 } efi_file_io_interface_t; 930 931 #define EFI_FILE_MODE_READ 0x0000000000000001 932 #define EFI_FILE_MODE_WRITE 0x0000000000000002 933 #define EFI_FILE_MODE_CREATE 0x8000000000000000 934 935 typedef struct { 936 u32 version; 937 u32 length; 938 u64 memory_protection_attribute; 939 } efi_properties_table_t; 940 941 #define EFI_PROPERTIES_TABLE_VERSION 0x00010000 942 #define EFI_PROPERTIES_RUNTIME_MEMORY_PROTECTION_NON_EXECUTABLE_PE_DATA 0x1 943 944 #define EFI_INVALID_TABLE_ADDR (~0UL) 945 946 typedef struct { 947 u32 version; 948 u32 num_entries; 949 u32 desc_size; 950 u32 reserved; 951 efi_memory_desc_t entry[0]; 952 } efi_memory_attributes_table_t; 953 954 typedef struct { 955 efi_guid_t signature_owner; 956 u8 signature_data[]; 957 } efi_signature_data_t; 958 959 typedef struct { 960 efi_guid_t signature_type; 961 u32 signature_list_size; 962 u32 signature_header_size; 963 u32 signature_size; 964 u8 signature_header[]; 965 /* efi_signature_data_t signatures[][] */ 966 } efi_signature_list_t; 967 968 typedef u8 efi_sha256_hash_t[32]; 969 970 typedef struct { 971 efi_sha256_hash_t to_be_signed_hash; 972 efi_time_t time_of_revocation; 973 } efi_cert_x509_sha256_t; 974 975 /* 976 * All runtime access to EFI goes through this structure: 977 */ 978 extern struct efi { 979 efi_system_table_t *systab; /* EFI system table */ 980 unsigned int runtime_version; /* Runtime services version */ 981 unsigned long mps; /* MPS table */ 982 unsigned long acpi; /* ACPI table (IA64 ext 0.71) */ 983 unsigned long acpi20; /* ACPI table (ACPI 2.0) */ 984 unsigned long smbios; /* SMBIOS table (32 bit entry point) */ 985 unsigned long smbios3; /* SMBIOS table (64 bit entry point) */ 986 unsigned long sal_systab; /* SAL system table */ 987 unsigned long boot_info; /* boot info table */ 988 unsigned long hcdp; /* HCDP table */ 989 unsigned long uga; /* UGA table */ 990 unsigned long uv_systab; /* UV system table */ 991 unsigned long fw_vendor; /* fw_vendor */ 992 unsigned long runtime; /* runtime table */ 993 unsigned long config_table; /* config tables */ 994 unsigned long esrt; /* ESRT table */ 995 unsigned long properties_table; /* properties table */ 996 unsigned long mem_attr_table; /* memory attributes table */ 997 unsigned long rng_seed; /* UEFI firmware random seed */ 998 unsigned long tpm_log; /* TPM2 Event Log table */ 999 unsigned long mem_reserve; /* Linux EFI memreserve table */ 1000 efi_get_time_t *get_time; 1001 efi_set_time_t *set_time; 1002 efi_get_wakeup_time_t *get_wakeup_time; 1003 efi_set_wakeup_time_t *set_wakeup_time; 1004 efi_get_variable_t *get_variable; 1005 efi_get_next_variable_t *get_next_variable; 1006 efi_set_variable_t *set_variable; 1007 efi_set_variable_t *set_variable_nonblocking; 1008 efi_query_variable_info_t *query_variable_info; 1009 efi_query_variable_info_t *query_variable_info_nonblocking; 1010 efi_update_capsule_t *update_capsule; 1011 efi_query_capsule_caps_t *query_capsule_caps; 1012 efi_get_next_high_mono_count_t *get_next_high_mono_count; 1013 efi_reset_system_t *reset_system; 1014 efi_set_virtual_address_map_t *set_virtual_address_map; 1015 struct efi_memory_map memmap; 1016 unsigned long flags; 1017 } efi; 1018 1019 extern struct mm_struct efi_mm; 1020 1021 static inline int 1022 efi_guidcmp (efi_guid_t left, efi_guid_t right) 1023 { 1024 return memcmp(&left, &right, sizeof (efi_guid_t)); 1025 } 1026 1027 static inline char * 1028 efi_guid_to_str(efi_guid_t *guid, char *out) 1029 { 1030 sprintf(out, "%pUl", guid->b); 1031 return out; 1032 } 1033 1034 extern void efi_init (void); 1035 extern void *efi_get_pal_addr (void); 1036 extern void efi_map_pal_code (void); 1037 extern void efi_memmap_walk (efi_freemem_callback_t callback, void *arg); 1038 extern void efi_gettimeofday (struct timespec64 *ts); 1039 extern void efi_enter_virtual_mode (void); /* switch EFI to virtual mode, if possible */ 1040 #ifdef CONFIG_X86 1041 extern efi_status_t efi_query_variable_store(u32 attributes, 1042 unsigned long size, 1043 bool nonblocking); 1044 extern void efi_find_mirror(void); 1045 #else 1046 1047 static inline efi_status_t efi_query_variable_store(u32 attributes, 1048 unsigned long size, 1049 bool nonblocking) 1050 { 1051 return EFI_SUCCESS; 1052 } 1053 #endif 1054 extern void __iomem *efi_lookup_mapped_addr(u64 phys_addr); 1055 1056 extern phys_addr_t __init efi_memmap_alloc(unsigned int num_entries); 1057 extern int __init efi_memmap_init_early(struct efi_memory_map_data *data); 1058 extern int __init efi_memmap_init_late(phys_addr_t addr, unsigned long size); 1059 extern void __init efi_memmap_unmap(void); 1060 extern int __init efi_memmap_install(phys_addr_t addr, unsigned int nr_map); 1061 extern int __init efi_memmap_split_count(efi_memory_desc_t *md, 1062 struct range *range); 1063 extern void __init efi_memmap_insert(struct efi_memory_map *old_memmap, 1064 void *buf, struct efi_mem_range *mem); 1065 1066 extern int efi_config_init(efi_config_table_type_t *arch_tables); 1067 #ifdef CONFIG_EFI_ESRT 1068 extern void __init efi_esrt_init(void); 1069 #else 1070 static inline void efi_esrt_init(void) { } 1071 #endif 1072 extern int efi_config_parse_tables(void *config_tables, int count, int sz, 1073 efi_config_table_type_t *arch_tables); 1074 extern u64 efi_get_iobase (void); 1075 extern int efi_mem_type(unsigned long phys_addr); 1076 extern u64 efi_mem_attributes (unsigned long phys_addr); 1077 extern u64 efi_mem_attribute (unsigned long phys_addr, unsigned long size); 1078 extern int __init efi_uart_console_only (void); 1079 extern u64 efi_mem_desc_end(efi_memory_desc_t *md); 1080 extern int efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md); 1081 extern void efi_mem_reserve(phys_addr_t addr, u64 size); 1082 extern int efi_mem_reserve_persistent(phys_addr_t addr, u64 size); 1083 extern void efi_initialize_iomem_resources(struct resource *code_resource, 1084 struct resource *data_resource, struct resource *bss_resource); 1085 extern int efi_get_fdt_params(struct efi_fdt_params *params); 1086 extern struct kobject *efi_kobj; 1087 1088 extern int efi_reboot_quirk_mode; 1089 extern bool efi_poweroff_required(void); 1090 1091 #ifdef CONFIG_EFI_FAKE_MEMMAP 1092 extern void __init efi_fake_memmap(void); 1093 #else 1094 static inline void efi_fake_memmap(void) { } 1095 #endif 1096 1097 /* 1098 * efi_memattr_perm_setter - arch specific callback function passed into 1099 * efi_memattr_apply_permissions() that updates the 1100 * mapping permissions described by the second 1101 * argument in the page tables referred to by the 1102 * first argument. 1103 */ 1104 typedef int (*efi_memattr_perm_setter)(struct mm_struct *, efi_memory_desc_t *); 1105 1106 extern int efi_memattr_init(void); 1107 extern int efi_memattr_apply_permissions(struct mm_struct *mm, 1108 efi_memattr_perm_setter fn); 1109 1110 /* 1111 * efi_early_memdesc_ptr - get the n-th EFI memmap descriptor 1112 * @map: the start of efi memmap 1113 * @desc_size: the size of space for each EFI memmap descriptor 1114 * @n: the index of efi memmap descriptor 1115 * 1116 * EFI boot service provides the GetMemoryMap() function to get a copy of the 1117 * current memory map which is an array of memory descriptors, each of 1118 * which describes a contiguous block of memory. It also gets the size of the 1119 * map, and the size of each descriptor, etc. 1120 * 1121 * Note that per section 6.2 of UEFI Spec 2.6 Errata A, the returned size of 1122 * each descriptor might not be equal to sizeof(efi_memory_memdesc_t), 1123 * since efi_memory_memdesc_t may be extended in the future. Thus the OS 1124 * MUST use the returned size of the descriptor to find the start of each 1125 * efi_memory_memdesc_t in the memory map array. This should only be used 1126 * during bootup since for_each_efi_memory_desc_xxx() is available after the 1127 * kernel initializes the EFI subsystem to set up struct efi_memory_map. 1128 */ 1129 #define efi_early_memdesc_ptr(map, desc_size, n) \ 1130 (efi_memory_desc_t *)((void *)(map) + ((n) * (desc_size))) 1131 1132 /* Iterate through an efi_memory_map */ 1133 #define for_each_efi_memory_desc_in_map(m, md) \ 1134 for ((md) = (m)->map; \ 1135 (md) && ((void *)(md) + (m)->desc_size) <= (m)->map_end; \ 1136 (md) = (void *)(md) + (m)->desc_size) 1137 1138 /** 1139 * for_each_efi_memory_desc - iterate over descriptors in efi.memmap 1140 * @md: the efi_memory_desc_t * iterator 1141 * 1142 * Once the loop finishes @md must not be accessed. 1143 */ 1144 #define for_each_efi_memory_desc(md) \ 1145 for_each_efi_memory_desc_in_map(&efi.memmap, md) 1146 1147 /* 1148 * Format an EFI memory descriptor's type and attributes to a user-provided 1149 * character buffer, as per snprintf(), and return the buffer. 1150 */ 1151 char * __init efi_md_typeattr_format(char *buf, size_t size, 1152 const efi_memory_desc_t *md); 1153 1154 1155 typedef void (*efi_element_handler_t)(const char *source, 1156 const void *element_data, 1157 size_t element_size); 1158 extern int __init parse_efi_signature_list( 1159 const char *source, 1160 const void *data, size_t size, 1161 efi_element_handler_t (*get_handler_for_guid)(const efi_guid_t *)); 1162 1163 /** 1164 * efi_range_is_wc - check the WC bit on an address range 1165 * @start: starting kvirt address 1166 * @len: length of range 1167 * 1168 * Consult the EFI memory map and make sure it's ok to set this range WC. 1169 * Returns true or false. 1170 */ 1171 static inline int efi_range_is_wc(unsigned long start, unsigned long len) 1172 { 1173 unsigned long i; 1174 1175 for (i = 0; i < len; i += (1UL << EFI_PAGE_SHIFT)) { 1176 unsigned long paddr = __pa(start + i); 1177 if (!(efi_mem_attributes(paddr) & EFI_MEMORY_WC)) 1178 return 0; 1179 } 1180 /* The range checked out */ 1181 return 1; 1182 } 1183 1184 #ifdef CONFIG_EFI_PCDP 1185 extern int __init efi_setup_pcdp_console(char *); 1186 #endif 1187 1188 /* 1189 * We play games with efi_enabled so that the compiler will, if 1190 * possible, remove EFI-related code altogether. 1191 */ 1192 #define EFI_BOOT 0 /* Were we booted from EFI? */ 1193 #define EFI_CONFIG_TABLES 2 /* Can we use EFI config tables? */ 1194 #define EFI_RUNTIME_SERVICES 3 /* Can we use runtime services? */ 1195 #define EFI_MEMMAP 4 /* Can we use EFI memory map? */ 1196 #define EFI_64BIT 5 /* Is the firmware 64-bit? */ 1197 #define EFI_PARAVIRT 6 /* Access is via a paravirt interface */ 1198 #define EFI_ARCH_1 7 /* First arch-specific bit */ 1199 #define EFI_DBG 8 /* Print additional debug info at runtime */ 1200 #define EFI_NX_PE_DATA 9 /* Can runtime data regions be mapped non-executable? */ 1201 #define EFI_MEM_ATTR 10 /* Did firmware publish an EFI_MEMORY_ATTRIBUTES table? */ 1202 1203 #ifdef CONFIG_EFI 1204 /* 1205 * Test whether the above EFI_* bits are enabled. 1206 */ 1207 static inline bool efi_enabled(int feature) 1208 { 1209 return test_bit(feature, &efi.flags) != 0; 1210 } 1211 extern void efi_reboot(enum reboot_mode reboot_mode, const char *__unused); 1212 1213 extern bool efi_is_table_address(unsigned long phys_addr); 1214 #else 1215 static inline bool efi_enabled(int feature) 1216 { 1217 return false; 1218 } 1219 static inline void 1220 efi_reboot(enum reboot_mode reboot_mode, const char *__unused) {} 1221 1222 static inline bool 1223 efi_capsule_pending(int *reset_type) 1224 { 1225 return false; 1226 } 1227 1228 static inline bool efi_is_table_address(unsigned long phys_addr) 1229 { 1230 return false; 1231 } 1232 #endif 1233 1234 extern int efi_status_to_err(efi_status_t status); 1235 1236 /* 1237 * Variable Attributes 1238 */ 1239 #define EFI_VARIABLE_NON_VOLATILE 0x0000000000000001 1240 #define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002 1241 #define EFI_VARIABLE_RUNTIME_ACCESS 0x0000000000000004 1242 #define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008 1243 #define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010 1244 #define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020 1245 #define EFI_VARIABLE_APPEND_WRITE 0x0000000000000040 1246 1247 #define EFI_VARIABLE_MASK (EFI_VARIABLE_NON_VOLATILE | \ 1248 EFI_VARIABLE_BOOTSERVICE_ACCESS | \ 1249 EFI_VARIABLE_RUNTIME_ACCESS | \ 1250 EFI_VARIABLE_HARDWARE_ERROR_RECORD | \ 1251 EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \ 1252 EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \ 1253 EFI_VARIABLE_APPEND_WRITE) 1254 /* 1255 * Length of a GUID string (strlen("aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee")) 1256 * not including trailing NUL 1257 */ 1258 #define EFI_VARIABLE_GUID_LEN UUID_STRING_LEN 1259 1260 /* 1261 * The type of search to perform when calling boottime->locate_handle 1262 */ 1263 #define EFI_LOCATE_ALL_HANDLES 0 1264 #define EFI_LOCATE_BY_REGISTER_NOTIFY 1 1265 #define EFI_LOCATE_BY_PROTOCOL 2 1266 1267 /* 1268 * EFI Device Path information 1269 */ 1270 #define EFI_DEV_HW 0x01 1271 #define EFI_DEV_PCI 1 1272 #define EFI_DEV_PCCARD 2 1273 #define EFI_DEV_MEM_MAPPED 3 1274 #define EFI_DEV_VENDOR 4 1275 #define EFI_DEV_CONTROLLER 5 1276 #define EFI_DEV_ACPI 0x02 1277 #define EFI_DEV_BASIC_ACPI 1 1278 #define EFI_DEV_EXPANDED_ACPI 2 1279 #define EFI_DEV_MSG 0x03 1280 #define EFI_DEV_MSG_ATAPI 1 1281 #define EFI_DEV_MSG_SCSI 2 1282 #define EFI_DEV_MSG_FC 3 1283 #define EFI_DEV_MSG_1394 4 1284 #define EFI_DEV_MSG_USB 5 1285 #define EFI_DEV_MSG_USB_CLASS 15 1286 #define EFI_DEV_MSG_I20 6 1287 #define EFI_DEV_MSG_MAC 11 1288 #define EFI_DEV_MSG_IPV4 12 1289 #define EFI_DEV_MSG_IPV6 13 1290 #define EFI_DEV_MSG_INFINIBAND 9 1291 #define EFI_DEV_MSG_UART 14 1292 #define EFI_DEV_MSG_VENDOR 10 1293 #define EFI_DEV_MEDIA 0x04 1294 #define EFI_DEV_MEDIA_HARD_DRIVE 1 1295 #define EFI_DEV_MEDIA_CDROM 2 1296 #define EFI_DEV_MEDIA_VENDOR 3 1297 #define EFI_DEV_MEDIA_FILE 4 1298 #define EFI_DEV_MEDIA_PROTOCOL 5 1299 #define EFI_DEV_BIOS_BOOT 0x05 1300 #define EFI_DEV_END_PATH 0x7F 1301 #define EFI_DEV_END_PATH2 0xFF 1302 #define EFI_DEV_END_INSTANCE 0x01 1303 #define EFI_DEV_END_ENTIRE 0xFF 1304 1305 struct efi_generic_dev_path { 1306 u8 type; 1307 u8 sub_type; 1308 u16 length; 1309 } __attribute ((packed)); 1310 1311 struct efi_dev_path { 1312 u8 type; /* can be replaced with unnamed */ 1313 u8 sub_type; /* struct efi_generic_dev_path; */ 1314 u16 length; /* once we've moved to -std=c11 */ 1315 union { 1316 struct { 1317 u32 hid; 1318 u32 uid; 1319 } acpi; 1320 struct { 1321 u8 fn; 1322 u8 dev; 1323 } pci; 1324 }; 1325 } __attribute ((packed)); 1326 1327 #if IS_ENABLED(CONFIG_EFI_DEV_PATH_PARSER) 1328 struct device *efi_get_device_by_path(struct efi_dev_path **node, size_t *len); 1329 #endif 1330 1331 static inline void memrange_efi_to_native(u64 *addr, u64 *npages) 1332 { 1333 *npages = PFN_UP(*addr + (*npages<<EFI_PAGE_SHIFT)) - PFN_DOWN(*addr); 1334 *addr &= PAGE_MASK; 1335 } 1336 1337 /* 1338 * EFI Variable support. 1339 * 1340 * Different firmware drivers can expose their EFI-like variables using 1341 * the following. 1342 */ 1343 1344 struct efivar_operations { 1345 efi_get_variable_t *get_variable; 1346 efi_get_next_variable_t *get_next_variable; 1347 efi_set_variable_t *set_variable; 1348 efi_set_variable_t *set_variable_nonblocking; 1349 efi_query_variable_store_t *query_variable_store; 1350 }; 1351 1352 struct efivars { 1353 struct kset *kset; 1354 struct kobject *kobject; 1355 const struct efivar_operations *ops; 1356 }; 1357 1358 /* 1359 * The maximum size of VariableName + Data = 1024 1360 * Therefore, it's reasonable to save that much 1361 * space in each part of the structure, 1362 * and we use a page for reading/writing. 1363 */ 1364 1365 #define EFI_VAR_NAME_LEN 1024 1366 1367 struct efi_variable { 1368 efi_char16_t VariableName[EFI_VAR_NAME_LEN/sizeof(efi_char16_t)]; 1369 efi_guid_t VendorGuid; 1370 unsigned long DataSize; 1371 __u8 Data[1024]; 1372 efi_status_t Status; 1373 __u32 Attributes; 1374 } __attribute__((packed)); 1375 1376 struct efivar_entry { 1377 struct efi_variable var; 1378 struct list_head list; 1379 struct kobject kobj; 1380 bool scanning; 1381 bool deleting; 1382 }; 1383 1384 typedef struct { 1385 u32 reset; 1386 u32 output_string; 1387 u32 test_string; 1388 } efi_simple_text_output_protocol_32_t; 1389 1390 typedef struct { 1391 u64 reset; 1392 u64 output_string; 1393 u64 test_string; 1394 } efi_simple_text_output_protocol_64_t; 1395 1396 struct efi_simple_text_output_protocol { 1397 void *reset; 1398 efi_status_t (*output_string)(void *, void *); 1399 void *test_string; 1400 }; 1401 1402 #define PIXEL_RGB_RESERVED_8BIT_PER_COLOR 0 1403 #define PIXEL_BGR_RESERVED_8BIT_PER_COLOR 1 1404 #define PIXEL_BIT_MASK 2 1405 #define PIXEL_BLT_ONLY 3 1406 #define PIXEL_FORMAT_MAX 4 1407 1408 struct efi_pixel_bitmask { 1409 u32 red_mask; 1410 u32 green_mask; 1411 u32 blue_mask; 1412 u32 reserved_mask; 1413 }; 1414 1415 struct efi_graphics_output_mode_info { 1416 u32 version; 1417 u32 horizontal_resolution; 1418 u32 vertical_resolution; 1419 int pixel_format; 1420 struct efi_pixel_bitmask pixel_information; 1421 u32 pixels_per_scan_line; 1422 } __packed; 1423 1424 struct efi_graphics_output_protocol_mode_32 { 1425 u32 max_mode; 1426 u32 mode; 1427 u32 info; 1428 u32 size_of_info; 1429 u64 frame_buffer_base; 1430 u32 frame_buffer_size; 1431 } __packed; 1432 1433 struct efi_graphics_output_protocol_mode_64 { 1434 u32 max_mode; 1435 u32 mode; 1436 u64 info; 1437 u64 size_of_info; 1438 u64 frame_buffer_base; 1439 u64 frame_buffer_size; 1440 } __packed; 1441 1442 struct efi_graphics_output_protocol_mode { 1443 u32 max_mode; 1444 u32 mode; 1445 unsigned long info; 1446 unsigned long size_of_info; 1447 u64 frame_buffer_base; 1448 unsigned long frame_buffer_size; 1449 } __packed; 1450 1451 struct efi_graphics_output_protocol_32 { 1452 u32 query_mode; 1453 u32 set_mode; 1454 u32 blt; 1455 u32 mode; 1456 }; 1457 1458 struct efi_graphics_output_protocol_64 { 1459 u64 query_mode; 1460 u64 set_mode; 1461 u64 blt; 1462 u64 mode; 1463 }; 1464 1465 struct efi_graphics_output_protocol { 1466 unsigned long query_mode; 1467 unsigned long set_mode; 1468 unsigned long blt; 1469 struct efi_graphics_output_protocol_mode *mode; 1470 }; 1471 1472 typedef efi_status_t (*efi_graphics_output_protocol_query_mode)( 1473 struct efi_graphics_output_protocol *, u32, unsigned long *, 1474 struct efi_graphics_output_mode_info **); 1475 1476 extern struct list_head efivar_sysfs_list; 1477 1478 static inline void 1479 efivar_unregister(struct efivar_entry *var) 1480 { 1481 kobject_put(&var->kobj); 1482 } 1483 1484 int efivars_register(struct efivars *efivars, 1485 const struct efivar_operations *ops, 1486 struct kobject *kobject); 1487 int efivars_unregister(struct efivars *efivars); 1488 struct kobject *efivars_kobject(void); 1489 1490 int efivar_init(int (*func)(efi_char16_t *, efi_guid_t, unsigned long, void *), 1491 void *data, bool duplicates, struct list_head *head); 1492 1493 int efivar_entry_add(struct efivar_entry *entry, struct list_head *head); 1494 int efivar_entry_remove(struct efivar_entry *entry); 1495 1496 int __efivar_entry_delete(struct efivar_entry *entry); 1497 int efivar_entry_delete(struct efivar_entry *entry); 1498 1499 int efivar_entry_size(struct efivar_entry *entry, unsigned long *size); 1500 int __efivar_entry_get(struct efivar_entry *entry, u32 *attributes, 1501 unsigned long *size, void *data); 1502 int efivar_entry_get(struct efivar_entry *entry, u32 *attributes, 1503 unsigned long *size, void *data); 1504 int efivar_entry_set(struct efivar_entry *entry, u32 attributes, 1505 unsigned long size, void *data, struct list_head *head); 1506 int efivar_entry_set_get_size(struct efivar_entry *entry, u32 attributes, 1507 unsigned long *size, void *data, bool *set); 1508 int efivar_entry_set_safe(efi_char16_t *name, efi_guid_t vendor, u32 attributes, 1509 bool block, unsigned long size, void *data); 1510 1511 int efivar_entry_iter_begin(void); 1512 void efivar_entry_iter_end(void); 1513 1514 int __efivar_entry_iter(int (*func)(struct efivar_entry *, void *), 1515 struct list_head *head, void *data, 1516 struct efivar_entry **prev); 1517 int efivar_entry_iter(int (*func)(struct efivar_entry *, void *), 1518 struct list_head *head, void *data); 1519 1520 struct efivar_entry *efivar_entry_find(efi_char16_t *name, efi_guid_t guid, 1521 struct list_head *head, bool remove); 1522 1523 bool efivar_validate(efi_guid_t vendor, efi_char16_t *var_name, u8 *data, 1524 unsigned long data_size); 1525 bool efivar_variable_is_removable(efi_guid_t vendor, const char *name, 1526 size_t len); 1527 1528 extern struct work_struct efivar_work; 1529 void efivar_run_worker(void); 1530 1531 #if defined(CONFIG_EFI_VARS) || defined(CONFIG_EFI_VARS_MODULE) 1532 int efivars_sysfs_init(void); 1533 1534 #define EFIVARS_DATA_SIZE_MAX 1024 1535 1536 #endif /* CONFIG_EFI_VARS */ 1537 extern bool efi_capsule_pending(int *reset_type); 1538 1539 extern int efi_capsule_supported(efi_guid_t guid, u32 flags, 1540 size_t size, int *reset); 1541 1542 extern int efi_capsule_update(efi_capsule_header_t *capsule, 1543 phys_addr_t *pages); 1544 1545 #ifdef CONFIG_EFI_RUNTIME_MAP 1546 int efi_runtime_map_init(struct kobject *); 1547 int efi_get_runtime_map_size(void); 1548 int efi_get_runtime_map_desc_size(void); 1549 int efi_runtime_map_copy(void *buf, size_t bufsz); 1550 #else 1551 static inline int efi_runtime_map_init(struct kobject *kobj) 1552 { 1553 return 0; 1554 } 1555 1556 static inline int efi_get_runtime_map_size(void) 1557 { 1558 return 0; 1559 } 1560 1561 static inline int efi_get_runtime_map_desc_size(void) 1562 { 1563 return 0; 1564 } 1565 1566 static inline int efi_runtime_map_copy(void *buf, size_t bufsz) 1567 { 1568 return 0; 1569 } 1570 1571 #endif 1572 1573 /* prototypes shared between arch specific and generic stub code */ 1574 1575 void efi_printk(efi_system_table_t *sys_table_arg, char *str); 1576 1577 void efi_free(efi_system_table_t *sys_table_arg, unsigned long size, 1578 unsigned long addr); 1579 1580 char *efi_convert_cmdline(efi_system_table_t *sys_table_arg, 1581 efi_loaded_image_t *image, int *cmd_line_len); 1582 1583 efi_status_t efi_get_memory_map(efi_system_table_t *sys_table_arg, 1584 struct efi_boot_memmap *map); 1585 1586 efi_status_t efi_low_alloc(efi_system_table_t *sys_table_arg, 1587 unsigned long size, unsigned long align, 1588 unsigned long *addr); 1589 1590 efi_status_t efi_high_alloc(efi_system_table_t *sys_table_arg, 1591 unsigned long size, unsigned long align, 1592 unsigned long *addr, unsigned long max); 1593 1594 efi_status_t efi_relocate_kernel(efi_system_table_t *sys_table_arg, 1595 unsigned long *image_addr, 1596 unsigned long image_size, 1597 unsigned long alloc_size, 1598 unsigned long preferred_addr, 1599 unsigned long alignment); 1600 1601 efi_status_t handle_cmdline_files(efi_system_table_t *sys_table_arg, 1602 efi_loaded_image_t *image, 1603 char *cmd_line, char *option_string, 1604 unsigned long max_addr, 1605 unsigned long *load_addr, 1606 unsigned long *load_size); 1607 1608 efi_status_t efi_parse_options(char const *cmdline); 1609 1610 efi_status_t efi_setup_gop(efi_system_table_t *sys_table_arg, 1611 struct screen_info *si, efi_guid_t *proto, 1612 unsigned long size); 1613 1614 #ifdef CONFIG_EFI 1615 extern bool efi_runtime_disabled(void); 1616 #else 1617 static inline bool efi_runtime_disabled(void) { return true; } 1618 #endif 1619 1620 extern void efi_call_virt_check_flags(unsigned long flags, const char *call); 1621 extern unsigned long efi_call_virt_save_flags(void); 1622 1623 enum efi_secureboot_mode { 1624 efi_secureboot_mode_unset, 1625 efi_secureboot_mode_unknown, 1626 efi_secureboot_mode_disabled, 1627 efi_secureboot_mode_enabled, 1628 }; 1629 enum efi_secureboot_mode efi_get_secureboot(efi_system_table_t *sys_table); 1630 1631 #ifdef CONFIG_RESET_ATTACK_MITIGATION 1632 void efi_enable_reset_attack_mitigation(efi_system_table_t *sys_table_arg); 1633 #else 1634 static inline void 1635 efi_enable_reset_attack_mitigation(efi_system_table_t *sys_table_arg) { } 1636 #endif 1637 1638 void efi_retrieve_tpm2_eventlog(efi_system_table_t *sys_table); 1639 1640 /* 1641 * Arch code can implement the following three template macros, avoiding 1642 * reptition for the void/non-void return cases of {__,}efi_call_virt(): 1643 * 1644 * * arch_efi_call_virt_setup() 1645 * 1646 * Sets up the environment for the call (e.g. switching page tables, 1647 * allowing kernel-mode use of floating point, if required). 1648 * 1649 * * arch_efi_call_virt() 1650 * 1651 * Performs the call. The last expression in the macro must be the call 1652 * itself, allowing the logic to be shared by the void and non-void 1653 * cases. 1654 * 1655 * * arch_efi_call_virt_teardown() 1656 * 1657 * Restores the usual kernel environment once the call has returned. 1658 */ 1659 1660 #define efi_call_virt_pointer(p, f, args...) \ 1661 ({ \ 1662 efi_status_t __s; \ 1663 unsigned long __flags; \ 1664 \ 1665 arch_efi_call_virt_setup(); \ 1666 \ 1667 __flags = efi_call_virt_save_flags(); \ 1668 __s = arch_efi_call_virt(p, f, args); \ 1669 efi_call_virt_check_flags(__flags, __stringify(f)); \ 1670 \ 1671 arch_efi_call_virt_teardown(); \ 1672 \ 1673 __s; \ 1674 }) 1675 1676 #define __efi_call_virt_pointer(p, f, args...) \ 1677 ({ \ 1678 unsigned long __flags; \ 1679 \ 1680 arch_efi_call_virt_setup(); \ 1681 \ 1682 __flags = efi_call_virt_save_flags(); \ 1683 arch_efi_call_virt(p, f, args); \ 1684 efi_call_virt_check_flags(__flags, __stringify(f)); \ 1685 \ 1686 arch_efi_call_virt_teardown(); \ 1687 }) 1688 1689 typedef efi_status_t (*efi_exit_boot_map_processing)( 1690 efi_system_table_t *sys_table_arg, 1691 struct efi_boot_memmap *map, 1692 void *priv); 1693 1694 efi_status_t efi_exit_boot_services(efi_system_table_t *sys_table, 1695 void *handle, 1696 struct efi_boot_memmap *map, 1697 void *priv, 1698 efi_exit_boot_map_processing priv_func); 1699 1700 #define EFI_RANDOM_SEED_SIZE 64U 1701 1702 struct linux_efi_random_seed { 1703 u32 size; 1704 u8 bits[]; 1705 }; 1706 1707 struct linux_efi_tpm_eventlog { 1708 u32 size; 1709 u8 version; 1710 u8 log[]; 1711 }; 1712 1713 extern int efi_tpm_eventlog_init(void); 1714 1715 /* 1716 * efi_runtime_service() function identifiers. 1717 * "NONE" is used by efi_recover_from_page_fault() to check if the page 1718 * fault happened while executing an efi runtime service. 1719 */ 1720 enum efi_rts_ids { 1721 EFI_NONE, 1722 EFI_GET_TIME, 1723 EFI_SET_TIME, 1724 EFI_GET_WAKEUP_TIME, 1725 EFI_SET_WAKEUP_TIME, 1726 EFI_GET_VARIABLE, 1727 EFI_GET_NEXT_VARIABLE, 1728 EFI_SET_VARIABLE, 1729 EFI_QUERY_VARIABLE_INFO, 1730 EFI_GET_NEXT_HIGH_MONO_COUNT, 1731 EFI_RESET_SYSTEM, 1732 EFI_UPDATE_CAPSULE, 1733 EFI_QUERY_CAPSULE_CAPS, 1734 }; 1735 1736 /* 1737 * efi_runtime_work: Details of EFI Runtime Service work 1738 * @arg<1-5>: EFI Runtime Service function arguments 1739 * @status: Status of executing EFI Runtime Service 1740 * @efi_rts_id: EFI Runtime Service function identifier 1741 * @efi_rts_comp: Struct used for handling completions 1742 */ 1743 struct efi_runtime_work { 1744 void *arg1; 1745 void *arg2; 1746 void *arg3; 1747 void *arg4; 1748 void *arg5; 1749 efi_status_t status; 1750 struct work_struct work; 1751 enum efi_rts_ids efi_rts_id; 1752 struct completion efi_rts_comp; 1753 }; 1754 1755 extern struct efi_runtime_work efi_rts_work; 1756 1757 /* Workqueue to queue EFI Runtime Services */ 1758 extern struct workqueue_struct *efi_rts_wq; 1759 1760 struct linux_efi_memreserve { 1761 int size; // allocated size of the array 1762 atomic_t count; // number of entries used 1763 phys_addr_t next; // pa of next struct instance 1764 struct { 1765 phys_addr_t base; 1766 phys_addr_t size; 1767 } entry[0]; 1768 }; 1769 1770 #define EFI_MEMRESERVE_SIZE(count) (sizeof(struct linux_efi_memreserve) + \ 1771 (count) * sizeof(((struct linux_efi_memreserve *)0)->entry[0])) 1772 1773 #define EFI_MEMRESERVE_COUNT(size) (((size) - sizeof(struct linux_efi_memreserve)) \ 1774 / sizeof(((struct linux_efi_memreserve *)0)->entry[0])) 1775 1776 #endif /* _LINUX_EFI_H */ 1777