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 <[email protected]> 11 * Copyright (C) 1999, 2002-2003 Hewlett-Packard Co. 12 * David Mosberger-Tang <[email protected]> 13 * Stephane Eranian <[email protected]> 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 28 #include <asm/page.h> 29 30 struct screen_info; 31 32 #define EFI_SUCCESS 0 33 #define EFI_LOAD_ERROR ( 1 | (1UL << (BITS_PER_LONG-1))) 34 #define EFI_INVALID_PARAMETER ( 2 | (1UL << (BITS_PER_LONG-1))) 35 #define EFI_UNSUPPORTED ( 3 | (1UL << (BITS_PER_LONG-1))) 36 #define EFI_BAD_BUFFER_SIZE ( 4 | (1UL << (BITS_PER_LONG-1))) 37 #define EFI_BUFFER_TOO_SMALL ( 5 | (1UL << (BITS_PER_LONG-1))) 38 #define EFI_NOT_READY ( 6 | (1UL << (BITS_PER_LONG-1))) 39 #define EFI_DEVICE_ERROR ( 7 | (1UL << (BITS_PER_LONG-1))) 40 #define EFI_WRITE_PROTECTED ( 8 | (1UL << (BITS_PER_LONG-1))) 41 #define EFI_OUT_OF_RESOURCES ( 9 | (1UL << (BITS_PER_LONG-1))) 42 #define EFI_NOT_FOUND (14 | (1UL << (BITS_PER_LONG-1))) 43 #define EFI_ACCESS_DENIED (15 | (1UL << (BITS_PER_LONG-1))) 44 #define EFI_TIMEOUT (18 | (1UL << (BITS_PER_LONG-1))) 45 #define EFI_ABORTED (21 | (1UL << (BITS_PER_LONG-1))) 46 #define EFI_SECURITY_VIOLATION (26 | (1UL << (BITS_PER_LONG-1))) 47 48 typedef unsigned long efi_status_t; 49 typedef u8 efi_bool_t; 50 typedef u16 efi_char16_t; /* UNICODE character */ 51 typedef u64 efi_physical_addr_t; 52 typedef void *efi_handle_t; 53 54 #if defined(CONFIG_X86_64) 55 #define __efiapi __attribute__((ms_abi)) 56 #elif defined(CONFIG_X86_32) 57 #define __efiapi __attribute__((regparm(0))) 58 #else 59 #define __efiapi 60 #endif 61 62 /* 63 * The UEFI spec and EDK2 reference implementation both define EFI_GUID as 64 * struct { u32 a; u16; b; u16 c; u8 d[8]; }; and so the implied alignment 65 * is 32 bits not 8 bits like our guid_t. In some cases (i.e., on 32-bit ARM), 66 * this means that firmware services invoked by the kernel may assume that 67 * efi_guid_t* arguments are 32-bit aligned, and use memory accessors that 68 * do not tolerate misalignment. So let's set the minimum alignment to 32 bits. 69 * 70 * Note that the UEFI spec as well as some comments in the EDK2 code base 71 * suggest that EFI_GUID should be 64-bit aligned, but this appears to be 72 * a mistake, given that no code seems to exist that actually enforces that 73 * or relies on it. 74 */ 75 typedef guid_t efi_guid_t __aligned(__alignof__(u32)); 76 77 #define EFI_GUID(a, b, c, d...) (efi_guid_t){ { \ 78 (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \ 79 (b) & 0xff, ((b) >> 8) & 0xff, \ 80 (c) & 0xff, ((c) >> 8) & 0xff, d } } 81 82 /* 83 * Generic EFI table header 84 */ 85 typedef struct { 86 u64 signature; 87 u32 revision; 88 u32 headersize; 89 u32 crc32; 90 u32 reserved; 91 } efi_table_hdr_t; 92 93 /* 94 * Memory map descriptor: 95 */ 96 97 /* Memory types: */ 98 #define EFI_RESERVED_TYPE 0 99 #define EFI_LOADER_CODE 1 100 #define EFI_LOADER_DATA 2 101 #define EFI_BOOT_SERVICES_CODE 3 102 #define EFI_BOOT_SERVICES_DATA 4 103 #define EFI_RUNTIME_SERVICES_CODE 5 104 #define EFI_RUNTIME_SERVICES_DATA 6 105 #define EFI_CONVENTIONAL_MEMORY 7 106 #define EFI_UNUSABLE_MEMORY 8 107 #define EFI_ACPI_RECLAIM_MEMORY 9 108 #define EFI_ACPI_MEMORY_NVS 10 109 #define EFI_MEMORY_MAPPED_IO 11 110 #define EFI_MEMORY_MAPPED_IO_PORT_SPACE 12 111 #define EFI_PAL_CODE 13 112 #define EFI_PERSISTENT_MEMORY 14 113 #define EFI_UNACCEPTED_MEMORY 15 114 #define EFI_MAX_MEMORY_TYPE 16 115 116 /* Attribute values: */ 117 #define EFI_MEMORY_UC ((u64)0x0000000000000001ULL) /* uncached */ 118 #define EFI_MEMORY_WC ((u64)0x0000000000000002ULL) /* write-coalescing */ 119 #define EFI_MEMORY_WT ((u64)0x0000000000000004ULL) /* write-through */ 120 #define EFI_MEMORY_WB ((u64)0x0000000000000008ULL) /* write-back */ 121 #define EFI_MEMORY_UCE ((u64)0x0000000000000010ULL) /* uncached, exported */ 122 #define EFI_MEMORY_WP ((u64)0x0000000000001000ULL) /* write-protect */ 123 #define EFI_MEMORY_RP ((u64)0x0000000000002000ULL) /* read-protect */ 124 #define EFI_MEMORY_XP ((u64)0x0000000000004000ULL) /* execute-protect */ 125 #define EFI_MEMORY_NV ((u64)0x0000000000008000ULL) /* non-volatile */ 126 #define EFI_MEMORY_MORE_RELIABLE \ 127 ((u64)0x0000000000010000ULL) /* higher reliability */ 128 #define EFI_MEMORY_RO ((u64)0x0000000000020000ULL) /* read-only */ 129 #define EFI_MEMORY_SP ((u64)0x0000000000040000ULL) /* soft reserved */ 130 #define EFI_MEMORY_CPU_CRYPTO ((u64)0x0000000000080000ULL) /* supports encryption */ 131 #define EFI_MEMORY_RUNTIME ((u64)0x8000000000000000ULL) /* range requires runtime mapping */ 132 #define EFI_MEMORY_DESCRIPTOR_VERSION 1 133 134 #define EFI_PAGE_SHIFT 12 135 #define EFI_PAGE_SIZE (1UL << EFI_PAGE_SHIFT) 136 #define EFI_PAGES_MAX (U64_MAX >> EFI_PAGE_SHIFT) 137 138 typedef struct { 139 u32 type; 140 u32 pad; 141 u64 phys_addr; 142 u64 virt_addr; 143 u64 num_pages; 144 u64 attribute; 145 } efi_memory_desc_t; 146 147 typedef struct { 148 efi_guid_t guid; 149 u32 headersize; 150 u32 flags; 151 u32 imagesize; 152 } efi_capsule_header_t; 153 154 /* EFI_FIRMWARE_MANAGEMENT_CAPSULE_HEADER */ 155 struct efi_manage_capsule_header { 156 u32 ver; 157 u16 emb_drv_cnt; 158 u16 payload_cnt; 159 /* 160 * Variable-size array of the size given by the sum of 161 * emb_drv_cnt and payload_cnt. 162 */ 163 u64 offset_list[]; 164 } __packed; 165 166 /* EFI_FIRMWARE_MANAGEMENT_CAPSULE_IMAGE_HEADER */ 167 struct efi_manage_capsule_image_header { 168 u32 ver; 169 efi_guid_t image_type_id; 170 u8 image_index; 171 u8 reserved_bytes[3]; 172 u32 image_size; 173 u32 vendor_code_size; 174 /* hw_ins was introduced in version 2 */ 175 u64 hw_ins; 176 /* capsule_support was introduced in version 3 */ 177 u64 capsule_support; 178 } __packed; 179 180 /* WIN_CERTIFICATE */ 181 struct win_cert { 182 u32 len; 183 u16 rev; 184 u16 cert_type; 185 }; 186 187 /* WIN_CERTIFICATE_UEFI_GUID */ 188 struct win_cert_uefi_guid { 189 struct win_cert hdr; 190 efi_guid_t cert_type; 191 u8 cert_data[]; 192 }; 193 194 /* EFI_FIRMWARE_IMAGE_AUTHENTICATION */ 195 struct efi_image_auth { 196 u64 mon_count; 197 struct win_cert_uefi_guid auth_info; 198 }; 199 200 /* 201 * EFI capsule flags 202 */ 203 #define EFI_CAPSULE_PERSIST_ACROSS_RESET 0x00010000 204 #define EFI_CAPSULE_POPULATE_SYSTEM_TABLE 0x00020000 205 #define EFI_CAPSULE_INITIATE_RESET 0x00040000 206 207 struct capsule_info { 208 efi_capsule_header_t header; 209 efi_capsule_header_t *capsule; 210 int reset_type; 211 long index; 212 size_t count; 213 size_t total_size; 214 struct page **pages; 215 phys_addr_t *phys; 216 size_t page_bytes_remain; 217 }; 218 219 int efi_capsule_setup_info(struct capsule_info *cap_info, void *kbuff, 220 size_t hdr_bytes); 221 int __efi_capsule_setup_info(struct capsule_info *cap_info); 222 223 /* 224 * Types and defines for Time Services 225 */ 226 #define EFI_TIME_ADJUST_DAYLIGHT 0x1 227 #define EFI_TIME_IN_DAYLIGHT 0x2 228 #define EFI_UNSPECIFIED_TIMEZONE 0x07ff 229 230 typedef struct { 231 u16 year; 232 u8 month; 233 u8 day; 234 u8 hour; 235 u8 minute; 236 u8 second; 237 u8 pad1; 238 u32 nanosecond; 239 s16 timezone; 240 u8 daylight; 241 u8 pad2; 242 } efi_time_t; 243 244 typedef struct { 245 u32 resolution; 246 u32 accuracy; 247 u8 sets_to_zero; 248 } efi_time_cap_t; 249 250 typedef union efi_boot_services efi_boot_services_t; 251 252 /* 253 * Types and defines for EFI ResetSystem 254 */ 255 #define EFI_RESET_COLD 0 256 #define EFI_RESET_WARM 1 257 #define EFI_RESET_SHUTDOWN 2 258 259 /* 260 * EFI Runtime Services table 261 */ 262 #define EFI_RUNTIME_SERVICES_SIGNATURE ((u64)0x5652453544e5552ULL) 263 #define EFI_RUNTIME_SERVICES_REVISION 0x00010000 264 265 typedef struct { 266 efi_table_hdr_t hdr; 267 u32 get_time; 268 u32 set_time; 269 u32 get_wakeup_time; 270 u32 set_wakeup_time; 271 u32 set_virtual_address_map; 272 u32 convert_pointer; 273 u32 get_variable; 274 u32 get_next_variable; 275 u32 set_variable; 276 u32 get_next_high_mono_count; 277 u32 reset_system; 278 u32 update_capsule; 279 u32 query_capsule_caps; 280 u32 query_variable_info; 281 } efi_runtime_services_32_t; 282 283 typedef efi_status_t efi_get_time_t (efi_time_t *tm, efi_time_cap_t *tc); 284 typedef efi_status_t efi_set_time_t (efi_time_t *tm); 285 typedef efi_status_t efi_get_wakeup_time_t (efi_bool_t *enabled, efi_bool_t *pending, 286 efi_time_t *tm); 287 typedef efi_status_t efi_set_wakeup_time_t (efi_bool_t enabled, efi_time_t *tm); 288 typedef efi_status_t efi_get_variable_t (efi_char16_t *name, efi_guid_t *vendor, u32 *attr, 289 unsigned long *data_size, void *data); 290 typedef efi_status_t efi_get_next_variable_t (unsigned long *name_size, efi_char16_t *name, 291 efi_guid_t *vendor); 292 typedef efi_status_t efi_set_variable_t (efi_char16_t *name, efi_guid_t *vendor, 293 u32 attr, unsigned long data_size, 294 void *data); 295 typedef efi_status_t efi_get_next_high_mono_count_t (u32 *count); 296 typedef void efi_reset_system_t (int reset_type, efi_status_t status, 297 unsigned long data_size, efi_char16_t *data); 298 typedef efi_status_t efi_set_virtual_address_map_t (unsigned long memory_map_size, 299 unsigned long descriptor_size, 300 u32 descriptor_version, 301 efi_memory_desc_t *virtual_map); 302 typedef efi_status_t efi_query_variable_info_t(u32 attr, 303 u64 *storage_space, 304 u64 *remaining_space, 305 u64 *max_variable_size); 306 typedef efi_status_t efi_update_capsule_t(efi_capsule_header_t **capsules, 307 unsigned long count, 308 unsigned long sg_list); 309 typedef efi_status_t efi_query_capsule_caps_t(efi_capsule_header_t **capsules, 310 unsigned long count, 311 u64 *max_size, 312 int *reset_type); 313 typedef efi_status_t efi_query_variable_store_t(u32 attributes, 314 unsigned long size, 315 bool nonblocking); 316 317 typedef union { 318 struct { 319 efi_table_hdr_t hdr; 320 efi_get_time_t __efiapi *get_time; 321 efi_set_time_t __efiapi *set_time; 322 efi_get_wakeup_time_t __efiapi *get_wakeup_time; 323 efi_set_wakeup_time_t __efiapi *set_wakeup_time; 324 efi_set_virtual_address_map_t __efiapi *set_virtual_address_map; 325 void *convert_pointer; 326 efi_get_variable_t __efiapi *get_variable; 327 efi_get_next_variable_t __efiapi *get_next_variable; 328 efi_set_variable_t __efiapi *set_variable; 329 efi_get_next_high_mono_count_t __efiapi *get_next_high_mono_count; 330 efi_reset_system_t __efiapi *reset_system; 331 efi_update_capsule_t __efiapi *update_capsule; 332 efi_query_capsule_caps_t __efiapi *query_capsule_caps; 333 efi_query_variable_info_t __efiapi *query_variable_info; 334 }; 335 efi_runtime_services_32_t mixed_mode; 336 } efi_runtime_services_t; 337 338 void efi_native_runtime_setup(void); 339 340 /* 341 * EFI Configuration Table and GUID definitions 342 * 343 * These are all defined in a single line to make them easier to 344 * grep for and to see them at a glance - while still having a 345 * similar structure to the definitions in the spec. 346 * 347 * Here's how they are structured: 348 * 349 * GUID: 12345678-1234-1234-1234-123456789012 350 * Spec: 351 * #define EFI_SOME_PROTOCOL_GUID \ 352 * {0x12345678,0x1234,0x1234,\ 353 * {0x12,0x34,0x12,0x34,0x56,0x78,0x90,0x12}} 354 * Here: 355 * #define SOME_PROTOCOL_GUID EFI_GUID(0x12345678, 0x1234, 0x1234, 0x12, 0x34, 0x12, 0x34, 0x56, 0x78, 0x90, 0x12) 356 * ^ tabs ^extra space 357 * 358 * Note that the 'extra space' separates the values at the same place 359 * where the UEFI SPEC breaks the line. 360 */ 361 #define NULL_GUID EFI_GUID(0x00000000, 0x0000, 0x0000, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00) 362 #define ACPI_TABLE_GUID EFI_GUID(0xeb9d2d30, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d) 363 #define ACPI_20_TABLE_GUID EFI_GUID(0x8868e871, 0xe4f1, 0x11d3, 0xbc, 0x22, 0x00, 0x80, 0xc7, 0x3c, 0x88, 0x81) 364 #define SMBIOS_TABLE_GUID EFI_GUID(0xeb9d2d31, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d) 365 #define SMBIOS3_TABLE_GUID EFI_GUID(0xf2fd1544, 0x9794, 0x4a2c, 0x99, 0x2e, 0xe5, 0xbb, 0xcf, 0x20, 0xe3, 0x94) 366 #define UGA_IO_PROTOCOL_GUID EFI_GUID(0x61a4d49e, 0x6f68, 0x4f1b, 0xb9, 0x22, 0xa8, 0x6e, 0xed, 0x0b, 0x07, 0xa2) 367 #define EFI_GLOBAL_VARIABLE_GUID EFI_GUID(0x8be4df61, 0x93ca, 0x11d2, 0xaa, 0x0d, 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c) 368 #define UV_SYSTEM_TABLE_GUID EFI_GUID(0x3b13a7d4, 0x633e, 0x11dd, 0x93, 0xec, 0xda, 0x25, 0x56, 0xd8, 0x95, 0x93) 369 #define LINUX_EFI_CRASH_GUID EFI_GUID(0xcfc8fc79, 0xbe2e, 0x4ddc, 0x97, 0xf0, 0x9f, 0x98, 0xbf, 0xe2, 0x98, 0xa0) 370 #define LOADED_IMAGE_PROTOCOL_GUID EFI_GUID(0x5b1b31a1, 0x9562, 0x11d2, 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b) 371 #define LOADED_IMAGE_DEVICE_PATH_PROTOCOL_GUID EFI_GUID(0xbc62157e, 0x3e33, 0x4fec, 0x99, 0x20, 0x2d, 0x3b, 0x36, 0xd7, 0x50, 0xdf) 372 #define EFI_DEVICE_PATH_PROTOCOL_GUID EFI_GUID(0x09576e91, 0x6d3f, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b) 373 #define EFI_DEVICE_PATH_TO_TEXT_PROTOCOL_GUID EFI_GUID(0x8b843e20, 0x8132, 0x4852, 0x90, 0xcc, 0x55, 0x1a, 0x4e, 0x4a, 0x7f, 0x1c) 374 #define EFI_DEVICE_PATH_FROM_TEXT_PROTOCOL_GUID EFI_GUID(0x05c99a21, 0xc70f, 0x4ad2, 0x8a, 0x5f, 0x35, 0xdf, 0x33, 0x43, 0xf5, 0x1e) 375 #define EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID EFI_GUID(0x9042a9de, 0x23dc, 0x4a38, 0x96, 0xfb, 0x7a, 0xde, 0xd0, 0x80, 0x51, 0x6a) 376 #define EFI_UGA_PROTOCOL_GUID EFI_GUID(0x982c298b, 0xf4fa, 0x41cb, 0xb8, 0x38, 0x77, 0xaa, 0x68, 0x8f, 0xb8, 0x39) 377 #define EFI_PCI_IO_PROTOCOL_GUID EFI_GUID(0x4cf5b200, 0x68b8, 0x4ca5, 0x9e, 0xec, 0xb2, 0x3e, 0x3f, 0x50, 0x02, 0x9a) 378 #define EFI_FILE_INFO_ID EFI_GUID(0x09576e92, 0x6d3f, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b) 379 #define EFI_SYSTEM_RESOURCE_TABLE_GUID EFI_GUID(0xb122a263, 0x3661, 0x4f68, 0x99, 0x29, 0x78, 0xf8, 0xb0, 0xd6, 0x21, 0x80) 380 #define EFI_FILE_SYSTEM_GUID EFI_GUID(0x964e5b22, 0x6459, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b) 381 #define DEVICE_TREE_GUID EFI_GUID(0xb1b621d5, 0xf19c, 0x41a5, 0x83, 0x0b, 0xd9, 0x15, 0x2c, 0x69, 0xaa, 0xe0) 382 #define EFI_PROPERTIES_TABLE_GUID EFI_GUID(0x880aaca3, 0x4adc, 0x4a04, 0x90, 0x79, 0xb7, 0x47, 0x34, 0x08, 0x25, 0xe5) 383 #define EFI_RNG_PROTOCOL_GUID EFI_GUID(0x3152bca5, 0xeade, 0x433d, 0x86, 0x2e, 0xc0, 0x1c, 0xdc, 0x29, 0x1f, 0x44) 384 #define EFI_RNG_ALGORITHM_RAW EFI_GUID(0xe43176d7, 0xb6e8, 0x4827, 0xb7, 0x84, 0x7f, 0xfd, 0xc4, 0xb6, 0x85, 0x61) 385 #define EFI_MEMORY_ATTRIBUTES_TABLE_GUID EFI_GUID(0xdcfa911d, 0x26eb, 0x469f, 0xa2, 0x20, 0x38, 0xb7, 0xdc, 0x46, 0x12, 0x20) 386 #define EFI_CONSOLE_OUT_DEVICE_GUID EFI_GUID(0xd3b36f2c, 0xd551, 0x11d4, 0x9a, 0x46, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d) 387 #define APPLE_PROPERTIES_PROTOCOL_GUID EFI_GUID(0x91bd12fe, 0xf6c3, 0x44fb, 0xa5, 0xb7, 0x51, 0x22, 0xab, 0x30, 0x3a, 0xe0) 388 #define EFI_TCG2_PROTOCOL_GUID EFI_GUID(0x607f766c, 0x7455, 0x42be, 0x93, 0x0b, 0xe4, 0xd7, 0x6d, 0xb2, 0x72, 0x0f) 389 #define EFI_LOAD_FILE_PROTOCOL_GUID EFI_GUID(0x56ec3091, 0x954c, 0x11d2, 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b) 390 #define EFI_LOAD_FILE2_PROTOCOL_GUID EFI_GUID(0x4006c0c1, 0xfcb3, 0x403e, 0x99, 0x6d, 0x4a, 0x6c, 0x87, 0x24, 0xe0, 0x6d) 391 #define EFI_RT_PROPERTIES_TABLE_GUID EFI_GUID(0xeb66918a, 0x7eef, 0x402a, 0x84, 0x2e, 0x93, 0x1d, 0x21, 0xc3, 0x8a, 0xe9) 392 #define EFI_DXE_SERVICES_TABLE_GUID EFI_GUID(0x05ad34ba, 0x6f02, 0x4214, 0x95, 0x2e, 0x4d, 0xa0, 0x39, 0x8e, 0x2b, 0xb9) 393 #define EFI_SMBIOS_PROTOCOL_GUID EFI_GUID(0x03583ff6, 0xcb36, 0x4940, 0x94, 0x7e, 0xb9, 0xb3, 0x9f, 0x4a, 0xfa, 0xf7) 394 #define EFI_MEMORY_ATTRIBUTE_PROTOCOL_GUID EFI_GUID(0xf4560cf6, 0x40ec, 0x4b4a, 0xa1, 0x92, 0xbf, 0x1d, 0x57, 0xd0, 0xb1, 0x89) 395 396 #define EFI_IMAGE_SECURITY_DATABASE_GUID EFI_GUID(0xd719b2cb, 0x3d3a, 0x4596, 0xa3, 0xbc, 0xda, 0xd0, 0x0e, 0x67, 0x65, 0x6f) 397 #define EFI_SHIM_LOCK_GUID EFI_GUID(0x605dab50, 0xe046, 0x4300, 0xab, 0xb6, 0x3d, 0xd8, 0x10, 0xdd, 0x8b, 0x23) 398 399 #define EFI_CERT_SHA256_GUID EFI_GUID(0xc1c41626, 0x504c, 0x4092, 0xac, 0xa9, 0x41, 0xf9, 0x36, 0x93, 0x43, 0x28) 400 #define EFI_CERT_X509_GUID EFI_GUID(0xa5c059a1, 0x94e4, 0x4aa7, 0x87, 0xb5, 0xab, 0x15, 0x5c, 0x2b, 0xf0, 0x72) 401 #define EFI_CERT_X509_SHA256_GUID EFI_GUID(0x3bd2a492, 0x96c0, 0x4079, 0xb4, 0x20, 0xfc, 0xf9, 0x8e, 0xf1, 0x03, 0xed) 402 #define EFI_CC_BLOB_GUID EFI_GUID(0x067b1f5f, 0xcf26, 0x44c5, 0x85, 0x54, 0x93, 0xd7, 0x77, 0x91, 0x2d, 0x42) 403 404 /* 405 * This GUID is used to pass to the kernel proper the struct screen_info 406 * structure that was populated by the stub based on the GOP protocol instance 407 * associated with ConOut 408 */ 409 #define LINUX_EFI_SCREEN_INFO_TABLE_GUID EFI_GUID(0xe03fc20a, 0x85dc, 0x406e, 0xb9, 0x0e, 0x4a, 0xb5, 0x02, 0x37, 0x1d, 0x95) 410 #define LINUX_EFI_ARM_CPU_STATE_TABLE_GUID EFI_GUID(0xef79e4aa, 0x3c3d, 0x4989, 0xb9, 0x02, 0x07, 0xa9, 0x43, 0xe5, 0x50, 0xd2) 411 #define LINUX_EFI_LOADER_ENTRY_GUID EFI_GUID(0x4a67b082, 0x0a4c, 0x41cf, 0xb6, 0xc7, 0x44, 0x0b, 0x29, 0xbb, 0x8c, 0x4f) 412 #define LINUX_EFI_RANDOM_SEED_TABLE_GUID EFI_GUID(0x1ce1e5bc, 0x7ceb, 0x42f2, 0x81, 0xe5, 0x8a, 0xad, 0xf1, 0x80, 0xf5, 0x7b) 413 #define LINUX_EFI_TPM_EVENT_LOG_GUID EFI_GUID(0xb7799cb0, 0xeca2, 0x4943, 0x96, 0x67, 0x1f, 0xae, 0x07, 0xb7, 0x47, 0xfa) 414 #define LINUX_EFI_TPM_FINAL_LOG_GUID EFI_GUID(0x1e2ed096, 0x30e2, 0x4254, 0xbd, 0x89, 0x86, 0x3b, 0xbe, 0xf8, 0x23, 0x25) 415 #define LINUX_EFI_MEMRESERVE_TABLE_GUID EFI_GUID(0x888eb0c6, 0x8ede, 0x4ff5, 0xa8, 0xf0, 0x9a, 0xee, 0x5c, 0xb9, 0x77, 0xc2) 416 #define LINUX_EFI_INITRD_MEDIA_GUID EFI_GUID(0x5568e427, 0x68fc, 0x4f3d, 0xac, 0x74, 0xca, 0x55, 0x52, 0x31, 0xcc, 0x68) 417 #define LINUX_EFI_MOK_VARIABLE_TABLE_GUID EFI_GUID(0xc451ed2b, 0x9694, 0x45d3, 0xba, 0xba, 0xed, 0x9f, 0x89, 0x88, 0xa3, 0x89) 418 #define LINUX_EFI_COCO_SECRET_AREA_GUID EFI_GUID(0xadf956ad, 0xe98c, 0x484c, 0xae, 0x11, 0xb5, 0x1c, 0x7d, 0x33, 0x64, 0x47) 419 #define LINUX_EFI_BOOT_MEMMAP_GUID EFI_GUID(0x800f683f, 0xd08b, 0x423a, 0xa2, 0x93, 0x96, 0x5c, 0x3c, 0x6f, 0xe2, 0xb4) 420 #define LINUX_EFI_UNACCEPTED_MEM_TABLE_GUID EFI_GUID(0xd5d1de3c, 0x105c, 0x44f9, 0x9e, 0xa9, 0xbc, 0xef, 0x98, 0x12, 0x00, 0x31) 421 422 #define RISCV_EFI_BOOT_PROTOCOL_GUID EFI_GUID(0xccd15fec, 0x6f73, 0x4eec, 0x83, 0x95, 0x3e, 0x69, 0xe4, 0xb9, 0x40, 0xbf) 423 424 /* 425 * This GUID may be installed onto the kernel image's handle as a NULL protocol 426 * to signal to the stub that the placement of the image should be respected, 427 * and moving the image in physical memory is undesirable. To ensure 428 * compatibility with 64k pages kernels with virtually mapped stacks, and to 429 * avoid defeating physical randomization, this protocol should only be 430 * installed if the image was placed at a randomized 128k aligned address in 431 * memory. 432 */ 433 #define LINUX_EFI_LOADED_IMAGE_FIXED_GUID EFI_GUID(0xf5a37b6d, 0x3344, 0x42a5, 0xb6, 0xbb, 0x97, 0x86, 0x48, 0xc1, 0x89, 0x0a) 434 435 /* OEM GUIDs */ 436 #define DELLEMC_EFI_RCI2_TABLE_GUID EFI_GUID(0x2d9f28a2, 0xa886, 0x456a, 0x97, 0xa8, 0xf1, 0x1e, 0xf2, 0x4f, 0xf4, 0x55) 437 #define AMD_SEV_MEM_ENCRYPT_GUID EFI_GUID(0x0cf29b71, 0x9e51, 0x433a, 0xa3, 0xb7, 0x81, 0xf3, 0xab, 0x16, 0xb8, 0x75) 438 439 /* OVMF protocol GUIDs */ 440 #define OVMF_SEV_MEMORY_ACCEPTANCE_PROTOCOL_GUID EFI_GUID(0xc5a010fe, 0x38a7, 0x4531, 0x8a, 0x4a, 0x05, 0x00, 0xd2, 0xfd, 0x16, 0x49) 441 442 typedef struct { 443 efi_guid_t guid; 444 u64 table; 445 } efi_config_table_64_t; 446 447 typedef struct { 448 efi_guid_t guid; 449 u32 table; 450 } efi_config_table_32_t; 451 452 typedef union { 453 struct { 454 efi_guid_t guid; 455 void *table; 456 }; 457 efi_config_table_32_t mixed_mode; 458 } efi_config_table_t; 459 460 typedef struct { 461 efi_guid_t guid; 462 unsigned long *ptr; 463 const char name[16]; 464 } efi_config_table_type_t; 465 466 #define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL) 467 #define EFI_DXE_SERVICES_TABLE_SIGNATURE ((u64)0x565245535f455844ULL) 468 469 #define EFI_2_30_SYSTEM_TABLE_REVISION ((2 << 16) | (30)) 470 #define EFI_2_20_SYSTEM_TABLE_REVISION ((2 << 16) | (20)) 471 #define EFI_2_10_SYSTEM_TABLE_REVISION ((2 << 16) | (10)) 472 #define EFI_2_00_SYSTEM_TABLE_REVISION ((2 << 16) | (00)) 473 #define EFI_1_10_SYSTEM_TABLE_REVISION ((1 << 16) | (10)) 474 #define EFI_1_02_SYSTEM_TABLE_REVISION ((1 << 16) | (02)) 475 476 typedef struct { 477 efi_table_hdr_t hdr; 478 u64 fw_vendor; /* physical addr of CHAR16 vendor string */ 479 u32 fw_revision; 480 u32 __pad1; 481 u64 con_in_handle; 482 u64 con_in; 483 u64 con_out_handle; 484 u64 con_out; 485 u64 stderr_handle; 486 u64 stderr; 487 u64 runtime; 488 u64 boottime; 489 u32 nr_tables; 490 u32 __pad2; 491 u64 tables; 492 } efi_system_table_64_t; 493 494 typedef struct { 495 efi_table_hdr_t hdr; 496 u32 fw_vendor; /* physical addr of CHAR16 vendor string */ 497 u32 fw_revision; 498 u32 con_in_handle; 499 u32 con_in; 500 u32 con_out_handle; 501 u32 con_out; 502 u32 stderr_handle; 503 u32 stderr; 504 u32 runtime; 505 u32 boottime; 506 u32 nr_tables; 507 u32 tables; 508 } efi_system_table_32_t; 509 510 typedef union efi_simple_text_input_protocol efi_simple_text_input_protocol_t; 511 typedef union efi_simple_text_output_protocol efi_simple_text_output_protocol_t; 512 513 typedef union { 514 struct { 515 efi_table_hdr_t hdr; 516 unsigned long fw_vendor; /* physical addr of CHAR16 vendor string */ 517 u32 fw_revision; 518 unsigned long con_in_handle; 519 efi_simple_text_input_protocol_t *con_in; 520 unsigned long con_out_handle; 521 efi_simple_text_output_protocol_t *con_out; 522 unsigned long stderr_handle; 523 unsigned long stderr; 524 efi_runtime_services_t *runtime; 525 efi_boot_services_t *boottime; 526 unsigned long nr_tables; 527 unsigned long tables; 528 }; 529 efi_system_table_32_t mixed_mode; 530 } efi_system_table_t; 531 532 struct efi_boot_memmap { 533 unsigned long map_size; 534 unsigned long desc_size; 535 u32 desc_ver; 536 unsigned long map_key; 537 unsigned long buff_size; 538 efi_memory_desc_t map[]; 539 }; 540 541 struct efi_unaccepted_memory { 542 u32 version; 543 u32 unit_size; 544 u64 phys_base; 545 u64 size; 546 unsigned long bitmap[]; 547 }; 548 549 /* 550 * Architecture independent structure for describing a memory map for the 551 * benefit of efi_memmap_init_early(), and for passing context between 552 * efi_memmap_alloc() and efi_memmap_install(). 553 */ 554 struct efi_memory_map_data { 555 phys_addr_t phys_map; 556 unsigned long size; 557 unsigned long desc_version; 558 unsigned long desc_size; 559 unsigned long flags; 560 }; 561 562 struct efi_memory_map { 563 phys_addr_t phys_map; 564 void *map; 565 void *map_end; 566 int nr_map; 567 unsigned long desc_version; 568 unsigned long desc_size; 569 #define EFI_MEMMAP_LATE (1UL << 0) 570 #define EFI_MEMMAP_MEMBLOCK (1UL << 1) 571 #define EFI_MEMMAP_SLAB (1UL << 2) 572 unsigned long flags; 573 }; 574 575 struct efi_mem_range { 576 struct range range; 577 u64 attribute; 578 }; 579 580 typedef struct { 581 u32 version; 582 u32 length; 583 u64 memory_protection_attribute; 584 } efi_properties_table_t; 585 586 #define EFI_PROPERTIES_TABLE_VERSION 0x00010000 587 #define EFI_PROPERTIES_RUNTIME_MEMORY_PROTECTION_NON_EXECUTABLE_PE_DATA 0x1 588 589 typedef struct { 590 u16 version; 591 u16 length; 592 u32 runtime_services_supported; 593 } efi_rt_properties_table_t; 594 595 #define EFI_RT_PROPERTIES_TABLE_VERSION 0x1 596 597 #define EFI_INVALID_TABLE_ADDR (~0UL) 598 599 // BIT0 implies that Runtime code includes the forward control flow guard 600 // instruction, such as X86 CET-IBT or ARM BTI. 601 #define EFI_MEMORY_ATTRIBUTES_FLAGS_RT_FORWARD_CONTROL_FLOW_GUARD 0x1 602 603 typedef struct { 604 u32 version; 605 u32 num_entries; 606 u32 desc_size; 607 u32 flags; 608 efi_memory_desc_t entry[0]; 609 } efi_memory_attributes_table_t; 610 611 typedef struct { 612 efi_guid_t signature_owner; 613 u8 signature_data[]; 614 } efi_signature_data_t; 615 616 typedef struct { 617 efi_guid_t signature_type; 618 u32 signature_list_size; 619 u32 signature_header_size; 620 u32 signature_size; 621 u8 signature_header[]; 622 /* efi_signature_data_t signatures[][] */ 623 } efi_signature_list_t; 624 625 typedef u8 efi_sha256_hash_t[32]; 626 627 typedef struct { 628 efi_sha256_hash_t to_be_signed_hash; 629 efi_time_t time_of_revocation; 630 } efi_cert_x509_sha256_t; 631 632 extern unsigned long __ro_after_init efi_rng_seed; /* RNG Seed table */ 633 634 /* 635 * All runtime access to EFI goes through this structure: 636 */ 637 extern struct efi { 638 const efi_runtime_services_t *runtime; /* EFI runtime services table */ 639 unsigned int runtime_version; /* Runtime services version */ 640 unsigned int runtime_supported_mask; 641 642 unsigned long acpi; /* ACPI table (IA64 ext 0.71) */ 643 unsigned long acpi20; /* ACPI table (ACPI 2.0) */ 644 unsigned long smbios; /* SMBIOS table (32 bit entry point) */ 645 unsigned long smbios3; /* SMBIOS table (64 bit entry point) */ 646 unsigned long esrt; /* ESRT table */ 647 unsigned long tpm_log; /* TPM2 Event Log table */ 648 unsigned long tpm_final_log; /* TPM2 Final Events Log table */ 649 unsigned long mokvar_table; /* MOK variable config table */ 650 unsigned long coco_secret; /* Confidential computing secret table */ 651 unsigned long unaccepted; /* Unaccepted memory table */ 652 653 efi_get_time_t *get_time; 654 efi_set_time_t *set_time; 655 efi_get_wakeup_time_t *get_wakeup_time; 656 efi_set_wakeup_time_t *set_wakeup_time; 657 efi_get_variable_t *get_variable; 658 efi_get_next_variable_t *get_next_variable; 659 efi_set_variable_t *set_variable; 660 efi_set_variable_t *set_variable_nonblocking; 661 efi_query_variable_info_t *query_variable_info; 662 efi_query_variable_info_t *query_variable_info_nonblocking; 663 efi_update_capsule_t *update_capsule; 664 efi_query_capsule_caps_t *query_capsule_caps; 665 efi_get_next_high_mono_count_t *get_next_high_mono_count; 666 efi_reset_system_t *reset_system; 667 668 struct efi_memory_map memmap; 669 unsigned long flags; 670 } efi; 671 672 #define EFI_RT_SUPPORTED_GET_TIME 0x0001 673 #define EFI_RT_SUPPORTED_SET_TIME 0x0002 674 #define EFI_RT_SUPPORTED_GET_WAKEUP_TIME 0x0004 675 #define EFI_RT_SUPPORTED_SET_WAKEUP_TIME 0x0008 676 #define EFI_RT_SUPPORTED_GET_VARIABLE 0x0010 677 #define EFI_RT_SUPPORTED_GET_NEXT_VARIABLE_NAME 0x0020 678 #define EFI_RT_SUPPORTED_SET_VARIABLE 0x0040 679 #define EFI_RT_SUPPORTED_SET_VIRTUAL_ADDRESS_MAP 0x0080 680 #define EFI_RT_SUPPORTED_CONVERT_POINTER 0x0100 681 #define EFI_RT_SUPPORTED_GET_NEXT_HIGH_MONOTONIC_COUNT 0x0200 682 #define EFI_RT_SUPPORTED_RESET_SYSTEM 0x0400 683 #define EFI_RT_SUPPORTED_UPDATE_CAPSULE 0x0800 684 #define EFI_RT_SUPPORTED_QUERY_CAPSULE_CAPABILITIES 0x1000 685 #define EFI_RT_SUPPORTED_QUERY_VARIABLE_INFO 0x2000 686 687 #define EFI_RT_SUPPORTED_ALL 0x3fff 688 689 #define EFI_RT_SUPPORTED_TIME_SERVICES 0x0003 690 #define EFI_RT_SUPPORTED_WAKEUP_SERVICES 0x000c 691 #define EFI_RT_SUPPORTED_VARIABLE_SERVICES 0x0070 692 693 extern struct mm_struct efi_mm; 694 695 static inline bool mm_is_efi(struct mm_struct *mm) 696 { 697 return IS_ENABLED(CONFIG_EFI) && mm == &efi_mm; 698 } 699 700 static inline int 701 efi_guidcmp (efi_guid_t left, efi_guid_t right) 702 { 703 return memcmp(&left, &right, sizeof (efi_guid_t)); 704 } 705 706 static inline char * 707 efi_guid_to_str(efi_guid_t *guid, char *out) 708 { 709 sprintf(out, "%pUl", guid->b); 710 return out; 711 } 712 713 extern void efi_init (void); 714 extern void efi_earlycon_reprobe(void); 715 #ifdef CONFIG_EFI 716 extern void efi_enter_virtual_mode (void); /* switch EFI to virtual mode, if possible */ 717 #else 718 static inline void efi_enter_virtual_mode (void) {} 719 #endif 720 #ifdef CONFIG_X86 721 extern efi_status_t efi_query_variable_store(u32 attributes, 722 unsigned long size, 723 bool nonblocking); 724 #else 725 726 static inline efi_status_t efi_query_variable_store(u32 attributes, 727 unsigned long size, 728 bool nonblocking) 729 { 730 return EFI_SUCCESS; 731 } 732 #endif 733 734 extern int __init __efi_memmap_init(struct efi_memory_map_data *data); 735 extern int __init efi_memmap_init_early(struct efi_memory_map_data *data); 736 extern int __init efi_memmap_init_late(phys_addr_t addr, unsigned long size); 737 extern void __init efi_memmap_unmap(void); 738 739 #ifdef CONFIG_EFI_ESRT 740 extern void __init efi_esrt_init(void); 741 #else 742 static inline void efi_esrt_init(void) { } 743 #endif 744 extern int efi_config_parse_tables(const efi_config_table_t *config_tables, 745 int count, 746 const efi_config_table_type_t *arch_tables); 747 extern int efi_systab_check_header(const efi_table_hdr_t *systab_hdr); 748 extern void efi_systab_report_header(const efi_table_hdr_t *systab_hdr, 749 unsigned long fw_vendor); 750 extern u64 efi_get_iobase (void); 751 extern int efi_mem_type(unsigned long phys_addr); 752 extern u64 efi_mem_attributes (unsigned long phys_addr); 753 extern u64 efi_mem_attribute (unsigned long phys_addr, unsigned long size); 754 extern int __init efi_uart_console_only (void); 755 extern u64 efi_mem_desc_end(efi_memory_desc_t *md); 756 extern int efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md); 757 extern int __efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md); 758 extern void efi_mem_reserve(phys_addr_t addr, u64 size); 759 extern int efi_mem_reserve_persistent(phys_addr_t addr, u64 size); 760 extern void efi_initialize_iomem_resources(struct resource *code_resource, 761 struct resource *data_resource, struct resource *bss_resource); 762 extern u64 efi_get_fdt_params(struct efi_memory_map_data *data); 763 extern struct kobject *efi_kobj; 764 765 extern int efi_reboot_quirk_mode; 766 extern bool efi_poweroff_required(void); 767 768 extern unsigned long efi_mem_attr_table; 769 770 /* 771 * efi_memattr_perm_setter - arch specific callback function passed into 772 * efi_memattr_apply_permissions() that updates the 773 * mapping permissions described by the second 774 * argument in the page tables referred to by the 775 * first argument. 776 */ 777 typedef int (*efi_memattr_perm_setter)(struct mm_struct *, efi_memory_desc_t *, bool); 778 779 extern int efi_memattr_init(void); 780 extern int efi_memattr_apply_permissions(struct mm_struct *mm, 781 efi_memattr_perm_setter fn); 782 783 /* 784 * efi_early_memdesc_ptr - get the n-th EFI memmap descriptor 785 * @map: the start of efi memmap 786 * @desc_size: the size of space for each EFI memmap descriptor 787 * @n: the index of efi memmap descriptor 788 * 789 * EFI boot service provides the GetMemoryMap() function to get a copy of the 790 * current memory map which is an array of memory descriptors, each of 791 * which describes a contiguous block of memory. It also gets the size of the 792 * map, and the size of each descriptor, etc. 793 * 794 * Note that per section 6.2 of UEFI Spec 2.6 Errata A, the returned size of 795 * each descriptor might not be equal to sizeof(efi_memory_memdesc_t), 796 * since efi_memory_memdesc_t may be extended in the future. Thus the OS 797 * MUST use the returned size of the descriptor to find the start of each 798 * efi_memory_memdesc_t in the memory map array. This should only be used 799 * during bootup since for_each_efi_memory_desc_xxx() is available after the 800 * kernel initializes the EFI subsystem to set up struct efi_memory_map. 801 */ 802 #define efi_early_memdesc_ptr(map, desc_size, n) \ 803 (efi_memory_desc_t *)((void *)(map) + ((n) * (desc_size))) 804 805 /* Iterate through an efi_memory_map */ 806 #define for_each_efi_memory_desc_in_map(m, md) \ 807 for ((md) = (m)->map; \ 808 (md) && ((void *)(md) + (m)->desc_size) <= (m)->map_end; \ 809 (md) = (void *)(md) + (m)->desc_size) 810 811 /** 812 * for_each_efi_memory_desc - iterate over descriptors in efi.memmap 813 * @md: the efi_memory_desc_t * iterator 814 * 815 * Once the loop finishes @md must not be accessed. 816 */ 817 #define for_each_efi_memory_desc(md) \ 818 for_each_efi_memory_desc_in_map(&efi.memmap, md) 819 820 /* 821 * Format an EFI memory descriptor's type and attributes to a user-provided 822 * character buffer, as per snprintf(), and return the buffer. 823 */ 824 char * __init efi_md_typeattr_format(char *buf, size_t size, 825 const efi_memory_desc_t *md); 826 827 828 typedef void (*efi_element_handler_t)(const char *source, 829 const void *element_data, 830 size_t element_size); 831 extern int __init parse_efi_signature_list( 832 const char *source, 833 const void *data, size_t size, 834 efi_element_handler_t (*get_handler_for_guid)(const efi_guid_t *)); 835 836 /** 837 * efi_range_is_wc - check the WC bit on an address range 838 * @start: starting kvirt address 839 * @len: length of range 840 * 841 * Consult the EFI memory map and make sure it's ok to set this range WC. 842 * Returns true or false. 843 */ 844 static inline int efi_range_is_wc(unsigned long start, unsigned long len) 845 { 846 unsigned long i; 847 848 for (i = 0; i < len; i += (1UL << EFI_PAGE_SHIFT)) { 849 unsigned long paddr = __pa(start + i); 850 if (!(efi_mem_attributes(paddr) & EFI_MEMORY_WC)) 851 return 0; 852 } 853 /* The range checked out */ 854 return 1; 855 } 856 857 /* 858 * We play games with efi_enabled so that the compiler will, if 859 * possible, remove EFI-related code altogether. 860 */ 861 #define EFI_BOOT 0 /* Were we booted from EFI? */ 862 #define EFI_CONFIG_TABLES 2 /* Can we use EFI config tables? */ 863 #define EFI_RUNTIME_SERVICES 3 /* Can we use runtime services? */ 864 #define EFI_MEMMAP 4 /* Can we use EFI memory map? */ 865 #define EFI_64BIT 5 /* Is the firmware 64-bit? */ 866 #define EFI_PARAVIRT 6 /* Access is via a paravirt interface */ 867 #define EFI_ARCH_1 7 /* First arch-specific bit */ 868 #define EFI_DBG 8 /* Print additional debug info at runtime */ 869 #define EFI_NX_PE_DATA 9 /* Can runtime data regions be mapped non-executable? */ 870 #define EFI_MEM_ATTR 10 /* Did firmware publish an EFI_MEMORY_ATTRIBUTES table? */ 871 #define EFI_MEM_NO_SOFT_RESERVE 11 /* Is the kernel configured to ignore soft reservations? */ 872 #define EFI_PRESERVE_BS_REGIONS 12 /* Are EFI boot-services memory segments available? */ 873 874 #ifdef CONFIG_EFI 875 /* 876 * Test whether the above EFI_* bits are enabled. 877 */ 878 static inline bool efi_enabled(int feature) 879 { 880 return test_bit(feature, &efi.flags) != 0; 881 } 882 extern void efi_reboot(enum reboot_mode reboot_mode, const char *__unused); 883 884 bool __pure __efi_soft_reserve_enabled(void); 885 886 static inline bool __pure efi_soft_reserve_enabled(void) 887 { 888 return IS_ENABLED(CONFIG_EFI_SOFT_RESERVE) 889 && __efi_soft_reserve_enabled(); 890 } 891 892 static inline bool efi_rt_services_supported(unsigned int mask) 893 { 894 return (efi.runtime_supported_mask & mask) == mask; 895 } 896 extern void efi_find_mirror(void); 897 #else 898 static inline bool efi_enabled(int feature) 899 { 900 return false; 901 } 902 static inline void 903 efi_reboot(enum reboot_mode reboot_mode, const char *__unused) {} 904 905 static inline bool efi_soft_reserve_enabled(void) 906 { 907 return false; 908 } 909 910 static inline bool efi_rt_services_supported(unsigned int mask) 911 { 912 return false; 913 } 914 915 static inline void efi_find_mirror(void) {} 916 #endif 917 918 extern int efi_status_to_err(efi_status_t status); 919 920 /* 921 * Variable Attributes 922 */ 923 #define EFI_VARIABLE_NON_VOLATILE 0x0000000000000001 924 #define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002 925 #define EFI_VARIABLE_RUNTIME_ACCESS 0x0000000000000004 926 #define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008 927 #define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010 928 #define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020 929 #define EFI_VARIABLE_APPEND_WRITE 0x0000000000000040 930 931 #define EFI_VARIABLE_MASK (EFI_VARIABLE_NON_VOLATILE | \ 932 EFI_VARIABLE_BOOTSERVICE_ACCESS | \ 933 EFI_VARIABLE_RUNTIME_ACCESS | \ 934 EFI_VARIABLE_HARDWARE_ERROR_RECORD | \ 935 EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \ 936 EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \ 937 EFI_VARIABLE_APPEND_WRITE) 938 /* 939 * Length of a GUID string (strlen("aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee")) 940 * not including trailing NUL 941 */ 942 #define EFI_VARIABLE_GUID_LEN UUID_STRING_LEN 943 944 /* 945 * EFI Device Path information 946 */ 947 #define EFI_DEV_HW 0x01 948 #define EFI_DEV_PCI 1 949 #define EFI_DEV_PCCARD 2 950 #define EFI_DEV_MEM_MAPPED 3 951 #define EFI_DEV_VENDOR 4 952 #define EFI_DEV_CONTROLLER 5 953 #define EFI_DEV_ACPI 0x02 954 #define EFI_DEV_BASIC_ACPI 1 955 #define EFI_DEV_EXPANDED_ACPI 2 956 #define EFI_DEV_MSG 0x03 957 #define EFI_DEV_MSG_ATAPI 1 958 #define EFI_DEV_MSG_SCSI 2 959 #define EFI_DEV_MSG_FC 3 960 #define EFI_DEV_MSG_1394 4 961 #define EFI_DEV_MSG_USB 5 962 #define EFI_DEV_MSG_USB_CLASS 15 963 #define EFI_DEV_MSG_I20 6 964 #define EFI_DEV_MSG_MAC 11 965 #define EFI_DEV_MSG_IPV4 12 966 #define EFI_DEV_MSG_IPV6 13 967 #define EFI_DEV_MSG_INFINIBAND 9 968 #define EFI_DEV_MSG_UART 14 969 #define EFI_DEV_MSG_VENDOR 10 970 #define EFI_DEV_MEDIA 0x04 971 #define EFI_DEV_MEDIA_HARD_DRIVE 1 972 #define EFI_DEV_MEDIA_CDROM 2 973 #define EFI_DEV_MEDIA_VENDOR 3 974 #define EFI_DEV_MEDIA_FILE 4 975 #define EFI_DEV_MEDIA_PROTOCOL 5 976 #define EFI_DEV_MEDIA_REL_OFFSET 8 977 #define EFI_DEV_BIOS_BOOT 0x05 978 #define EFI_DEV_END_PATH 0x7F 979 #define EFI_DEV_END_PATH2 0xFF 980 #define EFI_DEV_END_INSTANCE 0x01 981 #define EFI_DEV_END_ENTIRE 0xFF 982 983 struct efi_generic_dev_path { 984 u8 type; 985 u8 sub_type; 986 u16 length; 987 } __packed; 988 989 struct efi_acpi_dev_path { 990 struct efi_generic_dev_path header; 991 u32 hid; 992 u32 uid; 993 } __packed; 994 995 struct efi_pci_dev_path { 996 struct efi_generic_dev_path header; 997 u8 fn; 998 u8 dev; 999 } __packed; 1000 1001 struct efi_vendor_dev_path { 1002 struct efi_generic_dev_path header; 1003 efi_guid_t vendorguid; 1004 u8 vendordata[]; 1005 } __packed; 1006 1007 struct efi_rel_offset_dev_path { 1008 struct efi_generic_dev_path header; 1009 u32 reserved; 1010 u64 starting_offset; 1011 u64 ending_offset; 1012 } __packed; 1013 1014 struct efi_mem_mapped_dev_path { 1015 struct efi_generic_dev_path header; 1016 u32 memory_type; 1017 u64 starting_addr; 1018 u64 ending_addr; 1019 } __packed; 1020 1021 struct efi_file_path_dev_path { 1022 struct efi_generic_dev_path header; 1023 efi_char16_t filename[]; 1024 } __packed; 1025 1026 struct efi_dev_path { 1027 union { 1028 struct efi_generic_dev_path header; 1029 struct efi_acpi_dev_path acpi; 1030 struct efi_pci_dev_path pci; 1031 struct efi_vendor_dev_path vendor; 1032 struct efi_rel_offset_dev_path rel_offset; 1033 }; 1034 } __packed; 1035 1036 struct device *efi_get_device_by_path(const struct efi_dev_path **node, 1037 size_t *len); 1038 1039 static inline void memrange_efi_to_native(u64 *addr, u64 *npages) 1040 { 1041 *npages = PFN_UP(*addr + (*npages<<EFI_PAGE_SHIFT)) - PFN_DOWN(*addr); 1042 *addr &= PAGE_MASK; 1043 } 1044 1045 /* 1046 * EFI Variable support. 1047 * 1048 * Different firmware drivers can expose their EFI-like variables using 1049 * the following. 1050 */ 1051 1052 struct efivar_operations { 1053 efi_get_variable_t *get_variable; 1054 efi_get_next_variable_t *get_next_variable; 1055 efi_set_variable_t *set_variable; 1056 efi_set_variable_t *set_variable_nonblocking; 1057 efi_query_variable_store_t *query_variable_store; 1058 efi_query_variable_info_t *query_variable_info; 1059 }; 1060 1061 struct efivars { 1062 struct kset *kset; 1063 const struct efivar_operations *ops; 1064 }; 1065 1066 #ifdef CONFIG_X86 1067 u64 __attribute_const__ efivar_reserved_space(void); 1068 #else 1069 static inline u64 efivar_reserved_space(void) { return 0; } 1070 #endif 1071 1072 /* 1073 * The maximum size of VariableName + Data = 1024 1074 * Therefore, it's reasonable to save that much 1075 * space in each part of the structure, 1076 * and we use a page for reading/writing. 1077 */ 1078 1079 #define EFI_VAR_NAME_LEN 1024 1080 1081 int efivars_register(struct efivars *efivars, 1082 const struct efivar_operations *ops); 1083 int efivars_unregister(struct efivars *efivars); 1084 1085 #ifdef CONFIG_EFI 1086 bool efivar_is_available(void); 1087 #else 1088 static inline bool efivar_is_available(void) { return false; } 1089 #endif 1090 1091 bool efivar_supports_writes(void); 1092 1093 int efivar_lock(void); 1094 int efivar_trylock(void); 1095 void efivar_unlock(void); 1096 1097 efi_status_t efivar_get_variable(efi_char16_t *name, efi_guid_t *vendor, 1098 u32 *attr, unsigned long *size, void *data); 1099 1100 efi_status_t efivar_get_next_variable(unsigned long *name_size, 1101 efi_char16_t *name, efi_guid_t *vendor); 1102 1103 efi_status_t efivar_set_variable_locked(efi_char16_t *name, efi_guid_t *vendor, 1104 u32 attr, unsigned long data_size, 1105 void *data, bool nonblocking); 1106 1107 efi_status_t efivar_set_variable(efi_char16_t *name, efi_guid_t *vendor, 1108 u32 attr, unsigned long data_size, void *data); 1109 1110 efi_status_t efivar_query_variable_info(u32 attr, u64 *storage_space, 1111 u64 *remaining_space, 1112 u64 *max_variable_size); 1113 1114 #if IS_ENABLED(CONFIG_EFI_CAPSULE_LOADER) 1115 extern bool efi_capsule_pending(int *reset_type); 1116 1117 extern int efi_capsule_supported(efi_guid_t guid, u32 flags, 1118 size_t size, int *reset); 1119 1120 extern int efi_capsule_update(efi_capsule_header_t *capsule, 1121 phys_addr_t *pages); 1122 #else 1123 static inline bool efi_capsule_pending(int *reset_type) { return false; } 1124 #endif 1125 1126 #ifdef CONFIG_EFI 1127 extern bool efi_runtime_disabled(void); 1128 #else 1129 static inline bool efi_runtime_disabled(void) { return true; } 1130 #endif 1131 1132 extern void efi_call_virt_check_flags(unsigned long flags, const void *caller); 1133 extern unsigned long efi_call_virt_save_flags(void); 1134 1135 enum efi_secureboot_mode { 1136 efi_secureboot_mode_unset, 1137 efi_secureboot_mode_unknown, 1138 efi_secureboot_mode_disabled, 1139 efi_secureboot_mode_enabled, 1140 }; 1141 1142 static inline 1143 enum efi_secureboot_mode efi_get_secureboot_mode(efi_get_variable_t *get_var) 1144 { 1145 u8 secboot, setupmode = 0; 1146 efi_status_t status; 1147 unsigned long size; 1148 1149 size = sizeof(secboot); 1150 status = get_var(L"SecureBoot", &EFI_GLOBAL_VARIABLE_GUID, NULL, &size, 1151 &secboot); 1152 if (status == EFI_NOT_FOUND) 1153 return efi_secureboot_mode_disabled; 1154 if (status != EFI_SUCCESS) 1155 return efi_secureboot_mode_unknown; 1156 1157 size = sizeof(setupmode); 1158 get_var(L"SetupMode", &EFI_GLOBAL_VARIABLE_GUID, NULL, &size, &setupmode); 1159 if (secboot == 0 || setupmode == 1) 1160 return efi_secureboot_mode_disabled; 1161 return efi_secureboot_mode_enabled; 1162 } 1163 1164 #ifdef CONFIG_EFI_EMBEDDED_FIRMWARE 1165 void efi_check_for_embedded_firmwares(void); 1166 #else 1167 static inline void efi_check_for_embedded_firmwares(void) { } 1168 #endif 1169 1170 #define arch_efi_call_virt(p, f, args...) ((p)->f(args)) 1171 1172 /* 1173 * Arch code must implement the following three routines: 1174 * 1175 * * arch_efi_call_virt_setup() 1176 * 1177 * Sets up the environment for the call (e.g. switching page tables, 1178 * allowing kernel-mode use of floating point, if required). 1179 * 1180 * * arch_efi_call_virt() 1181 * 1182 * Performs the call. This routine takes a variable number of arguments so 1183 * it must be implemented as a variadic preprocessor macro. 1184 * 1185 * * arch_efi_call_virt_teardown() 1186 * 1187 * Restores the usual kernel environment once the call has returned. 1188 */ 1189 1190 #define efi_call_virt_pointer(p, f, args...) \ 1191 ({ \ 1192 typeof((p)->f(args)) __s; \ 1193 unsigned long __flags; \ 1194 \ 1195 arch_efi_call_virt_setup(); \ 1196 \ 1197 __flags = efi_call_virt_save_flags(); \ 1198 __s = arch_efi_call_virt(p, f, args); \ 1199 efi_call_virt_check_flags(__flags, NULL); \ 1200 \ 1201 arch_efi_call_virt_teardown(); \ 1202 \ 1203 __s; \ 1204 }) 1205 1206 #define EFI_RANDOM_SEED_SIZE 32U // BLAKE2S_HASH_SIZE 1207 1208 struct linux_efi_random_seed { 1209 u32 size; 1210 u8 bits[]; 1211 }; 1212 1213 struct linux_efi_tpm_eventlog { 1214 u32 size; 1215 u32 final_events_preboot_size; 1216 u8 version; 1217 u8 log[]; 1218 }; 1219 1220 extern int efi_tpm_eventlog_init(void); 1221 1222 struct efi_tcg2_final_events_table { 1223 u64 version; 1224 u64 nr_events; 1225 u8 events[]; 1226 }; 1227 extern int efi_tpm_final_log_size; 1228 1229 extern unsigned long rci2_table_phys; 1230 1231 efi_status_t 1232 efi_call_acpi_prm_handler(efi_status_t (__efiapi *handler_addr)(u64, void *), 1233 u64 param_buffer_addr, void *context); 1234 1235 /* 1236 * efi_runtime_service() function identifiers. 1237 * "NONE" is used by efi_recover_from_page_fault() to check if the page 1238 * fault happened while executing an efi runtime service. 1239 */ 1240 enum efi_rts_ids { 1241 EFI_NONE, 1242 EFI_GET_TIME, 1243 EFI_SET_TIME, 1244 EFI_GET_WAKEUP_TIME, 1245 EFI_SET_WAKEUP_TIME, 1246 EFI_GET_VARIABLE, 1247 EFI_GET_NEXT_VARIABLE, 1248 EFI_SET_VARIABLE, 1249 EFI_QUERY_VARIABLE_INFO, 1250 EFI_GET_NEXT_HIGH_MONO_COUNT, 1251 EFI_RESET_SYSTEM, 1252 EFI_UPDATE_CAPSULE, 1253 EFI_QUERY_CAPSULE_CAPS, 1254 EFI_ACPI_PRM_HANDLER, 1255 }; 1256 1257 union efi_rts_args; 1258 1259 /* 1260 * efi_runtime_work: Details of EFI Runtime Service work 1261 * @args: Pointer to union describing the arguments 1262 * @status: Status of executing EFI Runtime Service 1263 * @efi_rts_id: EFI Runtime Service function identifier 1264 * @efi_rts_comp: Struct used for handling completions 1265 * @caller: The caller of the runtime service 1266 */ 1267 struct efi_runtime_work { 1268 union efi_rts_args *args; 1269 efi_status_t status; 1270 struct work_struct work; 1271 enum efi_rts_ids efi_rts_id; 1272 struct completion efi_rts_comp; 1273 const void *caller; 1274 }; 1275 1276 extern struct efi_runtime_work efi_rts_work; 1277 1278 /* Workqueue to queue EFI Runtime Services */ 1279 extern struct workqueue_struct *efi_rts_wq; 1280 1281 struct linux_efi_memreserve { 1282 int size; // allocated size of the array 1283 atomic_t count; // number of entries used 1284 phys_addr_t next; // pa of next struct instance 1285 struct { 1286 phys_addr_t base; 1287 phys_addr_t size; 1288 } entry[]; 1289 }; 1290 1291 #define EFI_MEMRESERVE_COUNT(size) (((size) - sizeof(struct linux_efi_memreserve)) \ 1292 / sizeof_field(struct linux_efi_memreserve, entry[0])) 1293 1294 void __init efi_arch_mem_reserve(phys_addr_t addr, u64 size); 1295 1296 char *efi_systab_show_arch(char *str); 1297 1298 /* 1299 * The LINUX_EFI_MOK_VARIABLE_TABLE_GUID config table can be provided 1300 * to the kernel by an EFI boot loader. The table contains a packed 1301 * sequence of these entries, one for each named MOK variable. 1302 * The sequence is terminated by an entry with a completely NULL 1303 * name and 0 data size. 1304 */ 1305 struct efi_mokvar_table_entry { 1306 char name[256]; 1307 u64 data_size; 1308 u8 data[]; 1309 } __attribute((packed)); 1310 1311 #ifdef CONFIG_LOAD_UEFI_KEYS 1312 extern void __init efi_mokvar_table_init(void); 1313 extern struct efi_mokvar_table_entry *efi_mokvar_entry_next( 1314 struct efi_mokvar_table_entry **mokvar_entry); 1315 extern struct efi_mokvar_table_entry *efi_mokvar_entry_find(const char *name); 1316 #else 1317 static inline void efi_mokvar_table_init(void) { } 1318 static inline struct efi_mokvar_table_entry *efi_mokvar_entry_next( 1319 struct efi_mokvar_table_entry **mokvar_entry) 1320 { 1321 return NULL; 1322 } 1323 static inline struct efi_mokvar_table_entry *efi_mokvar_entry_find( 1324 const char *name) 1325 { 1326 return NULL; 1327 } 1328 #endif 1329 1330 extern void efifb_setup_from_dmi(struct screen_info *si, const char *opt); 1331 1332 struct linux_efi_coco_secret_area { 1333 u64 base_pa; 1334 u64 size; 1335 }; 1336 1337 struct linux_efi_initrd { 1338 unsigned long base; 1339 unsigned long size; 1340 }; 1341 1342 /* Header of a populated EFI secret area */ 1343 #define EFI_SECRET_TABLE_HEADER_GUID EFI_GUID(0x1e74f542, 0x71dd, 0x4d66, 0x96, 0x3e, 0xef, 0x42, 0x87, 0xff, 0x17, 0x3b) 1344 1345 bool xen_efi_config_table_is_usable(const efi_guid_t *guid, unsigned long table); 1346 1347 static inline 1348 bool efi_config_table_is_usable(const efi_guid_t *guid, unsigned long table) 1349 { 1350 if (!IS_ENABLED(CONFIG_XEN_EFI)) 1351 return true; 1352 return xen_efi_config_table_is_usable(guid, table); 1353 } 1354 1355 umode_t efi_attr_is_visible(struct kobject *kobj, struct attribute *attr, int n); 1356 1357 /* 1358 * efivar ops event type 1359 */ 1360 #define EFIVAR_OPS_RDONLY 0 1361 #define EFIVAR_OPS_RDWR 1 1362 1363 extern struct blocking_notifier_head efivar_ops_nh; 1364 1365 void efivars_generic_ops_register(void); 1366 void efivars_generic_ops_unregister(void); 1367 1368 #endif /* _LINUX_EFI_H */ 1369