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 #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 #if defined(CONFIG_X86_64) 52 #define __efiapi __attribute__((ms_abi)) 53 #elif defined(CONFIG_X86_32) 54 #define __efiapi __attribute__((regparm(0))) 55 #else 56 #define __efiapi 57 #endif 58 59 /* 60 * The UEFI spec and EDK2 reference implementation both define EFI_GUID as 61 * struct { u32 a; u16; b; u16 c; u8 d[8]; }; and so the implied alignment 62 * is 32 bits not 8 bits like our guid_t. In some cases (i.e., on 32-bit ARM), 63 * this means that firmware services invoked by the kernel may assume that 64 * efi_guid_t* arguments are 32-bit aligned, and use memory accessors that 65 * do not tolerate misalignment. So let's set the minimum alignment to 32 bits. 66 * 67 * Note that the UEFI spec as well as some comments in the EDK2 code base 68 * suggest that EFI_GUID should be 64-bit aligned, but this appears to be 69 * a mistake, given that no code seems to exist that actually enforces that 70 * or relies on it. 71 */ 72 typedef guid_t efi_guid_t __aligned(__alignof__(u32)); 73 74 #define EFI_GUID(a,b,c,d0,d1,d2,d3,d4,d5,d6,d7) \ 75 GUID_INIT(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7) 76 77 /* 78 * Generic EFI table header 79 */ 80 typedef struct { 81 u64 signature; 82 u32 revision; 83 u32 headersize; 84 u32 crc32; 85 u32 reserved; 86 } efi_table_hdr_t; 87 88 /* 89 * Memory map descriptor: 90 */ 91 92 /* Memory types: */ 93 #define EFI_RESERVED_TYPE 0 94 #define EFI_LOADER_CODE 1 95 #define EFI_LOADER_DATA 2 96 #define EFI_BOOT_SERVICES_CODE 3 97 #define EFI_BOOT_SERVICES_DATA 4 98 #define EFI_RUNTIME_SERVICES_CODE 5 99 #define EFI_RUNTIME_SERVICES_DATA 6 100 #define EFI_CONVENTIONAL_MEMORY 7 101 #define EFI_UNUSABLE_MEMORY 8 102 #define EFI_ACPI_RECLAIM_MEMORY 9 103 #define EFI_ACPI_MEMORY_NVS 10 104 #define EFI_MEMORY_MAPPED_IO 11 105 #define EFI_MEMORY_MAPPED_IO_PORT_SPACE 12 106 #define EFI_PAL_CODE 13 107 #define EFI_PERSISTENT_MEMORY 14 108 #define EFI_MAX_MEMORY_TYPE 15 109 110 /* Attribute values: */ 111 #define EFI_MEMORY_UC ((u64)0x0000000000000001ULL) /* uncached */ 112 #define EFI_MEMORY_WC ((u64)0x0000000000000002ULL) /* write-coalescing */ 113 #define EFI_MEMORY_WT ((u64)0x0000000000000004ULL) /* write-through */ 114 #define EFI_MEMORY_WB ((u64)0x0000000000000008ULL) /* write-back */ 115 #define EFI_MEMORY_UCE ((u64)0x0000000000000010ULL) /* uncached, exported */ 116 #define EFI_MEMORY_WP ((u64)0x0000000000001000ULL) /* write-protect */ 117 #define EFI_MEMORY_RP ((u64)0x0000000000002000ULL) /* read-protect */ 118 #define EFI_MEMORY_XP ((u64)0x0000000000004000ULL) /* execute-protect */ 119 #define EFI_MEMORY_NV ((u64)0x0000000000008000ULL) /* non-volatile */ 120 #define EFI_MEMORY_MORE_RELIABLE \ 121 ((u64)0x0000000000010000ULL) /* higher reliability */ 122 #define EFI_MEMORY_RO ((u64)0x0000000000020000ULL) /* read-only */ 123 #define EFI_MEMORY_SP ((u64)0x0000000000040000ULL) /* soft reserved */ 124 #define EFI_MEMORY_RUNTIME ((u64)0x8000000000000000ULL) /* range requires runtime mapping */ 125 #define EFI_MEMORY_DESCRIPTOR_VERSION 1 126 127 #define EFI_PAGE_SHIFT 12 128 #define EFI_PAGE_SIZE (1UL << EFI_PAGE_SHIFT) 129 #define EFI_PAGES_MAX (U64_MAX >> EFI_PAGE_SHIFT) 130 131 typedef struct { 132 u32 type; 133 u32 pad; 134 u64 phys_addr; 135 u64 virt_addr; 136 u64 num_pages; 137 u64 attribute; 138 } efi_memory_desc_t; 139 140 typedef struct { 141 efi_guid_t guid; 142 u32 headersize; 143 u32 flags; 144 u32 imagesize; 145 } efi_capsule_header_t; 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 typedef int (*efi_freemem_callback_t) (u64 start, u64 end, void *arg); 169 170 /* 171 * Types and defines for Time Services 172 */ 173 #define EFI_TIME_ADJUST_DAYLIGHT 0x1 174 #define EFI_TIME_IN_DAYLIGHT 0x2 175 #define EFI_UNSPECIFIED_TIMEZONE 0x07ff 176 177 typedef struct { 178 u16 year; 179 u8 month; 180 u8 day; 181 u8 hour; 182 u8 minute; 183 u8 second; 184 u8 pad1; 185 u32 nanosecond; 186 s16 timezone; 187 u8 daylight; 188 u8 pad2; 189 } efi_time_t; 190 191 typedef struct { 192 u32 resolution; 193 u32 accuracy; 194 u8 sets_to_zero; 195 } efi_time_cap_t; 196 197 typedef union efi_boot_services efi_boot_services_t; 198 199 /* 200 * Types and defines for EFI ResetSystem 201 */ 202 #define EFI_RESET_COLD 0 203 #define EFI_RESET_WARM 1 204 #define EFI_RESET_SHUTDOWN 2 205 206 /* 207 * EFI Runtime Services table 208 */ 209 #define EFI_RUNTIME_SERVICES_SIGNATURE ((u64)0x5652453544e5552ULL) 210 #define EFI_RUNTIME_SERVICES_REVISION 0x00010000 211 212 typedef struct { 213 efi_table_hdr_t hdr; 214 u32 get_time; 215 u32 set_time; 216 u32 get_wakeup_time; 217 u32 set_wakeup_time; 218 u32 set_virtual_address_map; 219 u32 convert_pointer; 220 u32 get_variable; 221 u32 get_next_variable; 222 u32 set_variable; 223 u32 get_next_high_mono_count; 224 u32 reset_system; 225 u32 update_capsule; 226 u32 query_capsule_caps; 227 u32 query_variable_info; 228 } efi_runtime_services_32_t; 229 230 typedef efi_status_t efi_get_time_t (efi_time_t *tm, efi_time_cap_t *tc); 231 typedef efi_status_t efi_set_time_t (efi_time_t *tm); 232 typedef efi_status_t efi_get_wakeup_time_t (efi_bool_t *enabled, efi_bool_t *pending, 233 efi_time_t *tm); 234 typedef efi_status_t efi_set_wakeup_time_t (efi_bool_t enabled, efi_time_t *tm); 235 typedef efi_status_t efi_get_variable_t (efi_char16_t *name, efi_guid_t *vendor, u32 *attr, 236 unsigned long *data_size, void *data); 237 typedef efi_status_t efi_get_next_variable_t (unsigned long *name_size, efi_char16_t *name, 238 efi_guid_t *vendor); 239 typedef efi_status_t efi_set_variable_t (efi_char16_t *name, efi_guid_t *vendor, 240 u32 attr, unsigned long data_size, 241 void *data); 242 typedef efi_status_t efi_get_next_high_mono_count_t (u32 *count); 243 typedef void efi_reset_system_t (int reset_type, efi_status_t status, 244 unsigned long data_size, efi_char16_t *data); 245 typedef efi_status_t efi_set_virtual_address_map_t (unsigned long memory_map_size, 246 unsigned long descriptor_size, 247 u32 descriptor_version, 248 efi_memory_desc_t *virtual_map); 249 typedef efi_status_t efi_query_variable_info_t(u32 attr, 250 u64 *storage_space, 251 u64 *remaining_space, 252 u64 *max_variable_size); 253 typedef efi_status_t efi_update_capsule_t(efi_capsule_header_t **capsules, 254 unsigned long count, 255 unsigned long sg_list); 256 typedef efi_status_t efi_query_capsule_caps_t(efi_capsule_header_t **capsules, 257 unsigned long count, 258 u64 *max_size, 259 int *reset_type); 260 typedef efi_status_t efi_query_variable_store_t(u32 attributes, 261 unsigned long size, 262 bool nonblocking); 263 264 typedef union { 265 struct { 266 efi_table_hdr_t hdr; 267 efi_get_time_t __efiapi *get_time; 268 efi_set_time_t __efiapi *set_time; 269 efi_get_wakeup_time_t __efiapi *get_wakeup_time; 270 efi_set_wakeup_time_t __efiapi *set_wakeup_time; 271 efi_set_virtual_address_map_t __efiapi *set_virtual_address_map; 272 void *convert_pointer; 273 efi_get_variable_t __efiapi *get_variable; 274 efi_get_next_variable_t __efiapi *get_next_variable; 275 efi_set_variable_t __efiapi *set_variable; 276 efi_get_next_high_mono_count_t __efiapi *get_next_high_mono_count; 277 efi_reset_system_t __efiapi *reset_system; 278 efi_update_capsule_t __efiapi *update_capsule; 279 efi_query_capsule_caps_t __efiapi *query_capsule_caps; 280 efi_query_variable_info_t __efiapi *query_variable_info; 281 }; 282 efi_runtime_services_32_t mixed_mode; 283 } efi_runtime_services_t; 284 285 void efi_native_runtime_setup(void); 286 287 /* 288 * EFI Configuration Table and GUID definitions 289 * 290 * These are all defined in a single line to make them easier to 291 * grep for and to see them at a glance - while still having a 292 * similar structure to the definitions in the spec. 293 * 294 * Here's how they are structured: 295 * 296 * GUID: 12345678-1234-1234-1234-123456789012 297 * Spec: 298 * #define EFI_SOME_PROTOCOL_GUID \ 299 * {0x12345678,0x1234,0x1234,\ 300 * {0x12,0x34,0x12,0x34,0x56,0x78,0x90,0x12}} 301 * Here: 302 * #define SOME_PROTOCOL_GUID EFI_GUID(0x12345678, 0x1234, 0x1234, 0x12, 0x34, 0x12, 0x34, 0x56, 0x78, 0x90, 0x12) 303 * ^ tabs ^extra space 304 * 305 * Note that the 'extra space' separates the values at the same place 306 * where the UEFI SPEC breaks the line. 307 */ 308 #define NULL_GUID EFI_GUID(0x00000000, 0x0000, 0x0000, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00) 309 #define MPS_TABLE_GUID EFI_GUID(0xeb9d2d2f, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d) 310 #define ACPI_TABLE_GUID EFI_GUID(0xeb9d2d30, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d) 311 #define ACPI_20_TABLE_GUID EFI_GUID(0x8868e871, 0xe4f1, 0x11d3, 0xbc, 0x22, 0x00, 0x80, 0xc7, 0x3c, 0x88, 0x81) 312 #define SMBIOS_TABLE_GUID EFI_GUID(0xeb9d2d31, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d) 313 #define SMBIOS3_TABLE_GUID EFI_GUID(0xf2fd1544, 0x9794, 0x4a2c, 0x99, 0x2e, 0xe5, 0xbb, 0xcf, 0x20, 0xe3, 0x94) 314 #define SAL_SYSTEM_TABLE_GUID EFI_GUID(0xeb9d2d32, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d) 315 #define HCDP_TABLE_GUID EFI_GUID(0xf951938d, 0x620b, 0x42ef, 0x82, 0x79, 0xa8, 0x4b, 0x79, 0x61, 0x78, 0x98) 316 #define UGA_IO_PROTOCOL_GUID EFI_GUID(0x61a4d49e, 0x6f68, 0x4f1b, 0xb9, 0x22, 0xa8, 0x6e, 0xed, 0x0b, 0x07, 0xa2) 317 #define EFI_GLOBAL_VARIABLE_GUID EFI_GUID(0x8be4df61, 0x93ca, 0x11d2, 0xaa, 0x0d, 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c) 318 #define UV_SYSTEM_TABLE_GUID EFI_GUID(0x3b13a7d4, 0x633e, 0x11dd, 0x93, 0xec, 0xda, 0x25, 0x56, 0xd8, 0x95, 0x93) 319 #define LINUX_EFI_CRASH_GUID EFI_GUID(0xcfc8fc79, 0xbe2e, 0x4ddc, 0x97, 0xf0, 0x9f, 0x98, 0xbf, 0xe2, 0x98, 0xa0) 320 #define LOADED_IMAGE_PROTOCOL_GUID EFI_GUID(0x5b1b31a1, 0x9562, 0x11d2, 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b) 321 #define EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID EFI_GUID(0x9042a9de, 0x23dc, 0x4a38, 0x96, 0xfb, 0x7a, 0xde, 0xd0, 0x80, 0x51, 0x6a) 322 #define EFI_UGA_PROTOCOL_GUID EFI_GUID(0x982c298b, 0xf4fa, 0x41cb, 0xb8, 0x38, 0x77, 0xaa, 0x68, 0x8f, 0xb8, 0x39) 323 #define EFI_PCI_IO_PROTOCOL_GUID EFI_GUID(0x4cf5b200, 0x68b8, 0x4ca5, 0x9e, 0xec, 0xb2, 0x3e, 0x3f, 0x50, 0x02, 0x9a) 324 #define EFI_FILE_INFO_ID EFI_GUID(0x09576e92, 0x6d3f, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b) 325 #define EFI_SYSTEM_RESOURCE_TABLE_GUID EFI_GUID(0xb122a263, 0x3661, 0x4f68, 0x99, 0x29, 0x78, 0xf8, 0xb0, 0xd6, 0x21, 0x80) 326 #define EFI_FILE_SYSTEM_GUID EFI_GUID(0x964e5b22, 0x6459, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b) 327 #define DEVICE_TREE_GUID EFI_GUID(0xb1b621d5, 0xf19c, 0x41a5, 0x83, 0x0b, 0xd9, 0x15, 0x2c, 0x69, 0xaa, 0xe0) 328 #define EFI_PROPERTIES_TABLE_GUID EFI_GUID(0x880aaca3, 0x4adc, 0x4a04, 0x90, 0x79, 0xb7, 0x47, 0x34, 0x08, 0x25, 0xe5) 329 #define EFI_RNG_PROTOCOL_GUID EFI_GUID(0x3152bca5, 0xeade, 0x433d, 0x86, 0x2e, 0xc0, 0x1c, 0xdc, 0x29, 0x1f, 0x44) 330 #define EFI_RNG_ALGORITHM_RAW EFI_GUID(0xe43176d7, 0xb6e8, 0x4827, 0xb7, 0x84, 0x7f, 0xfd, 0xc4, 0xb6, 0x85, 0x61) 331 #define EFI_MEMORY_ATTRIBUTES_TABLE_GUID EFI_GUID(0xdcfa911d, 0x26eb, 0x469f, 0xa2, 0x20, 0x38, 0xb7, 0xdc, 0x46, 0x12, 0x20) 332 #define EFI_CONSOLE_OUT_DEVICE_GUID EFI_GUID(0xd3b36f2c, 0xd551, 0x11d4, 0x9a, 0x46, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d) 333 #define APPLE_PROPERTIES_PROTOCOL_GUID EFI_GUID(0x91bd12fe, 0xf6c3, 0x44fb, 0xa5, 0xb7, 0x51, 0x22, 0xab, 0x30, 0x3a, 0xe0) 334 #define EFI_TCG2_PROTOCOL_GUID EFI_GUID(0x607f766c, 0x7455, 0x42be, 0x93, 0x0b, 0xe4, 0xd7, 0x6d, 0xb2, 0x72, 0x0f) 335 #define EFI_LOAD_FILE_PROTOCOL_GUID EFI_GUID(0x56ec3091, 0x954c, 0x11d2, 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b) 336 #define EFI_LOAD_FILE2_PROTOCOL_GUID EFI_GUID(0x4006c0c1, 0xfcb3, 0x403e, 0x99, 0x6d, 0x4a, 0x6c, 0x87, 0x24, 0xe0, 0x6d) 337 #define EFI_RT_PROPERTIES_TABLE_GUID EFI_GUID(0xeb66918a, 0x7eef, 0x402a, 0x84, 0x2e, 0x93, 0x1d, 0x21, 0xc3, 0x8a, 0xe9) 338 339 #define EFI_IMAGE_SECURITY_DATABASE_GUID EFI_GUID(0xd719b2cb, 0x3d3a, 0x4596, 0xa3, 0xbc, 0xda, 0xd0, 0x0e, 0x67, 0x65, 0x6f) 340 #define EFI_SHIM_LOCK_GUID EFI_GUID(0x605dab50, 0xe046, 0x4300, 0xab, 0xb6, 0x3d, 0xd8, 0x10, 0xdd, 0x8b, 0x23) 341 342 #define EFI_CERT_SHA256_GUID EFI_GUID(0xc1c41626, 0x504c, 0x4092, 0xac, 0xa9, 0x41, 0xf9, 0x36, 0x93, 0x43, 0x28) 343 #define EFI_CERT_X509_GUID EFI_GUID(0xa5c059a1, 0x94e4, 0x4aa7, 0x87, 0xb5, 0xab, 0x15, 0x5c, 0x2b, 0xf0, 0x72) 344 #define EFI_CERT_X509_SHA256_GUID EFI_GUID(0x3bd2a492, 0x96c0, 0x4079, 0xb4, 0x20, 0xfc, 0xf9, 0x8e, 0xf1, 0x03, 0xed) 345 346 /* 347 * This GUID is used to pass to the kernel proper the struct screen_info 348 * structure that was populated by the stub based on the GOP protocol instance 349 * associated with ConOut 350 */ 351 #define LINUX_EFI_ARM_SCREEN_INFO_TABLE_GUID EFI_GUID(0xe03fc20a, 0x85dc, 0x406e, 0xb9, 0x0e, 0x4a, 0xb5, 0x02, 0x37, 0x1d, 0x95) 352 #define LINUX_EFI_LOADER_ENTRY_GUID EFI_GUID(0x4a67b082, 0x0a4c, 0x41cf, 0xb6, 0xc7, 0x44, 0x0b, 0x29, 0xbb, 0x8c, 0x4f) 353 #define LINUX_EFI_RANDOM_SEED_TABLE_GUID EFI_GUID(0x1ce1e5bc, 0x7ceb, 0x42f2, 0x81, 0xe5, 0x8a, 0xad, 0xf1, 0x80, 0xf5, 0x7b) 354 #define LINUX_EFI_TPM_EVENT_LOG_GUID EFI_GUID(0xb7799cb0, 0xeca2, 0x4943, 0x96, 0x67, 0x1f, 0xae, 0x07, 0xb7, 0x47, 0xfa) 355 #define LINUX_EFI_TPM_FINAL_LOG_GUID EFI_GUID(0x1e2ed096, 0x30e2, 0x4254, 0xbd, 0x89, 0x86, 0x3b, 0xbe, 0xf8, 0x23, 0x25) 356 #define LINUX_EFI_MEMRESERVE_TABLE_GUID EFI_GUID(0x888eb0c6, 0x8ede, 0x4ff5, 0xa8, 0xf0, 0x9a, 0xee, 0x5c, 0xb9, 0x77, 0xc2) 357 #define LINUX_EFI_INITRD_MEDIA_GUID EFI_GUID(0x5568e427, 0x68fc, 0x4f3d, 0xac, 0x74, 0xca, 0x55, 0x52, 0x31, 0xcc, 0x68) 358 359 /* OEM GUIDs */ 360 #define DELLEMC_EFI_RCI2_TABLE_GUID EFI_GUID(0x2d9f28a2, 0xa886, 0x456a, 0x97, 0xa8, 0xf1, 0x1e, 0xf2, 0x4f, 0xf4, 0x55) 361 362 typedef struct { 363 efi_guid_t guid; 364 u64 table; 365 } efi_config_table_64_t; 366 367 typedef struct { 368 efi_guid_t guid; 369 u32 table; 370 } efi_config_table_32_t; 371 372 typedef union { 373 struct { 374 efi_guid_t guid; 375 void *table; 376 }; 377 efi_config_table_32_t mixed_mode; 378 } efi_config_table_t; 379 380 typedef struct { 381 efi_guid_t guid; 382 const char *name; 383 unsigned long *ptr; 384 } efi_config_table_type_t; 385 386 #define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL) 387 388 #define EFI_2_30_SYSTEM_TABLE_REVISION ((2 << 16) | (30)) 389 #define EFI_2_20_SYSTEM_TABLE_REVISION ((2 << 16) | (20)) 390 #define EFI_2_10_SYSTEM_TABLE_REVISION ((2 << 16) | (10)) 391 #define EFI_2_00_SYSTEM_TABLE_REVISION ((2 << 16) | (00)) 392 #define EFI_1_10_SYSTEM_TABLE_REVISION ((1 << 16) | (10)) 393 #define EFI_1_02_SYSTEM_TABLE_REVISION ((1 << 16) | (02)) 394 395 typedef struct { 396 efi_table_hdr_t hdr; 397 u64 fw_vendor; /* physical addr of CHAR16 vendor string */ 398 u32 fw_revision; 399 u32 __pad1; 400 u64 con_in_handle; 401 u64 con_in; 402 u64 con_out_handle; 403 u64 con_out; 404 u64 stderr_handle; 405 u64 stderr; 406 u64 runtime; 407 u64 boottime; 408 u32 nr_tables; 409 u32 __pad2; 410 u64 tables; 411 } efi_system_table_64_t; 412 413 typedef struct { 414 efi_table_hdr_t hdr; 415 u32 fw_vendor; /* physical addr of CHAR16 vendor string */ 416 u32 fw_revision; 417 u32 con_in_handle; 418 u32 con_in; 419 u32 con_out_handle; 420 u32 con_out; 421 u32 stderr_handle; 422 u32 stderr; 423 u32 runtime; 424 u32 boottime; 425 u32 nr_tables; 426 u32 tables; 427 } efi_system_table_32_t; 428 429 typedef union efi_simple_text_output_protocol efi_simple_text_output_protocol_t; 430 431 typedef union { 432 struct { 433 efi_table_hdr_t hdr; 434 unsigned long fw_vendor; /* physical addr of CHAR16 vendor string */ 435 u32 fw_revision; 436 unsigned long con_in_handle; 437 unsigned long con_in; 438 unsigned long con_out_handle; 439 efi_simple_text_output_protocol_t *con_out; 440 unsigned long stderr_handle; 441 unsigned long stderr; 442 efi_runtime_services_t *runtime; 443 efi_boot_services_t *boottime; 444 unsigned long nr_tables; 445 unsigned long tables; 446 }; 447 efi_system_table_32_t mixed_mode; 448 } efi_system_table_t; 449 450 /* 451 * Architecture independent structure for describing a memory map for the 452 * benefit of efi_memmap_init_early(), and for passing context between 453 * efi_memmap_alloc() and efi_memmap_install(). 454 */ 455 struct efi_memory_map_data { 456 phys_addr_t phys_map; 457 unsigned long size; 458 unsigned long desc_version; 459 unsigned long desc_size; 460 unsigned long flags; 461 }; 462 463 struct efi_memory_map { 464 phys_addr_t phys_map; 465 void *map; 466 void *map_end; 467 int nr_map; 468 unsigned long desc_version; 469 unsigned long desc_size; 470 #define EFI_MEMMAP_LATE (1UL << 0) 471 #define EFI_MEMMAP_MEMBLOCK (1UL << 1) 472 #define EFI_MEMMAP_SLAB (1UL << 2) 473 unsigned long flags; 474 }; 475 476 struct efi_mem_range { 477 struct range range; 478 u64 attribute; 479 }; 480 481 typedef struct { 482 u32 version; 483 u32 length; 484 u64 memory_protection_attribute; 485 } efi_properties_table_t; 486 487 #define EFI_PROPERTIES_TABLE_VERSION 0x00010000 488 #define EFI_PROPERTIES_RUNTIME_MEMORY_PROTECTION_NON_EXECUTABLE_PE_DATA 0x1 489 490 typedef struct { 491 u16 version; 492 u16 length; 493 u32 runtime_services_supported; 494 } efi_rt_properties_table_t; 495 496 #define EFI_RT_PROPERTIES_TABLE_VERSION 0x1 497 498 #define EFI_INVALID_TABLE_ADDR (~0UL) 499 500 typedef struct { 501 u32 version; 502 u32 num_entries; 503 u32 desc_size; 504 u32 reserved; 505 efi_memory_desc_t entry[0]; 506 } efi_memory_attributes_table_t; 507 508 typedef struct { 509 efi_guid_t signature_owner; 510 u8 signature_data[]; 511 } efi_signature_data_t; 512 513 typedef struct { 514 efi_guid_t signature_type; 515 u32 signature_list_size; 516 u32 signature_header_size; 517 u32 signature_size; 518 u8 signature_header[]; 519 /* efi_signature_data_t signatures[][] */ 520 } efi_signature_list_t; 521 522 typedef u8 efi_sha256_hash_t[32]; 523 524 typedef struct { 525 efi_sha256_hash_t to_be_signed_hash; 526 efi_time_t time_of_revocation; 527 } efi_cert_x509_sha256_t; 528 529 extern unsigned long __ro_after_init efi_rng_seed; /* RNG Seed table */ 530 531 /* 532 * All runtime access to EFI goes through this structure: 533 */ 534 extern struct efi { 535 const efi_runtime_services_t *runtime; /* EFI runtime services table */ 536 unsigned int runtime_version; /* Runtime services version */ 537 unsigned int runtime_supported_mask; 538 539 unsigned long acpi; /* ACPI table (IA64 ext 0.71) */ 540 unsigned long acpi20; /* ACPI table (ACPI 2.0) */ 541 unsigned long smbios; /* SMBIOS table (32 bit entry point) */ 542 unsigned long smbios3; /* SMBIOS table (64 bit entry point) */ 543 unsigned long esrt; /* ESRT table */ 544 unsigned long tpm_log; /* TPM2 Event Log table */ 545 unsigned long tpm_final_log; /* TPM2 Final Events Log table */ 546 547 efi_get_time_t *get_time; 548 efi_set_time_t *set_time; 549 efi_get_wakeup_time_t *get_wakeup_time; 550 efi_set_wakeup_time_t *set_wakeup_time; 551 efi_get_variable_t *get_variable; 552 efi_get_next_variable_t *get_next_variable; 553 efi_set_variable_t *set_variable; 554 efi_set_variable_t *set_variable_nonblocking; 555 efi_query_variable_info_t *query_variable_info; 556 efi_query_variable_info_t *query_variable_info_nonblocking; 557 efi_update_capsule_t *update_capsule; 558 efi_query_capsule_caps_t *query_capsule_caps; 559 efi_get_next_high_mono_count_t *get_next_high_mono_count; 560 efi_reset_system_t *reset_system; 561 562 struct efi_memory_map memmap; 563 unsigned long flags; 564 } efi; 565 566 #define EFI_RT_SUPPORTED_GET_TIME 0x0001 567 #define EFI_RT_SUPPORTED_SET_TIME 0x0002 568 #define EFI_RT_SUPPORTED_GET_WAKEUP_TIME 0x0004 569 #define EFI_RT_SUPPORTED_SET_WAKEUP_TIME 0x0008 570 #define EFI_RT_SUPPORTED_GET_VARIABLE 0x0010 571 #define EFI_RT_SUPPORTED_GET_NEXT_VARIABLE_NAME 0x0020 572 #define EFI_RT_SUPPORTED_SET_VARIABLE 0x0040 573 #define EFI_RT_SUPPORTED_SET_VIRTUAL_ADDRESS_MAP 0x0080 574 #define EFI_RT_SUPPORTED_CONVERT_POINTER 0x0100 575 #define EFI_RT_SUPPORTED_GET_NEXT_HIGH_MONOTONIC_COUNT 0x0200 576 #define EFI_RT_SUPPORTED_RESET_SYSTEM 0x0400 577 #define EFI_RT_SUPPORTED_UPDATE_CAPSULE 0x0800 578 #define EFI_RT_SUPPORTED_QUERY_CAPSULE_CAPABILITIES 0x1000 579 #define EFI_RT_SUPPORTED_QUERY_VARIABLE_INFO 0x2000 580 581 #define EFI_RT_SUPPORTED_ALL 0x3fff 582 583 #define EFI_RT_SUPPORTED_TIME_SERVICES 0x000f 584 #define EFI_RT_SUPPORTED_VARIABLE_SERVICES 0x0070 585 586 extern struct mm_struct efi_mm; 587 588 static inline int 589 efi_guidcmp (efi_guid_t left, efi_guid_t right) 590 { 591 return memcmp(&left, &right, sizeof (efi_guid_t)); 592 } 593 594 static inline char * 595 efi_guid_to_str(efi_guid_t *guid, char *out) 596 { 597 sprintf(out, "%pUl", guid->b); 598 return out; 599 } 600 601 extern void efi_init (void); 602 extern void *efi_get_pal_addr (void); 603 extern void efi_map_pal_code (void); 604 extern void efi_memmap_walk (efi_freemem_callback_t callback, void *arg); 605 extern void efi_gettimeofday (struct timespec64 *ts); 606 extern void efi_enter_virtual_mode (void); /* switch EFI to virtual mode, if possible */ 607 #ifdef CONFIG_X86 608 extern efi_status_t efi_query_variable_store(u32 attributes, 609 unsigned long size, 610 bool nonblocking); 611 #else 612 613 static inline efi_status_t efi_query_variable_store(u32 attributes, 614 unsigned long size, 615 bool nonblocking) 616 { 617 return EFI_SUCCESS; 618 } 619 #endif 620 extern void __iomem *efi_lookup_mapped_addr(u64 phys_addr); 621 622 extern int __init efi_memmap_alloc(unsigned int num_entries, 623 struct efi_memory_map_data *data); 624 extern void __efi_memmap_free(u64 phys, unsigned long size, 625 unsigned long flags); 626 extern int __init efi_memmap_init_early(struct efi_memory_map_data *data); 627 extern int __init efi_memmap_init_late(phys_addr_t addr, unsigned long size); 628 extern void __init efi_memmap_unmap(void); 629 extern int __init efi_memmap_install(struct efi_memory_map_data *data); 630 extern int __init efi_memmap_split_count(efi_memory_desc_t *md, 631 struct range *range); 632 extern void __init efi_memmap_insert(struct efi_memory_map *old_memmap, 633 void *buf, struct efi_mem_range *mem); 634 635 #ifdef CONFIG_EFI_ESRT 636 extern void __init efi_esrt_init(void); 637 #else 638 static inline void efi_esrt_init(void) { } 639 #endif 640 extern int efi_config_parse_tables(const efi_config_table_t *config_tables, 641 int count, 642 const efi_config_table_type_t *arch_tables); 643 extern int efi_systab_check_header(const efi_table_hdr_t *systab_hdr, 644 int min_major_version); 645 extern void efi_systab_report_header(const efi_table_hdr_t *systab_hdr, 646 unsigned long fw_vendor); 647 extern u64 efi_get_iobase (void); 648 extern int efi_mem_type(unsigned long phys_addr); 649 extern u64 efi_mem_attributes (unsigned long phys_addr); 650 extern u64 efi_mem_attribute (unsigned long phys_addr, unsigned long size); 651 extern int __init efi_uart_console_only (void); 652 extern u64 efi_mem_desc_end(efi_memory_desc_t *md); 653 extern int efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md); 654 extern void efi_mem_reserve(phys_addr_t addr, u64 size); 655 extern int efi_mem_reserve_persistent(phys_addr_t addr, u64 size); 656 extern void efi_initialize_iomem_resources(struct resource *code_resource, 657 struct resource *data_resource, struct resource *bss_resource); 658 extern u64 efi_get_fdt_params(struct efi_memory_map_data *data); 659 extern struct kobject *efi_kobj; 660 661 extern int efi_reboot_quirk_mode; 662 extern bool efi_poweroff_required(void); 663 664 #ifdef CONFIG_EFI_FAKE_MEMMAP 665 extern void __init efi_fake_memmap(void); 666 #else 667 static inline void efi_fake_memmap(void) { } 668 #endif 669 670 extern unsigned long efi_mem_attr_table; 671 672 /* 673 * efi_memattr_perm_setter - arch specific callback function passed into 674 * efi_memattr_apply_permissions() that updates the 675 * mapping permissions described by the second 676 * argument in the page tables referred to by the 677 * first argument. 678 */ 679 typedef int (*efi_memattr_perm_setter)(struct mm_struct *, efi_memory_desc_t *); 680 681 extern int efi_memattr_init(void); 682 extern int efi_memattr_apply_permissions(struct mm_struct *mm, 683 efi_memattr_perm_setter fn); 684 685 /* 686 * efi_early_memdesc_ptr - get the n-th EFI memmap descriptor 687 * @map: the start of efi memmap 688 * @desc_size: the size of space for each EFI memmap descriptor 689 * @n: the index of efi memmap descriptor 690 * 691 * EFI boot service provides the GetMemoryMap() function to get a copy of the 692 * current memory map which is an array of memory descriptors, each of 693 * which describes a contiguous block of memory. It also gets the size of the 694 * map, and the size of each descriptor, etc. 695 * 696 * Note that per section 6.2 of UEFI Spec 2.6 Errata A, the returned size of 697 * each descriptor might not be equal to sizeof(efi_memory_memdesc_t), 698 * since efi_memory_memdesc_t may be extended in the future. Thus the OS 699 * MUST use the returned size of the descriptor to find the start of each 700 * efi_memory_memdesc_t in the memory map array. This should only be used 701 * during bootup since for_each_efi_memory_desc_xxx() is available after the 702 * kernel initializes the EFI subsystem to set up struct efi_memory_map. 703 */ 704 #define efi_early_memdesc_ptr(map, desc_size, n) \ 705 (efi_memory_desc_t *)((void *)(map) + ((n) * (desc_size))) 706 707 /* Iterate through an efi_memory_map */ 708 #define for_each_efi_memory_desc_in_map(m, md) \ 709 for ((md) = (m)->map; \ 710 (md) && ((void *)(md) + (m)->desc_size) <= (m)->map_end; \ 711 (md) = (void *)(md) + (m)->desc_size) 712 713 /** 714 * for_each_efi_memory_desc - iterate over descriptors in efi.memmap 715 * @md: the efi_memory_desc_t * iterator 716 * 717 * Once the loop finishes @md must not be accessed. 718 */ 719 #define for_each_efi_memory_desc(md) \ 720 for_each_efi_memory_desc_in_map(&efi.memmap, md) 721 722 /* 723 * Format an EFI memory descriptor's type and attributes to a user-provided 724 * character buffer, as per snprintf(), and return the buffer. 725 */ 726 char * __init efi_md_typeattr_format(char *buf, size_t size, 727 const efi_memory_desc_t *md); 728 729 730 typedef void (*efi_element_handler_t)(const char *source, 731 const void *element_data, 732 size_t element_size); 733 extern int __init parse_efi_signature_list( 734 const char *source, 735 const void *data, size_t size, 736 efi_element_handler_t (*get_handler_for_guid)(const efi_guid_t *)); 737 738 /** 739 * efi_range_is_wc - check the WC bit on an address range 740 * @start: starting kvirt address 741 * @len: length of range 742 * 743 * Consult the EFI memory map and make sure it's ok to set this range WC. 744 * Returns true or false. 745 */ 746 static inline int efi_range_is_wc(unsigned long start, unsigned long len) 747 { 748 unsigned long i; 749 750 for (i = 0; i < len; i += (1UL << EFI_PAGE_SHIFT)) { 751 unsigned long paddr = __pa(start + i); 752 if (!(efi_mem_attributes(paddr) & EFI_MEMORY_WC)) 753 return 0; 754 } 755 /* The range checked out */ 756 return 1; 757 } 758 759 #ifdef CONFIG_EFI_PCDP 760 extern int __init efi_setup_pcdp_console(char *); 761 #endif 762 763 /* 764 * We play games with efi_enabled so that the compiler will, if 765 * possible, remove EFI-related code altogether. 766 */ 767 #define EFI_BOOT 0 /* Were we booted from EFI? */ 768 #define EFI_CONFIG_TABLES 2 /* Can we use EFI config tables? */ 769 #define EFI_RUNTIME_SERVICES 3 /* Can we use runtime services? */ 770 #define EFI_MEMMAP 4 /* Can we use EFI memory map? */ 771 #define EFI_64BIT 5 /* Is the firmware 64-bit? */ 772 #define EFI_PARAVIRT 6 /* Access is via a paravirt interface */ 773 #define EFI_ARCH_1 7 /* First arch-specific bit */ 774 #define EFI_DBG 8 /* Print additional debug info at runtime */ 775 #define EFI_NX_PE_DATA 9 /* Can runtime data regions be mapped non-executable? */ 776 #define EFI_MEM_ATTR 10 /* Did firmware publish an EFI_MEMORY_ATTRIBUTES table? */ 777 #define EFI_MEM_NO_SOFT_RESERVE 11 /* Is the kernel configured to ignore soft reservations? */ 778 #define EFI_PRESERVE_BS_REGIONS 12 /* Are EFI boot-services memory segments available? */ 779 780 #ifdef CONFIG_EFI 781 /* 782 * Test whether the above EFI_* bits are enabled. 783 */ 784 static inline bool efi_enabled(int feature) 785 { 786 return test_bit(feature, &efi.flags) != 0; 787 } 788 extern void efi_reboot(enum reboot_mode reboot_mode, const char *__unused); 789 790 bool __pure __efi_soft_reserve_enabled(void); 791 792 static inline bool __pure efi_soft_reserve_enabled(void) 793 { 794 return IS_ENABLED(CONFIG_EFI_SOFT_RESERVE) 795 && __efi_soft_reserve_enabled(); 796 } 797 798 static inline bool efi_rt_services_supported(unsigned int mask) 799 { 800 return (efi.runtime_supported_mask & mask) == mask; 801 } 802 #else 803 static inline bool efi_enabled(int feature) 804 { 805 return false; 806 } 807 static inline void 808 efi_reboot(enum reboot_mode reboot_mode, const char *__unused) {} 809 810 static inline bool 811 efi_capsule_pending(int *reset_type) 812 { 813 return false; 814 } 815 816 static inline bool efi_soft_reserve_enabled(void) 817 { 818 return false; 819 } 820 821 static inline bool efi_rt_services_supported(unsigned int mask) 822 { 823 return false; 824 } 825 #endif 826 827 extern int efi_status_to_err(efi_status_t status); 828 829 /* 830 * Variable Attributes 831 */ 832 #define EFI_VARIABLE_NON_VOLATILE 0x0000000000000001 833 #define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002 834 #define EFI_VARIABLE_RUNTIME_ACCESS 0x0000000000000004 835 #define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008 836 #define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010 837 #define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020 838 #define EFI_VARIABLE_APPEND_WRITE 0x0000000000000040 839 840 #define EFI_VARIABLE_MASK (EFI_VARIABLE_NON_VOLATILE | \ 841 EFI_VARIABLE_BOOTSERVICE_ACCESS | \ 842 EFI_VARIABLE_RUNTIME_ACCESS | \ 843 EFI_VARIABLE_HARDWARE_ERROR_RECORD | \ 844 EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \ 845 EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \ 846 EFI_VARIABLE_APPEND_WRITE) 847 /* 848 * Length of a GUID string (strlen("aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee")) 849 * not including trailing NUL 850 */ 851 #define EFI_VARIABLE_GUID_LEN UUID_STRING_LEN 852 853 /* 854 * EFI Device Path information 855 */ 856 #define EFI_DEV_HW 0x01 857 #define EFI_DEV_PCI 1 858 #define EFI_DEV_PCCARD 2 859 #define EFI_DEV_MEM_MAPPED 3 860 #define EFI_DEV_VENDOR 4 861 #define EFI_DEV_CONTROLLER 5 862 #define EFI_DEV_ACPI 0x02 863 #define EFI_DEV_BASIC_ACPI 1 864 #define EFI_DEV_EXPANDED_ACPI 2 865 #define EFI_DEV_MSG 0x03 866 #define EFI_DEV_MSG_ATAPI 1 867 #define EFI_DEV_MSG_SCSI 2 868 #define EFI_DEV_MSG_FC 3 869 #define EFI_DEV_MSG_1394 4 870 #define EFI_DEV_MSG_USB 5 871 #define EFI_DEV_MSG_USB_CLASS 15 872 #define EFI_DEV_MSG_I20 6 873 #define EFI_DEV_MSG_MAC 11 874 #define EFI_DEV_MSG_IPV4 12 875 #define EFI_DEV_MSG_IPV6 13 876 #define EFI_DEV_MSG_INFINIBAND 9 877 #define EFI_DEV_MSG_UART 14 878 #define EFI_DEV_MSG_VENDOR 10 879 #define EFI_DEV_MEDIA 0x04 880 #define EFI_DEV_MEDIA_HARD_DRIVE 1 881 #define EFI_DEV_MEDIA_CDROM 2 882 #define EFI_DEV_MEDIA_VENDOR 3 883 #define EFI_DEV_MEDIA_FILE 4 884 #define EFI_DEV_MEDIA_PROTOCOL 5 885 #define EFI_DEV_BIOS_BOOT 0x05 886 #define EFI_DEV_END_PATH 0x7F 887 #define EFI_DEV_END_PATH2 0xFF 888 #define EFI_DEV_END_INSTANCE 0x01 889 #define EFI_DEV_END_ENTIRE 0xFF 890 891 struct efi_generic_dev_path { 892 u8 type; 893 u8 sub_type; 894 u16 length; 895 } __packed; 896 897 struct efi_acpi_dev_path { 898 struct efi_generic_dev_path header; 899 u32 hid; 900 u32 uid; 901 } __packed; 902 903 struct efi_pci_dev_path { 904 struct efi_generic_dev_path header; 905 u8 fn; 906 u8 dev; 907 } __packed; 908 909 struct efi_vendor_dev_path { 910 struct efi_generic_dev_path header; 911 efi_guid_t vendorguid; 912 u8 vendordata[]; 913 } __packed; 914 915 struct efi_dev_path { 916 union { 917 struct efi_generic_dev_path header; 918 struct efi_acpi_dev_path acpi; 919 struct efi_pci_dev_path pci; 920 struct efi_vendor_dev_path vendor; 921 }; 922 } __packed; 923 924 struct device *efi_get_device_by_path(const struct efi_dev_path **node, 925 size_t *len); 926 927 static inline void memrange_efi_to_native(u64 *addr, u64 *npages) 928 { 929 *npages = PFN_UP(*addr + (*npages<<EFI_PAGE_SHIFT)) - PFN_DOWN(*addr); 930 *addr &= PAGE_MASK; 931 } 932 933 /* 934 * EFI Variable support. 935 * 936 * Different firmware drivers can expose their EFI-like variables using 937 * the following. 938 */ 939 940 struct efivar_operations { 941 efi_get_variable_t *get_variable; 942 efi_get_next_variable_t *get_next_variable; 943 efi_set_variable_t *set_variable; 944 efi_set_variable_t *set_variable_nonblocking; 945 efi_query_variable_store_t *query_variable_store; 946 }; 947 948 struct efivars { 949 struct kset *kset; 950 struct kobject *kobject; 951 const struct efivar_operations *ops; 952 }; 953 954 /* 955 * The maximum size of VariableName + Data = 1024 956 * Therefore, it's reasonable to save that much 957 * space in each part of the structure, 958 * and we use a page for reading/writing. 959 */ 960 961 #define EFI_VAR_NAME_LEN 1024 962 963 struct efi_variable { 964 efi_char16_t VariableName[EFI_VAR_NAME_LEN/sizeof(efi_char16_t)]; 965 efi_guid_t VendorGuid; 966 unsigned long DataSize; 967 __u8 Data[1024]; 968 efi_status_t Status; 969 __u32 Attributes; 970 } __attribute__((packed)); 971 972 struct efivar_entry { 973 struct efi_variable var; 974 struct list_head list; 975 struct kobject kobj; 976 bool scanning; 977 bool deleting; 978 }; 979 980 extern struct list_head efivar_sysfs_list; 981 982 static inline void 983 efivar_unregister(struct efivar_entry *var) 984 { 985 kobject_put(&var->kobj); 986 } 987 988 int efivars_register(struct efivars *efivars, 989 const struct efivar_operations *ops, 990 struct kobject *kobject); 991 int efivars_unregister(struct efivars *efivars); 992 struct kobject *efivars_kobject(void); 993 994 int efivar_init(int (*func)(efi_char16_t *, efi_guid_t, unsigned long, void *), 995 void *data, bool duplicates, struct list_head *head); 996 997 int efivar_entry_add(struct efivar_entry *entry, struct list_head *head); 998 int efivar_entry_remove(struct efivar_entry *entry); 999 1000 int __efivar_entry_delete(struct efivar_entry *entry); 1001 int efivar_entry_delete(struct efivar_entry *entry); 1002 1003 int efivar_entry_size(struct efivar_entry *entry, unsigned long *size); 1004 int __efivar_entry_get(struct efivar_entry *entry, u32 *attributes, 1005 unsigned long *size, void *data); 1006 int efivar_entry_get(struct efivar_entry *entry, u32 *attributes, 1007 unsigned long *size, void *data); 1008 int efivar_entry_set(struct efivar_entry *entry, u32 attributes, 1009 unsigned long size, void *data, struct list_head *head); 1010 int efivar_entry_set_get_size(struct efivar_entry *entry, u32 attributes, 1011 unsigned long *size, void *data, bool *set); 1012 int efivar_entry_set_safe(efi_char16_t *name, efi_guid_t vendor, u32 attributes, 1013 bool block, unsigned long size, void *data); 1014 1015 int efivar_entry_iter_begin(void); 1016 void efivar_entry_iter_end(void); 1017 1018 int __efivar_entry_iter(int (*func)(struct efivar_entry *, void *), 1019 struct list_head *head, void *data, 1020 struct efivar_entry **prev); 1021 int efivar_entry_iter(int (*func)(struct efivar_entry *, void *), 1022 struct list_head *head, void *data); 1023 1024 struct efivar_entry *efivar_entry_find(efi_char16_t *name, efi_guid_t guid, 1025 struct list_head *head, bool remove); 1026 1027 bool efivar_validate(efi_guid_t vendor, efi_char16_t *var_name, u8 *data, 1028 unsigned long data_size); 1029 bool efivar_variable_is_removable(efi_guid_t vendor, const char *name, 1030 size_t len); 1031 1032 extern struct work_struct efivar_work; 1033 void efivar_run_worker(void); 1034 1035 #if defined(CONFIG_EFI_VARS) || defined(CONFIG_EFI_VARS_MODULE) 1036 int efivars_sysfs_init(void); 1037 1038 #define EFIVARS_DATA_SIZE_MAX 1024 1039 1040 #endif /* CONFIG_EFI_VARS */ 1041 extern bool efi_capsule_pending(int *reset_type); 1042 1043 extern int efi_capsule_supported(efi_guid_t guid, u32 flags, 1044 size_t size, int *reset); 1045 1046 extern int efi_capsule_update(efi_capsule_header_t *capsule, 1047 phys_addr_t *pages); 1048 1049 #ifdef CONFIG_EFI_RUNTIME_MAP 1050 int efi_runtime_map_init(struct kobject *); 1051 int efi_get_runtime_map_size(void); 1052 int efi_get_runtime_map_desc_size(void); 1053 int efi_runtime_map_copy(void *buf, size_t bufsz); 1054 #else 1055 static inline int efi_runtime_map_init(struct kobject *kobj) 1056 { 1057 return 0; 1058 } 1059 1060 static inline int efi_get_runtime_map_size(void) 1061 { 1062 return 0; 1063 } 1064 1065 static inline int efi_get_runtime_map_desc_size(void) 1066 { 1067 return 0; 1068 } 1069 1070 static inline int efi_runtime_map_copy(void *buf, size_t bufsz) 1071 { 1072 return 0; 1073 } 1074 1075 #endif 1076 1077 #ifdef CONFIG_EFI 1078 extern bool efi_runtime_disabled(void); 1079 #else 1080 static inline bool efi_runtime_disabled(void) { return true; } 1081 #endif 1082 1083 extern void efi_call_virt_check_flags(unsigned long flags, const char *call); 1084 extern unsigned long efi_call_virt_save_flags(void); 1085 1086 enum efi_secureboot_mode { 1087 efi_secureboot_mode_unset, 1088 efi_secureboot_mode_unknown, 1089 efi_secureboot_mode_disabled, 1090 efi_secureboot_mode_enabled, 1091 }; 1092 enum efi_secureboot_mode efi_get_secureboot(void); 1093 1094 #ifdef CONFIG_RESET_ATTACK_MITIGATION 1095 void efi_enable_reset_attack_mitigation(void); 1096 #else 1097 static inline void 1098 efi_enable_reset_attack_mitigation(void) { } 1099 #endif 1100 1101 #ifdef CONFIG_EFI_EMBEDDED_FIRMWARE 1102 void efi_check_for_embedded_firmwares(void); 1103 #else 1104 static inline void efi_check_for_embedded_firmwares(void) { } 1105 #endif 1106 1107 efi_status_t efi_random_get_seed(void); 1108 1109 void efi_retrieve_tpm2_eventlog(void); 1110 1111 /* 1112 * Arch code can implement the following three template macros, avoiding 1113 * reptition for the void/non-void return cases of {__,}efi_call_virt(): 1114 * 1115 * * arch_efi_call_virt_setup() 1116 * 1117 * Sets up the environment for the call (e.g. switching page tables, 1118 * allowing kernel-mode use of floating point, if required). 1119 * 1120 * * arch_efi_call_virt() 1121 * 1122 * Performs the call. The last expression in the macro must be the call 1123 * itself, allowing the logic to be shared by the void and non-void 1124 * cases. 1125 * 1126 * * arch_efi_call_virt_teardown() 1127 * 1128 * Restores the usual kernel environment once the call has returned. 1129 */ 1130 1131 #define efi_call_virt_pointer(p, f, args...) \ 1132 ({ \ 1133 efi_status_t __s; \ 1134 unsigned long __flags; \ 1135 \ 1136 arch_efi_call_virt_setup(); \ 1137 \ 1138 __flags = efi_call_virt_save_flags(); \ 1139 __s = arch_efi_call_virt(p, f, args); \ 1140 efi_call_virt_check_flags(__flags, __stringify(f)); \ 1141 \ 1142 arch_efi_call_virt_teardown(); \ 1143 \ 1144 __s; \ 1145 }) 1146 1147 #define __efi_call_virt_pointer(p, f, args...) \ 1148 ({ \ 1149 unsigned long __flags; \ 1150 \ 1151 arch_efi_call_virt_setup(); \ 1152 \ 1153 __flags = efi_call_virt_save_flags(); \ 1154 arch_efi_call_virt(p, f, args); \ 1155 efi_call_virt_check_flags(__flags, __stringify(f)); \ 1156 \ 1157 arch_efi_call_virt_teardown(); \ 1158 }) 1159 1160 #define EFI_RANDOM_SEED_SIZE 64U 1161 1162 struct linux_efi_random_seed { 1163 u32 size; 1164 u8 bits[]; 1165 }; 1166 1167 struct linux_efi_tpm_eventlog { 1168 u32 size; 1169 u32 final_events_preboot_size; 1170 u8 version; 1171 u8 log[]; 1172 }; 1173 1174 extern int efi_tpm_eventlog_init(void); 1175 1176 struct efi_tcg2_final_events_table { 1177 u64 version; 1178 u64 nr_events; 1179 u8 events[]; 1180 }; 1181 extern int efi_tpm_final_log_size; 1182 1183 extern unsigned long rci2_table_phys; 1184 1185 /* 1186 * efi_runtime_service() function identifiers. 1187 * "NONE" is used by efi_recover_from_page_fault() to check if the page 1188 * fault happened while executing an efi runtime service. 1189 */ 1190 enum efi_rts_ids { 1191 EFI_NONE, 1192 EFI_GET_TIME, 1193 EFI_SET_TIME, 1194 EFI_GET_WAKEUP_TIME, 1195 EFI_SET_WAKEUP_TIME, 1196 EFI_GET_VARIABLE, 1197 EFI_GET_NEXT_VARIABLE, 1198 EFI_SET_VARIABLE, 1199 EFI_QUERY_VARIABLE_INFO, 1200 EFI_GET_NEXT_HIGH_MONO_COUNT, 1201 EFI_RESET_SYSTEM, 1202 EFI_UPDATE_CAPSULE, 1203 EFI_QUERY_CAPSULE_CAPS, 1204 }; 1205 1206 /* 1207 * efi_runtime_work: Details of EFI Runtime Service work 1208 * @arg<1-5>: EFI Runtime Service function arguments 1209 * @status: Status of executing EFI Runtime Service 1210 * @efi_rts_id: EFI Runtime Service function identifier 1211 * @efi_rts_comp: Struct used for handling completions 1212 */ 1213 struct efi_runtime_work { 1214 void *arg1; 1215 void *arg2; 1216 void *arg3; 1217 void *arg4; 1218 void *arg5; 1219 efi_status_t status; 1220 struct work_struct work; 1221 enum efi_rts_ids efi_rts_id; 1222 struct completion efi_rts_comp; 1223 }; 1224 1225 extern struct efi_runtime_work efi_rts_work; 1226 1227 /* Workqueue to queue EFI Runtime Services */ 1228 extern struct workqueue_struct *efi_rts_wq; 1229 1230 struct linux_efi_memreserve { 1231 int size; // allocated size of the array 1232 atomic_t count; // number of entries used 1233 phys_addr_t next; // pa of next struct instance 1234 struct { 1235 phys_addr_t base; 1236 phys_addr_t size; 1237 } entry[0]; 1238 }; 1239 1240 #define EFI_MEMRESERVE_SIZE(count) (sizeof(struct linux_efi_memreserve) + \ 1241 (count) * sizeof(((struct linux_efi_memreserve *)0)->entry[0])) 1242 1243 #define EFI_MEMRESERVE_COUNT(size) (((size) - sizeof(struct linux_efi_memreserve)) \ 1244 / sizeof(((struct linux_efi_memreserve *)0)->entry[0])) 1245 1246 void __init efi_arch_mem_reserve(phys_addr_t addr, u64 size); 1247 1248 #endif /* _LINUX_EFI_H */ 1249