include/linux/efi.h

   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_TIMEOUT             (18 | (1UL << (BITS_PER_LONG-1)))
  43 #define EFI_ABORTED             (21 | (1UL << (BITS_PER_LONG-1)))
  44 #define EFI_SECURITY_VIOLATION  (26 | (1UL << (BITS_PER_LONG-1)))
  45
  46 typedef unsigned long efi_status_t;
  47 typedef u8 efi_bool_t;
  48 typedef u16 efi_char16_t;               /* UNICODE character */
  49 typedef u64 efi_physical_addr_t;
  50 typedef void *efi_handle_t;
  51
  52 #if defined(CONFIG_X86_64)
  53 #define __efiapi __attribute__((ms_abi))
  54 #elif defined(CONFIG_X86_32)
  55 #define __efiapi __attribute__((regparm(0)))
  56 #else
  57 #define __efiapi
  58 #endif
  59
  60 /*
  61  * The UEFI spec and EDK2 reference implementation both define EFI_GUID as
  62  * struct { u32 a; u16; b; u16 c; u8 d[8]; }; and so the implied alignment
  63  * is 32 bits not 8 bits like our guid_t. In some cases (i.e., on 32-bit ARM),
  64  * this means that firmware services invoked by the kernel may assume that
  65  * efi_guid_t* arguments are 32-bit aligned, and use memory accessors that
  66  * do not tolerate misalignment. So let's set the minimum alignment to 32 bits.
  67  *
  68  * Note that the UEFI spec as well as some comments in the EDK2 code base
  69  * suggest that EFI_GUID should be 64-bit aligned, but this appears to be
  70  * a mistake, given that no code seems to exist that actually enforces that
  71  * or relies on it.
  72  */
  73 typedef guid_t efi_guid_t __aligned(__alignof__(u32));
  74
  75 #define EFI_GUID(a, b, c, d...) (efi_guid_t){ {                                 \
  76         (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff,  \
  77         (b) & 0xff, ((b) >> 8) & 0xff,                                          \
  78         (c) & 0xff, ((c) >> 8) & 0xff, d } }
  79
  80 /*
  81  * Generic EFI table header
  82  */
  83 typedef struct {
  84         u64 signature;
  85         u32 revision;
  86         u32 headersize;
  87         u32 crc32;
  88         u32 reserved;
  89 } efi_table_hdr_t;
  90
  91 /*
  92  * Memory map descriptor:
  93  */
  94
  95 /* Memory types: */
  96 #define EFI_RESERVED_TYPE                0
  97 #define EFI_LOADER_CODE                  1
  98 #define EFI_LOADER_DATA                  2
  99 #define EFI_BOOT_SERVICES_CODE           3
 100 #define EFI_BOOT_SERVICES_DATA           4
 101 #define EFI_RUNTIME_SERVICES_CODE        5
 102 #define EFI_RUNTIME_SERVICES_DATA        6
 103 #define EFI_CONVENTIONAL_MEMORY          7
 104 #define EFI_UNUSABLE_MEMORY              8
 105 #define EFI_ACPI_RECLAIM_MEMORY          9
 106 #define EFI_ACPI_MEMORY_NVS             10
 107 #define EFI_MEMORY_MAPPED_IO            11
 108 #define EFI_MEMORY_MAPPED_IO_PORT_SPACE 12
 109 #define EFI_PAL_CODE                    13
 110 #define EFI_PERSISTENT_MEMORY           14
 111 #define EFI_MAX_MEMORY_TYPE             15
 112
 113 /* Attribute values: */
 114 #define EFI_MEMORY_UC           ((u64)0x0000000000000001ULL)    /* uncached */
 115 #define EFI_MEMORY_WC           ((u64)0x0000000000000002ULL)    /* write-coalescing */
 116 #define EFI_MEMORY_WT           ((u64)0x0000000000000004ULL)    /* write-through */
 117 #define EFI_MEMORY_WB           ((u64)0x0000000000000008ULL)    /* write-back */
 118 #define EFI_MEMORY_UCE          ((u64)0x0000000000000010ULL)    /* uncached, exported */
 119 #define EFI_MEMORY_WP           ((u64)0x0000000000001000ULL)    /* write-protect */
 120 #define EFI_MEMORY_RP           ((u64)0x0000000000002000ULL)    /* read-protect */
 121 #define EFI_MEMORY_XP           ((u64)0x0000000000004000ULL)    /* execute-protect */
 122 #define EFI_MEMORY_NV           ((u64)0x0000000000008000ULL)    /* non-volatile */
 123 #define EFI_MEMORY_MORE_RELIABLE \
 124                                 ((u64)0x0000000000010000ULL)    /* higher reliability */
 125 #define EFI_MEMORY_RO           ((u64)0x0000000000020000ULL)    /* read-only */
 126 #define EFI_MEMORY_SP           ((u64)0x0000000000040000ULL)    /* soft reserved */
 127 #define EFI_MEMORY_CPU_CRYPTO   ((u64)0x0000000000080000ULL)    /* supports encryption */
 128 #define EFI_MEMORY_RUNTIME      ((u64)0x8000000000000000ULL)    /* range requires runtime mapping */
 129 #define EFI_MEMORY_DESCRIPTOR_VERSION   1
 130
 131 #define EFI_PAGE_SHIFT          12
 132 #define EFI_PAGE_SIZE           (1UL << EFI_PAGE_SHIFT)
 133 #define EFI_PAGES_MAX           (U64_MAX >> EFI_PAGE_SHIFT)
 134
 135 typedef struct {
 136         u32 type;
 137         u32 pad;
 138         u64 phys_addr;
 139         u64 virt_addr;
 140         u64 num_pages;
 141         u64 attribute;
 142 } efi_memory_desc_t;
 143
 144 typedef struct {
 145         efi_guid_t guid;
 146         u32 headersize;
 147         u32 flags;
 148         u32 imagesize;
 149 } efi_capsule_header_t;
 150
 151 /* EFI_FIRMWARE_MANAGEMENT_CAPSULE_HEADER */
 152 struct efi_manage_capsule_header {
 153         u32 ver;
 154         u16 emb_drv_cnt;
 155         u16 payload_cnt;
 156         /*
 157          * Variable-size array of the size given by the sum of
 158          * emb_drv_cnt and payload_cnt.
 159          */
 160         u64 offset_list[];
 161 } __packed;
 162
 163 /* EFI_FIRMWARE_MANAGEMENT_CAPSULE_IMAGE_HEADER */
 164 struct efi_manage_capsule_image_header {
 165         u32 ver;
 166         efi_guid_t image_type_id;
 167         u8 image_index;
 168         u8 reserved_bytes[3];
 169         u32 image_size;
 170         u32 vendor_code_size;
 171         /* hw_ins was introduced in version 2 */
 172         u64 hw_ins;
 173         /* capsule_support was introduced in version 3 */
 174         u64 capsule_support;
 175 } __packed;
 176
 177 /* WIN_CERTIFICATE */
 178 struct win_cert {
 179         u32 len;
 180         u16 rev;
 181         u16 cert_type;
 182 };
 183
 184 /* WIN_CERTIFICATE_UEFI_GUID */
 185 struct win_cert_uefi_guid {
 186         struct win_cert hdr;
 187         efi_guid_t cert_type;
 188         u8 cert_data[];
 189 };
 190
 191 /* EFI_FIRMWARE_IMAGE_AUTHENTICATION */
 192 struct efi_image_auth {
 193         u64 mon_count;
 194         struct win_cert_uefi_guid auth_info;
 195 };
 196
 197 /*
 198  * EFI capsule flags
 199  */
 200 #define EFI_CAPSULE_PERSIST_ACROSS_RESET        0x00010000
 201 #define EFI_CAPSULE_POPULATE_SYSTEM_TABLE       0x00020000
 202 #define EFI_CAPSULE_INITIATE_RESET              0x00040000
 203
 204 struct capsule_info {
 205         efi_capsule_header_t    header;
 206         efi_capsule_header_t    *capsule;
 207         int                     reset_type;
 208         long                    index;
 209         size_t                  count;
 210         size_t                  total_size;
 211         struct page             **pages;
 212         phys_addr_t             *phys;
 213         size_t                  page_bytes_remain;
 214 };
 215
 216 int efi_capsule_setup_info(struct capsule_info *cap_info, void *kbuff,
 217                            size_t hdr_bytes);
 218 int __efi_capsule_setup_info(struct capsule_info *cap_info);
 219
 220 /*
 221  * Types and defines for Time Services
 222  */
 223 #define EFI_TIME_ADJUST_DAYLIGHT 0x1
 224 #define EFI_TIME_IN_DAYLIGHT     0x2
 225 #define EFI_UNSPECIFIED_TIMEZONE 0x07ff
 226
 227 typedef struct {
 228         u16 year;
 229         u8 month;
 230         u8 day;
 231         u8 hour;
 232         u8 minute;
 233         u8 second;
 234         u8 pad1;
 235         u32 nanosecond;
 236         s16 timezone;
 237         u8 daylight;
 238         u8 pad2;
 239 } efi_time_t;
 240
 241 typedef struct {
 242         u32 resolution;
 243         u32 accuracy;
 244         u8 sets_to_zero;
 245 } efi_time_cap_t;
 246
 247 typedef union efi_boot_services efi_boot_services_t;
 248
 249 /*
 250  * Types and defines for EFI ResetSystem
 251  */
 252 #define EFI_RESET_COLD 0
 253 #define EFI_RESET_WARM 1
 254 #define EFI_RESET_SHUTDOWN 2
 255
 256 /*
 257  * EFI Runtime Services table
 258  */
 259 #define EFI_RUNTIME_SERVICES_SIGNATURE ((u64)0x5652453544e5552ULL)
 260 #define EFI_RUNTIME_SERVICES_REVISION  0x00010000
 261
 262 typedef struct {
 263         efi_table_hdr_t hdr;
 264         u32 get_time;
 265         u32 set_time;
 266         u32 get_wakeup_time;
 267         u32 set_wakeup_time;
 268         u32 set_virtual_address_map;
 269         u32 convert_pointer;
 270         u32 get_variable;
 271         u32 get_next_variable;
 272         u32 set_variable;
 273         u32 get_next_high_mono_count;
 274         u32 reset_system;
 275         u32 update_capsule;
 276         u32 query_capsule_caps;
 277         u32 query_variable_info;
 278 } efi_runtime_services_32_t;
 279
 280 typedef efi_status_t efi_get_time_t (efi_time_t *tm, efi_time_cap_t *tc);
 281 typedef efi_status_t efi_set_time_t (efi_time_t *tm);
 282 typedef efi_status_t efi_get_wakeup_time_t (efi_bool_t *enabled, efi_bool_t *pending,
 283                                             efi_time_t *tm);
 284 typedef efi_status_t efi_set_wakeup_time_t (efi_bool_t enabled, efi_time_t *tm);
 285 typedef efi_status_t efi_get_variable_t (efi_char16_t *name, efi_guid_t *vendor, u32 *attr,
 286                                          unsigned long *data_size, void *data);
 287 typedef efi_status_t efi_get_next_variable_t (unsigned long *name_size, efi_char16_t *name,
 288                                               efi_guid_t *vendor);
 289 typedef efi_status_t efi_set_variable_t (efi_char16_t *name, efi_guid_t *vendor,
 290                                          u32 attr, unsigned long data_size,
 291                                          void *data);
 292 typedef efi_status_t efi_get_next_high_mono_count_t (u32 *count);
 293 typedef void efi_reset_system_t (int reset_type, efi_status_t status,
 294                                  unsigned long data_size, efi_char16_t *data);
 295 typedef efi_status_t efi_set_virtual_address_map_t (unsigned long memory_map_size,
 296                                                 unsigned long descriptor_size,
 297                                                 u32 descriptor_version,
 298                                                 efi_memory_desc_t *virtual_map);
 299 typedef efi_status_t efi_query_variable_info_t(u32 attr,
 300                                                u64 *storage_space,
 301                                                u64 *remaining_space,
 302                                                u64 *max_variable_size);
 303 typedef efi_status_t efi_update_capsule_t(efi_capsule_header_t **capsules,
 304                                           unsigned long count,
 305                                           unsigned long sg_list);
 306 typedef efi_status_t efi_query_capsule_caps_t(efi_capsule_header_t **capsules,
 307                                               unsigned long count,
 308                                               u64 *max_size,
 309                                               int *reset_type);
 310 typedef efi_status_t efi_query_variable_store_t(u32 attributes,
 311                                                 unsigned long size,
 312                                                 bool nonblocking);
 313
 314 typedef union {
 315         struct {
 316                 efi_table_hdr_t                         hdr;
 317                 efi_get_time_t __efiapi                 *get_time;
 318                 efi_set_time_t __efiapi                 *set_time;
 319                 efi_get_wakeup_time_t __efiapi          *get_wakeup_time;
 320                 efi_set_wakeup_time_t __efiapi          *set_wakeup_time;
 321                 efi_set_virtual_address_map_t __efiapi  *set_virtual_address_map;
 322                 void                                    *convert_pointer;
 323                 efi_get_variable_t __efiapi             *get_variable;
 324                 efi_get_next_variable_t __efiapi        *get_next_variable;
 325                 efi_set_variable_t __efiapi             *set_variable;
 326                 efi_get_next_high_mono_count_t __efiapi *get_next_high_mono_count;
 327                 efi_reset_system_t __efiapi             *reset_system;
 328                 efi_update_capsule_t __efiapi           *update_capsule;
 329                 efi_query_capsule_caps_t __efiapi       *query_capsule_caps;
 330                 efi_query_variable_info_t __efiapi      *query_variable_info;
 331         };
 332         efi_runtime_services_32_t mixed_mode;
 333 } efi_runtime_services_t;
 334
 335 void efi_native_runtime_setup(void);
 336
 337 /*
 338  * EFI Configuration Table and GUID definitions
 339  *
 340  * These are all defined in a single line to make them easier to
 341  * grep for and to see them at a glance - while still having a
 342  * similar structure to the definitions in the spec.
 343  *
 344  * Here's how they are structured:
 345  *
 346  * GUID: 12345678-1234-1234-1234-123456789012
 347  * Spec:
 348  *      #define EFI_SOME_PROTOCOL_GUID \
 349  *        {0x12345678,0x1234,0x1234,\
 350  *          {0x12,0x34,0x12,0x34,0x56,0x78,0x90,0x12}}
 351  * Here:
 352  *      #define SOME_PROTOCOL_GUID              EFI_GUID(0x12345678, 0x1234, 0x1234,  0x12, 0x34, 0x12, 0x34, 0x56, 0x78, 0x90, 0x12)
 353  *                                      ^ tabs                                      ^extra space
 354  *
 355  * Note that the 'extra space' separates the values at the same place
 356  * where the UEFI SPEC breaks the line.
 357  */
 358 #define NULL_GUID                               EFI_GUID(0x00000000, 0x0000, 0x0000,  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00)
 359 #define MPS_TABLE_GUID                          EFI_GUID(0xeb9d2d2f, 0x2d88, 0x11d3,  0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
 360 #define ACPI_TABLE_GUID                         EFI_GUID(0xeb9d2d30, 0x2d88, 0x11d3,  0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
 361 #define ACPI_20_TABLE_GUID                      EFI_GUID(0x8868e871, 0xe4f1, 0x11d3,  0xbc, 0x22, 0x00, 0x80, 0xc7, 0x3c, 0x88, 0x81)
 362 #define SMBIOS_TABLE_GUID                       EFI_GUID(0xeb9d2d31, 0x2d88, 0x11d3,  0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
 363 #define SMBIOS3_TABLE_GUID                      EFI_GUID(0xf2fd1544, 0x9794, 0x4a2c,  0x99, 0x2e, 0xe5, 0xbb, 0xcf, 0x20, 0xe3, 0x94)
 364 #define SAL_SYSTEM_TABLE_GUID                   EFI_GUID(0xeb9d2d32, 0x2d88, 0x11d3,  0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
 365 #define HCDP_TABLE_GUID                         EFI_GUID(0xf951938d, 0x620b, 0x42ef,  0x82, 0x79, 0xa8, 0x4b, 0x79, 0x61, 0x78, 0x98)
 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
 421 #define RISCV_EFI_BOOT_PROTOCOL_GUID            EFI_GUID(0xccd15fec, 0x6f73, 0x4eec,  0x83, 0x95, 0x3e, 0x69, 0xe4, 0xb9, 0x40, 0xbf)
 422
 423 /*
 424  * This GUID may be installed onto the kernel image's handle as a NULL protocol
 425  * to signal to the stub that the placement of the image should be respected,
 426  * and moving the image in physical memory is undesirable. To ensure
 427  * compatibility with 64k pages kernels with virtually mapped stacks, and to
 428  * avoid defeating physical randomization, this protocol should only be
 429  * installed if the image was placed at a randomized 128k aligned address in
 430  * memory.
 431  */
 432 #define LINUX_EFI_LOADED_IMAGE_FIXED_GUID       EFI_GUID(0xf5a37b6d, 0x3344, 0x42a5,  0xb6, 0xbb, 0x97, 0x86, 0x48, 0xc1, 0x89, 0x0a)
 433
 434 /* OEM GUIDs */
 435 #define DELLEMC_EFI_RCI2_TABLE_GUID             EFI_GUID(0x2d9f28a2, 0xa886, 0x456a,  0x97, 0xa8, 0xf1, 0x1e, 0xf2, 0x4f, 0xf4, 0x55)
 436 #define AMD_SEV_MEM_ENCRYPT_GUID                EFI_GUID(0x0cf29b71, 0x9e51, 0x433a,  0xa3, 0xb7, 0x81, 0xf3, 0xab, 0x16, 0xb8, 0x75)
 437
 438 typedef struct {
 439         efi_guid_t guid;
 440         u64 table;
 441 } efi_config_table_64_t;
 442
 443 typedef struct {
 444         efi_guid_t guid;
 445         u32 table;
 446 } efi_config_table_32_t;
 447
 448 typedef union {
 449         struct {
 450                 efi_guid_t guid;
 451                 void *table;
 452         };
 453         efi_config_table_32_t mixed_mode;
 454 } efi_config_table_t;
 455
 456 typedef struct {
 457         efi_guid_t guid;
 458         unsigned long *ptr;
 459         const char name[16];
 460 } efi_config_table_type_t;
 461
 462 #define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL)
 463 #define EFI_DXE_SERVICES_TABLE_SIGNATURE ((u64)0x565245535f455844ULL)
 464
 465 #define EFI_2_30_SYSTEM_TABLE_REVISION  ((2 << 16) | (30))
 466 #define EFI_2_20_SYSTEM_TABLE_REVISION  ((2 << 16) | (20))
 467 #define EFI_2_10_SYSTEM_TABLE_REVISION  ((2 << 16) | (10))
 468 #define EFI_2_00_SYSTEM_TABLE_REVISION  ((2 << 16) | (00))
 469 #define EFI_1_10_SYSTEM_TABLE_REVISION  ((1 << 16) | (10))
 470 #define EFI_1_02_SYSTEM_TABLE_REVISION  ((1 << 16) | (02))
 471
 472 typedef struct {
 473         efi_table_hdr_t hdr;
 474         u64 fw_vendor;  /* physical addr of CHAR16 vendor string */
 475         u32 fw_revision;
 476         u32 __pad1;
 477         u64 con_in_handle;
 478         u64 con_in;
 479         u64 con_out_handle;
 480         u64 con_out;
 481         u64 stderr_handle;
 482         u64 stderr;
 483         u64 runtime;
 484         u64 boottime;
 485         u32 nr_tables;
 486         u32 __pad2;
 487         u64 tables;
 488 } efi_system_table_64_t;
 489
 490 typedef struct {
 491         efi_table_hdr_t hdr;
 492         u32 fw_vendor;  /* physical addr of CHAR16 vendor string */
 493         u32 fw_revision;
 494         u32 con_in_handle;
 495         u32 con_in;
 496         u32 con_out_handle;
 497         u32 con_out;
 498         u32 stderr_handle;
 499         u32 stderr;
 500         u32 runtime;
 501         u32 boottime;
 502         u32 nr_tables;
 503         u32 tables;
 504 } efi_system_table_32_t;
 505
 506 typedef union efi_simple_text_input_protocol efi_simple_text_input_protocol_t;
 507 typedef union efi_simple_text_output_protocol efi_simple_text_output_protocol_t;
 508
 509 typedef union {
 510         struct {
 511                 efi_table_hdr_t hdr;
 512                 unsigned long fw_vendor;        /* physical addr of CHAR16 vendor string */
 513                 u32 fw_revision;
 514                 unsigned long con_in_handle;
 515                 efi_simple_text_input_protocol_t *con_in;
 516                 unsigned long con_out_handle;
 517                 efi_simple_text_output_protocol_t *con_out;
 518                 unsigned long stderr_handle;
 519                 unsigned long stderr;
 520                 efi_runtime_services_t *runtime;
 521                 efi_boot_services_t *boottime;
 522                 unsigned long nr_tables;
 523                 unsigned long tables;
 524         };
 525         efi_system_table_32_t mixed_mode;
 526 } efi_system_table_t;
 527
 528 struct efi_boot_memmap {
 529         unsigned long           map_size;
 530         unsigned long           desc_size;
 531         u32                     desc_ver;
 532         unsigned long           map_key;
 533         unsigned long           buff_size;
 534         efi_memory_desc_t       map[];
 535 };
 536
 537 /*
 538  * Architecture independent structure for describing a memory map for the
 539  * benefit of efi_memmap_init_early(), and for passing context between
 540  * efi_memmap_alloc() and efi_memmap_install().
 541  */
 542 struct efi_memory_map_data {
 543         phys_addr_t phys_map;
 544         unsigned long size;
 545         unsigned long desc_version;
 546         unsigned long desc_size;
 547         unsigned long flags;
 548 };
 549
 550 struct efi_memory_map {
 551         phys_addr_t phys_map;
 552         void *map;
 553         void *map_end;
 554         int nr_map;
 555         unsigned long desc_version;
 556         unsigned long desc_size;
 557 #define EFI_MEMMAP_LATE (1UL << 0)
 558 #define EFI_MEMMAP_MEMBLOCK (1UL << 1)
 559 #define EFI_MEMMAP_SLAB (1UL << 2)
 560         unsigned long flags;
 561 };
 562
 563 struct efi_mem_range {
 564         struct range range;
 565         u64 attribute;
 566 };
 567
 568 typedef struct {
 569         u32 version;
 570         u32 length;
 571         u64 memory_protection_attribute;
 572 } efi_properties_table_t;
 573
 574 #define EFI_PROPERTIES_TABLE_VERSION    0x00010000
 575 #define EFI_PROPERTIES_RUNTIME_MEMORY_PROTECTION_NON_EXECUTABLE_PE_DATA 0x1
 576
 577 typedef struct {
 578         u16 version;
 579         u16 length;
 580         u32 runtime_services_supported;
 581 } efi_rt_properties_table_t;
 582
 583 #define EFI_RT_PROPERTIES_TABLE_VERSION 0x1
 584
 585 #define EFI_INVALID_TABLE_ADDR          (~0UL)
 586
 587 // BIT0 implies that Runtime code includes the forward control flow guard
 588 // instruction, such as X86 CET-IBT or ARM BTI.
 589 #define EFI_MEMORY_ATTRIBUTES_FLAGS_RT_FORWARD_CONTROL_FLOW_GUARD       0x1
 590
 591 typedef struct {
 592         u32 version;
 593         u32 num_entries;
 594         u32 desc_size;
 595         u32 flags;
 596         efi_memory_desc_t entry[0];
 597 } efi_memory_attributes_table_t;
 598
 599 typedef struct {
 600         efi_guid_t signature_owner;
 601         u8 signature_data[];
 602 } efi_signature_data_t;
 603
 604 typedef struct {
 605         efi_guid_t signature_type;
 606         u32 signature_list_size;
 607         u32 signature_header_size;
 608         u32 signature_size;
 609         u8 signature_header[];
 610         /* efi_signature_data_t signatures[][] */
 611 } efi_signature_list_t;
 612
 613 typedef u8 efi_sha256_hash_t[32];
 614
 615 typedef struct {
 616         efi_sha256_hash_t to_be_signed_hash;
 617         efi_time_t time_of_revocation;
 618 } efi_cert_x509_sha256_t;
 619
 620 extern unsigned long __ro_after_init efi_rng_seed;              /* RNG Seed table */
 621
 622 /*
 623  * All runtime access to EFI goes through this structure:
 624  */
 625 extern struct efi {
 626         const efi_runtime_services_t    *runtime;               /* EFI runtime services table */
 627         unsigned int                    runtime_version;        /* Runtime services version */
 628         unsigned int                    runtime_supported_mask;
 629
 630         unsigned long                   acpi;                   /* ACPI table  (IA64 ext 0.71) */
 631         unsigned long                   acpi20;                 /* ACPI table  (ACPI 2.0) */
 632         unsigned long                   smbios;                 /* SMBIOS table (32 bit entry point) */
 633         unsigned long                   smbios3;                /* SMBIOS table (64 bit entry point) */
 634         unsigned long                   esrt;                   /* ESRT table */
 635         unsigned long                   tpm_log;                /* TPM2 Event Log table */
 636         unsigned long                   tpm_final_log;          /* TPM2 Final Events Log table */
 637         unsigned long                   mokvar_table;           /* MOK variable config table */
 638         unsigned long                   coco_secret;            /* Confidential computing secret table */
 639
 640         efi_get_time_t                  *get_time;
 641         efi_set_time_t                  *set_time;
 642         efi_get_wakeup_time_t           *get_wakeup_time;
 643         efi_set_wakeup_time_t           *set_wakeup_time;
 644         efi_get_variable_t              *get_variable;
 645         efi_get_next_variable_t         *get_next_variable;
 646         efi_set_variable_t              *set_variable;
 647         efi_set_variable_t              *set_variable_nonblocking;
 648         efi_query_variable_info_t       *query_variable_info;
 649         efi_query_variable_info_t       *query_variable_info_nonblocking;
 650         efi_update_capsule_t            *update_capsule;
 651         efi_query_capsule_caps_t        *query_capsule_caps;
 652         efi_get_next_high_mono_count_t  *get_next_high_mono_count;
 653         efi_reset_system_t              *reset_system;
 654
 655         struct efi_memory_map           memmap;
 656         unsigned long                   flags;
 657 } efi;
 658
 659 #define EFI_RT_SUPPORTED_GET_TIME                               0x0001
 660 #define EFI_RT_SUPPORTED_SET_TIME                               0x0002
 661 #define EFI_RT_SUPPORTED_GET_WAKEUP_TIME                        0x0004
 662 #define EFI_RT_SUPPORTED_SET_WAKEUP_TIME                        0x0008
 663 #define EFI_RT_SUPPORTED_GET_VARIABLE                           0x0010
 664 #define EFI_RT_SUPPORTED_GET_NEXT_VARIABLE_NAME                 0x0020
 665 #define EFI_RT_SUPPORTED_SET_VARIABLE                           0x0040
 666 #define EFI_RT_SUPPORTED_SET_VIRTUAL_ADDRESS_MAP                0x0080
 667 #define EFI_RT_SUPPORTED_CONVERT_POINTER                        0x0100
 668 #define EFI_RT_SUPPORTED_GET_NEXT_HIGH_MONOTONIC_COUNT          0x0200
 669 #define EFI_RT_SUPPORTED_RESET_SYSTEM                           0x0400
 670 #define EFI_RT_SUPPORTED_UPDATE_CAPSULE                         0x0800
 671 #define EFI_RT_SUPPORTED_QUERY_CAPSULE_CAPABILITIES             0x1000
 672 #define EFI_RT_SUPPORTED_QUERY_VARIABLE_INFO                    0x2000
 673
 674 #define EFI_RT_SUPPORTED_ALL                                    0x3fff
 675
 676 #define EFI_RT_SUPPORTED_TIME_SERVICES                          0x0003
 677 #define EFI_RT_SUPPORTED_WAKEUP_SERVICES                        0x000c
 678 #define EFI_RT_SUPPORTED_VARIABLE_SERVICES                      0x0070
 679
 680 extern struct mm_struct efi_mm;
 681
 682 static inline int
 683 efi_guidcmp (efi_guid_t left, efi_guid_t right)
 684 {
 685         return memcmp(&left, &right, sizeof (efi_guid_t));
 686 }
 687
 688 static inline char *
 689 efi_guid_to_str(efi_guid_t *guid, char *out)
 690 {
 691         sprintf(out, "%pUl", guid->b);
 692         return out;
 693 }
 694
 695 extern void efi_init (void);
 696 #ifdef CONFIG_EFI
 697 extern void efi_enter_virtual_mode (void);      /* switch EFI to virtual mode, if possible */
 698 #else
 699 static inline void efi_enter_virtual_mode (void) {}
 700 #endif
 701 #ifdef CONFIG_X86
 702 extern efi_status_t efi_query_variable_store(u32 attributes,
 703                                              unsigned long size,
 704                                              bool nonblocking);
 705 #else
 706
 707 static inline efi_status_t efi_query_variable_store(u32 attributes,
 708                                                     unsigned long size,
 709                                                     bool nonblocking)
 710 {
 711         return EFI_SUCCESS;
 712 }
 713 #endif
 714 extern void __iomem *efi_lookup_mapped_addr(u64 phys_addr);
 715
 716 extern int __init __efi_memmap_init(struct efi_memory_map_data *data);
 717 extern int __init efi_memmap_init_early(struct efi_memory_map_data *data);
 718 extern int __init efi_memmap_init_late(phys_addr_t addr, unsigned long size);
 719 extern void __init efi_memmap_unmap(void);
 720
 721 #ifdef CONFIG_EFI_ESRT
 722 extern void __init efi_esrt_init(void);
 723 #else
 724 static inline void efi_esrt_init(void) { }
 725 #endif
 726 extern int efi_config_parse_tables(const efi_config_table_t *config_tables,
 727                                    int count,
 728                                    const efi_config_table_type_t *arch_tables);
 729 extern int efi_systab_check_header(const efi_table_hdr_t *systab_hdr);
 730 extern void efi_systab_report_header(const efi_table_hdr_t *systab_hdr,
 731                                      unsigned long fw_vendor);
 732 extern u64 efi_get_iobase (void);
 733 extern int efi_mem_type(unsigned long phys_addr);
 734 extern u64 efi_mem_attributes (unsigned long phys_addr);
 735 extern u64 efi_mem_attribute (unsigned long phys_addr, unsigned long size);
 736 extern int __init efi_uart_console_only (void);
 737 extern u64 efi_mem_desc_end(efi_memory_desc_t *md);
 738 extern int efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md);
 739 extern int __efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md);
 740 extern void efi_mem_reserve(phys_addr_t addr, u64 size);
 741 extern int efi_mem_reserve_persistent(phys_addr_t addr, u64 size);
 742 extern void efi_initialize_iomem_resources(struct resource *code_resource,
 743                 struct resource *data_resource, struct resource *bss_resource);
 744 extern u64 efi_get_fdt_params(struct efi_memory_map_data *data);
 745 extern struct kobject *efi_kobj;
 746
 747 extern int efi_reboot_quirk_mode;
 748 extern bool efi_poweroff_required(void);
 749
 750 extern unsigned long efi_mem_attr_table;
 751
 752 /*
 753  * efi_memattr_perm_setter - arch specific callback function passed into
 754  *                           efi_memattr_apply_permissions() that updates the
 755  *                           mapping permissions described by the second
 756  *                           argument in the page tables referred to by the
 757  *                           first argument.
 758  */
 759 typedef int (*efi_memattr_perm_setter)(struct mm_struct *, efi_memory_desc_t *, bool);
 760
 761 extern int efi_memattr_init(void);
 762 extern int efi_memattr_apply_permissions(struct mm_struct *mm,
 763                                          efi_memattr_perm_setter fn);
 764
 765 /*
 766  * efi_early_memdesc_ptr - get the n-th EFI memmap descriptor
 767  * @map: the start of efi memmap
 768  * @desc_size: the size of space for each EFI memmap descriptor
 769  * @n: the index of efi memmap descriptor
 770  *
 771  * EFI boot service provides the GetMemoryMap() function to get a copy of the
 772  * current memory map which is an array of memory descriptors, each of
 773  * which describes a contiguous block of memory. It also gets the size of the
 774  * map, and the size of each descriptor, etc.
 775  *
 776  * Note that per section 6.2 of UEFI Spec 2.6 Errata A, the returned size of
 777  * each descriptor might not be equal to sizeof(efi_memory_memdesc_t),
 778  * since efi_memory_memdesc_t may be extended in the future. Thus the OS
 779  * MUST use the returned size of the descriptor to find the start of each
 780  * efi_memory_memdesc_t in the memory map array. This should only be used
 781  * during bootup since for_each_efi_memory_desc_xxx() is available after the
 782  * kernel initializes the EFI subsystem to set up struct efi_memory_map.
 783  */
 784 #define efi_early_memdesc_ptr(map, desc_size, n)                        \
 785         (efi_memory_desc_t *)((void *)(map) + ((n) * (desc_size)))
 786
 787 /* Iterate through an efi_memory_map */
 788 #define for_each_efi_memory_desc_in_map(m, md)                             \
 789         for ((md) = (m)->map;                                              \
 790              (md) && ((void *)(md) + (m)->desc_size) <= (m)->map_end;      \
 791              (md) = (void *)(md) + (m)->desc_size)
 792
 793 /**
 794  * for_each_efi_memory_desc - iterate over descriptors in efi.memmap
 795  * @md: the efi_memory_desc_t * iterator
 796  *
 797  * Once the loop finishes @md must not be accessed.
 798  */
 799 #define for_each_efi_memory_desc(md) \
 800         for_each_efi_memory_desc_in_map(&efi.memmap, md)
 801
 802 /*
 803  * Format an EFI memory descriptor's type and attributes to a user-provided
 804  * character buffer, as per snprintf(), and return the buffer.
 805  */
 806 char * __init efi_md_typeattr_format(char *buf, size_t size,
 807                                      const efi_memory_desc_t *md);
 808
 809
 810 typedef void (*efi_element_handler_t)(const char *source,
 811                                       const void *element_data,
 812                                       size_t element_size);
 813 extern int __init parse_efi_signature_list(
 814         const char *source,
 815         const void *data, size_t size,
 816         efi_element_handler_t (*get_handler_for_guid)(const efi_guid_t *));
 817
 818 /**
 819  * efi_range_is_wc - check the WC bit on an address range
 820  * @start: starting kvirt address
 821  * @len: length of range
 822  *
 823  * Consult the EFI memory map and make sure it's ok to set this range WC.
 824  * Returns true or false.
 825  */
 826 static inline int efi_range_is_wc(unsigned long start, unsigned long len)
 827 {
 828         unsigned long i;
 829
 830         for (i = 0; i < len; i += (1UL << EFI_PAGE_SHIFT)) {
 831                 unsigned long paddr = __pa(start + i);
 832                 if (!(efi_mem_attributes(paddr) & EFI_MEMORY_WC))
 833                         return 0;
 834         }
 835         /* The range checked out */
 836         return 1;
 837 }
 838
 839 #ifdef CONFIG_EFI_PCDP
 840 extern int __init efi_setup_pcdp_console(char *);
 841 #endif
 842
 843 /*
 844  * We play games with efi_enabled so that the compiler will, if
 845  * possible, remove EFI-related code altogether.
 846  */
 847 #define EFI_BOOT                0       /* Were we booted from EFI? */
 848 #define EFI_CONFIG_TABLES       2       /* Can we use EFI config tables? */
 849 #define EFI_RUNTIME_SERVICES    3       /* Can we use runtime services? */
 850 #define EFI_MEMMAP              4       /* Can we use EFI memory map? */
 851 #define EFI_64BIT               5       /* Is the firmware 64-bit? */
 852 #define EFI_PARAVIRT            6       /* Access is via a paravirt interface */
 853 #define EFI_ARCH_1              7       /* First arch-specific bit */
 854 #define EFI_DBG                 8       /* Print additional debug info at runtime */
 855 #define EFI_NX_PE_DATA          9       /* Can runtime data regions be mapped non-executable? */
 856 #define EFI_MEM_ATTR            10      /* Did firmware publish an EFI_MEMORY_ATTRIBUTES table? */
 857 #define EFI_MEM_NO_SOFT_RESERVE 11      /* Is the kernel configured to ignore soft reservations? */
 858 #define EFI_PRESERVE_BS_REGIONS 12      /* Are EFI boot-services memory segments available? */
 859
 860 #ifdef CONFIG_EFI
 861 /*
 862  * Test whether the above EFI_* bits are enabled.
 863  */
 864 static inline bool efi_enabled(int feature)
 865 {
 866         return test_bit(feature, &efi.flags) != 0;
 867 }
 868 extern void efi_reboot(enum reboot_mode reboot_mode, const char *__unused);
 869
 870 bool __pure __efi_soft_reserve_enabled(void);
 871
 872 static inline bool __pure efi_soft_reserve_enabled(void)
 873 {
 874         return IS_ENABLED(CONFIG_EFI_SOFT_RESERVE)
 875                 && __efi_soft_reserve_enabled();
 876 }
 877
 878 static inline bool efi_rt_services_supported(unsigned int mask)
 879 {
 880         return (efi.runtime_supported_mask & mask) == mask;
 881 }
 882 extern void efi_find_mirror(void);
 883 #else
 884 static inline bool efi_enabled(int feature)
 885 {
 886         return false;
 887 }
 888 static inline void
 889 efi_reboot(enum reboot_mode reboot_mode, const char *__unused) {}
 890
 891 static inline bool efi_soft_reserve_enabled(void)
 892 {
 893         return false;
 894 }
 895
 896 static inline bool efi_rt_services_supported(unsigned int mask)
 897 {
 898         return false;
 899 }
 900
 901 static inline void efi_find_mirror(void) {}
 902 #endif
 903
 904 extern int efi_status_to_err(efi_status_t status);
 905
 906 /*
 907  * Variable Attributes
 908  */
 909 #define EFI_VARIABLE_NON_VOLATILE       0x0000000000000001
 910 #define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
 911 #define EFI_VARIABLE_RUNTIME_ACCESS     0x0000000000000004
 912 #define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008
 913 #define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010
 914 #define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020
 915 #define EFI_VARIABLE_APPEND_WRITE       0x0000000000000040
 916
 917 #define EFI_VARIABLE_MASK       (EFI_VARIABLE_NON_VOLATILE | \
 918                                 EFI_VARIABLE_BOOTSERVICE_ACCESS | \
 919                                 EFI_VARIABLE_RUNTIME_ACCESS | \
 920                                 EFI_VARIABLE_HARDWARE_ERROR_RECORD | \
 921                                 EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \
 922                                 EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \
 923                                 EFI_VARIABLE_APPEND_WRITE)
 924 /*
 925  * Length of a GUID string (strlen("aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee"))
 926  * not including trailing NUL
 927  */
 928 #define EFI_VARIABLE_GUID_LEN   UUID_STRING_LEN
 929
 930 /*
 931  * EFI Device Path information
 932  */
 933 #define EFI_DEV_HW                      0x01
 934 #define  EFI_DEV_PCI                             1
 935 #define  EFI_DEV_PCCARD                          2
 936 #define  EFI_DEV_MEM_MAPPED                      3
 937 #define  EFI_DEV_VENDOR                          4
 938 #define  EFI_DEV_CONTROLLER                      5
 939 #define EFI_DEV_ACPI                    0x02
 940 #define   EFI_DEV_BASIC_ACPI                     1
 941 #define   EFI_DEV_EXPANDED_ACPI                  2
 942 #define EFI_DEV_MSG                     0x03
 943 #define   EFI_DEV_MSG_ATAPI                      1
 944 #define   EFI_DEV_MSG_SCSI                       2
 945 #define   EFI_DEV_MSG_FC                         3
 946 #define   EFI_DEV_MSG_1394                       4
 947 #define   EFI_DEV_MSG_USB                        5
 948 #define   EFI_DEV_MSG_USB_CLASS                 15
 949 #define   EFI_DEV_MSG_I20                        6
 950 #define   EFI_DEV_MSG_MAC                       11
 951 #define   EFI_DEV_MSG_IPV4                      12
 952 #define   EFI_DEV_MSG_IPV6                      13
 953 #define   EFI_DEV_MSG_INFINIBAND                 9
 954 #define   EFI_DEV_MSG_UART                      14
 955 #define   EFI_DEV_MSG_VENDOR                    10
 956 #define EFI_DEV_MEDIA                   0x04
 957 #define   EFI_DEV_MEDIA_HARD_DRIVE               1
 958 #define   EFI_DEV_MEDIA_CDROM                    2
 959 #define   EFI_DEV_MEDIA_VENDOR                   3
 960 #define   EFI_DEV_MEDIA_FILE                     4
 961 #define   EFI_DEV_MEDIA_PROTOCOL                 5
 962 #define   EFI_DEV_MEDIA_REL_OFFSET               8
 963 #define EFI_DEV_BIOS_BOOT               0x05
 964 #define EFI_DEV_END_PATH                0x7F
 965 #define EFI_DEV_END_PATH2               0xFF
 966 #define   EFI_DEV_END_INSTANCE                  0x01
 967 #define   EFI_DEV_END_ENTIRE                    0xFF
 968
 969 struct efi_generic_dev_path {
 970         u8                              type;
 971         u8                              sub_type;
 972         u16                             length;
 973 } __packed;
 974
 975 struct efi_acpi_dev_path {
 976         struct efi_generic_dev_path     header;
 977         u32                             hid;
 978         u32                             uid;
 979 } __packed;
 980
 981 struct efi_pci_dev_path {
 982         struct efi_generic_dev_path     header;
 983         u8                              fn;
 984         u8                              dev;
 985 } __packed;
 986
 987 struct efi_vendor_dev_path {
 988         struct efi_generic_dev_path     header;
 989         efi_guid_t                      vendorguid;
 990         u8                              vendordata[];
 991 } __packed;
 992
 993 struct efi_rel_offset_dev_path {
 994         struct efi_generic_dev_path     header;
 995         u32                             reserved;
 996         u64                             starting_offset;
 997         u64                             ending_offset;
 998 } __packed;
 999
1000 struct efi_mem_mapped_dev_path {
1001         struct efi_generic_dev_path     header;
1002         u32                             memory_type;
1003         u64                             starting_addr;
1004         u64                             ending_addr;
1005 } __packed;
1006
1007 struct efi_file_path_dev_path {
1008         struct efi_generic_dev_path     header;
1009         efi_char16_t                    filename[];
1010 } __packed;
1011
1012 struct efi_dev_path {
1013         union {
1014                 struct efi_generic_dev_path     header;
1015                 struct efi_acpi_dev_path        acpi;
1016                 struct efi_pci_dev_path         pci;
1017                 struct efi_vendor_dev_path      vendor;
1018                 struct efi_rel_offset_dev_path  rel_offset;
1019         };
1020 } __packed;
1021
1022 struct device *efi_get_device_by_path(const struct efi_dev_path **node,
1023                                       size_t *len);
1024
1025 static inline void memrange_efi_to_native(u64 *addr, u64 *npages)
1026 {
1027         *npages = PFN_UP(*addr + (*npages<<EFI_PAGE_SHIFT)) - PFN_DOWN(*addr);
1028         *addr &= PAGE_MASK;
1029 }
1030
1031 /*
1032  * EFI Variable support.
1033  *
1034  * Different firmware drivers can expose their EFI-like variables using
1035  * the following.
1036  */
1037
1038 struct efivar_operations {
1039         efi_get_variable_t *get_variable;
1040         efi_get_next_variable_t *get_next_variable;
1041         efi_set_variable_t *set_variable;
1042         efi_set_variable_t *set_variable_nonblocking;
1043         efi_query_variable_store_t *query_variable_store;
1044 };
1045
1046 struct efivars {
1047         struct kset *kset;
1048         const struct efivar_operations *ops;
1049 };
1050
1051 /*
1052  * The maximum size of VariableName + Data = 1024
1053  * Therefore, it's reasonable to save that much
1054  * space in each part of the structure,
1055  * and we use a page for reading/writing.
1056  */
1057
1058 #define EFI_VAR_NAME_LEN        1024
1059
1060 int efivars_register(struct efivars *efivars,
1061                      const struct efivar_operations *ops);
1062 int efivars_unregister(struct efivars *efivars);
1063
1064 #ifdef CONFIG_EFI
1065 bool efivar_is_available(void);
1066 #else
1067 static inline bool efivar_is_available(void) { return false; }
1068 #endif
1069
1070 bool efivar_supports_writes(void);
1071
1072 int efivar_lock(void);
1073 int efivar_trylock(void);
1074 void efivar_unlock(void);
1075
1076 efi_status_t efivar_get_variable(efi_char16_t *name, efi_guid_t *vendor,
1077                                  u32 *attr, unsigned long *size, void *data);
1078
1079 efi_status_t efivar_get_next_variable(unsigned long *name_size,
1080                                       efi_char16_t *name, efi_guid_t *vendor);
1081
1082 efi_status_t efivar_set_variable_locked(efi_char16_t *name, efi_guid_t *vendor,
1083                                         u32 attr, unsigned long data_size,
1084                                         void *data, bool nonblocking);
1085
1086 efi_status_t efivar_set_variable(efi_char16_t *name, efi_guid_t *vendor,
1087                                  u32 attr, unsigned long data_size, void *data);
1088
1089 #if IS_ENABLED(CONFIG_EFI_CAPSULE_LOADER)
1090 extern bool efi_capsule_pending(int *reset_type);
1091
1092 extern int efi_capsule_supported(efi_guid_t guid, u32 flags,
1093                                  size_t size, int *reset);
1094
1095 extern int efi_capsule_update(efi_capsule_header_t *capsule,
1096                               phys_addr_t *pages);
1097 #else
1098 static inline bool efi_capsule_pending(int *reset_type) { return false; }
1099 #endif
1100
1101 #ifdef CONFIG_EFI
1102 extern bool efi_runtime_disabled(void);
1103 #else
1104 static inline bool efi_runtime_disabled(void) { return true; }
1105 #endif
1106
1107 extern void efi_call_virt_check_flags(unsigned long flags, const char *call);
1108 extern unsigned long efi_call_virt_save_flags(void);
1109
1110 enum efi_secureboot_mode {
1111         efi_secureboot_mode_unset,
1112         efi_secureboot_mode_unknown,
1113         efi_secureboot_mode_disabled,
1114         efi_secureboot_mode_enabled,
1115 };
1116
1117 static inline
1118 enum efi_secureboot_mode efi_get_secureboot_mode(efi_get_variable_t *get_var)
1119 {
1120         u8 secboot, setupmode = 0;
1121         efi_status_t status;
1122         unsigned long size;
1123
1124         size = sizeof(secboot);
1125         status = get_var(L"SecureBoot", &EFI_GLOBAL_VARIABLE_GUID, NULL, &size,
1126                          &secboot);
1127         if (status == EFI_NOT_FOUND)
1128                 return efi_secureboot_mode_disabled;
1129         if (status != EFI_SUCCESS)
1130                 return efi_secureboot_mode_unknown;
1131
1132         size = sizeof(setupmode);
1133         get_var(L"SetupMode", &EFI_GLOBAL_VARIABLE_GUID, NULL, &size, &setupmode);
1134         if (secboot == 0 || setupmode == 1)
1135                 return efi_secureboot_mode_disabled;
1136         return efi_secureboot_mode_enabled;
1137 }
1138
1139 #ifdef CONFIG_EFI_EMBEDDED_FIRMWARE
1140 void efi_check_for_embedded_firmwares(void);
1141 #else
1142 static inline void efi_check_for_embedded_firmwares(void) { }
1143 #endif
1144
1145 #define arch_efi_call_virt(p, f, args...)       ((p)->f(args))
1146
1147 /*
1148  * Arch code can implement the following three template macros, avoiding
1149  * reptition for the void/non-void return cases of {__,}efi_call_virt():
1150  *
1151  *  * arch_efi_call_virt_setup()
1152  *
1153  *    Sets up the environment for the call (e.g. switching page tables,
1154  *    allowing kernel-mode use of floating point, if required).
1155  *
1156  *  * arch_efi_call_virt()
1157  *
1158  *    Performs the call. The last expression in the macro must be the call
1159  *    itself, allowing the logic to be shared by the void and non-void
1160  *    cases.
1161  *
1162  *  * arch_efi_call_virt_teardown()
1163  *
1164  *    Restores the usual kernel environment once the call has returned.
1165  */
1166
1167 #define efi_call_virt_pointer(p, f, args...)                            \
1168 ({                                                                      \
1169         efi_status_t __s;                                               \
1170         unsigned long __flags;                                          \
1171                                                                         \
1172         arch_efi_call_virt_setup();                                     \
1173                                                                         \
1174         __flags = efi_call_virt_save_flags();                           \
1175         __s = arch_efi_call_virt(p, f, args);                           \
1176         efi_call_virt_check_flags(__flags, __stringify(f));             \
1177                                                                         \
1178         arch_efi_call_virt_teardown();                                  \
1179                                                                         \
1180         __s;                                                            \
1181 })
1182
1183 #define __efi_call_virt_pointer(p, f, args...)                          \
1184 ({                                                                      \
1185         unsigned long __flags;                                          \
1186                                                                         \
1187         arch_efi_call_virt_setup();                                     \
1188                                                                         \
1189         __flags = efi_call_virt_save_flags();                           \
1190         arch_efi_call_virt(p, f, args);                                 \
1191         efi_call_virt_check_flags(__flags, __stringify(f));             \
1192                                                                         \
1193         arch_efi_call_virt_teardown();                                  \
1194 })
1195
1196 #define EFI_RANDOM_SEED_SIZE            32U // BLAKE2S_HASH_SIZE
1197
1198 struct linux_efi_random_seed {
1199         u32     size;
1200         u8      bits[];
1201 };
1202
1203 struct linux_efi_tpm_eventlog {
1204         u32     size;
1205         u32     final_events_preboot_size;
1206         u8      version;
1207         u8      log[];
1208 };
1209
1210 extern int efi_tpm_eventlog_init(void);
1211
1212 struct efi_tcg2_final_events_table {
1213         u64 version;
1214         u64 nr_events;
1215         u8 events[];
1216 };
1217 extern int efi_tpm_final_log_size;
1218
1219 extern unsigned long rci2_table_phys;
1220
1221 /*
1222  * efi_runtime_service() function identifiers.
1223  * "NONE" is used by efi_recover_from_page_fault() to check if the page
1224  * fault happened while executing an efi runtime service.
1225  */
1226 enum efi_rts_ids {
1227         EFI_NONE,
1228         EFI_GET_TIME,
1229         EFI_SET_TIME,
1230         EFI_GET_WAKEUP_TIME,
1231         EFI_SET_WAKEUP_TIME,
1232         EFI_GET_VARIABLE,
1233         EFI_GET_NEXT_VARIABLE,
1234         EFI_SET_VARIABLE,
1235         EFI_QUERY_VARIABLE_INFO,
1236         EFI_GET_NEXT_HIGH_MONO_COUNT,
1237         EFI_RESET_SYSTEM,
1238         EFI_UPDATE_CAPSULE,
1239         EFI_QUERY_CAPSULE_CAPS,
1240 };
1241
1242 /*
1243  * efi_runtime_work:    Details of EFI Runtime Service work
1244  * @arg<1-5>:           EFI Runtime Service function arguments
1245  * @status:             Status of executing EFI Runtime Service
1246  * @efi_rts_id:         EFI Runtime Service function identifier
1247  * @efi_rts_comp:       Struct used for handling completions
1248  */
1249 struct efi_runtime_work {
1250         void *arg1;
1251         void *arg2;
1252         void *arg3;
1253         void *arg4;
1254         void *arg5;
1255         efi_status_t status;
1256         struct work_struct work;
1257         enum efi_rts_ids efi_rts_id;
1258         struct completion efi_rts_comp;
1259 };
1260
1261 extern struct efi_runtime_work efi_rts_work;
1262
1263 /* Workqueue to queue EFI Runtime Services */
1264 extern struct workqueue_struct *efi_rts_wq;
1265
1266 struct linux_efi_memreserve {
1267         int             size;                   // allocated size of the array
1268         atomic_t        count;                  // number of entries used
1269         phys_addr_t     next;                   // pa of next struct instance
1270         struct {
1271                 phys_addr_t     base;
1272                 phys_addr_t     size;
1273         } entry[];
1274 };
1275
1276 #define EFI_MEMRESERVE_COUNT(size) (((size) - sizeof(struct linux_efi_memreserve)) \
1277         / sizeof_field(struct linux_efi_memreserve, entry[0]))
1278
1279 void __init efi_arch_mem_reserve(phys_addr_t addr, u64 size);
1280
1281 char *efi_systab_show_arch(char *str);
1282
1283 /*
1284  * The LINUX_EFI_MOK_VARIABLE_TABLE_GUID config table can be provided
1285  * to the kernel by an EFI boot loader. The table contains a packed
1286  * sequence of these entries, one for each named MOK variable.
1287  * The sequence is terminated by an entry with a completely NULL
1288  * name and 0 data size.
1289  */
1290 struct efi_mokvar_table_entry {
1291         char name[256];
1292         u64 data_size;
1293         u8 data[];
1294 } __attribute((packed));
1295
1296 #ifdef CONFIG_LOAD_UEFI_KEYS
1297 extern void __init efi_mokvar_table_init(void);
1298 extern struct efi_mokvar_table_entry *efi_mokvar_entry_next(
1299                         struct efi_mokvar_table_entry **mokvar_entry);
1300 extern struct efi_mokvar_table_entry *efi_mokvar_entry_find(const char *name);
1301 #else
1302 static inline void efi_mokvar_table_init(void) { }
1303 static inline struct efi_mokvar_table_entry *efi_mokvar_entry_next(
1304                         struct efi_mokvar_table_entry **mokvar_entry)
1305 {
1306         return NULL;
1307 }
1308 static inline struct efi_mokvar_table_entry *efi_mokvar_entry_find(
1309                         const char *name)
1310 {
1311         return NULL;
1312 }
1313 #endif
1314
1315 extern void efifb_setup_from_dmi(struct screen_info *si, const char *opt);
1316
1317 struct linux_efi_coco_secret_area {
1318         u64     base_pa;
1319         u64     size;
1320 };
1321
1322 struct linux_efi_initrd {
1323         unsigned long   base;
1324         unsigned long   size;
1325 };
1326
1327 /* Header of a populated EFI secret area */
1328 #define EFI_SECRET_TABLE_HEADER_GUID    EFI_GUID(0x1e74f542, 0x71dd, 0x4d66,  0x96, 0x3e, 0xef, 0x42, 0x87, 0xff, 0x17, 0x3b)
1329
1330 bool xen_efi_config_table_is_usable(const efi_guid_t *guid, unsigned long table);
1331
1332 static inline
1333 bool efi_config_table_is_usable(const efi_guid_t *guid, unsigned long table)
1334 {
1335         if (!IS_ENABLED(CONFIG_XEN_EFI))
1336                 return true;
1337         return xen_efi_config_table_is_usable(guid, table);
1338 }
1339
1340 #endif /* _LINUX_EFI_H */