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 <drummond@valinux.com>
  11  * Copyright (C) 1999, 2002-2003 Hewlett-Packard Co.
  12  *      David Mosberger-Tang <davidm@hpl.hp.com>
  13  *      Stephane Eranian <eranian@hpl.hp.com>
  14  */
  15 #include <linux/init.h>
  16 #include <linux/string.h>
  17 #include <linux/time.h>
  18 #include <linux/types.h>
  19 #include <linux/proc_fs.h>
  20 #include <linux/rtc.h>
  21 #include <linux/ioport.h>
  22 #include <linux/pfn.h>
  23 #include <linux/pstore.h>
  24 #include <linux/range.h>
  25 #include <linux/reboot.h>
  26 #include <linux/uuid.h>
  27 #include <linux/screen_info.h>
  28
  29 #include <asm/page.h>
  30
  31 #define EFI_SUCCESS             0
  32 #define EFI_LOAD_ERROR          ( 1 | (1UL << (BITS_PER_LONG-1)))
  33 #define EFI_INVALID_PARAMETER   ( 2 | (1UL << (BITS_PER_LONG-1)))
  34 #define EFI_UNSUPPORTED         ( 3 | (1UL << (BITS_PER_LONG-1)))
  35 #define EFI_BAD_BUFFER_SIZE     ( 4 | (1UL << (BITS_PER_LONG-1)))
  36 #define EFI_BUFFER_TOO_SMALL    ( 5 | (1UL << (BITS_PER_LONG-1)))
  37 #define EFI_NOT_READY           ( 6 | (1UL << (BITS_PER_LONG-1)))
  38 #define EFI_DEVICE_ERROR        ( 7 | (1UL << (BITS_PER_LONG-1)))
  39 #define EFI_WRITE_PROTECTED     ( 8 | (1UL << (BITS_PER_LONG-1)))
  40 #define EFI_OUT_OF_RESOURCES    ( 9 | (1UL << (BITS_PER_LONG-1)))
  41 #define EFI_NOT_FOUND           (14 | (1UL << (BITS_PER_LONG-1)))
  42 #define EFI_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_GRAPHICS_OUTPUT_PROTOCOL_GUID       EFI_GUID(0x9042a9de, 0x23dc, 0x4a38,  0x96, 0xfb, 0x7a, 0xde, 0xd0, 0x80, 0x51, 0x6a)
 375 #define EFI_UGA_PROTOCOL_GUID                   EFI_GUID(0x982c298b, 0xf4fa, 0x41cb,  0xb8, 0x38, 0x77, 0xaa, 0x68, 0x8f, 0xb8, 0x39)
 376 #define EFI_PCI_IO_PROTOCOL_GUID                EFI_GUID(0x4cf5b200, 0x68b8, 0x4ca5,  0x9e, 0xec, 0xb2, 0x3e, 0x3f, 0x50, 0x02, 0x9a)
 377 #define EFI_FILE_INFO_ID                        EFI_GUID(0x09576e92, 0x6d3f, 0x11d2,  0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
 378 #define EFI_SYSTEM_RESOURCE_TABLE_GUID          EFI_GUID(0xb122a263, 0x3661, 0x4f68,  0x99, 0x29, 0x78, 0xf8, 0xb0, 0xd6, 0x21, 0x80)
 379 #define EFI_FILE_SYSTEM_GUID                    EFI_GUID(0x964e5b22, 0x6459, 0x11d2,  0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
 380 #define DEVICE_TREE_GUID                        EFI_GUID(0xb1b621d5, 0xf19c, 0x41a5,  0x83, 0x0b, 0xd9, 0x15, 0x2c, 0x69, 0xaa, 0xe0)
 381 #define EFI_PROPERTIES_TABLE_GUID               EFI_GUID(0x880aaca3, 0x4adc, 0x4a04,  0x90, 0x79, 0xb7, 0x47, 0x34, 0x08, 0x25, 0xe5)
 382 #define EFI_RNG_PROTOCOL_GUID                   EFI_GUID(0x3152bca5, 0xeade, 0x433d,  0x86, 0x2e, 0xc0, 0x1c, 0xdc, 0x29, 0x1f, 0x44)
 383 #define EFI_RNG_ALGORITHM_RAW                   EFI_GUID(0xe43176d7, 0xb6e8, 0x4827,  0xb7, 0x84, 0x7f, 0xfd, 0xc4, 0xb6, 0x85, 0x61)
 384 #define EFI_MEMORY_ATTRIBUTES_TABLE_GUID        EFI_GUID(0xdcfa911d, 0x26eb, 0x469f,  0xa2, 0x20, 0x38, 0xb7, 0xdc, 0x46, 0x12, 0x20)
 385 #define EFI_CONSOLE_OUT_DEVICE_GUID             EFI_GUID(0xd3b36f2c, 0xd551, 0x11d4,  0x9a, 0x46, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
 386 #define APPLE_PROPERTIES_PROTOCOL_GUID          EFI_GUID(0x91bd12fe, 0xf6c3, 0x44fb,  0xa5, 0xb7, 0x51, 0x22, 0xab, 0x30, 0x3a, 0xe0)
 387 #define EFI_TCG2_PROTOCOL_GUID                  EFI_GUID(0x607f766c, 0x7455, 0x42be,  0x93, 0x0b, 0xe4, 0xd7, 0x6d, 0xb2, 0x72, 0x0f)
 388 #define EFI_LOAD_FILE_PROTOCOL_GUID             EFI_GUID(0x56ec3091, 0x954c, 0x11d2,  0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
 389 #define EFI_LOAD_FILE2_PROTOCOL_GUID            EFI_GUID(0x4006c0c1, 0xfcb3, 0x403e,  0x99, 0x6d, 0x4a, 0x6c, 0x87, 0x24, 0xe0, 0x6d)
 390 #define EFI_RT_PROPERTIES_TABLE_GUID            EFI_GUID(0xeb66918a, 0x7eef, 0x402a,  0x84, 0x2e, 0x93, 0x1d, 0x21, 0xc3, 0x8a, 0xe9)
 391 #define EFI_DXE_SERVICES_TABLE_GUID             EFI_GUID(0x05ad34ba, 0x6f02, 0x4214,  0x95, 0x2e, 0x4d, 0xa0, 0x39, 0x8e, 0x2b, 0xb9)
 392 #define EFI_SMBIOS_PROTOCOL_GUID                EFI_GUID(0x03583ff6, 0xcb36, 0x4940,  0x94, 0x7e, 0xb9, 0xb3, 0x9f, 0x4a, 0xfa, 0xf7)
 393
 394 #define EFI_IMAGE_SECURITY_DATABASE_GUID        EFI_GUID(0xd719b2cb, 0x3d3a, 0x4596,  0xa3, 0xbc, 0xda, 0xd0, 0x0e, 0x67, 0x65, 0x6f)
 395 #define EFI_SHIM_LOCK_GUID                      EFI_GUID(0x605dab50, 0xe046, 0x4300,  0xab, 0xb6, 0x3d, 0xd8, 0x10, 0xdd, 0x8b, 0x23)
 396
 397 #define EFI_CERT_SHA256_GUID                    EFI_GUID(0xc1c41626, 0x504c, 0x4092, 0xac, 0xa9, 0x41, 0xf9, 0x36, 0x93, 0x43, 0x28)
 398 #define EFI_CERT_X509_GUID                      EFI_GUID(0xa5c059a1, 0x94e4, 0x4aa7, 0x87, 0xb5, 0xab, 0x15, 0x5c, 0x2b, 0xf0, 0x72)
 399 #define EFI_CERT_X509_SHA256_GUID               EFI_GUID(0x3bd2a492, 0x96c0, 0x4079, 0xb4, 0x20, 0xfc, 0xf9, 0x8e, 0xf1, 0x03, 0xed)
 400 #define EFI_CC_BLOB_GUID                        EFI_GUID(0x067b1f5f, 0xcf26, 0x44c5, 0x85, 0x54, 0x93, 0xd7, 0x77, 0x91, 0x2d, 0x42)
 401
 402 /*
 403  * This GUID is used to pass to the kernel proper the struct screen_info
 404  * structure that was populated by the stub based on the GOP protocol instance
 405  * associated with ConOut
 406  */
 407 #define LINUX_EFI_ARM_SCREEN_INFO_TABLE_GUID    EFI_GUID(0xe03fc20a, 0x85dc, 0x406e,  0xb9, 0x0e, 0x4a, 0xb5, 0x02, 0x37, 0x1d, 0x95)
 408 #define LINUX_EFI_ARM_CPU_STATE_TABLE_GUID      EFI_GUID(0xef79e4aa, 0x3c3d, 0x4989,  0xb9, 0x02, 0x07, 0xa9, 0x43, 0xe5, 0x50, 0xd2)
 409 #define LINUX_EFI_LOADER_ENTRY_GUID             EFI_GUID(0x4a67b082, 0x0a4c, 0x41cf,  0xb6, 0xc7, 0x44, 0x0b, 0x29, 0xbb, 0x8c, 0x4f)
 410 #define LINUX_EFI_RANDOM_SEED_TABLE_GUID        EFI_GUID(0x1ce1e5bc, 0x7ceb, 0x42f2,  0x81, 0xe5, 0x8a, 0xad, 0xf1, 0x80, 0xf5, 0x7b)
 411 #define LINUX_EFI_TPM_EVENT_LOG_GUID            EFI_GUID(0xb7799cb0, 0xeca2, 0x4943,  0x96, 0x67, 0x1f, 0xae, 0x07, 0xb7, 0x47, 0xfa)
 412 #define LINUX_EFI_TPM_FINAL_LOG_GUID            EFI_GUID(0x1e2ed096, 0x30e2, 0x4254,  0xbd, 0x89, 0x86, 0x3b, 0xbe, 0xf8, 0x23, 0x25)
 413 #define LINUX_EFI_MEMRESERVE_TABLE_GUID         EFI_GUID(0x888eb0c6, 0x8ede, 0x4ff5,  0xa8, 0xf0, 0x9a, 0xee, 0x5c, 0xb9, 0x77, 0xc2)
 414 #define LINUX_EFI_INITRD_MEDIA_GUID             EFI_GUID(0x5568e427, 0x68fc, 0x4f3d,  0xac, 0x74, 0xca, 0x55, 0x52, 0x31, 0xcc, 0x68)
 415 #define LINUX_EFI_ZBOOT_MEDIA_GUID              EFI_GUID(0xe565a30d, 0x47da, 0x4dbd,  0xb3, 0x54, 0x9b, 0xb5, 0xc8, 0x4f, 0x8b, 0xe2)
 416 #define LINUX_EFI_MOK_VARIABLE_TABLE_GUID       EFI_GUID(0xc451ed2b, 0x9694, 0x45d3,  0xba, 0xba, 0xed, 0x9f, 0x89, 0x88, 0xa3, 0x89)
 417 #define LINUX_EFI_COCO_SECRET_AREA_GUID         EFI_GUID(0xadf956ad, 0xe98c, 0x484c,  0xae, 0x11, 0xb5, 0x1c, 0x7d, 0x33, 0x64, 0x47)
 418 #define LINUX_EFI_BOOT_MEMMAP_GUID              EFI_GUID(0x800f683f, 0xd08b, 0x423a,  0xa2, 0x93, 0x96, 0x5c, 0x3c, 0x6f, 0xe2, 0xb4)
 419
 420 #define RISCV_EFI_BOOT_PROTOCOL_GUID            EFI_GUID(0xccd15fec, 0x6f73, 0x4eec,  0x83, 0x95, 0x3e, 0x69, 0xe4, 0xb9, 0x40, 0xbf)
 421
 422 /*
 423  * This GUID may be installed onto the kernel image's handle as a NULL protocol
 424  * to signal to the stub that the placement of the image should be respected,
 425  * and moving the image in physical memory is undesirable. To ensure
 426  * compatibility with 64k pages kernels with virtually mapped stacks, and to
 427  * avoid defeating physical randomization, this protocol should only be
 428  * installed if the image was placed at a randomized 128k aligned address in
 429  * memory.
 430  */
 431 #define LINUX_EFI_LOADED_IMAGE_FIXED_GUID       EFI_GUID(0xf5a37b6d, 0x3344, 0x42a5,  0xb6, 0xbb, 0x97, 0x86, 0x48, 0xc1, 0x89, 0x0a)
 432
 433 /* OEM GUIDs */
 434 #define DELLEMC_EFI_RCI2_TABLE_GUID             EFI_GUID(0x2d9f28a2, 0xa886, 0x456a,  0x97, 0xa8, 0xf1, 0x1e, 0xf2, 0x4f, 0xf4, 0x55)
 435 #define AMD_SEV_MEM_ENCRYPT_GUID                EFI_GUID(0x0cf29b71, 0x9e51, 0x433a,  0xa3, 0xb7, 0x81, 0xf3, 0xab, 0x16, 0xb8, 0x75)
 436
 437 typedef struct {
 438         efi_guid_t guid;
 439         u64 table;
 440 } efi_config_table_64_t;
 441
 442 typedef struct {
 443         efi_guid_t guid;
 444         u32 table;
 445 } efi_config_table_32_t;
 446
 447 typedef union {
 448         struct {
 449                 efi_guid_t guid;
 450                 void *table;
 451         };
 452         efi_config_table_32_t mixed_mode;
 453 } efi_config_table_t;
 454
 455 typedef struct {
 456         efi_guid_t guid;
 457         unsigned long *ptr;
 458         const char name[16];
 459 } efi_config_table_type_t;
 460
 461 #define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL)
 462 #define EFI_DXE_SERVICES_TABLE_SIGNATURE ((u64)0x565245535f455844ULL)
 463
 464 #define EFI_2_30_SYSTEM_TABLE_REVISION  ((2 << 16) | (30))
 465 #define EFI_2_20_SYSTEM_TABLE_REVISION  ((2 << 16) | (20))
 466 #define EFI_2_10_SYSTEM_TABLE_REVISION  ((2 << 16) | (10))
 467 #define EFI_2_00_SYSTEM_TABLE_REVISION  ((2 << 16) | (00))
 468 #define EFI_1_10_SYSTEM_TABLE_REVISION  ((1 << 16) | (10))
 469 #define EFI_1_02_SYSTEM_TABLE_REVISION  ((1 << 16) | (02))
 470
 471 typedef struct {
 472         efi_table_hdr_t hdr;
 473         u64 fw_vendor;  /* physical addr of CHAR16 vendor string */
 474         u32 fw_revision;
 475         u32 __pad1;
 476         u64 con_in_handle;
 477         u64 con_in;
 478         u64 con_out_handle;
 479         u64 con_out;
 480         u64 stderr_handle;
 481         u64 stderr;
 482         u64 runtime;
 483         u64 boottime;
 484         u32 nr_tables;
 485         u32 __pad2;
 486         u64 tables;
 487 } efi_system_table_64_t;
 488
 489 typedef struct {
 490         efi_table_hdr_t hdr;
 491         u32 fw_vendor;  /* physical addr of CHAR16 vendor string */
 492         u32 fw_revision;
 493         u32 con_in_handle;
 494         u32 con_in;
 495         u32 con_out_handle;
 496         u32 con_out;
 497         u32 stderr_handle;
 498         u32 stderr;
 499         u32 runtime;
 500         u32 boottime;
 501         u32 nr_tables;
 502         u32 tables;
 503 } efi_system_table_32_t;
 504
 505 typedef union efi_simple_text_input_protocol efi_simple_text_input_protocol_t;
 506 typedef union efi_simple_text_output_protocol efi_simple_text_output_protocol_t;
 507
 508 typedef union {
 509         struct {
 510                 efi_table_hdr_t hdr;
 511                 unsigned long fw_vendor;        /* physical addr of CHAR16 vendor string */
 512                 u32 fw_revision;
 513                 unsigned long con_in_handle;
 514                 efi_simple_text_input_protocol_t *con_in;
 515                 unsigned long con_out_handle;
 516                 efi_simple_text_output_protocol_t *con_out;
 517                 unsigned long stderr_handle;
 518                 unsigned long stderr;
 519                 efi_runtime_services_t *runtime;
 520                 efi_boot_services_t *boottime;
 521                 unsigned long nr_tables;
 522                 unsigned long tables;
 523         };
 524         efi_system_table_32_t mixed_mode;
 525 } efi_system_table_t;
 526
 527 struct efi_boot_memmap {
 528         unsigned long           map_size;
 529         unsigned long           desc_size;
 530         u32                     desc_ver;
 531         unsigned long           map_key;
 532         unsigned long           buff_size;
 533         efi_memory_desc_t       map[];
 534 };
 535
 536 /*
 537  * Architecture independent structure for describing a memory map for the
 538  * benefit of efi_memmap_init_early(), and for passing context between
 539  * efi_memmap_alloc() and efi_memmap_install().
 540  */
 541 struct efi_memory_map_data {
 542         phys_addr_t phys_map;
 543         unsigned long size;
 544         unsigned long desc_version;
 545         unsigned long desc_size;
 546         unsigned long flags;
 547 };
 548
 549 struct efi_memory_map {
 550         phys_addr_t phys_map;
 551         void *map;
 552         void *map_end;
 553         int nr_map;
 554         unsigned long desc_version;
 555         unsigned long desc_size;
 556 #define EFI_MEMMAP_LATE (1UL << 0)
 557 #define EFI_MEMMAP_MEMBLOCK (1UL << 1)
 558 #define EFI_MEMMAP_SLAB (1UL << 2)
 559         unsigned long flags;
 560 };
 561
 562 struct efi_mem_range {
 563         struct range range;
 564         u64 attribute;
 565 };
 566
 567 typedef struct {
 568         u32 version;
 569         u32 length;
 570         u64 memory_protection_attribute;
 571 } efi_properties_table_t;
 572
 573 #define EFI_PROPERTIES_TABLE_VERSION    0x00010000
 574 #define EFI_PROPERTIES_RUNTIME_MEMORY_PROTECTION_NON_EXECUTABLE_PE_DATA 0x1
 575
 576 typedef struct {
 577         u16 version;
 578         u16 length;
 579         u32 runtime_services_supported;
 580 } efi_rt_properties_table_t;
 581
 582 #define EFI_RT_PROPERTIES_TABLE_VERSION 0x1
 583
 584 #define EFI_INVALID_TABLE_ADDR          (~0UL)
 585
 586 typedef struct {
 587         u32 version;
 588         u32 num_entries;
 589         u32 desc_size;
 590         u32 reserved;
 591         efi_memory_desc_t entry[0];
 592 } efi_memory_attributes_table_t;
 593
 594 typedef struct {
 595         efi_guid_t signature_owner;
 596         u8 signature_data[];
 597 } efi_signature_data_t;
 598
 599 typedef struct {
 600         efi_guid_t signature_type;
 601         u32 signature_list_size;
 602         u32 signature_header_size;
 603         u32 signature_size;
 604         u8 signature_header[];
 605         /* efi_signature_data_t signatures[][] */
 606 } efi_signature_list_t;
 607
 608 typedef u8 efi_sha256_hash_t[32];
 609
 610 typedef struct {
 611         efi_sha256_hash_t to_be_signed_hash;
 612         efi_time_t time_of_revocation;
 613 } efi_cert_x509_sha256_t;
 614
 615 extern unsigned long __ro_after_init efi_rng_seed;              /* RNG Seed table */
 616
 617 /*
 618  * All runtime access to EFI goes through this structure:
 619  */
 620 extern struct efi {
 621         const efi_runtime_services_t    *runtime;               /* EFI runtime services table */
 622         unsigned int                    runtime_version;        /* Runtime services version */
 623         unsigned int                    runtime_supported_mask;
 624
 625         unsigned long                   acpi;                   /* ACPI table  (IA64 ext 0.71) */
 626         unsigned long                   acpi20;                 /* ACPI table  (ACPI 2.0) */
 627         unsigned long                   smbios;                 /* SMBIOS table (32 bit entry point) */
 628         unsigned long                   smbios3;                /* SMBIOS table (64 bit entry point) */
 629         unsigned long                   esrt;                   /* ESRT table */
 630         unsigned long                   tpm_log;                /* TPM2 Event Log table */
 631         unsigned long                   tpm_final_log;          /* TPM2 Final Events Log table */
 632         unsigned long                   mokvar_table;           /* MOK variable config table */
 633         unsigned long                   coco_secret;            /* Confidential computing secret table */
 634
 635         efi_get_time_t                  *get_time;
 636         efi_set_time_t                  *set_time;
 637         efi_get_wakeup_time_t           *get_wakeup_time;
 638         efi_set_wakeup_time_t           *set_wakeup_time;
 639         efi_get_variable_t              *get_variable;
 640         efi_get_next_variable_t         *get_next_variable;
 641         efi_set_variable_t              *set_variable;
 642         efi_set_variable_t              *set_variable_nonblocking;
 643         efi_query_variable_info_t       *query_variable_info;
 644         efi_query_variable_info_t       *query_variable_info_nonblocking;
 645         efi_update_capsule_t            *update_capsule;
 646         efi_query_capsule_caps_t        *query_capsule_caps;
 647         efi_get_next_high_mono_count_t  *get_next_high_mono_count;
 648         efi_reset_system_t              *reset_system;
 649
 650         struct efi_memory_map           memmap;
 651         unsigned long                   flags;
 652 } efi;
 653
 654 #define EFI_RT_SUPPORTED_GET_TIME                               0x0001
 655 #define EFI_RT_SUPPORTED_SET_TIME                               0x0002
 656 #define EFI_RT_SUPPORTED_GET_WAKEUP_TIME                        0x0004
 657 #define EFI_RT_SUPPORTED_SET_WAKEUP_TIME                        0x0008
 658 #define EFI_RT_SUPPORTED_GET_VARIABLE                           0x0010
 659 #define EFI_RT_SUPPORTED_GET_NEXT_VARIABLE_NAME                 0x0020
 660 #define EFI_RT_SUPPORTED_SET_VARIABLE                           0x0040
 661 #define EFI_RT_SUPPORTED_SET_VIRTUAL_ADDRESS_MAP                0x0080
 662 #define EFI_RT_SUPPORTED_CONVERT_POINTER                        0x0100
 663 #define EFI_RT_SUPPORTED_GET_NEXT_HIGH_MONOTONIC_COUNT          0x0200
 664 #define EFI_RT_SUPPORTED_RESET_SYSTEM                           0x0400
 665 #define EFI_RT_SUPPORTED_UPDATE_CAPSULE                         0x0800
 666 #define EFI_RT_SUPPORTED_QUERY_CAPSULE_CAPABILITIES             0x1000
 667 #define EFI_RT_SUPPORTED_QUERY_VARIABLE_INFO                    0x2000
 668
 669 #define EFI_RT_SUPPORTED_ALL                                    0x3fff
 670
 671 #define EFI_RT_SUPPORTED_TIME_SERVICES                          0x000f
 672 #define EFI_RT_SUPPORTED_VARIABLE_SERVICES                      0x0070
 673
 674 extern struct mm_struct efi_mm;
 675
 676 static inline int
 677 efi_guidcmp (efi_guid_t left, efi_guid_t right)
 678 {
 679         return memcmp(&left, &right, sizeof (efi_guid_t));
 680 }
 681
 682 static inline char *
 683 efi_guid_to_str(efi_guid_t *guid, char *out)
 684 {
 685         sprintf(out, "%pUl", guid->b);
 686         return out;
 687 }
 688
 689 extern void efi_init (void);
 690 #ifdef CONFIG_EFI
 691 extern void efi_enter_virtual_mode (void);      /* switch EFI to virtual mode, if possible */
 692 #else
 693 static inline void efi_enter_virtual_mode (void) {}
 694 #endif
 695 #ifdef CONFIG_X86
 696 extern efi_status_t efi_query_variable_store(u32 attributes,
 697                                              unsigned long size,
 698                                              bool nonblocking);
 699 #else
 700
 701 static inline efi_status_t efi_query_variable_store(u32 attributes,
 702                                                     unsigned long size,
 703                                                     bool nonblocking)
 704 {
 705         return EFI_SUCCESS;
 706 }
 707 #endif
 708 extern void __iomem *efi_lookup_mapped_addr(u64 phys_addr);
 709
 710 extern int __init efi_memmap_alloc(unsigned int num_entries,
 711                                    struct efi_memory_map_data *data);
 712 extern void __efi_memmap_free(u64 phys, unsigned long size,
 713                               unsigned long flags);
 714 extern int __init efi_memmap_init_early(struct efi_memory_map_data *data);
 715 extern int __init efi_memmap_init_late(phys_addr_t addr, unsigned long size);
 716 extern void __init efi_memmap_unmap(void);
 717 extern int __init efi_memmap_install(struct efi_memory_map_data *data);
 718 extern int __init efi_memmap_split_count(efi_memory_desc_t *md,
 719                                          struct range *range);
 720 extern void __init efi_memmap_insert(struct efi_memory_map *old_memmap,
 721                                      void *buf, struct efi_mem_range *mem);
 722
 723 #ifdef CONFIG_EFI_ESRT
 724 extern void __init efi_esrt_init(void);
 725 #else
 726 static inline void efi_esrt_init(void) { }
 727 #endif
 728 extern int efi_config_parse_tables(const efi_config_table_t *config_tables,
 729                                    int count,
 730                                    const efi_config_table_type_t *arch_tables);
 731 extern int efi_systab_check_header(const efi_table_hdr_t *systab_hdr,
 732                                    int min_major_version);
 733 extern void efi_systab_report_header(const efi_table_hdr_t *systab_hdr,
 734                                      unsigned long fw_vendor);
 735 extern u64 efi_get_iobase (void);
 736 extern int efi_mem_type(unsigned long phys_addr);
 737 extern u64 efi_mem_attributes (unsigned long phys_addr);
 738 extern u64 efi_mem_attribute (unsigned long phys_addr, unsigned long size);
 739 extern int __init efi_uart_console_only (void);
 740 extern u64 efi_mem_desc_end(efi_memory_desc_t *md);
 741 extern int efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md);
 742 extern void efi_mem_reserve(phys_addr_t addr, u64 size);
 743 extern int efi_mem_reserve_persistent(phys_addr_t addr, u64 size);
 744 extern void efi_initialize_iomem_resources(struct resource *code_resource,
 745                 struct resource *data_resource, struct resource *bss_resource);
 746 extern u64 efi_get_fdt_params(struct efi_memory_map_data *data);
 747 extern struct kobject *efi_kobj;
 748
 749 extern int efi_reboot_quirk_mode;
 750 extern bool efi_poweroff_required(void);
 751
 752 #ifdef CONFIG_EFI_FAKE_MEMMAP
 753 extern void __init efi_fake_memmap(void);
 754 #else
 755 static inline void efi_fake_memmap(void) { }
 756 #endif
 757
 758 extern unsigned long efi_mem_attr_table;
 759
 760 /*
 761  * efi_memattr_perm_setter - arch specific callback function passed into
 762  *                           efi_memattr_apply_permissions() that updates the
 763  *                           mapping permissions described by the second
 764  *                           argument in the page tables referred to by the
 765  *                           first argument.
 766  */
 767 typedef int (*efi_memattr_perm_setter)(struct mm_struct *, efi_memory_desc_t *);
 768
 769 extern int efi_memattr_init(void);
 770 extern int efi_memattr_apply_permissions(struct mm_struct *mm,
 771                                          efi_memattr_perm_setter fn);
 772
 773 /*
 774  * efi_early_memdesc_ptr - get the n-th EFI memmap descriptor
 775  * @map: the start of efi memmap
 776  * @desc_size: the size of space for each EFI memmap descriptor
 777  * @n: the index of efi memmap descriptor
 778  *
 779  * EFI boot service provides the GetMemoryMap() function to get a copy of the
 780  * current memory map which is an array of memory descriptors, each of
 781  * which describes a contiguous block of memory. It also gets the size of the
 782  * map, and the size of each descriptor, etc.
 783  *
 784  * Note that per section 6.2 of UEFI Spec 2.6 Errata A, the returned size of
 785  * each descriptor might not be equal to sizeof(efi_memory_memdesc_t),
 786  * since efi_memory_memdesc_t may be extended in the future. Thus the OS
 787  * MUST use the returned size of the descriptor to find the start of each
 788  * efi_memory_memdesc_t in the memory map array. This should only be used
 789  * during bootup since for_each_efi_memory_desc_xxx() is available after the
 790  * kernel initializes the EFI subsystem to set up struct efi_memory_map.
 791  */
 792 #define efi_early_memdesc_ptr(map, desc_size, n)                        \
 793         (efi_memory_desc_t *)((void *)(map) + ((n) * (desc_size)))
 794
 795 /* Iterate through an efi_memory_map */
 796 #define for_each_efi_memory_desc_in_map(m, md)                             \
 797         for ((md) = (m)->map;                                              \
 798              (md) && ((void *)(md) + (m)->desc_size) <= (m)->map_end;      \
 799              (md) = (void *)(md) + (m)->desc_size)
 800
 801 /**
 802  * for_each_efi_memory_desc - iterate over descriptors in efi.memmap
 803  * @md: the efi_memory_desc_t * iterator
 804  *
 805  * Once the loop finishes @md must not be accessed.
 806  */
 807 #define for_each_efi_memory_desc(md) \
 808         for_each_efi_memory_desc_in_map(&efi.memmap, md)
 809
 810 /*
 811  * Format an EFI memory descriptor's type and attributes to a user-provided
 812  * character buffer, as per snprintf(), and return the buffer.
 813  */
 814 char * __init efi_md_typeattr_format(char *buf, size_t size,
 815                                      const efi_memory_desc_t *md);
 816
 817
 818 typedef void (*efi_element_handler_t)(const char *source,
 819                                       const void *element_data,
 820                                       size_t element_size);
 821 extern int __init parse_efi_signature_list(
 822         const char *source,
 823         const void *data, size_t size,
 824         efi_element_handler_t (*get_handler_for_guid)(const efi_guid_t *));
 825
 826 /**
 827  * efi_range_is_wc - check the WC bit on an address range
 828  * @start: starting kvirt address
 829  * @len: length of range
 830  *
 831  * Consult the EFI memory map and make sure it's ok to set this range WC.
 832  * Returns true or false.
 833  */
 834 static inline int efi_range_is_wc(unsigned long start, unsigned long len)
 835 {
 836         unsigned long i;
 837
 838         for (i = 0; i < len; i += (1UL << EFI_PAGE_SHIFT)) {
 839                 unsigned long paddr = __pa(start + i);
 840                 if (!(efi_mem_attributes(paddr) & EFI_MEMORY_WC))
 841                         return 0;
 842         }
 843         /* The range checked out */
 844         return 1;
 845 }
 846
 847 #ifdef CONFIG_EFI_PCDP
 848 extern int __init efi_setup_pcdp_console(char *);
 849 #endif
 850
 851 /*
 852  * We play games with efi_enabled so that the compiler will, if
 853  * possible, remove EFI-related code altogether.
 854  */
 855 #define EFI_BOOT                0       /* Were we booted from EFI? */
 856 #define EFI_CONFIG_TABLES       2       /* Can we use EFI config tables? */
 857 #define EFI_RUNTIME_SERVICES    3       /* Can we use runtime services? */
 858 #define EFI_MEMMAP              4       /* Can we use EFI memory map? */
 859 #define EFI_64BIT               5       /* Is the firmware 64-bit? */
 860 #define EFI_PARAVIRT            6       /* Access is via a paravirt interface */
 861 #define EFI_ARCH_1              7       /* First arch-specific bit */
 862 #define EFI_DBG                 8       /* Print additional debug info at runtime */
 863 #define EFI_NX_PE_DATA          9       /* Can runtime data regions be mapped non-executable? */
 864 #define EFI_MEM_ATTR            10      /* Did firmware publish an EFI_MEMORY_ATTRIBUTES table? */
 865 #define EFI_MEM_NO_SOFT_RESERVE 11      /* Is the kernel configured to ignore soft reservations? */
 866 #define EFI_PRESERVE_BS_REGIONS 12      /* Are EFI boot-services memory segments available? */
 867
 868 #ifdef CONFIG_EFI
 869 /*
 870  * Test whether the above EFI_* bits are enabled.
 871  */
 872 static inline bool efi_enabled(int feature)
 873 {
 874         return test_bit(feature, &efi.flags) != 0;
 875 }
 876 extern void efi_reboot(enum reboot_mode reboot_mode, const char *__unused);
 877
 878 bool __pure __efi_soft_reserve_enabled(void);
 879
 880 static inline bool __pure efi_soft_reserve_enabled(void)
 881 {
 882         return IS_ENABLED(CONFIG_EFI_SOFT_RESERVE)
 883                 && __efi_soft_reserve_enabled();
 884 }
 885
 886 static inline bool efi_rt_services_supported(unsigned int mask)
 887 {
 888         return (efi.runtime_supported_mask & mask) == mask;
 889 }
 890 extern void efi_find_mirror(void);
 891 #else
 892 static inline bool efi_enabled(int feature)
 893 {
 894         return false;
 895 }
 896 static inline void
 897 efi_reboot(enum reboot_mode reboot_mode, const char *__unused) {}
 898
 899 static inline bool efi_soft_reserve_enabled(void)
 900 {
 901         return false;
 902 }
 903
 904 static inline bool efi_rt_services_supported(unsigned int mask)
 905 {
 906         return false;
 907 }
 908
 909 static inline void efi_find_mirror(void) {}
 910 #endif
 911
 912 extern int efi_status_to_err(efi_status_t status);
 913
 914 /*
 915  * Variable Attributes
 916  */
 917 #define EFI_VARIABLE_NON_VOLATILE       0x0000000000000001
 918 #define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
 919 #define EFI_VARIABLE_RUNTIME_ACCESS     0x0000000000000004
 920 #define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008
 921 #define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010
 922 #define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020
 923 #define EFI_VARIABLE_APPEND_WRITE       0x0000000000000040
 924
 925 #define EFI_VARIABLE_MASK       (EFI_VARIABLE_NON_VOLATILE | \
 926                                 EFI_VARIABLE_BOOTSERVICE_ACCESS | \
 927                                 EFI_VARIABLE_RUNTIME_ACCESS | \
 928                                 EFI_VARIABLE_HARDWARE_ERROR_RECORD | \
 929                                 EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \
 930                                 EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \
 931                                 EFI_VARIABLE_APPEND_WRITE)
 932 /*
 933  * Length of a GUID string (strlen("aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee"))
 934  * not including trailing NUL
 935  */
 936 #define EFI_VARIABLE_GUID_LEN   UUID_STRING_LEN
 937
 938 /*
 939  * EFI Device Path information
 940  */
 941 #define EFI_DEV_HW                      0x01
 942 #define  EFI_DEV_PCI                             1
 943 #define  EFI_DEV_PCCARD                          2
 944 #define  EFI_DEV_MEM_MAPPED                      3
 945 #define  EFI_DEV_VENDOR                          4
 946 #define  EFI_DEV_CONTROLLER                      5
 947 #define EFI_DEV_ACPI                    0x02
 948 #define   EFI_DEV_BASIC_ACPI                     1
 949 #define   EFI_DEV_EXPANDED_ACPI                  2
 950 #define EFI_DEV_MSG                     0x03
 951 #define   EFI_DEV_MSG_ATAPI                      1
 952 #define   EFI_DEV_MSG_SCSI                       2
 953 #define   EFI_DEV_MSG_FC                         3
 954 #define   EFI_DEV_MSG_1394                       4
 955 #define   EFI_DEV_MSG_USB                        5
 956 #define   EFI_DEV_MSG_USB_CLASS                 15
 957 #define   EFI_DEV_MSG_I20                        6
 958 #define   EFI_DEV_MSG_MAC                       11
 959 #define   EFI_DEV_MSG_IPV4                      12
 960 #define   EFI_DEV_MSG_IPV6                      13
 961 #define   EFI_DEV_MSG_INFINIBAND                 9
 962 #define   EFI_DEV_MSG_UART                      14
 963 #define   EFI_DEV_MSG_VENDOR                    10
 964 #define EFI_DEV_MEDIA                   0x04
 965 #define   EFI_DEV_MEDIA_HARD_DRIVE               1
 966 #define   EFI_DEV_MEDIA_CDROM                    2
 967 #define   EFI_DEV_MEDIA_VENDOR                   3
 968 #define   EFI_DEV_MEDIA_FILE                     4
 969 #define   EFI_DEV_MEDIA_PROTOCOL                 5
 970 #define   EFI_DEV_MEDIA_REL_OFFSET               8
 971 #define EFI_DEV_BIOS_BOOT               0x05
 972 #define EFI_DEV_END_PATH                0x7F
 973 #define EFI_DEV_END_PATH2               0xFF
 974 #define   EFI_DEV_END_INSTANCE                  0x01
 975 #define   EFI_DEV_END_ENTIRE                    0xFF
 976
 977 struct efi_generic_dev_path {
 978         u8                              type;
 979         u8                              sub_type;
 980         u16                             length;
 981 } __packed;
 982
 983 struct efi_acpi_dev_path {
 984         struct efi_generic_dev_path     header;
 985         u32                             hid;
 986         u32                             uid;
 987 } __packed;
 988
 989 struct efi_pci_dev_path {
 990         struct efi_generic_dev_path     header;
 991         u8                              fn;
 992         u8                              dev;
 993 } __packed;
 994
 995 struct efi_vendor_dev_path {
 996         struct efi_generic_dev_path     header;
 997         efi_guid_t                      vendorguid;
 998         u8                              vendordata[];
 999 } __packed;
1000
1001 struct efi_rel_offset_dev_path {
1002         struct efi_generic_dev_path     header;
1003         u32                             reserved;
1004         u64                             starting_offset;
1005         u64                             ending_offset;
1006 } __packed;
1007
1008 struct efi_mem_mapped_dev_path {
1009         struct efi_generic_dev_path     header;
1010         u32                             memory_type;
1011         u64                             starting_addr;
1012         u64                             ending_addr;
1013 } __packed;
1014
1015 struct efi_dev_path {
1016         union {
1017                 struct efi_generic_dev_path     header;
1018                 struct efi_acpi_dev_path        acpi;
1019                 struct efi_pci_dev_path         pci;
1020                 struct efi_vendor_dev_path      vendor;
1021                 struct efi_rel_offset_dev_path  rel_offset;
1022         };
1023 } __packed;
1024
1025 struct device *efi_get_device_by_path(const struct efi_dev_path **node,
1026                                       size_t *len);
1027
1028 static inline void memrange_efi_to_native(u64 *addr, u64 *npages)
1029 {
1030         *npages = PFN_UP(*addr + (*npages<<EFI_PAGE_SHIFT)) - PFN_DOWN(*addr);
1031         *addr &= PAGE_MASK;
1032 }
1033
1034 /*
1035  * EFI Variable support.
1036  *
1037  * Different firmware drivers can expose their EFI-like variables using
1038  * the following.
1039  */
1040
1041 struct efivar_operations {
1042         efi_get_variable_t *get_variable;
1043         efi_get_next_variable_t *get_next_variable;
1044         efi_set_variable_t *set_variable;
1045         efi_set_variable_t *set_variable_nonblocking;
1046         efi_query_variable_store_t *query_variable_store;
1047 };
1048
1049 struct efivars {
1050         struct kset *kset;
1051         struct kobject *kobject;
1052         const struct efivar_operations *ops;
1053 };
1054
1055 /*
1056  * The maximum size of VariableName + Data = 1024
1057  * Therefore, it's reasonable to save that much
1058  * space in each part of the structure,
1059  * and we use a page for reading/writing.
1060  */
1061
1062 #define EFI_VAR_NAME_LEN        1024
1063
1064 int efivars_register(struct efivars *efivars,
1065                      const struct efivar_operations *ops,
1066                      struct kobject *kobject);
1067 int efivars_unregister(struct efivars *efivars);
1068 struct kobject *efivars_kobject(void);
1069
1070 int 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_RUNTIME_MAP
1102 int efi_runtime_map_init(struct kobject *);
1103 int efi_get_runtime_map_size(void);
1104 int efi_get_runtime_map_desc_size(void);
1105 int efi_runtime_map_copy(void *buf, size_t bufsz);
1106 #else
1107 static inline int efi_runtime_map_init(struct kobject *kobj)
1108 {
1109         return 0;
1110 }
1111
1112 static inline int efi_get_runtime_map_size(void)
1113 {
1114         return 0;
1115 }
1116
1117 static inline int efi_get_runtime_map_desc_size(void)
1118 {
1119         return 0;
1120 }
1121
1122 static inline int efi_runtime_map_copy(void *buf, size_t bufsz)
1123 {
1124         return 0;
1125 }
1126
1127 #endif
1128
1129 #ifdef CONFIG_EFI
1130 extern bool efi_runtime_disabled(void);
1131 #else
1132 static inline bool efi_runtime_disabled(void) { return true; }
1133 #endif
1134
1135 extern void efi_call_virt_check_flags(unsigned long flags, const char *call);
1136 extern unsigned long efi_call_virt_save_flags(void);
1137
1138 enum efi_secureboot_mode {
1139         efi_secureboot_mode_unset,
1140         efi_secureboot_mode_unknown,
1141         efi_secureboot_mode_disabled,
1142         efi_secureboot_mode_enabled,
1143 };
1144
1145 static inline
1146 enum efi_secureboot_mode efi_get_secureboot_mode(efi_get_variable_t *get_var)
1147 {
1148         u8 secboot, setupmode = 0;
1149         efi_status_t status;
1150         unsigned long size;
1151
1152         size = sizeof(secboot);
1153         status = get_var(L"SecureBoot", &EFI_GLOBAL_VARIABLE_GUID, NULL, &size,
1154                          &secboot);
1155         if (status == EFI_NOT_FOUND)
1156                 return efi_secureboot_mode_disabled;
1157         if (status != EFI_SUCCESS)
1158                 return efi_secureboot_mode_unknown;
1159
1160         size = sizeof(setupmode);
1161         get_var(L"SetupMode", &EFI_GLOBAL_VARIABLE_GUID, NULL, &size, &setupmode);
1162         if (secboot == 0 || setupmode == 1)
1163                 return efi_secureboot_mode_disabled;
1164         return efi_secureboot_mode_enabled;
1165 }
1166
1167 #ifdef CONFIG_EFI_EMBEDDED_FIRMWARE
1168 void efi_check_for_embedded_firmwares(void);
1169 #else
1170 static inline void efi_check_for_embedded_firmwares(void) { }
1171 #endif
1172
1173 efi_status_t efi_random_get_seed(void);
1174
1175 #define arch_efi_call_virt(p, f, args...)       ((p)->f(args))
1176
1177 /*
1178  * Arch code can implement the following three template macros, avoiding
1179  * reptition for the void/non-void return cases of {__,}efi_call_virt():
1180  *
1181  *  * arch_efi_call_virt_setup()
1182  *
1183  *    Sets up the environment for the call (e.g. switching page tables,
1184  *    allowing kernel-mode use of floating point, if required).
1185  *
1186  *  * arch_efi_call_virt()
1187  *
1188  *    Performs the call. The last expression in the macro must be the call
1189  *    itself, allowing the logic to be shared by the void and non-void
1190  *    cases.
1191  *
1192  *  * arch_efi_call_virt_teardown()
1193  *
1194  *    Restores the usual kernel environment once the call has returned.
1195  */
1196
1197 #define efi_call_virt_pointer(p, f, args...)                            \
1198 ({                                                                      \
1199         efi_status_t __s;                                               \
1200         unsigned long __flags;                                          \
1201                                                                         \
1202         arch_efi_call_virt_setup();                                     \
1203                                                                         \
1204         __flags = efi_call_virt_save_flags();                           \
1205         __s = arch_efi_call_virt(p, f, args);                           \
1206         efi_call_virt_check_flags(__flags, __stringify(f));             \
1207                                                                         \
1208         arch_efi_call_virt_teardown();                                  \
1209                                                                         \
1210         __s;                                                            \
1211 })
1212
1213 #define __efi_call_virt_pointer(p, f, args...)                          \
1214 ({                                                                      \
1215         unsigned long __flags;                                          \
1216                                                                         \
1217         arch_efi_call_virt_setup();                                     \
1218                                                                         \
1219         __flags = efi_call_virt_save_flags();                           \
1220         arch_efi_call_virt(p, f, args);                                 \
1221         efi_call_virt_check_flags(__flags, __stringify(f));             \
1222                                                                         \
1223         arch_efi_call_virt_teardown();                                  \
1224 })
1225
1226 #define EFI_RANDOM_SEED_SIZE            32U // BLAKE2S_HASH_SIZE
1227
1228 struct linux_efi_random_seed {
1229         u32     size;
1230         u8      bits[];
1231 };
1232
1233 struct linux_efi_tpm_eventlog {
1234         u32     size;
1235         u32     final_events_preboot_size;
1236         u8      version;
1237         u8      log[];
1238 };
1239
1240 extern int efi_tpm_eventlog_init(void);
1241
1242 struct efi_tcg2_final_events_table {
1243         u64 version;
1244         u64 nr_events;
1245         u8 events[];
1246 };
1247 extern int efi_tpm_final_log_size;
1248
1249 extern unsigned long rci2_table_phys;
1250
1251 /*
1252  * efi_runtime_service() function identifiers.
1253  * "NONE" is used by efi_recover_from_page_fault() to check if the page
1254  * fault happened while executing an efi runtime service.
1255  */
1256 enum efi_rts_ids {
1257         EFI_NONE,
1258         EFI_GET_TIME,
1259         EFI_SET_TIME,
1260         EFI_GET_WAKEUP_TIME,
1261         EFI_SET_WAKEUP_TIME,
1262         EFI_GET_VARIABLE,
1263         EFI_GET_NEXT_VARIABLE,
1264         EFI_SET_VARIABLE,
1265         EFI_QUERY_VARIABLE_INFO,
1266         EFI_GET_NEXT_HIGH_MONO_COUNT,
1267         EFI_RESET_SYSTEM,
1268         EFI_UPDATE_CAPSULE,
1269         EFI_QUERY_CAPSULE_CAPS,
1270 };
1271
1272 /*
1273  * efi_runtime_work:    Details of EFI Runtime Service work
1274  * @arg<1-5>:           EFI Runtime Service function arguments
1275  * @status:             Status of executing EFI Runtime Service
1276  * @efi_rts_id:         EFI Runtime Service function identifier
1277  * @efi_rts_comp:       Struct used for handling completions
1278  */
1279 struct efi_runtime_work {
1280         void *arg1;
1281         void *arg2;
1282         void *arg3;
1283         void *arg4;
1284         void *arg5;
1285         efi_status_t status;
1286         struct work_struct work;
1287         enum efi_rts_ids efi_rts_id;
1288         struct completion efi_rts_comp;
1289 };
1290
1291 extern struct efi_runtime_work efi_rts_work;
1292
1293 /* Workqueue to queue EFI Runtime Services */
1294 extern struct workqueue_struct *efi_rts_wq;
1295
1296 struct linux_efi_memreserve {
1297         int             size;                   // allocated size of the array
1298         atomic_t        count;                  // number of entries used
1299         phys_addr_t     next;                   // pa of next struct instance
1300         struct {
1301                 phys_addr_t     base;
1302                 phys_addr_t     size;
1303         } entry[];
1304 };
1305
1306 #define EFI_MEMRESERVE_COUNT(size) (((size) - sizeof(struct linux_efi_memreserve)) \
1307         / sizeof_field(struct linux_efi_memreserve, entry[0]))
1308
1309 void __init efi_arch_mem_reserve(phys_addr_t addr, u64 size);
1310
1311 char *efi_systab_show_arch(char *str);
1312
1313 /*
1314  * The LINUX_EFI_MOK_VARIABLE_TABLE_GUID config table can be provided
1315  * to the kernel by an EFI boot loader. The table contains a packed
1316  * sequence of these entries, one for each named MOK variable.
1317  * The sequence is terminated by an entry with a completely NULL
1318  * name and 0 data size.
1319  */
1320 struct efi_mokvar_table_entry {
1321         char name[256];
1322         u64 data_size;
1323         u8 data[];
1324 } __attribute((packed));
1325
1326 #ifdef CONFIG_LOAD_UEFI_KEYS
1327 extern void __init efi_mokvar_table_init(void);
1328 extern struct efi_mokvar_table_entry *efi_mokvar_entry_next(
1329                         struct efi_mokvar_table_entry **mokvar_entry);
1330 extern struct efi_mokvar_table_entry *efi_mokvar_entry_find(const char *name);
1331 #else
1332 static inline void efi_mokvar_table_init(void) { }
1333 static inline struct efi_mokvar_table_entry *efi_mokvar_entry_next(
1334                         struct efi_mokvar_table_entry **mokvar_entry)
1335 {
1336         return NULL;
1337 }
1338 static inline struct efi_mokvar_table_entry *efi_mokvar_entry_find(
1339                         const char *name)
1340 {
1341         return NULL;
1342 }
1343 #endif
1344
1345 extern void efifb_setup_from_dmi(struct screen_info *si, const char *opt);
1346
1347 struct linux_efi_coco_secret_area {
1348         u64     base_pa;
1349         u64     size;
1350 };
1351
1352 struct linux_efi_initrd {
1353         unsigned long   base;
1354         unsigned long   size;
1355 };
1356
1357 /* Header of a populated EFI secret area */
1358 #define EFI_SECRET_TABLE_HEADER_GUID    EFI_GUID(0x1e74f542, 0x71dd, 0x4d66,  0x96, 0x3e, 0xef, 0x42, 0x87, 0xff, 0x17, 0x3b)
1359
1360 #endif /* _LINUX_EFI_H */