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_UNACCEPTED_MEMORY           15
 112 #define EFI_MAX_MEMORY_TYPE             16
 113
 114 /* Attribute values: */
 115 #define EFI_MEMORY_UC           ((u64)0x0000000000000001ULL)    /* uncached */
 116 #define EFI_MEMORY_WC           ((u64)0x0000000000000002ULL)    /* write-coalescing */
 117 #define EFI_MEMORY_WT           ((u64)0x0000000000000004ULL)    /* write-through */
 118 #define EFI_MEMORY_WB           ((u64)0x0000000000000008ULL)    /* write-back */
 119 #define EFI_MEMORY_UCE          ((u64)0x0000000000000010ULL)    /* uncached, exported */
 120 #define EFI_MEMORY_WP           ((u64)0x0000000000001000ULL)    /* write-protect */
 121 #define EFI_MEMORY_RP           ((u64)0x0000000000002000ULL)    /* read-protect */
 122 #define EFI_MEMORY_XP           ((u64)0x0000000000004000ULL)    /* execute-protect */
 123 #define EFI_MEMORY_NV           ((u64)0x0000000000008000ULL)    /* non-volatile */
 124 #define EFI_MEMORY_MORE_RELIABLE \
 125                                 ((u64)0x0000000000010000ULL)    /* higher reliability */
 126 #define EFI_MEMORY_RO           ((u64)0x0000000000020000ULL)    /* read-only */
 127 #define EFI_MEMORY_SP           ((u64)0x0000000000040000ULL)    /* soft reserved */
 128 #define EFI_MEMORY_CPU_CRYPTO   ((u64)0x0000000000080000ULL)    /* supports encryption */
 129 #define EFI_MEMORY_RUNTIME      ((u64)0x8000000000000000ULL)    /* range requires runtime mapping */
 130 #define EFI_MEMORY_DESCRIPTOR_VERSION   1
 131
 132 #define EFI_PAGE_SHIFT          12
 133 #define EFI_PAGE_SIZE           (1UL << EFI_PAGE_SHIFT)
 134 #define EFI_PAGES_MAX           (U64_MAX >> EFI_PAGE_SHIFT)
 135
 136 typedef struct {
 137         u32 type;
 138         u32 pad;
 139         u64 phys_addr;
 140         u64 virt_addr;
 141         u64 num_pages;
 142         u64 attribute;
 143 } efi_memory_desc_t;
 144
 145 typedef struct {
 146         efi_guid_t guid;
 147         u32 headersize;
 148         u32 flags;
 149         u32 imagesize;
 150 } efi_capsule_header_t;
 151
 152 /* EFI_FIRMWARE_MANAGEMENT_CAPSULE_HEADER */
 153 struct efi_manage_capsule_header {
 154         u32 ver;
 155         u16 emb_drv_cnt;
 156         u16 payload_cnt;
 157         /*
 158          * Variable-size array of the size given by the sum of
 159          * emb_drv_cnt and payload_cnt.
 160          */
 161         u64 offset_list[];
 162 } __packed;
 163
 164 /* EFI_FIRMWARE_MANAGEMENT_CAPSULE_IMAGE_HEADER */
 165 struct efi_manage_capsule_image_header {
 166         u32 ver;
 167         efi_guid_t image_type_id;
 168         u8 image_index;
 169         u8 reserved_bytes[3];
 170         u32 image_size;
 171         u32 vendor_code_size;
 172         /* hw_ins was introduced in version 2 */
 173         u64 hw_ins;
 174         /* capsule_support was introduced in version 3 */
 175         u64 capsule_support;
 176 } __packed;
 177
 178 /* WIN_CERTIFICATE */
 179 struct win_cert {
 180         u32 len;
 181         u16 rev;
 182         u16 cert_type;
 183 };
 184
 185 /* WIN_CERTIFICATE_UEFI_GUID */
 186 struct win_cert_uefi_guid {
 187         struct win_cert hdr;
 188         efi_guid_t cert_type;
 189         u8 cert_data[];
 190 };
 191
 192 /* EFI_FIRMWARE_IMAGE_AUTHENTICATION */
 193 struct efi_image_auth {
 194         u64 mon_count;
 195         struct win_cert_uefi_guid auth_info;
 196 };
 197
 198 /*
 199  * EFI capsule flags
 200  */
 201 #define EFI_CAPSULE_PERSIST_ACROSS_RESET        0x00010000
 202 #define EFI_CAPSULE_POPULATE_SYSTEM_TABLE       0x00020000
 203 #define EFI_CAPSULE_INITIATE_RESET              0x00040000
 204
 205 struct capsule_info {
 206         efi_capsule_header_t    header;
 207         efi_capsule_header_t    *capsule;
 208         int                     reset_type;
 209         long                    index;
 210         size_t                  count;
 211         size_t                  total_size;
 212         struct page             **pages;
 213         phys_addr_t             *phys;
 214         size_t                  page_bytes_remain;
 215 };
 216
 217 int efi_capsule_setup_info(struct capsule_info *cap_info, void *kbuff,
 218                            size_t hdr_bytes);
 219 int __efi_capsule_setup_info(struct capsule_info *cap_info);
 220
 221 /*
 222  * Types and defines for Time Services
 223  */
 224 #define EFI_TIME_ADJUST_DAYLIGHT 0x1
 225 #define EFI_TIME_IN_DAYLIGHT     0x2
 226 #define EFI_UNSPECIFIED_TIMEZONE 0x07ff
 227
 228 typedef struct {
 229         u16 year;
 230         u8 month;
 231         u8 day;
 232         u8 hour;
 233         u8 minute;
 234         u8 second;
 235         u8 pad1;
 236         u32 nanosecond;
 237         s16 timezone;
 238         u8 daylight;
 239         u8 pad2;
 240 } efi_time_t;
 241
 242 typedef struct {
 243         u32 resolution;
 244         u32 accuracy;
 245         u8 sets_to_zero;
 246 } efi_time_cap_t;
 247
 248 typedef union efi_boot_services efi_boot_services_t;
 249
 250 /*
 251  * Types and defines for EFI ResetSystem
 252  */
 253 #define EFI_RESET_COLD 0
 254 #define EFI_RESET_WARM 1
 255 #define EFI_RESET_SHUTDOWN 2
 256
 257 /*
 258  * EFI Runtime Services table
 259  */
 260 #define EFI_RUNTIME_SERVICES_SIGNATURE ((u64)0x5652453544e5552ULL)
 261 #define EFI_RUNTIME_SERVICES_REVISION  0x00010000
 262
 263 typedef struct {
 264         efi_table_hdr_t hdr;
 265         u32 get_time;
 266         u32 set_time;
 267         u32 get_wakeup_time;
 268         u32 set_wakeup_time;
 269         u32 set_virtual_address_map;
 270         u32 convert_pointer;
 271         u32 get_variable;
 272         u32 get_next_variable;
 273         u32 set_variable;
 274         u32 get_next_high_mono_count;
 275         u32 reset_system;
 276         u32 update_capsule;
 277         u32 query_capsule_caps;
 278         u32 query_variable_info;
 279 } efi_runtime_services_32_t;
 280
 281 typedef efi_status_t efi_get_time_t (efi_time_t *tm, efi_time_cap_t *tc);
 282 typedef efi_status_t efi_set_time_t (efi_time_t *tm);
 283 typedef efi_status_t efi_get_wakeup_time_t (efi_bool_t *enabled, efi_bool_t *pending,
 284                                             efi_time_t *tm);
 285 typedef efi_status_t efi_set_wakeup_time_t (efi_bool_t enabled, efi_time_t *tm);
 286 typedef efi_status_t efi_get_variable_t (efi_char16_t *name, efi_guid_t *vendor, u32 *attr,
 287                                          unsigned long *data_size, void *data);
 288 typedef efi_status_t efi_get_next_variable_t (unsigned long *name_size, efi_char16_t *name,
 289                                               efi_guid_t *vendor);
 290 typedef efi_status_t efi_set_variable_t (efi_char16_t *name, efi_guid_t *vendor,
 291                                          u32 attr, unsigned long data_size,
 292                                          void *data);
 293 typedef efi_status_t efi_get_next_high_mono_count_t (u32 *count);
 294 typedef void efi_reset_system_t (int reset_type, efi_status_t status,
 295                                  unsigned long data_size, efi_char16_t *data);
 296 typedef efi_status_t efi_set_virtual_address_map_t (unsigned long memory_map_size,
 297                                                 unsigned long descriptor_size,
 298                                                 u32 descriptor_version,
 299                                                 efi_memory_desc_t *virtual_map);
 300 typedef efi_status_t efi_query_variable_info_t(u32 attr,
 301                                                u64 *storage_space,
 302                                                u64 *remaining_space,
 303                                                u64 *max_variable_size);
 304 typedef efi_status_t efi_update_capsule_t(efi_capsule_header_t **capsules,
 305                                           unsigned long count,
 306                                           unsigned long sg_list);
 307 typedef efi_status_t efi_query_capsule_caps_t(efi_capsule_header_t **capsules,
 308                                               unsigned long count,
 309                                               u64 *max_size,
 310                                               int *reset_type);
 311 typedef efi_status_t efi_query_variable_store_t(u32 attributes,
 312                                                 unsigned long size,
 313                                                 bool nonblocking);
 314
 315 typedef union {
 316         struct {
 317                 efi_table_hdr_t                         hdr;
 318                 efi_get_time_t __efiapi                 *get_time;
 319                 efi_set_time_t __efiapi                 *set_time;
 320                 efi_get_wakeup_time_t __efiapi          *get_wakeup_time;
 321                 efi_set_wakeup_time_t __efiapi          *set_wakeup_time;
 322                 efi_set_virtual_address_map_t __efiapi  *set_virtual_address_map;
 323                 void                                    *convert_pointer;
 324                 efi_get_variable_t __efiapi             *get_variable;
 325                 efi_get_next_variable_t __efiapi        *get_next_variable;
 326                 efi_set_variable_t __efiapi             *set_variable;
 327                 efi_get_next_high_mono_count_t __efiapi *get_next_high_mono_count;
 328                 efi_reset_system_t __efiapi             *reset_system;
 329                 efi_update_capsule_t __efiapi           *update_capsule;
 330                 efi_query_capsule_caps_t __efiapi       *query_capsule_caps;
 331                 efi_query_variable_info_t __efiapi      *query_variable_info;
 332         };
 333         efi_runtime_services_32_t mixed_mode;
 334 } efi_runtime_services_t;
 335
 336 void efi_native_runtime_setup(void);
 337
 338 /*
 339  * EFI Configuration Table and GUID definitions
 340  *
 341  * These are all defined in a single line to make them easier to
 342  * grep for and to see them at a glance - while still having a
 343  * similar structure to the definitions in the spec.
 344  *
 345  * Here's how they are structured:
 346  *
 347  * GUID: 12345678-1234-1234-1234-123456789012
 348  * Spec:
 349  *      #define EFI_SOME_PROTOCOL_GUID \
 350  *        {0x12345678,0x1234,0x1234,\
 351  *          {0x12,0x34,0x12,0x34,0x56,0x78,0x90,0x12}}
 352  * Here:
 353  *      #define SOME_PROTOCOL_GUID              EFI_GUID(0x12345678, 0x1234, 0x1234,  0x12, 0x34, 0x12, 0x34, 0x56, 0x78, 0x90, 0x12)
 354  *                                      ^ tabs                                      ^extra space
 355  *
 356  * Note that the 'extra space' separates the values at the same place
 357  * where the UEFI SPEC breaks the line.
 358  */
 359 #define NULL_GUID                               EFI_GUID(0x00000000, 0x0000, 0x0000,  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00)
 360 #define MPS_TABLE_GUID                          EFI_GUID(0xeb9d2d2f, 0x2d88, 0x11d3,  0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
 361 #define ACPI_TABLE_GUID                         EFI_GUID(0xeb9d2d30, 0x2d88, 0x11d3,  0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
 362 #define ACPI_20_TABLE_GUID                      EFI_GUID(0x8868e871, 0xe4f1, 0x11d3,  0xbc, 0x22, 0x00, 0x80, 0xc7, 0x3c, 0x88, 0x81)
 363 #define SMBIOS_TABLE_GUID                       EFI_GUID(0xeb9d2d31, 0x2d88, 0x11d3,  0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
 364 #define SMBIOS3_TABLE_GUID                      EFI_GUID(0xf2fd1544, 0x9794, 0x4a2c,  0x99, 0x2e, 0xe5, 0xbb, 0xcf, 0x20, 0xe3, 0x94)
 365 #define SAL_SYSTEM_TABLE_GUID                   EFI_GUID(0xeb9d2d32, 0x2d88, 0x11d3,  0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
 366 #define HCDP_TABLE_GUID                         EFI_GUID(0xf951938d, 0x620b, 0x42ef,  0x82, 0x79, 0xa8, 0x4b, 0x79, 0x61, 0x78, 0x98)
 367 #define UGA_IO_PROTOCOL_GUID                    EFI_GUID(0x61a4d49e, 0x6f68, 0x4f1b,  0xb9, 0x22, 0xa8, 0x6e, 0xed, 0x0b, 0x07, 0xa2)
 368 #define EFI_GLOBAL_VARIABLE_GUID                EFI_GUID(0x8be4df61, 0x93ca, 0x11d2,  0xaa, 0x0d, 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c)
 369 #define UV_SYSTEM_TABLE_GUID                    EFI_GUID(0x3b13a7d4, 0x633e, 0x11dd,  0x93, 0xec, 0xda, 0x25, 0x56, 0xd8, 0x95, 0x93)
 370 #define LINUX_EFI_CRASH_GUID                    EFI_GUID(0xcfc8fc79, 0xbe2e, 0x4ddc,  0x97, 0xf0, 0x9f, 0x98, 0xbf, 0xe2, 0x98, 0xa0)
 371 #define LOADED_IMAGE_PROTOCOL_GUID              EFI_GUID(0x5b1b31a1, 0x9562, 0x11d2,  0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
 372 #define LOADED_IMAGE_DEVICE_PATH_PROTOCOL_GUID  EFI_GUID(0xbc62157e, 0x3e33, 0x4fec,  0x99, 0x20, 0x2d, 0x3b, 0x36, 0xd7, 0x50, 0xdf)
 373 #define EFI_DEVICE_PATH_PROTOCOL_GUID           EFI_GUID(0x09576e91, 0x6d3f, 0x11d2,  0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
 374 #define EFI_DEVICE_PATH_TO_TEXT_PROTOCOL_GUID   EFI_GUID(0x8b843e20, 0x8132, 0x4852,  0x90, 0xcc, 0x55, 0x1a, 0x4e, 0x4a, 0x7f, 0x1c)
 375 #define EFI_DEVICE_PATH_FROM_TEXT_PROTOCOL_GUID EFI_GUID(0x05c99a21, 0xc70f, 0x4ad2,  0x8a, 0x5f, 0x35, 0xdf, 0x33, 0x43, 0xf5, 0x1e)
 376 #define EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID       EFI_GUID(0x9042a9de, 0x23dc, 0x4a38,  0x96, 0xfb, 0x7a, 0xde, 0xd0, 0x80, 0x51, 0x6a)
 377 #define EFI_UGA_PROTOCOL_GUID                   EFI_GUID(0x982c298b, 0xf4fa, 0x41cb,  0xb8, 0x38, 0x77, 0xaa, 0x68, 0x8f, 0xb8, 0x39)
 378 #define EFI_PCI_IO_PROTOCOL_GUID                EFI_GUID(0x4cf5b200, 0x68b8, 0x4ca5,  0x9e, 0xec, 0xb2, 0x3e, 0x3f, 0x50, 0x02, 0x9a)
 379 #define EFI_FILE_INFO_ID                        EFI_GUID(0x09576e92, 0x6d3f, 0x11d2,  0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
 380 #define EFI_SYSTEM_RESOURCE_TABLE_GUID          EFI_GUID(0xb122a263, 0x3661, 0x4f68,  0x99, 0x29, 0x78, 0xf8, 0xb0, 0xd6, 0x21, 0x80)
 381 #define EFI_FILE_SYSTEM_GUID                    EFI_GUID(0x964e5b22, 0x6459, 0x11d2,  0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
 382 #define DEVICE_TREE_GUID                        EFI_GUID(0xb1b621d5, 0xf19c, 0x41a5,  0x83, 0x0b, 0xd9, 0x15, 0x2c, 0x69, 0xaa, 0xe0)
 383 #define EFI_PROPERTIES_TABLE_GUID               EFI_GUID(0x880aaca3, 0x4adc, 0x4a04,  0x90, 0x79, 0xb7, 0x47, 0x34, 0x08, 0x25, 0xe5)
 384 #define EFI_RNG_PROTOCOL_GUID                   EFI_GUID(0x3152bca5, 0xeade, 0x433d,  0x86, 0x2e, 0xc0, 0x1c, 0xdc, 0x29, 0x1f, 0x44)
 385 #define EFI_RNG_ALGORITHM_RAW                   EFI_GUID(0xe43176d7, 0xb6e8, 0x4827,  0xb7, 0x84, 0x7f, 0xfd, 0xc4, 0xb6, 0x85, 0x61)
 386 #define EFI_MEMORY_ATTRIBUTES_TABLE_GUID        EFI_GUID(0xdcfa911d, 0x26eb, 0x469f,  0xa2, 0x20, 0x38, 0xb7, 0xdc, 0x46, 0x12, 0x20)
 387 #define EFI_CONSOLE_OUT_DEVICE_GUID             EFI_GUID(0xd3b36f2c, 0xd551, 0x11d4,  0x9a, 0x46, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
 388 #define APPLE_PROPERTIES_PROTOCOL_GUID          EFI_GUID(0x91bd12fe, 0xf6c3, 0x44fb,  0xa5, 0xb7, 0x51, 0x22, 0xab, 0x30, 0x3a, 0xe0)
 389 #define EFI_TCG2_PROTOCOL_GUID                  EFI_GUID(0x607f766c, 0x7455, 0x42be,  0x93, 0x0b, 0xe4, 0xd7, 0x6d, 0xb2, 0x72, 0x0f)
 390 #define EFI_LOAD_FILE_PROTOCOL_GUID             EFI_GUID(0x56ec3091, 0x954c, 0x11d2,  0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
 391 #define EFI_LOAD_FILE2_PROTOCOL_GUID            EFI_GUID(0x4006c0c1, 0xfcb3, 0x403e,  0x99, 0x6d, 0x4a, 0x6c, 0x87, 0x24, 0xe0, 0x6d)
 392 #define EFI_RT_PROPERTIES_TABLE_GUID            EFI_GUID(0xeb66918a, 0x7eef, 0x402a,  0x84, 0x2e, 0x93, 0x1d, 0x21, 0xc3, 0x8a, 0xe9)
 393 #define EFI_DXE_SERVICES_TABLE_GUID             EFI_GUID(0x05ad34ba, 0x6f02, 0x4214,  0x95, 0x2e, 0x4d, 0xa0, 0x39, 0x8e, 0x2b, 0xb9)
 394 #define EFI_SMBIOS_PROTOCOL_GUID                EFI_GUID(0x03583ff6, 0xcb36, 0x4940,  0x94, 0x7e, 0xb9, 0xb3, 0x9f, 0x4a, 0xfa, 0xf7)
 395 #define EFI_MEMORY_ATTRIBUTE_PROTOCOL_GUID      EFI_GUID(0xf4560cf6, 0x40ec, 0x4b4a,  0xa1, 0x92, 0xbf, 0x1d, 0x57, 0xd0, 0xb1, 0x89)
 396
 397 #define EFI_IMAGE_SECURITY_DATABASE_GUID        EFI_GUID(0xd719b2cb, 0x3d3a, 0x4596,  0xa3, 0xbc, 0xda, 0xd0, 0x0e, 0x67, 0x65, 0x6f)
 398 #define EFI_SHIM_LOCK_GUID                      EFI_GUID(0x605dab50, 0xe046, 0x4300,  0xab, 0xb6, 0x3d, 0xd8, 0x10, 0xdd, 0x8b, 0x23)
 399
 400 #define EFI_CERT_SHA256_GUID                    EFI_GUID(0xc1c41626, 0x504c, 0x4092, 0xac, 0xa9, 0x41, 0xf9, 0x36, 0x93, 0x43, 0x28)
 401 #define EFI_CERT_X509_GUID                      EFI_GUID(0xa5c059a1, 0x94e4, 0x4aa7, 0x87, 0xb5, 0xab, 0x15, 0x5c, 0x2b, 0xf0, 0x72)
 402 #define EFI_CERT_X509_SHA256_GUID               EFI_GUID(0x3bd2a492, 0x96c0, 0x4079, 0xb4, 0x20, 0xfc, 0xf9, 0x8e, 0xf1, 0x03, 0xed)
 403 #define EFI_CC_BLOB_GUID                        EFI_GUID(0x067b1f5f, 0xcf26, 0x44c5, 0x85, 0x54, 0x93, 0xd7, 0x77, 0x91, 0x2d, 0x42)
 404
 405 /*
 406  * This GUID is used to pass to the kernel proper the struct screen_info
 407  * structure that was populated by the stub based on the GOP protocol instance
 408  * associated with ConOut
 409  */
 410 #define LINUX_EFI_SCREEN_INFO_TABLE_GUID        EFI_GUID(0xe03fc20a, 0x85dc, 0x406e,  0xb9, 0x0e, 0x4a, 0xb5, 0x02, 0x37, 0x1d, 0x95)
 411 #define LINUX_EFI_ARM_CPU_STATE_TABLE_GUID      EFI_GUID(0xef79e4aa, 0x3c3d, 0x4989,  0xb9, 0x02, 0x07, 0xa9, 0x43, 0xe5, 0x50, 0xd2)
 412 #define LINUX_EFI_LOADER_ENTRY_GUID             EFI_GUID(0x4a67b082, 0x0a4c, 0x41cf,  0xb6, 0xc7, 0x44, 0x0b, 0x29, 0xbb, 0x8c, 0x4f)
 413 #define LINUX_EFI_RANDOM_SEED_TABLE_GUID        EFI_GUID(0x1ce1e5bc, 0x7ceb, 0x42f2,  0x81, 0xe5, 0x8a, 0xad, 0xf1, 0x80, 0xf5, 0x7b)
 414 #define LINUX_EFI_TPM_EVENT_LOG_GUID            EFI_GUID(0xb7799cb0, 0xeca2, 0x4943,  0x96, 0x67, 0x1f, 0xae, 0x07, 0xb7, 0x47, 0xfa)
 415 #define LINUX_EFI_TPM_FINAL_LOG_GUID            EFI_GUID(0x1e2ed096, 0x30e2, 0x4254,  0xbd, 0x89, 0x86, 0x3b, 0xbe, 0xf8, 0x23, 0x25)
 416 #define LINUX_EFI_MEMRESERVE_TABLE_GUID         EFI_GUID(0x888eb0c6, 0x8ede, 0x4ff5,  0xa8, 0xf0, 0x9a, 0xee, 0x5c, 0xb9, 0x77, 0xc2)
 417 #define LINUX_EFI_INITRD_MEDIA_GUID             EFI_GUID(0x5568e427, 0x68fc, 0x4f3d,  0xac, 0x74, 0xca, 0x55, 0x52, 0x31, 0xcc, 0x68)
 418 #define LINUX_EFI_MOK_VARIABLE_TABLE_GUID       EFI_GUID(0xc451ed2b, 0x9694, 0x45d3,  0xba, 0xba, 0xed, 0x9f, 0x89, 0x88, 0xa3, 0x89)
 419 #define LINUX_EFI_COCO_SECRET_AREA_GUID         EFI_GUID(0xadf956ad, 0xe98c, 0x484c,  0xae, 0x11, 0xb5, 0x1c, 0x7d, 0x33, 0x64, 0x47)
 420 #define LINUX_EFI_BOOT_MEMMAP_GUID              EFI_GUID(0x800f683f, 0xd08b, 0x423a,  0xa2, 0x93, 0x96, 0x5c, 0x3c, 0x6f, 0xe2, 0xb4)
 421 #define LINUX_EFI_UNACCEPTED_MEM_TABLE_GUID     EFI_GUID(0xd5d1de3c, 0x105c, 0x44f9,  0x9e, 0xa9, 0xbc, 0xef, 0x98, 0x12, 0x00, 0x31)
 422
 423 #define RISCV_EFI_BOOT_PROTOCOL_GUID            EFI_GUID(0xccd15fec, 0x6f73, 0x4eec,  0x83, 0x95, 0x3e, 0x69, 0xe4, 0xb9, 0x40, 0xbf)
 424
 425 /*
 426  * This GUID may be installed onto the kernel image's handle as a NULL protocol
 427  * to signal to the stub that the placement of the image should be respected,
 428  * and moving the image in physical memory is undesirable. To ensure
 429  * compatibility with 64k pages kernels with virtually mapped stacks, and to
 430  * avoid defeating physical randomization, this protocol should only be
 431  * installed if the image was placed at a randomized 128k aligned address in
 432  * memory.
 433  */
 434 #define LINUX_EFI_LOADED_IMAGE_FIXED_GUID       EFI_GUID(0xf5a37b6d, 0x3344, 0x42a5,  0xb6, 0xbb, 0x97, 0x86, 0x48, 0xc1, 0x89, 0x0a)
 435
 436 /* OEM GUIDs */
 437 #define DELLEMC_EFI_RCI2_TABLE_GUID             EFI_GUID(0x2d9f28a2, 0xa886, 0x456a,  0x97, 0xa8, 0xf1, 0x1e, 0xf2, 0x4f, 0xf4, 0x55)
 438 #define AMD_SEV_MEM_ENCRYPT_GUID                EFI_GUID(0x0cf29b71, 0x9e51, 0x433a,  0xa3, 0xb7, 0x81, 0xf3, 0xab, 0x16, 0xb8, 0x75)
 439
 440 /* OVMF protocol GUIDs */
 441 #define OVMF_SEV_MEMORY_ACCEPTANCE_PROTOCOL_GUID        EFI_GUID(0xc5a010fe, 0x38a7, 0x4531,  0x8a, 0x4a, 0x05, 0x00, 0xd2, 0xfd, 0x16, 0x49)
 442
 443 typedef struct {
 444         efi_guid_t guid;
 445         u64 table;
 446 } efi_config_table_64_t;
 447
 448 typedef struct {
 449         efi_guid_t guid;
 450         u32 table;
 451 } efi_config_table_32_t;
 452
 453 typedef union {
 454         struct {
 455                 efi_guid_t guid;
 456                 void *table;
 457         };
 458         efi_config_table_32_t mixed_mode;
 459 } efi_config_table_t;
 460
 461 typedef struct {
 462         efi_guid_t guid;
 463         unsigned long *ptr;
 464         const char name[16];
 465 } efi_config_table_type_t;
 466
 467 #define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL)
 468 #define EFI_DXE_SERVICES_TABLE_SIGNATURE ((u64)0x565245535f455844ULL)
 469
 470 #define EFI_2_30_SYSTEM_TABLE_REVISION  ((2 << 16) | (30))
 471 #define EFI_2_20_SYSTEM_TABLE_REVISION  ((2 << 16) | (20))
 472 #define EFI_2_10_SYSTEM_TABLE_REVISION  ((2 << 16) | (10))
 473 #define EFI_2_00_SYSTEM_TABLE_REVISION  ((2 << 16) | (00))
 474 #define EFI_1_10_SYSTEM_TABLE_REVISION  ((1 << 16) | (10))
 475 #define EFI_1_02_SYSTEM_TABLE_REVISION  ((1 << 16) | (02))
 476
 477 typedef struct {
 478         efi_table_hdr_t hdr;
 479         u64 fw_vendor;  /* physical addr of CHAR16 vendor string */
 480         u32 fw_revision;
 481         u32 __pad1;
 482         u64 con_in_handle;
 483         u64 con_in;
 484         u64 con_out_handle;
 485         u64 con_out;
 486         u64 stderr_handle;
 487         u64 stderr;
 488         u64 runtime;
 489         u64 boottime;
 490         u32 nr_tables;
 491         u32 __pad2;
 492         u64 tables;
 493 } efi_system_table_64_t;
 494
 495 typedef struct {
 496         efi_table_hdr_t hdr;
 497         u32 fw_vendor;  /* physical addr of CHAR16 vendor string */
 498         u32 fw_revision;
 499         u32 con_in_handle;
 500         u32 con_in;
 501         u32 con_out_handle;
 502         u32 con_out;
 503         u32 stderr_handle;
 504         u32 stderr;
 505         u32 runtime;
 506         u32 boottime;
 507         u32 nr_tables;
 508         u32 tables;
 509 } efi_system_table_32_t;
 510
 511 typedef union efi_simple_text_input_protocol efi_simple_text_input_protocol_t;
 512 typedef union efi_simple_text_output_protocol efi_simple_text_output_protocol_t;
 513
 514 typedef union {
 515         struct {
 516                 efi_table_hdr_t hdr;
 517                 unsigned long fw_vendor;        /* physical addr of CHAR16 vendor string */
 518                 u32 fw_revision;
 519                 unsigned long con_in_handle;
 520                 efi_simple_text_input_protocol_t *con_in;
 521                 unsigned long con_out_handle;
 522                 efi_simple_text_output_protocol_t *con_out;
 523                 unsigned long stderr_handle;
 524                 unsigned long stderr;
 525                 efi_runtime_services_t *runtime;
 526                 efi_boot_services_t *boottime;
 527                 unsigned long nr_tables;
 528                 unsigned long tables;
 529         };
 530         efi_system_table_32_t mixed_mode;
 531 } efi_system_table_t;
 532
 533 struct efi_boot_memmap {
 534         unsigned long           map_size;
 535         unsigned long           desc_size;
 536         u32                     desc_ver;
 537         unsigned long           map_key;
 538         unsigned long           buff_size;
 539         efi_memory_desc_t       map[];
 540 };
 541
 542 struct efi_unaccepted_memory {
 543         u32 version;
 544         u32 unit_size;
 545         u64 phys_base;
 546         u64 size;
 547         unsigned long bitmap[];
 548 };
 549
 550 /*
 551  * Architecture independent structure for describing a memory map for the
 552  * benefit of efi_memmap_init_early(), and for passing context between
 553  * efi_memmap_alloc() and efi_memmap_install().
 554  */
 555 struct efi_memory_map_data {
 556         phys_addr_t phys_map;
 557         unsigned long size;
 558         unsigned long desc_version;
 559         unsigned long desc_size;
 560         unsigned long flags;
 561 };
 562
 563 struct efi_memory_map {
 564         phys_addr_t phys_map;
 565         void *map;
 566         void *map_end;
 567         int nr_map;
 568         unsigned long desc_version;
 569         unsigned long desc_size;
 570 #define EFI_MEMMAP_LATE (1UL << 0)
 571 #define EFI_MEMMAP_MEMBLOCK (1UL << 1)
 572 #define EFI_MEMMAP_SLAB (1UL << 2)
 573         unsigned long flags;
 574 };
 575
 576 struct efi_mem_range {
 577         struct range range;
 578         u64 attribute;
 579 };
 580
 581 typedef struct {
 582         u32 version;
 583         u32 length;
 584         u64 memory_protection_attribute;
 585 } efi_properties_table_t;
 586
 587 #define EFI_PROPERTIES_TABLE_VERSION    0x00010000
 588 #define EFI_PROPERTIES_RUNTIME_MEMORY_PROTECTION_NON_EXECUTABLE_PE_DATA 0x1
 589
 590 typedef struct {
 591         u16 version;
 592         u16 length;
 593         u32 runtime_services_supported;
 594 } efi_rt_properties_table_t;
 595
 596 #define EFI_RT_PROPERTIES_TABLE_VERSION 0x1
 597
 598 #define EFI_INVALID_TABLE_ADDR          (~0UL)
 599
 600 // BIT0 implies that Runtime code includes the forward control flow guard
 601 // instruction, such as X86 CET-IBT or ARM BTI.
 602 #define EFI_MEMORY_ATTRIBUTES_FLAGS_RT_FORWARD_CONTROL_FLOW_GUARD       0x1
 603
 604 typedef struct {
 605         u32 version;
 606         u32 num_entries;
 607         u32 desc_size;
 608         u32 flags;
 609         efi_memory_desc_t entry[0];
 610 } efi_memory_attributes_table_t;
 611
 612 typedef struct {
 613         efi_guid_t signature_owner;
 614         u8 signature_data[];
 615 } efi_signature_data_t;
 616
 617 typedef struct {
 618         efi_guid_t signature_type;
 619         u32 signature_list_size;
 620         u32 signature_header_size;
 621         u32 signature_size;
 622         u8 signature_header[];
 623         /* efi_signature_data_t signatures[][] */
 624 } efi_signature_list_t;
 625
 626 typedef u8 efi_sha256_hash_t[32];
 627
 628 typedef struct {
 629         efi_sha256_hash_t to_be_signed_hash;
 630         efi_time_t time_of_revocation;
 631 } efi_cert_x509_sha256_t;
 632
 633 extern unsigned long __ro_after_init efi_rng_seed;              /* RNG Seed table */
 634
 635 /*
 636  * All runtime access to EFI goes through this structure:
 637  */
 638 extern struct efi {
 639         const efi_runtime_services_t    *runtime;               /* EFI runtime services table */
 640         unsigned int                    runtime_version;        /* Runtime services version */
 641         unsigned int                    runtime_supported_mask;
 642
 643         unsigned long                   acpi;                   /* ACPI table  (IA64 ext 0.71) */
 644         unsigned long                   acpi20;                 /* ACPI table  (ACPI 2.0) */
 645         unsigned long                   smbios;                 /* SMBIOS table (32 bit entry point) */
 646         unsigned long                   smbios3;                /* SMBIOS table (64 bit entry point) */
 647         unsigned long                   esrt;                   /* ESRT table */
 648         unsigned long                   tpm_log;                /* TPM2 Event Log table */
 649         unsigned long                   tpm_final_log;          /* TPM2 Final Events Log table */
 650         unsigned long                   mokvar_table;           /* MOK variable config table */
 651         unsigned long                   coco_secret;            /* Confidential computing secret table */
 652         unsigned long                   unaccepted;             /* Unaccepted memory table */
 653
 654         efi_get_time_t                  *get_time;
 655         efi_set_time_t                  *set_time;
 656         efi_get_wakeup_time_t           *get_wakeup_time;
 657         efi_set_wakeup_time_t           *set_wakeup_time;
 658         efi_get_variable_t              *get_variable;
 659         efi_get_next_variable_t         *get_next_variable;
 660         efi_set_variable_t              *set_variable;
 661         efi_set_variable_t              *set_variable_nonblocking;
 662         efi_query_variable_info_t       *query_variable_info;
 663         efi_query_variable_info_t       *query_variable_info_nonblocking;
 664         efi_update_capsule_t            *update_capsule;
 665         efi_query_capsule_caps_t        *query_capsule_caps;
 666         efi_get_next_high_mono_count_t  *get_next_high_mono_count;
 667         efi_reset_system_t              *reset_system;
 668
 669         struct efi_memory_map           memmap;
 670         unsigned long                   flags;
 671 } efi;
 672
 673 #define EFI_RT_SUPPORTED_GET_TIME                               0x0001
 674 #define EFI_RT_SUPPORTED_SET_TIME                               0x0002
 675 #define EFI_RT_SUPPORTED_GET_WAKEUP_TIME                        0x0004
 676 #define EFI_RT_SUPPORTED_SET_WAKEUP_TIME                        0x0008
 677 #define EFI_RT_SUPPORTED_GET_VARIABLE                           0x0010
 678 #define EFI_RT_SUPPORTED_GET_NEXT_VARIABLE_NAME                 0x0020
 679 #define EFI_RT_SUPPORTED_SET_VARIABLE                           0x0040
 680 #define EFI_RT_SUPPORTED_SET_VIRTUAL_ADDRESS_MAP                0x0080
 681 #define EFI_RT_SUPPORTED_CONVERT_POINTER                        0x0100
 682 #define EFI_RT_SUPPORTED_GET_NEXT_HIGH_MONOTONIC_COUNT          0x0200
 683 #define EFI_RT_SUPPORTED_RESET_SYSTEM                           0x0400
 684 #define EFI_RT_SUPPORTED_UPDATE_CAPSULE                         0x0800
 685 #define EFI_RT_SUPPORTED_QUERY_CAPSULE_CAPABILITIES             0x1000
 686 #define EFI_RT_SUPPORTED_QUERY_VARIABLE_INFO                    0x2000
 687
 688 #define EFI_RT_SUPPORTED_ALL                                    0x3fff
 689
 690 #define EFI_RT_SUPPORTED_TIME_SERVICES                          0x0003
 691 #define EFI_RT_SUPPORTED_WAKEUP_SERVICES                        0x000c
 692 #define EFI_RT_SUPPORTED_VARIABLE_SERVICES                      0x0070
 693
 694 extern struct mm_struct efi_mm;
 695
 696 static inline int
 697 efi_guidcmp (efi_guid_t left, efi_guid_t right)
 698 {
 699         return memcmp(&left, &right, sizeof (efi_guid_t));
 700 }
 701
 702 static inline char *
 703 efi_guid_to_str(efi_guid_t *guid, char *out)
 704 {
 705         sprintf(out, "%pUl", guid->b);
 706         return out;
 707 }
 708
 709 extern void efi_init (void);
 710 extern void efi_earlycon_reprobe(void);
 711 #ifdef CONFIG_EFI
 712 extern void efi_enter_virtual_mode (void);      /* switch EFI to virtual mode, if possible */
 713 #else
 714 static inline void efi_enter_virtual_mode (void) {}
 715 #endif
 716 #ifdef CONFIG_X86
 717 extern efi_status_t efi_query_variable_store(u32 attributes,
 718                                              unsigned long size,
 719                                              bool nonblocking);
 720 #else
 721
 722 static inline efi_status_t efi_query_variable_store(u32 attributes,
 723                                                     unsigned long size,
 724                                                     bool nonblocking)
 725 {
 726         return EFI_SUCCESS;
 727 }
 728 #endif
 729
 730 extern int __init __efi_memmap_init(struct efi_memory_map_data *data);
 731 extern int __init efi_memmap_init_early(struct efi_memory_map_data *data);
 732 extern int __init efi_memmap_init_late(phys_addr_t addr, unsigned long size);
 733 extern void __init efi_memmap_unmap(void);
 734
 735 #ifdef CONFIG_EFI_ESRT
 736 extern void __init efi_esrt_init(void);
 737 #else
 738 static inline void efi_esrt_init(void) { }
 739 #endif
 740 extern int efi_config_parse_tables(const efi_config_table_t *config_tables,
 741                                    int count,
 742                                    const efi_config_table_type_t *arch_tables);
 743 extern int efi_systab_check_header(const efi_table_hdr_t *systab_hdr);
 744 extern void efi_systab_report_header(const efi_table_hdr_t *systab_hdr,
 745                                      unsigned long fw_vendor);
 746 extern u64 efi_get_iobase (void);
 747 extern int efi_mem_type(unsigned long phys_addr);
 748 extern u64 efi_mem_attributes (unsigned long phys_addr);
 749 extern u64 efi_mem_attribute (unsigned long phys_addr, unsigned long size);
 750 extern int __init efi_uart_console_only (void);
 751 extern u64 efi_mem_desc_end(efi_memory_desc_t *md);
 752 extern int efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md);
 753 extern int __efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md);
 754 extern void efi_mem_reserve(phys_addr_t addr, u64 size);
 755 extern int efi_mem_reserve_persistent(phys_addr_t addr, u64 size);
 756 extern void efi_initialize_iomem_resources(struct resource *code_resource,
 757                 struct resource *data_resource, struct resource *bss_resource);
 758 extern u64 efi_get_fdt_params(struct efi_memory_map_data *data);
 759 extern struct kobject *efi_kobj;
 760
 761 extern int efi_reboot_quirk_mode;
 762 extern bool efi_poweroff_required(void);
 763
 764 extern unsigned long efi_mem_attr_table;
 765
 766 /*
 767  * efi_memattr_perm_setter - arch specific callback function passed into
 768  *                           efi_memattr_apply_permissions() that updates the
 769  *                           mapping permissions described by the second
 770  *                           argument in the page tables referred to by the
 771  *                           first argument.
 772  */
 773 typedef int (*efi_memattr_perm_setter)(struct mm_struct *, efi_memory_desc_t *, bool);
 774
 775 extern int efi_memattr_init(void);
 776 extern int efi_memattr_apply_permissions(struct mm_struct *mm,
 777                                          efi_memattr_perm_setter fn);
 778
 779 /*
 780  * efi_early_memdesc_ptr - get the n-th EFI memmap descriptor
 781  * @map: the start of efi memmap
 782  * @desc_size: the size of space for each EFI memmap descriptor
 783  * @n: the index of efi memmap descriptor
 784  *
 785  * EFI boot service provides the GetMemoryMap() function to get a copy of the
 786  * current memory map which is an array of memory descriptors, each of
 787  * which describes a contiguous block of memory. It also gets the size of the
 788  * map, and the size of each descriptor, etc.
 789  *
 790  * Note that per section 6.2 of UEFI Spec 2.6 Errata A, the returned size of
 791  * each descriptor might not be equal to sizeof(efi_memory_memdesc_t),
 792  * since efi_memory_memdesc_t may be extended in the future. Thus the OS
 793  * MUST use the returned size of the descriptor to find the start of each
 794  * efi_memory_memdesc_t in the memory map array. This should only be used
 795  * during bootup since for_each_efi_memory_desc_xxx() is available after the
 796  * kernel initializes the EFI subsystem to set up struct efi_memory_map.
 797  */
 798 #define efi_early_memdesc_ptr(map, desc_size, n)                        \
 799         (efi_memory_desc_t *)((void *)(map) + ((n) * (desc_size)))
 800
 801 /* Iterate through an efi_memory_map */
 802 #define for_each_efi_memory_desc_in_map(m, md)                             \
 803         for ((md) = (m)->map;                                              \
 804              (md) && ((void *)(md) + (m)->desc_size) <= (m)->map_end;      \
 805              (md) = (void *)(md) + (m)->desc_size)
 806
 807 /**
 808  * for_each_efi_memory_desc - iterate over descriptors in efi.memmap
 809  * @md: the efi_memory_desc_t * iterator
 810  *
 811  * Once the loop finishes @md must not be accessed.
 812  */
 813 #define for_each_efi_memory_desc(md) \
 814         for_each_efi_memory_desc_in_map(&efi.memmap, md)
 815
 816 /*
 817  * Format an EFI memory descriptor's type and attributes to a user-provided
 818  * character buffer, as per snprintf(), and return the buffer.
 819  */
 820 char * __init efi_md_typeattr_format(char *buf, size_t size,
 821                                      const efi_memory_desc_t *md);
 822
 823
 824 typedef void (*efi_element_handler_t)(const char *source,
 825                                       const void *element_data,
 826                                       size_t element_size);
 827 extern int __init parse_efi_signature_list(
 828         const char *source,
 829         const void *data, size_t size,
 830         efi_element_handler_t (*get_handler_for_guid)(const efi_guid_t *));
 831
 832 /**
 833  * efi_range_is_wc - check the WC bit on an address range
 834  * @start: starting kvirt address
 835  * @len: length of range
 836  *
 837  * Consult the EFI memory map and make sure it's ok to set this range WC.
 838  * Returns true or false.
 839  */
 840 static inline int efi_range_is_wc(unsigned long start, unsigned long len)
 841 {
 842         unsigned long i;
 843
 844         for (i = 0; i < len; i += (1UL << EFI_PAGE_SHIFT)) {
 845                 unsigned long paddr = __pa(start + i);
 846                 if (!(efi_mem_attributes(paddr) & EFI_MEMORY_WC))
 847                         return 0;
 848         }
 849         /* The range checked out */
 850         return 1;
 851 }
 852
 853 #ifdef CONFIG_EFI_PCDP
 854 extern int __init efi_setup_pcdp_console(char *);
 855 #endif
 856
 857 /*
 858  * We play games with efi_enabled so that the compiler will, if
 859  * possible, remove EFI-related code altogether.
 860  */
 861 #define EFI_BOOT                0       /* Were we booted from EFI? */
 862 #define EFI_CONFIG_TABLES       2       /* Can we use EFI config tables? */
 863 #define EFI_RUNTIME_SERVICES    3       /* Can we use runtime services? */
 864 #define EFI_MEMMAP              4       /* Can we use EFI memory map? */
 865 #define EFI_64BIT               5       /* Is the firmware 64-bit? */
 866 #define EFI_PARAVIRT            6       /* Access is via a paravirt interface */
 867 #define EFI_ARCH_1              7       /* First arch-specific bit */
 868 #define EFI_DBG                 8       /* Print additional debug info at runtime */
 869 #define EFI_NX_PE_DATA          9       /* Can runtime data regions be mapped non-executable? */
 870 #define EFI_MEM_ATTR            10      /* Did firmware publish an EFI_MEMORY_ATTRIBUTES table? */
 871 #define EFI_MEM_NO_SOFT_RESERVE 11      /* Is the kernel configured to ignore soft reservations? */
 872 #define EFI_PRESERVE_BS_REGIONS 12      /* Are EFI boot-services memory segments available? */
 873
 874 #ifdef CONFIG_EFI
 875 /*
 876  * Test whether the above EFI_* bits are enabled.
 877  */
 878 static inline bool efi_enabled(int feature)
 879 {
 880         return test_bit(feature, &efi.flags) != 0;
 881 }
 882 extern void efi_reboot(enum reboot_mode reboot_mode, const char *__unused);
 883
 884 bool __pure __efi_soft_reserve_enabled(void);
 885
 886 static inline bool __pure efi_soft_reserve_enabled(void)
 887 {
 888         return IS_ENABLED(CONFIG_EFI_SOFT_RESERVE)
 889                 && __efi_soft_reserve_enabled();
 890 }
 891
 892 static inline bool efi_rt_services_supported(unsigned int mask)
 893 {
 894         return (efi.runtime_supported_mask & mask) == mask;
 895 }
 896 extern void efi_find_mirror(void);
 897 #else
 898 static inline bool efi_enabled(int feature)
 899 {
 900         return false;
 901 }
 902 static inline void
 903 efi_reboot(enum reboot_mode reboot_mode, const char *__unused) {}
 904
 905 static inline bool efi_soft_reserve_enabled(void)
 906 {
 907         return false;
 908 }
 909
 910 static inline bool efi_rt_services_supported(unsigned int mask)
 911 {
 912         return false;
 913 }
 914
 915 static inline void efi_find_mirror(void) {}
 916 #endif
 917
 918 extern int efi_status_to_err(efi_status_t status);
 919
 920 /*
 921  * Variable Attributes
 922  */
 923 #define EFI_VARIABLE_NON_VOLATILE       0x0000000000000001
 924 #define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
 925 #define EFI_VARIABLE_RUNTIME_ACCESS     0x0000000000000004
 926 #define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008
 927 #define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010
 928 #define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020
 929 #define EFI_VARIABLE_APPEND_WRITE       0x0000000000000040
 930
 931 #define EFI_VARIABLE_MASK       (EFI_VARIABLE_NON_VOLATILE | \
 932                                 EFI_VARIABLE_BOOTSERVICE_ACCESS | \
 933                                 EFI_VARIABLE_RUNTIME_ACCESS | \
 934                                 EFI_VARIABLE_HARDWARE_ERROR_RECORD | \
 935                                 EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \
 936                                 EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \
 937                                 EFI_VARIABLE_APPEND_WRITE)
 938 /*
 939  * Length of a GUID string (strlen("aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee"))
 940  * not including trailing NUL
 941  */
 942 #define EFI_VARIABLE_GUID_LEN   UUID_STRING_LEN
 943
 944 /*
 945  * EFI Device Path information
 946  */
 947 #define EFI_DEV_HW                      0x01
 948 #define  EFI_DEV_PCI                             1
 949 #define  EFI_DEV_PCCARD                          2
 950 #define  EFI_DEV_MEM_MAPPED                      3
 951 #define  EFI_DEV_VENDOR                          4
 952 #define  EFI_DEV_CONTROLLER                      5
 953 #define EFI_DEV_ACPI                    0x02
 954 #define   EFI_DEV_BASIC_ACPI                     1
 955 #define   EFI_DEV_EXPANDED_ACPI                  2
 956 #define EFI_DEV_MSG                     0x03
 957 #define   EFI_DEV_MSG_ATAPI                      1
 958 #define   EFI_DEV_MSG_SCSI                       2
 959 #define   EFI_DEV_MSG_FC                         3
 960 #define   EFI_DEV_MSG_1394                       4
 961 #define   EFI_DEV_MSG_USB                        5
 962 #define   EFI_DEV_MSG_USB_CLASS                 15
 963 #define   EFI_DEV_MSG_I20                        6
 964 #define   EFI_DEV_MSG_MAC                       11
 965 #define   EFI_DEV_MSG_IPV4                      12
 966 #define   EFI_DEV_MSG_IPV6                      13
 967 #define   EFI_DEV_MSG_INFINIBAND                 9
 968 #define   EFI_DEV_MSG_UART                      14
 969 #define   EFI_DEV_MSG_VENDOR                    10
 970 #define EFI_DEV_MEDIA                   0x04
 971 #define   EFI_DEV_MEDIA_HARD_DRIVE               1
 972 #define   EFI_DEV_MEDIA_CDROM                    2
 973 #define   EFI_DEV_MEDIA_VENDOR                   3
 974 #define   EFI_DEV_MEDIA_FILE                     4
 975 #define   EFI_DEV_MEDIA_PROTOCOL                 5
 976 #define   EFI_DEV_MEDIA_REL_OFFSET               8
 977 #define EFI_DEV_BIOS_BOOT               0x05
 978 #define EFI_DEV_END_PATH                0x7F
 979 #define EFI_DEV_END_PATH2               0xFF
 980 #define   EFI_DEV_END_INSTANCE                  0x01
 981 #define   EFI_DEV_END_ENTIRE                    0xFF
 982
 983 struct efi_generic_dev_path {
 984         u8                              type;
 985         u8                              sub_type;
 986         u16                             length;
 987 } __packed;
 988
 989 struct efi_acpi_dev_path {
 990         struct efi_generic_dev_path     header;
 991         u32                             hid;
 992         u32                             uid;
 993 } __packed;
 994
 995 struct efi_pci_dev_path {
 996         struct efi_generic_dev_path     header;
 997         u8                              fn;
 998         u8                              dev;
 999 } __packed;
1000
1001 struct efi_vendor_dev_path {
1002         struct efi_generic_dev_path     header;
1003         efi_guid_t                      vendorguid;
1004         u8                              vendordata[];
1005 } __packed;
1006
1007 struct efi_rel_offset_dev_path {
1008         struct efi_generic_dev_path     header;
1009         u32                             reserved;
1010         u64                             starting_offset;
1011         u64                             ending_offset;
1012 } __packed;
1013
1014 struct efi_mem_mapped_dev_path {
1015         struct efi_generic_dev_path     header;
1016         u32                             memory_type;
1017         u64                             starting_addr;
1018         u64                             ending_addr;
1019 } __packed;
1020
1021 struct efi_file_path_dev_path {
1022         struct efi_generic_dev_path     header;
1023         efi_char16_t                    filename[];
1024 } __packed;
1025
1026 struct efi_dev_path {
1027         union {
1028                 struct efi_generic_dev_path     header;
1029                 struct efi_acpi_dev_path        acpi;
1030                 struct efi_pci_dev_path         pci;
1031                 struct efi_vendor_dev_path      vendor;
1032                 struct efi_rel_offset_dev_path  rel_offset;
1033         };
1034 } __packed;
1035
1036 struct device *efi_get_device_by_path(const struct efi_dev_path **node,
1037                                       size_t *len);
1038
1039 static inline void memrange_efi_to_native(u64 *addr, u64 *npages)
1040 {
1041         *npages = PFN_UP(*addr + (*npages<<EFI_PAGE_SHIFT)) - PFN_DOWN(*addr);
1042         *addr &= PAGE_MASK;
1043 }
1044
1045 /*
1046  * EFI Variable support.
1047  *
1048  * Different firmware drivers can expose their EFI-like variables using
1049  * the following.
1050  */
1051
1052 struct efivar_operations {
1053         efi_get_variable_t *get_variable;
1054         efi_get_next_variable_t *get_next_variable;
1055         efi_set_variable_t *set_variable;
1056         efi_set_variable_t *set_variable_nonblocking;
1057         efi_query_variable_store_t *query_variable_store;
1058         efi_query_variable_info_t *query_variable_info;
1059 };
1060
1061 struct efivars {
1062         struct kset *kset;
1063         const struct efivar_operations *ops;
1064 };
1065
1066 #ifdef CONFIG_X86
1067 u64 __attribute_const__ efivar_reserved_space(void);
1068 #else
1069 static inline u64 efivar_reserved_space(void) { return 0; }
1070 #endif
1071
1072 /*
1073  * The maximum size of VariableName + Data = 1024
1074  * Therefore, it's reasonable to save that much
1075  * space in each part of the structure,
1076  * and we use a page for reading/writing.
1077  */
1078
1079 #define EFI_VAR_NAME_LEN        1024
1080
1081 int efivars_register(struct efivars *efivars,
1082                      const struct efivar_operations *ops);
1083 int efivars_unregister(struct efivars *efivars);
1084
1085 #ifdef CONFIG_EFI
1086 bool efivar_is_available(void);
1087 #else
1088 static inline bool efivar_is_available(void) { return false; }
1089 #endif
1090
1091 bool efivar_supports_writes(void);
1092
1093 int efivar_lock(void);
1094 int efivar_trylock(void);
1095 void efivar_unlock(void);
1096
1097 efi_status_t efivar_get_variable(efi_char16_t *name, efi_guid_t *vendor,
1098                                  u32 *attr, unsigned long *size, void *data);
1099
1100 efi_status_t efivar_get_next_variable(unsigned long *name_size,
1101                                       efi_char16_t *name, efi_guid_t *vendor);
1102
1103 efi_status_t efivar_set_variable_locked(efi_char16_t *name, efi_guid_t *vendor,
1104                                         u32 attr, unsigned long data_size,
1105                                         void *data, bool nonblocking);
1106
1107 efi_status_t efivar_set_variable(efi_char16_t *name, efi_guid_t *vendor,
1108                                  u32 attr, unsigned long data_size, void *data);
1109
1110 efi_status_t efivar_query_variable_info(u32 attr, u64 *storage_space,
1111                                         u64 *remaining_space,
1112                                         u64 *max_variable_size);
1113
1114 #if IS_ENABLED(CONFIG_EFI_CAPSULE_LOADER)
1115 extern bool efi_capsule_pending(int *reset_type);
1116
1117 extern int efi_capsule_supported(efi_guid_t guid, u32 flags,
1118                                  size_t size, int *reset);
1119
1120 extern int efi_capsule_update(efi_capsule_header_t *capsule,
1121                               phys_addr_t *pages);
1122 #else
1123 static inline bool efi_capsule_pending(int *reset_type) { return false; }
1124 #endif
1125
1126 #ifdef CONFIG_EFI
1127 extern bool efi_runtime_disabled(void);
1128 #else
1129 static inline bool efi_runtime_disabled(void) { return true; }
1130 #endif
1131
1132 extern void efi_call_virt_check_flags(unsigned long flags, const void *caller);
1133 extern unsigned long efi_call_virt_save_flags(void);
1134
1135 enum efi_secureboot_mode {
1136         efi_secureboot_mode_unset,
1137         efi_secureboot_mode_unknown,
1138         efi_secureboot_mode_disabled,
1139         efi_secureboot_mode_enabled,
1140 };
1141
1142 static inline
1143 enum efi_secureboot_mode efi_get_secureboot_mode(efi_get_variable_t *get_var)
1144 {
1145         u8 secboot, setupmode = 0;
1146         efi_status_t status;
1147         unsigned long size;
1148
1149         size = sizeof(secboot);
1150         status = get_var(L"SecureBoot", &EFI_GLOBAL_VARIABLE_GUID, NULL, &size,
1151                          &secboot);
1152         if (status == EFI_NOT_FOUND)
1153                 return efi_secureboot_mode_disabled;
1154         if (status != EFI_SUCCESS)
1155                 return efi_secureboot_mode_unknown;
1156
1157         size = sizeof(setupmode);
1158         get_var(L"SetupMode", &EFI_GLOBAL_VARIABLE_GUID, NULL, &size, &setupmode);
1159         if (secboot == 0 || setupmode == 1)
1160                 return efi_secureboot_mode_disabled;
1161         return efi_secureboot_mode_enabled;
1162 }
1163
1164 #ifdef CONFIG_EFI_EMBEDDED_FIRMWARE
1165 void efi_check_for_embedded_firmwares(void);
1166 #else
1167 static inline void efi_check_for_embedded_firmwares(void) { }
1168 #endif
1169
1170 #define arch_efi_call_virt(p, f, args...)       ((p)->f(args))
1171
1172 /*
1173  * Arch code must implement the following three routines:
1174  *
1175  *  * arch_efi_call_virt_setup()
1176  *
1177  *    Sets up the environment for the call (e.g. switching page tables,
1178  *    allowing kernel-mode use of floating point, if required).
1179  *
1180  *  * arch_efi_call_virt()
1181  *
1182  *    Performs the call. This routine takes a variable number of arguments so
1183  *    it must be implemented as a variadic preprocessor macro.
1184  *
1185  *  * arch_efi_call_virt_teardown()
1186  *
1187  *    Restores the usual kernel environment once the call has returned.
1188  */
1189
1190 #define efi_call_virt_pointer(p, f, args...)                            \
1191 ({                                                                      \
1192         typeof((p)->f(args)) __s;                                       \
1193         unsigned long __flags;                                          \
1194                                                                         \
1195         arch_efi_call_virt_setup();                                     \
1196                                                                         \
1197         __flags = efi_call_virt_save_flags();                           \
1198         __s = arch_efi_call_virt(p, f, args);                           \
1199         efi_call_virt_check_flags(__flags, NULL);                       \
1200                                                                         \
1201         arch_efi_call_virt_teardown();                                  \
1202                                                                         \
1203         __s;                                                            \
1204 })
1205
1206 #define EFI_RANDOM_SEED_SIZE            32U // BLAKE2S_HASH_SIZE
1207
1208 struct linux_efi_random_seed {
1209         u32     size;
1210         u8      bits[];
1211 };
1212
1213 struct linux_efi_tpm_eventlog {
1214         u32     size;
1215         u32     final_events_preboot_size;
1216         u8      version;
1217         u8      log[];
1218 };
1219
1220 extern int efi_tpm_eventlog_init(void);
1221
1222 struct efi_tcg2_final_events_table {
1223         u64 version;
1224         u64 nr_events;
1225         u8 events[];
1226 };
1227 extern int efi_tpm_final_log_size;
1228
1229 extern unsigned long rci2_table_phys;
1230
1231 efi_status_t
1232 efi_call_acpi_prm_handler(efi_status_t (__efiapi *handler_addr)(u64, void *),
1233                           u64 param_buffer_addr, void *context);
1234
1235 /*
1236  * efi_runtime_service() function identifiers.
1237  * "NONE" is used by efi_recover_from_page_fault() to check if the page
1238  * fault happened while executing an efi runtime service.
1239  */
1240 enum efi_rts_ids {
1241         EFI_NONE,
1242         EFI_GET_TIME,
1243         EFI_SET_TIME,
1244         EFI_GET_WAKEUP_TIME,
1245         EFI_SET_WAKEUP_TIME,
1246         EFI_GET_VARIABLE,
1247         EFI_GET_NEXT_VARIABLE,
1248         EFI_SET_VARIABLE,
1249         EFI_QUERY_VARIABLE_INFO,
1250         EFI_GET_NEXT_HIGH_MONO_COUNT,
1251         EFI_RESET_SYSTEM,
1252         EFI_UPDATE_CAPSULE,
1253         EFI_QUERY_CAPSULE_CAPS,
1254         EFI_ACPI_PRM_HANDLER,
1255 };
1256
1257 union efi_rts_args;
1258
1259 /*
1260  * efi_runtime_work:    Details of EFI Runtime Service work
1261  * @args:               Pointer to union describing the arguments
1262  * @status:             Status of executing EFI Runtime Service
1263  * @efi_rts_id:         EFI Runtime Service function identifier
1264  * @efi_rts_comp:       Struct used for handling completions
1265  * @caller:             The caller of the runtime service
1266  */
1267 struct efi_runtime_work {
1268         union efi_rts_args      *args;
1269         efi_status_t            status;
1270         struct work_struct      work;
1271         enum efi_rts_ids        efi_rts_id;
1272         struct completion       efi_rts_comp;
1273         const void              *caller;
1274 };
1275
1276 extern struct efi_runtime_work efi_rts_work;
1277
1278 /* Workqueue to queue EFI Runtime Services */
1279 extern struct workqueue_struct *efi_rts_wq;
1280
1281 struct linux_efi_memreserve {
1282         int             size;                   // allocated size of the array
1283         atomic_t        count;                  // number of entries used
1284         phys_addr_t     next;                   // pa of next struct instance
1285         struct {
1286                 phys_addr_t     base;
1287                 phys_addr_t     size;
1288         } entry[];
1289 };
1290
1291 #define EFI_MEMRESERVE_COUNT(size) (((size) - sizeof(struct linux_efi_memreserve)) \
1292         / sizeof_field(struct linux_efi_memreserve, entry[0]))
1293
1294 void __init efi_arch_mem_reserve(phys_addr_t addr, u64 size);
1295
1296 char *efi_systab_show_arch(char *str);
1297
1298 /*
1299  * The LINUX_EFI_MOK_VARIABLE_TABLE_GUID config table can be provided
1300  * to the kernel by an EFI boot loader. The table contains a packed
1301  * sequence of these entries, one for each named MOK variable.
1302  * The sequence is terminated by an entry with a completely NULL
1303  * name and 0 data size.
1304  */
1305 struct efi_mokvar_table_entry {
1306         char name[256];
1307         u64 data_size;
1308         u8 data[];
1309 } __attribute((packed));
1310
1311 #ifdef CONFIG_LOAD_UEFI_KEYS
1312 extern void __init efi_mokvar_table_init(void);
1313 extern struct efi_mokvar_table_entry *efi_mokvar_entry_next(
1314                         struct efi_mokvar_table_entry **mokvar_entry);
1315 extern struct efi_mokvar_table_entry *efi_mokvar_entry_find(const char *name);
1316 #else
1317 static inline void efi_mokvar_table_init(void) { }
1318 static inline struct efi_mokvar_table_entry *efi_mokvar_entry_next(
1319                         struct efi_mokvar_table_entry **mokvar_entry)
1320 {
1321         return NULL;
1322 }
1323 static inline struct efi_mokvar_table_entry *efi_mokvar_entry_find(
1324                         const char *name)
1325 {
1326         return NULL;
1327 }
1328 #endif
1329
1330 extern void efifb_setup_from_dmi(struct screen_info *si, const char *opt);
1331
1332 struct linux_efi_coco_secret_area {
1333         u64     base_pa;
1334         u64     size;
1335 };
1336
1337 struct linux_efi_initrd {
1338         unsigned long   base;
1339         unsigned long   size;
1340 };
1341
1342 /* Header of a populated EFI secret area */
1343 #define EFI_SECRET_TABLE_HEADER_GUID    EFI_GUID(0x1e74f542, 0x71dd, 0x4d66,  0x96, 0x3e, 0xef, 0x42, 0x87, 0xff, 0x17, 0x3b)
1344
1345 bool xen_efi_config_table_is_usable(const efi_guid_t *guid, unsigned long table);
1346
1347 static inline
1348 bool efi_config_table_is_usable(const efi_guid_t *guid, unsigned long table)
1349 {
1350         if (!IS_ENABLED(CONFIG_XEN_EFI))
1351                 return true;
1352         return xen_efi_config_table_is_usable(guid, table);
1353 }
1354
1355 umode_t efi_attr_is_visible(struct kobject *kobj, struct attribute *attr, int n);
1356
1357 #endif /* _LINUX_EFI_H */