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 | |
28 | #include <asm/page.h> |
29 | |
30 | struct screen_info; |
31 | |
32 | #define EFI_SUCCESS 0 |
33 | #define EFI_LOAD_ERROR ( 1 | (1UL << (BITS_PER_LONG-1))) |
34 | #define EFI_INVALID_PARAMETER ( 2 | (1UL << (BITS_PER_LONG-1))) |
35 | #define EFI_UNSUPPORTED ( 3 | (1UL << (BITS_PER_LONG-1))) |
36 | #define EFI_BAD_BUFFER_SIZE ( 4 | (1UL << (BITS_PER_LONG-1))) |
37 | #define EFI_BUFFER_TOO_SMALL ( 5 | (1UL << (BITS_PER_LONG-1))) |
38 | #define EFI_NOT_READY ( 6 | (1UL << (BITS_PER_LONG-1))) |
39 | #define EFI_DEVICE_ERROR ( 7 | (1UL << (BITS_PER_LONG-1))) |
40 | #define EFI_WRITE_PROTECTED ( 8 | (1UL << (BITS_PER_LONG-1))) |
41 | #define EFI_OUT_OF_RESOURCES ( 9 | (1UL << (BITS_PER_LONG-1))) |
42 | #define EFI_NOT_FOUND (14 | (1UL << (BITS_PER_LONG-1))) |
43 | #define EFI_ACCESS_DENIED (15 | (1UL << (BITS_PER_LONG-1))) |
44 | #define EFI_TIMEOUT (18 | (1UL << (BITS_PER_LONG-1))) |
45 | #define EFI_ABORTED (21 | (1UL << (BITS_PER_LONG-1))) |
46 | #define EFI_SECURITY_VIOLATION (26 | (1UL << (BITS_PER_LONG-1))) |
47 | |
48 | typedef unsigned long efi_status_t; |
49 | typedef u8 efi_bool_t; |
50 | typedef u16 efi_char16_t; /* UNICODE character */ |
51 | typedef u64 efi_physical_addr_t; |
52 | typedef void *efi_handle_t; |
53 | |
54 | #if defined(CONFIG_X86_64) |
55 | #define __efiapi __attribute__((ms_abi)) |
56 | #elif defined(CONFIG_X86_32) |
57 | #define __efiapi __attribute__((regparm(0))) |
58 | #else |
59 | #define __efiapi |
60 | #endif |
61 | |
62 | /* |
63 | * The UEFI spec and EDK2 reference implementation both define EFI_GUID as |
64 | * struct { u32 a; u16; b; u16 c; u8 d[8]; }; and so the implied alignment |
65 | * is 32 bits not 8 bits like our guid_t. In some cases (i.e., on 32-bit ARM), |
66 | * this means that firmware services invoked by the kernel may assume that |
67 | * efi_guid_t* arguments are 32-bit aligned, and use memory accessors that |
68 | * do not tolerate misalignment. So let's set the minimum alignment to 32 bits. |
69 | * |
70 | * Note that the UEFI spec as well as some comments in the EDK2 code base |
71 | * suggest that EFI_GUID should be 64-bit aligned, but this appears to be |
72 | * a mistake, given that no code seems to exist that actually enforces that |
73 | * or relies on it. |
74 | */ |
75 | typedef guid_t efi_guid_t __aligned(__alignof__(u32)); |
76 | |
77 | #define EFI_GUID(a, b, c, d...) (efi_guid_t){ { \ |
78 | (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \ |
79 | (b) & 0xff, ((b) >> 8) & 0xff, \ |
80 | (c) & 0xff, ((c) >> 8) & 0xff, d } } |
81 | |
82 | /* |
83 | * Generic EFI table header |
84 | */ |
85 | typedef struct { |
86 | u64 signature; |
87 | u32 revision; |
88 | u32 ; |
89 | u32 crc32; |
90 | u32 reserved; |
91 | } efi_table_hdr_t; |
92 | |
93 | /* |
94 | * Memory map descriptor: |
95 | */ |
96 | |
97 | /* Memory types: */ |
98 | #define EFI_RESERVED_TYPE 0 |
99 | #define EFI_LOADER_CODE 1 |
100 | #define EFI_LOADER_DATA 2 |
101 | #define EFI_BOOT_SERVICES_CODE 3 |
102 | #define EFI_BOOT_SERVICES_DATA 4 |
103 | #define EFI_RUNTIME_SERVICES_CODE 5 |
104 | #define EFI_RUNTIME_SERVICES_DATA 6 |
105 | #define EFI_CONVENTIONAL_MEMORY 7 |
106 | #define EFI_UNUSABLE_MEMORY 8 |
107 | #define EFI_ACPI_RECLAIM_MEMORY 9 |
108 | #define EFI_ACPI_MEMORY_NVS 10 |
109 | #define EFI_MEMORY_MAPPED_IO 11 |
110 | #define EFI_MEMORY_MAPPED_IO_PORT_SPACE 12 |
111 | #define EFI_PAL_CODE 13 |
112 | #define EFI_PERSISTENT_MEMORY 14 |
113 | #define EFI_UNACCEPTED_MEMORY 15 |
114 | #define EFI_MAX_MEMORY_TYPE 16 |
115 | |
116 | /* Attribute values: */ |
117 | #define EFI_MEMORY_UC ((u64)0x0000000000000001ULL) /* uncached */ |
118 | #define EFI_MEMORY_WC ((u64)0x0000000000000002ULL) /* write-coalescing */ |
119 | #define EFI_MEMORY_WT ((u64)0x0000000000000004ULL) /* write-through */ |
120 | #define EFI_MEMORY_WB ((u64)0x0000000000000008ULL) /* write-back */ |
121 | #define EFI_MEMORY_UCE ((u64)0x0000000000000010ULL) /* uncached, exported */ |
122 | #define EFI_MEMORY_WP ((u64)0x0000000000001000ULL) /* write-protect */ |
123 | #define EFI_MEMORY_RP ((u64)0x0000000000002000ULL) /* read-protect */ |
124 | #define EFI_MEMORY_XP ((u64)0x0000000000004000ULL) /* execute-protect */ |
125 | #define EFI_MEMORY_NV ((u64)0x0000000000008000ULL) /* non-volatile */ |
126 | #define EFI_MEMORY_MORE_RELIABLE \ |
127 | ((u64)0x0000000000010000ULL) /* higher reliability */ |
128 | #define EFI_MEMORY_RO ((u64)0x0000000000020000ULL) /* read-only */ |
129 | #define EFI_MEMORY_SP ((u64)0x0000000000040000ULL) /* soft reserved */ |
130 | #define EFI_MEMORY_CPU_CRYPTO ((u64)0x0000000000080000ULL) /* supports encryption */ |
131 | #define EFI_MEMORY_RUNTIME ((u64)0x8000000000000000ULL) /* range requires runtime mapping */ |
132 | #define EFI_MEMORY_DESCRIPTOR_VERSION 1 |
133 | |
134 | #define EFI_PAGE_SHIFT 12 |
135 | #define EFI_PAGE_SIZE (1UL << EFI_PAGE_SHIFT) |
136 | #define EFI_PAGES_MAX (U64_MAX >> EFI_PAGE_SHIFT) |
137 | |
138 | typedef struct { |
139 | u32 type; |
140 | u32 pad; |
141 | u64 phys_addr; |
142 | u64 virt_addr; |
143 | u64 num_pages; |
144 | u64 attribute; |
145 | } efi_memory_desc_t; |
146 | |
147 | typedef struct { |
148 | efi_guid_t ; |
149 | u32 ; |
150 | u32 ; |
151 | u32 ; |
152 | } ; |
153 | |
154 | /* EFI_FIRMWARE_MANAGEMENT_CAPSULE_HEADER */ |
155 | struct { |
156 | u32 ; |
157 | u16 ; |
158 | u16 ; |
159 | /* |
160 | * Variable-size array of the size given by the sum of |
161 | * emb_drv_cnt and payload_cnt. |
162 | */ |
163 | u64 []; |
164 | } __packed; |
165 | |
166 | /* EFI_FIRMWARE_MANAGEMENT_CAPSULE_IMAGE_HEADER */ |
167 | struct { |
168 | u32 ; |
169 | efi_guid_t ; |
170 | u8 ; |
171 | u8 [3]; |
172 | u32 ; |
173 | u32 ; |
174 | /* hw_ins was introduced in version 2 */ |
175 | u64 ; |
176 | /* capsule_support was introduced in version 3 */ |
177 | u64 ; |
178 | } __packed; |
179 | |
180 | /* WIN_CERTIFICATE */ |
181 | struct win_cert { |
182 | u32 len; |
183 | u16 rev; |
184 | u16 cert_type; |
185 | }; |
186 | |
187 | /* WIN_CERTIFICATE_UEFI_GUID */ |
188 | struct win_cert_uefi_guid { |
189 | struct win_cert hdr; |
190 | efi_guid_t cert_type; |
191 | u8 cert_data[]; |
192 | }; |
193 | |
194 | /* EFI_FIRMWARE_IMAGE_AUTHENTICATION */ |
195 | struct efi_image_auth { |
196 | u64 mon_count; |
197 | struct win_cert_uefi_guid auth_info; |
198 | }; |
199 | |
200 | /* |
201 | * EFI capsule flags |
202 | */ |
203 | #define EFI_CAPSULE_PERSIST_ACROSS_RESET 0x00010000 |
204 | #define EFI_CAPSULE_POPULATE_SYSTEM_TABLE 0x00020000 |
205 | #define EFI_CAPSULE_INITIATE_RESET 0x00040000 |
206 | |
207 | struct capsule_info { |
208 | efi_capsule_header_t ; |
209 | efi_capsule_header_t *capsule; |
210 | int reset_type; |
211 | long index; |
212 | size_t count; |
213 | size_t total_size; |
214 | struct page **pages; |
215 | phys_addr_t *phys; |
216 | size_t page_bytes_remain; |
217 | }; |
218 | |
219 | int efi_capsule_setup_info(struct capsule_info *cap_info, void *kbuff, |
220 | size_t hdr_bytes); |
221 | int __efi_capsule_setup_info(struct capsule_info *cap_info); |
222 | |
223 | /* |
224 | * Types and defines for Time Services |
225 | */ |
226 | #define EFI_TIME_ADJUST_DAYLIGHT 0x1 |
227 | #define EFI_TIME_IN_DAYLIGHT 0x2 |
228 | #define EFI_UNSPECIFIED_TIMEZONE 0x07ff |
229 | |
230 | typedef struct { |
231 | u16 year; |
232 | u8 month; |
233 | u8 day; |
234 | u8 hour; |
235 | u8 minute; |
236 | u8 second; |
237 | u8 pad1; |
238 | u32 nanosecond; |
239 | s16 timezone; |
240 | u8 daylight; |
241 | u8 pad2; |
242 | } efi_time_t; |
243 | |
244 | typedef struct { |
245 | u32 resolution; |
246 | u32 accuracy; |
247 | u8 sets_to_zero; |
248 | } efi_time_cap_t; |
249 | |
250 | typedef union efi_boot_services efi_boot_services_t; |
251 | |
252 | /* |
253 | * Types and defines for EFI ResetSystem |
254 | */ |
255 | #define EFI_RESET_COLD 0 |
256 | #define EFI_RESET_WARM 1 |
257 | #define EFI_RESET_SHUTDOWN 2 |
258 | |
259 | /* |
260 | * EFI Runtime Services table |
261 | */ |
262 | #define EFI_RUNTIME_SERVICES_SIGNATURE ((u64)0x5652453544e5552ULL) |
263 | #define EFI_RUNTIME_SERVICES_REVISION 0x00010000 |
264 | |
265 | typedef struct { |
266 | efi_table_hdr_t hdr; |
267 | u32 get_time; |
268 | u32 set_time; |
269 | u32 get_wakeup_time; |
270 | u32 set_wakeup_time; |
271 | u32 set_virtual_address_map; |
272 | u32 convert_pointer; |
273 | u32 get_variable; |
274 | u32 get_next_variable; |
275 | u32 set_variable; |
276 | u32 get_next_high_mono_count; |
277 | u32 reset_system; |
278 | u32 update_capsule; |
279 | u32 query_capsule_caps; |
280 | u32 query_variable_info; |
281 | } efi_runtime_services_32_t; |
282 | |
283 | typedef efi_status_t efi_get_time_t (efi_time_t *tm, efi_time_cap_t *tc); |
284 | typedef efi_status_t efi_set_time_t (efi_time_t *tm); |
285 | typedef efi_status_t efi_get_wakeup_time_t (efi_bool_t *enabled, efi_bool_t *pending, |
286 | efi_time_t *tm); |
287 | typedef efi_status_t efi_set_wakeup_time_t (efi_bool_t enabled, efi_time_t *tm); |
288 | typedef efi_status_t efi_get_variable_t (efi_char16_t *name, efi_guid_t *vendor, u32 *attr, |
289 | unsigned long *data_size, void *data); |
290 | typedef efi_status_t efi_get_next_variable_t (unsigned long *name_size, efi_char16_t *name, |
291 | efi_guid_t *vendor); |
292 | typedef efi_status_t efi_set_variable_t (efi_char16_t *name, efi_guid_t *vendor, |
293 | u32 attr, unsigned long data_size, |
294 | void *data); |
295 | typedef efi_status_t efi_get_next_high_mono_count_t (u32 *count); |
296 | typedef void efi_reset_system_t (int reset_type, efi_status_t status, |
297 | unsigned long data_size, efi_char16_t *data); |
298 | typedef efi_status_t efi_set_virtual_address_map_t (unsigned long memory_map_size, |
299 | unsigned long descriptor_size, |
300 | u32 descriptor_version, |
301 | efi_memory_desc_t *virtual_map); |
302 | typedef efi_status_t efi_query_variable_info_t(u32 attr, |
303 | u64 *storage_space, |
304 | u64 *remaining_space, |
305 | u64 *max_variable_size); |
306 | typedef efi_status_t efi_update_capsule_t(efi_capsule_header_t **capsules, |
307 | unsigned long count, |
308 | unsigned long sg_list); |
309 | typedef efi_status_t efi_query_capsule_caps_t(efi_capsule_header_t **capsules, |
310 | unsigned long count, |
311 | u64 *max_size, |
312 | int *reset_type); |
313 | typedef efi_status_t efi_query_variable_store_t(u32 attributes, |
314 | unsigned long size, |
315 | bool nonblocking); |
316 | |
317 | typedef union { |
318 | struct { |
319 | efi_table_hdr_t hdr; |
320 | efi_get_time_t __efiapi *get_time; |
321 | efi_set_time_t __efiapi *set_time; |
322 | efi_get_wakeup_time_t __efiapi *get_wakeup_time; |
323 | efi_set_wakeup_time_t __efiapi *set_wakeup_time; |
324 | efi_set_virtual_address_map_t __efiapi *set_virtual_address_map; |
325 | void *convert_pointer; |
326 | efi_get_variable_t __efiapi *get_variable; |
327 | efi_get_next_variable_t __efiapi *get_next_variable; |
328 | efi_set_variable_t __efiapi *set_variable; |
329 | efi_get_next_high_mono_count_t __efiapi *get_next_high_mono_count; |
330 | efi_reset_system_t __efiapi *reset_system; |
331 | efi_update_capsule_t __efiapi *update_capsule; |
332 | efi_query_capsule_caps_t __efiapi *query_capsule_caps; |
333 | efi_query_variable_info_t __efiapi *query_variable_info; |
334 | }; |
335 | efi_runtime_services_32_t mixed_mode; |
336 | } efi_runtime_services_t; |
337 | |
338 | void efi_native_runtime_setup(void); |
339 | |
340 | /* |
341 | * EFI Configuration Table and GUID definitions |
342 | * |
343 | * These are all defined in a single line to make them easier to |
344 | * grep for and to see them at a glance - while still having a |
345 | * similar structure to the definitions in the spec. |
346 | * |
347 | * Here's how they are structured: |
348 | * |
349 | * GUID: 12345678-1234-1234-1234-123456789012 |
350 | * Spec: |
351 | * #define EFI_SOME_PROTOCOL_GUID \ |
352 | * {0x12345678,0x1234,0x1234,\ |
353 | * {0x12,0x34,0x12,0x34,0x56,0x78,0x90,0x12}} |
354 | * Here: |
355 | * #define SOME_PROTOCOL_GUID EFI_GUID(0x12345678, 0x1234, 0x1234, 0x12, 0x34, 0x12, 0x34, 0x56, 0x78, 0x90, 0x12) |
356 | * ^ tabs ^extra space |
357 | * |
358 | * Note that the 'extra space' separates the values at the same place |
359 | * where the UEFI SPEC breaks the line. |
360 | */ |
361 | #define NULL_GUID EFI_GUID(0x00000000, 0x0000, 0x0000, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00) |
362 | #define ACPI_TABLE_GUID EFI_GUID(0xeb9d2d30, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d) |
363 | #define ACPI_20_TABLE_GUID EFI_GUID(0x8868e871, 0xe4f1, 0x11d3, 0xbc, 0x22, 0x00, 0x80, 0xc7, 0x3c, 0x88, 0x81) |
364 | #define SMBIOS_TABLE_GUID EFI_GUID(0xeb9d2d31, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d) |
365 | #define SMBIOS3_TABLE_GUID EFI_GUID(0xf2fd1544, 0x9794, 0x4a2c, 0x99, 0x2e, 0xe5, 0xbb, 0xcf, 0x20, 0xe3, 0x94) |
366 | #define UGA_IO_PROTOCOL_GUID EFI_GUID(0x61a4d49e, 0x6f68, 0x4f1b, 0xb9, 0x22, 0xa8, 0x6e, 0xed, 0x0b, 0x07, 0xa2) |
367 | #define EFI_GLOBAL_VARIABLE_GUID EFI_GUID(0x8be4df61, 0x93ca, 0x11d2, 0xaa, 0x0d, 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c) |
368 | #define UV_SYSTEM_TABLE_GUID EFI_GUID(0x3b13a7d4, 0x633e, 0x11dd, 0x93, 0xec, 0xda, 0x25, 0x56, 0xd8, 0x95, 0x93) |
369 | #define LINUX_EFI_CRASH_GUID EFI_GUID(0xcfc8fc79, 0xbe2e, 0x4ddc, 0x97, 0xf0, 0x9f, 0x98, 0xbf, 0xe2, 0x98, 0xa0) |
370 | #define LOADED_IMAGE_PROTOCOL_GUID EFI_GUID(0x5b1b31a1, 0x9562, 0x11d2, 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b) |
371 | #define LOADED_IMAGE_DEVICE_PATH_PROTOCOL_GUID EFI_GUID(0xbc62157e, 0x3e33, 0x4fec, 0x99, 0x20, 0x2d, 0x3b, 0x36, 0xd7, 0x50, 0xdf) |
372 | #define EFI_DEVICE_PATH_PROTOCOL_GUID EFI_GUID(0x09576e91, 0x6d3f, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b) |
373 | #define EFI_DEVICE_PATH_TO_TEXT_PROTOCOL_GUID EFI_GUID(0x8b843e20, 0x8132, 0x4852, 0x90, 0xcc, 0x55, 0x1a, 0x4e, 0x4a, 0x7f, 0x1c) |
374 | #define EFI_DEVICE_PATH_FROM_TEXT_PROTOCOL_GUID EFI_GUID(0x05c99a21, 0xc70f, 0x4ad2, 0x8a, 0x5f, 0x35, 0xdf, 0x33, 0x43, 0xf5, 0x1e) |
375 | #define EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID EFI_GUID(0x9042a9de, 0x23dc, 0x4a38, 0x96, 0xfb, 0x7a, 0xde, 0xd0, 0x80, 0x51, 0x6a) |
376 | #define EFI_UGA_PROTOCOL_GUID EFI_GUID(0x982c298b, 0xf4fa, 0x41cb, 0xb8, 0x38, 0x77, 0xaa, 0x68, 0x8f, 0xb8, 0x39) |
377 | #define EFI_PCI_IO_PROTOCOL_GUID EFI_GUID(0x4cf5b200, 0x68b8, 0x4ca5, 0x9e, 0xec, 0xb2, 0x3e, 0x3f, 0x50, 0x02, 0x9a) |
378 | #define EFI_FILE_INFO_ID EFI_GUID(0x09576e92, 0x6d3f, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b) |
379 | #define EFI_SYSTEM_RESOURCE_TABLE_GUID EFI_GUID(0xb122a263, 0x3661, 0x4f68, 0x99, 0x29, 0x78, 0xf8, 0xb0, 0xd6, 0x21, 0x80) |
380 | #define EFI_FILE_SYSTEM_GUID EFI_GUID(0x964e5b22, 0x6459, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b) |
381 | #define DEVICE_TREE_GUID EFI_GUID(0xb1b621d5, 0xf19c, 0x41a5, 0x83, 0x0b, 0xd9, 0x15, 0x2c, 0x69, 0xaa, 0xe0) |
382 | #define EFI_PROPERTIES_TABLE_GUID EFI_GUID(0x880aaca3, 0x4adc, 0x4a04, 0x90, 0x79, 0xb7, 0x47, 0x34, 0x08, 0x25, 0xe5) |
383 | #define EFI_RNG_PROTOCOL_GUID EFI_GUID(0x3152bca5, 0xeade, 0x433d, 0x86, 0x2e, 0xc0, 0x1c, 0xdc, 0x29, 0x1f, 0x44) |
384 | #define EFI_RNG_ALGORITHM_RAW EFI_GUID(0xe43176d7, 0xb6e8, 0x4827, 0xb7, 0x84, 0x7f, 0xfd, 0xc4, 0xb6, 0x85, 0x61) |
385 | #define EFI_MEMORY_ATTRIBUTES_TABLE_GUID EFI_GUID(0xdcfa911d, 0x26eb, 0x469f, 0xa2, 0x20, 0x38, 0xb7, 0xdc, 0x46, 0x12, 0x20) |
386 | #define EFI_CONSOLE_OUT_DEVICE_GUID EFI_GUID(0xd3b36f2c, 0xd551, 0x11d4, 0x9a, 0x46, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d) |
387 | #define APPLE_PROPERTIES_PROTOCOL_GUID EFI_GUID(0x91bd12fe, 0xf6c3, 0x44fb, 0xa5, 0xb7, 0x51, 0x22, 0xab, 0x30, 0x3a, 0xe0) |
388 | #define EFI_TCG2_PROTOCOL_GUID EFI_GUID(0x607f766c, 0x7455, 0x42be, 0x93, 0x0b, 0xe4, 0xd7, 0x6d, 0xb2, 0x72, 0x0f) |
389 | #define EFI_TCG2_FINAL_EVENTS_TABLE_GUID EFI_GUID(0x1e2ed096, 0x30e2, 0x4254, 0xbd, 0x89, 0x86, 0x3b, 0xbe, 0xf8, 0x23, 0x25) |
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 | #define EFI_CC_MEASUREMENT_PROTOCOL_GUID EFI_GUID(0x96751a3d, 0x72f4, 0x41a6, 0xa7, 0x94, 0xed, 0x5d, 0x0e, 0x67, 0xae, 0x6b) |
405 | #define EFI_CC_FINAL_EVENTS_TABLE_GUID EFI_GUID(0xdd4a4648, 0x2de7, 0x4665, 0x96, 0x4d, 0x21, 0xd9, 0xef, 0x5f, 0xb4, 0x46) |
406 | |
407 | /* |
408 | * This GUID is used to pass to the kernel proper the struct screen_info |
409 | * structure that was populated by the stub based on the GOP protocol instance |
410 | * associated with ConOut |
411 | */ |
412 | #define LINUX_EFI_SCREEN_INFO_TABLE_GUID EFI_GUID(0xe03fc20a, 0x85dc, 0x406e, 0xb9, 0x0e, 0x4a, 0xb5, 0x02, 0x37, 0x1d, 0x95) |
413 | #define LINUX_EFI_ARM_CPU_STATE_TABLE_GUID EFI_GUID(0xef79e4aa, 0x3c3d, 0x4989, 0xb9, 0x02, 0x07, 0xa9, 0x43, 0xe5, 0x50, 0xd2) |
414 | #define LINUX_EFI_LOADER_ENTRY_GUID EFI_GUID(0x4a67b082, 0x0a4c, 0x41cf, 0xb6, 0xc7, 0x44, 0x0b, 0x29, 0xbb, 0x8c, 0x4f) |
415 | #define LINUX_EFI_RANDOM_SEED_TABLE_GUID EFI_GUID(0x1ce1e5bc, 0x7ceb, 0x42f2, 0x81, 0xe5, 0x8a, 0xad, 0xf1, 0x80, 0xf5, 0x7b) |
416 | #define LINUX_EFI_TPM_EVENT_LOG_GUID EFI_GUID(0xb7799cb0, 0xeca2, 0x4943, 0x96, 0x67, 0x1f, 0xae, 0x07, 0xb7, 0x47, 0xfa) |
417 | #define LINUX_EFI_MEMRESERVE_TABLE_GUID EFI_GUID(0x888eb0c6, 0x8ede, 0x4ff5, 0xa8, 0xf0, 0x9a, 0xee, 0x5c, 0xb9, 0x77, 0xc2) |
418 | #define LINUX_EFI_INITRD_MEDIA_GUID EFI_GUID(0x5568e427, 0x68fc, 0x4f3d, 0xac, 0x74, 0xca, 0x55, 0x52, 0x31, 0xcc, 0x68) |
419 | #define LINUX_EFI_MOK_VARIABLE_TABLE_GUID EFI_GUID(0xc451ed2b, 0x9694, 0x45d3, 0xba, 0xba, 0xed, 0x9f, 0x89, 0x88, 0xa3, 0x89) |
420 | #define LINUX_EFI_COCO_SECRET_AREA_GUID EFI_GUID(0xadf956ad, 0xe98c, 0x484c, 0xae, 0x11, 0xb5, 0x1c, 0x7d, 0x33, 0x64, 0x47) |
421 | #define LINUX_EFI_BOOT_MEMMAP_GUID EFI_GUID(0x800f683f, 0xd08b, 0x423a, 0xa2, 0x93, 0x96, 0x5c, 0x3c, 0x6f, 0xe2, 0xb4) |
422 | #define LINUX_EFI_UNACCEPTED_MEM_TABLE_GUID EFI_GUID(0xd5d1de3c, 0x105c, 0x44f9, 0x9e, 0xa9, 0xbc, 0xef, 0x98, 0x12, 0x00, 0x31) |
423 | |
424 | #define RISCV_EFI_BOOT_PROTOCOL_GUID EFI_GUID(0xccd15fec, 0x6f73, 0x4eec, 0x83, 0x95, 0x3e, 0x69, 0xe4, 0xb9, 0x40, 0xbf) |
425 | |
426 | /* |
427 | * This GUID may be installed onto the kernel image's handle as a NULL protocol |
428 | * to signal to the stub that the placement of the image should be respected, |
429 | * and moving the image in physical memory is undesirable. To ensure |
430 | * compatibility with 64k pages kernels with virtually mapped stacks, and to |
431 | * avoid defeating physical randomization, this protocol should only be |
432 | * installed if the image was placed at a randomized 128k aligned address in |
433 | * memory. |
434 | */ |
435 | #define LINUX_EFI_LOADED_IMAGE_FIXED_GUID EFI_GUID(0xf5a37b6d, 0x3344, 0x42a5, 0xb6, 0xbb, 0x97, 0x86, 0x48, 0xc1, 0x89, 0x0a) |
436 | |
437 | /* OEM GUIDs */ |
438 | #define DELLEMC_EFI_RCI2_TABLE_GUID EFI_GUID(0x2d9f28a2, 0xa886, 0x456a, 0x97, 0xa8, 0xf1, 0x1e, 0xf2, 0x4f, 0xf4, 0x55) |
439 | #define AMD_SEV_MEM_ENCRYPT_GUID EFI_GUID(0x0cf29b71, 0x9e51, 0x433a, 0xa3, 0xb7, 0x81, 0xf3, 0xab, 0x16, 0xb8, 0x75) |
440 | |
441 | /* OVMF protocol GUIDs */ |
442 | #define OVMF_SEV_MEMORY_ACCEPTANCE_PROTOCOL_GUID EFI_GUID(0xc5a010fe, 0x38a7, 0x4531, 0x8a, 0x4a, 0x05, 0x00, 0xd2, 0xfd, 0x16, 0x49) |
443 | |
444 | typedef struct { |
445 | efi_guid_t guid; |
446 | u64 table; |
447 | } efi_config_table_64_t; |
448 | |
449 | typedef struct { |
450 | efi_guid_t guid; |
451 | u32 table; |
452 | } efi_config_table_32_t; |
453 | |
454 | typedef union { |
455 | struct { |
456 | efi_guid_t guid; |
457 | void *table; |
458 | }; |
459 | efi_config_table_32_t mixed_mode; |
460 | } efi_config_table_t; |
461 | |
462 | typedef struct { |
463 | efi_guid_t guid; |
464 | unsigned long *ptr; |
465 | const char name[16]; |
466 | } efi_config_table_type_t; |
467 | |
468 | #define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL) |
469 | #define EFI_DXE_SERVICES_TABLE_SIGNATURE ((u64)0x565245535f455844ULL) |
470 | |
471 | #define EFI_2_30_SYSTEM_TABLE_REVISION ((2 << 16) | (30)) |
472 | #define EFI_2_20_SYSTEM_TABLE_REVISION ((2 << 16) | (20)) |
473 | #define EFI_2_10_SYSTEM_TABLE_REVISION ((2 << 16) | (10)) |
474 | #define EFI_2_00_SYSTEM_TABLE_REVISION ((2 << 16) | (00)) |
475 | #define EFI_1_10_SYSTEM_TABLE_REVISION ((1 << 16) | (10)) |
476 | #define EFI_1_02_SYSTEM_TABLE_REVISION ((1 << 16) | (02)) |
477 | |
478 | typedef struct { |
479 | efi_table_hdr_t hdr; |
480 | u64 fw_vendor; /* physical addr of CHAR16 vendor string */ |
481 | u32 fw_revision; |
482 | u32 __pad1; |
483 | u64 con_in_handle; |
484 | u64 con_in; |
485 | u64 con_out_handle; |
486 | u64 con_out; |
487 | u64 stderr_handle; |
488 | u64 stderr; |
489 | u64 runtime; |
490 | u64 boottime; |
491 | u32 nr_tables; |
492 | u32 __pad2; |
493 | u64 tables; |
494 | } efi_system_table_64_t; |
495 | |
496 | typedef struct { |
497 | efi_table_hdr_t hdr; |
498 | u32 fw_vendor; /* physical addr of CHAR16 vendor string */ |
499 | u32 fw_revision; |
500 | u32 con_in_handle; |
501 | u32 con_in; |
502 | u32 con_out_handle; |
503 | u32 con_out; |
504 | u32 stderr_handle; |
505 | u32 stderr; |
506 | u32 runtime; |
507 | u32 boottime; |
508 | u32 nr_tables; |
509 | u32 tables; |
510 | } efi_system_table_32_t; |
511 | |
512 | typedef union efi_simple_text_input_protocol efi_simple_text_input_protocol_t; |
513 | typedef union efi_simple_text_output_protocol efi_simple_text_output_protocol_t; |
514 | |
515 | typedef union { |
516 | struct { |
517 | efi_table_hdr_t hdr; |
518 | unsigned long fw_vendor; /* physical addr of CHAR16 vendor string */ |
519 | u32 fw_revision; |
520 | unsigned long con_in_handle; |
521 | efi_simple_text_input_protocol_t *con_in; |
522 | unsigned long con_out_handle; |
523 | efi_simple_text_output_protocol_t *con_out; |
524 | unsigned long stderr_handle; |
525 | unsigned long stderr; |
526 | efi_runtime_services_t *runtime; |
527 | efi_boot_services_t *boottime; |
528 | unsigned long nr_tables; |
529 | unsigned long tables; |
530 | }; |
531 | efi_system_table_32_t mixed_mode; |
532 | } efi_system_table_t; |
533 | |
534 | struct efi_boot_memmap { |
535 | unsigned long map_size; |
536 | unsigned long desc_size; |
537 | u32 desc_ver; |
538 | unsigned long map_key; |
539 | unsigned long buff_size; |
540 | efi_memory_desc_t map[]; |
541 | }; |
542 | |
543 | struct efi_unaccepted_memory { |
544 | u32 version; |
545 | u32 unit_size; |
546 | u64 phys_base; |
547 | u64 size; |
548 | unsigned long bitmap[]; |
549 | }; |
550 | |
551 | /* |
552 | * Architecture independent structure for describing a memory map for the |
553 | * benefit of efi_memmap_init_early(), and for passing context between |
554 | * efi_memmap_alloc() and efi_memmap_install(). |
555 | */ |
556 | struct efi_memory_map_data { |
557 | phys_addr_t phys_map; |
558 | unsigned long size; |
559 | unsigned long desc_version; |
560 | unsigned long desc_size; |
561 | unsigned long flags; |
562 | }; |
563 | |
564 | struct efi_memory_map { |
565 | phys_addr_t phys_map; |
566 | void *map; |
567 | void *map_end; |
568 | int nr_map; |
569 | unsigned long desc_version; |
570 | unsigned long desc_size; |
571 | #define EFI_MEMMAP_LATE (1UL << 0) |
572 | #define EFI_MEMMAP_MEMBLOCK (1UL << 1) |
573 | #define EFI_MEMMAP_SLAB (1UL << 2) |
574 | unsigned long flags; |
575 | }; |
576 | |
577 | struct efi_mem_range { |
578 | struct range range; |
579 | u64 attribute; |
580 | }; |
581 | |
582 | typedef struct { |
583 | u32 version; |
584 | u32 length; |
585 | u64 memory_protection_attribute; |
586 | } efi_properties_table_t; |
587 | |
588 | #define EFI_PROPERTIES_TABLE_VERSION 0x00010000 |
589 | #define EFI_PROPERTIES_RUNTIME_MEMORY_PROTECTION_NON_EXECUTABLE_PE_DATA 0x1 |
590 | |
591 | typedef struct { |
592 | u16 version; |
593 | u16 length; |
594 | u32 runtime_services_supported; |
595 | } efi_rt_properties_table_t; |
596 | |
597 | #define EFI_RT_PROPERTIES_TABLE_VERSION 0x1 |
598 | |
599 | #define EFI_INVALID_TABLE_ADDR (~0UL) |
600 | |
601 | // BIT0 implies that Runtime code includes the forward control flow guard |
602 | // instruction, such as X86 CET-IBT or ARM BTI. |
603 | #define EFI_MEMORY_ATTRIBUTES_FLAGS_RT_FORWARD_CONTROL_FLOW_GUARD 0x1 |
604 | |
605 | typedef struct { |
606 | u32 version; |
607 | u32 num_entries; |
608 | u32 desc_size; |
609 | u32 flags; |
610 | efi_memory_desc_t entry[0]; |
611 | } efi_memory_attributes_table_t; |
612 | |
613 | typedef struct { |
614 | efi_guid_t signature_owner; |
615 | u8 signature_data[]; |
616 | } efi_signature_data_t; |
617 | |
618 | typedef struct { |
619 | efi_guid_t signature_type; |
620 | u32 signature_list_size; |
621 | u32 ; |
622 | u32 signature_size; |
623 | u8 []; |
624 | /* efi_signature_data_t signatures[][] */ |
625 | } efi_signature_list_t; |
626 | |
627 | typedef u8 efi_sha256_hash_t[32]; |
628 | |
629 | typedef struct { |
630 | efi_sha256_hash_t to_be_signed_hash; |
631 | efi_time_t time_of_revocation; |
632 | } efi_cert_x509_sha256_t; |
633 | |
634 | extern unsigned long __ro_after_init efi_rng_seed; /* RNG Seed table */ |
635 | |
636 | /* |
637 | * All runtime access to EFI goes through this structure: |
638 | */ |
639 | extern struct efi { |
640 | const efi_runtime_services_t *runtime; /* EFI runtime services table */ |
641 | unsigned int runtime_version; /* Runtime services version */ |
642 | unsigned int runtime_supported_mask; |
643 | |
644 | unsigned long acpi; /* ACPI table (IA64 ext 0.71) */ |
645 | unsigned long acpi20; /* ACPI table (ACPI 2.0) */ |
646 | unsigned long smbios; /* SMBIOS table (32 bit entry point) */ |
647 | unsigned long smbios3; /* SMBIOS table (64 bit entry point) */ |
648 | unsigned long esrt; /* ESRT table */ |
649 | unsigned long tpm_log; /* TPM2 Event Log table */ |
650 | unsigned long tpm_final_log; /* TPM2 Final Events Log table */ |
651 | unsigned long mokvar_table; /* MOK variable config table */ |
652 | unsigned long coco_secret; /* Confidential computing secret table */ |
653 | unsigned long unaccepted; /* Unaccepted memory table */ |
654 | |
655 | efi_get_time_t *get_time; |
656 | efi_set_time_t *set_time; |
657 | efi_get_wakeup_time_t *get_wakeup_time; |
658 | efi_set_wakeup_time_t *set_wakeup_time; |
659 | efi_get_variable_t *get_variable; |
660 | efi_get_next_variable_t *get_next_variable; |
661 | efi_set_variable_t *set_variable; |
662 | efi_set_variable_t *set_variable_nonblocking; |
663 | efi_query_variable_info_t *query_variable_info; |
664 | efi_query_variable_info_t *query_variable_info_nonblocking; |
665 | efi_update_capsule_t *update_capsule; |
666 | efi_query_capsule_caps_t *query_capsule_caps; |
667 | efi_get_next_high_mono_count_t *get_next_high_mono_count; |
668 | efi_reset_system_t *reset_system; |
669 | |
670 | struct efi_memory_map memmap; |
671 | unsigned long flags; |
672 | } efi; |
673 | |
674 | #define EFI_RT_SUPPORTED_GET_TIME 0x0001 |
675 | #define EFI_RT_SUPPORTED_SET_TIME 0x0002 |
676 | #define EFI_RT_SUPPORTED_GET_WAKEUP_TIME 0x0004 |
677 | #define EFI_RT_SUPPORTED_SET_WAKEUP_TIME 0x0008 |
678 | #define EFI_RT_SUPPORTED_GET_VARIABLE 0x0010 |
679 | #define EFI_RT_SUPPORTED_GET_NEXT_VARIABLE_NAME 0x0020 |
680 | #define EFI_RT_SUPPORTED_SET_VARIABLE 0x0040 |
681 | #define EFI_RT_SUPPORTED_SET_VIRTUAL_ADDRESS_MAP 0x0080 |
682 | #define EFI_RT_SUPPORTED_CONVERT_POINTER 0x0100 |
683 | #define EFI_RT_SUPPORTED_GET_NEXT_HIGH_MONOTONIC_COUNT 0x0200 |
684 | #define EFI_RT_SUPPORTED_RESET_SYSTEM 0x0400 |
685 | #define EFI_RT_SUPPORTED_UPDATE_CAPSULE 0x0800 |
686 | #define EFI_RT_SUPPORTED_QUERY_CAPSULE_CAPABILITIES 0x1000 |
687 | #define EFI_RT_SUPPORTED_QUERY_VARIABLE_INFO 0x2000 |
688 | |
689 | #define EFI_RT_SUPPORTED_ALL 0x3fff |
690 | |
691 | #define EFI_RT_SUPPORTED_TIME_SERVICES 0x0003 |
692 | #define EFI_RT_SUPPORTED_WAKEUP_SERVICES 0x000c |
693 | #define EFI_RT_SUPPORTED_VARIABLE_SERVICES 0x0070 |
694 | |
695 | extern struct mm_struct efi_mm; |
696 | |
697 | static inline bool mm_is_efi(struct mm_struct *mm) |
698 | { |
699 | return IS_ENABLED(CONFIG_EFI) && mm == &efi_mm; |
700 | } |
701 | |
702 | static inline int |
703 | efi_guidcmp (efi_guid_t left, efi_guid_t right) |
704 | { |
705 | return memcmp(p: &left, q: &right, size: sizeof (efi_guid_t)); |
706 | } |
707 | |
708 | static inline char * |
709 | efi_guid_to_str(efi_guid_t *guid, char *out) |
710 | { |
711 | sprintf(buf: out, fmt: "%pUl" , guid->b); |
712 | return out; |
713 | } |
714 | |
715 | extern void efi_init (void); |
716 | extern void efi_earlycon_reprobe(void); |
717 | #ifdef CONFIG_EFI |
718 | extern void efi_enter_virtual_mode (void); /* switch EFI to virtual mode, if possible */ |
719 | #else |
720 | static inline void efi_enter_virtual_mode (void) {} |
721 | #endif |
722 | #ifdef CONFIG_X86 |
723 | extern efi_status_t efi_query_variable_store(u32 attributes, |
724 | unsigned long size, |
725 | bool nonblocking); |
726 | #else |
727 | |
728 | static inline efi_status_t efi_query_variable_store(u32 attributes, |
729 | unsigned long size, |
730 | bool nonblocking) |
731 | { |
732 | return EFI_SUCCESS; |
733 | } |
734 | #endif |
735 | |
736 | extern int __init __efi_memmap_init(struct efi_memory_map_data *data); |
737 | extern int __init efi_memmap_init_early(struct efi_memory_map_data *data); |
738 | extern int __init efi_memmap_init_late(phys_addr_t addr, unsigned long size); |
739 | extern void __init efi_memmap_unmap(void); |
740 | |
741 | #ifdef CONFIG_EFI_ESRT |
742 | extern void __init efi_esrt_init(void); |
743 | #else |
744 | static inline void efi_esrt_init(void) { } |
745 | #endif |
746 | extern int efi_config_parse_tables(const efi_config_table_t *config_tables, |
747 | int count, |
748 | const efi_config_table_type_t *arch_tables); |
749 | extern int (const efi_table_hdr_t *systab_hdr); |
750 | extern void (const efi_table_hdr_t *systab_hdr, |
751 | unsigned long fw_vendor); |
752 | extern u64 efi_get_iobase (void); |
753 | extern int efi_mem_type(unsigned long phys_addr); |
754 | extern u64 efi_mem_attributes (unsigned long phys_addr); |
755 | extern u64 efi_mem_attribute (unsigned long phys_addr, unsigned long size); |
756 | extern int __init efi_uart_console_only (void); |
757 | extern u64 efi_mem_desc_end(efi_memory_desc_t *md); |
758 | extern int efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md); |
759 | extern int __efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md); |
760 | extern void efi_mem_reserve(phys_addr_t addr, u64 size); |
761 | extern int efi_mem_reserve_persistent(phys_addr_t addr, u64 size); |
762 | extern void efi_initialize_iomem_resources(struct resource *code_resource, |
763 | struct resource *data_resource, struct resource *bss_resource); |
764 | extern u64 efi_get_fdt_params(struct efi_memory_map_data *data); |
765 | extern struct kobject *efi_kobj; |
766 | |
767 | extern int efi_reboot_quirk_mode; |
768 | extern bool efi_poweroff_required(void); |
769 | |
770 | extern unsigned long efi_mem_attr_table; |
771 | |
772 | /* |
773 | * efi_memattr_perm_setter - arch specific callback function passed into |
774 | * efi_memattr_apply_permissions() that updates the |
775 | * mapping permissions described by the second |
776 | * argument in the page tables referred to by the |
777 | * first argument. |
778 | */ |
779 | typedef int (*efi_memattr_perm_setter)(struct mm_struct *, efi_memory_desc_t *, bool); |
780 | |
781 | extern int efi_memattr_init(void); |
782 | extern int efi_memattr_apply_permissions(struct mm_struct *mm, |
783 | efi_memattr_perm_setter fn); |
784 | |
785 | /* |
786 | * efi_early_memdesc_ptr - get the n-th EFI memmap descriptor |
787 | * @map: the start of efi memmap |
788 | * @desc_size: the size of space for each EFI memmap descriptor |
789 | * @n: the index of efi memmap descriptor |
790 | * |
791 | * EFI boot service provides the GetMemoryMap() function to get a copy of the |
792 | * current memory map which is an array of memory descriptors, each of |
793 | * which describes a contiguous block of memory. It also gets the size of the |
794 | * map, and the size of each descriptor, etc. |
795 | * |
796 | * Note that per section 6.2 of UEFI Spec 2.6 Errata A, the returned size of |
797 | * each descriptor might not be equal to sizeof(efi_memory_memdesc_t), |
798 | * since efi_memory_memdesc_t may be extended in the future. Thus the OS |
799 | * MUST use the returned size of the descriptor to find the start of each |
800 | * efi_memory_memdesc_t in the memory map array. This should only be used |
801 | * during bootup since for_each_efi_memory_desc_xxx() is available after the |
802 | * kernel initializes the EFI subsystem to set up struct efi_memory_map. |
803 | */ |
804 | #define efi_early_memdesc_ptr(map, desc_size, n) \ |
805 | (efi_memory_desc_t *)((void *)(map) + ((n) * (desc_size))) |
806 | |
807 | /* Iterate through an efi_memory_map */ |
808 | #define for_each_efi_memory_desc_in_map(m, md) \ |
809 | for ((md) = (m)->map; \ |
810 | (md) && ((void *)(md) + (m)->desc_size) <= (m)->map_end; \ |
811 | (md) = (void *)(md) + (m)->desc_size) |
812 | |
813 | /** |
814 | * for_each_efi_memory_desc - iterate over descriptors in efi.memmap |
815 | * @md: the efi_memory_desc_t * iterator |
816 | * |
817 | * Once the loop finishes @md must not be accessed. |
818 | */ |
819 | #define for_each_efi_memory_desc(md) \ |
820 | for_each_efi_memory_desc_in_map(&efi.memmap, md) |
821 | |
822 | /* |
823 | * Format an EFI memory descriptor's type and attributes to a user-provided |
824 | * character buffer, as per snprintf(), and return the buffer. |
825 | */ |
826 | char * __init efi_md_typeattr_format(char *buf, size_t size, |
827 | const efi_memory_desc_t *md); |
828 | |
829 | |
830 | typedef void (*efi_element_handler_t)(const char *source, |
831 | const void *element_data, |
832 | size_t element_size); |
833 | extern int __init parse_efi_signature_list( |
834 | const char *source, |
835 | const void *data, size_t size, |
836 | efi_element_handler_t (*get_handler_for_guid)(const efi_guid_t *)); |
837 | |
838 | /** |
839 | * efi_range_is_wc - check the WC bit on an address range |
840 | * @start: starting kvirt address |
841 | * @len: length of range |
842 | * |
843 | * Consult the EFI memory map and make sure it's ok to set this range WC. |
844 | * Returns true or false. |
845 | */ |
846 | static inline int efi_range_is_wc(unsigned long start, unsigned long len) |
847 | { |
848 | unsigned long i; |
849 | |
850 | for (i = 0; i < len; i += (1UL << EFI_PAGE_SHIFT)) { |
851 | unsigned long paddr = __pa(start + i); |
852 | if (!(efi_mem_attributes(phys_addr: paddr) & EFI_MEMORY_WC)) |
853 | return 0; |
854 | } |
855 | /* The range checked out */ |
856 | return 1; |
857 | } |
858 | |
859 | /* |
860 | * We play games with efi_enabled so that the compiler will, if |
861 | * possible, remove EFI-related code altogether. |
862 | */ |
863 | #define EFI_BOOT 0 /* Were we booted from EFI? */ |
864 | #define EFI_CONFIG_TABLES 2 /* Can we use EFI config tables? */ |
865 | #define EFI_RUNTIME_SERVICES 3 /* Can we use runtime services? */ |
866 | #define EFI_MEMMAP 4 /* Can we use EFI memory map? */ |
867 | #define EFI_64BIT 5 /* Is the firmware 64-bit? */ |
868 | #define EFI_PARAVIRT 6 /* Access is via a paravirt interface */ |
869 | #define EFI_ARCH_1 7 /* First arch-specific bit */ |
870 | #define EFI_DBG 8 /* Print additional debug info at runtime */ |
871 | #define EFI_NX_PE_DATA 9 /* Can runtime data regions be mapped non-executable? */ |
872 | #define EFI_MEM_ATTR 10 /* Did firmware publish an EFI_MEMORY_ATTRIBUTES table? */ |
873 | #define EFI_MEM_NO_SOFT_RESERVE 11 /* Is the kernel configured to ignore soft reservations? */ |
874 | #define EFI_PRESERVE_BS_REGIONS 12 /* Are EFI boot-services memory segments available? */ |
875 | |
876 | #ifdef CONFIG_EFI |
877 | /* |
878 | * Test whether the above EFI_* bits are enabled. |
879 | */ |
880 | static inline bool efi_enabled(int feature) |
881 | { |
882 | return test_bit(feature, &efi.flags) != 0; |
883 | } |
884 | extern void efi_reboot(enum reboot_mode reboot_mode, const char *__unused); |
885 | |
886 | bool __pure __efi_soft_reserve_enabled(void); |
887 | |
888 | static inline bool __pure efi_soft_reserve_enabled(void) |
889 | { |
890 | return IS_ENABLED(CONFIG_EFI_SOFT_RESERVE) |
891 | && __efi_soft_reserve_enabled(); |
892 | } |
893 | |
894 | static inline bool efi_rt_services_supported(unsigned int mask) |
895 | { |
896 | return (efi.runtime_supported_mask & mask) == mask; |
897 | } |
898 | extern void efi_find_mirror(void); |
899 | #else |
900 | static inline bool efi_enabled(int feature) |
901 | { |
902 | return false; |
903 | } |
904 | static inline void |
905 | efi_reboot(enum reboot_mode reboot_mode, const char *__unused) {} |
906 | |
907 | static inline bool efi_soft_reserve_enabled(void) |
908 | { |
909 | return false; |
910 | } |
911 | |
912 | static inline bool efi_rt_services_supported(unsigned int mask) |
913 | { |
914 | return false; |
915 | } |
916 | |
917 | static inline void efi_find_mirror(void) {} |
918 | #endif |
919 | |
920 | extern int efi_status_to_err(efi_status_t status); |
921 | |
922 | /* |
923 | * Variable Attributes |
924 | */ |
925 | #define EFI_VARIABLE_NON_VOLATILE 0x0000000000000001 |
926 | #define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002 |
927 | #define EFI_VARIABLE_RUNTIME_ACCESS 0x0000000000000004 |
928 | #define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008 |
929 | #define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010 |
930 | #define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020 |
931 | #define EFI_VARIABLE_APPEND_WRITE 0x0000000000000040 |
932 | |
933 | #define EFI_VARIABLE_MASK (EFI_VARIABLE_NON_VOLATILE | \ |
934 | EFI_VARIABLE_BOOTSERVICE_ACCESS | \ |
935 | EFI_VARIABLE_RUNTIME_ACCESS | \ |
936 | EFI_VARIABLE_HARDWARE_ERROR_RECORD | \ |
937 | EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \ |
938 | EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \ |
939 | EFI_VARIABLE_APPEND_WRITE) |
940 | /* |
941 | * Length of a GUID string (strlen("aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee")) |
942 | * not including trailing NUL |
943 | */ |
944 | #define EFI_VARIABLE_GUID_LEN UUID_STRING_LEN |
945 | |
946 | /* |
947 | * EFI Device Path information |
948 | */ |
949 | #define EFI_DEV_HW 0x01 |
950 | #define EFI_DEV_PCI 1 |
951 | #define EFI_DEV_PCCARD 2 |
952 | #define EFI_DEV_MEM_MAPPED 3 |
953 | #define EFI_DEV_VENDOR 4 |
954 | #define EFI_DEV_CONTROLLER 5 |
955 | #define EFI_DEV_ACPI 0x02 |
956 | #define EFI_DEV_BASIC_ACPI 1 |
957 | #define EFI_DEV_EXPANDED_ACPI 2 |
958 | #define EFI_DEV_MSG 0x03 |
959 | #define EFI_DEV_MSG_ATAPI 1 |
960 | #define EFI_DEV_MSG_SCSI 2 |
961 | #define EFI_DEV_MSG_FC 3 |
962 | #define EFI_DEV_MSG_1394 4 |
963 | #define EFI_DEV_MSG_USB 5 |
964 | #define EFI_DEV_MSG_USB_CLASS 15 |
965 | #define EFI_DEV_MSG_I20 6 |
966 | #define EFI_DEV_MSG_MAC 11 |
967 | #define EFI_DEV_MSG_IPV4 12 |
968 | #define EFI_DEV_MSG_IPV6 13 |
969 | #define EFI_DEV_MSG_INFINIBAND 9 |
970 | #define EFI_DEV_MSG_UART 14 |
971 | #define EFI_DEV_MSG_VENDOR 10 |
972 | #define EFI_DEV_MEDIA 0x04 |
973 | #define EFI_DEV_MEDIA_HARD_DRIVE 1 |
974 | #define EFI_DEV_MEDIA_CDROM 2 |
975 | #define EFI_DEV_MEDIA_VENDOR 3 |
976 | #define EFI_DEV_MEDIA_FILE 4 |
977 | #define EFI_DEV_MEDIA_PROTOCOL 5 |
978 | #define EFI_DEV_MEDIA_REL_OFFSET 8 |
979 | #define EFI_DEV_BIOS_BOOT 0x05 |
980 | #define EFI_DEV_END_PATH 0x7F |
981 | #define EFI_DEV_END_PATH2 0xFF |
982 | #define EFI_DEV_END_INSTANCE 0x01 |
983 | #define EFI_DEV_END_ENTIRE 0xFF |
984 | |
985 | struct efi_generic_dev_path { |
986 | u8 type; |
987 | u8 sub_type; |
988 | u16 length; |
989 | } __packed; |
990 | |
991 | struct efi_acpi_dev_path { |
992 | struct efi_generic_dev_path ; |
993 | u32 hid; |
994 | u32 uid; |
995 | } __packed; |
996 | |
997 | struct efi_pci_dev_path { |
998 | struct efi_generic_dev_path ; |
999 | u8 fn; |
1000 | u8 dev; |
1001 | } __packed; |
1002 | |
1003 | struct efi_vendor_dev_path { |
1004 | struct efi_generic_dev_path ; |
1005 | efi_guid_t vendorguid; |
1006 | u8 vendordata[]; |
1007 | } __packed; |
1008 | |
1009 | struct efi_rel_offset_dev_path { |
1010 | struct efi_generic_dev_path ; |
1011 | u32 reserved; |
1012 | u64 starting_offset; |
1013 | u64 ending_offset; |
1014 | } __packed; |
1015 | |
1016 | struct efi_mem_mapped_dev_path { |
1017 | struct efi_generic_dev_path ; |
1018 | u32 memory_type; |
1019 | u64 starting_addr; |
1020 | u64 ending_addr; |
1021 | } __packed; |
1022 | |
1023 | struct efi_file_path_dev_path { |
1024 | struct efi_generic_dev_path ; |
1025 | efi_char16_t filename[]; |
1026 | } __packed; |
1027 | |
1028 | struct efi_dev_path { |
1029 | union { |
1030 | struct efi_generic_dev_path ; |
1031 | struct efi_acpi_dev_path acpi; |
1032 | struct efi_pci_dev_path pci; |
1033 | struct efi_vendor_dev_path vendor; |
1034 | struct efi_rel_offset_dev_path rel_offset; |
1035 | }; |
1036 | } __packed; |
1037 | |
1038 | struct device *efi_get_device_by_path(const struct efi_dev_path **node, |
1039 | size_t *len); |
1040 | |
1041 | static inline void memrange_efi_to_native(u64 *addr, u64 *npages) |
1042 | { |
1043 | *npages = PFN_UP(*addr + (*npages<<EFI_PAGE_SHIFT)) - PFN_DOWN(*addr); |
1044 | *addr &= PAGE_MASK; |
1045 | } |
1046 | |
1047 | /* |
1048 | * EFI Variable support. |
1049 | * |
1050 | * Different firmware drivers can expose their EFI-like variables using |
1051 | * the following. |
1052 | */ |
1053 | |
1054 | struct efivar_operations { |
1055 | efi_get_variable_t *get_variable; |
1056 | efi_get_next_variable_t *get_next_variable; |
1057 | efi_set_variable_t *set_variable; |
1058 | efi_set_variable_t *set_variable_nonblocking; |
1059 | efi_query_variable_store_t *query_variable_store; |
1060 | efi_query_variable_info_t *query_variable_info; |
1061 | }; |
1062 | |
1063 | struct efivars { |
1064 | struct kset *kset; |
1065 | const struct efivar_operations *ops; |
1066 | }; |
1067 | |
1068 | #ifdef CONFIG_X86 |
1069 | u64 __attribute_const__ efivar_reserved_space(void); |
1070 | #else |
1071 | static inline u64 efivar_reserved_space(void) { return 0; } |
1072 | #endif |
1073 | |
1074 | /* |
1075 | * The maximum size of VariableName + Data = 1024 |
1076 | * Therefore, it's reasonable to save that much |
1077 | * space in each part of the structure, |
1078 | * and we use a page for reading/writing. |
1079 | */ |
1080 | |
1081 | #define EFI_VAR_NAME_LEN 1024 |
1082 | |
1083 | int efivars_register(struct efivars *efivars, |
1084 | const struct efivar_operations *ops); |
1085 | int efivars_unregister(struct efivars *efivars); |
1086 | |
1087 | #ifdef CONFIG_EFI |
1088 | bool efivar_is_available(void); |
1089 | #else |
1090 | static inline bool efivar_is_available(void) { return false; } |
1091 | #endif |
1092 | |
1093 | bool efivar_supports_writes(void); |
1094 | |
1095 | int efivar_lock(void); |
1096 | int efivar_trylock(void); |
1097 | void efivar_unlock(void); |
1098 | |
1099 | efi_status_t efivar_get_variable(efi_char16_t *name, efi_guid_t *vendor, |
1100 | u32 *attr, unsigned long *size, void *data); |
1101 | |
1102 | efi_status_t efivar_get_next_variable(unsigned long *name_size, |
1103 | efi_char16_t *name, efi_guid_t *vendor); |
1104 | |
1105 | efi_status_t efivar_set_variable_locked(efi_char16_t *name, efi_guid_t *vendor, |
1106 | u32 attr, unsigned long data_size, |
1107 | void *data, bool nonblocking); |
1108 | |
1109 | efi_status_t efivar_set_variable(efi_char16_t *name, efi_guid_t *vendor, |
1110 | u32 attr, unsigned long data_size, void *data); |
1111 | |
1112 | efi_status_t efivar_query_variable_info(u32 attr, u64 *storage_space, |
1113 | u64 *remaining_space, |
1114 | u64 *max_variable_size); |
1115 | |
1116 | #if IS_ENABLED(CONFIG_EFI_CAPSULE_LOADER) |
1117 | extern bool efi_capsule_pending(int *reset_type); |
1118 | |
1119 | extern int efi_capsule_supported(efi_guid_t guid, u32 flags, |
1120 | size_t size, int *reset); |
1121 | |
1122 | extern int efi_capsule_update(efi_capsule_header_t *capsule, |
1123 | phys_addr_t *pages); |
1124 | #else |
1125 | static inline bool efi_capsule_pending(int *reset_type) { return false; } |
1126 | #endif |
1127 | |
1128 | #ifdef CONFIG_EFI |
1129 | extern bool efi_runtime_disabled(void); |
1130 | #else |
1131 | static inline bool efi_runtime_disabled(void) { return true; } |
1132 | #endif |
1133 | |
1134 | extern void efi_call_virt_check_flags(unsigned long flags, const void *caller); |
1135 | extern unsigned long efi_call_virt_save_flags(void); |
1136 | |
1137 | enum efi_secureboot_mode { |
1138 | efi_secureboot_mode_unset, |
1139 | efi_secureboot_mode_unknown, |
1140 | efi_secureboot_mode_disabled, |
1141 | efi_secureboot_mode_enabled, |
1142 | }; |
1143 | |
1144 | static inline |
1145 | enum efi_secureboot_mode efi_get_secureboot_mode(efi_get_variable_t *get_var) |
1146 | { |
1147 | u8 secboot, setupmode = 0; |
1148 | efi_status_t status; |
1149 | unsigned long size; |
1150 | |
1151 | size = sizeof(secboot); |
1152 | status = get_var(L"SecureBoot" , &EFI_GLOBAL_VARIABLE_GUID, NULL, &size, |
1153 | &secboot); |
1154 | if (status == EFI_NOT_FOUND) |
1155 | return efi_secureboot_mode_disabled; |
1156 | if (status != EFI_SUCCESS) |
1157 | return efi_secureboot_mode_unknown; |
1158 | |
1159 | size = sizeof(setupmode); |
1160 | get_var(L"SetupMode" , &EFI_GLOBAL_VARIABLE_GUID, NULL, &size, &setupmode); |
1161 | if (secboot == 0 || setupmode == 1) |
1162 | return efi_secureboot_mode_disabled; |
1163 | return efi_secureboot_mode_enabled; |
1164 | } |
1165 | |
1166 | #ifdef CONFIG_EFI_EMBEDDED_FIRMWARE |
1167 | void efi_check_for_embedded_firmwares(void); |
1168 | #else |
1169 | static inline void efi_check_for_embedded_firmwares(void) { } |
1170 | #endif |
1171 | |
1172 | #define arch_efi_call_virt(p, f, args...) ((p)->f(args)) |
1173 | |
1174 | /* |
1175 | * Arch code must implement the following three routines: |
1176 | * |
1177 | * * arch_efi_call_virt_setup() |
1178 | * |
1179 | * Sets up the environment for the call (e.g. switching page tables, |
1180 | * allowing kernel-mode use of floating point, if required). |
1181 | * |
1182 | * * arch_efi_call_virt() |
1183 | * |
1184 | * Performs the call. This routine takes a variable number of arguments so |
1185 | * it must be implemented as a variadic preprocessor macro. |
1186 | * |
1187 | * * arch_efi_call_virt_teardown() |
1188 | * |
1189 | * Restores the usual kernel environment once the call has returned. |
1190 | */ |
1191 | |
1192 | #define efi_call_virt_pointer(p, f, args...) \ |
1193 | ({ \ |
1194 | typeof((p)->f(args)) __s; \ |
1195 | unsigned long __flags; \ |
1196 | \ |
1197 | arch_efi_call_virt_setup(); \ |
1198 | \ |
1199 | __flags = efi_call_virt_save_flags(); \ |
1200 | __s = arch_efi_call_virt(p, f, args); \ |
1201 | efi_call_virt_check_flags(__flags, NULL); \ |
1202 | \ |
1203 | arch_efi_call_virt_teardown(); \ |
1204 | \ |
1205 | __s; \ |
1206 | }) |
1207 | |
1208 | #define EFI_RANDOM_SEED_SIZE 32U // BLAKE2S_HASH_SIZE |
1209 | |
1210 | struct linux_efi_random_seed { |
1211 | u32 size; |
1212 | u8 bits[]; |
1213 | }; |
1214 | |
1215 | struct linux_efi_tpm_eventlog { |
1216 | u32 size; |
1217 | u32 final_events_preboot_size; |
1218 | u8 version; |
1219 | u8 log[]; |
1220 | }; |
1221 | |
1222 | extern int efi_tpm_eventlog_init(void); |
1223 | |
1224 | struct efi_tcg2_final_events_table { |
1225 | u64 version; |
1226 | u64 nr_events; |
1227 | u8 events[]; |
1228 | }; |
1229 | extern int efi_tpm_final_log_size; |
1230 | |
1231 | extern unsigned long rci2_table_phys; |
1232 | |
1233 | efi_status_t |
1234 | efi_call_acpi_prm_handler(efi_status_t (__efiapi *handler_addr)(u64, void *), |
1235 | u64 param_buffer_addr, void *context); |
1236 | |
1237 | /* |
1238 | * efi_runtime_service() function identifiers. |
1239 | * "NONE" is used by efi_recover_from_page_fault() to check if the page |
1240 | * fault happened while executing an efi runtime service. |
1241 | */ |
1242 | enum efi_rts_ids { |
1243 | EFI_NONE, |
1244 | EFI_GET_TIME, |
1245 | EFI_SET_TIME, |
1246 | EFI_GET_WAKEUP_TIME, |
1247 | EFI_SET_WAKEUP_TIME, |
1248 | EFI_GET_VARIABLE, |
1249 | EFI_GET_NEXT_VARIABLE, |
1250 | EFI_SET_VARIABLE, |
1251 | EFI_QUERY_VARIABLE_INFO, |
1252 | EFI_GET_NEXT_HIGH_MONO_COUNT, |
1253 | EFI_RESET_SYSTEM, |
1254 | EFI_UPDATE_CAPSULE, |
1255 | EFI_QUERY_CAPSULE_CAPS, |
1256 | EFI_ACPI_PRM_HANDLER, |
1257 | }; |
1258 | |
1259 | union efi_rts_args; |
1260 | |
1261 | /* |
1262 | * efi_runtime_work: Details of EFI Runtime Service work |
1263 | * @args: Pointer to union describing the arguments |
1264 | * @status: Status of executing EFI Runtime Service |
1265 | * @efi_rts_id: EFI Runtime Service function identifier |
1266 | * @efi_rts_comp: Struct used for handling completions |
1267 | * @caller: The caller of the runtime service |
1268 | */ |
1269 | struct efi_runtime_work { |
1270 | union efi_rts_args *args; |
1271 | efi_status_t status; |
1272 | struct work_struct work; |
1273 | enum efi_rts_ids efi_rts_id; |
1274 | struct completion efi_rts_comp; |
1275 | const void *caller; |
1276 | }; |
1277 | |
1278 | extern struct efi_runtime_work efi_rts_work; |
1279 | |
1280 | /* Workqueue to queue EFI Runtime Services */ |
1281 | extern struct workqueue_struct *efi_rts_wq; |
1282 | |
1283 | struct linux_efi_memreserve { |
1284 | int size; // allocated size of the array |
1285 | atomic_t count; // number of entries used |
1286 | phys_addr_t next; // pa of next struct instance |
1287 | struct { |
1288 | phys_addr_t base; |
1289 | phys_addr_t size; |
1290 | } entry[]; |
1291 | }; |
1292 | |
1293 | #define EFI_MEMRESERVE_COUNT(size) (((size) - sizeof(struct linux_efi_memreserve)) \ |
1294 | / sizeof_field(struct linux_efi_memreserve, entry[0])) |
1295 | |
1296 | void __init efi_arch_mem_reserve(phys_addr_t addr, u64 size); |
1297 | |
1298 | char *efi_systab_show_arch(char *str); |
1299 | |
1300 | /* |
1301 | * The LINUX_EFI_MOK_VARIABLE_TABLE_GUID config table can be provided |
1302 | * to the kernel by an EFI boot loader. The table contains a packed |
1303 | * sequence of these entries, one for each named MOK variable. |
1304 | * The sequence is terminated by an entry with a completely NULL |
1305 | * name and 0 data size. |
1306 | */ |
1307 | struct efi_mokvar_table_entry { |
1308 | char name[256]; |
1309 | u64 data_size; |
1310 | u8 data[]; |
1311 | } __attribute((packed)); |
1312 | |
1313 | #ifdef CONFIG_LOAD_UEFI_KEYS |
1314 | extern void __init efi_mokvar_table_init(void); |
1315 | extern struct efi_mokvar_table_entry *efi_mokvar_entry_next( |
1316 | struct efi_mokvar_table_entry **mokvar_entry); |
1317 | extern struct efi_mokvar_table_entry *efi_mokvar_entry_find(const char *name); |
1318 | #else |
1319 | static inline void efi_mokvar_table_init(void) { } |
1320 | static inline struct efi_mokvar_table_entry *efi_mokvar_entry_next( |
1321 | struct efi_mokvar_table_entry **mokvar_entry) |
1322 | { |
1323 | return NULL; |
1324 | } |
1325 | static inline struct efi_mokvar_table_entry *efi_mokvar_entry_find( |
1326 | const char *name) |
1327 | { |
1328 | return NULL; |
1329 | } |
1330 | #endif |
1331 | |
1332 | extern void efifb_setup_from_dmi(struct screen_info *si, const char *opt); |
1333 | |
1334 | struct linux_efi_coco_secret_area { |
1335 | u64 base_pa; |
1336 | u64 size; |
1337 | }; |
1338 | |
1339 | struct linux_efi_initrd { |
1340 | unsigned long base; |
1341 | unsigned long size; |
1342 | }; |
1343 | |
1344 | /* Header of a populated EFI secret area */ |
1345 | #define EFI_GUID(0x1e74f542, 0x71dd, 0x4d66, 0x96, 0x3e, 0xef, 0x42, 0x87, 0xff, 0x17, 0x3b) |
1346 | |
1347 | bool xen_efi_config_table_is_usable(const efi_guid_t *guid, unsigned long table); |
1348 | |
1349 | static inline |
1350 | bool efi_config_table_is_usable(const efi_guid_t *guid, unsigned long table) |
1351 | { |
1352 | if (!IS_ENABLED(CONFIG_XEN_EFI)) |
1353 | return true; |
1354 | return xen_efi_config_table_is_usable(guid, table); |
1355 | } |
1356 | |
1357 | umode_t efi_attr_is_visible(struct kobject *kobj, struct attribute *attr, int n); |
1358 | |
1359 | /* |
1360 | * efivar ops event type |
1361 | */ |
1362 | #define EFIVAR_OPS_RDONLY 0 |
1363 | #define EFIVAR_OPS_RDWR 1 |
1364 | |
1365 | extern struct blocking_notifier_head efivar_ops_nh; |
1366 | |
1367 | void efivars_generic_ops_register(void); |
1368 | void efivars_generic_ops_unregister(void); |
1369 | |
1370 | #endif /* _LINUX_EFI_H */ |
1371 | |