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 headersize;
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 BIT_ULL(0) /* uncached */
118 #define EFI_MEMORY_WC BIT_ULL(1) /* write-coalescing */
119 #define EFI_MEMORY_WT BIT_ULL(2) /* write-through */
120 #define EFI_MEMORY_WB BIT_ULL(3) /* write-back */
121 #define EFI_MEMORY_UCE BIT_ULL(4) /* uncached, exported */
122 #define EFI_MEMORY_WP BIT_ULL(12) /* write-protect */
123 #define EFI_MEMORY_RP BIT_ULL(13) /* read-protect */
124 #define EFI_MEMORY_XP BIT_ULL(14) /* execute-protect */
125 #define EFI_MEMORY_NV BIT_ULL(15) /* non-volatile */
126 #define EFI_MEMORY_MORE_RELIABLE BIT_ULL(16) /* higher reliability */
127 #define EFI_MEMORY_RO BIT_ULL(17) /* read-only */
128 #define EFI_MEMORY_SP BIT_ULL(18) /* soft reserved */
129 #define EFI_MEMORY_CPU_CRYPTO BIT_ULL(19) /* supports encryption */
130 #define EFI_MEMORY_HOT_PLUGGABLE BIT_ULL(20) /* supports unplugging at runtime */
131 #define EFI_MEMORY_RUNTIME BIT_ULL(63) /* range requires runtime mapping */
132
133 #define EFI_MEMORY_DESCRIPTOR_VERSION 1
134
135 #define EFI_PAGE_SHIFT 12
136 #define EFI_PAGE_SIZE (1UL << EFI_PAGE_SHIFT)
137 #define EFI_PAGES_MAX (U64_MAX >> EFI_PAGE_SHIFT)
138
139 typedef struct {
140 u32 type;
141 u32 pad;
142 u64 phys_addr;
143 u64 virt_addr;
144 u64 num_pages;
145 u64 attribute;
146 } efi_memory_desc_t;
147
148 typedef struct {
149 efi_guid_t guid;
150 u32 headersize;
151 u32 flags;
152 u32 imagesize;
153 } efi_capsule_header_t;
154
155 /* EFI_FIRMWARE_MANAGEMENT_CAPSULE_HEADER */
156 struct efi_manage_capsule_header {
157 u32 ver;
158 u16 emb_drv_cnt;
159 u16 payload_cnt;
160 /*
161 * Variable-size array of the size given by the sum of
162 * emb_drv_cnt and payload_cnt.
163 */
164 u64 offset_list[];
165 } __packed;
166
167 /* EFI_FIRMWARE_MANAGEMENT_CAPSULE_IMAGE_HEADER */
168 struct efi_manage_capsule_image_header {
169 u32 ver;
170 efi_guid_t image_type_id;
171 u8 image_index;
172 u8 reserved_bytes[3];
173 u32 image_size;
174 u32 vendor_code_size;
175 /* hw_ins was introduced in version 2 */
176 u64 hw_ins;
177 /* capsule_support was introduced in version 3 */
178 u64 capsule_support;
179 } __packed;
180
181 /* WIN_CERTIFICATE */
182 struct win_cert {
183 u32 len;
184 u16 rev;
185 u16 cert_type;
186 };
187
188 /* WIN_CERTIFICATE_UEFI_GUID */
189 struct win_cert_uefi_guid {
190 struct win_cert hdr;
191 efi_guid_t cert_type;
192 u8 cert_data[];
193 };
194
195 /* EFI_FIRMWARE_IMAGE_AUTHENTICATION */
196 struct efi_image_auth {
197 u64 mon_count;
198 struct win_cert_uefi_guid auth_info;
199 };
200
201 /*
202 * EFI capsule flags
203 */
204 #define EFI_CAPSULE_PERSIST_ACROSS_RESET 0x00010000
205 #define EFI_CAPSULE_POPULATE_SYSTEM_TABLE 0x00020000
206 #define EFI_CAPSULE_INITIATE_RESET 0x00040000
207
208 struct capsule_info {
209 efi_capsule_header_t header;
210 efi_capsule_header_t *capsule;
211 int reset_type;
212 long index;
213 size_t count;
214 size_t total_size;
215 struct page **pages;
216 phys_addr_t *phys;
217 size_t page_bytes_remain;
218 };
219
220 int efi_capsule_setup_info(struct capsule_info *cap_info, void *kbuff,
221 size_t hdr_bytes);
222 int __efi_capsule_setup_info(struct capsule_info *cap_info);
223
224 /*
225 * Types and defines for Time Services
226 */
227 #define EFI_TIME_ADJUST_DAYLIGHT 0x1
228 #define EFI_TIME_IN_DAYLIGHT 0x2
229 #define EFI_UNSPECIFIED_TIMEZONE 0x07ff
230
231 typedef struct {
232 u16 year;
233 u8 month;
234 u8 day;
235 u8 hour;
236 u8 minute;
237 u8 second;
238 u8 pad1;
239 u32 nanosecond;
240 s16 timezone;
241 u8 daylight;
242 u8 pad2;
243 } efi_time_t;
244
245 typedef struct {
246 u32 resolution;
247 u32 accuracy;
248 u8 sets_to_zero;
249 } efi_time_cap_t;
250
251 typedef union efi_boot_services efi_boot_services_t;
252
253 /*
254 * Types and defines for EFI ResetSystem
255 */
256 #define EFI_RESET_COLD 0
257 #define EFI_RESET_WARM 1
258 #define EFI_RESET_SHUTDOWN 2
259
260 /*
261 * EFI Runtime Services table
262 */
263 #define EFI_RUNTIME_SERVICES_SIGNATURE ((u64)0x5652453544e5552ULL)
264 #define EFI_RUNTIME_SERVICES_REVISION 0x00010000
265
266 typedef struct {
267 efi_table_hdr_t hdr;
268 u32 get_time;
269 u32 set_time;
270 u32 get_wakeup_time;
271 u32 set_wakeup_time;
272 u32 set_virtual_address_map;
273 u32 convert_pointer;
274 u32 get_variable;
275 u32 get_next_variable;
276 u32 set_variable;
277 u32 get_next_high_mono_count;
278 u32 reset_system;
279 u32 update_capsule;
280 u32 query_capsule_caps;
281 u32 query_variable_info;
282 } efi_runtime_services_32_t;
283
284 typedef efi_status_t efi_get_time_t (efi_time_t *tm, efi_time_cap_t *tc);
285 typedef efi_status_t efi_set_time_t (efi_time_t *tm);
286 typedef efi_status_t efi_get_wakeup_time_t (efi_bool_t *enabled, efi_bool_t *pending,
287 efi_time_t *tm);
288 typedef efi_status_t efi_set_wakeup_time_t (efi_bool_t enabled, efi_time_t *tm);
289 typedef efi_status_t efi_get_variable_t (efi_char16_t *name, efi_guid_t *vendor, u32 *attr,
290 unsigned long *data_size, void *data);
291 typedef efi_status_t efi_get_next_variable_t (unsigned long *name_size, efi_char16_t *name,
292 efi_guid_t *vendor);
293 typedef efi_status_t efi_set_variable_t (efi_char16_t *name, efi_guid_t *vendor,
294 u32 attr, unsigned long data_size,
295 void *data);
296 typedef efi_status_t efi_get_next_high_mono_count_t (u32 *count);
297 typedef void efi_reset_system_t (int reset_type, efi_status_t status,
298 unsigned long data_size, efi_char16_t *data);
299 typedef efi_status_t efi_set_virtual_address_map_t (unsigned long memory_map_size,
300 unsigned long descriptor_size,
301 u32 descriptor_version,
302 efi_memory_desc_t *virtual_map);
303 typedef efi_status_t efi_query_variable_info_t(u32 attr,
304 u64 *storage_space,
305 u64 *remaining_space,
306 u64 *max_variable_size);
307 typedef efi_status_t efi_update_capsule_t(efi_capsule_header_t **capsules,
308 unsigned long count,
309 unsigned long sg_list);
310 typedef efi_status_t efi_query_capsule_caps_t(efi_capsule_header_t **capsules,
311 unsigned long count,
312 u64 *max_size,
313 int *reset_type);
314 typedef efi_status_t efi_query_variable_store_t(u32 attributes,
315 unsigned long size,
316 bool nonblocking);
317
318 typedef union {
319 struct {
320 efi_table_hdr_t hdr;
321 efi_get_time_t __efiapi *get_time;
322 efi_set_time_t __efiapi *set_time;
323 efi_get_wakeup_time_t __efiapi *get_wakeup_time;
324 efi_set_wakeup_time_t __efiapi *set_wakeup_time;
325 efi_set_virtual_address_map_t __efiapi *set_virtual_address_map;
326 void *convert_pointer;
327 efi_get_variable_t __efiapi *get_variable;
328 efi_get_next_variable_t __efiapi *get_next_variable;
329 efi_set_variable_t __efiapi *set_variable;
330 efi_get_next_high_mono_count_t __efiapi *get_next_high_mono_count;
331 efi_reset_system_t __efiapi *reset_system;
332 efi_update_capsule_t __efiapi *update_capsule;
333 efi_query_capsule_caps_t __efiapi *query_capsule_caps;
334 efi_query_variable_info_t __efiapi *query_variable_info;
335 };
336 efi_runtime_services_32_t mixed_mode;
337 } efi_runtime_services_t;
338
339 void efi_native_runtime_setup(void);
340
341 /*
342 * EFI Configuration Table and GUID definitions
343 *
344 * These are all defined in a single line to make them easier to
345 * grep for and to see them at a glance - while still having a
346 * similar structure to the definitions in the spec.
347 *
348 * Here's how they are structured:
349 *
350 * GUID: 12345678-1234-1234-1234-123456789012
351 * Spec:
352 * #define EFI_SOME_PROTOCOL_GUID \
353 * {0x12345678,0x1234,0x1234,\
354 * {0x12,0x34,0x12,0x34,0x56,0x78,0x90,0x12}}
355 * Here:
356 * #define SOME_PROTOCOL_GUID EFI_GUID(0x12345678, 0x1234, 0x1234, 0x12, 0x34, 0x12, 0x34, 0x56, 0x78, 0x90, 0x12)
357 * ^ tabs ^extra space
358 *
359 * Note that the 'extra space' separates the values at the same place
360 * where the UEFI SPEC breaks the line.
361 */
362 #define NULL_GUID EFI_GUID(0x00000000, 0x0000, 0x0000, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00)
363 #define ACPI_TABLE_GUID EFI_GUID(0xeb9d2d30, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
364 #define ACPI_20_TABLE_GUID EFI_GUID(0x8868e871, 0xe4f1, 0x11d3, 0xbc, 0x22, 0x00, 0x80, 0xc7, 0x3c, 0x88, 0x81)
365 #define SMBIOS_TABLE_GUID EFI_GUID(0xeb9d2d31, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
366 #define SMBIOS3_TABLE_GUID EFI_GUID(0xf2fd1544, 0x9794, 0x4a2c, 0x99, 0x2e, 0xe5, 0xbb, 0xcf, 0x20, 0xe3, 0x94)
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_PCI_IO_PROTOCOL_GUID EFI_GUID(0x4cf5b200, 0x68b8, 0x4ca5, 0x9e, 0xec, 0xb2, 0x3e, 0x3f, 0x50, 0x02, 0x9a)
377 #define EFI_FILE_INFO_ID EFI_GUID(0x09576e92, 0x6d3f, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
378 #define EFI_SYSTEM_RESOURCE_TABLE_GUID EFI_GUID(0xb122a263, 0x3661, 0x4f68, 0x99, 0x29, 0x78, 0xf8, 0xb0, 0xd6, 0x21, 0x80)
379 #define EFI_FILE_SYSTEM_GUID EFI_GUID(0x964e5b22, 0x6459, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
380 #define DEVICE_TREE_GUID EFI_GUID(0xb1b621d5, 0xf19c, 0x41a5, 0x83, 0x0b, 0xd9, 0x15, 0x2c, 0x69, 0xaa, 0xe0)
381 #define EFI_RNG_PROTOCOL_GUID EFI_GUID(0x3152bca5, 0xeade, 0x433d, 0x86, 0x2e, 0xc0, 0x1c, 0xdc, 0x29, 0x1f, 0x44)
382 #define EFI_RNG_ALGORITHM_RAW EFI_GUID(0xe43176d7, 0xb6e8, 0x4827, 0xb7, 0x84, 0x7f, 0xfd, 0xc4, 0xb6, 0x85, 0x61)
383 #define EFI_MEMORY_ATTRIBUTES_TABLE_GUID EFI_GUID(0xdcfa911d, 0x26eb, 0x469f, 0xa2, 0x20, 0x38, 0xb7, 0xdc, 0x46, 0x12, 0x20)
384 #define EFI_CONSOLE_OUT_DEVICE_GUID EFI_GUID(0xd3b36f2c, 0xd551, 0x11d4, 0x9a, 0x46, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
385 #define APPLE_PROPERTIES_PROTOCOL_GUID EFI_GUID(0x91bd12fe, 0xf6c3, 0x44fb, 0xa5, 0xb7, 0x51, 0x22, 0xab, 0x30, 0x3a, 0xe0)
386 #define APPLE_SET_OS_PROTOCOL_GUID EFI_GUID(0xc5c5da95, 0x7d5c, 0x45e6, 0xb2, 0xf1, 0x3f, 0xd5, 0x2b, 0xb1, 0x00, 0x77)
387 #define EFI_TCG2_PROTOCOL_GUID EFI_GUID(0x607f766c, 0x7455, 0x42be, 0x93, 0x0b, 0xe4, 0xd7, 0x6d, 0xb2, 0x72, 0x0f)
388 #define EFI_TCG2_FINAL_EVENTS_TABLE_GUID EFI_GUID(0x1e2ed096, 0x30e2, 0x4254, 0xbd, 0x89, 0x86, 0x3b, 0xbe, 0xf8, 0x23, 0x25)
389 #define EFI_LOAD_FILE_PROTOCOL_GUID EFI_GUID(0x56ec3091, 0x954c, 0x11d2, 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
390 #define EFI_LOAD_FILE2_PROTOCOL_GUID EFI_GUID(0x4006c0c1, 0xfcb3, 0x403e, 0x99, 0x6d, 0x4a, 0x6c, 0x87, 0x24, 0xe0, 0x6d)
391 #define EFI_RT_PROPERTIES_TABLE_GUID EFI_GUID(0xeb66918a, 0x7eef, 0x402a, 0x84, 0x2e, 0x93, 0x1d, 0x21, 0xc3, 0x8a, 0xe9)
392 #define EFI_DXE_SERVICES_TABLE_GUID EFI_GUID(0x05ad34ba, 0x6f02, 0x4214, 0x95, 0x2e, 0x4d, 0xa0, 0x39, 0x8e, 0x2b, 0xb9)
393 #define EFI_SMBIOS_PROTOCOL_GUID EFI_GUID(0x03583ff6, 0xcb36, 0x4940, 0x94, 0x7e, 0xb9, 0xb3, 0x9f, 0x4a, 0xfa, 0xf7)
394 #define EFI_MEMORY_ATTRIBUTE_PROTOCOL_GUID EFI_GUID(0xf4560cf6, 0x40ec, 0x4b4a, 0xa1, 0x92, 0xbf, 0x1d, 0x57, 0xd0, 0xb1, 0x89)
395
396 #define EFI_IMAGE_SECURITY_DATABASE_GUID EFI_GUID(0xd719b2cb, 0x3d3a, 0x4596, 0xa3, 0xbc, 0xda, 0xd0, 0x0e, 0x67, 0x65, 0x6f)
397 #define EFI_SHIM_LOCK_GUID EFI_GUID(0x605dab50, 0xe046, 0x4300, 0xab, 0xb6, 0x3d, 0xd8, 0x10, 0xdd, 0x8b, 0x23)
398
399 #define EFI_CERT_SHA256_GUID EFI_GUID(0xc1c41626, 0x504c, 0x4092, 0xac, 0xa9, 0x41, 0xf9, 0x36, 0x93, 0x43, 0x28)
400 #define EFI_CERT_X509_GUID EFI_GUID(0xa5c059a1, 0x94e4, 0x4aa7, 0x87, 0xb5, 0xab, 0x15, 0x5c, 0x2b, 0xf0, 0x72)
401 #define EFI_CERT_X509_SHA256_GUID EFI_GUID(0x3bd2a492, 0x96c0, 0x4079, 0xb4, 0x20, 0xfc, 0xf9, 0x8e, 0xf1, 0x03, 0xed)
402 #define EFI_CC_BLOB_GUID EFI_GUID(0x067b1f5f, 0xcf26, 0x44c5, 0x85, 0x54, 0x93, 0xd7, 0x77, 0x91, 0x2d, 0x42)
403 #define EFI_CC_MEASUREMENT_PROTOCOL_GUID EFI_GUID(0x96751a3d, 0x72f4, 0x41a6, 0xa7, 0x94, 0xed, 0x5d, 0x0e, 0x67, 0xae, 0x6b)
404 #define EFI_CC_FINAL_EVENTS_TABLE_GUID EFI_GUID(0xdd4a4648, 0x2de7, 0x4665, 0x96, 0x4d, 0x21, 0xd9, 0xef, 0x5f, 0xb4, 0x46)
405
406 /*
407 * This GUID is used to pass to the kernel proper the struct screen_info
408 * structure that was populated by the stub based on the GOP protocol instance
409 * associated with ConOut
410 */
411 #define LINUX_EFI_SCREEN_INFO_TABLE_GUID EFI_GUID(0xe03fc20a, 0x85dc, 0x406e, 0xb9, 0x0e, 0x4a, 0xb5, 0x02, 0x37, 0x1d, 0x95)
412 #define LINUX_EFI_ARM_CPU_STATE_TABLE_GUID EFI_GUID(0xef79e4aa, 0x3c3d, 0x4989, 0xb9, 0x02, 0x07, 0xa9, 0x43, 0xe5, 0x50, 0xd2)
413 #define LINUX_EFI_LOADER_ENTRY_GUID EFI_GUID(0x4a67b082, 0x0a4c, 0x41cf, 0xb6, 0xc7, 0x44, 0x0b, 0x29, 0xbb, 0x8c, 0x4f)
414 #define LINUX_EFI_RANDOM_SEED_TABLE_GUID EFI_GUID(0x1ce1e5bc, 0x7ceb, 0x42f2, 0x81, 0xe5, 0x8a, 0xad, 0xf1, 0x80, 0xf5, 0x7b)
415 #define LINUX_EFI_TPM_EVENT_LOG_GUID EFI_GUID(0xb7799cb0, 0xeca2, 0x4943, 0x96, 0x67, 0x1f, 0xae, 0x07, 0xb7, 0x47, 0xfa)
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 u16 version;
583 u16 length;
584 u32 runtime_services_supported;
585 } efi_rt_properties_table_t;
586
587 #define EFI_RT_PROPERTIES_TABLE_VERSION 0x1
588
589 #define EFI_INVALID_TABLE_ADDR (~0UL)
590
591 // BIT0 implies that Runtime code includes the forward control flow guard
592 // instruction, such as X86 CET-IBT or ARM BTI.
593 #define EFI_MEMORY_ATTRIBUTES_FLAGS_RT_FORWARD_CONTROL_FLOW_GUARD 0x1
594
595 typedef struct {
596 u32 version;
597 u32 num_entries;
598 u32 desc_size;
599 u32 flags;
600 /*
601 * There are @num_entries following, each of size @desc_size bytes,
602 * including an efi_memory_desc_t header. See efi_memdesc_ptr().
603 */
604 efi_memory_desc_t entry[];
605 } efi_memory_attributes_table_t;
606
607 typedef struct {
608 efi_guid_t signature_owner;
609 u8 signature_data[];
610 } efi_signature_data_t;
611
612 typedef struct {
613 efi_guid_t signature_type;
614 u32 signature_list_size;
615 u32 signature_header_size;
616 u32 signature_size;
617 u8 signature_header[];
618 /* efi_signature_data_t signatures[][] */
619 } efi_signature_list_t;
620
621 typedef u8 efi_sha256_hash_t[32];
622
623 typedef struct {
624 efi_sha256_hash_t to_be_signed_hash;
625 efi_time_t time_of_revocation;
626 } efi_cert_x509_sha256_t;
627
628 extern unsigned long __ro_after_init efi_rng_seed; /* RNG Seed table */
629
630 /*
631 * All runtime access to EFI goes through this structure:
632 */
633 extern struct efi {
634 const efi_runtime_services_t *runtime; /* EFI runtime services table */
635 unsigned int runtime_version; /* Runtime services version */
636 unsigned int runtime_supported_mask;
637
638 unsigned long acpi; /* ACPI table (IA64 ext 0.71) */
639 unsigned long acpi20; /* ACPI table (ACPI 2.0) */
640 unsigned long smbios; /* SMBIOS table (32 bit entry point) */
641 unsigned long smbios3; /* SMBIOS table (64 bit entry point) */
642 unsigned long esrt; /* ESRT table */
643 unsigned long tpm_log; /* TPM2 Event Log table */
644 unsigned long tpm_final_log; /* TPM2 Final Events Log table */
645 unsigned long mokvar_table; /* MOK variable config table */
646 unsigned long coco_secret; /* Confidential computing secret table */
647 unsigned long unaccepted; /* Unaccepted memory table */
648
649 efi_get_time_t *get_time;
650 efi_set_time_t *set_time;
651 efi_get_wakeup_time_t *get_wakeup_time;
652 efi_set_wakeup_time_t *set_wakeup_time;
653 efi_get_variable_t *get_variable;
654 efi_get_next_variable_t *get_next_variable;
655 efi_set_variable_t *set_variable;
656 efi_set_variable_t *set_variable_nonblocking;
657 efi_query_variable_info_t *query_variable_info;
658 efi_query_variable_info_t *query_variable_info_nonblocking;
659 efi_update_capsule_t *update_capsule;
660 efi_query_capsule_caps_t *query_capsule_caps;
661 efi_get_next_high_mono_count_t *get_next_high_mono_count;
662 efi_reset_system_t *reset_system;
663
664 struct efi_memory_map memmap;
665 unsigned long flags;
666 } efi;
667
668 #define EFI_RT_SUPPORTED_GET_TIME 0x0001
669 #define EFI_RT_SUPPORTED_SET_TIME 0x0002
670 #define EFI_RT_SUPPORTED_GET_WAKEUP_TIME 0x0004
671 #define EFI_RT_SUPPORTED_SET_WAKEUP_TIME 0x0008
672 #define EFI_RT_SUPPORTED_GET_VARIABLE 0x0010
673 #define EFI_RT_SUPPORTED_GET_NEXT_VARIABLE_NAME 0x0020
674 #define EFI_RT_SUPPORTED_SET_VARIABLE 0x0040
675 #define EFI_RT_SUPPORTED_SET_VIRTUAL_ADDRESS_MAP 0x0080
676 #define EFI_RT_SUPPORTED_CONVERT_POINTER 0x0100
677 #define EFI_RT_SUPPORTED_GET_NEXT_HIGH_MONOTONIC_COUNT 0x0200
678 #define EFI_RT_SUPPORTED_RESET_SYSTEM 0x0400
679 #define EFI_RT_SUPPORTED_UPDATE_CAPSULE 0x0800
680 #define EFI_RT_SUPPORTED_QUERY_CAPSULE_CAPABILITIES 0x1000
681 #define EFI_RT_SUPPORTED_QUERY_VARIABLE_INFO 0x2000
682
683 #define EFI_RT_SUPPORTED_ALL 0x3fff
684
685 #define EFI_RT_SUPPORTED_TIME_SERVICES 0x0003
686 #define EFI_RT_SUPPORTED_WAKEUP_SERVICES 0x000c
687 #define EFI_RT_SUPPORTED_VARIABLE_SERVICES 0x0070
688
689 extern struct mm_struct efi_mm;
690
mm_is_efi(struct mm_struct * mm)691 static inline bool mm_is_efi(struct mm_struct *mm)
692 {
693 return IS_ENABLED(CONFIG_EFI) && mm == &efi_mm;
694 }
695
696 static inline int
efi_guidcmp(efi_guid_t left,efi_guid_t right)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 *
efi_guid_to_str(efi_guid_t * guid,char * out)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
efi_enter_virtual_mode(void)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
efi_query_variable_store(u32 attributes,unsigned long size,bool nonblocking)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
efi_esrt_init(void)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 u64 efi_get_fdt_params(struct efi_memory_map_data *data);
757 extern struct kobject *efi_kobj;
758
759 extern int efi_reboot_quirk_mode;
760 extern bool efi_poweroff_required(void);
761
762 extern unsigned long efi_mem_attr_table;
763
764 /*
765 * efi_memattr_perm_setter - arch specific callback function passed into
766 * efi_memattr_apply_permissions() that updates the
767 * mapping permissions described by the second
768 * argument in the page tables referred to by the
769 * first argument.
770 */
771 typedef int (*efi_memattr_perm_setter)(struct mm_struct *, efi_memory_desc_t *, bool);
772
773 extern int efi_memattr_init(void);
774 extern int efi_memattr_apply_permissions(struct mm_struct *mm,
775 efi_memattr_perm_setter fn);
776
777 /*
778 * efi_memdesc_ptr - get the n-th EFI memmap descriptor
779 * @map: the start of efi memmap
780 * @desc_size: the size of space for each EFI memmap descriptor
781 * @n: the index of efi memmap descriptor
782 *
783 * EFI boot service provides the GetMemoryMap() function to get a copy of the
784 * current memory map which is an array of memory descriptors, each of
785 * which describes a contiguous block of memory. It also gets the size of the
786 * map, and the size of each descriptor, etc.
787 *
788 * Note that per section 6.2 of UEFI Spec 2.6 Errata A, the returned size of
789 * each descriptor might not be equal to sizeof(efi_memory_memdesc_t),
790 * since efi_memory_memdesc_t may be extended in the future. Thus the OS
791 * MUST use the returned size of the descriptor to find the start of each
792 * efi_memory_memdesc_t in the memory map array. This should only be used
793 * during bootup since for_each_efi_memory_desc_xxx() is available after the
794 * kernel initializes the EFI subsystem to set up struct efi_memory_map.
795 */
796 #define efi_memdesc_ptr(map, desc_size, n) \
797 (efi_memory_desc_t *)((void *)(map) + ((n) * (desc_size)))
798
799 /* Iterate through an efi_memory_map */
800 #define for_each_efi_memory_desc_in_map(m, md) \
801 for ((md) = (m)->map; \
802 (md) && ((void *)(md) + (m)->desc_size) <= (m)->map_end; \
803 (md) = (void *)(md) + (m)->desc_size)
804
805 /**
806 * for_each_efi_memory_desc - iterate over descriptors in efi.memmap
807 * @md: the efi_memory_desc_t * iterator
808 *
809 * Once the loop finishes @md must not be accessed.
810 */
811 #define for_each_efi_memory_desc(md) \
812 for_each_efi_memory_desc_in_map(&efi.memmap, md)
813
814 /*
815 * Format an EFI memory descriptor's type and attributes to a user-provided
816 * character buffer, as per snprintf(), and return the buffer.
817 */
818 char * __init efi_md_typeattr_format(char *buf, size_t size,
819 const efi_memory_desc_t *md);
820
821
822 typedef void (*efi_element_handler_t)(const char *source,
823 const void *element_data,
824 size_t element_size);
825 extern int __init parse_efi_signature_list(
826 const char *source,
827 const void *data, size_t size,
828 efi_element_handler_t (*get_handler_for_guid)(const efi_guid_t *));
829
830 /**
831 * efi_range_is_wc - check the WC bit on an address range
832 * @start: starting kvirt address
833 * @len: length of range
834 *
835 * Consult the EFI memory map and make sure it's ok to set this range WC.
836 * Returns true or false.
837 */
efi_range_is_wc(unsigned long start,unsigned long len)838 static inline int efi_range_is_wc(unsigned long start, unsigned long len)
839 {
840 unsigned long i;
841
842 for (i = 0; i < len; i += (1UL << EFI_PAGE_SHIFT)) {
843 unsigned long paddr = __pa(start + i);
844 if (!(efi_mem_attributes(paddr) & EFI_MEMORY_WC))
845 return 0;
846 }
847 /* The range checked out */
848 return 1;
849 }
850
851 /*
852 * We play games with efi_enabled so that the compiler will, if
853 * possible, remove EFI-related code altogether.
854 */
855 #define EFI_BOOT 0 /* Were we booted from EFI? */
856 #define EFI_CONFIG_TABLES 2 /* Can we use EFI config tables? */
857 #define EFI_RUNTIME_SERVICES 3 /* Can we use runtime services? */
858 #define EFI_MEMMAP 4 /* Can we use EFI memory map? */
859 #define EFI_64BIT 5 /* Is the firmware 64-bit? */
860 #define EFI_PARAVIRT 6 /* Access is via a paravirt interface */
861 #define EFI_ARCH_1 7 /* First arch-specific bit */
862 #define EFI_DBG 8 /* Print additional debug info at runtime */
863 #define EFI_MEM_ATTR 9 /* Did firmware publish an EFI_MEMORY_ATTRIBUTES table? */
864 #define EFI_MEM_NO_SOFT_RESERVE 10 /* Is the kernel configured to ignore soft reservations? */
865 #define EFI_PRESERVE_BS_REGIONS 11 /* Are EFI boot-services memory segments available? */
866
867 #ifdef CONFIG_EFI
868 /*
869 * Test whether the above EFI_* bits are enabled.
870 */
efi_enabled(int feature)871 static inline bool efi_enabled(int feature)
872 {
873 return test_bit(feature, &efi.flags) != 0;
874 }
875 extern void efi_reboot(enum reboot_mode reboot_mode, const char *__unused);
876
877 bool __pure __efi_soft_reserve_enabled(void);
878
efi_soft_reserve_enabled(void)879 static inline bool __pure efi_soft_reserve_enabled(void)
880 {
881 return IS_ENABLED(CONFIG_EFI_SOFT_RESERVE)
882 && __efi_soft_reserve_enabled();
883 }
884
efi_rt_services_supported(unsigned int mask)885 static inline bool efi_rt_services_supported(unsigned int mask)
886 {
887 return (efi.runtime_supported_mask & mask) == mask;
888 }
889 extern void efi_find_mirror(void);
890 #else
efi_enabled(int feature)891 static inline bool efi_enabled(int feature)
892 {
893 return false;
894 }
895 static inline void
efi_reboot(enum reboot_mode reboot_mode,const char * __unused)896 efi_reboot(enum reboot_mode reboot_mode, const char *__unused) {}
897
efi_soft_reserve_enabled(void)898 static inline bool efi_soft_reserve_enabled(void)
899 {
900 return false;
901 }
902
efi_rt_services_supported(unsigned int mask)903 static inline bool efi_rt_services_supported(unsigned int mask)
904 {
905 return false;
906 }
907
efi_find_mirror(void)908 static inline void efi_find_mirror(void) {}
909 #endif
910
911 extern int efi_status_to_err(efi_status_t status);
912
913 /*
914 * Variable Attributes
915 */
916 #define EFI_VARIABLE_NON_VOLATILE 0x0000000000000001
917 #define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
918 #define EFI_VARIABLE_RUNTIME_ACCESS 0x0000000000000004
919 #define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008
920 #define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010
921 #define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020
922 #define EFI_VARIABLE_APPEND_WRITE 0x0000000000000040
923
924 #define EFI_VARIABLE_MASK (EFI_VARIABLE_NON_VOLATILE | \
925 EFI_VARIABLE_BOOTSERVICE_ACCESS | \
926 EFI_VARIABLE_RUNTIME_ACCESS | \
927 EFI_VARIABLE_HARDWARE_ERROR_RECORD | \
928 EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \
929 EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \
930 EFI_VARIABLE_APPEND_WRITE)
931 /*
932 * Length of a GUID string (strlen("aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee"))
933 * not including trailing NUL
934 */
935 #define EFI_VARIABLE_GUID_LEN UUID_STRING_LEN
936
937 /*
938 * EFI Device Path information
939 */
940 #define EFI_DEV_HW 0x01
941 #define EFI_DEV_PCI 1
942 #define EFI_DEV_PCCARD 2
943 #define EFI_DEV_MEM_MAPPED 3
944 #define EFI_DEV_VENDOR 4
945 #define EFI_DEV_CONTROLLER 5
946 #define EFI_DEV_ACPI 0x02
947 #define EFI_DEV_BASIC_ACPI 1
948 #define EFI_DEV_EXPANDED_ACPI 2
949 #define EFI_DEV_MSG 0x03
950 #define EFI_DEV_MSG_ATAPI 1
951 #define EFI_DEV_MSG_SCSI 2
952 #define EFI_DEV_MSG_FC 3
953 #define EFI_DEV_MSG_1394 4
954 #define EFI_DEV_MSG_USB 5
955 #define EFI_DEV_MSG_USB_CLASS 15
956 #define EFI_DEV_MSG_I20 6
957 #define EFI_DEV_MSG_MAC 11
958 #define EFI_DEV_MSG_IPV4 12
959 #define EFI_DEV_MSG_IPV6 13
960 #define EFI_DEV_MSG_INFINIBAND 9
961 #define EFI_DEV_MSG_UART 14
962 #define EFI_DEV_MSG_VENDOR 10
963 #define EFI_DEV_MEDIA 0x04
964 #define EFI_DEV_MEDIA_HARD_DRIVE 1
965 #define EFI_DEV_MEDIA_CDROM 2
966 #define EFI_DEV_MEDIA_VENDOR 3
967 #define EFI_DEV_MEDIA_FILE 4
968 #define EFI_DEV_MEDIA_PROTOCOL 5
969 #define EFI_DEV_MEDIA_REL_OFFSET 8
970 #define EFI_DEV_BIOS_BOOT 0x05
971 #define EFI_DEV_END_PATH 0x7F
972 #define EFI_DEV_END_PATH2 0xFF
973 #define EFI_DEV_END_INSTANCE 0x01
974 #define EFI_DEV_END_ENTIRE 0xFF
975
976 struct efi_generic_dev_path {
977 u8 type;
978 u8 sub_type;
979 u16 length;
980 } __packed;
981
982 struct efi_acpi_dev_path {
983 struct efi_generic_dev_path header;
984 u32 hid;
985 u32 uid;
986 } __packed;
987
988 struct efi_pci_dev_path {
989 struct efi_generic_dev_path header;
990 u8 fn;
991 u8 dev;
992 } __packed;
993
994 struct efi_vendor_dev_path {
995 struct efi_generic_dev_path header;
996 efi_guid_t vendorguid;
997 u8 vendordata[];
998 } __packed;
999
1000 struct efi_rel_offset_dev_path {
1001 struct efi_generic_dev_path header;
1002 u32 reserved;
1003 u64 starting_offset;
1004 u64 ending_offset;
1005 } __packed;
1006
1007 struct efi_mem_mapped_dev_path {
1008 struct efi_generic_dev_path header;
1009 u32 memory_type;
1010 u64 starting_addr;
1011 u64 ending_addr;
1012 } __packed;
1013
1014 struct efi_file_path_dev_path {
1015 struct efi_generic_dev_path header;
1016 efi_char16_t filename[];
1017 } __packed;
1018
1019 struct efi_dev_path {
1020 union {
1021 struct efi_generic_dev_path header;
1022 struct efi_acpi_dev_path acpi;
1023 struct efi_pci_dev_path pci;
1024 struct efi_vendor_dev_path vendor;
1025 struct efi_rel_offset_dev_path rel_offset;
1026 };
1027 } __packed;
1028
1029 struct device *efi_get_device_by_path(const struct efi_dev_path **node,
1030 size_t *len);
1031
memrange_efi_to_native(u64 * addr,u64 * npages)1032 static inline void memrange_efi_to_native(u64 *addr, u64 *npages)
1033 {
1034 *npages = PFN_UP(*addr + (*npages<<EFI_PAGE_SHIFT)) - PFN_DOWN(*addr);
1035 *addr &= PAGE_MASK;
1036 }
1037
1038 /*
1039 * EFI Variable support.
1040 *
1041 * Different firmware drivers can expose their EFI-like variables using
1042 * the following.
1043 */
1044
1045 struct efivar_operations {
1046 efi_get_variable_t *get_variable;
1047 efi_get_next_variable_t *get_next_variable;
1048 efi_set_variable_t *set_variable;
1049 efi_set_variable_t *set_variable_nonblocking;
1050 efi_query_variable_store_t *query_variable_store;
1051 efi_query_variable_info_t *query_variable_info;
1052 };
1053
1054 struct efivars {
1055 struct kset *kset;
1056 const struct efivar_operations *ops;
1057 };
1058
1059 #ifdef CONFIG_X86
1060 u64 __attribute_const__ efivar_reserved_space(void);
1061 #else
efivar_reserved_space(void)1062 static inline u64 efivar_reserved_space(void) { return 0; }
1063 #endif
1064
1065 /*
1066 * There is no actual upper limit specified for the variable name size.
1067 *
1068 * This limit exists only for practical purposes, since name conversions
1069 * are bounds-checked and name data is occasionally stored in-line.
1070 */
1071 #define EFI_VAR_NAME_LEN 1024
1072
1073 int efivars_register(struct efivars *efivars,
1074 const struct efivar_operations *ops);
1075 int efivars_unregister(struct efivars *efivars);
1076
1077 #ifdef CONFIG_EFI
1078 bool efivar_is_available(void);
1079 #else
efivar_is_available(void)1080 static inline bool efivar_is_available(void) { return false; }
1081 #endif
1082
1083 bool efivar_supports_writes(void);
1084
1085 int efivar_lock(void);
1086 int efivar_trylock(void);
1087 void efivar_unlock(void);
1088
1089 efi_status_t efivar_get_variable(efi_char16_t *name, efi_guid_t *vendor,
1090 u32 *attr, unsigned long *size, void *data);
1091
1092 efi_status_t efivar_get_next_variable(unsigned long *name_size,
1093 efi_char16_t *name, efi_guid_t *vendor);
1094
1095 efi_status_t efivar_set_variable_locked(efi_char16_t *name, efi_guid_t *vendor,
1096 u32 attr, unsigned long data_size,
1097 void *data, bool nonblocking);
1098
1099 efi_status_t efivar_set_variable(efi_char16_t *name, efi_guid_t *vendor,
1100 u32 attr, unsigned long data_size, void *data);
1101
1102 efi_status_t efivar_query_variable_info(u32 attr, u64 *storage_space,
1103 u64 *remaining_space,
1104 u64 *max_variable_size);
1105
1106 #if IS_ENABLED(CONFIG_EFI_CAPSULE_LOADER)
1107 extern bool efi_capsule_pending(int *reset_type);
1108
1109 extern int efi_capsule_supported(efi_guid_t guid, u32 flags,
1110 size_t size, int *reset);
1111
1112 extern int efi_capsule_update(efi_capsule_header_t *capsule,
1113 phys_addr_t *pages);
1114 #else
efi_capsule_pending(int * reset_type)1115 static inline bool efi_capsule_pending(int *reset_type) { return false; }
1116 #endif
1117
1118 #ifdef CONFIG_EFI
1119 extern bool efi_runtime_disabled(void);
1120 #else
efi_runtime_disabled(void)1121 static inline bool efi_runtime_disabled(void) { return true; }
1122 #endif
1123
1124 extern void efi_call_virt_check_flags(unsigned long flags, const void *caller);
1125 extern unsigned long efi_call_virt_save_flags(void);
1126
1127 enum efi_secureboot_mode {
1128 efi_secureboot_mode_unset,
1129 efi_secureboot_mode_unknown,
1130 efi_secureboot_mode_disabled,
1131 efi_secureboot_mode_enabled,
1132 };
1133
1134 static inline
efi_get_secureboot_mode(efi_get_variable_t * get_var)1135 enum efi_secureboot_mode efi_get_secureboot_mode(efi_get_variable_t *get_var)
1136 {
1137 u8 secboot, setupmode = 0;
1138 efi_status_t status;
1139 unsigned long size;
1140
1141 size = sizeof(secboot);
1142 status = get_var(L"SecureBoot", &EFI_GLOBAL_VARIABLE_GUID, NULL, &size,
1143 &secboot);
1144 if (status == EFI_NOT_FOUND)
1145 return efi_secureboot_mode_disabled;
1146 if (status != EFI_SUCCESS)
1147 return efi_secureboot_mode_unknown;
1148
1149 size = sizeof(setupmode);
1150 get_var(L"SetupMode", &EFI_GLOBAL_VARIABLE_GUID, NULL, &size, &setupmode);
1151 if (secboot == 0 || setupmode == 1)
1152 return efi_secureboot_mode_disabled;
1153 return efi_secureboot_mode_enabled;
1154 }
1155
1156 #ifdef CONFIG_EFI_EMBEDDED_FIRMWARE
1157 void efi_check_for_embedded_firmwares(void);
1158 #else
efi_check_for_embedded_firmwares(void)1159 static inline void efi_check_for_embedded_firmwares(void) { }
1160 #endif
1161
1162 #define arch_efi_call_virt(p, f, args...) ((p)->f(args))
1163
1164 /*
1165 * Arch code must implement the following three routines:
1166 *
1167 * * arch_efi_call_virt_setup()
1168 *
1169 * Sets up the environment for the call (e.g. switching page tables,
1170 * allowing kernel-mode use of floating point, if required).
1171 *
1172 * * arch_efi_call_virt()
1173 *
1174 * Performs the call. This routine takes a variable number of arguments so
1175 * it must be implemented as a variadic preprocessor macro.
1176 *
1177 * * arch_efi_call_virt_teardown()
1178 *
1179 * Restores the usual kernel environment once the call has returned.
1180 */
1181
1182 #define efi_call_virt_pointer(p, f, args...) \
1183 ({ \
1184 typeof((p)->f(args)) __s; \
1185 unsigned long __flags; \
1186 \
1187 arch_efi_call_virt_setup(); \
1188 \
1189 __flags = efi_call_virt_save_flags(); \
1190 __s = arch_efi_call_virt(p, f, args); \
1191 efi_call_virt_check_flags(__flags, NULL); \
1192 \
1193 arch_efi_call_virt_teardown(); \
1194 \
1195 __s; \
1196 })
1197
1198 #define EFI_RANDOM_SEED_SIZE 32U // BLAKE2S_HASH_SIZE
1199
1200 struct linux_efi_random_seed {
1201 u32 size;
1202 u8 bits[];
1203 };
1204
1205 struct linux_efi_tpm_eventlog {
1206 u32 size;
1207 u32 final_events_preboot_size;
1208 u8 version;
1209 u8 log[];
1210 };
1211
1212 extern int efi_tpm_eventlog_init(void);
1213
1214 struct efi_tcg2_final_events_table {
1215 u64 version;
1216 u64 nr_events;
1217 u8 events[];
1218 };
1219 extern int efi_tpm_final_log_size;
1220
1221 extern unsigned long rci2_table_phys;
1222
1223 efi_status_t
1224 efi_call_acpi_prm_handler(efi_status_t (__efiapi *handler_addr)(u64, void *),
1225 u64 param_buffer_addr, void *context);
1226
1227 /*
1228 * efi_runtime_service() function identifiers.
1229 * "NONE" is used by efi_recover_from_page_fault() to check if the page
1230 * fault happened while executing an efi runtime service.
1231 */
1232 enum efi_rts_ids {
1233 EFI_NONE,
1234 EFI_GET_TIME,
1235 EFI_SET_TIME,
1236 EFI_GET_WAKEUP_TIME,
1237 EFI_SET_WAKEUP_TIME,
1238 EFI_GET_VARIABLE,
1239 EFI_GET_NEXT_VARIABLE,
1240 EFI_SET_VARIABLE,
1241 EFI_QUERY_VARIABLE_INFO,
1242 EFI_GET_NEXT_HIGH_MONO_COUNT,
1243 EFI_RESET_SYSTEM,
1244 EFI_UPDATE_CAPSULE,
1245 EFI_QUERY_CAPSULE_CAPS,
1246 EFI_ACPI_PRM_HANDLER,
1247 };
1248
1249 union efi_rts_args;
1250
1251 /*
1252 * efi_runtime_work: Details of EFI Runtime Service work
1253 * @args: Pointer to union describing the arguments
1254 * @status: Status of executing EFI Runtime Service
1255 * @efi_rts_id: EFI Runtime Service function identifier
1256 * @efi_rts_comp: Struct used for handling completions
1257 * @caller: The caller of the runtime service
1258 */
1259 struct efi_runtime_work {
1260 union efi_rts_args *args;
1261 efi_status_t status;
1262 struct work_struct work;
1263 enum efi_rts_ids efi_rts_id;
1264 struct completion efi_rts_comp;
1265 const void *caller;
1266 };
1267
1268 extern struct efi_runtime_work efi_rts_work;
1269
1270 /* Workqueue to queue EFI Runtime Services */
1271 extern struct workqueue_struct *efi_rts_wq;
1272
1273 struct linux_efi_memreserve {
1274 int size; // allocated size of the array
1275 atomic_t count; // number of entries used
1276 phys_addr_t next; // pa of next struct instance
1277 struct {
1278 phys_addr_t base;
1279 phys_addr_t size;
1280 } entry[];
1281 };
1282
1283 #define EFI_MEMRESERVE_COUNT(size) (((size) - sizeof(struct linux_efi_memreserve)) \
1284 / sizeof_field(struct linux_efi_memreserve, entry[0]))
1285
1286 void __init efi_arch_mem_reserve(phys_addr_t addr, u64 size);
1287
1288 /*
1289 * The LINUX_EFI_MOK_VARIABLE_TABLE_GUID config table can be provided
1290 * to the kernel by an EFI boot loader. The table contains a packed
1291 * sequence of these entries, one for each named MOK variable.
1292 * The sequence is terminated by an entry with a completely NULL
1293 * name and 0 data size.
1294 */
1295 struct efi_mokvar_table_entry {
1296 char name[256];
1297 u64 data_size;
1298 u8 data[];
1299 } __attribute((packed));
1300
1301 #ifdef CONFIG_LOAD_UEFI_KEYS
1302 extern void __init efi_mokvar_table_init(void);
1303 extern struct efi_mokvar_table_entry *efi_mokvar_entry_next(
1304 struct efi_mokvar_table_entry **mokvar_entry);
1305 extern struct efi_mokvar_table_entry *efi_mokvar_entry_find(const char *name);
1306 #else
efi_mokvar_table_init(void)1307 static inline void efi_mokvar_table_init(void) { }
efi_mokvar_entry_next(struct efi_mokvar_table_entry ** mokvar_entry)1308 static inline struct efi_mokvar_table_entry *efi_mokvar_entry_next(
1309 struct efi_mokvar_table_entry **mokvar_entry)
1310 {
1311 return NULL;
1312 }
efi_mokvar_entry_find(const char * name)1313 static inline struct efi_mokvar_table_entry *efi_mokvar_entry_find(
1314 const char *name)
1315 {
1316 return NULL;
1317 }
1318 #endif
1319
1320 extern void efifb_setup_from_dmi(struct screen_info *si, const char *opt);
1321
1322 struct linux_efi_coco_secret_area {
1323 u64 base_pa;
1324 u64 size;
1325 };
1326
1327 struct linux_efi_initrd {
1328 unsigned long base;
1329 unsigned long size;
1330 };
1331
1332 /* Header of a populated EFI secret area */
1333 #define EFI_SECRET_TABLE_HEADER_GUID EFI_GUID(0x1e74f542, 0x71dd, 0x4d66, 0x96, 0x3e, 0xef, 0x42, 0x87, 0xff, 0x17, 0x3b)
1334
1335 bool xen_efi_config_table_is_usable(const efi_guid_t *guid, unsigned long table);
1336
1337 static inline
efi_config_table_is_usable(const efi_guid_t * guid,unsigned long table)1338 bool efi_config_table_is_usable(const efi_guid_t *guid, unsigned long table)
1339 {
1340 if (!IS_ENABLED(CONFIG_XEN_EFI))
1341 return true;
1342 return xen_efi_config_table_is_usable(guid, table);
1343 }
1344
1345 umode_t efi_attr_is_visible(struct kobject *kobj, struct attribute *attr, int n);
1346
1347 /*
1348 * efivar ops event type
1349 */
1350 #define EFIVAR_OPS_RDONLY 0
1351 #define EFIVAR_OPS_RDWR 1
1352
1353 extern struct blocking_notifier_head efivar_ops_nh;
1354
1355 void efivars_generic_ops_register(void);
1356 void efivars_generic_ops_unregister(void);
1357
1358 #endif /* _LINUX_EFI_H */
1359