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 ((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 guid;
149 u32 headersize;
150 u32 flags;
151 u32 imagesize;
152 } efi_capsule_header_t;
153
154 /* EFI_FIRMWARE_MANAGEMENT_CAPSULE_HEADER */
155 struct efi_manage_capsule_header {
156 u32 ver;
157 u16 emb_drv_cnt;
158 u16 payload_cnt;
159 /*
160 * Variable-size array of the size given by the sum of
161 * emb_drv_cnt and payload_cnt.
162 */
163 u64 offset_list[];
164 } __packed;
165
166 /* EFI_FIRMWARE_MANAGEMENT_CAPSULE_IMAGE_HEADER */
167 struct efi_manage_capsule_image_header {
168 u32 ver;
169 efi_guid_t image_type_id;
170 u8 image_index;
171 u8 reserved_bytes[3];
172 u32 image_size;
173 u32 vendor_code_size;
174 /* hw_ins was introduced in version 2 */
175 u64 hw_ins;
176 /* capsule_support was introduced in version 3 */
177 u64 capsule_support;
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 header;
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_LOAD_FILE_PROTOCOL_GUID EFI_GUID(0x56ec3091, 0x954c, 0x11d2, 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
390 #define EFI_LOAD_FILE2_PROTOCOL_GUID EFI_GUID(0x4006c0c1, 0xfcb3, 0x403e, 0x99, 0x6d, 0x4a, 0x6c, 0x87, 0x24, 0xe0, 0x6d)
391 #define EFI_RT_PROPERTIES_TABLE_GUID EFI_GUID(0xeb66918a, 0x7eef, 0x402a, 0x84, 0x2e, 0x93, 0x1d, 0x21, 0xc3, 0x8a, 0xe9)
392 #define EFI_DXE_SERVICES_TABLE_GUID EFI_GUID(0x05ad34ba, 0x6f02, 0x4214, 0x95, 0x2e, 0x4d, 0xa0, 0x39, 0x8e, 0x2b, 0xb9)
393 #define EFI_SMBIOS_PROTOCOL_GUID EFI_GUID(0x03583ff6, 0xcb36, 0x4940, 0x94, 0x7e, 0xb9, 0xb3, 0x9f, 0x4a, 0xfa, 0xf7)
394 #define EFI_MEMORY_ATTRIBUTE_PROTOCOL_GUID EFI_GUID(0xf4560cf6, 0x40ec, 0x4b4a, 0xa1, 0x92, 0xbf, 0x1d, 0x57, 0xd0, 0xb1, 0x89)
395
396 #define EFI_IMAGE_SECURITY_DATABASE_GUID EFI_GUID(0xd719b2cb, 0x3d3a, 0x4596, 0xa3, 0xbc, 0xda, 0xd0, 0x0e, 0x67, 0x65, 0x6f)
397 #define EFI_SHIM_LOCK_GUID EFI_GUID(0x605dab50, 0xe046, 0x4300, 0xab, 0xb6, 0x3d, 0xd8, 0x10, 0xdd, 0x8b, 0x23)
398
399 #define EFI_CERT_SHA256_GUID EFI_GUID(0xc1c41626, 0x504c, 0x4092, 0xac, 0xa9, 0x41, 0xf9, 0x36, 0x93, 0x43, 0x28)
400 #define EFI_CERT_X509_GUID EFI_GUID(0xa5c059a1, 0x94e4, 0x4aa7, 0x87, 0xb5, 0xab, 0x15, 0x5c, 0x2b, 0xf0, 0x72)
401 #define EFI_CERT_X509_SHA256_GUID EFI_GUID(0x3bd2a492, 0x96c0, 0x4079, 0xb4, 0x20, 0xfc, 0xf9, 0x8e, 0xf1, 0x03, 0xed)
402 #define EFI_CC_BLOB_GUID EFI_GUID(0x067b1f5f, 0xcf26, 0x44c5, 0x85, 0x54, 0x93, 0xd7, 0x77, 0x91, 0x2d, 0x42)
403
404 /*
405 * This GUID is used to pass to the kernel proper the struct screen_info
406 * structure that was populated by the stub based on the GOP protocol instance
407 * associated with ConOut
408 */
409 #define LINUX_EFI_SCREEN_INFO_TABLE_GUID EFI_GUID(0xe03fc20a, 0x85dc, 0x406e, 0xb9, 0x0e, 0x4a, 0xb5, 0x02, 0x37, 0x1d, 0x95)
410 #define LINUX_EFI_ARM_CPU_STATE_TABLE_GUID EFI_GUID(0xef79e4aa, 0x3c3d, 0x4989, 0xb9, 0x02, 0x07, 0xa9, 0x43, 0xe5, 0x50, 0xd2)
411 #define LINUX_EFI_LOADER_ENTRY_GUID EFI_GUID(0x4a67b082, 0x0a4c, 0x41cf, 0xb6, 0xc7, 0x44, 0x0b, 0x29, 0xbb, 0x8c, 0x4f)
412 #define LINUX_EFI_RANDOM_SEED_TABLE_GUID EFI_GUID(0x1ce1e5bc, 0x7ceb, 0x42f2, 0x81, 0xe5, 0x8a, 0xad, 0xf1, 0x80, 0xf5, 0x7b)
413 #define LINUX_EFI_TPM_EVENT_LOG_GUID EFI_GUID(0xb7799cb0, 0xeca2, 0x4943, 0x96, 0x67, 0x1f, 0xae, 0x07, 0xb7, 0x47, 0xfa)
414 #define LINUX_EFI_TPM_FINAL_LOG_GUID EFI_GUID(0x1e2ed096, 0x30e2, 0x4254, 0xbd, 0x89, 0x86, 0x3b, 0xbe, 0xf8, 0x23, 0x25)
415 #define LINUX_EFI_MEMRESERVE_TABLE_GUID EFI_GUID(0x888eb0c6, 0x8ede, 0x4ff5, 0xa8, 0xf0, 0x9a, 0xee, 0x5c, 0xb9, 0x77, 0xc2)
416 #define LINUX_EFI_INITRD_MEDIA_GUID EFI_GUID(0x5568e427, 0x68fc, 0x4f3d, 0xac, 0x74, 0xca, 0x55, 0x52, 0x31, 0xcc, 0x68)
417 #define LINUX_EFI_MOK_VARIABLE_TABLE_GUID EFI_GUID(0xc451ed2b, 0x9694, 0x45d3, 0xba, 0xba, 0xed, 0x9f, 0x89, 0x88, 0xa3, 0x89)
418 #define LINUX_EFI_COCO_SECRET_AREA_GUID EFI_GUID(0xadf956ad, 0xe98c, 0x484c, 0xae, 0x11, 0xb5, 0x1c, 0x7d, 0x33, 0x64, 0x47)
419 #define LINUX_EFI_BOOT_MEMMAP_GUID EFI_GUID(0x800f683f, 0xd08b, 0x423a, 0xa2, 0x93, 0x96, 0x5c, 0x3c, 0x6f, 0xe2, 0xb4)
420 #define LINUX_EFI_UNACCEPTED_MEM_TABLE_GUID EFI_GUID(0xd5d1de3c, 0x105c, 0x44f9, 0x9e, 0xa9, 0xbc, 0xef, 0x98, 0x12, 0x00, 0x31)
421
422 #define RISCV_EFI_BOOT_PROTOCOL_GUID EFI_GUID(0xccd15fec, 0x6f73, 0x4eec, 0x83, 0x95, 0x3e, 0x69, 0xe4, 0xb9, 0x40, 0xbf)
423
424 /*
425 * This GUID may be installed onto the kernel image's handle as a NULL protocol
426 * to signal to the stub that the placement of the image should be respected,
427 * and moving the image in physical memory is undesirable. To ensure
428 * compatibility with 64k pages kernels with virtually mapped stacks, and to
429 * avoid defeating physical randomization, this protocol should only be
430 * installed if the image was placed at a randomized 128k aligned address in
431 * memory.
432 */
433 #define LINUX_EFI_LOADED_IMAGE_FIXED_GUID EFI_GUID(0xf5a37b6d, 0x3344, 0x42a5, 0xb6, 0xbb, 0x97, 0x86, 0x48, 0xc1, 0x89, 0x0a)
434
435 /* OEM GUIDs */
436 #define DELLEMC_EFI_RCI2_TABLE_GUID EFI_GUID(0x2d9f28a2, 0xa886, 0x456a, 0x97, 0xa8, 0xf1, 0x1e, 0xf2, 0x4f, 0xf4, 0x55)
437 #define AMD_SEV_MEM_ENCRYPT_GUID EFI_GUID(0x0cf29b71, 0x9e51, 0x433a, 0xa3, 0xb7, 0x81, 0xf3, 0xab, 0x16, 0xb8, 0x75)
438
439 /* OVMF protocol GUIDs */
440 #define OVMF_SEV_MEMORY_ACCEPTANCE_PROTOCOL_GUID EFI_GUID(0xc5a010fe, 0x38a7, 0x4531, 0x8a, 0x4a, 0x05, 0x00, 0xd2, 0xfd, 0x16, 0x49)
441
442 typedef struct {
443 efi_guid_t guid;
444 u64 table;
445 } efi_config_table_64_t;
446
447 typedef struct {
448 efi_guid_t guid;
449 u32 table;
450 } efi_config_table_32_t;
451
452 typedef union {
453 struct {
454 efi_guid_t guid;
455 void *table;
456 };
457 efi_config_table_32_t mixed_mode;
458 } efi_config_table_t;
459
460 typedef struct {
461 efi_guid_t guid;
462 unsigned long *ptr;
463 const char name[16];
464 } efi_config_table_type_t;
465
466 #define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL)
467 #define EFI_DXE_SERVICES_TABLE_SIGNATURE ((u64)0x565245535f455844ULL)
468
469 #define EFI_2_30_SYSTEM_TABLE_REVISION ((2 << 16) | (30))
470 #define EFI_2_20_SYSTEM_TABLE_REVISION ((2 << 16) | (20))
471 #define EFI_2_10_SYSTEM_TABLE_REVISION ((2 << 16) | (10))
472 #define EFI_2_00_SYSTEM_TABLE_REVISION ((2 << 16) | (00))
473 #define EFI_1_10_SYSTEM_TABLE_REVISION ((1 << 16) | (10))
474 #define EFI_1_02_SYSTEM_TABLE_REVISION ((1 << 16) | (02))
475
476 typedef struct {
477 efi_table_hdr_t hdr;
478 u64 fw_vendor; /* physical addr of CHAR16 vendor string */
479 u32 fw_revision;
480 u32 __pad1;
481 u64 con_in_handle;
482 u64 con_in;
483 u64 con_out_handle;
484 u64 con_out;
485 u64 stderr_handle;
486 u64 stderr;
487 u64 runtime;
488 u64 boottime;
489 u32 nr_tables;
490 u32 __pad2;
491 u64 tables;
492 } efi_system_table_64_t;
493
494 typedef struct {
495 efi_table_hdr_t hdr;
496 u32 fw_vendor; /* physical addr of CHAR16 vendor string */
497 u32 fw_revision;
498 u32 con_in_handle;
499 u32 con_in;
500 u32 con_out_handle;
501 u32 con_out;
502 u32 stderr_handle;
503 u32 stderr;
504 u32 runtime;
505 u32 boottime;
506 u32 nr_tables;
507 u32 tables;
508 } efi_system_table_32_t;
509
510 typedef union efi_simple_text_input_protocol efi_simple_text_input_protocol_t;
511 typedef union efi_simple_text_output_protocol efi_simple_text_output_protocol_t;
512
513 typedef union {
514 struct {
515 efi_table_hdr_t hdr;
516 unsigned long fw_vendor; /* physical addr of CHAR16 vendor string */
517 u32 fw_revision;
518 unsigned long con_in_handle;
519 efi_simple_text_input_protocol_t *con_in;
520 unsigned long con_out_handle;
521 efi_simple_text_output_protocol_t *con_out;
522 unsigned long stderr_handle;
523 unsigned long stderr;
524 efi_runtime_services_t *runtime;
525 efi_boot_services_t *boottime;
526 unsigned long nr_tables;
527 unsigned long tables;
528 };
529 efi_system_table_32_t mixed_mode;
530 } efi_system_table_t;
531
532 struct efi_boot_memmap {
533 unsigned long map_size;
534 unsigned long desc_size;
535 u32 desc_ver;
536 unsigned long map_key;
537 unsigned long buff_size;
538 efi_memory_desc_t map[];
539 };
540
541 struct efi_unaccepted_memory {
542 u32 version;
543 u32 unit_size;
544 u64 phys_base;
545 u64 size;
546 unsigned long bitmap[];
547 };
548
549 /*
550 * Architecture independent structure for describing a memory map for the
551 * benefit of efi_memmap_init_early(), and for passing context between
552 * efi_memmap_alloc() and efi_memmap_install().
553 */
554 struct efi_memory_map_data {
555 phys_addr_t phys_map;
556 unsigned long size;
557 unsigned long desc_version;
558 unsigned long desc_size;
559 unsigned long flags;
560 };
561
562 struct efi_memory_map {
563 phys_addr_t phys_map;
564 void *map;
565 void *map_end;
566 int nr_map;
567 unsigned long desc_version;
568 unsigned long desc_size;
569 #define EFI_MEMMAP_LATE (1UL << 0)
570 #define EFI_MEMMAP_MEMBLOCK (1UL << 1)
571 #define EFI_MEMMAP_SLAB (1UL << 2)
572 unsigned long flags;
573 };
574
575 struct efi_mem_range {
576 struct range range;
577 u64 attribute;
578 };
579
580 typedef struct {
581 u32 version;
582 u32 length;
583 u64 memory_protection_attribute;
584 } efi_properties_table_t;
585
586 #define EFI_PROPERTIES_TABLE_VERSION 0x00010000
587 #define EFI_PROPERTIES_RUNTIME_MEMORY_PROTECTION_NON_EXECUTABLE_PE_DATA 0x1
588
589 typedef struct {
590 u16 version;
591 u16 length;
592 u32 runtime_services_supported;
593 } efi_rt_properties_table_t;
594
595 #define EFI_RT_PROPERTIES_TABLE_VERSION 0x1
596
597 #define EFI_INVALID_TABLE_ADDR (~0UL)
598
599 // BIT0 implies that Runtime code includes the forward control flow guard
600 // instruction, such as X86 CET-IBT or ARM BTI.
601 #define EFI_MEMORY_ATTRIBUTES_FLAGS_RT_FORWARD_CONTROL_FLOW_GUARD 0x1
602
603 typedef struct {
604 u32 version;
605 u32 num_entries;
606 u32 desc_size;
607 u32 flags;
608 efi_memory_desc_t entry[0];
609 } efi_memory_attributes_table_t;
610
611 typedef struct {
612 efi_guid_t signature_owner;
613 u8 signature_data[];
614 } efi_signature_data_t;
615
616 typedef struct {
617 efi_guid_t signature_type;
618 u32 signature_list_size;
619 u32 signature_header_size;
620 u32 signature_size;
621 u8 signature_header[];
622 /* efi_signature_data_t signatures[][] */
623 } efi_signature_list_t;
624
625 typedef u8 efi_sha256_hash_t[32];
626
627 typedef struct {
628 efi_sha256_hash_t to_be_signed_hash;
629 efi_time_t time_of_revocation;
630 } efi_cert_x509_sha256_t;
631
632 extern unsigned long __ro_after_init efi_rng_seed; /* RNG Seed table */
633
634 /*
635 * All runtime access to EFI goes through this structure:
636 */
637 extern struct efi {
638 const efi_runtime_services_t *runtime; /* EFI runtime services table */
639 unsigned int runtime_version; /* Runtime services version */
640 unsigned int runtime_supported_mask;
641
642 unsigned long acpi; /* ACPI table (IA64 ext 0.71) */
643 unsigned long acpi20; /* ACPI table (ACPI 2.0) */
644 unsigned long smbios; /* SMBIOS table (32 bit entry point) */
645 unsigned long smbios3; /* SMBIOS table (64 bit entry point) */
646 unsigned long esrt; /* ESRT table */
647 unsigned long tpm_log; /* TPM2 Event Log table */
648 unsigned long tpm_final_log; /* TPM2 Final Events Log table */
649 unsigned long mokvar_table; /* MOK variable config table */
650 unsigned long coco_secret; /* Confidential computing secret table */
651 unsigned long unaccepted; /* Unaccepted memory table */
652
653 efi_get_time_t *get_time;
654 efi_set_time_t *set_time;
655 efi_get_wakeup_time_t *get_wakeup_time;
656 efi_set_wakeup_time_t *set_wakeup_time;
657 efi_get_variable_t *get_variable;
658 efi_get_next_variable_t *get_next_variable;
659 efi_set_variable_t *set_variable;
660 efi_set_variable_t *set_variable_nonblocking;
661 efi_query_variable_info_t *query_variable_info;
662 efi_query_variable_info_t *query_variable_info_nonblocking;
663 efi_update_capsule_t *update_capsule;
664 efi_query_capsule_caps_t *query_capsule_caps;
665 efi_get_next_high_mono_count_t *get_next_high_mono_count;
666 efi_reset_system_t *reset_system;
667
668 struct efi_memory_map memmap;
669 unsigned long flags;
670 } efi;
671
672 #define EFI_RT_SUPPORTED_GET_TIME 0x0001
673 #define EFI_RT_SUPPORTED_SET_TIME 0x0002
674 #define EFI_RT_SUPPORTED_GET_WAKEUP_TIME 0x0004
675 #define EFI_RT_SUPPORTED_SET_WAKEUP_TIME 0x0008
676 #define EFI_RT_SUPPORTED_GET_VARIABLE 0x0010
677 #define EFI_RT_SUPPORTED_GET_NEXT_VARIABLE_NAME 0x0020
678 #define EFI_RT_SUPPORTED_SET_VARIABLE 0x0040
679 #define EFI_RT_SUPPORTED_SET_VIRTUAL_ADDRESS_MAP 0x0080
680 #define EFI_RT_SUPPORTED_CONVERT_POINTER 0x0100
681 #define EFI_RT_SUPPORTED_GET_NEXT_HIGH_MONOTONIC_COUNT 0x0200
682 #define EFI_RT_SUPPORTED_RESET_SYSTEM 0x0400
683 #define EFI_RT_SUPPORTED_UPDATE_CAPSULE 0x0800
684 #define EFI_RT_SUPPORTED_QUERY_CAPSULE_CAPABILITIES 0x1000
685 #define EFI_RT_SUPPORTED_QUERY_VARIABLE_INFO 0x2000
686
687 #define EFI_RT_SUPPORTED_ALL 0x3fff
688
689 #define EFI_RT_SUPPORTED_TIME_SERVICES 0x0003
690 #define EFI_RT_SUPPORTED_WAKEUP_SERVICES 0x000c
691 #define EFI_RT_SUPPORTED_VARIABLE_SERVICES 0x0070
692
693 extern struct mm_struct efi_mm;
694
695 static inline int
efi_guidcmp(efi_guid_t left,efi_guid_t right)696 efi_guidcmp (efi_guid_t left, efi_guid_t right)
697 {
698 return memcmp(&left, &right, sizeof (efi_guid_t));
699 }
700
701 static inline char *
efi_guid_to_str(efi_guid_t * guid,char * out)702 efi_guid_to_str(efi_guid_t *guid, char *out)
703 {
704 sprintf(out, "%pUl", guid->b);
705 return out;
706 }
707
708 extern void efi_init (void);
709 extern void efi_earlycon_reprobe(void);
710 #ifdef CONFIG_EFI
711 extern void efi_enter_virtual_mode (void); /* switch EFI to virtual mode, if possible */
712 #else
efi_enter_virtual_mode(void)713 static inline void efi_enter_virtual_mode (void) {}
714 #endif
715 #ifdef CONFIG_X86
716 extern efi_status_t efi_query_variable_store(u32 attributes,
717 unsigned long size,
718 bool nonblocking);
719 #else
720
efi_query_variable_store(u32 attributes,unsigned long size,bool nonblocking)721 static inline efi_status_t efi_query_variable_store(u32 attributes,
722 unsigned long size,
723 bool nonblocking)
724 {
725 return EFI_SUCCESS;
726 }
727 #endif
728
729 extern int __init __efi_memmap_init(struct efi_memory_map_data *data);
730 extern int __init efi_memmap_init_early(struct efi_memory_map_data *data);
731 extern int __init efi_memmap_init_late(phys_addr_t addr, unsigned long size);
732 extern void __init efi_memmap_unmap(void);
733
734 #ifdef CONFIG_EFI_ESRT
735 extern void __init efi_esrt_init(void);
736 #else
efi_esrt_init(void)737 static inline void efi_esrt_init(void) { }
738 #endif
739 extern int efi_config_parse_tables(const efi_config_table_t *config_tables,
740 int count,
741 const efi_config_table_type_t *arch_tables);
742 extern int efi_systab_check_header(const efi_table_hdr_t *systab_hdr);
743 extern void efi_systab_report_header(const efi_table_hdr_t *systab_hdr,
744 unsigned long fw_vendor);
745 extern u64 efi_get_iobase (void);
746 extern int efi_mem_type(unsigned long phys_addr);
747 extern u64 efi_mem_attributes (unsigned long phys_addr);
748 extern u64 efi_mem_attribute (unsigned long phys_addr, unsigned long size);
749 extern int __init efi_uart_console_only (void);
750 extern u64 efi_mem_desc_end(efi_memory_desc_t *md);
751 extern int efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md);
752 extern int __efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md);
753 extern void efi_mem_reserve(phys_addr_t addr, u64 size);
754 extern int efi_mem_reserve_persistent(phys_addr_t addr, u64 size);
755 extern void efi_initialize_iomem_resources(struct resource *code_resource,
756 struct resource *data_resource, struct resource *bss_resource);
757 extern u64 efi_get_fdt_params(struct efi_memory_map_data *data);
758 extern struct kobject *efi_kobj;
759
760 extern int efi_reboot_quirk_mode;
761 extern bool efi_poweroff_required(void);
762
763 extern unsigned long efi_mem_attr_table;
764
765 /*
766 * efi_memattr_perm_setter - arch specific callback function passed into
767 * efi_memattr_apply_permissions() that updates the
768 * mapping permissions described by the second
769 * argument in the page tables referred to by the
770 * first argument.
771 */
772 typedef int (*efi_memattr_perm_setter)(struct mm_struct *, efi_memory_desc_t *, bool);
773
774 extern int efi_memattr_init(void);
775 extern int efi_memattr_apply_permissions(struct mm_struct *mm,
776 efi_memattr_perm_setter fn);
777
778 /*
779 * efi_early_memdesc_ptr - get the n-th EFI memmap descriptor
780 * @map: the start of efi memmap
781 * @desc_size: the size of space for each EFI memmap descriptor
782 * @n: the index of efi memmap descriptor
783 *
784 * EFI boot service provides the GetMemoryMap() function to get a copy of the
785 * current memory map which is an array of memory descriptors, each of
786 * which describes a contiguous block of memory. It also gets the size of the
787 * map, and the size of each descriptor, etc.
788 *
789 * Note that per section 6.2 of UEFI Spec 2.6 Errata A, the returned size of
790 * each descriptor might not be equal to sizeof(efi_memory_memdesc_t),
791 * since efi_memory_memdesc_t may be extended in the future. Thus the OS
792 * MUST use the returned size of the descriptor to find the start of each
793 * efi_memory_memdesc_t in the memory map array. This should only be used
794 * during bootup since for_each_efi_memory_desc_xxx() is available after the
795 * kernel initializes the EFI subsystem to set up struct efi_memory_map.
796 */
797 #define efi_early_memdesc_ptr(map, desc_size, n) \
798 (efi_memory_desc_t *)((void *)(map) + ((n) * (desc_size)))
799
800 /* Iterate through an efi_memory_map */
801 #define for_each_efi_memory_desc_in_map(m, md) \
802 for ((md) = (m)->map; \
803 (md) && ((void *)(md) + (m)->desc_size) <= (m)->map_end; \
804 (md) = (void *)(md) + (m)->desc_size)
805
806 /**
807 * for_each_efi_memory_desc - iterate over descriptors in efi.memmap
808 * @md: the efi_memory_desc_t * iterator
809 *
810 * Once the loop finishes @md must not be accessed.
811 */
812 #define for_each_efi_memory_desc(md) \
813 for_each_efi_memory_desc_in_map(&efi.memmap, md)
814
815 /*
816 * Format an EFI memory descriptor's type and attributes to a user-provided
817 * character buffer, as per snprintf(), and return the buffer.
818 */
819 char * __init efi_md_typeattr_format(char *buf, size_t size,
820 const efi_memory_desc_t *md);
821
822
823 typedef void (*efi_element_handler_t)(const char *source,
824 const void *element_data,
825 size_t element_size);
826 extern int __init parse_efi_signature_list(
827 const char *source,
828 const void *data, size_t size,
829 efi_element_handler_t (*get_handler_for_guid)(const efi_guid_t *));
830
831 /**
832 * efi_range_is_wc - check the WC bit on an address range
833 * @start: starting kvirt address
834 * @len: length of range
835 *
836 * Consult the EFI memory map and make sure it's ok to set this range WC.
837 * Returns true or false.
838 */
efi_range_is_wc(unsigned long start,unsigned long len)839 static inline int efi_range_is_wc(unsigned long start, unsigned long len)
840 {
841 unsigned long i;
842
843 for (i = 0; i < len; i += (1UL << EFI_PAGE_SHIFT)) {
844 unsigned long paddr = __pa(start + i);
845 if (!(efi_mem_attributes(paddr) & EFI_MEMORY_WC))
846 return 0;
847 }
848 /* The range checked out */
849 return 1;
850 }
851
852 /*
853 * We play games with efi_enabled so that the compiler will, if
854 * possible, remove EFI-related code altogether.
855 */
856 #define EFI_BOOT 0 /* Were we booted from EFI? */
857 #define EFI_CONFIG_TABLES 2 /* Can we use EFI config tables? */
858 #define EFI_RUNTIME_SERVICES 3 /* Can we use runtime services? */
859 #define EFI_MEMMAP 4 /* Can we use EFI memory map? */
860 #define EFI_64BIT 5 /* Is the firmware 64-bit? */
861 #define EFI_PARAVIRT 6 /* Access is via a paravirt interface */
862 #define EFI_ARCH_1 7 /* First arch-specific bit */
863 #define EFI_DBG 8 /* Print additional debug info at runtime */
864 #define EFI_NX_PE_DATA 9 /* Can runtime data regions be mapped non-executable? */
865 #define EFI_MEM_ATTR 10 /* Did firmware publish an EFI_MEMORY_ATTRIBUTES table? */
866 #define EFI_MEM_NO_SOFT_RESERVE 11 /* Is the kernel configured to ignore soft reservations? */
867 #define EFI_PRESERVE_BS_REGIONS 12 /* Are EFI boot-services memory segments available? */
868
869 #ifdef CONFIG_EFI
870 /*
871 * Test whether the above EFI_* bits are enabled.
872 */
efi_enabled(int feature)873 static inline bool efi_enabled(int feature)
874 {
875 return test_bit(feature, &efi.flags) != 0;
876 }
877 extern void efi_reboot(enum reboot_mode reboot_mode, const char *__unused);
878
879 bool __pure __efi_soft_reserve_enabled(void);
880
efi_soft_reserve_enabled(void)881 static inline bool __pure efi_soft_reserve_enabled(void)
882 {
883 return IS_ENABLED(CONFIG_EFI_SOFT_RESERVE)
884 && __efi_soft_reserve_enabled();
885 }
886
efi_rt_services_supported(unsigned int mask)887 static inline bool efi_rt_services_supported(unsigned int mask)
888 {
889 return (efi.runtime_supported_mask & mask) == mask;
890 }
891 extern void efi_find_mirror(void);
892 #else
efi_enabled(int feature)893 static inline bool efi_enabled(int feature)
894 {
895 return false;
896 }
897 static inline void
efi_reboot(enum reboot_mode reboot_mode,const char * __unused)898 efi_reboot(enum reboot_mode reboot_mode, const char *__unused) {}
899
efi_soft_reserve_enabled(void)900 static inline bool efi_soft_reserve_enabled(void)
901 {
902 return false;
903 }
904
efi_rt_services_supported(unsigned int mask)905 static inline bool efi_rt_services_supported(unsigned int mask)
906 {
907 return false;
908 }
909
efi_find_mirror(void)910 static inline void efi_find_mirror(void) {}
911 #endif
912
913 extern int efi_status_to_err(efi_status_t status);
914
915 /*
916 * Variable Attributes
917 */
918 #define EFI_VARIABLE_NON_VOLATILE 0x0000000000000001
919 #define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
920 #define EFI_VARIABLE_RUNTIME_ACCESS 0x0000000000000004
921 #define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008
922 #define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010
923 #define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020
924 #define EFI_VARIABLE_APPEND_WRITE 0x0000000000000040
925
926 #define EFI_VARIABLE_MASK (EFI_VARIABLE_NON_VOLATILE | \
927 EFI_VARIABLE_BOOTSERVICE_ACCESS | \
928 EFI_VARIABLE_RUNTIME_ACCESS | \
929 EFI_VARIABLE_HARDWARE_ERROR_RECORD | \
930 EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \
931 EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \
932 EFI_VARIABLE_APPEND_WRITE)
933 /*
934 * Length of a GUID string (strlen("aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee"))
935 * not including trailing NUL
936 */
937 #define EFI_VARIABLE_GUID_LEN UUID_STRING_LEN
938
939 /*
940 * EFI Device Path information
941 */
942 #define EFI_DEV_HW 0x01
943 #define EFI_DEV_PCI 1
944 #define EFI_DEV_PCCARD 2
945 #define EFI_DEV_MEM_MAPPED 3
946 #define EFI_DEV_VENDOR 4
947 #define EFI_DEV_CONTROLLER 5
948 #define EFI_DEV_ACPI 0x02
949 #define EFI_DEV_BASIC_ACPI 1
950 #define EFI_DEV_EXPANDED_ACPI 2
951 #define EFI_DEV_MSG 0x03
952 #define EFI_DEV_MSG_ATAPI 1
953 #define EFI_DEV_MSG_SCSI 2
954 #define EFI_DEV_MSG_FC 3
955 #define EFI_DEV_MSG_1394 4
956 #define EFI_DEV_MSG_USB 5
957 #define EFI_DEV_MSG_USB_CLASS 15
958 #define EFI_DEV_MSG_I20 6
959 #define EFI_DEV_MSG_MAC 11
960 #define EFI_DEV_MSG_IPV4 12
961 #define EFI_DEV_MSG_IPV6 13
962 #define EFI_DEV_MSG_INFINIBAND 9
963 #define EFI_DEV_MSG_UART 14
964 #define EFI_DEV_MSG_VENDOR 10
965 #define EFI_DEV_MEDIA 0x04
966 #define EFI_DEV_MEDIA_HARD_DRIVE 1
967 #define EFI_DEV_MEDIA_CDROM 2
968 #define EFI_DEV_MEDIA_VENDOR 3
969 #define EFI_DEV_MEDIA_FILE 4
970 #define EFI_DEV_MEDIA_PROTOCOL 5
971 #define EFI_DEV_MEDIA_REL_OFFSET 8
972 #define EFI_DEV_BIOS_BOOT 0x05
973 #define EFI_DEV_END_PATH 0x7F
974 #define EFI_DEV_END_PATH2 0xFF
975 #define EFI_DEV_END_INSTANCE 0x01
976 #define EFI_DEV_END_ENTIRE 0xFF
977
978 struct efi_generic_dev_path {
979 u8 type;
980 u8 sub_type;
981 u16 length;
982 } __packed;
983
984 struct efi_acpi_dev_path {
985 struct efi_generic_dev_path header;
986 u32 hid;
987 u32 uid;
988 } __packed;
989
990 struct efi_pci_dev_path {
991 struct efi_generic_dev_path header;
992 u8 fn;
993 u8 dev;
994 } __packed;
995
996 struct efi_vendor_dev_path {
997 struct efi_generic_dev_path header;
998 efi_guid_t vendorguid;
999 u8 vendordata[];
1000 } __packed;
1001
1002 struct efi_rel_offset_dev_path {
1003 struct efi_generic_dev_path header;
1004 u32 reserved;
1005 u64 starting_offset;
1006 u64 ending_offset;
1007 } __packed;
1008
1009 struct efi_mem_mapped_dev_path {
1010 struct efi_generic_dev_path header;
1011 u32 memory_type;
1012 u64 starting_addr;
1013 u64 ending_addr;
1014 } __packed;
1015
1016 struct efi_file_path_dev_path {
1017 struct efi_generic_dev_path header;
1018 efi_char16_t filename[];
1019 } __packed;
1020
1021 struct efi_dev_path {
1022 union {
1023 struct efi_generic_dev_path header;
1024 struct efi_acpi_dev_path acpi;
1025 struct efi_pci_dev_path pci;
1026 struct efi_vendor_dev_path vendor;
1027 struct efi_rel_offset_dev_path rel_offset;
1028 };
1029 } __packed;
1030
1031 struct device *efi_get_device_by_path(const struct efi_dev_path **node,
1032 size_t *len);
1033
memrange_efi_to_native(u64 * addr,u64 * npages)1034 static inline void memrange_efi_to_native(u64 *addr, u64 *npages)
1035 {
1036 *npages = PFN_UP(*addr + (*npages<<EFI_PAGE_SHIFT)) - PFN_DOWN(*addr);
1037 *addr &= PAGE_MASK;
1038 }
1039
1040 /*
1041 * EFI Variable support.
1042 *
1043 * Different firmware drivers can expose their EFI-like variables using
1044 * the following.
1045 */
1046
1047 struct efivar_operations {
1048 efi_get_variable_t *get_variable;
1049 efi_get_next_variable_t *get_next_variable;
1050 efi_set_variable_t *set_variable;
1051 efi_set_variable_t *set_variable_nonblocking;
1052 efi_query_variable_store_t *query_variable_store;
1053 efi_query_variable_info_t *query_variable_info;
1054 };
1055
1056 struct efivars {
1057 struct kset *kset;
1058 const struct efivar_operations *ops;
1059 };
1060
1061 #ifdef CONFIG_X86
1062 u64 __attribute_const__ efivar_reserved_space(void);
1063 #else
efivar_reserved_space(void)1064 static inline u64 efivar_reserved_space(void) { return 0; }
1065 #endif
1066
1067 /*
1068 * The maximum size of VariableName + Data = 1024
1069 * Therefore, it's reasonable to save that much
1070 * space in each part of the structure,
1071 * and we use a page for reading/writing.
1072 */
1073
1074 #define EFI_VAR_NAME_LEN 1024
1075
1076 int efivars_register(struct efivars *efivars,
1077 const struct efivar_operations *ops);
1078 int efivars_unregister(struct efivars *efivars);
1079
1080 #ifdef CONFIG_EFI
1081 bool efivar_is_available(void);
1082 #else
efivar_is_available(void)1083 static inline bool efivar_is_available(void) { return false; }
1084 #endif
1085
1086 bool efivar_supports_writes(void);
1087
1088 int efivar_lock(void);
1089 int efivar_trylock(void);
1090 void efivar_unlock(void);
1091
1092 efi_status_t efivar_get_variable(efi_char16_t *name, efi_guid_t *vendor,
1093 u32 *attr, unsigned long *size, void *data);
1094
1095 efi_status_t efivar_get_next_variable(unsigned long *name_size,
1096 efi_char16_t *name, efi_guid_t *vendor);
1097
1098 efi_status_t efivar_set_variable_locked(efi_char16_t *name, efi_guid_t *vendor,
1099 u32 attr, unsigned long data_size,
1100 void *data, bool nonblocking);
1101
1102 efi_status_t efivar_set_variable(efi_char16_t *name, efi_guid_t *vendor,
1103 u32 attr, unsigned long data_size, void *data);
1104
1105 efi_status_t efivar_query_variable_info(u32 attr, u64 *storage_space,
1106 u64 *remaining_space,
1107 u64 *max_variable_size);
1108
1109 #if IS_ENABLED(CONFIG_EFI_CAPSULE_LOADER)
1110 extern bool efi_capsule_pending(int *reset_type);
1111
1112 extern int efi_capsule_supported(efi_guid_t guid, u32 flags,
1113 size_t size, int *reset);
1114
1115 extern int efi_capsule_update(efi_capsule_header_t *capsule,
1116 phys_addr_t *pages);
1117 #else
efi_capsule_pending(int * reset_type)1118 static inline bool efi_capsule_pending(int *reset_type) { return false; }
1119 #endif
1120
1121 #ifdef CONFIG_EFI
1122 extern bool efi_runtime_disabled(void);
1123 #else
efi_runtime_disabled(void)1124 static inline bool efi_runtime_disabled(void) { return true; }
1125 #endif
1126
1127 extern void efi_call_virt_check_flags(unsigned long flags, const void *caller);
1128 extern unsigned long efi_call_virt_save_flags(void);
1129
1130 enum efi_secureboot_mode {
1131 efi_secureboot_mode_unset,
1132 efi_secureboot_mode_unknown,
1133 efi_secureboot_mode_disabled,
1134 efi_secureboot_mode_enabled,
1135 };
1136
1137 static inline
efi_get_secureboot_mode(efi_get_variable_t * get_var)1138 enum efi_secureboot_mode efi_get_secureboot_mode(efi_get_variable_t *get_var)
1139 {
1140 u8 secboot, setupmode = 0;
1141 efi_status_t status;
1142 unsigned long size;
1143
1144 size = sizeof(secboot);
1145 status = get_var(L"SecureBoot", &EFI_GLOBAL_VARIABLE_GUID, NULL, &size,
1146 &secboot);
1147 if (status == EFI_NOT_FOUND)
1148 return efi_secureboot_mode_disabled;
1149 if (status != EFI_SUCCESS)
1150 return efi_secureboot_mode_unknown;
1151
1152 size = sizeof(setupmode);
1153 get_var(L"SetupMode", &EFI_GLOBAL_VARIABLE_GUID, NULL, &size, &setupmode);
1154 if (secboot == 0 || setupmode == 1)
1155 return efi_secureboot_mode_disabled;
1156 return efi_secureboot_mode_enabled;
1157 }
1158
1159 #ifdef CONFIG_EFI_EMBEDDED_FIRMWARE
1160 void efi_check_for_embedded_firmwares(void);
1161 #else
efi_check_for_embedded_firmwares(void)1162 static inline void efi_check_for_embedded_firmwares(void) { }
1163 #endif
1164
1165 #define arch_efi_call_virt(p, f, args...) ((p)->f(args))
1166
1167 /*
1168 * Arch code must implement the following three routines:
1169 *
1170 * * arch_efi_call_virt_setup()
1171 *
1172 * Sets up the environment for the call (e.g. switching page tables,
1173 * allowing kernel-mode use of floating point, if required).
1174 *
1175 * * arch_efi_call_virt()
1176 *
1177 * Performs the call. This routine takes a variable number of arguments so
1178 * it must be implemented as a variadic preprocessor macro.
1179 *
1180 * * arch_efi_call_virt_teardown()
1181 *
1182 * Restores the usual kernel environment once the call has returned.
1183 */
1184
1185 #define efi_call_virt_pointer(p, f, args...) \
1186 ({ \
1187 typeof((p)->f(args)) __s; \
1188 unsigned long __flags; \
1189 \
1190 arch_efi_call_virt_setup(); \
1191 \
1192 __flags = efi_call_virt_save_flags(); \
1193 __s = arch_efi_call_virt(p, f, args); \
1194 efi_call_virt_check_flags(__flags, NULL); \
1195 \
1196 arch_efi_call_virt_teardown(); \
1197 \
1198 __s; \
1199 })
1200
1201 #define EFI_RANDOM_SEED_SIZE 32U // BLAKE2S_HASH_SIZE
1202
1203 struct linux_efi_random_seed {
1204 u32 size;
1205 u8 bits[];
1206 };
1207
1208 struct linux_efi_tpm_eventlog {
1209 u32 size;
1210 u32 final_events_preboot_size;
1211 u8 version;
1212 u8 log[];
1213 };
1214
1215 extern int efi_tpm_eventlog_init(void);
1216
1217 struct efi_tcg2_final_events_table {
1218 u64 version;
1219 u64 nr_events;
1220 u8 events[];
1221 };
1222 extern int efi_tpm_final_log_size;
1223
1224 extern unsigned long rci2_table_phys;
1225
1226 efi_status_t
1227 efi_call_acpi_prm_handler(efi_status_t (__efiapi *handler_addr)(u64, void *),
1228 u64 param_buffer_addr, void *context);
1229
1230 /*
1231 * efi_runtime_service() function identifiers.
1232 * "NONE" is used by efi_recover_from_page_fault() to check if the page
1233 * fault happened while executing an efi runtime service.
1234 */
1235 enum efi_rts_ids {
1236 EFI_NONE,
1237 EFI_GET_TIME,
1238 EFI_SET_TIME,
1239 EFI_GET_WAKEUP_TIME,
1240 EFI_SET_WAKEUP_TIME,
1241 EFI_GET_VARIABLE,
1242 EFI_GET_NEXT_VARIABLE,
1243 EFI_SET_VARIABLE,
1244 EFI_QUERY_VARIABLE_INFO,
1245 EFI_GET_NEXT_HIGH_MONO_COUNT,
1246 EFI_RESET_SYSTEM,
1247 EFI_UPDATE_CAPSULE,
1248 EFI_QUERY_CAPSULE_CAPS,
1249 EFI_ACPI_PRM_HANDLER,
1250 };
1251
1252 union efi_rts_args;
1253
1254 /*
1255 * efi_runtime_work: Details of EFI Runtime Service work
1256 * @args: Pointer to union describing the arguments
1257 * @status: Status of executing EFI Runtime Service
1258 * @efi_rts_id: EFI Runtime Service function identifier
1259 * @efi_rts_comp: Struct used for handling completions
1260 * @caller: The caller of the runtime service
1261 */
1262 struct efi_runtime_work {
1263 union efi_rts_args *args;
1264 efi_status_t status;
1265 struct work_struct work;
1266 enum efi_rts_ids efi_rts_id;
1267 struct completion efi_rts_comp;
1268 const void *caller;
1269 };
1270
1271 extern struct efi_runtime_work efi_rts_work;
1272
1273 /* Workqueue to queue EFI Runtime Services */
1274 extern struct workqueue_struct *efi_rts_wq;
1275
1276 struct linux_efi_memreserve {
1277 int size; // allocated size of the array
1278 atomic_t count; // number of entries used
1279 phys_addr_t next; // pa of next struct instance
1280 struct {
1281 phys_addr_t base;
1282 phys_addr_t size;
1283 } entry[];
1284 };
1285
1286 #define EFI_MEMRESERVE_COUNT(size) (((size) - sizeof(struct linux_efi_memreserve)) \
1287 / sizeof_field(struct linux_efi_memreserve, entry[0]))
1288
1289 void __init efi_arch_mem_reserve(phys_addr_t addr, u64 size);
1290
1291 char *efi_systab_show_arch(char *str);
1292
1293 /*
1294 * The LINUX_EFI_MOK_VARIABLE_TABLE_GUID config table can be provided
1295 * to the kernel by an EFI boot loader. The table contains a packed
1296 * sequence of these entries, one for each named MOK variable.
1297 * The sequence is terminated by an entry with a completely NULL
1298 * name and 0 data size.
1299 */
1300 struct efi_mokvar_table_entry {
1301 char name[256];
1302 u64 data_size;
1303 u8 data[];
1304 } __attribute((packed));
1305
1306 #ifdef CONFIG_LOAD_UEFI_KEYS
1307 extern void __init efi_mokvar_table_init(void);
1308 extern struct efi_mokvar_table_entry *efi_mokvar_entry_next(
1309 struct efi_mokvar_table_entry **mokvar_entry);
1310 extern struct efi_mokvar_table_entry *efi_mokvar_entry_find(const char *name);
1311 #else
efi_mokvar_table_init(void)1312 static inline void efi_mokvar_table_init(void) { }
efi_mokvar_entry_next(struct efi_mokvar_table_entry ** mokvar_entry)1313 static inline struct efi_mokvar_table_entry *efi_mokvar_entry_next(
1314 struct efi_mokvar_table_entry **mokvar_entry)
1315 {
1316 return NULL;
1317 }
efi_mokvar_entry_find(const char * name)1318 static inline struct efi_mokvar_table_entry *efi_mokvar_entry_find(
1319 const char *name)
1320 {
1321 return NULL;
1322 }
1323 #endif
1324
1325 extern void efifb_setup_from_dmi(struct screen_info *si, const char *opt);
1326
1327 struct linux_efi_coco_secret_area {
1328 u64 base_pa;
1329 u64 size;
1330 };
1331
1332 struct linux_efi_initrd {
1333 unsigned long base;
1334 unsigned long size;
1335 };
1336
1337 /* Header of a populated EFI secret area */
1338 #define EFI_SECRET_TABLE_HEADER_GUID EFI_GUID(0x1e74f542, 0x71dd, 0x4d66, 0x96, 0x3e, 0xef, 0x42, 0x87, 0xff, 0x17, 0x3b)
1339
1340 bool xen_efi_config_table_is_usable(const efi_guid_t *guid, unsigned long table);
1341
1342 static inline
efi_config_table_is_usable(const efi_guid_t * guid,unsigned long table)1343 bool efi_config_table_is_usable(const efi_guid_t *guid, unsigned long table)
1344 {
1345 if (!IS_ENABLED(CONFIG_XEN_EFI))
1346 return true;
1347 return xen_efi_config_table_is_usable(guid, table);
1348 }
1349
1350 umode_t efi_attr_is_visible(struct kobject *kobj, struct attribute *attr, int n);
1351
1352 /*
1353 * efivar ops event type
1354 */
1355 #define EFIVAR_OPS_RDONLY 0
1356 #define EFIVAR_OPS_RDWR 1
1357
1358 extern struct blocking_notifier_head efivar_ops_nh;
1359
1360 void efivars_generic_ops_register(void);
1361 void efivars_generic_ops_unregister(void);
1362
1363 #endif /* _LINUX_EFI_H */
1364