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_TIMEOUT (18 | (1UL << (BITS_PER_LONG-1)))
44 #define EFI_ABORTED (21 | (1UL << (BITS_PER_LONG-1)))
45 #define EFI_SECURITY_VIOLATION (26 | (1UL << (BITS_PER_LONG-1)))
46
47 typedef unsigned long efi_status_t;
48 typedef u8 efi_bool_t;
49 typedef u16 efi_char16_t; /* UNICODE character */
50 typedef u64 efi_physical_addr_t;
51 typedef void *efi_handle_t;
52
53 #if defined(CONFIG_X86_64)
54 #define __efiapi __attribute__((ms_abi))
55 #elif defined(CONFIG_X86_32)
56 #define __efiapi __attribute__((regparm(0)))
57 #else
58 #define __efiapi
59 #endif
60
61 /*
62 * The UEFI spec and EDK2 reference implementation both define EFI_GUID as
63 * struct { u32 a; u16; b; u16 c; u8 d[8]; }; and so the implied alignment
64 * is 32 bits not 8 bits like our guid_t. In some cases (i.e., on 32-bit ARM),
65 * this means that firmware services invoked by the kernel may assume that
66 * efi_guid_t* arguments are 32-bit aligned, and use memory accessors that
67 * do not tolerate misalignment. So let's set the minimum alignment to 32 bits.
68 *
69 * Note that the UEFI spec as well as some comments in the EDK2 code base
70 * suggest that EFI_GUID should be 64-bit aligned, but this appears to be
71 * a mistake, given that no code seems to exist that actually enforces that
72 * or relies on it.
73 */
74 typedef guid_t efi_guid_t __aligned(__alignof__(u32));
75
76 #define EFI_GUID(a, b, c, d...) (efi_guid_t){ { \
77 (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \
78 (b) & 0xff, ((b) >> 8) & 0xff, \
79 (c) & 0xff, ((c) >> 8) & 0xff, d } }
80
81 /*
82 * Generic EFI table header
83 */
84 typedef struct {
85 u64 signature;
86 u32 revision;
87 u32 headersize;
88 u32 crc32;
89 u32 reserved;
90 } efi_table_hdr_t;
91
92 /*
93 * Memory map descriptor:
94 */
95
96 /* Memory types: */
97 #define EFI_RESERVED_TYPE 0
98 #define EFI_LOADER_CODE 1
99 #define EFI_LOADER_DATA 2
100 #define EFI_BOOT_SERVICES_CODE 3
101 #define EFI_BOOT_SERVICES_DATA 4
102 #define EFI_RUNTIME_SERVICES_CODE 5
103 #define EFI_RUNTIME_SERVICES_DATA 6
104 #define EFI_CONVENTIONAL_MEMORY 7
105 #define EFI_UNUSABLE_MEMORY 8
106 #define EFI_ACPI_RECLAIM_MEMORY 9
107 #define EFI_ACPI_MEMORY_NVS 10
108 #define EFI_MEMORY_MAPPED_IO 11
109 #define EFI_MEMORY_MAPPED_IO_PORT_SPACE 12
110 #define EFI_PAL_CODE 13
111 #define EFI_PERSISTENT_MEMORY 14
112 #define EFI_UNACCEPTED_MEMORY 15
113 #define EFI_MAX_MEMORY_TYPE 16
114
115 /* Attribute values: */
116 #define EFI_MEMORY_UC ((u64)0x0000000000000001ULL) /* uncached */
117 #define EFI_MEMORY_WC ((u64)0x0000000000000002ULL) /* write-coalescing */
118 #define EFI_MEMORY_WT ((u64)0x0000000000000004ULL) /* write-through */
119 #define EFI_MEMORY_WB ((u64)0x0000000000000008ULL) /* write-back */
120 #define EFI_MEMORY_UCE ((u64)0x0000000000000010ULL) /* uncached, exported */
121 #define EFI_MEMORY_WP ((u64)0x0000000000001000ULL) /* write-protect */
122 #define EFI_MEMORY_RP ((u64)0x0000000000002000ULL) /* read-protect */
123 #define EFI_MEMORY_XP ((u64)0x0000000000004000ULL) /* execute-protect */
124 #define EFI_MEMORY_NV ((u64)0x0000000000008000ULL) /* non-volatile */
125 #define EFI_MEMORY_MORE_RELIABLE \
126 ((u64)0x0000000000010000ULL) /* higher reliability */
127 #define EFI_MEMORY_RO ((u64)0x0000000000020000ULL) /* read-only */
128 #define EFI_MEMORY_SP ((u64)0x0000000000040000ULL) /* soft reserved */
129 #define EFI_MEMORY_CPU_CRYPTO ((u64)0x0000000000080000ULL) /* supports encryption */
130 #define EFI_MEMORY_RUNTIME ((u64)0x8000000000000000ULL) /* range requires runtime mapping */
131 #define EFI_MEMORY_DESCRIPTOR_VERSION 1
132
133 #define EFI_PAGE_SHIFT 12
134 #define EFI_PAGE_SIZE (1UL << EFI_PAGE_SHIFT)
135 #define EFI_PAGES_MAX (U64_MAX >> EFI_PAGE_SHIFT)
136
137 typedef struct {
138 u32 type;
139 u32 pad;
140 u64 phys_addr;
141 u64 virt_addr;
142 u64 num_pages;
143 u64 attribute;
144 } efi_memory_desc_t;
145
146 typedef struct {
147 efi_guid_t guid;
148 u32 headersize;
149 u32 flags;
150 u32 imagesize;
151 } efi_capsule_header_t;
152
153 /* EFI_FIRMWARE_MANAGEMENT_CAPSULE_HEADER */
154 struct efi_manage_capsule_header {
155 u32 ver;
156 u16 emb_drv_cnt;
157 u16 payload_cnt;
158 /*
159 * Variable-size array of the size given by the sum of
160 * emb_drv_cnt and payload_cnt.
161 */
162 u64 offset_list[];
163 } __packed;
164
165 /* EFI_FIRMWARE_MANAGEMENT_CAPSULE_IMAGE_HEADER */
166 struct efi_manage_capsule_image_header {
167 u32 ver;
168 efi_guid_t image_type_id;
169 u8 image_index;
170 u8 reserved_bytes[3];
171 u32 image_size;
172 u32 vendor_code_size;
173 /* hw_ins was introduced in version 2 */
174 u64 hw_ins;
175 /* capsule_support was introduced in version 3 */
176 u64 capsule_support;
177 } __packed;
178
179 /* WIN_CERTIFICATE */
180 struct win_cert {
181 u32 len;
182 u16 rev;
183 u16 cert_type;
184 };
185
186 /* WIN_CERTIFICATE_UEFI_GUID */
187 struct win_cert_uefi_guid {
188 struct win_cert hdr;
189 efi_guid_t cert_type;
190 u8 cert_data[];
191 };
192
193 /* EFI_FIRMWARE_IMAGE_AUTHENTICATION */
194 struct efi_image_auth {
195 u64 mon_count;
196 struct win_cert_uefi_guid auth_info;
197 };
198
199 /*
200 * EFI capsule flags
201 */
202 #define EFI_CAPSULE_PERSIST_ACROSS_RESET 0x00010000
203 #define EFI_CAPSULE_POPULATE_SYSTEM_TABLE 0x00020000
204 #define EFI_CAPSULE_INITIATE_RESET 0x00040000
205
206 struct capsule_info {
207 efi_capsule_header_t header;
208 efi_capsule_header_t *capsule;
209 int reset_type;
210 long index;
211 size_t count;
212 size_t total_size;
213 struct page **pages;
214 phys_addr_t *phys;
215 size_t page_bytes_remain;
216 };
217
218 int efi_capsule_setup_info(struct capsule_info *cap_info, void *kbuff,
219 size_t hdr_bytes);
220 int __efi_capsule_setup_info(struct capsule_info *cap_info);
221
222 /*
223 * Types and defines for Time Services
224 */
225 #define EFI_TIME_ADJUST_DAYLIGHT 0x1
226 #define EFI_TIME_IN_DAYLIGHT 0x2
227 #define EFI_UNSPECIFIED_TIMEZONE 0x07ff
228
229 typedef struct {
230 u16 year;
231 u8 month;
232 u8 day;
233 u8 hour;
234 u8 minute;
235 u8 second;
236 u8 pad1;
237 u32 nanosecond;
238 s16 timezone;
239 u8 daylight;
240 u8 pad2;
241 } efi_time_t;
242
243 typedef struct {
244 u32 resolution;
245 u32 accuracy;
246 u8 sets_to_zero;
247 } efi_time_cap_t;
248
249 typedef union efi_boot_services efi_boot_services_t;
250
251 /*
252 * Types and defines for EFI ResetSystem
253 */
254 #define EFI_RESET_COLD 0
255 #define EFI_RESET_WARM 1
256 #define EFI_RESET_SHUTDOWN 2
257
258 /*
259 * EFI Runtime Services table
260 */
261 #define EFI_RUNTIME_SERVICES_SIGNATURE ((u64)0x5652453544e5552ULL)
262 #define EFI_RUNTIME_SERVICES_REVISION 0x00010000
263
264 typedef struct {
265 efi_table_hdr_t hdr;
266 u32 get_time;
267 u32 set_time;
268 u32 get_wakeup_time;
269 u32 set_wakeup_time;
270 u32 set_virtual_address_map;
271 u32 convert_pointer;
272 u32 get_variable;
273 u32 get_next_variable;
274 u32 set_variable;
275 u32 get_next_high_mono_count;
276 u32 reset_system;
277 u32 update_capsule;
278 u32 query_capsule_caps;
279 u32 query_variable_info;
280 } efi_runtime_services_32_t;
281
282 typedef efi_status_t efi_get_time_t (efi_time_t *tm, efi_time_cap_t *tc);
283 typedef efi_status_t efi_set_time_t (efi_time_t *tm);
284 typedef efi_status_t efi_get_wakeup_time_t (efi_bool_t *enabled, efi_bool_t *pending,
285 efi_time_t *tm);
286 typedef efi_status_t efi_set_wakeup_time_t (efi_bool_t enabled, efi_time_t *tm);
287 typedef efi_status_t efi_get_variable_t (efi_char16_t *name, efi_guid_t *vendor, u32 *attr,
288 unsigned long *data_size, void *data);
289 typedef efi_status_t efi_get_next_variable_t (unsigned long *name_size, efi_char16_t *name,
290 efi_guid_t *vendor);
291 typedef efi_status_t efi_set_variable_t (efi_char16_t *name, efi_guid_t *vendor,
292 u32 attr, unsigned long data_size,
293 void *data);
294 typedef efi_status_t efi_get_next_high_mono_count_t (u32 *count);
295 typedef void efi_reset_system_t (int reset_type, efi_status_t status,
296 unsigned long data_size, efi_char16_t *data);
297 typedef efi_status_t efi_set_virtual_address_map_t (unsigned long memory_map_size,
298 unsigned long descriptor_size,
299 u32 descriptor_version,
300 efi_memory_desc_t *virtual_map);
301 typedef efi_status_t efi_query_variable_info_t(u32 attr,
302 u64 *storage_space,
303 u64 *remaining_space,
304 u64 *max_variable_size);
305 typedef efi_status_t efi_update_capsule_t(efi_capsule_header_t **capsules,
306 unsigned long count,
307 unsigned long sg_list);
308 typedef efi_status_t efi_query_capsule_caps_t(efi_capsule_header_t **capsules,
309 unsigned long count,
310 u64 *max_size,
311 int *reset_type);
312 typedef efi_status_t efi_query_variable_store_t(u32 attributes,
313 unsigned long size,
314 bool nonblocking);
315
316 typedef union {
317 struct {
318 efi_table_hdr_t hdr;
319 efi_get_time_t __efiapi *get_time;
320 efi_set_time_t __efiapi *set_time;
321 efi_get_wakeup_time_t __efiapi *get_wakeup_time;
322 efi_set_wakeup_time_t __efiapi *set_wakeup_time;
323 efi_set_virtual_address_map_t __efiapi *set_virtual_address_map;
324 void *convert_pointer;
325 efi_get_variable_t __efiapi *get_variable;
326 efi_get_next_variable_t __efiapi *get_next_variable;
327 efi_set_variable_t __efiapi *set_variable;
328 efi_get_next_high_mono_count_t __efiapi *get_next_high_mono_count;
329 efi_reset_system_t __efiapi *reset_system;
330 efi_update_capsule_t __efiapi *update_capsule;
331 efi_query_capsule_caps_t __efiapi *query_capsule_caps;
332 efi_query_variable_info_t __efiapi *query_variable_info;
333 };
334 efi_runtime_services_32_t mixed_mode;
335 } efi_runtime_services_t;
336
337 void efi_native_runtime_setup(void);
338
339 /*
340 * EFI Configuration Table and GUID definitions
341 *
342 * These are all defined in a single line to make them easier to
343 * grep for and to see them at a glance - while still having a
344 * similar structure to the definitions in the spec.
345 *
346 * Here's how they are structured:
347 *
348 * GUID: 12345678-1234-1234-1234-123456789012
349 * Spec:
350 * #define EFI_SOME_PROTOCOL_GUID \
351 * {0x12345678,0x1234,0x1234,\
352 * {0x12,0x34,0x12,0x34,0x56,0x78,0x90,0x12}}
353 * Here:
354 * #define SOME_PROTOCOL_GUID EFI_GUID(0x12345678, 0x1234, 0x1234, 0x12, 0x34, 0x12, 0x34, 0x56, 0x78, 0x90, 0x12)
355 * ^ tabs ^extra space
356 *
357 * Note that the 'extra space' separates the values at the same place
358 * where the UEFI SPEC breaks the line.
359 */
360 #define NULL_GUID EFI_GUID(0x00000000, 0x0000, 0x0000, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00)
361 #define MPS_TABLE_GUID EFI_GUID(0xeb9d2d2f, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
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 SAL_SYSTEM_TABLE_GUID EFI_GUID(0xeb9d2d32, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
367 #define HCDP_TABLE_GUID EFI_GUID(0xf951938d, 0x620b, 0x42ef, 0x82, 0x79, 0xa8, 0x4b, 0x79, 0x61, 0x78, 0x98)
368 #define UGA_IO_PROTOCOL_GUID EFI_GUID(0x61a4d49e, 0x6f68, 0x4f1b, 0xb9, 0x22, 0xa8, 0x6e, 0xed, 0x0b, 0x07, 0xa2)
369 #define EFI_GLOBAL_VARIABLE_GUID EFI_GUID(0x8be4df61, 0x93ca, 0x11d2, 0xaa, 0x0d, 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c)
370 #define UV_SYSTEM_TABLE_GUID EFI_GUID(0x3b13a7d4, 0x633e, 0x11dd, 0x93, 0xec, 0xda, 0x25, 0x56, 0xd8, 0x95, 0x93)
371 #define LINUX_EFI_CRASH_GUID EFI_GUID(0xcfc8fc79, 0xbe2e, 0x4ddc, 0x97, 0xf0, 0x9f, 0x98, 0xbf, 0xe2, 0x98, 0xa0)
372 #define LOADED_IMAGE_PROTOCOL_GUID EFI_GUID(0x5b1b31a1, 0x9562, 0x11d2, 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
373 #define LOADED_IMAGE_DEVICE_PATH_PROTOCOL_GUID EFI_GUID(0xbc62157e, 0x3e33, 0x4fec, 0x99, 0x20, 0x2d, 0x3b, 0x36, 0xd7, 0x50, 0xdf)
374 #define EFI_DEVICE_PATH_PROTOCOL_GUID EFI_GUID(0x09576e91, 0x6d3f, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
375 #define EFI_DEVICE_PATH_TO_TEXT_PROTOCOL_GUID EFI_GUID(0x8b843e20, 0x8132, 0x4852, 0x90, 0xcc, 0x55, 0x1a, 0x4e, 0x4a, 0x7f, 0x1c)
376 #define EFI_DEVICE_PATH_FROM_TEXT_PROTOCOL_GUID EFI_GUID(0x05c99a21, 0xc70f, 0x4ad2, 0x8a, 0x5f, 0x35, 0xdf, 0x33, 0x43, 0xf5, 0x1e)
377 #define EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID EFI_GUID(0x9042a9de, 0x23dc, 0x4a38, 0x96, 0xfb, 0x7a, 0xde, 0xd0, 0x80, 0x51, 0x6a)
378 #define EFI_UGA_PROTOCOL_GUID EFI_GUID(0x982c298b, 0xf4fa, 0x41cb, 0xb8, 0x38, 0x77, 0xaa, 0x68, 0x8f, 0xb8, 0x39)
379 #define EFI_PCI_IO_PROTOCOL_GUID EFI_GUID(0x4cf5b200, 0x68b8, 0x4ca5, 0x9e, 0xec, 0xb2, 0x3e, 0x3f, 0x50, 0x02, 0x9a)
380 #define EFI_FILE_INFO_ID EFI_GUID(0x09576e92, 0x6d3f, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
381 #define EFI_SYSTEM_RESOURCE_TABLE_GUID EFI_GUID(0xb122a263, 0x3661, 0x4f68, 0x99, 0x29, 0x78, 0xf8, 0xb0, 0xd6, 0x21, 0x80)
382 #define EFI_FILE_SYSTEM_GUID EFI_GUID(0x964e5b22, 0x6459, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
383 #define DEVICE_TREE_GUID EFI_GUID(0xb1b621d5, 0xf19c, 0x41a5, 0x83, 0x0b, 0xd9, 0x15, 0x2c, 0x69, 0xaa, 0xe0)
384 #define EFI_PROPERTIES_TABLE_GUID EFI_GUID(0x880aaca3, 0x4adc, 0x4a04, 0x90, 0x79, 0xb7, 0x47, 0x34, 0x08, 0x25, 0xe5)
385 #define EFI_RNG_PROTOCOL_GUID EFI_GUID(0x3152bca5, 0xeade, 0x433d, 0x86, 0x2e, 0xc0, 0x1c, 0xdc, 0x29, 0x1f, 0x44)
386 #define EFI_RNG_ALGORITHM_RAW EFI_GUID(0xe43176d7, 0xb6e8, 0x4827, 0xb7, 0x84, 0x7f, 0xfd, 0xc4, 0xb6, 0x85, 0x61)
387 #define EFI_MEMORY_ATTRIBUTES_TABLE_GUID EFI_GUID(0xdcfa911d, 0x26eb, 0x469f, 0xa2, 0x20, 0x38, 0xb7, 0xdc, 0x46, 0x12, 0x20)
388 #define EFI_CONSOLE_OUT_DEVICE_GUID EFI_GUID(0xd3b36f2c, 0xd551, 0x11d4, 0x9a, 0x46, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
389 #define APPLE_PROPERTIES_PROTOCOL_GUID EFI_GUID(0x91bd12fe, 0xf6c3, 0x44fb, 0xa5, 0xb7, 0x51, 0x22, 0xab, 0x30, 0x3a, 0xe0)
390 #define EFI_TCG2_PROTOCOL_GUID EFI_GUID(0x607f766c, 0x7455, 0x42be, 0x93, 0x0b, 0xe4, 0xd7, 0x6d, 0xb2, 0x72, 0x0f)
391 #define EFI_LOAD_FILE_PROTOCOL_GUID EFI_GUID(0x56ec3091, 0x954c, 0x11d2, 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
392 #define EFI_LOAD_FILE2_PROTOCOL_GUID EFI_GUID(0x4006c0c1, 0xfcb3, 0x403e, 0x99, 0x6d, 0x4a, 0x6c, 0x87, 0x24, 0xe0, 0x6d)
393 #define EFI_RT_PROPERTIES_TABLE_GUID EFI_GUID(0xeb66918a, 0x7eef, 0x402a, 0x84, 0x2e, 0x93, 0x1d, 0x21, 0xc3, 0x8a, 0xe9)
394 #define EFI_DXE_SERVICES_TABLE_GUID EFI_GUID(0x05ad34ba, 0x6f02, 0x4214, 0x95, 0x2e, 0x4d, 0xa0, 0x39, 0x8e, 0x2b, 0xb9)
395 #define EFI_SMBIOS_PROTOCOL_GUID EFI_GUID(0x03583ff6, 0xcb36, 0x4940, 0x94, 0x7e, 0xb9, 0xb3, 0x9f, 0x4a, 0xfa, 0xf7)
396 #define EFI_MEMORY_ATTRIBUTE_PROTOCOL_GUID EFI_GUID(0xf4560cf6, 0x40ec, 0x4b4a, 0xa1, 0x92, 0xbf, 0x1d, 0x57, 0xd0, 0xb1, 0x89)
397
398 #define EFI_IMAGE_SECURITY_DATABASE_GUID EFI_GUID(0xd719b2cb, 0x3d3a, 0x4596, 0xa3, 0xbc, 0xda, 0xd0, 0x0e, 0x67, 0x65, 0x6f)
399 #define EFI_SHIM_LOCK_GUID EFI_GUID(0x605dab50, 0xe046, 0x4300, 0xab, 0xb6, 0x3d, 0xd8, 0x10, 0xdd, 0x8b, 0x23)
400
401 #define EFI_CERT_SHA256_GUID EFI_GUID(0xc1c41626, 0x504c, 0x4092, 0xac, 0xa9, 0x41, 0xf9, 0x36, 0x93, 0x43, 0x28)
402 #define EFI_CERT_X509_GUID EFI_GUID(0xa5c059a1, 0x94e4, 0x4aa7, 0x87, 0xb5, 0xab, 0x15, 0x5c, 0x2b, 0xf0, 0x72)
403 #define EFI_CERT_X509_SHA256_GUID EFI_GUID(0x3bd2a492, 0x96c0, 0x4079, 0xb4, 0x20, 0xfc, 0xf9, 0x8e, 0xf1, 0x03, 0xed)
404 #define EFI_CC_BLOB_GUID EFI_GUID(0x067b1f5f, 0xcf26, 0x44c5, 0x85, 0x54, 0x93, 0xd7, 0x77, 0x91, 0x2d, 0x42)
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_TPM_FINAL_LOG_GUID EFI_GUID(0x1e2ed096, 0x30e2, 0x4254, 0xbd, 0x89, 0x86, 0x3b, 0xbe, 0xf8, 0x23, 0x25)
417 #define LINUX_EFI_MEMRESERVE_TABLE_GUID EFI_GUID(0x888eb0c6, 0x8ede, 0x4ff5, 0xa8, 0xf0, 0x9a, 0xee, 0x5c, 0xb9, 0x77, 0xc2)
418 #define LINUX_EFI_INITRD_MEDIA_GUID EFI_GUID(0x5568e427, 0x68fc, 0x4f3d, 0xac, 0x74, 0xca, 0x55, 0x52, 0x31, 0xcc, 0x68)
419 #define LINUX_EFI_MOK_VARIABLE_TABLE_GUID EFI_GUID(0xc451ed2b, 0x9694, 0x45d3, 0xba, 0xba, 0xed, 0x9f, 0x89, 0x88, 0xa3, 0x89)
420 #define LINUX_EFI_COCO_SECRET_AREA_GUID EFI_GUID(0xadf956ad, 0xe98c, 0x484c, 0xae, 0x11, 0xb5, 0x1c, 0x7d, 0x33, 0x64, 0x47)
421 #define LINUX_EFI_BOOT_MEMMAP_GUID EFI_GUID(0x800f683f, 0xd08b, 0x423a, 0xa2, 0x93, 0x96, 0x5c, 0x3c, 0x6f, 0xe2, 0xb4)
422 #define LINUX_EFI_UNACCEPTED_MEM_TABLE_GUID EFI_GUID(0xd5d1de3c, 0x105c, 0x44f9, 0x9e, 0xa9, 0xbc, 0xef, 0x98, 0x12, 0x00, 0x31)
423
424 #define RISCV_EFI_BOOT_PROTOCOL_GUID EFI_GUID(0xccd15fec, 0x6f73, 0x4eec, 0x83, 0x95, 0x3e, 0x69, 0xe4, 0xb9, 0x40, 0xbf)
425
426 /*
427 * This GUID may be installed onto the kernel image's handle as a NULL protocol
428 * to signal to the stub that the placement of the image should be respected,
429 * and moving the image in physical memory is undesirable. To ensure
430 * compatibility with 64k pages kernels with virtually mapped stacks, and to
431 * avoid defeating physical randomization, this protocol should only be
432 * installed if the image was placed at a randomized 128k aligned address in
433 * memory.
434 */
435 #define LINUX_EFI_LOADED_IMAGE_FIXED_GUID EFI_GUID(0xf5a37b6d, 0x3344, 0x42a5, 0xb6, 0xbb, 0x97, 0x86, 0x48, 0xc1, 0x89, 0x0a)
436
437 /* OEM GUIDs */
438 #define DELLEMC_EFI_RCI2_TABLE_GUID EFI_GUID(0x2d9f28a2, 0xa886, 0x456a, 0x97, 0xa8, 0xf1, 0x1e, 0xf2, 0x4f, 0xf4, 0x55)
439 #define AMD_SEV_MEM_ENCRYPT_GUID EFI_GUID(0x0cf29b71, 0x9e51, 0x433a, 0xa3, 0xb7, 0x81, 0xf3, 0xab, 0x16, 0xb8, 0x75)
440
441 /* OVMF protocol GUIDs */
442 #define OVMF_SEV_MEMORY_ACCEPTANCE_PROTOCOL_GUID EFI_GUID(0xc5a010fe, 0x38a7, 0x4531, 0x8a, 0x4a, 0x05, 0x00, 0xd2, 0xfd, 0x16, 0x49)
443
444 typedef struct {
445 efi_guid_t guid;
446 u64 table;
447 } efi_config_table_64_t;
448
449 typedef struct {
450 efi_guid_t guid;
451 u32 table;
452 } efi_config_table_32_t;
453
454 typedef union {
455 struct {
456 efi_guid_t guid;
457 void *table;
458 };
459 efi_config_table_32_t mixed_mode;
460 } efi_config_table_t;
461
462 typedef struct {
463 efi_guid_t guid;
464 unsigned long *ptr;
465 const char name[16];
466 } efi_config_table_type_t;
467
468 #define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL)
469 #define EFI_DXE_SERVICES_TABLE_SIGNATURE ((u64)0x565245535f455844ULL)
470
471 #define EFI_2_30_SYSTEM_TABLE_REVISION ((2 << 16) | (30))
472 #define EFI_2_20_SYSTEM_TABLE_REVISION ((2 << 16) | (20))
473 #define EFI_2_10_SYSTEM_TABLE_REVISION ((2 << 16) | (10))
474 #define EFI_2_00_SYSTEM_TABLE_REVISION ((2 << 16) | (00))
475 #define EFI_1_10_SYSTEM_TABLE_REVISION ((1 << 16) | (10))
476 #define EFI_1_02_SYSTEM_TABLE_REVISION ((1 << 16) | (02))
477
478 typedef struct {
479 efi_table_hdr_t hdr;
480 u64 fw_vendor; /* physical addr of CHAR16 vendor string */
481 u32 fw_revision;
482 u32 __pad1;
483 u64 con_in_handle;
484 u64 con_in;
485 u64 con_out_handle;
486 u64 con_out;
487 u64 stderr_handle;
488 u64 stderr;
489 u64 runtime;
490 u64 boottime;
491 u32 nr_tables;
492 u32 __pad2;
493 u64 tables;
494 } efi_system_table_64_t;
495
496 typedef struct {
497 efi_table_hdr_t hdr;
498 u32 fw_vendor; /* physical addr of CHAR16 vendor string */
499 u32 fw_revision;
500 u32 con_in_handle;
501 u32 con_in;
502 u32 con_out_handle;
503 u32 con_out;
504 u32 stderr_handle;
505 u32 stderr;
506 u32 runtime;
507 u32 boottime;
508 u32 nr_tables;
509 u32 tables;
510 } efi_system_table_32_t;
511
512 typedef union efi_simple_text_input_protocol efi_simple_text_input_protocol_t;
513 typedef union efi_simple_text_output_protocol efi_simple_text_output_protocol_t;
514
515 typedef union {
516 struct {
517 efi_table_hdr_t hdr;
518 unsigned long fw_vendor; /* physical addr of CHAR16 vendor string */
519 u32 fw_revision;
520 unsigned long con_in_handle;
521 efi_simple_text_input_protocol_t *con_in;
522 unsigned long con_out_handle;
523 efi_simple_text_output_protocol_t *con_out;
524 unsigned long stderr_handle;
525 unsigned long stderr;
526 efi_runtime_services_t *runtime;
527 efi_boot_services_t *boottime;
528 unsigned long nr_tables;
529 unsigned long tables;
530 };
531 efi_system_table_32_t mixed_mode;
532 } efi_system_table_t;
533
534 struct efi_boot_memmap {
535 unsigned long map_size;
536 unsigned long desc_size;
537 u32 desc_ver;
538 unsigned long map_key;
539 unsigned long buff_size;
540 efi_memory_desc_t map[];
541 };
542
543 struct efi_unaccepted_memory {
544 u32 version;
545 u32 unit_size;
546 u64 phys_base;
547 u64 size;
548 unsigned long bitmap[];
549 };
550
551 /*
552 * Architecture independent structure for describing a memory map for the
553 * benefit of efi_memmap_init_early(), and for passing context between
554 * efi_memmap_alloc() and efi_memmap_install().
555 */
556 struct efi_memory_map_data {
557 phys_addr_t phys_map;
558 unsigned long size;
559 unsigned long desc_version;
560 unsigned long desc_size;
561 unsigned long flags;
562 };
563
564 struct efi_memory_map {
565 phys_addr_t phys_map;
566 void *map;
567 void *map_end;
568 int nr_map;
569 unsigned long desc_version;
570 unsigned long desc_size;
571 #define EFI_MEMMAP_LATE (1UL << 0)
572 #define EFI_MEMMAP_MEMBLOCK (1UL << 1)
573 #define EFI_MEMMAP_SLAB (1UL << 2)
574 unsigned long flags;
575 };
576
577 struct efi_mem_range {
578 struct range range;
579 u64 attribute;
580 };
581
582 typedef struct {
583 u32 version;
584 u32 length;
585 u64 memory_protection_attribute;
586 } efi_properties_table_t;
587
588 #define EFI_PROPERTIES_TABLE_VERSION 0x00010000
589 #define EFI_PROPERTIES_RUNTIME_MEMORY_PROTECTION_NON_EXECUTABLE_PE_DATA 0x1
590
591 typedef struct {
592 u16 version;
593 u16 length;
594 u32 runtime_services_supported;
595 } efi_rt_properties_table_t;
596
597 #define EFI_RT_PROPERTIES_TABLE_VERSION 0x1
598
599 #define EFI_INVALID_TABLE_ADDR (~0UL)
600
601 // BIT0 implies that Runtime code includes the forward control flow guard
602 // instruction, such as X86 CET-IBT or ARM BTI.
603 #define EFI_MEMORY_ATTRIBUTES_FLAGS_RT_FORWARD_CONTROL_FLOW_GUARD 0x1
604
605 typedef struct {
606 u32 version;
607 u32 num_entries;
608 u32 desc_size;
609 u32 flags;
610 efi_memory_desc_t entry[0];
611 } efi_memory_attributes_table_t;
612
613 typedef struct {
614 efi_guid_t signature_owner;
615 u8 signature_data[];
616 } efi_signature_data_t;
617
618 typedef struct {
619 efi_guid_t signature_type;
620 u32 signature_list_size;
621 u32 signature_header_size;
622 u32 signature_size;
623 u8 signature_header[];
624 /* efi_signature_data_t signatures[][] */
625 } efi_signature_list_t;
626
627 typedef u8 efi_sha256_hash_t[32];
628
629 typedef struct {
630 efi_sha256_hash_t to_be_signed_hash;
631 efi_time_t time_of_revocation;
632 } efi_cert_x509_sha256_t;
633
634 extern unsigned long __ro_after_init efi_rng_seed; /* RNG Seed table */
635
636 /*
637 * All runtime access to EFI goes through this structure:
638 */
639 extern struct efi {
640 const efi_runtime_services_t *runtime; /* EFI runtime services table */
641 unsigned int runtime_version; /* Runtime services version */
642 unsigned int runtime_supported_mask;
643
644 unsigned long acpi; /* ACPI table (IA64 ext 0.71) */
645 unsigned long acpi20; /* ACPI table (ACPI 2.0) */
646 unsigned long smbios; /* SMBIOS table (32 bit entry point) */
647 unsigned long smbios3; /* SMBIOS table (64 bit entry point) */
648 unsigned long esrt; /* ESRT table */
649 unsigned long tpm_log; /* TPM2 Event Log table */
650 unsigned long tpm_final_log; /* TPM2 Final Events Log table */
651 unsigned long mokvar_table; /* MOK variable config table */
652 unsigned long coco_secret; /* Confidential computing secret table */
653 unsigned long unaccepted; /* Unaccepted memory table */
654
655 efi_get_time_t *get_time;
656 efi_set_time_t *set_time;
657 efi_get_wakeup_time_t *get_wakeup_time;
658 efi_set_wakeup_time_t *set_wakeup_time;
659 efi_get_variable_t *get_variable;
660 efi_get_next_variable_t *get_next_variable;
661 efi_set_variable_t *set_variable;
662 efi_set_variable_t *set_variable_nonblocking;
663 efi_query_variable_info_t *query_variable_info;
664 efi_query_variable_info_t *query_variable_info_nonblocking;
665 efi_update_capsule_t *update_capsule;
666 efi_query_capsule_caps_t *query_capsule_caps;
667 efi_get_next_high_mono_count_t *get_next_high_mono_count;
668 efi_reset_system_t *reset_system;
669
670 struct efi_memory_map memmap;
671 unsigned long flags;
672 } efi;
673
674 #define EFI_RT_SUPPORTED_GET_TIME 0x0001
675 #define EFI_RT_SUPPORTED_SET_TIME 0x0002
676 #define EFI_RT_SUPPORTED_GET_WAKEUP_TIME 0x0004
677 #define EFI_RT_SUPPORTED_SET_WAKEUP_TIME 0x0008
678 #define EFI_RT_SUPPORTED_GET_VARIABLE 0x0010
679 #define EFI_RT_SUPPORTED_GET_NEXT_VARIABLE_NAME 0x0020
680 #define EFI_RT_SUPPORTED_SET_VARIABLE 0x0040
681 #define EFI_RT_SUPPORTED_SET_VIRTUAL_ADDRESS_MAP 0x0080
682 #define EFI_RT_SUPPORTED_CONVERT_POINTER 0x0100
683 #define EFI_RT_SUPPORTED_GET_NEXT_HIGH_MONOTONIC_COUNT 0x0200
684 #define EFI_RT_SUPPORTED_RESET_SYSTEM 0x0400
685 #define EFI_RT_SUPPORTED_UPDATE_CAPSULE 0x0800
686 #define EFI_RT_SUPPORTED_QUERY_CAPSULE_CAPABILITIES 0x1000
687 #define EFI_RT_SUPPORTED_QUERY_VARIABLE_INFO 0x2000
688
689 #define EFI_RT_SUPPORTED_ALL 0x3fff
690
691 #define EFI_RT_SUPPORTED_TIME_SERVICES 0x0003
692 #define EFI_RT_SUPPORTED_WAKEUP_SERVICES 0x000c
693 #define EFI_RT_SUPPORTED_VARIABLE_SERVICES 0x0070
694
695 extern struct mm_struct efi_mm;
696
mm_is_efi(struct mm_struct * mm)697 static inline bool mm_is_efi(struct mm_struct *mm)
698 {
699 return IS_ENABLED(CONFIG_EFI) && mm == &efi_mm;
700 }
701
702 static inline int
efi_guidcmp(efi_guid_t left,efi_guid_t right)703 efi_guidcmp (efi_guid_t left, efi_guid_t right)
704 {
705 return memcmp(&left, &right, sizeof (efi_guid_t));
706 }
707
708 static inline char *
efi_guid_to_str(efi_guid_t * guid,char * out)709 efi_guid_to_str(efi_guid_t *guid, char *out)
710 {
711 sprintf(out, "%pUl", guid->b);
712 return out;
713 }
714
715 extern void efi_init (void);
716 extern void efi_earlycon_reprobe(void);
717 #ifdef CONFIG_EFI
718 extern void efi_enter_virtual_mode (void); /* switch EFI to virtual mode, if possible */
719 #else
efi_enter_virtual_mode(void)720 static inline void efi_enter_virtual_mode (void) {}
721 #endif
722 #ifdef CONFIG_X86
723 extern efi_status_t efi_query_variable_store(u32 attributes,
724 unsigned long size,
725 bool nonblocking);
726 #else
727
efi_query_variable_store(u32 attributes,unsigned long size,bool nonblocking)728 static inline efi_status_t efi_query_variable_store(u32 attributes,
729 unsigned long size,
730 bool nonblocking)
731 {
732 return EFI_SUCCESS;
733 }
734 #endif
735
736 extern int __init __efi_memmap_init(struct efi_memory_map_data *data);
737 extern int __init efi_memmap_init_early(struct efi_memory_map_data *data);
738 extern int __init efi_memmap_init_late(phys_addr_t addr, unsigned long size);
739 extern void __init efi_memmap_unmap(void);
740
741 #ifdef CONFIG_EFI_ESRT
742 extern void __init efi_esrt_init(void);
743 #else
efi_esrt_init(void)744 static inline void efi_esrt_init(void) { }
745 #endif
746 extern int efi_config_parse_tables(const efi_config_table_t *config_tables,
747 int count,
748 const efi_config_table_type_t *arch_tables);
749 extern int efi_systab_check_header(const efi_table_hdr_t *systab_hdr);
750 extern void efi_systab_report_header(const efi_table_hdr_t *systab_hdr,
751 unsigned long fw_vendor);
752 extern u64 efi_get_iobase (void);
753 extern int efi_mem_type(unsigned long phys_addr);
754 extern u64 efi_mem_attributes (unsigned long phys_addr);
755 extern u64 efi_mem_attribute (unsigned long phys_addr, unsigned long size);
756 extern int __init efi_uart_console_only (void);
757 extern u64 efi_mem_desc_end(efi_memory_desc_t *md);
758 extern int efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md);
759 extern int __efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md);
760 extern void efi_mem_reserve(phys_addr_t addr, u64 size);
761 extern int efi_mem_reserve_persistent(phys_addr_t addr, u64 size);
762 extern void efi_initialize_iomem_resources(struct resource *code_resource,
763 struct resource *data_resource, struct resource *bss_resource);
764 extern u64 efi_get_fdt_params(struct efi_memory_map_data *data);
765 extern struct kobject *efi_kobj;
766
767 extern int efi_reboot_quirk_mode;
768 extern bool efi_poweroff_required(void);
769
770 extern unsigned long efi_mem_attr_table;
771
772 /*
773 * efi_memattr_perm_setter - arch specific callback function passed into
774 * efi_memattr_apply_permissions() that updates the
775 * mapping permissions described by the second
776 * argument in the page tables referred to by the
777 * first argument.
778 */
779 typedef int (*efi_memattr_perm_setter)(struct mm_struct *, efi_memory_desc_t *, bool);
780
781 extern int efi_memattr_init(void);
782 extern int efi_memattr_apply_permissions(struct mm_struct *mm,
783 efi_memattr_perm_setter fn);
784
785 /*
786 * efi_early_memdesc_ptr - get the n-th EFI memmap descriptor
787 * @map: the start of efi memmap
788 * @desc_size: the size of space for each EFI memmap descriptor
789 * @n: the index of efi memmap descriptor
790 *
791 * EFI boot service provides the GetMemoryMap() function to get a copy of the
792 * current memory map which is an array of memory descriptors, each of
793 * which describes a contiguous block of memory. It also gets the size of the
794 * map, and the size of each descriptor, etc.
795 *
796 * Note that per section 6.2 of UEFI Spec 2.6 Errata A, the returned size of
797 * each descriptor might not be equal to sizeof(efi_memory_memdesc_t),
798 * since efi_memory_memdesc_t may be extended in the future. Thus the OS
799 * MUST use the returned size of the descriptor to find the start of each
800 * efi_memory_memdesc_t in the memory map array. This should only be used
801 * during bootup since for_each_efi_memory_desc_xxx() is available after the
802 * kernel initializes the EFI subsystem to set up struct efi_memory_map.
803 */
804 #define efi_early_memdesc_ptr(map, desc_size, n) \
805 (efi_memory_desc_t *)((void *)(map) + ((n) * (desc_size)))
806
807 /* Iterate through an efi_memory_map */
808 #define for_each_efi_memory_desc_in_map(m, md) \
809 for ((md) = (m)->map; \
810 (md) && ((void *)(md) + (m)->desc_size) <= (m)->map_end; \
811 (md) = (void *)(md) + (m)->desc_size)
812
813 /**
814 * for_each_efi_memory_desc - iterate over descriptors in efi.memmap
815 * @md: the efi_memory_desc_t * iterator
816 *
817 * Once the loop finishes @md must not be accessed.
818 */
819 #define for_each_efi_memory_desc(md) \
820 for_each_efi_memory_desc_in_map(&efi.memmap, md)
821
822 /*
823 * Format an EFI memory descriptor's type and attributes to a user-provided
824 * character buffer, as per snprintf(), and return the buffer.
825 */
826 char * __init efi_md_typeattr_format(char *buf, size_t size,
827 const efi_memory_desc_t *md);
828
829
830 typedef void (*efi_element_handler_t)(const char *source,
831 const void *element_data,
832 size_t element_size);
833 extern int __init parse_efi_signature_list(
834 const char *source,
835 const void *data, size_t size,
836 efi_element_handler_t (*get_handler_for_guid)(const efi_guid_t *));
837
838 /**
839 * efi_range_is_wc - check the WC bit on an address range
840 * @start: starting kvirt address
841 * @len: length of range
842 *
843 * Consult the EFI memory map and make sure it's ok to set this range WC.
844 * Returns true or false.
845 */
efi_range_is_wc(unsigned long start,unsigned long len)846 static inline int efi_range_is_wc(unsigned long start, unsigned long len)
847 {
848 unsigned long i;
849
850 for (i = 0; i < len; i += (1UL << EFI_PAGE_SHIFT)) {
851 unsigned long paddr = __pa(start + i);
852 if (!(efi_mem_attributes(paddr) & EFI_MEMORY_WC))
853 return 0;
854 }
855 /* The range checked out */
856 return 1;
857 }
858
859 #ifdef CONFIG_EFI_PCDP
860 extern int __init efi_setup_pcdp_console(char *);
861 #endif
862
863 /*
864 * We play games with efi_enabled so that the compiler will, if
865 * possible, remove EFI-related code altogether.
866 */
867 #define EFI_BOOT 0 /* Were we booted from EFI? */
868 #define EFI_CONFIG_TABLES 2 /* Can we use EFI config tables? */
869 #define EFI_RUNTIME_SERVICES 3 /* Can we use runtime services? */
870 #define EFI_MEMMAP 4 /* Can we use EFI memory map? */
871 #define EFI_64BIT 5 /* Is the firmware 64-bit? */
872 #define EFI_PARAVIRT 6 /* Access is via a paravirt interface */
873 #define EFI_ARCH_1 7 /* First arch-specific bit */
874 #define EFI_DBG 8 /* Print additional debug info at runtime */
875 #define EFI_NX_PE_DATA 9 /* Can runtime data regions be mapped non-executable? */
876 #define EFI_MEM_ATTR 10 /* Did firmware publish an EFI_MEMORY_ATTRIBUTES table? */
877 #define EFI_MEM_NO_SOFT_RESERVE 11 /* Is the kernel configured to ignore soft reservations? */
878 #define EFI_PRESERVE_BS_REGIONS 12 /* Are EFI boot-services memory segments available? */
879
880 #ifdef CONFIG_EFI
881 /*
882 * Test whether the above EFI_* bits are enabled.
883 */
efi_enabled(int feature)884 static inline bool efi_enabled(int feature)
885 {
886 return test_bit(feature, &efi.flags) != 0;
887 }
888 extern void efi_reboot(enum reboot_mode reboot_mode, const char *__unused);
889
890 bool __pure __efi_soft_reserve_enabled(void);
891
efi_soft_reserve_enabled(void)892 static inline bool __pure efi_soft_reserve_enabled(void)
893 {
894 return IS_ENABLED(CONFIG_EFI_SOFT_RESERVE)
895 && __efi_soft_reserve_enabled();
896 }
897
efi_rt_services_supported(unsigned int mask)898 static inline bool efi_rt_services_supported(unsigned int mask)
899 {
900 return (efi.runtime_supported_mask & mask) == mask;
901 }
902 extern void efi_find_mirror(void);
903 #else
efi_enabled(int feature)904 static inline bool efi_enabled(int feature)
905 {
906 return false;
907 }
908 static inline void
efi_reboot(enum reboot_mode reboot_mode,const char * __unused)909 efi_reboot(enum reboot_mode reboot_mode, const char *__unused) {}
910
efi_soft_reserve_enabled(void)911 static inline bool efi_soft_reserve_enabled(void)
912 {
913 return false;
914 }
915
efi_rt_services_supported(unsigned int mask)916 static inline bool efi_rt_services_supported(unsigned int mask)
917 {
918 return false;
919 }
920
efi_find_mirror(void)921 static inline void efi_find_mirror(void) {}
922 #endif
923
924 extern int efi_status_to_err(efi_status_t status);
925
926 /*
927 * Variable Attributes
928 */
929 #define EFI_VARIABLE_NON_VOLATILE 0x0000000000000001
930 #define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
931 #define EFI_VARIABLE_RUNTIME_ACCESS 0x0000000000000004
932 #define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008
933 #define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010
934 #define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020
935 #define EFI_VARIABLE_APPEND_WRITE 0x0000000000000040
936
937 #define EFI_VARIABLE_MASK (EFI_VARIABLE_NON_VOLATILE | \
938 EFI_VARIABLE_BOOTSERVICE_ACCESS | \
939 EFI_VARIABLE_RUNTIME_ACCESS | \
940 EFI_VARIABLE_HARDWARE_ERROR_RECORD | \
941 EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \
942 EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \
943 EFI_VARIABLE_APPEND_WRITE)
944 /*
945 * Length of a GUID string (strlen("aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee"))
946 * not including trailing NUL
947 */
948 #define EFI_VARIABLE_GUID_LEN UUID_STRING_LEN
949
950 /*
951 * EFI Device Path information
952 */
953 #define EFI_DEV_HW 0x01
954 #define EFI_DEV_PCI 1
955 #define EFI_DEV_PCCARD 2
956 #define EFI_DEV_MEM_MAPPED 3
957 #define EFI_DEV_VENDOR 4
958 #define EFI_DEV_CONTROLLER 5
959 #define EFI_DEV_ACPI 0x02
960 #define EFI_DEV_BASIC_ACPI 1
961 #define EFI_DEV_EXPANDED_ACPI 2
962 #define EFI_DEV_MSG 0x03
963 #define EFI_DEV_MSG_ATAPI 1
964 #define EFI_DEV_MSG_SCSI 2
965 #define EFI_DEV_MSG_FC 3
966 #define EFI_DEV_MSG_1394 4
967 #define EFI_DEV_MSG_USB 5
968 #define EFI_DEV_MSG_USB_CLASS 15
969 #define EFI_DEV_MSG_I20 6
970 #define EFI_DEV_MSG_MAC 11
971 #define EFI_DEV_MSG_IPV4 12
972 #define EFI_DEV_MSG_IPV6 13
973 #define EFI_DEV_MSG_INFINIBAND 9
974 #define EFI_DEV_MSG_UART 14
975 #define EFI_DEV_MSG_VENDOR 10
976 #define EFI_DEV_MEDIA 0x04
977 #define EFI_DEV_MEDIA_HARD_DRIVE 1
978 #define EFI_DEV_MEDIA_CDROM 2
979 #define EFI_DEV_MEDIA_VENDOR 3
980 #define EFI_DEV_MEDIA_FILE 4
981 #define EFI_DEV_MEDIA_PROTOCOL 5
982 #define EFI_DEV_MEDIA_REL_OFFSET 8
983 #define EFI_DEV_BIOS_BOOT 0x05
984 #define EFI_DEV_END_PATH 0x7F
985 #define EFI_DEV_END_PATH2 0xFF
986 #define EFI_DEV_END_INSTANCE 0x01
987 #define EFI_DEV_END_ENTIRE 0xFF
988
989 struct efi_generic_dev_path {
990 u8 type;
991 u8 sub_type;
992 u16 length;
993 } __packed;
994
995 struct efi_acpi_dev_path {
996 struct efi_generic_dev_path header;
997 u32 hid;
998 u32 uid;
999 } __packed;
1000
1001 struct efi_pci_dev_path {
1002 struct efi_generic_dev_path header;
1003 u8 fn;
1004 u8 dev;
1005 } __packed;
1006
1007 struct efi_vendor_dev_path {
1008 struct efi_generic_dev_path header;
1009 efi_guid_t vendorguid;
1010 u8 vendordata[];
1011 } __packed;
1012
1013 struct efi_rel_offset_dev_path {
1014 struct efi_generic_dev_path header;
1015 u32 reserved;
1016 u64 starting_offset;
1017 u64 ending_offset;
1018 } __packed;
1019
1020 struct efi_mem_mapped_dev_path {
1021 struct efi_generic_dev_path header;
1022 u32 memory_type;
1023 u64 starting_addr;
1024 u64 ending_addr;
1025 } __packed;
1026
1027 struct efi_file_path_dev_path {
1028 struct efi_generic_dev_path header;
1029 efi_char16_t filename[];
1030 } __packed;
1031
1032 struct efi_dev_path {
1033 union {
1034 struct efi_generic_dev_path header;
1035 struct efi_acpi_dev_path acpi;
1036 struct efi_pci_dev_path pci;
1037 struct efi_vendor_dev_path vendor;
1038 struct efi_rel_offset_dev_path rel_offset;
1039 };
1040 } __packed;
1041
1042 struct device *efi_get_device_by_path(const struct efi_dev_path **node,
1043 size_t *len);
1044
memrange_efi_to_native(u64 * addr,u64 * npages)1045 static inline void memrange_efi_to_native(u64 *addr, u64 *npages)
1046 {
1047 *npages = PFN_UP(*addr + (*npages<<EFI_PAGE_SHIFT)) - PFN_DOWN(*addr);
1048 *addr &= PAGE_MASK;
1049 }
1050
1051 /*
1052 * EFI Variable support.
1053 *
1054 * Different firmware drivers can expose their EFI-like variables using
1055 * the following.
1056 */
1057
1058 struct efivar_operations {
1059 efi_get_variable_t *get_variable;
1060 efi_get_next_variable_t *get_next_variable;
1061 efi_set_variable_t *set_variable;
1062 efi_set_variable_t *set_variable_nonblocking;
1063 efi_query_variable_store_t *query_variable_store;
1064 efi_query_variable_info_t *query_variable_info;
1065 };
1066
1067 struct efivars {
1068 struct kset *kset;
1069 const struct efivar_operations *ops;
1070 };
1071
1072 #ifdef CONFIG_X86
1073 u64 __attribute_const__ efivar_reserved_space(void);
1074 #else
efivar_reserved_space(void)1075 static inline u64 efivar_reserved_space(void) { return 0; }
1076 #endif
1077
1078 /*
1079 * The maximum size of VariableName + Data = 1024
1080 * Therefore, it's reasonable to save that much
1081 * space in each part of the structure,
1082 * and we use a page for reading/writing.
1083 */
1084
1085 #define EFI_VAR_NAME_LEN 1024
1086
1087 int efivars_register(struct efivars *efivars,
1088 const struct efivar_operations *ops);
1089 int efivars_unregister(struct efivars *efivars);
1090
1091 #ifdef CONFIG_EFI
1092 bool efivar_is_available(void);
1093 #else
efivar_is_available(void)1094 static inline bool efivar_is_available(void) { return false; }
1095 #endif
1096
1097 bool efivar_supports_writes(void);
1098
1099 int efivar_lock(void);
1100 int efivar_trylock(void);
1101 void efivar_unlock(void);
1102
1103 efi_status_t efivar_get_variable(efi_char16_t *name, efi_guid_t *vendor,
1104 u32 *attr, unsigned long *size, void *data);
1105
1106 efi_status_t efivar_get_next_variable(unsigned long *name_size,
1107 efi_char16_t *name, efi_guid_t *vendor);
1108
1109 efi_status_t efivar_set_variable_locked(efi_char16_t *name, efi_guid_t *vendor,
1110 u32 attr, unsigned long data_size,
1111 void *data, bool nonblocking);
1112
1113 efi_status_t efivar_set_variable(efi_char16_t *name, efi_guid_t *vendor,
1114 u32 attr, unsigned long data_size, void *data);
1115
1116 efi_status_t efivar_query_variable_info(u32 attr, u64 *storage_space,
1117 u64 *remaining_space,
1118 u64 *max_variable_size);
1119
1120 #if IS_ENABLED(CONFIG_EFI_CAPSULE_LOADER)
1121 extern bool efi_capsule_pending(int *reset_type);
1122
1123 extern int efi_capsule_supported(efi_guid_t guid, u32 flags,
1124 size_t size, int *reset);
1125
1126 extern int efi_capsule_update(efi_capsule_header_t *capsule,
1127 phys_addr_t *pages);
1128 #else
efi_capsule_pending(int * reset_type)1129 static inline bool efi_capsule_pending(int *reset_type) { return false; }
1130 #endif
1131
1132 #ifdef CONFIG_EFI
1133 extern bool efi_runtime_disabled(void);
1134 #else
efi_runtime_disabled(void)1135 static inline bool efi_runtime_disabled(void) { return true; }
1136 #endif
1137
1138 extern void efi_call_virt_check_flags(unsigned long flags, const void *caller);
1139 extern unsigned long efi_call_virt_save_flags(void);
1140
1141 enum efi_secureboot_mode {
1142 efi_secureboot_mode_unset,
1143 efi_secureboot_mode_unknown,
1144 efi_secureboot_mode_disabled,
1145 efi_secureboot_mode_enabled,
1146 };
1147
1148 static inline
efi_get_secureboot_mode(efi_get_variable_t * get_var)1149 enum efi_secureboot_mode efi_get_secureboot_mode(efi_get_variable_t *get_var)
1150 {
1151 u8 secboot, setupmode = 0;
1152 efi_status_t status;
1153 unsigned long size;
1154
1155 size = sizeof(secboot);
1156 status = get_var(L"SecureBoot", &EFI_GLOBAL_VARIABLE_GUID, NULL, &size,
1157 &secboot);
1158 if (status == EFI_NOT_FOUND)
1159 return efi_secureboot_mode_disabled;
1160 if (status != EFI_SUCCESS)
1161 return efi_secureboot_mode_unknown;
1162
1163 size = sizeof(setupmode);
1164 get_var(L"SetupMode", &EFI_GLOBAL_VARIABLE_GUID, NULL, &size, &setupmode);
1165 if (secboot == 0 || setupmode == 1)
1166 return efi_secureboot_mode_disabled;
1167 return efi_secureboot_mode_enabled;
1168 }
1169
1170 #ifdef CONFIG_EFI_EMBEDDED_FIRMWARE
1171 void efi_check_for_embedded_firmwares(void);
1172 #else
efi_check_for_embedded_firmwares(void)1173 static inline void efi_check_for_embedded_firmwares(void) { }
1174 #endif
1175
1176 #define arch_efi_call_virt(p, f, args...) ((p)->f(args))
1177
1178 /*
1179 * Arch code must implement the following three routines:
1180 *
1181 * * arch_efi_call_virt_setup()
1182 *
1183 * Sets up the environment for the call (e.g. switching page tables,
1184 * allowing kernel-mode use of floating point, if required).
1185 *
1186 * * arch_efi_call_virt()
1187 *
1188 * Performs the call. This routine takes a variable number of arguments so
1189 * it must be implemented as a variadic preprocessor macro.
1190 *
1191 * * arch_efi_call_virt_teardown()
1192 *
1193 * Restores the usual kernel environment once the call has returned.
1194 */
1195
1196 #define efi_call_virt_pointer(p, f, args...) \
1197 ({ \
1198 typeof((p)->f(args)) __s; \
1199 unsigned long __flags; \
1200 \
1201 arch_efi_call_virt_setup(); \
1202 \
1203 __flags = efi_call_virt_save_flags(); \
1204 __s = arch_efi_call_virt(p, f, args); \
1205 efi_call_virt_check_flags(__flags, NULL); \
1206 \
1207 arch_efi_call_virt_teardown(); \
1208 \
1209 __s; \
1210 })
1211
1212 #define EFI_RANDOM_SEED_SIZE 32U // BLAKE2S_HASH_SIZE
1213
1214 struct linux_efi_random_seed {
1215 u32 size;
1216 u8 bits[];
1217 };
1218
1219 struct linux_efi_tpm_eventlog {
1220 u32 size;
1221 u32 final_events_preboot_size;
1222 u8 version;
1223 u8 log[];
1224 };
1225
1226 extern int efi_tpm_eventlog_init(void);
1227
1228 struct efi_tcg2_final_events_table {
1229 u64 version;
1230 u64 nr_events;
1231 u8 events[];
1232 };
1233 extern int efi_tpm_final_log_size;
1234
1235 extern unsigned long rci2_table_phys;
1236
1237 efi_status_t
1238 efi_call_acpi_prm_handler(efi_status_t (__efiapi *handler_addr)(u64, void *),
1239 u64 param_buffer_addr, void *context);
1240
1241 /*
1242 * efi_runtime_service() function identifiers.
1243 * "NONE" is used by efi_recover_from_page_fault() to check if the page
1244 * fault happened while executing an efi runtime service.
1245 */
1246 enum efi_rts_ids {
1247 EFI_NONE,
1248 EFI_GET_TIME,
1249 EFI_SET_TIME,
1250 EFI_GET_WAKEUP_TIME,
1251 EFI_SET_WAKEUP_TIME,
1252 EFI_GET_VARIABLE,
1253 EFI_GET_NEXT_VARIABLE,
1254 EFI_SET_VARIABLE,
1255 EFI_QUERY_VARIABLE_INFO,
1256 EFI_GET_NEXT_HIGH_MONO_COUNT,
1257 EFI_RESET_SYSTEM,
1258 EFI_UPDATE_CAPSULE,
1259 EFI_QUERY_CAPSULE_CAPS,
1260 EFI_ACPI_PRM_HANDLER,
1261 };
1262
1263 union efi_rts_args;
1264
1265 /*
1266 * efi_runtime_work: Details of EFI Runtime Service work
1267 * @args: Pointer to union describing the arguments
1268 * @status: Status of executing EFI Runtime Service
1269 * @efi_rts_id: EFI Runtime Service function identifier
1270 * @efi_rts_comp: Struct used for handling completions
1271 * @caller: The caller of the runtime service
1272 */
1273 struct efi_runtime_work {
1274 union efi_rts_args *args;
1275 efi_status_t status;
1276 struct work_struct work;
1277 enum efi_rts_ids efi_rts_id;
1278 struct completion efi_rts_comp;
1279 const void *caller;
1280 };
1281
1282 extern struct efi_runtime_work efi_rts_work;
1283
1284 /* Workqueue to queue EFI Runtime Services */
1285 extern struct workqueue_struct *efi_rts_wq;
1286
1287 struct linux_efi_memreserve {
1288 int size; // allocated size of the array
1289 atomic_t count; // number of entries used
1290 phys_addr_t next; // pa of next struct instance
1291 struct {
1292 phys_addr_t base;
1293 phys_addr_t size;
1294 } entry[];
1295 };
1296
1297 #define EFI_MEMRESERVE_COUNT(size) (((size) - sizeof(struct linux_efi_memreserve)) \
1298 / sizeof_field(struct linux_efi_memreserve, entry[0]))
1299
1300 void __init efi_arch_mem_reserve(phys_addr_t addr, u64 size);
1301
1302 char *efi_systab_show_arch(char *str);
1303
1304 /*
1305 * The LINUX_EFI_MOK_VARIABLE_TABLE_GUID config table can be provided
1306 * to the kernel by an EFI boot loader. The table contains a packed
1307 * sequence of these entries, one for each named MOK variable.
1308 * The sequence is terminated by an entry with a completely NULL
1309 * name and 0 data size.
1310 */
1311 struct efi_mokvar_table_entry {
1312 char name[256];
1313 u64 data_size;
1314 u8 data[];
1315 } __attribute((packed));
1316
1317 #ifdef CONFIG_LOAD_UEFI_KEYS
1318 extern void __init efi_mokvar_table_init(void);
1319 extern struct efi_mokvar_table_entry *efi_mokvar_entry_next(
1320 struct efi_mokvar_table_entry **mokvar_entry);
1321 extern struct efi_mokvar_table_entry *efi_mokvar_entry_find(const char *name);
1322 #else
efi_mokvar_table_init(void)1323 static inline void efi_mokvar_table_init(void) { }
efi_mokvar_entry_next(struct efi_mokvar_table_entry ** mokvar_entry)1324 static inline struct efi_mokvar_table_entry *efi_mokvar_entry_next(
1325 struct efi_mokvar_table_entry **mokvar_entry)
1326 {
1327 return NULL;
1328 }
efi_mokvar_entry_find(const char * name)1329 static inline struct efi_mokvar_table_entry *efi_mokvar_entry_find(
1330 const char *name)
1331 {
1332 return NULL;
1333 }
1334 #endif
1335
1336 extern void efifb_setup_from_dmi(struct screen_info *si, const char *opt);
1337
1338 struct linux_efi_coco_secret_area {
1339 u64 base_pa;
1340 u64 size;
1341 };
1342
1343 struct linux_efi_initrd {
1344 unsigned long base;
1345 unsigned long size;
1346 };
1347
1348 /* Header of a populated EFI secret area */
1349 #define EFI_SECRET_TABLE_HEADER_GUID EFI_GUID(0x1e74f542, 0x71dd, 0x4d66, 0x96, 0x3e, 0xef, 0x42, 0x87, 0xff, 0x17, 0x3b)
1350
1351 bool xen_efi_config_table_is_usable(const efi_guid_t *guid, unsigned long table);
1352
1353 static inline
efi_config_table_is_usable(const efi_guid_t * guid,unsigned long table)1354 bool efi_config_table_is_usable(const efi_guid_t *guid, unsigned long table)
1355 {
1356 if (!IS_ENABLED(CONFIG_XEN_EFI))
1357 return true;
1358 return xen_efi_config_table_is_usable(guid, table);
1359 }
1360
1361 umode_t efi_attr_is_visible(struct kobject *kobj, struct attribute *attr, int n);
1362
1363 #endif /* _LINUX_EFI_H */
1364