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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
5b83683f HY |
2 | /* |
3 | * x86_64 specific EFI support functions | |
4 | * Based on Extensible Firmware Interface Specification version 1.0 | |
5 | * | |
6 | * Copyright (C) 2005-2008 Intel Co. | |
7 | * Fenghua Yu <fenghua.yu@intel.com> | |
8 | * Bibo Mao <bibo.mao@intel.com> | |
9 | * Chandramouli Narayanan <mouli@linux.intel.com> | |
10 | * Huang Ying <ying.huang@intel.com> | |
11 | * | |
12 | * Code to convert EFI to E820 map has been implemented in elilo bootloader | |
13 | * based on a EFI patch by Edgar Hucek. Based on the E820 map, the page table | |
14 | * is setup appropriately for EFI runtime code. | |
15 | * - mouli 06/14/2007. | |
16 | * | |
17 | */ | |
18 | ||
26d7f65f MF |
19 | #define pr_fmt(fmt) "efi: " fmt |
20 | ||
5b83683f HY |
21 | #include <linux/kernel.h> |
22 | #include <linux/init.h> | |
23 | #include <linux/mm.h> | |
24 | #include <linux/types.h> | |
25 | #include <linux/spinlock.h> | |
57c8a661 | 26 | #include <linux/memblock.h> |
5b83683f | 27 | #include <linux/ioport.h> |
5ab788d7 | 28 | #include <linux/mc146818rtc.h> |
5b83683f | 29 | #include <linux/efi.h> |
116fef64 | 30 | #include <linux/export.h> |
5b83683f HY |
31 | #include <linux/uaccess.h> |
32 | #include <linux/io.h> | |
33 | #include <linux/reboot.h> | |
0d01ff25 | 34 | #include <linux/slab.h> |
f6697df3 | 35 | #include <linux/ucs2_string.h> |
1379edd5 | 36 | #include <linux/mem_encrypt.h> |
03781e40 | 37 | #include <linux/sched/task.h> |
5b83683f HY |
38 | |
39 | #include <asm/setup.h> | |
40 | #include <asm/page.h> | |
66441bd3 | 41 | #include <asm/e820/api.h> |
5b83683f HY |
42 | #include <asm/pgtable.h> |
43 | #include <asm/tlbflush.h> | |
5b83683f HY |
44 | #include <asm/proto.h> |
45 | #include <asm/efi.h> | |
4de0d4a6 | 46 | #include <asm/cacheflush.h> |
3819cd48 | 47 | #include <asm/fixmap.h> |
d2f7cbe7 | 48 | #include <asm/realmode.h> |
4f9dbcfc | 49 | #include <asm/time.h> |
67a9108e | 50 | #include <asm/pgalloc.h> |
5b83683f | 51 | |
d2f7cbe7 | 52 | /* |
b1d17761 | 53 | * We allocate runtime services regions top-down, starting from -4G, i.e. |
d2f7cbe7 BP |
54 | * 0xffff_ffff_0000_0000 and limit EFI VA mapping space to 64G. |
55 | */ | |
8266e31e | 56 | static u64 efi_va = EFI_VA_START; |
d2f7cbe7 | 57 | |
c9f2a9a6 | 58 | struct efi_scratch efi_scratch; |
d2f7cbe7 | 59 | |
9cd2b07c | 60 | static void __init early_code_mapping_set_exec(int executable) |
5b83683f HY |
61 | { |
62 | efi_memory_desc_t *md; | |
5b83683f | 63 | |
a2172e25 HY |
64 | if (!(__supported_pte_mask & _PAGE_NX)) |
65 | return; | |
66 | ||
916f676f | 67 | /* Make EFI service code area executable */ |
78ce248f | 68 | for_each_efi_memory_desc(md) { |
916f676f MG |
69 | if (md->type == EFI_RUNTIME_SERVICES_CODE || |
70 | md->type == EFI_BOOT_SERVICES_CODE) | |
9cd2b07c | 71 | efi_set_executable(md, executable); |
5b83683f HY |
72 | } |
73 | } | |
74 | ||
744937b0 | 75 | pgd_t * __init efi_call_phys_prolog(void) |
5b83683f | 76 | { |
94133e46 BH |
77 | unsigned long vaddr, addr_pgd, addr_p4d, addr_pud; |
78 | pgd_t *save_pgd, *pgd_k, *pgd_efi; | |
79 | p4d_t *p4d, *p4d_k, *p4d_efi; | |
80 | pud_t *pud; | |
744937b0 | 81 | |
b8f2c21d | 82 | int pgd; |
94133e46 | 83 | int n_pgds, i, j; |
5b83683f | 84 | |
c9f2a9a6 | 85 | if (!efi_enabled(EFI_OLD_MEMMAP)) { |
03781e40 | 86 | efi_switch_mm(&efi_mm); |
4e78921b | 87 | return efi_mm.pgd; |
c9f2a9a6 | 88 | } |
d2f7cbe7 | 89 | |
9cd2b07c | 90 | early_code_mapping_set_exec(1); |
b8f2c21d NZ |
91 | |
92 | n_pgds = DIV_ROUND_UP((max_pfn << PAGE_SHIFT), PGDIR_SIZE); | |
20ebc15e | 93 | save_pgd = kmalloc_array(n_pgds, sizeof(*save_pgd), GFP_KERNEL); |
4e78921b GZ |
94 | if (!save_pgd) |
95 | return NULL; | |
b8f2c21d | 96 | |
94133e46 BH |
97 | /* |
98 | * Build 1:1 identity mapping for efi=old_map usage. Note that | |
99 | * PAGE_OFFSET is PGDIR_SIZE aligned when KASLR is disabled, while | |
100 | * it is PUD_SIZE ALIGNED with KASLR enabled. So for a given physical | |
101 | * address X, the pud_index(X) != pud_index(__va(X)), we can only copy | |
102 | * PUD entry of __va(X) to fill in pud entry of X to build 1:1 mapping. | |
103 | * This means here we can only reuse the PMD tables of the direct mapping. | |
104 | */ | |
b8f2c21d | 105 | for (pgd = 0; pgd < n_pgds; pgd++) { |
94133e46 BH |
106 | addr_pgd = (unsigned long)(pgd * PGDIR_SIZE); |
107 | vaddr = (unsigned long)__va(pgd * PGDIR_SIZE); | |
108 | pgd_efi = pgd_offset_k(addr_pgd); | |
109 | save_pgd[pgd] = *pgd_efi; | |
110 | ||
111 | p4d = p4d_alloc(&init_mm, pgd_efi, addr_pgd); | |
112 | if (!p4d) { | |
113 | pr_err("Failed to allocate p4d table!\n"); | |
114 | goto out; | |
115 | } | |
116 | ||
117 | for (i = 0; i < PTRS_PER_P4D; i++) { | |
118 | addr_p4d = addr_pgd + i * P4D_SIZE; | |
119 | p4d_efi = p4d + p4d_index(addr_p4d); | |
120 | ||
121 | pud = pud_alloc(&init_mm, p4d_efi, addr_p4d); | |
122 | if (!pud) { | |
123 | pr_err("Failed to allocate pud table!\n"); | |
124 | goto out; | |
125 | } | |
126 | ||
127 | for (j = 0; j < PTRS_PER_PUD; j++) { | |
128 | addr_pud = addr_p4d + j * PUD_SIZE; | |
129 | ||
130 | if (addr_pud > (max_pfn << PAGE_SHIFT)) | |
131 | break; | |
132 | ||
133 | vaddr = (unsigned long)__va(addr_pud); | |
134 | ||
135 | pgd_k = pgd_offset_k(vaddr); | |
136 | p4d_k = p4d_offset(pgd_k, vaddr); | |
137 | pud[j] = *pud_offset(p4d_k, vaddr); | |
138 | } | |
139 | } | |
de53c378 | 140 | pgd_offset_k(pgd * PGDIR_SIZE)->pgd &= ~_PAGE_NX; |
b8f2c21d | 141 | } |
de53c378 | 142 | |
5b83683f | 143 | __flush_tlb_all(); |
744937b0 | 144 | return save_pgd; |
4e78921b GZ |
145 | out: |
146 | efi_call_phys_epilog(save_pgd); | |
147 | return NULL; | |
5b83683f HY |
148 | } |
149 | ||
744937b0 | 150 | void __init efi_call_phys_epilog(pgd_t *save_pgd) |
5b83683f HY |
151 | { |
152 | /* | |
153 | * After the lock is released, the original page table is restored. | |
154 | */ | |
94133e46 | 155 | int pgd_idx, i; |
744937b0 | 156 | int nr_pgds; |
94133e46 BH |
157 | pgd_t *pgd; |
158 | p4d_t *p4d; | |
159 | pud_t *pud; | |
d2f7cbe7 | 160 | |
c9f2a9a6 | 161 | if (!efi_enabled(EFI_OLD_MEMMAP)) { |
03781e40 | 162 | efi_switch_mm(efi_scratch.prev_mm); |
d2f7cbe7 | 163 | return; |
c9f2a9a6 | 164 | } |
d2f7cbe7 | 165 | |
744937b0 IM |
166 | nr_pgds = DIV_ROUND_UP((max_pfn << PAGE_SHIFT) , PGDIR_SIZE); |
167 | ||
94133e46 BH |
168 | for (pgd_idx = 0; pgd_idx < nr_pgds; pgd_idx++) { |
169 | pgd = pgd_offset_k(pgd_idx * PGDIR_SIZE); | |
744937b0 IM |
170 | set_pgd(pgd_offset_k(pgd_idx * PGDIR_SIZE), save_pgd[pgd_idx]); |
171 | ||
cfe19577 | 172 | if (!pgd_present(*pgd)) |
94133e46 BH |
173 | continue; |
174 | ||
175 | for (i = 0; i < PTRS_PER_P4D; i++) { | |
176 | p4d = p4d_offset(pgd, | |
177 | pgd_idx * PGDIR_SIZE + i * P4D_SIZE); | |
178 | ||
cfe19577 | 179 | if (!p4d_present(*p4d)) |
94133e46 BH |
180 | continue; |
181 | ||
182 | pud = (pud_t *)p4d_page_vaddr(*p4d); | |
183 | pud_free(&init_mm, pud); | |
184 | } | |
185 | ||
186 | p4d = (p4d_t *)pgd_page_vaddr(*pgd); | |
187 | p4d_free(&init_mm, p4d); | |
188 | } | |
189 | ||
b8f2c21d | 190 | kfree(save_pgd); |
744937b0 | 191 | |
5b83683f | 192 | __flush_tlb_all(); |
9cd2b07c | 193 | early_code_mapping_set_exec(0); |
5b83683f | 194 | } |
e1ad783b | 195 | |
3ede3417 | 196 | EXPORT_SYMBOL_GPL(efi_mm); |
67a9108e MF |
197 | |
198 | /* | |
199 | * We need our own copy of the higher levels of the page tables | |
200 | * because we want to avoid inserting EFI region mappings (EFI_VA_END | |
201 | * to EFI_VA_START) into the standard kernel page tables. Everything | |
202 | * else can be shared, see efi_sync_low_kernel_mappings(). | |
d9e9a641 DH |
203 | * |
204 | * We don't want the pgd on the pgd_list and cannot use pgd_alloc() for the | |
205 | * allocation. | |
67a9108e MF |
206 | */ |
207 | int __init efi_alloc_page_tables(void) | |
208 | { | |
3ede3417 | 209 | pgd_t *pgd, *efi_pgd; |
e981316f | 210 | p4d_t *p4d; |
67a9108e MF |
211 | pud_t *pud; |
212 | gfp_t gfp_mask; | |
213 | ||
214 | if (efi_enabled(EFI_OLD_MEMMAP)) | |
215 | return 0; | |
216 | ||
75f296d9 | 217 | gfp_mask = GFP_KERNEL | __GFP_ZERO; |
d9e9a641 | 218 | efi_pgd = (pgd_t *)__get_free_pages(gfp_mask, PGD_ALLOCATION_ORDER); |
67a9108e MF |
219 | if (!efi_pgd) |
220 | return -ENOMEM; | |
221 | ||
222 | pgd = efi_pgd + pgd_index(EFI_VA_END); | |
e981316f KS |
223 | p4d = p4d_alloc(&init_mm, pgd, EFI_VA_END); |
224 | if (!p4d) { | |
225 | free_page((unsigned long)efi_pgd); | |
226 | return -ENOMEM; | |
227 | } | |
67a9108e | 228 | |
e981316f | 229 | pud = pud_alloc(&init_mm, p4d, EFI_VA_END); |
67a9108e | 230 | if (!pud) { |
ed7588d5 | 231 | if (pgtable_l5_enabled()) |
e981316f | 232 | free_page((unsigned long) pgd_page_vaddr(*pgd)); |
06ace26f | 233 | free_pages((unsigned long)efi_pgd, PGD_ALLOCATION_ORDER); |
67a9108e MF |
234 | return -ENOMEM; |
235 | } | |
236 | ||
3ede3417 | 237 | efi_mm.pgd = efi_pgd; |
7e904a91 SP |
238 | mm_init_cpumask(&efi_mm); |
239 | init_new_context(NULL, &efi_mm); | |
240 | ||
67a9108e MF |
241 | return 0; |
242 | } | |
243 | ||
d2f7cbe7 BP |
244 | /* |
245 | * Add low kernel mappings for passing arguments to EFI functions. | |
246 | */ | |
247 | void efi_sync_low_kernel_mappings(void) | |
248 | { | |
67a9108e MF |
249 | unsigned num_entries; |
250 | pgd_t *pgd_k, *pgd_efi; | |
e0c4f675 | 251 | p4d_t *p4d_k, *p4d_efi; |
67a9108e | 252 | pud_t *pud_k, *pud_efi; |
3ede3417 | 253 | pgd_t *efi_pgd = efi_mm.pgd; |
d2f7cbe7 BP |
254 | |
255 | if (efi_enabled(EFI_OLD_MEMMAP)) | |
256 | return; | |
257 | ||
67a9108e MF |
258 | /* |
259 | * We can share all PGD entries apart from the one entry that | |
260 | * covers the EFI runtime mapping space. | |
261 | * | |
262 | * Make sure the EFI runtime region mappings are guaranteed to | |
263 | * only span a single PGD entry and that the entry also maps | |
264 | * other important kernel regions. | |
265 | */ | |
c65e774f KS |
266 | MAYBE_BUILD_BUG_ON(pgd_index(EFI_VA_END) != pgd_index(MODULES_END)); |
267 | MAYBE_BUILD_BUG_ON((EFI_VA_START & PGDIR_MASK) != | |
67a9108e MF |
268 | (EFI_VA_END & PGDIR_MASK)); |
269 | ||
270 | pgd_efi = efi_pgd + pgd_index(PAGE_OFFSET); | |
271 | pgd_k = pgd_offset_k(PAGE_OFFSET); | |
272 | ||
273 | num_entries = pgd_index(EFI_VA_END) - pgd_index(PAGE_OFFSET); | |
274 | memcpy(pgd_efi, pgd_k, sizeof(pgd_t) * num_entries); | |
d2f7cbe7 | 275 | |
e981316f KS |
276 | /* |
277 | * As with PGDs, we share all P4D entries apart from the one entry | |
278 | * that covers the EFI runtime mapping space. | |
279 | */ | |
280 | BUILD_BUG_ON(p4d_index(EFI_VA_END) != p4d_index(MODULES_END)); | |
281 | BUILD_BUG_ON((EFI_VA_START & P4D_MASK) != (EFI_VA_END & P4D_MASK)); | |
282 | ||
283 | pgd_efi = efi_pgd + pgd_index(EFI_VA_END); | |
284 | pgd_k = pgd_offset_k(EFI_VA_END); | |
285 | p4d_efi = p4d_offset(pgd_efi, 0); | |
286 | p4d_k = p4d_offset(pgd_k, 0); | |
287 | ||
288 | num_entries = p4d_index(EFI_VA_END); | |
289 | memcpy(p4d_efi, p4d_k, sizeof(p4d_t) * num_entries); | |
290 | ||
67a9108e MF |
291 | /* |
292 | * We share all the PUD entries apart from those that map the | |
293 | * EFI regions. Copy around them. | |
294 | */ | |
295 | BUILD_BUG_ON((EFI_VA_START & ~PUD_MASK) != 0); | |
296 | BUILD_BUG_ON((EFI_VA_END & ~PUD_MASK) != 0); | |
297 | ||
e981316f KS |
298 | p4d_efi = p4d_offset(pgd_efi, EFI_VA_END); |
299 | p4d_k = p4d_offset(pgd_k, EFI_VA_END); | |
e0c4f675 | 300 | pud_efi = pud_offset(p4d_efi, 0); |
e0c4f675 | 301 | pud_k = pud_offset(p4d_k, 0); |
67a9108e MF |
302 | |
303 | num_entries = pud_index(EFI_VA_END); | |
304 | memcpy(pud_efi, pud_k, sizeof(pud_t) * num_entries); | |
305 | ||
e0c4f675 | 306 | pud_efi = pud_offset(p4d_efi, EFI_VA_START); |
e0c4f675 | 307 | pud_k = pud_offset(p4d_k, EFI_VA_START); |
67a9108e MF |
308 | |
309 | num_entries = PTRS_PER_PUD - pud_index(EFI_VA_START); | |
310 | memcpy(pud_efi, pud_k, sizeof(pud_t) * num_entries); | |
d2f7cbe7 BP |
311 | } |
312 | ||
f6697df3 MF |
313 | /* |
314 | * Wrapper for slow_virt_to_phys() that handles NULL addresses. | |
315 | */ | |
316 | static inline phys_addr_t | |
317 | virt_to_phys_or_null_size(void *va, unsigned long size) | |
318 | { | |
319 | bool bad_size; | |
320 | ||
321 | if (!va) | |
322 | return 0; | |
323 | ||
324 | if (virt_addr_valid(va)) | |
325 | return virt_to_phys(va); | |
326 | ||
327 | /* | |
328 | * A fully aligned variable on the stack is guaranteed not to | |
329 | * cross a page bounary. Try to catch strings on the stack by | |
330 | * checking that 'size' is a power of two. | |
331 | */ | |
332 | bad_size = size > PAGE_SIZE || !is_power_of_2(size); | |
333 | ||
334 | WARN_ON(!IS_ALIGNED((unsigned long)va, size) || bad_size); | |
335 | ||
336 | return slow_virt_to_phys(va); | |
337 | } | |
338 | ||
339 | #define virt_to_phys_or_null(addr) \ | |
340 | virt_to_phys_or_null_size((addr), sizeof(*(addr))) | |
341 | ||
4e78eb05 | 342 | int __init efi_setup_page_tables(unsigned long pa_memmap, unsigned num_pages) |
d2f7cbe7 | 343 | { |
38eecccd | 344 | unsigned long pfn, text, pf; |
4f9dbcfc | 345 | struct page *page; |
994448f1 | 346 | unsigned npages; |
3ede3417 | 347 | pgd_t *pgd = efi_mm.pgd; |
b7b898ae BP |
348 | |
349 | if (efi_enabled(EFI_OLD_MEMMAP)) | |
350 | return 0; | |
351 | ||
b7b898ae BP |
352 | /* |
353 | * It can happen that the physical address of new_memmap lands in memory | |
354 | * which is not mapped in the EFI page table. Therefore we need to go | |
355 | * and ident-map those pages containing the map before calling | |
356 | * phys_efi_set_virtual_address_map(). | |
357 | */ | |
edc3b912 | 358 | pfn = pa_memmap >> PAGE_SHIFT; |
38eecccd TL |
359 | pf = _PAGE_NX | _PAGE_RW | _PAGE_ENC; |
360 | if (kernel_map_pages_in_pgd(pgd, pfn, pa_memmap, num_pages, pf)) { | |
b7b898ae BP |
361 | pr_err("Error ident-mapping new memmap (0x%lx)!\n", pa_memmap); |
362 | return 1; | |
363 | } | |
364 | ||
bf29bddf JK |
365 | /* |
366 | * Certain firmware versions are way too sentimential and still believe | |
367 | * they are exclusive and unquestionable owners of the first physical page, | |
368 | * even though they explicitly mark it as EFI_CONVENTIONAL_MEMORY | |
369 | * (but then write-access it later during SetVirtualAddressMap()). | |
370 | * | |
371 | * Create a 1:1 mapping for this page, to avoid triple faults during early | |
372 | * boot with such firmware. We are free to hand this page to the BIOS, | |
373 | * as trim_bios_range() will reserve the first page and isolate it away | |
374 | * from memory allocators anyway. | |
375 | */ | |
1379edd5 TL |
376 | pf = _PAGE_RW; |
377 | if (sev_active()) | |
378 | pf |= _PAGE_ENC; | |
379 | ||
380 | if (kernel_map_pages_in_pgd(pgd, 0x0, 0x0, 1, pf)) { | |
bf29bddf JK |
381 | pr_err("Failed to create 1:1 mapping for the first page!\n"); |
382 | return 1; | |
383 | } | |
384 | ||
4f9dbcfc MF |
385 | /* |
386 | * When making calls to the firmware everything needs to be 1:1 | |
387 | * mapped and addressable with 32-bit pointers. Map the kernel | |
388 | * text and allocate a new stack because we can't rely on the | |
389 | * stack pointer being < 4GB. | |
390 | */ | |
12976670 | 391 | if (!IS_ENABLED(CONFIG_EFI_MIXED) || efi_is_native()) |
994448f1 | 392 | return 0; |
4f9dbcfc MF |
393 | |
394 | page = alloc_page(GFP_KERNEL|__GFP_DMA32); | |
395 | if (!page) | |
396 | panic("Unable to allocate EFI runtime stack < 4GB\n"); | |
397 | ||
398 | efi_scratch.phys_stack = virt_to_phys(page_address(page)); | |
399 | efi_scratch.phys_stack += PAGE_SIZE; /* stack grows down */ | |
400 | ||
2ad510dc | 401 | npages = (_etext - _text) >> PAGE_SHIFT; |
4f9dbcfc | 402 | text = __pa(_text); |
edc3b912 | 403 | pfn = text >> PAGE_SHIFT; |
4f9dbcfc | 404 | |
38eecccd TL |
405 | pf = _PAGE_RW | _PAGE_ENC; |
406 | if (kernel_map_pages_in_pgd(pgd, pfn, text, npages, pf)) { | |
4f9dbcfc | 407 | pr_err("Failed to map kernel text 1:1\n"); |
994448f1 | 408 | return 1; |
4f9dbcfc | 409 | } |
b7b898ae BP |
410 | |
411 | return 0; | |
412 | } | |
413 | ||
d2f7cbe7 BP |
414 | static void __init __map_region(efi_memory_desc_t *md, u64 va) |
415 | { | |
15f003d2 | 416 | unsigned long flags = _PAGE_RW; |
edc3b912 | 417 | unsigned long pfn; |
3ede3417 | 418 | pgd_t *pgd = efi_mm.pgd; |
d2f7cbe7 BP |
419 | |
420 | if (!(md->attribute & EFI_MEMORY_WB)) | |
edc3b912 | 421 | flags |= _PAGE_PCD; |
d2f7cbe7 | 422 | |
9b788f32 | 423 | if (sev_active() && md->type != EFI_MEMORY_MAPPED_IO) |
1379edd5 TL |
424 | flags |= _PAGE_ENC; |
425 | ||
edc3b912 MF |
426 | pfn = md->phys_addr >> PAGE_SHIFT; |
427 | if (kernel_map_pages_in_pgd(pgd, pfn, va, md->num_pages, flags)) | |
d2f7cbe7 BP |
428 | pr_warn("Error mapping PA 0x%llx -> VA 0x%llx!\n", |
429 | md->phys_addr, va); | |
430 | } | |
431 | ||
432 | void __init efi_map_region(efi_memory_desc_t *md) | |
433 | { | |
434 | unsigned long size = md->num_pages << PAGE_SHIFT; | |
435 | u64 pa = md->phys_addr; | |
436 | ||
437 | if (efi_enabled(EFI_OLD_MEMMAP)) | |
438 | return old_map_region(md); | |
439 | ||
440 | /* | |
441 | * Make sure the 1:1 mappings are present as a catch-all for b0rked | |
442 | * firmware which doesn't update all internal pointers after switching | |
443 | * to virtual mode and would otherwise crap on us. | |
444 | */ | |
445 | __map_region(md, md->phys_addr); | |
446 | ||
4f9dbcfc MF |
447 | /* |
448 | * Enforce the 1:1 mapping as the default virtual address when | |
449 | * booting in EFI mixed mode, because even though we may be | |
450 | * running a 64-bit kernel, the firmware may only be 32-bit. | |
451 | */ | |
452 | if (!efi_is_native () && IS_ENABLED(CONFIG_EFI_MIXED)) { | |
453 | md->virt_addr = md->phys_addr; | |
454 | return; | |
455 | } | |
456 | ||
d2f7cbe7 BP |
457 | efi_va -= size; |
458 | ||
459 | /* Is PA 2M-aligned? */ | |
460 | if (!(pa & (PMD_SIZE - 1))) { | |
461 | efi_va &= PMD_MASK; | |
462 | } else { | |
463 | u64 pa_offset = pa & (PMD_SIZE - 1); | |
464 | u64 prev_va = efi_va; | |
465 | ||
466 | /* get us the same offset within this 2M page */ | |
467 | efi_va = (efi_va & PMD_MASK) + pa_offset; | |
468 | ||
469 | if (efi_va > prev_va) | |
470 | efi_va -= PMD_SIZE; | |
471 | } | |
472 | ||
473 | if (efi_va < EFI_VA_END) { | |
474 | pr_warn(FW_WARN "VA address range overflow!\n"); | |
475 | return; | |
476 | } | |
477 | ||
478 | /* Do the VA map */ | |
479 | __map_region(md, efi_va); | |
480 | md->virt_addr = efi_va; | |
481 | } | |
482 | ||
3b266496 DY |
483 | /* |
484 | * kexec kernel will use efi_map_region_fixed to map efi runtime memory ranges. | |
485 | * md->virt_addr is the original virtual address which had been mapped in kexec | |
486 | * 1st kernel. | |
487 | */ | |
488 | void __init efi_map_region_fixed(efi_memory_desc_t *md) | |
489 | { | |
0513fe1d | 490 | __map_region(md, md->phys_addr); |
3b266496 DY |
491 | __map_region(md, md->virt_addr); |
492 | } | |
493 | ||
e1ad783b | 494 | void __iomem *__init efi_ioremap(unsigned long phys_addr, unsigned long size, |
3e8fa263 | 495 | u32 type, u64 attribute) |
e1ad783b KP |
496 | { |
497 | unsigned long last_map_pfn; | |
498 | ||
499 | if (type == EFI_MEMORY_MAPPED_IO) | |
500 | return ioremap(phys_addr, size); | |
501 | ||
502 | last_map_pfn = init_memory_mapping(phys_addr, phys_addr + size); | |
503 | if ((last_map_pfn << PAGE_SHIFT) < phys_addr + size) { | |
504 | unsigned long top = last_map_pfn << PAGE_SHIFT; | |
3e8fa263 | 505 | efi_ioremap(top, size - (top - phys_addr), type, attribute); |
e1ad783b KP |
506 | } |
507 | ||
3e8fa263 MF |
508 | if (!(attribute & EFI_MEMORY_WB)) |
509 | efi_memory_uc((u64)(unsigned long)__va(phys_addr), size); | |
510 | ||
e1ad783b KP |
511 | return (void __iomem *)__va(phys_addr); |
512 | } | |
1fec0533 DY |
513 | |
514 | void __init parse_efi_setup(u64 phys_addr, u32 data_len) | |
515 | { | |
516 | efi_setup = phys_addr + sizeof(struct setup_data); | |
1fec0533 | 517 | } |
c55d016f | 518 | |
18141e89 | 519 | static int __init efi_update_mappings(efi_memory_desc_t *md, unsigned long pf) |
c55d016f | 520 | { |
6d0cc887 | 521 | unsigned long pfn; |
3ede3417 | 522 | pgd_t *pgd = efi_mm.pgd; |
18141e89 SP |
523 | int err1, err2; |
524 | ||
525 | /* Update the 1:1 mapping */ | |
526 | pfn = md->phys_addr >> PAGE_SHIFT; | |
527 | err1 = kernel_map_pages_in_pgd(pgd, pfn, md->phys_addr, md->num_pages, pf); | |
528 | if (err1) { | |
529 | pr_err("Error while updating 1:1 mapping PA 0x%llx -> VA 0x%llx!\n", | |
530 | md->phys_addr, md->virt_addr); | |
531 | } | |
532 | ||
533 | err2 = kernel_map_pages_in_pgd(pgd, pfn, md->virt_addr, md->num_pages, pf); | |
534 | if (err2) { | |
535 | pr_err("Error while updating VA mapping PA 0x%llx -> VA 0x%llx!\n", | |
536 | md->phys_addr, md->virt_addr); | |
537 | } | |
538 | ||
539 | return err1 || err2; | |
540 | } | |
541 | ||
542 | static int __init efi_update_mem_attr(struct mm_struct *mm, efi_memory_desc_t *md) | |
543 | { | |
544 | unsigned long pf = 0; | |
545 | ||
546 | if (md->attribute & EFI_MEMORY_XP) | |
547 | pf |= _PAGE_NX; | |
548 | ||
549 | if (!(md->attribute & EFI_MEMORY_RO)) | |
550 | pf |= _PAGE_RW; | |
551 | ||
1379edd5 TL |
552 | if (sev_active()) |
553 | pf |= _PAGE_ENC; | |
554 | ||
18141e89 SP |
555 | return efi_update_mappings(md, pf); |
556 | } | |
557 | ||
558 | void __init efi_runtime_update_mappings(void) | |
559 | { | |
6d0cc887 | 560 | efi_memory_desc_t *md; |
6d0cc887 SP |
561 | |
562 | if (efi_enabled(EFI_OLD_MEMMAP)) { | |
563 | if (__supported_pte_mask & _PAGE_NX) | |
564 | runtime_code_page_mkexec(); | |
565 | return; | |
566 | } | |
567 | ||
18141e89 SP |
568 | /* |
569 | * Use the EFI Memory Attribute Table for mapping permissions if it | |
570 | * exists, since it is intended to supersede EFI_PROPERTIES_TABLE. | |
571 | */ | |
572 | if (efi_enabled(EFI_MEM_ATTR)) { | |
573 | efi_memattr_apply_permissions(NULL, efi_update_mem_attr); | |
574 | return; | |
575 | } | |
576 | ||
577 | /* | |
578 | * EFI_MEMORY_ATTRIBUTES_TABLE is intended to replace | |
579 | * EFI_PROPERTIES_TABLE. So, use EFI_PROPERTIES_TABLE to update | |
580 | * permissions only if EFI_MEMORY_ATTRIBUTES_TABLE is not | |
581 | * published by the firmware. Even if we find a buggy implementation of | |
582 | * EFI_MEMORY_ATTRIBUTES_TABLE, don't fall back to | |
583 | * EFI_PROPERTIES_TABLE, because of the same reason. | |
584 | */ | |
585 | ||
6d0cc887 | 586 | if (!efi_enabled(EFI_NX_PE_DATA)) |
c55d016f BP |
587 | return; |
588 | ||
78ce248f | 589 | for_each_efi_memory_desc(md) { |
6d0cc887 | 590 | unsigned long pf = 0; |
6d0cc887 SP |
591 | |
592 | if (!(md->attribute & EFI_MEMORY_RUNTIME)) | |
593 | continue; | |
594 | ||
595 | if (!(md->attribute & EFI_MEMORY_WB)) | |
596 | pf |= _PAGE_PCD; | |
597 | ||
598 | if ((md->attribute & EFI_MEMORY_XP) || | |
599 | (md->type == EFI_RUNTIME_SERVICES_DATA)) | |
600 | pf |= _PAGE_NX; | |
601 | ||
602 | if (!(md->attribute & EFI_MEMORY_RO) && | |
603 | (md->type != EFI_RUNTIME_SERVICES_CODE)) | |
604 | pf |= _PAGE_RW; | |
605 | ||
1379edd5 TL |
606 | if (sev_active()) |
607 | pf |= _PAGE_ENC; | |
608 | ||
18141e89 | 609 | efi_update_mappings(md, pf); |
6d0cc887 | 610 | } |
c55d016f | 611 | } |
11cc8512 BP |
612 | |
613 | void __init efi_dump_pagetable(void) | |
614 | { | |
615 | #ifdef CONFIG_EFI_PGT_DUMP | |
ac81d3de SP |
616 | if (efi_enabled(EFI_OLD_MEMMAP)) |
617 | ptdump_walk_pgd_level(NULL, swapper_pg_dir); | |
618 | else | |
3ede3417 | 619 | ptdump_walk_pgd_level(NULL, efi_mm.pgd); |
11cc8512 BP |
620 | #endif |
621 | } | |
994448f1 | 622 | |
03781e40 SP |
623 | /* |
624 | * Makes the calling thread switch to/from efi_mm context. Can be used | |
4eda1117 SAS |
625 | * in a kernel thread and user context. Preemption needs to remain disabled |
626 | * while the EFI-mm is borrowed. mmgrab()/mmdrop() is not used because the mm | |
627 | * can not change under us. | |
628 | * It should be ensured that there are no concurent calls to this function. | |
03781e40 SP |
629 | */ |
630 | void efi_switch_mm(struct mm_struct *mm) | |
631 | { | |
03781e40 SP |
632 | efi_scratch.prev_mm = current->active_mm; |
633 | current->active_mm = mm; | |
634 | switch_mm(efi_scratch.prev_mm, mm, NULL); | |
03781e40 SP |
635 | } |
636 | ||
4f9dbcfc MF |
637 | #ifdef CONFIG_EFI_MIXED |
638 | extern efi_status_t efi64_thunk(u32, ...); | |
639 | ||
83a0a2ea AB |
640 | static DEFINE_SPINLOCK(efi_runtime_lock); |
641 | ||
4f9dbcfc MF |
642 | #define runtime_service32(func) \ |
643 | ({ \ | |
644 | u32 table = (u32)(unsigned long)efi.systab; \ | |
645 | u32 *rt, *___f; \ | |
646 | \ | |
647 | rt = (u32 *)(table + offsetof(efi_system_table_32_t, runtime)); \ | |
648 | ___f = (u32 *)(*rt + offsetof(efi_runtime_services_32_t, func)); \ | |
649 | *___f; \ | |
650 | }) | |
651 | ||
652 | /* | |
653 | * Switch to the EFI page tables early so that we can access the 1:1 | |
654 | * runtime services mappings which are not mapped in any other page | |
655 | * tables. This function must be called before runtime_service32(). | |
656 | * | |
657 | * Also, disable interrupts because the IDT points to 64-bit handlers, | |
658 | * which aren't going to function correctly when we switch to 32-bit. | |
659 | */ | |
660 | #define efi_thunk(f, ...) \ | |
661 | ({ \ | |
662 | efi_status_t __s; \ | |
21f86625 | 663 | u32 __func; \ |
4f9dbcfc | 664 | \ |
21f86625 | 665 | arch_efi_call_virt_setup(); \ |
4f9dbcfc | 666 | \ |
21f86625 AT |
667 | __func = runtime_service32(f); \ |
668 | __s = efi64_thunk(__func, __VA_ARGS__); \ | |
4f9dbcfc | 669 | \ |
21f86625 | 670 | arch_efi_call_virt_teardown(); \ |
4f9dbcfc MF |
671 | \ |
672 | __s; \ | |
673 | }) | |
674 | ||
675 | efi_status_t efi_thunk_set_virtual_address_map( | |
676 | void *phys_set_virtual_address_map, | |
677 | unsigned long memory_map_size, | |
678 | unsigned long descriptor_size, | |
679 | u32 descriptor_version, | |
680 | efi_memory_desc_t *virtual_map) | |
681 | { | |
682 | efi_status_t status; | |
683 | unsigned long flags; | |
684 | u32 func; | |
685 | ||
686 | efi_sync_low_kernel_mappings(); | |
687 | local_irq_save(flags); | |
688 | ||
03781e40 | 689 | efi_switch_mm(&efi_mm); |
4f9dbcfc MF |
690 | |
691 | func = (u32)(unsigned long)phys_set_virtual_address_map; | |
692 | status = efi64_thunk(func, memory_map_size, descriptor_size, | |
693 | descriptor_version, virtual_map); | |
694 | ||
03781e40 | 695 | efi_switch_mm(efi_scratch.prev_mm); |
4f9dbcfc MF |
696 | local_irq_restore(flags); |
697 | ||
698 | return status; | |
699 | } | |
700 | ||
701 | static efi_status_t efi_thunk_get_time(efi_time_t *tm, efi_time_cap_t *tc) | |
702 | { | |
703 | efi_status_t status; | |
704 | u32 phys_tm, phys_tc; | |
83a0a2ea | 705 | unsigned long flags; |
4f9dbcfc MF |
706 | |
707 | spin_lock(&rtc_lock); | |
83a0a2ea | 708 | spin_lock_irqsave(&efi_runtime_lock, flags); |
4f9dbcfc | 709 | |
f6697df3 MF |
710 | phys_tm = virt_to_phys_or_null(tm); |
711 | phys_tc = virt_to_phys_or_null(tc); | |
4f9dbcfc MF |
712 | |
713 | status = efi_thunk(get_time, phys_tm, phys_tc); | |
714 | ||
83a0a2ea | 715 | spin_unlock_irqrestore(&efi_runtime_lock, flags); |
4f9dbcfc MF |
716 | spin_unlock(&rtc_lock); |
717 | ||
718 | return status; | |
719 | } | |
720 | ||
721 | static efi_status_t efi_thunk_set_time(efi_time_t *tm) | |
722 | { | |
723 | efi_status_t status; | |
724 | u32 phys_tm; | |
83a0a2ea | 725 | unsigned long flags; |
4f9dbcfc MF |
726 | |
727 | spin_lock(&rtc_lock); | |
83a0a2ea | 728 | spin_lock_irqsave(&efi_runtime_lock, flags); |
4f9dbcfc | 729 | |
f6697df3 | 730 | phys_tm = virt_to_phys_or_null(tm); |
4f9dbcfc MF |
731 | |
732 | status = efi_thunk(set_time, phys_tm); | |
733 | ||
83a0a2ea | 734 | spin_unlock_irqrestore(&efi_runtime_lock, flags); |
4f9dbcfc MF |
735 | spin_unlock(&rtc_lock); |
736 | ||
737 | return status; | |
738 | } | |
739 | ||
740 | static efi_status_t | |
741 | efi_thunk_get_wakeup_time(efi_bool_t *enabled, efi_bool_t *pending, | |
742 | efi_time_t *tm) | |
743 | { | |
744 | efi_status_t status; | |
745 | u32 phys_enabled, phys_pending, phys_tm; | |
83a0a2ea | 746 | unsigned long flags; |
4f9dbcfc MF |
747 | |
748 | spin_lock(&rtc_lock); | |
83a0a2ea | 749 | spin_lock_irqsave(&efi_runtime_lock, flags); |
4f9dbcfc | 750 | |
f6697df3 MF |
751 | phys_enabled = virt_to_phys_or_null(enabled); |
752 | phys_pending = virt_to_phys_or_null(pending); | |
753 | phys_tm = virt_to_phys_or_null(tm); | |
4f9dbcfc MF |
754 | |
755 | status = efi_thunk(get_wakeup_time, phys_enabled, | |
756 | phys_pending, phys_tm); | |
757 | ||
83a0a2ea | 758 | spin_unlock_irqrestore(&efi_runtime_lock, flags); |
4f9dbcfc MF |
759 | spin_unlock(&rtc_lock); |
760 | ||
761 | return status; | |
762 | } | |
763 | ||
764 | static efi_status_t | |
765 | efi_thunk_set_wakeup_time(efi_bool_t enabled, efi_time_t *tm) | |
766 | { | |
767 | efi_status_t status; | |
768 | u32 phys_tm; | |
83a0a2ea | 769 | unsigned long flags; |
4f9dbcfc MF |
770 | |
771 | spin_lock(&rtc_lock); | |
83a0a2ea | 772 | spin_lock_irqsave(&efi_runtime_lock, flags); |
4f9dbcfc | 773 | |
f6697df3 | 774 | phys_tm = virt_to_phys_or_null(tm); |
4f9dbcfc MF |
775 | |
776 | status = efi_thunk(set_wakeup_time, enabled, phys_tm); | |
777 | ||
83a0a2ea | 778 | spin_unlock_irqrestore(&efi_runtime_lock, flags); |
4f9dbcfc MF |
779 | spin_unlock(&rtc_lock); |
780 | ||
781 | return status; | |
782 | } | |
783 | ||
f6697df3 MF |
784 | static unsigned long efi_name_size(efi_char16_t *name) |
785 | { | |
786 | return ucs2_strsize(name, EFI_VAR_NAME_LEN) + 1; | |
787 | } | |
4f9dbcfc MF |
788 | |
789 | static efi_status_t | |
790 | efi_thunk_get_variable(efi_char16_t *name, efi_guid_t *vendor, | |
791 | u32 *attr, unsigned long *data_size, void *data) | |
792 | { | |
793 | efi_status_t status; | |
794 | u32 phys_name, phys_vendor, phys_attr; | |
795 | u32 phys_data_size, phys_data; | |
83a0a2ea AB |
796 | unsigned long flags; |
797 | ||
798 | spin_lock_irqsave(&efi_runtime_lock, flags); | |
4f9dbcfc | 799 | |
f6697df3 MF |
800 | phys_data_size = virt_to_phys_or_null(data_size); |
801 | phys_vendor = virt_to_phys_or_null(vendor); | |
802 | phys_name = virt_to_phys_or_null_size(name, efi_name_size(name)); | |
803 | phys_attr = virt_to_phys_or_null(attr); | |
804 | phys_data = virt_to_phys_or_null_size(data, *data_size); | |
4f9dbcfc MF |
805 | |
806 | status = efi_thunk(get_variable, phys_name, phys_vendor, | |
807 | phys_attr, phys_data_size, phys_data); | |
808 | ||
83a0a2ea AB |
809 | spin_unlock_irqrestore(&efi_runtime_lock, flags); |
810 | ||
4f9dbcfc MF |
811 | return status; |
812 | } | |
813 | ||
814 | static efi_status_t | |
815 | efi_thunk_set_variable(efi_char16_t *name, efi_guid_t *vendor, | |
816 | u32 attr, unsigned long data_size, void *data) | |
817 | { | |
818 | u32 phys_name, phys_vendor, phys_data; | |
819 | efi_status_t status; | |
83a0a2ea AB |
820 | unsigned long flags; |
821 | ||
822 | spin_lock_irqsave(&efi_runtime_lock, flags); | |
823 | ||
824 | phys_name = virt_to_phys_or_null_size(name, efi_name_size(name)); | |
825 | phys_vendor = virt_to_phys_or_null(vendor); | |
826 | phys_data = virt_to_phys_or_null_size(data, data_size); | |
827 | ||
828 | /* If data_size is > sizeof(u32) we've got problems */ | |
829 | status = efi_thunk(set_variable, phys_name, phys_vendor, | |
830 | attr, data_size, phys_data); | |
831 | ||
832 | spin_unlock_irqrestore(&efi_runtime_lock, flags); | |
833 | ||
834 | return status; | |
835 | } | |
836 | ||
837 | static efi_status_t | |
838 | efi_thunk_set_variable_nonblocking(efi_char16_t *name, efi_guid_t *vendor, | |
839 | u32 attr, unsigned long data_size, | |
840 | void *data) | |
841 | { | |
842 | u32 phys_name, phys_vendor, phys_data; | |
843 | efi_status_t status; | |
844 | unsigned long flags; | |
845 | ||
846 | if (!spin_trylock_irqsave(&efi_runtime_lock, flags)) | |
847 | return EFI_NOT_READY; | |
4f9dbcfc | 848 | |
f6697df3 MF |
849 | phys_name = virt_to_phys_or_null_size(name, efi_name_size(name)); |
850 | phys_vendor = virt_to_phys_or_null(vendor); | |
851 | phys_data = virt_to_phys_or_null_size(data, data_size); | |
4f9dbcfc MF |
852 | |
853 | /* If data_size is > sizeof(u32) we've got problems */ | |
854 | status = efi_thunk(set_variable, phys_name, phys_vendor, | |
855 | attr, data_size, phys_data); | |
856 | ||
83a0a2ea AB |
857 | spin_unlock_irqrestore(&efi_runtime_lock, flags); |
858 | ||
4f9dbcfc MF |
859 | return status; |
860 | } | |
861 | ||
862 | static efi_status_t | |
863 | efi_thunk_get_next_variable(unsigned long *name_size, | |
864 | efi_char16_t *name, | |
865 | efi_guid_t *vendor) | |
866 | { | |
867 | efi_status_t status; | |
868 | u32 phys_name_size, phys_name, phys_vendor; | |
83a0a2ea AB |
869 | unsigned long flags; |
870 | ||
871 | spin_lock_irqsave(&efi_runtime_lock, flags); | |
4f9dbcfc | 872 | |
f6697df3 MF |
873 | phys_name_size = virt_to_phys_or_null(name_size); |
874 | phys_vendor = virt_to_phys_or_null(vendor); | |
875 | phys_name = virt_to_phys_or_null_size(name, *name_size); | |
4f9dbcfc MF |
876 | |
877 | status = efi_thunk(get_next_variable, phys_name_size, | |
878 | phys_name, phys_vendor); | |
879 | ||
83a0a2ea AB |
880 | spin_unlock_irqrestore(&efi_runtime_lock, flags); |
881 | ||
4f9dbcfc MF |
882 | return status; |
883 | } | |
884 | ||
885 | static efi_status_t | |
886 | efi_thunk_get_next_high_mono_count(u32 *count) | |
887 | { | |
888 | efi_status_t status; | |
889 | u32 phys_count; | |
83a0a2ea AB |
890 | unsigned long flags; |
891 | ||
892 | spin_lock_irqsave(&efi_runtime_lock, flags); | |
4f9dbcfc | 893 | |
f6697df3 | 894 | phys_count = virt_to_phys_or_null(count); |
4f9dbcfc MF |
895 | status = efi_thunk(get_next_high_mono_count, phys_count); |
896 | ||
83a0a2ea AB |
897 | spin_unlock_irqrestore(&efi_runtime_lock, flags); |
898 | ||
4f9dbcfc MF |
899 | return status; |
900 | } | |
901 | ||
902 | static void | |
903 | efi_thunk_reset_system(int reset_type, efi_status_t status, | |
904 | unsigned long data_size, efi_char16_t *data) | |
905 | { | |
906 | u32 phys_data; | |
83a0a2ea AB |
907 | unsigned long flags; |
908 | ||
909 | spin_lock_irqsave(&efi_runtime_lock, flags); | |
4f9dbcfc | 910 | |
f6697df3 | 911 | phys_data = virt_to_phys_or_null_size(data, data_size); |
4f9dbcfc MF |
912 | |
913 | efi_thunk(reset_system, reset_type, status, data_size, phys_data); | |
83a0a2ea AB |
914 | |
915 | spin_unlock_irqrestore(&efi_runtime_lock, flags); | |
4f9dbcfc MF |
916 | } |
917 | ||
918 | static efi_status_t | |
919 | efi_thunk_update_capsule(efi_capsule_header_t **capsules, | |
920 | unsigned long count, unsigned long sg_list) | |
921 | { | |
922 | /* | |
923 | * To properly support this function we would need to repackage | |
924 | * 'capsules' because the firmware doesn't understand 64-bit | |
925 | * pointers. | |
926 | */ | |
927 | return EFI_UNSUPPORTED; | |
928 | } | |
929 | ||
930 | static efi_status_t | |
931 | efi_thunk_query_variable_info(u32 attr, u64 *storage_space, | |
932 | u64 *remaining_space, | |
933 | u64 *max_variable_size) | |
934 | { | |
935 | efi_status_t status; | |
936 | u32 phys_storage, phys_remaining, phys_max; | |
83a0a2ea | 937 | unsigned long flags; |
4f9dbcfc MF |
938 | |
939 | if (efi.runtime_version < EFI_2_00_SYSTEM_TABLE_REVISION) | |
940 | return EFI_UNSUPPORTED; | |
941 | ||
83a0a2ea AB |
942 | spin_lock_irqsave(&efi_runtime_lock, flags); |
943 | ||
f6697df3 MF |
944 | phys_storage = virt_to_phys_or_null(storage_space); |
945 | phys_remaining = virt_to_phys_or_null(remaining_space); | |
946 | phys_max = virt_to_phys_or_null(max_variable_size); | |
4f9dbcfc | 947 | |
9a11040f | 948 | status = efi_thunk(query_variable_info, attr, phys_storage, |
4f9dbcfc MF |
949 | phys_remaining, phys_max); |
950 | ||
83a0a2ea AB |
951 | spin_unlock_irqrestore(&efi_runtime_lock, flags); |
952 | ||
953 | return status; | |
954 | } | |
955 | ||
956 | static efi_status_t | |
957 | efi_thunk_query_variable_info_nonblocking(u32 attr, u64 *storage_space, | |
958 | u64 *remaining_space, | |
959 | u64 *max_variable_size) | |
960 | { | |
961 | efi_status_t status; | |
962 | u32 phys_storage, phys_remaining, phys_max; | |
963 | unsigned long flags; | |
964 | ||
965 | if (efi.runtime_version < EFI_2_00_SYSTEM_TABLE_REVISION) | |
966 | return EFI_UNSUPPORTED; | |
967 | ||
968 | if (!spin_trylock_irqsave(&efi_runtime_lock, flags)) | |
969 | return EFI_NOT_READY; | |
970 | ||
971 | phys_storage = virt_to_phys_or_null(storage_space); | |
972 | phys_remaining = virt_to_phys_or_null(remaining_space); | |
973 | phys_max = virt_to_phys_or_null(max_variable_size); | |
974 | ||
975 | status = efi_thunk(query_variable_info, attr, phys_storage, | |
976 | phys_remaining, phys_max); | |
977 | ||
978 | spin_unlock_irqrestore(&efi_runtime_lock, flags); | |
979 | ||
4f9dbcfc MF |
980 | return status; |
981 | } | |
982 | ||
983 | static efi_status_t | |
984 | efi_thunk_query_capsule_caps(efi_capsule_header_t **capsules, | |
985 | unsigned long count, u64 *max_size, | |
986 | int *reset_type) | |
987 | { | |
988 | /* | |
989 | * To properly support this function we would need to repackage | |
990 | * 'capsules' because the firmware doesn't understand 64-bit | |
991 | * pointers. | |
992 | */ | |
993 | return EFI_UNSUPPORTED; | |
994 | } | |
995 | ||
996 | void efi_thunk_runtime_setup(void) | |
997 | { | |
998 | efi.get_time = efi_thunk_get_time; | |
999 | efi.set_time = efi_thunk_set_time; | |
1000 | efi.get_wakeup_time = efi_thunk_get_wakeup_time; | |
1001 | efi.set_wakeup_time = efi_thunk_set_wakeup_time; | |
1002 | efi.get_variable = efi_thunk_get_variable; | |
1003 | efi.get_next_variable = efi_thunk_get_next_variable; | |
1004 | efi.set_variable = efi_thunk_set_variable; | |
83a0a2ea | 1005 | efi.set_variable_nonblocking = efi_thunk_set_variable_nonblocking; |
4f9dbcfc MF |
1006 | efi.get_next_high_mono_count = efi_thunk_get_next_high_mono_count; |
1007 | efi.reset_system = efi_thunk_reset_system; | |
1008 | efi.query_variable_info = efi_thunk_query_variable_info; | |
83a0a2ea | 1009 | efi.query_variable_info_nonblocking = efi_thunk_query_variable_info_nonblocking; |
4f9dbcfc MF |
1010 | efi.update_capsule = efi_thunk_update_capsule; |
1011 | efi.query_capsule_caps = efi_thunk_query_capsule_caps; | |
1012 | } | |
1013 | #endif /* CONFIG_EFI_MIXED */ |