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97873a3d | 1 | // SPDX-License-Identifier: GPL-2.0-only |
b84a64fa | 2 | |
291f3632 MF |
3 | /* ----------------------------------------------------------------------- |
4 | * | |
5 | * Copyright 2011 Intel Corporation; author Matt Fleming | |
6 | * | |
291f3632 MF |
7 | * ----------------------------------------------------------------------- */ |
8 | ||
9 | #include <linux/efi.h> | |
dd5fc854 | 10 | #include <linux/pci.h> |
59476f80 | 11 | #include <linux/stddef.h> |
5520b7e7 | 12 | |
291f3632 | 13 | #include <asm/efi.h> |
5520b7e7 | 14 | #include <asm/e820/types.h> |
291f3632 MF |
15 | #include <asm/setup.h> |
16 | #include <asm/desc.h> | |
220dd769 | 17 | #include <asm/boot.h> |
a1b87d54 | 18 | #include <asm/kaslr.h> |
31c77a50 | 19 | #include <asm/sev.h> |
291f3632 | 20 | |
c2d0b470 | 21 | #include "efistub.h" |
cb1c9e02 | 22 | #include "x86-stub.h" |
291f3632 | 23 | |
b3810c5a AB |
24 | extern char _bss[], _ebss[]; |
25 | ||
ccc27ae7 | 26 | const efi_system_table_t *efi_system_table; |
3ba75c13 | 27 | const efi_dxe_services_table_t *efi_dxe_table; |
987053a3 | 28 | static efi_loaded_image_t *image = NULL; |
11078876 | 29 | static efi_memory_attribute_protocol_t *memattr; |
204b0a1a | 30 | |
c0461bd1 DG |
31 | typedef union sev_memory_acceptance_protocol sev_memory_acceptance_protocol_t; |
32 | union sev_memory_acceptance_protocol { | |
33 | struct { | |
34 | efi_status_t (__efiapi * allow_unaccepted_memory)( | |
35 | sev_memory_acceptance_protocol_t *); | |
36 | }; | |
37 | struct { | |
38 | u32 allow_unaccepted_memory; | |
39 | } mixed_mode; | |
40 | }; | |
41 | ||
c116e8d6 | 42 | static efi_status_t |
75c5a713 | 43 | preserve_pci_rom_image(efi_pci_io_protocol_t *pci, struct pci_setup_rom **__rom) |
dd5fc854 | 44 | { |
c116e8d6 | 45 | struct pci_setup_rom *rom = NULL; |
dd5fc854 | 46 | efi_status_t status; |
c116e8d6 | 47 | unsigned long size; |
e2967018 | 48 | uint64_t romsize; |
2c3625cb | 49 | void *romimage; |
dd5fc854 | 50 | |
1de3a1be | 51 | /* |
e2967018 AB |
52 | * Some firmware images contain EFI function pointers at the place where |
53 | * the romimage and romsize fields are supposed to be. Typically the EFI | |
1de3a1be HG |
54 | * code is mapped at high addresses, translating to an unrealistically |
55 | * large romsize. The UEFI spec limits the size of option ROMs to 16 | |
56 | * MiB so we reject any ROMs over 16 MiB in size to catch this. | |
57 | */ | |
99ea8b1d AB |
58 | romimage = efi_table_attr(pci, romimage); |
59 | romsize = efi_table_attr(pci, romsize); | |
1de3a1be | 60 | if (!romimage || !romsize || romsize > SZ_16M) |
c116e8d6 | 61 | return EFI_INVALID_PARAMETER; |
dd5fc854 | 62 | |
2c3625cb | 63 | size = romsize + sizeof(*rom); |
dd5fc854 | 64 | |
966291f6 AB |
65 | status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, size, |
66 | (void **)&rom); | |
77e21e87 | 67 | if (status != EFI_SUCCESS) { |
36bdd0a7 | 68 | efi_err("Failed to allocate memory for 'rom'\n"); |
c116e8d6 | 69 | return status; |
77e21e87 | 70 | } |
dd5fc854 | 71 | |
c116e8d6 MF |
72 | memset(rom, 0, sizeof(*rom)); |
73 | ||
90a2186b IM |
74 | rom->data.type = SETUP_PCI; |
75 | rom->data.len = size - sizeof(struct setup_data); | |
76 | rom->data.next = 0; | |
8b94da92 | 77 | rom->pcilen = romsize; |
c116e8d6 MF |
78 | *__rom = rom; |
79 | ||
47c0fd39 AB |
80 | status = efi_call_proto(pci, pci.read, EfiPciIoWidthUint16, |
81 | PCI_VENDOR_ID, 1, &rom->vendor); | |
dd5fc854 | 82 | |
77e21e87 | 83 | if (status != EFI_SUCCESS) { |
36bdd0a7 | 84 | efi_err("Failed to read rom->vendor\n"); |
c116e8d6 | 85 | goto free_struct; |
77e21e87 | 86 | } |
c116e8d6 | 87 | |
47c0fd39 AB |
88 | status = efi_call_proto(pci, pci.read, EfiPciIoWidthUint16, |
89 | PCI_DEVICE_ID, 1, &rom->devid); | |
c116e8d6 | 90 | |
77e21e87 | 91 | if (status != EFI_SUCCESS) { |
36bdd0a7 | 92 | efi_err("Failed to read rom->devid\n"); |
c116e8d6 | 93 | goto free_struct; |
77e21e87 | 94 | } |
c116e8d6 | 95 | |
47c0fd39 AB |
96 | status = efi_call_proto(pci, get_location, &rom->segment, &rom->bus, |
97 | &rom->device, &rom->function); | |
c116e8d6 MF |
98 | |
99 | if (status != EFI_SUCCESS) | |
100 | goto free_struct; | |
101 | ||
2c3625cb | 102 | memcpy(rom->romdata, romimage, romsize); |
c116e8d6 MF |
103 | return status; |
104 | ||
105 | free_struct: | |
966291f6 | 106 | efi_bs_call(free_pool, rom); |
c116e8d6 MF |
107 | return status; |
108 | } | |
109 | ||
56394ab8 MF |
110 | /* |
111 | * There's no way to return an informative status from this function, | |
112 | * because any analysis (and printing of error messages) needs to be | |
113 | * done directly at the EFI function call-site. | |
114 | * | |
115 | * For example, EFI_INVALID_PARAMETER could indicate a bug or maybe we | |
116 | * just didn't find any PCI devices, but there's no way to tell outside | |
117 | * the context of the call. | |
118 | */ | |
119 | static void setup_efi_pci(struct boot_params *params) | |
291f3632 | 120 | { |
291f3632 | 121 | efi_status_t status; |
c116e8d6 MF |
122 | void **pci_handle = NULL; |
123 | efi_guid_t pci_proto = EFI_PCI_IO_PROTOCOL_GUID; | |
124 | unsigned long size = 0; | |
75c5a713 | 125 | struct setup_data *data; |
2732ea0d | 126 | efi_handle_t h; |
75c5a713 | 127 | int i; |
291f3632 | 128 | |
966291f6 AB |
129 | status = efi_bs_call(locate_handle, EFI_LOCATE_BY_PROTOCOL, |
130 | &pci_proto, NULL, &size, pci_handle); | |
291f3632 | 131 | |
c116e8d6 | 132 | if (status == EFI_BUFFER_TOO_SMALL) { |
966291f6 AB |
133 | status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, size, |
134 | (void **)&pci_handle); | |
291f3632 | 135 | |
77e21e87 | 136 | if (status != EFI_SUCCESS) { |
36bdd0a7 | 137 | efi_err("Failed to allocate memory for 'pci_handle'\n"); |
56394ab8 | 138 | return; |
77e21e87 | 139 | } |
291f3632 | 140 | |
966291f6 AB |
141 | status = efi_bs_call(locate_handle, EFI_LOCATE_BY_PROTOCOL, |
142 | &pci_proto, NULL, &size, pci_handle); | |
291f3632 MF |
143 | } |
144 | ||
c116e8d6 | 145 | if (status != EFI_SUCCESS) |
291f3632 MF |
146 | goto free_handle; |
147 | ||
75c5a713 AB |
148 | data = (struct setup_data *)(unsigned long)params->hdr.setup_data; |
149 | ||
150 | while (data && data->next) | |
151 | data = (struct setup_data *)(unsigned long)data->next; | |
152 | ||
2732ea0d | 153 | for_each_efi_handle(h, pci_handle, size, i) { |
75c5a713 AB |
154 | efi_pci_io_protocol_t *pci = NULL; |
155 | struct pci_setup_rom *rom; | |
156 | ||
966291f6 AB |
157 | status = efi_bs_call(handle_protocol, h, &pci_proto, |
158 | (void **)&pci); | |
75c5a713 AB |
159 | if (status != EFI_SUCCESS || !pci) |
160 | continue; | |
161 | ||
162 | status = preserve_pci_rom_image(pci, &rom); | |
163 | if (status != EFI_SUCCESS) | |
164 | continue; | |
165 | ||
166 | if (data) | |
167 | data->next = (unsigned long)rom; | |
168 | else | |
169 | params->hdr.setup_data = (unsigned long)rom; | |
170 | ||
171 | data = (struct setup_data *)rom; | |
172 | } | |
291f3632 | 173 | |
c116e8d6 | 174 | free_handle: |
966291f6 | 175 | efi_bs_call(free_pool, pci_handle); |
c116e8d6 | 176 | } |
291f3632 | 177 | |
58c5475a LW |
178 | static void retrieve_apple_device_properties(struct boot_params *boot_params) |
179 | { | |
180 | efi_guid_t guid = APPLE_PROPERTIES_PROTOCOL_GUID; | |
181 | struct setup_data *data, *new; | |
182 | efi_status_t status; | |
183 | u32 size = 0; | |
960a8d01 | 184 | apple_properties_protocol_t *p; |
58c5475a | 185 | |
966291f6 | 186 | status = efi_bs_call(locate_protocol, &guid, NULL, (void **)&p); |
58c5475a LW |
187 | if (status != EFI_SUCCESS) |
188 | return; | |
189 | ||
99ea8b1d | 190 | if (efi_table_attr(p, version) != 0x10000) { |
36bdd0a7 | 191 | efi_err("Unsupported properties proto version\n"); |
58c5475a LW |
192 | return; |
193 | } | |
194 | ||
47c0fd39 | 195 | efi_call_proto(p, get_all, NULL, &size); |
58c5475a LW |
196 | if (!size) |
197 | return; | |
198 | ||
199 | do { | |
966291f6 AB |
200 | status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, |
201 | size + sizeof(struct setup_data), | |
202 | (void **)&new); | |
58c5475a | 203 | if (status != EFI_SUCCESS) { |
36bdd0a7 | 204 | efi_err("Failed to allocate memory for 'properties'\n"); |
58c5475a LW |
205 | return; |
206 | } | |
207 | ||
47c0fd39 | 208 | status = efi_call_proto(p, get_all, new->data, &size); |
58c5475a LW |
209 | |
210 | if (status == EFI_BUFFER_TOO_SMALL) | |
966291f6 | 211 | efi_bs_call(free_pool, new); |
58c5475a LW |
212 | } while (status == EFI_BUFFER_TOO_SMALL); |
213 | ||
214 | new->type = SETUP_APPLE_PROPERTIES; | |
215 | new->len = size; | |
216 | new->next = 0; | |
217 | ||
218 | data = (struct setup_data *)(unsigned long)boot_params->hdr.setup_data; | |
90a2186b | 219 | if (!data) { |
58c5475a | 220 | boot_params->hdr.setup_data = (unsigned long)new; |
90a2186b | 221 | } else { |
58c5475a LW |
222 | while (data->next) |
223 | data = (struct setup_data *)(unsigned long)data->next; | |
224 | data->next = (unsigned long)new; | |
225 | } | |
226 | } | |
227 | ||
a7a6a01f AB |
228 | efi_status_t efi_adjust_memory_range_protection(unsigned long start, |
229 | unsigned long size) | |
82e0d6d7 BE |
230 | { |
231 | efi_status_t status; | |
232 | efi_gcd_memory_space_desc_t desc; | |
233 | unsigned long end, next; | |
234 | unsigned long rounded_start, rounded_end; | |
235 | unsigned long unprotect_start, unprotect_size; | |
82e0d6d7 | 236 | |
82e0d6d7 BE |
237 | rounded_start = rounddown(start, EFI_PAGE_SIZE); |
238 | rounded_end = roundup(start + size, EFI_PAGE_SIZE); | |
239 | ||
11078876 | 240 | if (memattr != NULL) { |
9c554610 AB |
241 | status = efi_call_proto(memattr, set_memory_attributes, |
242 | rounded_start, | |
243 | rounded_end - rounded_start, | |
244 | EFI_MEMORY_RO); | |
245 | if (status != EFI_SUCCESS) { | |
246 | efi_warn("Failed to set EFI_MEMORY_RO attribute\n"); | |
247 | return status; | |
248 | } | |
249 | ||
a7a6a01f AB |
250 | status = efi_call_proto(memattr, clear_memory_attributes, |
251 | rounded_start, | |
252 | rounded_end - rounded_start, | |
253 | EFI_MEMORY_XP); | |
254 | if (status != EFI_SUCCESS) | |
255 | efi_warn("Failed to clear EFI_MEMORY_XP attribute\n"); | |
256 | return status; | |
11078876 AB |
257 | } |
258 | ||
259 | if (efi_dxe_table == NULL) | |
a7a6a01f | 260 | return EFI_SUCCESS; |
11078876 | 261 | |
82e0d6d7 BE |
262 | /* |
263 | * Don't modify memory region attributes, they are | |
264 | * already suitable, to lower the possibility to | |
265 | * encounter firmware bugs. | |
266 | */ | |
267 | ||
268 | for (end = start + size; start < end; start = next) { | |
269 | ||
270 | status = efi_dxe_call(get_memory_space_descriptor, start, &desc); | |
271 | ||
272 | if (status != EFI_SUCCESS) | |
a7a6a01f | 273 | break; |
82e0d6d7 BE |
274 | |
275 | next = desc.base_address + desc.length; | |
276 | ||
277 | /* | |
278 | * Only system memory is suitable for trampoline/kernel image placement, | |
279 | * so only this type of memory needs its attributes to be modified. | |
280 | */ | |
281 | ||
282 | if (desc.gcd_memory_type != EfiGcdMemoryTypeSystemMemory || | |
283 | (desc.attributes & (EFI_MEMORY_RO | EFI_MEMORY_XP)) == 0) | |
284 | continue; | |
285 | ||
286 | unprotect_start = max(rounded_start, (unsigned long)desc.base_address); | |
287 | unprotect_size = min(rounded_end, next) - unprotect_start; | |
288 | ||
289 | status = efi_dxe_call(set_memory_space_attributes, | |
290 | unprotect_start, unprotect_size, | |
291 | EFI_MEMORY_WB); | |
292 | ||
293 | if (status != EFI_SUCCESS) { | |
31f1a0ed | 294 | efi_warn("Unable to unprotect memory range [%08lx,%08lx]: %lx\n", |
82e0d6d7 BE |
295 | unprotect_start, |
296 | unprotect_start + unprotect_size, | |
31f1a0ed | 297 | status); |
a7a6a01f | 298 | break; |
82e0d6d7 BE |
299 | } |
300 | } | |
a7a6a01f | 301 | return EFI_SUCCESS; |
82e0d6d7 BE |
302 | } |
303 | ||
c0461bd1 DG |
304 | static void setup_unaccepted_memory(void) |
305 | { | |
306 | efi_guid_t mem_acceptance_proto = OVMF_SEV_MEMORY_ACCEPTANCE_PROTOCOL_GUID; | |
307 | sev_memory_acceptance_protocol_t *proto; | |
308 | efi_status_t status; | |
309 | ||
310 | if (!IS_ENABLED(CONFIG_UNACCEPTED_MEMORY)) | |
311 | return; | |
312 | ||
313 | /* | |
314 | * Enable unaccepted memory before calling exit boot services in order | |
315 | * for the UEFI to not accept all memory on EBS. | |
316 | */ | |
317 | status = efi_bs_call(locate_protocol, &mem_acceptance_proto, NULL, | |
318 | (void **)&proto); | |
319 | if (status != EFI_SUCCESS) | |
320 | return; | |
321 | ||
322 | status = efi_call_proto(proto, allow_unaccepted_memory); | |
323 | if (status != EFI_SUCCESS) | |
324 | efi_err("Memory acceptance protocol failed\n"); | |
325 | } | |
326 | ||
50d7cdf7 AB |
327 | static efi_char16_t *efistub_fw_vendor(void) |
328 | { | |
329 | unsigned long vendor = efi_table_attr(efi_system_table, fw_vendor); | |
330 | ||
331 | return (efi_char16_t *)vendor; | |
332 | } | |
333 | ||
36b64976 AB |
334 | static const efi_char16_t apple[] = L"Apple"; |
335 | ||
a1b87d54 | 336 | static void setup_quirks(struct boot_params *boot_params) |
58c5475a | 337 | { |
50d7cdf7 AB |
338 | if (IS_ENABLED(CONFIG_APPLE_PROPERTIES) && |
339 | !memcmp(efistub_fw_vendor(), apple, sizeof(apple))) | |
340 | retrieve_apple_device_properties(boot_params); | |
58c5475a LW |
341 | } |
342 | ||
290084c2 AB |
343 | /* |
344 | * See if we have Universal Graphics Adapter (UGA) protocol | |
345 | */ | |
c116e8d6 | 346 | static efi_status_t |
290084c2 | 347 | setup_uga(struct screen_info *si, efi_guid_t *uga_proto, unsigned long size) |
c116e8d6 | 348 | { |
290084c2 AB |
349 | efi_status_t status; |
350 | u32 width, height; | |
351 | void **uga_handle = NULL; | |
0b767b16 | 352 | efi_uga_draw_protocol_t *uga = NULL, *first_uga; |
2732ea0d | 353 | efi_handle_t handle; |
c116e8d6 MF |
354 | int i; |
355 | ||
966291f6 AB |
356 | status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, size, |
357 | (void **)&uga_handle); | |
290084c2 AB |
358 | if (status != EFI_SUCCESS) |
359 | return status; | |
c116e8d6 | 360 | |
966291f6 AB |
361 | status = efi_bs_call(locate_handle, EFI_LOCATE_BY_PROTOCOL, |
362 | uga_proto, NULL, &size, uga_handle); | |
290084c2 AB |
363 | if (status != EFI_SUCCESS) |
364 | goto free_handle; | |
291f3632 | 365 | |
290084c2 AB |
366 | height = 0; |
367 | width = 0; | |
c116e8d6 MF |
368 | |
369 | first_uga = NULL; | |
2732ea0d | 370 | for_each_efi_handle(handle, uga_handle, size, i) { |
291f3632 | 371 | efi_guid_t pciio_proto = EFI_PCI_IO_PROTOCOL_GUID; |
291f3632 MF |
372 | u32 w, h, depth, refresh; |
373 | void *pciio; | |
374 | ||
966291f6 AB |
375 | status = efi_bs_call(handle_protocol, handle, uga_proto, |
376 | (void **)&uga); | |
291f3632 MF |
377 | if (status != EFI_SUCCESS) |
378 | continue; | |
379 | ||
093174f5 | 380 | pciio = NULL; |
966291f6 | 381 | efi_bs_call(handle_protocol, handle, &pciio_proto, &pciio); |
291f3632 | 382 | |
47c0fd39 | 383 | status = efi_call_proto(uga, get_mode, &w, &h, &depth, &refresh); |
291f3632 | 384 | if (status == EFI_SUCCESS && (!first_uga || pciio)) { |
290084c2 AB |
385 | width = w; |
386 | height = h; | |
291f3632 MF |
387 | |
388 | /* | |
389 | * Once we've found a UGA supporting PCIIO, | |
390 | * don't bother looking any further. | |
391 | */ | |
392 | if (pciio) | |
393 | break; | |
394 | ||
395 | first_uga = uga; | |
396 | } | |
397 | } | |
398 | ||
c116e8d6 | 399 | if (!width && !height) |
291f3632 MF |
400 | goto free_handle; |
401 | ||
402 | /* EFI framebuffer */ | |
90a2186b | 403 | si->orig_video_isVGA = VIDEO_TYPE_EFI; |
291f3632 | 404 | |
90a2186b IM |
405 | si->lfb_depth = 32; |
406 | si->lfb_width = width; | |
407 | si->lfb_height = height; | |
291f3632 | 408 | |
90a2186b IM |
409 | si->red_size = 8; |
410 | si->red_pos = 16; | |
411 | si->green_size = 8; | |
412 | si->green_pos = 8; | |
413 | si->blue_size = 8; | |
414 | si->blue_pos = 0; | |
415 | si->rsvd_size = 8; | |
416 | si->rsvd_pos = 24; | |
291f3632 | 417 | |
291f3632 | 418 | free_handle: |
966291f6 | 419 | efi_bs_call(free_pool, uga_handle); |
90a2186b | 420 | |
291f3632 MF |
421 | return status; |
422 | } | |
423 | ||
f32ea1cd | 424 | static void setup_graphics(struct boot_params *boot_params) |
291f3632 MF |
425 | { |
426 | efi_guid_t graphics_proto = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID; | |
427 | struct screen_info *si; | |
428 | efi_guid_t uga_proto = EFI_UGA_PROTOCOL_GUID; | |
429 | efi_status_t status; | |
430 | unsigned long size; | |
431 | void **gop_handle = NULL; | |
432 | void **uga_handle = NULL; | |
433 | ||
434 | si = &boot_params->screen_info; | |
435 | memset(si, 0, sizeof(*si)); | |
436 | ||
437 | size = 0; | |
966291f6 AB |
438 | status = efi_bs_call(locate_handle, EFI_LOCATE_BY_PROTOCOL, |
439 | &graphics_proto, NULL, &size, gop_handle); | |
291f3632 | 440 | if (status == EFI_BUFFER_TOO_SMALL) |
cd33a5c1 | 441 | status = efi_setup_gop(si, &graphics_proto, size); |
291f3632 MF |
442 | |
443 | if (status != EFI_SUCCESS) { | |
444 | size = 0; | |
966291f6 AB |
445 | status = efi_bs_call(locate_handle, EFI_LOCATE_BY_PROTOCOL, |
446 | &uga_proto, NULL, &size, uga_handle); | |
291f3632 MF |
447 | if (status == EFI_BUFFER_TOO_SMALL) |
448 | setup_uga(si, &uga_proto, size); | |
449 | } | |
450 | } | |
451 | ||
3b8f44fc AB |
452 | |
453 | static void __noreturn efi_exit(efi_handle_t handle, efi_status_t status) | |
454 | { | |
455 | efi_bs_call(exit, handle, status, 0, NULL); | |
f3fa0efc AB |
456 | for(;;) |
457 | asm("hlt"); | |
3b8f44fc AB |
458 | } |
459 | ||
c3710de5 AB |
460 | void __noreturn efi_stub_entry(efi_handle_t handle, |
461 | efi_system_table_t *sys_table_arg, | |
462 | struct boot_params *boot_params); | |
463 | ||
291f3632 MF |
464 | /* |
465 | * Because the x86 boot code expects to be passed a boot_params we | |
466 | * need to create one ourselves (usually the bootloader would create | |
467 | * one for us). | |
468 | */ | |
c3710de5 AB |
469 | efi_status_t __efiapi efi_pe_entry(efi_handle_t handle, |
470 | efi_system_table_t *sys_table_arg) | |
291f3632 | 471 | { |
7e502622 AB |
472 | static struct boot_params boot_params __page_aligned_bss; |
473 | struct setup_header *hdr = &boot_params.hdr; | |
9ca8f72a | 474 | efi_guid_t proto = LOADED_IMAGE_PROTOCOL_GUID; |
291f3632 MF |
475 | int options_size = 0; |
476 | efi_status_t status; | |
5fef3870 | 477 | char *cmdline_ptr; |
291f3632 | 478 | |
df7ecce8 AB |
479 | if (efi_is_native()) |
480 | memset(_bss, 0, _ebss - _bss); | |
b3810c5a | 481 | |
ccc27ae7 | 482 | efi_system_table = sys_table_arg; |
9ca8f72a MF |
483 | |
484 | /* Check if we were booted by the EFI firmware */ | |
ccc27ae7 | 485 | if (efi_system_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE) |
3b8f44fc | 486 | efi_exit(handle, EFI_INVALID_PARAMETER); |
54b52d87 | 487 | |
0347d8c2 | 488 | status = efi_bs_call(handle_protocol, handle, &proto, (void **)&image); |
9ca8f72a | 489 | if (status != EFI_SUCCESS) { |
36bdd0a7 | 490 | efi_err("Failed to get handle for LOADED_IMAGE_PROTOCOL\n"); |
3b8f44fc | 491 | efi_exit(handle, status); |
9ca8f72a MF |
492 | } |
493 | ||
7e502622 | 494 | /* Assign the setup_header fields that the kernel actually cares about */ |
90a2186b IM |
495 | hdr->root_flags = 1; |
496 | hdr->vid_mode = 0xffff; | |
9ca8f72a | 497 | |
291f3632 | 498 | hdr->type_of_loader = 0x21; |
decd347c | 499 | hdr->initrd_addr_max = INT_MAX; |
291f3632 MF |
500 | |
501 | /* Convert unicode cmdline to ascii */ | |
27cd5511 | 502 | cmdline_ptr = efi_convert_cmdline(image, &options_size); |
5fef3870 RF |
503 | if (!cmdline_ptr) |
504 | goto fail; | |
90a2186b | 505 | |
7e502622 AB |
506 | efi_set_u64_split((unsigned long)cmdline_ptr, &hdr->cmd_line_ptr, |
507 | &boot_params.ext_cmd_line_ptr); | |
291f3632 | 508 | |
7e502622 | 509 | efi_stub_entry(handle, sys_table_arg, &boot_params); |
c3710de5 | 510 | /* not reached */ |
90a2186b | 511 | |
9ca8f72a | 512 | fail: |
3b8f44fc | 513 | efi_exit(handle, status); |
9ca8f72a MF |
514 | } |
515 | ||
d2078d5a LC |
516 | static void add_e820ext(struct boot_params *params, |
517 | struct setup_data *e820ext, u32 nr_entries) | |
9ca8f72a | 518 | { |
d2078d5a | 519 | struct setup_data *data; |
291f3632 | 520 | |
d2078d5a | 521 | e820ext->type = SETUP_E820_EXT; |
90a2186b | 522 | e820ext->len = nr_entries * sizeof(struct boot_e820_entry); |
d2078d5a | 523 | e820ext->next = 0; |
291f3632 | 524 | |
d2078d5a | 525 | data = (struct setup_data *)(unsigned long)params->hdr.setup_data; |
291f3632 | 526 | |
d2078d5a LC |
527 | while (data && data->next) |
528 | data = (struct setup_data *)(unsigned long)data->next; | |
d3768d88 | 529 | |
d2078d5a LC |
530 | if (data) |
531 | data->next = (unsigned long)e820ext; | |
532 | else | |
533 | params->hdr.setup_data = (unsigned long)e820ext; | |
534 | } | |
291f3632 | 535 | |
90a2186b IM |
536 | static efi_status_t |
537 | setup_e820(struct boot_params *params, struct setup_data *e820ext, u32 e820ext_size) | |
d2078d5a | 538 | { |
7410aa1c | 539 | struct boot_e820_entry *entry = params->e820_table; |
d2078d5a | 540 | struct efi_info *efi = ¶ms->efi_info; |
7410aa1c | 541 | struct boot_e820_entry *prev = NULL; |
d2078d5a LC |
542 | u32 nr_entries; |
543 | u32 nr_desc; | |
544 | int i; | |
291f3632 | 545 | |
291f3632 | 546 | nr_entries = 0; |
d2078d5a LC |
547 | nr_desc = efi->efi_memmap_size / efi->efi_memdesc_size; |
548 | ||
549 | for (i = 0; i < nr_desc; i++) { | |
291f3632 MF |
550 | efi_memory_desc_t *d; |
551 | unsigned int e820_type = 0; | |
d2078d5a | 552 | unsigned long m = efi->efi_memmap; |
291f3632 | 553 | |
7cc03e48 DS |
554 | #ifdef CONFIG_X86_64 |
555 | m |= (u64)efi->efi_memmap_hi << 32; | |
556 | #endif | |
557 | ||
02e43c2d | 558 | d = efi_early_memdesc_ptr(m, efi->efi_memdesc_size, i); |
291f3632 MF |
559 | switch (d->type) { |
560 | case EFI_RESERVED_TYPE: | |
561 | case EFI_RUNTIME_SERVICES_CODE: | |
562 | case EFI_RUNTIME_SERVICES_DATA: | |
563 | case EFI_MEMORY_MAPPED_IO: | |
564 | case EFI_MEMORY_MAPPED_IO_PORT_SPACE: | |
565 | case EFI_PAL_CODE: | |
09821ff1 | 566 | e820_type = E820_TYPE_RESERVED; |
291f3632 MF |
567 | break; |
568 | ||
569 | case EFI_UNUSABLE_MEMORY: | |
09821ff1 | 570 | e820_type = E820_TYPE_UNUSABLE; |
291f3632 MF |
571 | break; |
572 | ||
573 | case EFI_ACPI_RECLAIM_MEMORY: | |
09821ff1 | 574 | e820_type = E820_TYPE_ACPI; |
291f3632 MF |
575 | break; |
576 | ||
577 | case EFI_LOADER_CODE: | |
578 | case EFI_LOADER_DATA: | |
579 | case EFI_BOOT_SERVICES_CODE: | |
580 | case EFI_BOOT_SERVICES_DATA: | |
581 | case EFI_CONVENTIONAL_MEMORY: | |
262b45ae DW |
582 | if (efi_soft_reserve_enabled() && |
583 | (d->attribute & EFI_MEMORY_SP)) | |
584 | e820_type = E820_TYPE_SOFT_RESERVED; | |
585 | else | |
586 | e820_type = E820_TYPE_RAM; | |
291f3632 MF |
587 | break; |
588 | ||
589 | case EFI_ACPI_MEMORY_NVS: | |
09821ff1 | 590 | e820_type = E820_TYPE_NVS; |
291f3632 MF |
591 | break; |
592 | ||
ad5fb870 | 593 | case EFI_PERSISTENT_MEMORY: |
09821ff1 | 594 | e820_type = E820_TYPE_PMEM; |
ad5fb870 DW |
595 | break; |
596 | ||
745e3ed8 | 597 | case EFI_UNACCEPTED_MEMORY: |
ff07186b | 598 | if (!IS_ENABLED(CONFIG_UNACCEPTED_MEMORY)) |
745e3ed8 | 599 | continue; |
745e3ed8 KS |
600 | e820_type = E820_TYPE_RAM; |
601 | process_unaccepted_memory(d->phys_addr, | |
602 | d->phys_addr + PAGE_SIZE * d->num_pages); | |
603 | break; | |
291f3632 MF |
604 | default: |
605 | continue; | |
606 | } | |
607 | ||
608 | /* Merge adjacent mappings */ | |
609 | if (prev && prev->type == e820_type && | |
d2078d5a | 610 | (prev->addr + prev->size) == d->phys_addr) { |
291f3632 | 611 | prev->size += d->num_pages << 12; |
d2078d5a | 612 | continue; |
291f3632 | 613 | } |
d2078d5a | 614 | |
61a50101 | 615 | if (nr_entries == ARRAY_SIZE(params->e820_table)) { |
8ec67d97 | 616 | u32 need = (nr_desc - i) * sizeof(struct e820_entry) + |
d2078d5a LC |
617 | sizeof(struct setup_data); |
618 | ||
619 | if (!e820ext || e820ext_size < need) | |
620 | return EFI_BUFFER_TOO_SMALL; | |
621 | ||
622 | /* boot_params map full, switch to e820 extended */ | |
7410aa1c | 623 | entry = (struct boot_e820_entry *)e820ext->data; |
d2078d5a LC |
624 | } |
625 | ||
7410aa1c IM |
626 | entry->addr = d->phys_addr; |
627 | entry->size = d->num_pages << PAGE_SHIFT; | |
628 | entry->type = e820_type; | |
629 | prev = entry++; | |
d2078d5a | 630 | nr_entries++; |
291f3632 MF |
631 | } |
632 | ||
61a50101 IM |
633 | if (nr_entries > ARRAY_SIZE(params->e820_table)) { |
634 | u32 nr_e820ext = nr_entries - ARRAY_SIZE(params->e820_table); | |
d2078d5a LC |
635 | |
636 | add_e820ext(params, e820ext, nr_e820ext); | |
637 | nr_entries -= nr_e820ext; | |
638 | } | |
639 | ||
640 | params->e820_entries = (u8)nr_entries; | |
641 | ||
642 | return EFI_SUCCESS; | |
643 | } | |
644 | ||
645 | static efi_status_t alloc_e820ext(u32 nr_desc, struct setup_data **e820ext, | |
646 | u32 *e820ext_size) | |
647 | { | |
648 | efi_status_t status; | |
649 | unsigned long size; | |
650 | ||
651 | size = sizeof(struct setup_data) + | |
8ec67d97 | 652 | sizeof(struct e820_entry) * nr_desc; |
d2078d5a LC |
653 | |
654 | if (*e820ext) { | |
966291f6 | 655 | efi_bs_call(free_pool, *e820ext); |
d2078d5a LC |
656 | *e820ext = NULL; |
657 | *e820ext_size = 0; | |
658 | } | |
659 | ||
966291f6 AB |
660 | status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, size, |
661 | (void **)e820ext); | |
d2078d5a LC |
662 | if (status == EFI_SUCCESS) |
663 | *e820ext_size = size; | |
664 | ||
665 | return status; | |
666 | } | |
667 | ||
b84a64fa ES |
668 | static efi_status_t allocate_e820(struct boot_params *params, |
669 | struct setup_data **e820ext, | |
670 | u32 *e820ext_size) | |
671 | { | |
2e9f46ee | 672 | struct efi_boot_memmap *map; |
b84a64fa | 673 | efi_status_t status; |
2e9f46ee | 674 | __u32 nr_desc; |
b84a64fa | 675 | |
2e9f46ee KS |
676 | status = efi_get_memory_map(&map, false); |
677 | if (status != EFI_SUCCESS) | |
678 | return status; | |
b84a64fa | 679 | |
2e9f46ee KS |
680 | nr_desc = map->map_size / map->desc_size; |
681 | if (nr_desc > ARRAY_SIZE(params->e820_table) - EFI_MMAP_NR_SLACK_SLOTS) { | |
682 | u32 nr_e820ext = nr_desc - ARRAY_SIZE(params->e820_table) + | |
683 | EFI_MMAP_NR_SLACK_SLOTS; | |
b84a64fa ES |
684 | |
685 | status = alloc_e820ext(nr_e820ext, e820ext, e820ext_size); | |
b84a64fa ES |
686 | } |
687 | ||
745e3ed8 KS |
688 | if (IS_ENABLED(CONFIG_UNACCEPTED_MEMORY) && status == EFI_SUCCESS) |
689 | status = allocate_unaccepted_bitmap(nr_desc, map); | |
690 | ||
2e9f46ee KS |
691 | efi_bs_call(free_pool, map); |
692 | return status; | |
b84a64fa ES |
693 | } |
694 | ||
d6493401 | 695 | struct exit_boot_struct { |
90a2186b IM |
696 | struct boot_params *boot_params; |
697 | struct efi_info *efi; | |
d6493401 JH |
698 | }; |
699 | ||
cd33a5c1 | 700 | static efi_status_t exit_boot_func(struct efi_boot_memmap *map, |
d6493401 JH |
701 | void *priv) |
702 | { | |
d6493401 | 703 | const char *signature; |
d6493401 JH |
704 | struct exit_boot_struct *p = priv; |
705 | ||
aab9593c AB |
706 | signature = efi_is_64bit() ? EFI64_LOADER_SIGNATURE |
707 | : EFI32_LOADER_SIGNATURE; | |
d6493401 JH |
708 | memcpy(&p->efi->efi_loader_signature, signature, sizeof(__u32)); |
709 | ||
eed4e019 AS |
710 | efi_set_u64_split((unsigned long)efi_system_table, |
711 | &p->efi->efi_systab, &p->efi->efi_systab_hi); | |
eab31265 AB |
712 | p->efi->efi_memdesc_size = map->desc_size; |
713 | p->efi->efi_memdesc_version = map->desc_ver; | |
714 | efi_set_u64_split((unsigned long)map->map, | |
eed4e019 | 715 | &p->efi->efi_memmap, &p->efi->efi_memmap_hi); |
eab31265 | 716 | p->efi->efi_memmap_size = map->map_size; |
d6493401 | 717 | |
d6493401 JH |
718 | return EFI_SUCCESS; |
719 | } | |
720 | ||
aab9593c | 721 | static efi_status_t exit_boot(struct boot_params *boot_params, void *handle) |
d2078d5a | 722 | { |
b84a64fa ES |
723 | struct setup_data *e820ext = NULL; |
724 | __u32 e820ext_size = 0; | |
d2078d5a | 725 | efi_status_t status; |
d6493401 JH |
726 | struct exit_boot_struct priv; |
727 | ||
90a2186b IM |
728 | priv.boot_params = boot_params; |
729 | priv.efi = &boot_params->efi_info; | |
b84a64fa ES |
730 | |
731 | status = allocate_e820(boot_params, &e820ext, &e820ext_size); | |
732 | if (status != EFI_SUCCESS) | |
733 | return status; | |
dadb57ab | 734 | |
d6493401 | 735 | /* Might as well exit boot services now */ |
eab31265 | 736 | status = efi_exit_boot_services(handle, &priv, exit_boot_func); |
d2078d5a LC |
737 | if (status != EFI_SUCCESS) |
738 | return status; | |
739 | ||
d2078d5a | 740 | /* Historic? */ |
90a2186b | 741 | boot_params->alt_mem_k = 32 * 1024; |
d2078d5a LC |
742 | |
743 | status = setup_e820(boot_params, e820ext, e820ext_size); | |
744 | if (status != EFI_SUCCESS) | |
745 | return status; | |
291f3632 MF |
746 | |
747 | return EFI_SUCCESS; | |
291f3632 MF |
748 | } |
749 | ||
31c77a50 AB |
750 | static bool have_unsupported_snp_features(void) |
751 | { | |
752 | u64 unsupported; | |
753 | ||
754 | unsupported = snp_get_unsupported_features(sev_get_status()); | |
755 | if (unsupported) { | |
756 | efi_err("Unsupported SEV-SNP features detected: 0x%llx\n", | |
757 | unsupported); | |
758 | return true; | |
759 | } | |
760 | return false; | |
761 | } | |
762 | ||
a1b87d54 AB |
763 | static void efi_get_seed(void *seed, int size) |
764 | { | |
765 | efi_get_random_bytes(size, seed); | |
766 | ||
767 | /* | |
768 | * This only updates seed[0] when running on 32-bit, but in that case, | |
769 | * seed[1] is not used anyway, as there is no virtual KASLR on 32-bit. | |
770 | */ | |
771 | *(unsigned long *)seed ^= kaslr_get_random_long("EFI"); | |
772 | } | |
773 | ||
774 | static void error(char *str) | |
775 | { | |
776 | efi_warn("Decompression failed: %s\n", str); | |
777 | } | |
778 | ||
15aa8fb8 AB |
779 | static const char *cmdline_memmap_override; |
780 | ||
781 | static efi_status_t parse_options(const char *cmdline) | |
782 | { | |
783 | static const char opts[][14] = { | |
784 | "mem=", "memmap=", "efi_fake_mem=", "hugepages=" | |
785 | }; | |
786 | ||
787 | for (int i = 0; i < ARRAY_SIZE(opts); i++) { | |
788 | const char *p = strstr(cmdline, opts[i]); | |
789 | ||
790 | if (p == cmdline || (p > cmdline && isspace(p[-1]))) { | |
791 | cmdline_memmap_override = opts[i]; | |
792 | break; | |
793 | } | |
794 | } | |
795 | ||
796 | return efi_parse_options(cmdline); | |
797 | } | |
798 | ||
a1b87d54 AB |
799 | static efi_status_t efi_decompress_kernel(unsigned long *kernel_entry) |
800 | { | |
801 | unsigned long virt_addr = LOAD_PHYSICAL_ADDR; | |
802 | unsigned long addr, alloc_size, entry; | |
803 | efi_status_t status; | |
804 | u32 seed[2] = {}; | |
805 | ||
806 | /* determine the required size of the allocation */ | |
807 | alloc_size = ALIGN(max_t(unsigned long, output_len, kernel_total_size), | |
808 | MIN_KERNEL_ALIGN); | |
809 | ||
810 | if (IS_ENABLED(CONFIG_RANDOMIZE_BASE) && !efi_nokaslr) { | |
811 | u64 range = KERNEL_IMAGE_SIZE - LOAD_PHYSICAL_ADDR - kernel_total_size; | |
50d7cdf7 | 812 | static const efi_char16_t ami[] = L"American Megatrends"; |
a1b87d54 AB |
813 | |
814 | efi_get_seed(seed, sizeof(seed)); | |
815 | ||
816 | virt_addr += (range * seed[1]) >> 32; | |
817 | virt_addr &= ~(CONFIG_PHYSICAL_ALIGN - 1); | |
50d7cdf7 AB |
818 | |
819 | /* | |
820 | * Older Dell systems with AMI UEFI firmware v2.0 may hang | |
821 | * while decompressing the kernel if physical address | |
822 | * randomization is enabled. | |
823 | * | |
824 | * https://bugzilla.kernel.org/show_bug.cgi?id=218173 | |
825 | */ | |
826 | if (efi_system_table->hdr.revision <= EFI_2_00_SYSTEM_TABLE_REVISION && | |
827 | !memcmp(efistub_fw_vendor(), ami, sizeof(ami))) { | |
828 | efi_debug("AMI firmware v2.0 or older detected - disabling physical KASLR\n"); | |
829 | seed[0] = 0; | |
15aa8fb8 AB |
830 | } else if (cmdline_memmap_override) { |
831 | efi_info("%s detected on the kernel command line - disabling physical KASLR\n", | |
832 | cmdline_memmap_override); | |
833 | seed[0] = 0; | |
50d7cdf7 | 834 | } |
01638431 YW |
835 | |
836 | boot_params_ptr->hdr.loadflags |= KASLR_FLAG; | |
a1b87d54 AB |
837 | } |
838 | ||
839 | status = efi_random_alloc(alloc_size, CONFIG_PHYSICAL_ALIGN, &addr, | |
840 | seed[0], EFI_LOADER_CODE, | |
2f77465b | 841 | LOAD_PHYSICAL_ADDR, |
a1b87d54 AB |
842 | EFI_X86_KERNEL_ALLOC_LIMIT); |
843 | if (status != EFI_SUCCESS) | |
844 | return status; | |
845 | ||
846 | entry = decompress_kernel((void *)addr, virt_addr, error); | |
847 | if (entry == ULONG_MAX) { | |
848 | efi_free(alloc_size, addr); | |
849 | return EFI_LOAD_ERROR; | |
850 | } | |
851 | ||
852 | *kernel_entry = addr + entry; | |
853 | ||
9c554610 | 854 | return efi_adjust_memory_range_protection(addr, kernel_text_size); |
a1b87d54 AB |
855 | } |
856 | ||
d2d7a54f AB |
857 | static void __noreturn enter_kernel(unsigned long kernel_addr, |
858 | struct boot_params *boot_params) | |
859 | { | |
860 | /* enter decompressed kernel with boot_params pointer in RSI/ESI */ | |
861 | asm("jmp *%0"::"r"(kernel_addr), "S"(boot_params)); | |
862 | ||
863 | unreachable(); | |
864 | } | |
865 | ||
9ca8f72a | 866 | /* |
d2d7a54f AB |
867 | * On success, this routine will jump to the relocated image directly and never |
868 | * return. On failure, it will exit to the firmware via efi_exit() instead of | |
869 | * returning. | |
9ca8f72a | 870 | */ |
df9215f1 AB |
871 | void __noreturn efi_stub_entry(efi_handle_t handle, |
872 | efi_system_table_t *sys_table_arg, | |
873 | struct boot_params *boot_params) | |
9ca8f72a | 874 | { |
11078876 | 875 | efi_guid_t guid = EFI_MEMORY_ATTRIBUTE_PROTOCOL_GUID; |
9ca8f72a | 876 | struct setup_header *hdr = &boot_params->hdr; |
f4dc7fff | 877 | const struct linux_efi_initrd *initrd = NULL; |
a1b87d54 | 878 | unsigned long kernel_entry; |
9ca8f72a | 879 | efi_status_t status; |
54b52d87 | 880 | |
50dcc2e0 | 881 | boot_params_ptr = boot_params; |
db772413 | 882 | |
ccc27ae7 | 883 | efi_system_table = sys_table_arg; |
9ca8f72a | 884 | /* Check if we were booted by the EFI firmware */ |
ccc27ae7 | 885 | if (efi_system_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE) |
3b8f44fc | 886 | efi_exit(handle, EFI_INVALID_PARAMETER); |
9ca8f72a | 887 | |
31c77a50 AB |
888 | if (have_unsupported_snp_features()) |
889 | efi_exit(handle, EFI_UNSUPPORTED); | |
890 | ||
11078876 AB |
891 | if (IS_ENABLED(CONFIG_EFI_DXE_MEM_ATTRIBUTES)) { |
892 | efi_dxe_table = get_efi_config_table(EFI_DXE_SERVICES_TABLE_GUID); | |
893 | if (efi_dxe_table && | |
894 | efi_dxe_table->hdr.signature != EFI_DXE_SERVICES_TABLE_SIGNATURE) { | |
895 | efi_warn("Ignoring DXE services table: invalid signature\n"); | |
896 | efi_dxe_table = NULL; | |
897 | } | |
3ba75c13 BE |
898 | } |
899 | ||
11078876 AB |
900 | /* grab the memory attributes protocol if it exists */ |
901 | efi_bs_call(locate_protocol, &guid, NULL, (void **)&memattr); | |
902 | ||
cb1c9e02 AB |
903 | status = efi_setup_5level_paging(); |
904 | if (status != EFI_SUCCESS) { | |
905 | efi_err("efi_setup_5level_paging() failed!\n"); | |
906 | goto fail; | |
907 | } | |
908 | ||
7dde67f2 | 909 | #ifdef CONFIG_CMDLINE_BOOL |
15aa8fb8 | 910 | status = parse_options(CONFIG_CMDLINE); |
055042be AS |
911 | if (status != EFI_SUCCESS) { |
912 | efi_err("Failed to parse options\n"); | |
913 | goto fail; | |
914 | } | |
7dde67f2 AS |
915 | #endif |
916 | if (!IS_ENABLED(CONFIG_CMDLINE_OVERRIDE)) { | |
917 | unsigned long cmdline_paddr = ((u64)hdr->cmd_line_ptr | | |
918 | ((u64)boot_params->ext_cmd_line_ptr << 32)); | |
15aa8fb8 | 919 | status = parse_options((char *)cmdline_paddr); |
055042be AS |
920 | if (status != EFI_SUCCESS) { |
921 | efi_err("Failed to parse options\n"); | |
922 | goto fail; | |
923 | } | |
7dde67f2 | 924 | } |
c33ce984 | 925 | |
cd0d9d92 AB |
926 | if (efi_mem_encrypt > 0) |
927 | hdr->xloadflags |= XLF_MEM_ENCRYPTION; | |
928 | ||
a1b87d54 AB |
929 | status = efi_decompress_kernel(&kernel_entry); |
930 | if (status != EFI_SUCCESS) { | |
931 | efi_err("Failed to decompress kernel\n"); | |
932 | goto fail; | |
933 | } | |
934 | ||
ec93fc37 | 935 | /* |
987053a3 AS |
936 | * At this point, an initrd may already have been loaded by the |
937 | * bootloader and passed via bootparams. We permit an initrd loaded | |
938 | * from the LINUX_EFI_INITRD_MEDIA_GUID device path to supersede it. | |
939 | * | |
940 | * If the device path is not present, any command-line initrd= | |
941 | * arguments will be processed only if image is not NULL, which will be | |
942 | * the case only if we were loaded via the PE entry point. | |
ec93fc37 | 943 | */ |
f4dc7fff AB |
944 | status = efi_load_initrd(image, hdr->initrd_addr_max, ULONG_MAX, |
945 | &initrd); | |
20287d56 AB |
946 | if (status != EFI_SUCCESS) |
947 | goto fail; | |
f4dc7fff AB |
948 | if (initrd && initrd->size > 0) { |
949 | efi_set_u64_split(initrd->base, &hdr->ramdisk_image, | |
20287d56 | 950 | &boot_params->ext_ramdisk_image); |
f4dc7fff | 951 | efi_set_u64_split(initrd->size, &hdr->ramdisk_size, |
20287d56 | 952 | &boot_params->ext_ramdisk_size); |
ec93fc37 AB |
953 | } |
954 | ||
f4dc7fff | 955 | |
de8cb458 DH |
956 | /* |
957 | * If the boot loader gave us a value for secure_boot then we use that, | |
958 | * otherwise we ask the BIOS. | |
959 | */ | |
960 | if (boot_params->secure_boot == efi_secureboot_mode_unset) | |
cd33a5c1 | 961 | boot_params->secure_boot = efi_get_secureboot(); |
ccc829ba MG |
962 | |
963 | /* Ask the firmware to clear memory on unclean shutdown */ | |
cd33a5c1 | 964 | efi_enable_reset_attack_mitigation(); |
0d959814 | 965 | |
cd33a5c1 | 966 | efi_random_get_seed(); |
0d959814 | 967 | |
d228814b | 968 | efi_retrieve_eventlog(); |
de8cb458 | 969 | |
9ca8f72a | 970 | setup_graphics(boot_params); |
291f3632 | 971 | |
56394ab8 | 972 | setup_efi_pci(boot_params); |
dd5fc854 | 973 | |
a1b87d54 | 974 | setup_quirks(boot_params); |
58c5475a | 975 | |
c0461bd1 DG |
976 | setup_unaccepted_memory(); |
977 | ||
aab9593c | 978 | status = exit_boot(boot_params, handle); |
fb86b244 | 979 | if (status != EFI_SUCCESS) { |
36bdd0a7 | 980 | efi_err("exit_boot() failed!\n"); |
291f3632 | 981 | goto fail; |
fb86b244 | 982 | } |
291f3632 | 983 | |
a1b87d54 AB |
984 | /* |
985 | * Call the SEV init code while still running with the firmware's | |
986 | * GDT/IDT, so #VC exceptions will be handled by EFI. | |
987 | */ | |
988 | sev_enable(boot_params); | |
cb1c9e02 | 989 | |
a1b87d54 | 990 | efi_5level_switch(); |
d2d7a54f | 991 | |
a1b87d54 | 992 | enter_kernel(kernel_entry, boot_params); |
291f3632 | 993 | fail: |
df9215f1 | 994 | efi_err("efi_stub_entry() failed!\n"); |
90a2186b | 995 | |
3b8f44fc | 996 | efi_exit(handle, status); |
291f3632 | 997 | } |
df9215f1 AB |
998 | |
999 | #ifdef CONFIG_EFI_HANDOVER_PROTOCOL | |
d7156b98 AB |
1000 | void efi_handover_entry(efi_handle_t handle, efi_system_table_t *sys_table_arg, |
1001 | struct boot_params *boot_params) | |
1002 | { | |
d7156b98 AB |
1003 | memset(_bss, 0, _ebss - _bss); |
1004 | efi_stub_entry(handle, sys_table_arg, boot_params); | |
1005 | } | |
1006 | ||
df9215f1 | 1007 | #ifndef CONFIG_EFI_MIXED |
d7156b98 | 1008 | extern __alias(efi_handover_entry) |
df9215f1 AB |
1009 | void efi32_stub_entry(efi_handle_t handle, efi_system_table_t *sys_table_arg, |
1010 | struct boot_params *boot_params); | |
1011 | ||
d7156b98 | 1012 | extern __alias(efi_handover_entry) |
df9215f1 AB |
1013 | void efi64_stub_entry(efi_handle_t handle, efi_system_table_t *sys_table_arg, |
1014 | struct boot_params *boot_params); | |
1015 | #endif | |
1016 | #endif |