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Commit | Line | Data |
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27f48d3e VG |
1 | /* |
2 | * Kexec bzImage loader | |
3 | * | |
4 | * Copyright (C) 2014 Red Hat Inc. | |
5 | * Authors: | |
6 | * Vivek Goyal <vgoyal@redhat.com> | |
7 | * | |
8 | * This source code is licensed under the GNU General Public License, | |
9 | * Version 2. See the file COPYING for more details. | |
10 | */ | |
11 | ||
12 | #define pr_fmt(fmt) "kexec-bzImage64: " fmt | |
13 | ||
14 | #include <linux/string.h> | |
15 | #include <linux/printk.h> | |
16 | #include <linux/errno.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/kexec.h> | |
19 | #include <linux/kernel.h> | |
20 | #include <linux/mm.h> | |
6a2c20e7 | 21 | #include <linux/efi.h> |
8e7d8381 VG |
22 | #include <linux/verify_pefile.h> |
23 | #include <keys/system_keyring.h> | |
27f48d3e VG |
24 | |
25 | #include <asm/bootparam.h> | |
26 | #include <asm/setup.h> | |
dd5f7260 | 27 | #include <asm/crash.h> |
6a2c20e7 | 28 | #include <asm/efi.h> |
f8da964d | 29 | #include <asm/kexec-bzimage64.h> |
dd5f7260 VG |
30 | |
31 | #define MAX_ELFCOREHDR_STR_LEN 30 /* elfcorehdr=0x<64bit-value> */ | |
27f48d3e VG |
32 | |
33 | /* | |
34 | * Defines lowest physical address for various segments. Not sure where | |
35 | * exactly these limits came from. Current bzimage64 loader in kexec-tools | |
36 | * uses these so I am retaining it. It can be changed over time as we gain | |
37 | * more insight. | |
38 | */ | |
39 | #define MIN_PURGATORY_ADDR 0x3000 | |
40 | #define MIN_BOOTPARAM_ADDR 0x3000 | |
41 | #define MIN_KERNEL_LOAD_ADDR 0x100000 | |
42 | #define MIN_INITRD_LOAD_ADDR 0x1000000 | |
43 | ||
44 | /* | |
45 | * This is a place holder for all boot loader specific data structure which | |
46 | * gets allocated in one call but gets freed much later during cleanup | |
47 | * time. Right now there is only one field but it can grow as need be. | |
48 | */ | |
49 | struct bzimage64_data { | |
50 | /* | |
51 | * Temporary buffer to hold bootparams buffer. This should be | |
52 | * freed once the bootparam segment has been loaded. | |
53 | */ | |
54 | void *bootparams_buf; | |
55 | }; | |
56 | ||
57 | static int setup_initrd(struct boot_params *params, | |
58 | unsigned long initrd_load_addr, unsigned long initrd_len) | |
59 | { | |
60 | params->hdr.ramdisk_image = initrd_load_addr & 0xffffffffUL; | |
61 | params->hdr.ramdisk_size = initrd_len & 0xffffffffUL; | |
62 | ||
63 | params->ext_ramdisk_image = initrd_load_addr >> 32; | |
64 | params->ext_ramdisk_size = initrd_len >> 32; | |
65 | ||
66 | return 0; | |
67 | } | |
68 | ||
dd5f7260 | 69 | static int setup_cmdline(struct kimage *image, struct boot_params *params, |
27f48d3e VG |
70 | unsigned long bootparams_load_addr, |
71 | unsigned long cmdline_offset, char *cmdline, | |
72 | unsigned long cmdline_len) | |
73 | { | |
74 | char *cmdline_ptr = ((char *)params) + cmdline_offset; | |
a846f479 | 75 | unsigned long cmdline_ptr_phys, len = 0; |
27f48d3e VG |
76 | uint32_t cmdline_low_32, cmdline_ext_32; |
77 | ||
dd5f7260 | 78 | if (image->type == KEXEC_TYPE_CRASH) { |
a846f479 KA |
79 | len = sprintf(cmdline_ptr, |
80 | "elfcorehdr=0x%lx ", image->arch.elf_load_addr); | |
dd5f7260 | 81 | } |
a846f479 KA |
82 | memcpy(cmdline_ptr + len, cmdline, cmdline_len); |
83 | cmdline_len += len; | |
84 | ||
27f48d3e VG |
85 | cmdline_ptr[cmdline_len - 1] = '\0'; |
86 | ||
dd5f7260 | 87 | pr_debug("Final command line is: %s\n", cmdline_ptr); |
27f48d3e VG |
88 | cmdline_ptr_phys = bootparams_load_addr + cmdline_offset; |
89 | cmdline_low_32 = cmdline_ptr_phys & 0xffffffffUL; | |
90 | cmdline_ext_32 = cmdline_ptr_phys >> 32; | |
91 | ||
92 | params->hdr.cmd_line_ptr = cmdline_low_32; | |
93 | if (cmdline_ext_32) | |
94 | params->ext_cmd_line_ptr = cmdline_ext_32; | |
95 | ||
96 | return 0; | |
97 | } | |
98 | ||
6a2c20e7 | 99 | static int setup_e820_entries(struct boot_params *params) |
27f48d3e VG |
100 | { |
101 | unsigned int nr_e820_entries; | |
102 | ||
103 | nr_e820_entries = e820_saved.nr_map; | |
104 | ||
105 | /* TODO: Pass entries more than E820MAX in bootparams setup data */ | |
106 | if (nr_e820_entries > E820MAX) | |
107 | nr_e820_entries = E820MAX; | |
108 | ||
109 | params->e820_entries = nr_e820_entries; | |
110 | memcpy(¶ms->e820_map, &e820_saved.map, | |
111 | nr_e820_entries * sizeof(struct e820entry)); | |
112 | ||
113 | return 0; | |
114 | } | |
115 | ||
6a2c20e7 VG |
116 | #ifdef CONFIG_EFI |
117 | static int setup_efi_info_memmap(struct boot_params *params, | |
118 | unsigned long params_load_addr, | |
119 | unsigned int efi_map_offset, | |
120 | unsigned int efi_map_sz) | |
121 | { | |
122 | void *efi_map = (void *)params + efi_map_offset; | |
123 | unsigned long efi_map_phys_addr = params_load_addr + efi_map_offset; | |
124 | struct efi_info *ei = ¶ms->efi_info; | |
125 | ||
126 | if (!efi_map_sz) | |
127 | return 0; | |
128 | ||
129 | efi_runtime_map_copy(efi_map, efi_map_sz); | |
130 | ||
131 | ei->efi_memmap = efi_map_phys_addr & 0xffffffff; | |
132 | ei->efi_memmap_hi = efi_map_phys_addr >> 32; | |
133 | ei->efi_memmap_size = efi_map_sz; | |
134 | ||
135 | return 0; | |
136 | } | |
137 | ||
138 | static int | |
139 | prepare_add_efi_setup_data(struct boot_params *params, | |
140 | unsigned long params_load_addr, | |
141 | unsigned int efi_setup_data_offset) | |
142 | { | |
143 | unsigned long setup_data_phys; | |
144 | struct setup_data *sd = (void *)params + efi_setup_data_offset; | |
145 | struct efi_setup_data *esd = (void *)sd + sizeof(struct setup_data); | |
146 | ||
147 | esd->fw_vendor = efi.fw_vendor; | |
148 | esd->runtime = efi.runtime; | |
149 | esd->tables = efi.config_table; | |
150 | esd->smbios = efi.smbios; | |
151 | ||
152 | sd->type = SETUP_EFI; | |
153 | sd->len = sizeof(struct efi_setup_data); | |
154 | ||
155 | /* Add setup data */ | |
156 | setup_data_phys = params_load_addr + efi_setup_data_offset; | |
157 | sd->next = params->hdr.setup_data; | |
158 | params->hdr.setup_data = setup_data_phys; | |
159 | ||
160 | return 0; | |
161 | } | |
162 | ||
163 | static int | |
164 | setup_efi_state(struct boot_params *params, unsigned long params_load_addr, | |
165 | unsigned int efi_map_offset, unsigned int efi_map_sz, | |
166 | unsigned int efi_setup_data_offset) | |
167 | { | |
168 | struct efi_info *current_ei = &boot_params.efi_info; | |
169 | struct efi_info *ei = ¶ms->efi_info; | |
170 | ||
171 | if (!current_ei->efi_memmap_size) | |
172 | return 0; | |
173 | ||
174 | /* | |
175 | * If 1:1 mapping is not enabled, second kernel can not setup EFI | |
176 | * and use EFI run time services. User space will have to pass | |
177 | * acpi_rsdp=<addr> on kernel command line to make second kernel boot | |
178 | * without efi. | |
179 | */ | |
180 | if (efi_enabled(EFI_OLD_MEMMAP)) | |
181 | return 0; | |
182 | ||
183 | ei->efi_loader_signature = current_ei->efi_loader_signature; | |
184 | ei->efi_systab = current_ei->efi_systab; | |
185 | ei->efi_systab_hi = current_ei->efi_systab_hi; | |
186 | ||
187 | ei->efi_memdesc_version = current_ei->efi_memdesc_version; | |
188 | ei->efi_memdesc_size = efi_get_runtime_map_desc_size(); | |
189 | ||
190 | setup_efi_info_memmap(params, params_load_addr, efi_map_offset, | |
191 | efi_map_sz); | |
192 | prepare_add_efi_setup_data(params, params_load_addr, | |
193 | efi_setup_data_offset); | |
194 | return 0; | |
195 | } | |
196 | #endif /* CONFIG_EFI */ | |
197 | ||
198 | static int | |
199 | setup_boot_parameters(struct kimage *image, struct boot_params *params, | |
200 | unsigned long params_load_addr, | |
201 | unsigned int efi_map_offset, unsigned int efi_map_sz, | |
202 | unsigned int efi_setup_data_offset) | |
27f48d3e VG |
203 | { |
204 | unsigned int nr_e820_entries; | |
205 | unsigned long long mem_k, start, end; | |
dd5f7260 | 206 | int i, ret = 0; |
27f48d3e VG |
207 | |
208 | /* Get subarch from existing bootparams */ | |
209 | params->hdr.hardware_subarch = boot_params.hdr.hardware_subarch; | |
210 | ||
211 | /* Copying screen_info will do? */ | |
212 | memcpy(¶ms->screen_info, &boot_params.screen_info, | |
213 | sizeof(struct screen_info)); | |
214 | ||
215 | /* Fill in memsize later */ | |
216 | params->screen_info.ext_mem_k = 0; | |
217 | params->alt_mem_k = 0; | |
218 | ||
219 | /* Default APM info */ | |
220 | memset(¶ms->apm_bios_info, 0, sizeof(params->apm_bios_info)); | |
221 | ||
222 | /* Default drive info */ | |
223 | memset(¶ms->hd0_info, 0, sizeof(params->hd0_info)); | |
224 | memset(¶ms->hd1_info, 0, sizeof(params->hd1_info)); | |
225 | ||
dd5f7260 VG |
226 | if (image->type == KEXEC_TYPE_CRASH) { |
227 | ret = crash_setup_memmap_entries(image, params); | |
228 | if (ret) | |
229 | return ret; | |
230 | } else | |
6a2c20e7 | 231 | setup_e820_entries(params); |
dd5f7260 | 232 | |
27f48d3e VG |
233 | nr_e820_entries = params->e820_entries; |
234 | ||
235 | for (i = 0; i < nr_e820_entries; i++) { | |
236 | if (params->e820_map[i].type != E820_RAM) | |
237 | continue; | |
238 | start = params->e820_map[i].addr; | |
239 | end = params->e820_map[i].addr + params->e820_map[i].size - 1; | |
240 | ||
241 | if ((start <= 0x100000) && end > 0x100000) { | |
242 | mem_k = (end >> 10) - (0x100000 >> 10); | |
243 | params->screen_info.ext_mem_k = mem_k; | |
244 | params->alt_mem_k = mem_k; | |
245 | if (mem_k > 0xfc00) | |
246 | params->screen_info.ext_mem_k = 0xfc00; /* 64M*/ | |
247 | if (mem_k > 0xffffffff) | |
248 | params->alt_mem_k = 0xffffffff; | |
249 | } | |
250 | } | |
251 | ||
6a2c20e7 VG |
252 | #ifdef CONFIG_EFI |
253 | /* Setup EFI state */ | |
254 | setup_efi_state(params, params_load_addr, efi_map_offset, efi_map_sz, | |
255 | efi_setup_data_offset); | |
256 | #endif | |
257 | ||
27f48d3e VG |
258 | /* Setup EDD info */ |
259 | memcpy(params->eddbuf, boot_params.eddbuf, | |
260 | EDDMAXNR * sizeof(struct edd_info)); | |
261 | params->eddbuf_entries = boot_params.eddbuf_entries; | |
262 | ||
263 | memcpy(params->edd_mbr_sig_buffer, boot_params.edd_mbr_sig_buffer, | |
264 | EDD_MBR_SIG_MAX * sizeof(unsigned int)); | |
265 | ||
dd5f7260 | 266 | return ret; |
27f48d3e VG |
267 | } |
268 | ||
f8da964d | 269 | static int bzImage64_probe(const char *buf, unsigned long len) |
27f48d3e VG |
270 | { |
271 | int ret = -ENOEXEC; | |
272 | struct setup_header *header; | |
273 | ||
274 | /* kernel should be atleast two sectors long */ | |
275 | if (len < 2 * 512) { | |
276 | pr_err("File is too short to be a bzImage\n"); | |
277 | return ret; | |
278 | } | |
279 | ||
280 | header = (struct setup_header *)(buf + offsetof(struct boot_params, hdr)); | |
281 | if (memcmp((char *)&header->header, "HdrS", 4) != 0) { | |
282 | pr_err("Not a bzImage\n"); | |
283 | return ret; | |
284 | } | |
285 | ||
286 | if (header->boot_flag != 0xAA55) { | |
287 | pr_err("No x86 boot sector present\n"); | |
288 | return ret; | |
289 | } | |
290 | ||
291 | if (header->version < 0x020C) { | |
292 | pr_err("Must be at least protocol version 2.12\n"); | |
293 | return ret; | |
294 | } | |
295 | ||
296 | if (!(header->loadflags & LOADED_HIGH)) { | |
297 | pr_err("zImage not a bzImage\n"); | |
298 | return ret; | |
299 | } | |
300 | ||
301 | if (!(header->xloadflags & XLF_KERNEL_64)) { | |
302 | pr_err("Not a bzImage64. XLF_KERNEL_64 is not set.\n"); | |
303 | return ret; | |
304 | } | |
305 | ||
306 | if (!(header->xloadflags & XLF_CAN_BE_LOADED_ABOVE_4G)) { | |
307 | pr_err("XLF_CAN_BE_LOADED_ABOVE_4G is not set.\n"); | |
308 | return ret; | |
309 | } | |
310 | ||
6a2c20e7 VG |
311 | /* |
312 | * Can't handle 32bit EFI as it does not allow loading kernel | |
313 | * above 4G. This should be handled by 32bit bzImage loader | |
314 | */ | |
315 | if (efi_enabled(EFI_RUNTIME_SERVICES) && !efi_enabled(EFI_64BIT)) { | |
316 | pr_debug("EFI is 32 bit. Can't load kernel above 4G.\n"); | |
317 | return ret; | |
318 | } | |
319 | ||
27f48d3e VG |
320 | /* I've got a bzImage */ |
321 | pr_debug("It's a relocatable bzImage64\n"); | |
322 | ret = 0; | |
323 | ||
324 | return ret; | |
325 | } | |
326 | ||
f8da964d VG |
327 | static void *bzImage64_load(struct kimage *image, char *kernel, |
328 | unsigned long kernel_len, char *initrd, | |
329 | unsigned long initrd_len, char *cmdline, | |
330 | unsigned long cmdline_len) | |
27f48d3e VG |
331 | { |
332 | ||
333 | struct setup_header *header; | |
334 | int setup_sects, kern16_size, ret = 0; | |
6a2c20e7 | 335 | unsigned long setup_header_size, params_cmdline_sz, params_misc_sz; |
27f48d3e VG |
336 | struct boot_params *params; |
337 | unsigned long bootparam_load_addr, kernel_load_addr, initrd_load_addr; | |
338 | unsigned long purgatory_load_addr; | |
339 | unsigned long kernel_bufsz, kernel_memsz, kernel_align; | |
340 | char *kernel_buf; | |
341 | struct bzimage64_data *ldata; | |
342 | struct kexec_entry64_regs regs64; | |
343 | void *stack; | |
344 | unsigned int setup_hdr_offset = offsetof(struct boot_params, hdr); | |
6a2c20e7 | 345 | unsigned int efi_map_offset, efi_map_sz, efi_setup_data_offset; |
27f48d3e VG |
346 | |
347 | header = (struct setup_header *)(kernel + setup_hdr_offset); | |
348 | setup_sects = header->setup_sects; | |
349 | if (setup_sects == 0) | |
350 | setup_sects = 4; | |
351 | ||
352 | kern16_size = (setup_sects + 1) * 512; | |
353 | if (kernel_len < kern16_size) { | |
354 | pr_err("bzImage truncated\n"); | |
355 | return ERR_PTR(-ENOEXEC); | |
356 | } | |
357 | ||
358 | if (cmdline_len > header->cmdline_size) { | |
359 | pr_err("Kernel command line too long\n"); | |
360 | return ERR_PTR(-EINVAL); | |
361 | } | |
362 | ||
dd5f7260 VG |
363 | /* |
364 | * In case of crash dump, we will append elfcorehdr=<addr> to | |
365 | * command line. Make sure it does not overflow | |
366 | */ | |
367 | if (cmdline_len + MAX_ELFCOREHDR_STR_LEN > header->cmdline_size) { | |
368 | pr_debug("Appending elfcorehdr=<addr> to command line exceeds maximum allowed length\n"); | |
369 | return ERR_PTR(-EINVAL); | |
370 | } | |
371 | ||
372 | /* Allocate and load backup region */ | |
373 | if (image->type == KEXEC_TYPE_CRASH) { | |
374 | ret = crash_load_segments(image); | |
375 | if (ret) | |
376 | return ERR_PTR(ret); | |
377 | } | |
378 | ||
27f48d3e VG |
379 | /* |
380 | * Load purgatory. For 64bit entry point, purgatory code can be | |
381 | * anywhere. | |
382 | */ | |
383 | ret = kexec_load_purgatory(image, MIN_PURGATORY_ADDR, ULONG_MAX, 1, | |
384 | &purgatory_load_addr); | |
385 | if (ret) { | |
386 | pr_err("Loading purgatory failed\n"); | |
387 | return ERR_PTR(ret); | |
388 | } | |
389 | ||
390 | pr_debug("Loaded purgatory at 0x%lx\n", purgatory_load_addr); | |
391 | ||
6a2c20e7 VG |
392 | |
393 | /* | |
394 | * Load Bootparams and cmdline and space for efi stuff. | |
395 | * | |
396 | * Allocate memory together for multiple data structures so | |
397 | * that they all can go in single area/segment and we don't | |
398 | * have to create separate segment for each. Keeps things | |
399 | * little bit simple | |
400 | */ | |
401 | efi_map_sz = efi_get_runtime_map_size(); | |
402 | efi_map_sz = ALIGN(efi_map_sz, 16); | |
dd5f7260 VG |
403 | params_cmdline_sz = sizeof(struct boot_params) + cmdline_len + |
404 | MAX_ELFCOREHDR_STR_LEN; | |
6a2c20e7 VG |
405 | params_cmdline_sz = ALIGN(params_cmdline_sz, 16); |
406 | params_misc_sz = params_cmdline_sz + efi_map_sz + | |
407 | sizeof(struct setup_data) + | |
408 | sizeof(struct efi_setup_data); | |
409 | ||
410 | params = kzalloc(params_misc_sz, GFP_KERNEL); | |
27f48d3e VG |
411 | if (!params) |
412 | return ERR_PTR(-ENOMEM); | |
6a2c20e7 VG |
413 | efi_map_offset = params_cmdline_sz; |
414 | efi_setup_data_offset = efi_map_offset + efi_map_sz; | |
27f48d3e VG |
415 | |
416 | /* Copy setup header onto bootparams. Documentation/x86/boot.txt */ | |
417 | setup_header_size = 0x0202 + kernel[0x0201] - setup_hdr_offset; | |
418 | ||
419 | /* Is there a limit on setup header size? */ | |
420 | memcpy(¶ms->hdr, (kernel + setup_hdr_offset), setup_header_size); | |
421 | ||
6a2c20e7 VG |
422 | ret = kexec_add_buffer(image, (char *)params, params_misc_sz, |
423 | params_misc_sz, 16, MIN_BOOTPARAM_ADDR, | |
27f48d3e VG |
424 | ULONG_MAX, 1, &bootparam_load_addr); |
425 | if (ret) | |
426 | goto out_free_params; | |
6a2c20e7 VG |
427 | pr_debug("Loaded boot_param, command line and misc at 0x%lx bufsz=0x%lx memsz=0x%lx\n", |
428 | bootparam_load_addr, params_misc_sz, params_misc_sz); | |
27f48d3e VG |
429 | |
430 | /* Load kernel */ | |
431 | kernel_buf = kernel + kern16_size; | |
432 | kernel_bufsz = kernel_len - kern16_size; | |
433 | kernel_memsz = PAGE_ALIGN(header->init_size); | |
434 | kernel_align = header->kernel_alignment; | |
435 | ||
436 | ret = kexec_add_buffer(image, kernel_buf, | |
437 | kernel_bufsz, kernel_memsz, kernel_align, | |
438 | MIN_KERNEL_LOAD_ADDR, ULONG_MAX, 1, | |
439 | &kernel_load_addr); | |
440 | if (ret) | |
441 | goto out_free_params; | |
442 | ||
443 | pr_debug("Loaded 64bit kernel at 0x%lx bufsz=0x%lx memsz=0x%lx\n", | |
444 | kernel_load_addr, kernel_memsz, kernel_memsz); | |
445 | ||
446 | /* Load initrd high */ | |
447 | if (initrd) { | |
448 | ret = kexec_add_buffer(image, initrd, initrd_len, initrd_len, | |
449 | PAGE_SIZE, MIN_INITRD_LOAD_ADDR, | |
450 | ULONG_MAX, 1, &initrd_load_addr); | |
451 | if (ret) | |
452 | goto out_free_params; | |
453 | ||
454 | pr_debug("Loaded initrd at 0x%lx bufsz=0x%lx memsz=0x%lx\n", | |
455 | initrd_load_addr, initrd_len, initrd_len); | |
456 | ||
457 | setup_initrd(params, initrd_load_addr, initrd_len); | |
458 | } | |
459 | ||
dd5f7260 VG |
460 | setup_cmdline(image, params, bootparam_load_addr, |
461 | sizeof(struct boot_params), cmdline, cmdline_len); | |
27f48d3e VG |
462 | |
463 | /* bootloader info. Do we need a separate ID for kexec kernel loader? */ | |
464 | params->hdr.type_of_loader = 0x0D << 4; | |
465 | params->hdr.loadflags = 0; | |
466 | ||
467 | /* Setup purgatory regs for entry */ | |
468 | ret = kexec_purgatory_get_set_symbol(image, "entry64_regs", ®s64, | |
469 | sizeof(regs64), 1); | |
470 | if (ret) | |
471 | goto out_free_params; | |
472 | ||
473 | regs64.rbx = 0; /* Bootstrap Processor */ | |
474 | regs64.rsi = bootparam_load_addr; | |
475 | regs64.rip = kernel_load_addr + 0x200; | |
476 | stack = kexec_purgatory_get_symbol_addr(image, "stack_end"); | |
477 | if (IS_ERR(stack)) { | |
478 | pr_err("Could not find address of symbol stack_end\n"); | |
479 | ret = -EINVAL; | |
480 | goto out_free_params; | |
481 | } | |
482 | ||
483 | regs64.rsp = (unsigned long)stack; | |
484 | ret = kexec_purgatory_get_set_symbol(image, "entry64_regs", ®s64, | |
485 | sizeof(regs64), 0); | |
486 | if (ret) | |
487 | goto out_free_params; | |
488 | ||
6a2c20e7 VG |
489 | ret = setup_boot_parameters(image, params, bootparam_load_addr, |
490 | efi_map_offset, efi_map_sz, | |
491 | efi_setup_data_offset); | |
dd5f7260 VG |
492 | if (ret) |
493 | goto out_free_params; | |
27f48d3e VG |
494 | |
495 | /* Allocate loader specific data */ | |
496 | ldata = kzalloc(sizeof(struct bzimage64_data), GFP_KERNEL); | |
497 | if (!ldata) { | |
498 | ret = -ENOMEM; | |
499 | goto out_free_params; | |
500 | } | |
501 | ||
502 | /* | |
503 | * Store pointer to params so that it could be freed after loading | |
504 | * params segment has been loaded and contents have been copied | |
505 | * somewhere else. | |
506 | */ | |
507 | ldata->bootparams_buf = params; | |
508 | return ldata; | |
509 | ||
510 | out_free_params: | |
511 | kfree(params); | |
512 | return ERR_PTR(ret); | |
513 | } | |
514 | ||
515 | /* This cleanup function is called after various segments have been loaded */ | |
f8da964d | 516 | static int bzImage64_cleanup(void *loader_data) |
27f48d3e VG |
517 | { |
518 | struct bzimage64_data *ldata = loader_data; | |
519 | ||
520 | if (!ldata) | |
521 | return 0; | |
522 | ||
523 | kfree(ldata->bootparams_buf); | |
524 | ldata->bootparams_buf = NULL; | |
525 | ||
526 | return 0; | |
527 | } | |
528 | ||
8e7d8381 | 529 | #ifdef CONFIG_KEXEC_BZIMAGE_VERIFY_SIG |
f8da964d | 530 | static int bzImage64_verify_sig(const char *kernel, unsigned long kernel_len) |
8e7d8381 VG |
531 | { |
532 | bool trusted; | |
533 | int ret; | |
534 | ||
535 | ret = verify_pefile_signature(kernel, kernel_len, | |
536 | system_trusted_keyring, &trusted); | |
537 | if (ret < 0) | |
538 | return ret; | |
539 | if (!trusted) | |
540 | return -EKEYREJECTED; | |
541 | return 0; | |
542 | } | |
543 | #endif | |
544 | ||
27f48d3e VG |
545 | struct kexec_file_ops kexec_bzImage64_ops = { |
546 | .probe = bzImage64_probe, | |
547 | .load = bzImage64_load, | |
548 | .cleanup = bzImage64_cleanup, | |
8e7d8381 VG |
549 | #ifdef CONFIG_KEXEC_BZIMAGE_VERIFY_SIG |
550 | .verify_sig = bzImage64_verify_sig, | |
551 | #endif | |
27f48d3e | 552 | }; |