kernel/kexec.c:33:16: error: call to undeclared function 'phys_to_boot_phys'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
33 | if ((entry < phys_to_boot_phys(crashk_res.start)) ||
| ^
kernel/kexec.c:43:7: error: incomplete definition of type 'struct kimage'
43 | image->start = entry;
| ~~~~~^
kernel/kexec_internal.h:7:8: note: forward declaration of 'struct kimage'
7 | struct kimage *do_kimage_alloc_init(void);
| ^
kernel/kexec.c:44:7: error: incomplete definition of type 'struct kimage'
44 | image->nr_segments = nr_segments;
| ~~~~~^
kernel/kexec_internal.h:7:8: note: forward declaration of 'struct kimage'
7 | struct kimage *do_kimage_alloc_init(void);
| ^
kernel/kexec.c:45:55: error: invalid application of 'sizeof' to an incomplete type 'struct kexec_segment'
45 | memcpy(image->segment, segments, nr_segments * sizeof(*segments));
| ^~~~~~~~~~~
include/linux/fortify-string.h:693:53: note: expanded from macro 'memcpy'
693 | #define memcpy(p, q, s) __fortify_memcpy_chk(p, q, s, \
| ^
include/linux/fortify-string.h:636:41: note: expanded from macro '__fortify_memcpy_chk'
636 | const size_t __fortify_size = (size_t)(size); \
| ^~~~
include/linux/syscalls.h:20:8: note: forward declaration of 'struct kexec_segment'
20 | struct kexec_segment;
| ^
kernel/kexec.c:45:14: error: incomplete definition of type 'struct kimage'
45 | memcpy(image->segment, segments, nr_segments * sizeof(*segments));
| ~~~~~^
include/linux/fortify-string.h:694:17: note: expanded from macro 'memcpy'
694 | __struct_size(p), __struct_size(q), \
| ^
include/linux/fortify-string.h:96:56: note: expanded from macro '__struct_size'
96 | #define __struct_size(p) __builtin_dynamic_object_size(p, 0)
| ^
include/linux/fortify-string.h:637:27: note: expanded from macro '__fortify_memcpy_chk'
637 | const size_t __p_size = (p_size); \
| ^~~~~~
kernel/kexec_internal.h:7:8: note: forward declaration of 'struct kimage'
7 | struct kimage *do_kimage_alloc_init(void);
| ^
kernel/kexec.c:45:14: error: incomplete definition of type 'struct kimage'
45 | memcpy(image->segment, segments, nr_segments * sizeof(*segments));
| ~~~~~^
include/linux/fortify-string.h:695:17: note: expanded from macro 'memcpy'
695 | __member_size(p), __member_size(q), \
| ^
include/linux/fortify-string.h:97:56: note: expanded from macro '__member_size'
97 | #define __member_size(p) __builtin_dynamic_object_size(p, 1)
| ^
include/linux/fortify-string.h:639:33: note: expanded from macro '__fortify_memcpy_chk'
639 | const size_t __p_size_field = (p_size_field); \
| ^~~~~~~~~~~~
kernel/kexec_internal.h:7:8: note: forward declaration of 'struct kimage'
7 | struct kimage *do_kimage_alloc_init(void);
| ^
kernel/kexec.c:45:14: error: incomplete definition of type 'struct kimage'
45 | memcpy(image->segment, segments, nr_segments * sizeof(*segments));
| ~~~~~^
include/linux/fortify-string.h:693:47: note: expanded from macro 'memcpy'
693 | #define memcpy(p, q, s) __fortify_memcpy_chk(p, q, s, \
| ^
include/linux/fortify-string.h:648:20: note: expanded from macro '__fortify_memcpy_chk'
648 | __underlying_##op(p, q, __fortify_size); \
| ^
kernel/kexec_internal.h:7:8: note: forward declaration of 'struct kimage'
7 | struct kimage *do_kimage_alloc_init(void);
| ^
kernel/kexec.c:49:8: error: incomplete definition of type 'struct kimage'
49 | image->control_page = crashk_res.start;
| ~~~~~^
kernel/kexec_internal.h:7:8: note: forward declaration of 'struct kimage'
7 | struct kimage *do_kimage_alloc_init(void);
| ^
kernel/kexec.c:50:8: error: incomplete definition of type 'struct kimage'
50 | image->type = KEXEC_TYPE_CRASH;
| ~~~~~^
kernel/kexec_internal.h:7:8: note: forward declaration of 'struct kimage'
7 | struct kimage *do_kimage_alloc_init(void);
| ^
kernel/kexec.c:50:17: error: use of undeclared identifier 'KEXEC_TYPE_CRASH'
50 | image->type = KEXEC_TYPE_CRASH;
| ^
kernel/kexec.c:63:7: error: incomplete definition of type 'struct kimage'
63 | image->control_code_page = kimage_alloc_control_pages(image,
| ~~~~~^
kernel/kexec_internal.h:7:8: note: forward declaration of 'struct kimage'
7 | struct kimage *do_kimage_alloc_init(void);
| ^
kernel/kexec.c:63:29: error: call to undeclared function 'kimage_alloc_control_pages'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
63 | image->control_code_page = kimage_alloc_control_pages(image,
| ^
kernel/kexec.c:64:19: error: use of undeclared identifier 'KEXEC_CONTROL_PAGE_SIZE'
64 | get_order(KEXEC_CONTROL_PAGE_SIZE));
| ^
kernel/kexec.c:65:12: error: incomplete definition of type 'struct kimage'
65 | if (!image->control_code_page) {
| ~~~~~^
kernel/kexec_internal.h:7:8: note: forward declaration of 'struct kimage'
7 | struct kimage *do_kimage_alloc_init(void);
| ^
kernel/kexec.c:71:8: error: incomplete definition of type 'struct kimage'
71 | image->swap_page = kimage_alloc_control_pages(image, 0);
| ~~~~~^
kernel/kexec_internal.h:7:8: note: forward declaration of 'struct kimage'
7 | struct kimage *do_kimage_alloc_init(void);
| ^
kernel/kexec.c:72:13: error: incomplete definition of type 'struct kimage'
72 | if (!image->swap_page) {
| ~~~~~^
kernel/kexec_internal.h:7:8: note: forward declaration of 'struct kimage'
7 | struct kimage *do_kimage_alloc_init(void);
| ^
kernel/kexec.c:81:30: error: incomplete definition of type 'struct kimage'
81 | kimage_free_page_list(&image->control_pages);
| ~~~~~^
kernel/kexec_internal.h:7:8: note: forward declaration of 'struct kimage'
7 | struct kimage *do_kimage_alloc_init(void);
| ^
kernel/kexec.c:103:17: error: use of undeclared identifier 'kexec_crash_image'; did you mean 'kexec_crash_loaded'?
103 | dest_image = &kexec_crash_image;
| ^~~~~~~~~~~~~~~~~
| kexec_crash_loaded
include/linux/kexec.h:499:19: note: 'kexec_crash_loaded' declared here
499 | static inline int kexec_crash_loaded(void) { return 0; }
| ^
kernel/kexec.c:104:7: error: use of undeclared identifier 'kexec_crash_image'; did you mean 'kexec_crash_loaded'?
104 | if (kexec_crash_image)
| ^~~~~~~~~~~~~~~~~
| kexec_crash_loaded
include/linux/kexec.h:499:19: note: 'kexec_crash_loaded' declared here
499 | static inline int kexec_crash_loaded(void) { return 0; }
| ^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
20 errors generated.
--
arch/arm/kernel/machine_kexec.c:33:34: warning: declaration of 'struct kimage' will not be visible outside of this function [-Wvisibility]
33 | int machine_kexec_prepare(struct kimage *image)
| ^
arch/arm/kernel/machine_kexec.c:39:7: error: incomplete definition of type 'struct kimage'
39 | image->arch.kernel_r2 = image->start - KEXEC_ARM_ZIMAGE_OFFSET
| ~~~~~^
arch/arm/kernel/machine_kexec.c:33:34: note: forward declaration of 'struct kimage'
33 | int machine_kexec_prepare(struct kimage *image)
| ^
arch/arm/kernel/machine_kexec.c:39:31: error: incomplete definition of type 'struct kimage'
39 | image->arch.kernel_r2 = image->start - KEXEC_ARM_ZIMAGE_OFFSET
| ~~~~~^
arch/arm/kernel/machine_kexec.c:33:34: note: forward declaration of 'struct kimage'
33 | int machine_kexec_prepare(struct kimage *image)
| ^
arch/arm/kernel/machine_kexec.c:39:41: error: use of undeclared identifier 'KEXEC_ARM_ZIMAGE_OFFSET'
39 | image->arch.kernel_r2 = image->start - KEXEC_ARM_ZIMAGE_OFFSET
| ^
arch/arm/kernel/machine_kexec.c:40:12: error: use of undeclared identifier 'KEXEC_ARM_ATAGS_OFFSET'
40 | + KEXEC_ARM_ATAGS_OFFSET;
| ^
arch/arm/kernel/machine_kexec.c:55:23: error: incomplete definition of type 'struct kimage'
55 | for (i = 0; i < image->nr_segments; i++) {
| ~~~~~^
arch/arm/kernel/machine_kexec.c:33:34: note: forward declaration of 'struct kimage'
33 | int machine_kexec_prepare(struct kimage *image)
| ^
arch/arm/kernel/machine_kexec.c:56:27: error: incomplete definition of type 'struct kimage'
56 | current_segment = &image->segment[i];
| ~~~~~^
arch/arm/kernel/machine_kexec.c:33:34: note: forward declaration of 'struct kimage'
33 | int machine_kexec_prepare(struct kimage *image)
| ^
arch/arm/kernel/machine_kexec.c:58:63: error: incomplete definition of type 'struct kexec_segment'
58 | if (!memblock_is_region_memory(idmap_to_phys(current_segment->mem),
| ~~~~~~~~~~~~~~~^
arch/arm/kernel/machine_kexec.c:35:9: note: forward declaration of 'struct kexec_segment'
35 | struct kexec_segment *current_segment;
| ^
arch/arm/kernel/machine_kexec.c:59:28: error: incomplete definition of type 'struct kexec_segment'
59 | current_segment->memsz))
| ~~~~~~~~~~~~~~~^
arch/arm/kernel/machine_kexec.c:35:9: note: forward declaration of 'struct kexec_segment'
35 | struct kexec_segment *current_segment;
| ^
arch/arm/kernel/machine_kexec.c:62:50: error: incomplete definition of type 'struct kexec_segment'
62 | err = get_user(header, (__be32*)current_segment->buf);
| ~~~~~~~~~~~~~~~^
arch/arm/include/asm/uaccess.h:229:38: note: expanded from macro 'get_user'
229 | #define get_user(x, p) __get_user(x, p)
| ^
arch/arm/include/asm/uaccess.h:258:23: note: expanded from macro '__get_user'
258 | __get_user_err((x), (ptr), __gu_err, TUSER()); \
| ^~~
arch/arm/include/asm/uaccess.h:264:44: note: expanded from macro '__get_user_err'
264 | unsigned long __gu_addr = (unsigned long)(ptr); \
| ^~~
arch/arm/kernel/machine_kexec.c:35:9: note: forward declaration of 'struct kexec_segment'
35 | struct kexec_segment *current_segment;
| ^
arch/arm/kernel/machine_kexec.c:62:50: error: incomplete definition of type 'struct kexec_segment'
62 | err = get_user(header, (__be32*)current_segment->buf);
| ~~~~~~~~~~~~~~~^
arch/arm/include/asm/uaccess.h:229:38: note: expanded from macro 'get_user'
229 | #define get_user(x, p) __get_user(x, p)
| ^
arch/arm/include/asm/uaccess.h:258:23: note: expanded from macro '__get_user'
258 | __get_user_err((x), (ptr), __gu_err, TUSER()); \
| ^~~
arch/arm/include/asm/uaccess.h:270:19: note: expanded from macro '__get_user_err'
270 | switch (sizeof(*(ptr))) { \
| ^~~
arch/arm/kernel/machine_kexec.c:35:9: note: forward declaration of 'struct kexec_segment'
35 | struct kexec_segment *current_segment;
| ^
arch/arm/kernel/machine_kexec.c:62:50: error: incomplete definition of type 'struct kexec_segment'
62 | err = get_user(header, (__be32*)current_segment->buf);
| ~~~~~~~~~~~~~~~^
arch/arm/include/asm/uaccess.h:229:38: note: expanded from macro 'get_user'
229 | #define get_user(x, p) __get_user(x, p)
| ^
arch/arm/include/asm/uaccess.h:258:23: note: expanded from macro '__get_user'
258 | __get_user_err((x), (ptr), __gu_err, TUSER()); \
| ^~~
arch/arm/include/asm/uaccess.h:277:22: note: expanded from macro '__get_user_err'
277 | (x) = (__typeof__(*(ptr)))__gu_val; \
| ^~~
arch/arm/kernel/machine_kexec.c:35:9: note: forward declaration of 'struct kexec_segment'
35 | struct kexec_segment *current_segment;
| ^
arch/arm/kernel/machine_kexec.c:67:9: error: incomplete definition of type 'struct kimage'
67 | image->arch.kernel_r2 = current_segment->mem;
| ~~~~~^
arch/arm/kernel/machine_kexec.c:33:34: note: forward declaration of 'struct kimage'
33 | int machine_kexec_prepare(struct kimage *image)
| ^
arch/arm/kernel/machine_kexec.c:67:43: error: incomplete definition of type 'struct kexec_segment'
67 | image->arch.kernel_r2 = current_segment->mem;
| ~~~~~~~~~~~~~~~^
arch/arm/kernel/machine_kexec.c:35:9: note: forward declaration of 'struct kexec_segment'
35 | struct kexec_segment *current_segment;
| ^
arch/arm/kernel/machine_kexec.c:33:5: warning: no previous prototype for function 'machine_kexec_prepare' [-Wmissing-prototypes]
33 | int machine_kexec_prepare(struct kimage *image)
| ^
arch/arm/kernel/machine_kexec.c:33:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
33 | int machine_kexec_prepare(struct kimage *image)
| ^
| static
arch/arm/kernel/machine_kexec.c:72:35: warning: declaration of 'struct kimage' will not be visible outside of this function [-Wvisibility]
72 | void machine_kexec_cleanup(struct kimage *image)
| ^
arch/arm/kernel/machine_kexec.c:72:6: warning: no previous prototype for function 'machine_kexec_cleanup' [-Wmissing-prototypes]
72 | void machine_kexec_cleanup(struct kimage *image)
| ^
arch/arm/kernel/machine_kexec.c:72:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
72 | void machine_kexec_cleanup(struct kimage *image)
| ^
| static
arch/arm/kernel/machine_kexec.c:82:2: error: call to undeclared function 'crash_setup_regs'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
82 | crash_setup_regs(®s, get_irq_regs());
| ^
arch/arm/kernel/machine_kexec.c:85:2: error: call to undeclared function 'crash_save_cpu'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
85 | crash_save_cpu(®s, smp_processor_id());
| ^
arch/arm/kernel/machine_kexec.c:146:2: error: call to undeclared function 'crash_save_cpu'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
146 | crash_save_cpu(regs, smp_processor_id());
| ^
arch/arm/kernel/machine_kexec.c:152:27: warning: declaration of 'struct kimage' will not be visible outside of this function [-Wvisibility]
152 | void machine_kexec(struct kimage *image)
| ^
arch/arm/kernel/machine_kexec.c:167:19: error: incomplete definition of type 'struct kimage'
167 | page_list = image->head & PAGE_MASK;
| ~~~~~^
arch/arm/kernel/machine_kexec.c:152:27: note: forward declaration of 'struct kimage'
152 | void machine_kexec(struct kimage *image)
| ^
arch/arm/kernel/machine_kexec.c:169:41: error: incomplete definition of type 'struct kimage'
169 | reboot_code_buffer = page_address(image->control_code_page);
| ~~~~~^
include/linux/mm.h:2144:48: note: expanded from macro 'page_address'
2144 | #define page_address(page) lowmem_page_address(page)
| ^~~~
arch/arm/kernel/machine_kexec.c:152:27: note: forward declaration of 'struct kimage'
152 | void machine_kexec(struct kimage *image)
| ^
arch/arm/kernel/machine_kexec.c:177:35: error: incomplete definition of type 'struct kimage'
177 | data->kexec_start_address = image->start;
| ~~~~~^
arch/arm/kernel/machine_kexec.c:152:27: note: forward declaration of 'struct kimage'
152 | void machine_kexec(struct kimage *image)
| ^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
5 warnings and 20 errors generated.
--
arch/arm/kernel/setup.c:1034:49: error: use of undeclared identifier 'SECTION_SIZE'
1034 | start = memblock_phys_alloc_range(crash_size, SECTION_SIZE,
| ^
1 error generated.
Kconfig warnings: (for reference only)
WARNING: unmet direct dependencies detected for KEXEC
Depends on [n]: ARCH_SUPPORTS_KEXEC [=n]
Selected by [y]:
- CRASH_DUMP [=y] && ARCH_SUPPORTS_CRASH_DUMP [=y]
vim +/phys_to_boot_phys +33 kernel/kexec.c
a43cac0d9dc207 Dave Young 2015-09-09 21
255aedd90e3e80 Vivek Goyal 2014-08-08 22 static int kimage_alloc_init(struct kimage **rimage, unsigned long entry,
72414d3f1d22fc Maneesh Soni 2005-06-25 23 unsigned long nr_segments,
5d700a0fd71ded Arnd Bergmann 2021-09-08 24 struct kexec_segment *segments,
255aedd90e3e80 Vivek Goyal 2014-08-08 25 unsigned long flags)
dc009d92435f99 Eric W. Biederman 2005-06-25 26 {
255aedd90e3e80 Vivek Goyal 2014-08-08 27 int ret;
dc009d92435f99 Eric W. Biederman 2005-06-25 28 struct kimage *image;
255aedd90e3e80 Vivek Goyal 2014-08-08 29 bool kexec_on_panic = flags & KEXEC_ON_CRASH;
255aedd90e3e80 Vivek Goyal 2014-08-08 30
255aedd90e3e80 Vivek Goyal 2014-08-08 31 if (kexec_on_panic) {
255aedd90e3e80 Vivek Goyal 2014-08-08 32 /* Verify we have a valid entry point */
43546d8669d62d Russell King 2016-08-02 @33 if ((entry < phys_to_boot_phys(crashk_res.start)) ||
43546d8669d62d Russell King 2016-08-02 34 (entry > phys_to_boot_phys(crashk_res.end)))
255aedd90e3e80 Vivek Goyal 2014-08-08 35 return -EADDRNOTAVAIL;
255aedd90e3e80 Vivek Goyal 2014-08-08 36 }
dc009d92435f99 Eric W. Biederman 2005-06-25 37
dc009d92435f99 Eric W. Biederman 2005-06-25 38 /* Allocate and initialize a controlling structure */
dabe78628dd886 Vivek Goyal 2014-08-08 39 image = do_kimage_alloc_init();
dabe78628dd886 Vivek Goyal 2014-08-08 40 if (!image)
dabe78628dd886 Vivek Goyal 2014-08-08 41 return -ENOMEM;
dabe78628dd886 Vivek Goyal 2014-08-08 42
dabe78628dd886 Vivek Goyal 2014-08-08 @43 image->start = entry;
5d700a0fd71ded Arnd Bergmann 2021-09-08 @44 image->nr_segments = nr_segments;
5d700a0fd71ded Arnd Bergmann 2021-09-08 @45 memcpy(image->segment, segments, nr_segments * sizeof(*segments));
dabe78628dd886 Vivek Goyal 2014-08-08 46
255aedd90e3e80 Vivek Goyal 2014-08-08 47 if (kexec_on_panic) {
cdf4b3fa03bab1 Xunlei Pang 2016-01-20 48 /* Enable special crash kernel control page alloc policy. */
255aedd90e3e80 Vivek Goyal 2014-08-08 49 image->control_page = crashk_res.start;
255aedd90e3e80 Vivek Goyal 2014-08-08 @50 image->type = KEXEC_TYPE_CRASH;
255aedd90e3e80 Vivek Goyal 2014-08-08 51 }
255aedd90e3e80 Vivek Goyal 2014-08-08 52
cdf4b3fa03bab1 Xunlei Pang 2016-01-20 53 ret = sanity_check_segment_list(image);
cdf4b3fa03bab1 Xunlei Pang 2016-01-20 54 if (ret)
cdf4b3fa03bab1 Xunlei Pang 2016-01-20 55 goto out_free_image;
cdf4b3fa03bab1 Xunlei Pang 2016-01-20 56
dc009d92435f99 Eric W. Biederman 2005-06-25 57 /*
dc009d92435f99 Eric W. Biederman 2005-06-25 58 * Find a location for the control code buffer, and add it
dc009d92435f99 Eric W. Biederman 2005-06-25 59 * the vector of segments so that it's pages will also be
dc009d92435f99 Eric W. Biederman 2005-06-25 60 * counted as destination pages.
dc009d92435f99 Eric W. Biederman 2005-06-25 61 */
255aedd90e3e80 Vivek Goyal 2014-08-08 62 ret = -ENOMEM;
dc009d92435f99 Eric W. Biederman 2005-06-25 @63 image->control_code_page = kimage_alloc_control_pages(image,
163f6876f5c3ff Huang Ying 2008-08-15 @64 get_order(KEXEC_CONTROL_PAGE_SIZE));
dc009d92435f99 Eric W. Biederman 2005-06-25 65 if (!image->control_code_page) {
e1bebcf41ed0aa Fabian Frederick 2014-06-06 66 pr_err("Could not allocate control_code_buffer\n");
2965faa5e03d1e Dave Young 2015-09-09 67 goto out_free_image;
dc009d92435f99 Eric W. Biederman 2005-06-25 68 }
dd5f726076cc76 Vivek Goyal 2014-08-08 69
2965faa5e03d1e Dave Young 2015-09-09 70 if (!kexec_on_panic) {
2965faa5e03d1e Dave Young 2015-09-09 71 image->swap_page = kimage_alloc_control_pages(image, 0);
2965faa5e03d1e Dave Young 2015-09-09 72 if (!image->swap_page) {
2965faa5e03d1e Dave Young 2015-09-09 73 pr_err("Could not allocate swap buffer\n");
2965faa5e03d1e Dave Young 2015-09-09 74 goto out_free_control_pages;
dc009d92435f99 Eric W. Biederman 2005-06-25 75 }
dc009d92435f99 Eric W. Biederman 2005-06-25 76 }
72414d3f1d22fc Maneesh Soni 2005-06-25 77
2965faa5e03d1e Dave Young 2015-09-09 78 *rimage = image;
2965faa5e03d1e Dave Young 2015-09-09 79 return 0;
2965faa5e03d1e Dave Young 2015-09-09 80 out_free_control_pages:
2965faa5e03d1e Dave Young 2015-09-09 @81 kimage_free_page_list(&image->control_pages);
2965faa5e03d1e Dave Young 2015-09-09 82 out_free_image:
2965faa5e03d1e Dave Young 2015-09-09 83 kfree(image);
2965faa5e03d1e Dave Young 2015-09-09 84 return ret;
dc009d92435f99 Eric W. Biederman 2005-06-25 85 }
dc009d92435f99 Eric W. Biederman 2005-06-25 86
0eea08678ebe9f Minfei Huang 2016-05-23 87 static int do_kexec_load(unsigned long entry, unsigned long nr_segments,
5d700a0fd71ded Arnd Bergmann 2021-09-08 88 struct kexec_segment *segments, unsigned long flags)
0eea08678ebe9f Minfei Huang 2016-05-23 89 {
0eea08678ebe9f Minfei Huang 2016-05-23 90 struct kimage **dest_image, *image;
0eea08678ebe9f Minfei Huang 2016-05-23 91 unsigned long i;
0eea08678ebe9f Minfei Huang 2016-05-23 92 int ret;
0eea08678ebe9f Minfei Huang 2016-05-23 93
4b692e86161935 Arnd Bergmann 2021-09-08 94 /*
4b692e86161935 Arnd Bergmann 2021-09-08 95 * Because we write directly to the reserved memory region when loading
05c6257433b721 Valentin Schneider 2022-06-30 96 * crash kernels we need a serialization here to prevent multiple crash
05c6257433b721 Valentin Schneider 2022-06-30 97 * kernels from attempting to load simultaneously.
4b692e86161935 Arnd Bergmann 2021-09-08 98 */
05c6257433b721 Valentin Schneider 2022-06-30 99 if (!kexec_trylock())
4b692e86161935 Arnd Bergmann 2021-09-08 100 return -EBUSY;
4b692e86161935 Arnd Bergmann 2021-09-08 101
0eea08678ebe9f Minfei Huang 2016-05-23 102 if (flags & KEXEC_ON_CRASH) {
0eea08678ebe9f Minfei Huang 2016-05-23 @103 dest_image = &kexec_crash_image;
0eea08678ebe9f Minfei Huang 2016-05-23 104 if (kexec_crash_image)
0eea08678ebe9f Minfei Huang 2016-05-23 105 arch_kexec_unprotect_crashkres();
0eea08678ebe9f Minfei Huang 2016-05-23 106 } else {
0eea08678ebe9f Minfei Huang 2016-05-23 107 dest_image = &kexec_image;
0eea08678ebe9f Minfei Huang 2016-05-23 108 }
0eea08678ebe9f Minfei Huang 2016-05-23 109
0eea08678ebe9f Minfei Huang 2016-05-23 110 if (nr_segments == 0) {
0eea08678ebe9f Minfei Huang 2016-05-23 111 /* Uninstall image */
0eea08678ebe9f Minfei Huang 2016-05-23 112 kimage_free(xchg(dest_image, NULL));
4b692e86161935 Arnd Bergmann 2021-09-08 113 ret = 0;
4b692e86161935 Arnd Bergmann 2021-09-08 114 goto out_unlock;
0eea08678ebe9f Minfei Huang 2016-05-23 115 }
0eea08678ebe9f Minfei Huang 2016-05-23 116 if (flags & KEXEC_ON_CRASH) {
0eea08678ebe9f Minfei Huang 2016-05-23 117 /*
0eea08678ebe9f Minfei Huang 2016-05-23 118 * Loading another kernel to switch to if this one
0eea08678ebe9f Minfei Huang 2016-05-23 119 * crashes. Free any current crash dump kernel before
0eea08678ebe9f Minfei Huang 2016-05-23 120 * we corrupt it.
0eea08678ebe9f Minfei Huang 2016-05-23 121 */
0eea08678ebe9f Minfei Huang 2016-05-23 122 kimage_free(xchg(&kexec_crash_image, NULL));
0eea08678ebe9f Minfei Huang 2016-05-23 123 }
0eea08678ebe9f Minfei Huang 2016-05-23 124
0eea08678ebe9f Minfei Huang 2016-05-23 125 ret = kimage_alloc_init(&image, entry, nr_segments, segments, flags);
0eea08678ebe9f Minfei Huang 2016-05-23 126 if (ret)
4b692e86161935 Arnd Bergmann 2021-09-08 127 goto out_unlock;
0eea08678ebe9f Minfei Huang 2016-05-23 128
0eea08678ebe9f Minfei Huang 2016-05-23 129 if (flags & KEXEC_PRESERVE_CONTEXT)
0eea08678ebe9f Minfei Huang 2016-05-23 130 image->preserve_context = 1;
0eea08678ebe9f Minfei Huang 2016-05-23 131
0eea08678ebe9f Minfei Huang 2016-05-23 132 ret = machine_kexec_prepare(image);
0eea08678ebe9f Minfei Huang 2016-05-23 133 if (ret)
0eea08678ebe9f Minfei Huang 2016-05-23 134 goto out;
0eea08678ebe9f Minfei Huang 2016-05-23 135
1229384f5b856d Xunlei Pang 2017-07-12 136 /*
1229384f5b856d Xunlei Pang 2017-07-12 137 * Some architecture(like S390) may touch the crash memory before
1229384f5b856d Xunlei Pang 2017-07-12 138 * machine_kexec_prepare(), we must copy vmcoreinfo data after it.
1229384f5b856d Xunlei Pang 2017-07-12 139 */
1229384f5b856d Xunlei Pang 2017-07-12 140 ret = kimage_crash_copy_vmcoreinfo(image);
1229384f5b856d Xunlei Pang 2017-07-12 141 if (ret)
1229384f5b856d Xunlei Pang 2017-07-12 142 goto out;
1229384f5b856d Xunlei Pang 2017-07-12 143
0eea08678ebe9f Minfei Huang 2016-05-23 144 for (i = 0; i < nr_segments; i++) {
0eea08678ebe9f Minfei Huang 2016-05-23 145 ret = kimage_load_segment(image, &image->segment[i]);
0eea08678ebe9f Minfei Huang 2016-05-23 146 if (ret)
0eea08678ebe9f Minfei Huang 2016-05-23 147 goto out;
0eea08678ebe9f Minfei Huang 2016-05-23 148 }
0eea08678ebe9f Minfei Huang 2016-05-23 149
0eea08678ebe9f Minfei Huang 2016-05-23 150 kimage_terminate(image);
0eea08678ebe9f Minfei Huang 2016-05-23 151
de68e4daea9084 Pavel Tatashin 2019-12-04 152 ret = machine_kexec_post_load(image);
de68e4daea9084 Pavel Tatashin 2019-12-04 153 if (ret)
de68e4daea9084 Pavel Tatashin 2019-12-04 154 goto out;
de68e4daea9084 Pavel Tatashin 2019-12-04 155
0eea08678ebe9f Minfei Huang 2016-05-23 156 /* Install the new kernel and uninstall the old */
0eea08678ebe9f Minfei Huang 2016-05-23 157 image = xchg(dest_image, image);
0eea08678ebe9f Minfei Huang 2016-05-23 158
0eea08678ebe9f Minfei Huang 2016-05-23 159 out:
0eea08678ebe9f Minfei Huang 2016-05-23 160 if ((flags & KEXEC_ON_CRASH) && kexec_crash_image)
0eea08678ebe9f Minfei Huang 2016-05-23 161 arch_kexec_protect_crashkres();
0eea08678ebe9f Minfei Huang 2016-05-23 162
0eea08678ebe9f Minfei Huang 2016-05-23 163 kimage_free(image);
4b692e86161935 Arnd Bergmann 2021-09-08 164 out_unlock:
05c6257433b721 Valentin Schneider 2022-06-30 165 kexec_unlock();
0eea08678ebe9f Minfei Huang 2016-05-23 166 return ret;
0eea08678ebe9f Minfei Huang 2016-05-23 167 }
0eea08678ebe9f Minfei Huang 2016-05-23 168
:::::: The code at line 33 was first introduced by commit
:::::: 43546d8669d62d75fa69ca9a45d2f586665f56bd kexec: allow architectures to override boot mapping
:::::: TO: Russell King <rmk+kernel@xxxxxxxxxxxxxxxx>
:::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
