1 /* SPDX-License-Identifier: GPL-2.0 */ 1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef LINUX_KEXEC_INTERNAL_H 2 #ifndef LINUX_KEXEC_INTERNAL_H
3 #define LINUX_KEXEC_INTERNAL_H 3 #define LINUX_KEXEC_INTERNAL_H
4 4
5 #include <linux/kexec.h> 5 #include <linux/kexec.h>
6 6
7 struct kexec_segment; 7 struct kexec_segment;
8 8
9 struct kimage *do_kimage_alloc_init(void); 9 struct kimage *do_kimage_alloc_init(void);
10 int sanity_check_segment_list(struct kimage *i 10 int sanity_check_segment_list(struct kimage *image);
11 void kimage_free_page_list(struct list_head *l 11 void kimage_free_page_list(struct list_head *list);
12 void kimage_free(struct kimage *image); 12 void kimage_free(struct kimage *image);
13 int kimage_load_segment(struct kimage *image, 13 int kimage_load_segment(struct kimage *image, struct kexec_segment *segment);
14 void kimage_terminate(struct kimage *image); 14 void kimage_terminate(struct kimage *image);
15 int kimage_is_destination_range(struct kimage 15 int kimage_is_destination_range(struct kimage *image,
16 unsigned long 16 unsigned long start, unsigned long end);
17 17
18 /* 18 /*
19 * Whatever is used to serialize accesses to t 19 * Whatever is used to serialize accesses to the kexec_crash_image needs to be
20 * NMI safe, as __crash_kexec() can happen dur 20 * NMI safe, as __crash_kexec() can happen during nmi_panic(), so here we use a
21 * "simple" atomic variable that is acquired w 21 * "simple" atomic variable that is acquired with a cmpxchg().
22 */ 22 */
23 extern atomic_t __kexec_lock; 23 extern atomic_t __kexec_lock;
24 static inline bool kexec_trylock(void) 24 static inline bool kexec_trylock(void)
25 { 25 {
26 return atomic_cmpxchg_acquire(&__kexec 26 return atomic_cmpxchg_acquire(&__kexec_lock, 0, 1) == 0;
27 } 27 }
28 static inline void kexec_unlock(void) 28 static inline void kexec_unlock(void)
29 { 29 {
30 atomic_set_release(&__kexec_lock, 0); 30 atomic_set_release(&__kexec_lock, 0);
31 } 31 }
32 32
33 #ifdef CONFIG_KEXEC_FILE 33 #ifdef CONFIG_KEXEC_FILE
34 #include <linux/purgatory.h> 34 #include <linux/purgatory.h>
35 void kimage_file_post_load_cleanup(struct kima 35 void kimage_file_post_load_cleanup(struct kimage *image);
36 extern char kexec_purgatory[]; 36 extern char kexec_purgatory[];
37 extern size_t kexec_purgatory_size; 37 extern size_t kexec_purgatory_size;
38 #else /* CONFIG_KEXEC_FILE */ 38 #else /* CONFIG_KEXEC_FILE */
39 static inline void kimage_file_post_load_clean 39 static inline void kimage_file_post_load_cleanup(struct kimage *image) { }
40 #endif /* CONFIG_KEXEC_FILE */ 40 #endif /* CONFIG_KEXEC_FILE */
41 #endif /* LINUX_KEXEC_INTERNAL_H */ 41 #endif /* LINUX_KEXEC_INTERNAL_H */
42 42
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