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