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 kexec_segment;
8 
9 struct kimage *do_kimage_alloc_init(void);
10 int sanity_check_segment_list(struct kimage *image);
11 void kimage_free_page_list(struct list_head *list);
12 void kimage_free(struct kimage *image);
13 int kimage_load_segment(struct kimage *image, struct kexec_segment *segment);
14 void kimage_terminate(struct kimage *image);
15 int kimage_is_destination_range(struct kimage *image,
16 				unsigned long start, unsigned long end);
17 
18 /*
19  * Whatever is used to serialize accesses to the kexec_crash_image needs to be
20  * NMI safe, as __crash_kexec() can happen during nmi_panic(), so here we use a
21  * "simple" atomic variable that is acquired with a cmpxchg().
22  */
23 extern atomic_t __kexec_lock;
kexec_trylock(void)24 static inline bool kexec_trylock(void)
25 {
26 	int old = 0;
27 	return atomic_try_cmpxchg_acquire(&__kexec_lock, &old, 1);
28 }
kexec_unlock(void)29 static inline void kexec_unlock(void)
30 {
31 	atomic_set_release(&__kexec_lock, 0);
32 }
33 
34 #ifdef CONFIG_KEXEC_FILE
35 #include <linux/purgatory.h>
36 void kimage_file_post_load_cleanup(struct kimage *image);
37 extern char kexec_purgatory[];
38 extern size_t kexec_purgatory_size;
39 #else /* CONFIG_KEXEC_FILE */
kimage_file_post_load_cleanup(struct kimage * image)40 static inline void kimage_file_post_load_cleanup(struct kimage *image) { }
41 #endif /* CONFIG_KEXEC_FILE */
42 #endif /* LINUX_KEXEC_INTERNAL_H */
43