[linux-2.6-block.git] / kernel / kexec_internal.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef LINUX_KEXEC_INTERNAL_H
#define LINUX_KEXEC_INTERNAL_H

#include <linux/kexec.h>

struct kexec_segment;

struct kimage *do_kimage_alloc_init(void);
int sanity_check_segment_list(struct kimage *image);
void kimage_free_page_list(struct list_head *list);
void kimage_free(struct kimage *image);
int kimage_load_segment(struct kimage *image, struct kexec_segment *segment);
void kimage_terminate(struct kimage *image);
int kimage_is_destination_range(struct kimage *image,
				unsigned long start, unsigned long end);

/*
 * Whatever is used to serialize accesses to the kexec_crash_image needs to be
 * NMI safe, as __crash_kexec() can happen during nmi_panic(), so here we use a
 * "simple" atomic variable that is acquired with a cmpxchg().
 */
extern atomic_t __kexec_lock;
static inline bool kexec_trylock(void)
{
	return atomic_cmpxchg_acquire(&__kexec_lock, 0, 1) == 0;
}
static inline void kexec_unlock(void)
{
	atomic_set_release(&__kexec_lock, 0);
}

#ifdef CONFIG_KEXEC_FILE
#include <linux/purgatory.h>
void kimage_file_post_load_cleanup(struct kimage *image);
extern char kexec_purgatory[];
extern size_t kexec_purgatory_size;
#else /* CONFIG_KEXEC_FILE */
static inline void kimage_file_post_load_cleanup(struct kimage *image) { }
#endif /* CONFIG_KEXEC_FILE */
#endif /* LINUX_KEXEC_INTERNAL_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
a43cac0d DY	2	#ifndef LINUX_KEXEC_INTERNAL_H
	3	#define LINUX_KEXEC_INTERNAL_H
	4
	5	#include <linux/kexec.h>
	6
2c44b67e BH	7	struct kexec_segment;
2c44b67e BH	8
a43cac0d DY	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
05c62574 VS	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;
	24	static inline bool kexec_trylock(void)
	25	{
	26	return atomic_cmpxchg_acquire(&__kexec_lock, 0, 1) == 0;
	27	}
	28	static inline void kexec_unlock(void)
	29	{
	30	atomic_set_release(&__kexec_lock, 0);
	31	}
a43cac0d DY	32
a43cac0d DY	33	#ifdef CONFIG_KEXEC_FILE
40c50c1f	34	#include <linux/purgatory.h>
a43cac0d	35	void kimage_file_post_load_cleanup(struct kimage *image);
e2ae8ab4 KC	36	extern char kexec_purgatory[];
e2ae8ab4 KC	37	extern size_t kexec_purgatory_size;
a43cac0d DY	38	#else /* CONFIG_KEXEC_FILE */
	39	static inline void kimage_file_post_load_cleanup(struct kimage *image) { }
	40	#endif /* CONFIG_KEXEC_FILE */
	41	#endif /* LINUX_KEXEC_INTERNAL_H */