diff options
Diffstat (limited to 'kernel/kexec_internal.h')
| -rw-r--r-- | kernel/kexec_internal.h | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/kernel/kexec_internal.h b/kernel/kexec_internal.h new file mode 100644 index 0000000000..74da1409cd --- /dev/null +++ b/kernel/kexec_internal.h @@ -0,0 +1,39 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef LINUX_KEXEC_INTERNAL_H +#define LINUX_KEXEC_INTERNAL_H + +#include <linux/kexec.h> + +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 */ |