diff options
Diffstat (limited to 'kernel/kexec_internal.h')
| -rw-r--r-- | kernel/kexec_internal.h | 36 |
1 files changed, 34 insertions, 2 deletions
diff --git a/kernel/kexec_internal.h b/kernel/kexec_internal.h index 48aaf2ac0d0d..228bb88c018b 100644 --- a/kernel/kexec_internal.h +++ b/kernel/kexec_internal.h @@ -4,16 +4,32 @@ #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); +int kimage_load_segment(struct kimage *image, int idx); void kimage_terminate(struct kimage *image); int kimage_is_destination_range(struct kimage *image, unsigned long start, unsigned long end); -extern struct mutex kexec_mutex; +/* + * 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) +{ + int old = 0; + return atomic_try_cmpxchg_acquire(&__kexec_lock, &old, 1); +} +static inline void kexec_unlock(void) +{ + atomic_set_release(&__kexec_lock, 0); +} #ifdef CONFIG_KEXEC_FILE #include <linux/purgatory.h> @@ -23,4 +39,20 @@ 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 */ + +struct kexec_buf; + +#ifdef CONFIG_KEXEC_HANDOVER +int kho_locate_mem_hole(struct kexec_buf *kbuf, + int (*func)(struct resource *, void *)); +int kho_fill_kimage(struct kimage *image); +#else +static inline int kho_locate_mem_hole(struct kexec_buf *kbuf, + int (*func)(struct resource *, void *)) +{ + return 1; +} + +static inline int kho_fill_kimage(struct kimage *image) { return 0; } +#endif /* CONFIG_KEXEC_HANDOVER */ #endif /* LINUX_KEXEC_INTERNAL_H */ |