kernel/kexec_internal.h

   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;
  24 static inline bool kexec_trylock(void)
  25 {
  26         int old = 0;
  27         return atomic_try_cmpxchg_acquire(&__kexec_lock, &old, 1);
  28 }
  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 */
  40 static inline void kimage_file_post_load_cleanup(struct kimage *image) { }
  41 #endif /* CONFIG_KEXEC_FILE */
  42 #endif /* LINUX_KEXEC_INTERNAL_H */