/* SPDX-License-Identifier: GPL-2.0 */
  
  #ifndef _LINUX_PTDUMP_H
  #define _LINUX_PTDUMP_H
  
  #include <linux/mm_types.h>
  
  struct ptdump_range {
  	unsigned long start;
  	unsigned long end;
  };
  
  struct ptdump_state {

  	/* level is 0:PGD to 4:PTE, or -1 if unknown */

  	void (*note_page)(struct ptdump_state *st, unsigned long addr,

  			  int level, u64 val);

  	void (*effective_prot)(struct ptdump_state *st, int level, u64 val);

  	const struct ptdump_range *range;
  };

  void ptdump_walk_pgd(struct ptdump_state *st, struct mm_struct *mm, pgd_t *pgd);

  
  #endif /* _LINUX_PTDUMP_H */