arch/arm64/include/asm/ptdump.h

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright (C) 2014 ARM Ltd.
 */
#ifndef __ASM_PTDUMP_H
#define __ASM_PTDUMP_H

#include <linux/ptdump.h>

#ifdef CONFIG_PTDUMP

#include <linux/mm_types.h>
#include <linux/seq_file.h>

struct addr_marker {
	unsigned long start_address;
	char *name;
};

struct ptdump_info {
	struct mm_struct		*mm;
	const struct addr_marker	*markers;
	unsigned long			base_addr;
};

struct ptdump_prot_bits {
	ptdesc_t	mask;
	ptdesc_t	val;
	const char	*set;
	const char	*clear;
};

struct ptdump_pg_level {
	const struct ptdump_prot_bits *bits;
	char name[4];
	int num;
	ptdesc_t mask;
};

/*
 * The page dumper groups page table entries of the same type into a single
 * description. It uses pg_state to track the range information while
 * iterating over the pte entries. When the continuity is broken it then
 * dumps out a description of the range.
 */
struct ptdump_pg_state {
	struct ptdump_state ptdump;
	struct ptdump_pg_level *pg_level;
	struct seq_file *seq;
	const struct addr_marker *marker;
	const struct mm_struct *mm;
	unsigned long start_address;
	/* exclusive end, ULONG_MAX represents an end at 1 << 64 */
	unsigned long end_address;
	int level;
	ptdesc_t current_prot;
	bool check_wx;
	unsigned long wx_pages;
	unsigned long uxn_pages;
};

void ptdump_walk(struct seq_file *s, struct ptdump_info *info);
void note_page(struct ptdump_state *pt_st, unsigned long addr, int level,
	       pteval_t val);
void note_page_pte(struct ptdump_state *st, unsigned long addr, pte_t pte);
void note_page_pmd(struct ptdump_state *st, unsigned long addr, pmd_t pmd);
void note_page_pud(struct ptdump_state *st, unsigned long addr, pud_t pud);
void note_page_p4d(struct ptdump_state *st, unsigned long addr, p4d_t p4d);
void note_page_pgd(struct ptdump_state *st, unsigned long addr, pgd_t pgd);
void note_page_flush(struct ptdump_state *st);
#ifdef CONFIG_PTDUMP_DEBUGFS
#define EFI_RUNTIME_MAP_END	DEFAULT_MAP_WINDOW_64
void __init ptdump_debugfs_register(struct ptdump_info *info, const char *name);
#else
static inline void ptdump_debugfs_register(struct ptdump_info *info,
					   const char *name) { }
#endif /* CONFIG_PTDUMP_DEBUGFS */
#else
static inline void note_page(struct ptdump_state *pt_st, unsigned long addr,
			     int level, pteval_t val) { }
static inline void note_page_pte(struct ptdump_state *st, unsigned long addr, pte_t pte) { }
static inline void note_page_pmd(struct ptdump_state *st, unsigned long addr, pmd_t pmd) { }
static inline void note_page_pud(struct ptdump_state *st, unsigned long addr, pud_t pud) { }
static inline void note_page_p4d(struct ptdump_state *st, unsigned long addr, p4d_t p4d) { }
static inline void note_page_pgd(struct ptdump_state *st, unsigned long addr, pgd_t pgd) { }
static inline void note_page_flush(struct ptdump_state *st) { }
#endif /* CONFIG_PTDUMP */

#endif /* __ASM_PTDUMP_H */