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1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Copyright (C) 2014 ARM Ltd.
4 */
5#ifndef __ASM_PTDUMP_H
6#define __ASM_PTDUMP_H
7
8#include <linux/ptdump.h>
9
10DECLARE_STATIC_KEY_FALSE(arm64_ptdump_lock_key);
11
12#ifdef CONFIG_PTDUMP
13
14#include <linux/mm_types.h>
15#include <linux/seq_file.h>
16
17struct addr_marker {
18 unsigned long start_address;
19 char *name;
20};
21
22struct ptdump_info {
23 struct mm_struct *mm;
24 const struct addr_marker *markers;
25 unsigned long base_addr;
26};
27
28struct ptdump_prot_bits {
29 ptdesc_t mask;
30 ptdesc_t val;
31 const char *set;
32 const char *clear;
33};
34
35struct ptdump_pg_level {
36 const struct ptdump_prot_bits *bits;
37 char name[4];
38 int num;
39 ptdesc_t mask;
40};
41
42/*
43 * The page dumper groups page table entries of the same type into a single
44 * description. It uses pg_state to track the range information while
45 * iterating over the pte entries. When the continuity is broken it then
46 * dumps out a description of the range.
47 */
48struct ptdump_pg_state {
49 struct ptdump_state ptdump;
50 struct ptdump_pg_level *pg_level;
51 struct seq_file *seq;
52 const struct addr_marker *marker;
53 const struct mm_struct *mm;
54 unsigned long start_address;
55 int level;
56 ptdesc_t current_prot;
57 bool check_wx;
58 unsigned long wx_pages;
59 unsigned long uxn_pages;
60};
61
62void ptdump_walk(struct seq_file *s, struct ptdump_info *info);
63void note_page(struct ptdump_state *pt_st, unsigned long addr, int level,
64 pteval_t val);
65void note_page_pte(struct ptdump_state *st, unsigned long addr, pte_t pte);
66void note_page_pmd(struct ptdump_state *st, unsigned long addr, pmd_t pmd);
67void note_page_pud(struct ptdump_state *st, unsigned long addr, pud_t pud);
68void note_page_p4d(struct ptdump_state *st, unsigned long addr, p4d_t p4d);
69void note_page_pgd(struct ptdump_state *st, unsigned long addr, pgd_t pgd);
70void note_page_flush(struct ptdump_state *st);
71#ifdef CONFIG_PTDUMP_DEBUGFS
72#define EFI_RUNTIME_MAP_END DEFAULT_MAP_WINDOW_64
73void __init ptdump_debugfs_register(struct ptdump_info *info, const char *name);
74#else
75static inline void ptdump_debugfs_register(struct ptdump_info *info,
76 const char *name) { }
77#endif /* CONFIG_PTDUMP_DEBUGFS */
78#else
79static inline void note_page(struct ptdump_state *pt_st, unsigned long addr,
80 int level, pteval_t val) { }
81static inline void note_page_pte(struct ptdump_state *st, unsigned long addr, pte_t pte) { }
82static inline void note_page_pmd(struct ptdump_state *st, unsigned long addr, pmd_t pmd) { }
83static inline void note_page_pud(struct ptdump_state *st, unsigned long addr, pud_t pud) { }
84static inline void note_page_p4d(struct ptdump_state *st, unsigned long addr, p4d_t p4d) { }
85static inline void note_page_pgd(struct ptdump_state *st, unsigned long addr, pgd_t pgd) { }
86static inline void note_page_flush(struct ptdump_state *st) { }
87#endif /* CONFIG_PTDUMP */
88
89#endif /* __ASM_PTDUMP_H */