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
10 DECLARE_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
17 struct addr_marker {
18 unsigned long start_address;
19 char *name;
20 };
21
22 struct ptdump_info {
23 struct mm_struct *mm;
24 const struct addr_marker *markers;
25 unsigned long base_addr;
26 };
27
28 struct ptdump_prot_bits {
29 ptdesc_t mask;
30 ptdesc_t val;
31 const char *set;
32 const char *clear;
33 };
34
35 struct 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 */
48 struct 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
62 void ptdump_walk(struct seq_file *s, struct ptdump_info *info);
63 void note_page(struct ptdump_state *pt_st, unsigned long addr, int level,
64 pteval_t val);
65 void note_page_pte(struct ptdump_state *st, unsigned long addr, pte_t pte);
66 void note_page_pmd(struct ptdump_state *st, unsigned long addr, pmd_t pmd);
67 void note_page_pud(struct ptdump_state *st, unsigned long addr, pud_t pud);
68 void note_page_p4d(struct ptdump_state *st, unsigned long addr, p4d_t p4d);
69 void note_page_pgd(struct ptdump_state *st, unsigned long addr, pgd_t pgd);
70 void note_page_flush(struct ptdump_state *st);
71 #ifdef CONFIG_PTDUMP_DEBUGFS
72 #define EFI_RUNTIME_MAP_END DEFAULT_MAP_WINDOW_64
73 void __init ptdump_debugfs_register(struct ptdump_info *info, const char *name);
74 #else
ptdump_debugfs_register(struct ptdump_info * info,const char * name)75 static inline void ptdump_debugfs_register(struct ptdump_info *info,
76 const char *name) { }
77 #endif /* CONFIG_PTDUMP_DEBUGFS */
78 #else
note_page(struct ptdump_state * pt_st,unsigned long addr,int level,pteval_t val)79 static inline void note_page(struct ptdump_state *pt_st, unsigned long addr,
80 int level, pteval_t val) { }
note_page_pte(struct ptdump_state * st,unsigned long addr,pte_t pte)81 static inline void note_page_pte(struct ptdump_state *st, unsigned long addr, pte_t pte) { }
note_page_pmd(struct ptdump_state * st,unsigned long addr,pmd_t pmd)82 static inline void note_page_pmd(struct ptdump_state *st, unsigned long addr, pmd_t pmd) { }
note_page_pud(struct ptdump_state * st,unsigned long addr,pud_t pud)83 static inline void note_page_pud(struct ptdump_state *st, unsigned long addr, pud_t pud) { }
note_page_p4d(struct ptdump_state * st,unsigned long addr,p4d_t p4d)84 static inline void note_page_p4d(struct ptdump_state *st, unsigned long addr, p4d_t p4d) { }
note_page_pgd(struct ptdump_state * st,unsigned long addr,pgd_t pgd)85 static inline void note_page_pgd(struct ptdump_state *st, unsigned long addr, pgd_t pgd) { }
note_page_flush(struct ptdump_state * st)86 static inline void note_page_flush(struct ptdump_state *st) { }
87 #endif /* CONFIG_PTDUMP */
88
89 #endif /* __ASM_PTDUMP_H */
90