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