arch/arm64/include/asm/ptdump.h

   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_CORE
  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         u64             mask;
  28         u64             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         u64 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         u64 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                u64 val);
  63 #ifdef CONFIG_PTDUMP_DEBUGFS
  64 #define EFI_RUNTIME_MAP_END     DEFAULT_MAP_WINDOW_64
  65 void __init ptdump_debugfs_register(struct ptdump_info *info, const char *name);
  66 #else
  67 static inline void ptdump_debugfs_register(struct ptdump_info *info,
  68                                            const char *name) { }
  69 #endif /* CONFIG_PTDUMP_DEBUGFS */
  70 #else
  71 static inline void note_page(struct ptdump_state *pt_st, unsigned long addr,
  72                              int level, u64 val) { }
  73 #endif /* CONFIG_PTDUMP_CORE */
  74
  75 #endif /* __ASM_PTDUMP_H */