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ARK-OS
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arkos
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kernel
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arch
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arm64
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include
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asm
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ptdump.h

ptdump.h 2.8 KB
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  1. /* SPDX-License-Identifier: GPL-2.0-only */
    2. 

  2. /*
    3. 

  3.  * Copyright (C) 2014 ARM Ltd.
    4. 

  4.  */
    5. 

  5. #ifndef __ASM_PTDUMP_H
    6. 

  6. #define __ASM_PTDUMP_H
    7. 

  7. 

  8. #include <linux/ptdump.h>
    9. 

  9. 

  10. DECLARE_STATIC_KEY_FALSE(arm64_ptdump_lock_key);
    11. 

  11. 

  12. #ifdef CONFIG_PTDUMP
    13. 

  13. 

  14. #include <linux/mm_types.h>
    15. 

  15. #include <linux/seq_file.h>
    16. 

  16. 

  17. struct addr_marker {
    18. 

  18. 	unsigned long start_address;
    19. 

  19. 	char *name;
    20. 

  20. };
    21. 

  21. 

  22. struct ptdump_info {
    23. 

  23. 	struct mm_struct		*mm;
    24. 

  24. 	const struct addr_marker	*markers;
    25. 

  25. 	unsigned long			base_addr;
    26. 

  26. };
    27. 

  27. 

  28. struct ptdump_prot_bits {
    29. 

  29. 	ptdesc_t	mask;
    30. 

  30. 	ptdesc_t	val;
    31. 

  31. 	const char	*set;
    32. 

  32. 	const char	*clear;
    33. 

  33. };
    34. 

  34. 

  35. struct ptdump_pg_level {
    36. 

  36. 	const struct ptdump_prot_bits *bits;
    37. 

  37. 	char name[4];
    38. 

  38. 	int num;
    39. 

  39. 	ptdesc_t mask;
    40. 

  40. };
    41. 

  41. 

  42. /*
    43. 

  43.  * The page dumper groups page table entries of the same type into a single
    44. 

  44.  * description. It uses pg_state to track the range information while
    45. 

  45.  * iterating over the pte entries. When the continuity is broken it then
    46. 

  46.  * dumps out a description of the range.
    47. 

  47.  */
    48. 

  48. struct ptdump_pg_state {
    49. 

  49. 	struct ptdump_state ptdump;
    50. 

  50. 	struct ptdump_pg_level *pg_level;
    51. 

  51. 	struct seq_file *seq;
    52. 

  52. 	const struct addr_marker *marker;
    53. 

  53. 	const struct mm_struct *mm;
    54. 

  54. 	unsigned long start_address;
    55. 

  55. 	int level;
    56. 

  56. 	ptdesc_t current_prot;
    57. 

  57. 	bool check_wx;
    58. 

  58. 	unsigned long wx_pages;
    59. 

  59. 	unsigned long uxn_pages;
    60. 

  60. };
    61. 

  61. 

  62. void ptdump_walk(struct seq_file *s, struct ptdump_info *info);
    63. 

  63. void note_page(struct ptdump_state *pt_st, unsigned long addr, int level,
    64. 

  64. 	       pteval_t val);
    65. 

  65. void note_page_pte(struct ptdump_state *st, unsigned long addr, pte_t pte);
    66. 

  66. void note_page_pmd(struct ptdump_state *st, unsigned long addr, pmd_t pmd);
    67. 

  67. void note_page_pud(struct ptdump_state *st, unsigned long addr, pud_t pud);
    68. 

  68. void note_page_p4d(struct ptdump_state *st, unsigned long addr, p4d_t p4d);
    69. 

  69. void note_page_pgd(struct ptdump_state *st, unsigned long addr, pgd_t pgd);
    70. 

  70. void note_page_flush(struct ptdump_state *st);
    71. 

  71. #ifdef CONFIG_PTDUMP_DEBUGFS
    72. 

  72. #define EFI_RUNTIME_MAP_END	DEFAULT_MAP_WINDOW_64
    73. 

  73. void __init ptdump_debugfs_register(struct ptdump_info *info, const char *name);
    74. 

  74. #else
    75. 

  75. static inline void ptdump_debugfs_register(struct ptdump_info *info,
    76. 

  76. 					   const char *name) { }
    77. 

  77. #endif /* CONFIG_PTDUMP_DEBUGFS */
    78. 

  78. #else
    79. 

  79. static inline void note_page(struct ptdump_state *pt_st, unsigned long addr,
    80. 

  80. 			     int level, pteval_t val) { }
    81. 

  81. static inline void note_page_pte(struct ptdump_state *st, unsigned long addr, pte_t pte) { }
    82. 

  82. static inline void note_page_pmd(struct ptdump_state *st, unsigned long addr, pmd_t pmd) { }
    83. 

  83. static inline void note_page_pud(struct ptdump_state *st, unsigned long addr, pud_t pud) { }
    84. 

  84. static inline void note_page_p4d(struct ptdump_state *st, unsigned long addr, p4d_t p4d) { }
    85. 

  85. static inline void note_page_pgd(struct ptdump_state *st, unsigned long addr, pgd_t pgd) { }
    86. 

  86. static inline void note_page_flush(struct ptdump_state *st) { }
    87. 

  87. #endif /* CONFIG_PTDUMP */
    88. 

  88. 

  89. #endif /* __ASM_PTDUMP_H */
    90.