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hw_breakpoint.h

hw_breakpoint.h 2.0 KB
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  1. /* SPDX-License-Identifier: GPL-2.0 */
    2. 

  2. #ifndef	_I386_HW_BREAKPOINT_H
    3. 

  3. #define	_I386_HW_BREAKPOINT_H
    4. 

  4. 

  5. #include <uapi/asm/hw_breakpoint.h>
    6. 

  6. 

  7. #define	__ARCH_HW_BREAKPOINT_H
    8. 

  8. 

  9. /*
    10. 

  10.  * The name should probably be something dealt in
    11. 

  11.  * a higher level. While dealing with the user
    12. 

  12.  * (display/resolving)
    13. 

  13.  */
    14. 

  14. struct arch_hw_breakpoint {
    15. 

  15. 	unsigned long	address;
    16. 

  16. 	unsigned long	mask;
    17. 

  17. 	u8		len;
    18. 

  18. 	u8		type;
    19. 

  19. };
    20. 

  20. 

  21. #include <linux/kdebug.h>
    22. 

  22. #include <linux/percpu.h>
    23. 

  23. #include <linux/list.h>
    24. 

  24. 

  25. /* Available HW breakpoint length encodings */
    26. 

  26. #define X86_BREAKPOINT_LEN_X		0x40
    27. 

  27. #define X86_BREAKPOINT_LEN_1		0x40
    28. 

  28. #define X86_BREAKPOINT_LEN_2		0x44
    29. 

  29. #define X86_BREAKPOINT_LEN_4		0x4c
    30. 

  30. 

  31. #ifdef CONFIG_X86_64
    32. 

  32. #define X86_BREAKPOINT_LEN_8		0x48
    33. 

  33. #endif
    34. 

  34. 

  35. /* Available HW breakpoint type encodings */
    36. 

  36. 

  37. /* trigger on instruction execute */
    38. 

  38. #define X86_BREAKPOINT_EXECUTE	0x80
    39. 

  39. /* trigger on memory write */
    40. 

  40. #define X86_BREAKPOINT_WRITE	0x81
    41. 

  41. /* trigger on memory read or write */
    42. 

  42. #define X86_BREAKPOINT_RW	0x83
    43. 

  43. 

  44. /* Total number of available HW breakpoint registers */
    45. 

  45. #define HBP_NUM 4
    46. 

  46. 

  47. #define hw_breakpoint_slots(type) (HBP_NUM)
    48. 

  48. 

  49. struct perf_event_attr;
    50. 

  50. struct perf_event;
    51. 

  51. struct pmu;
    52. 

  52. 

  53. extern int arch_check_bp_in_kernelspace(struct arch_hw_breakpoint *hw);
    54. 

  54. extern int hw_breakpoint_arch_parse(struct perf_event *bp,
    55. 

  55. 				    const struct perf_event_attr *attr,
    56. 

  56. 				    struct arch_hw_breakpoint *hw);
    57. 

  57. extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused,
    58. 

  58. 					   unsigned long val, void *data);
    59. 

  59. 

  60. 

  61. int arch_install_hw_breakpoint(struct perf_event *bp);
    62. 

  62. void arch_uninstall_hw_breakpoint(struct perf_event *bp);
    63. 

  63. void hw_breakpoint_pmu_read(struct perf_event *bp);
    64. 

  64. void hw_breakpoint_pmu_unthrottle(struct perf_event *bp);
    65. 

  65. 

  66. extern void
    67. 

  67. arch_fill_perf_breakpoint(struct perf_event *bp);
    68. 

  68. 

  69. unsigned long encode_dr7(int drnum, unsigned int len, unsigned int type);
    70. 

  70. int decode_dr7(unsigned long dr7, int bpnum, unsigned *len, unsigned *type);
    71. 

  71. 

  72. extern int arch_bp_generic_fields(int x86_len, int x86_type,
    73. 

  73. 				  int *gen_len, int *gen_type);
    74. 

  74. 

  75. extern struct pmu perf_ops_bp;
    76. 

  76. 

  77. #endif	/* _I386_HW_BREAKPOINT_H */
    78.