Commit | Line | Data |
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2da3e160 FW |
1 | #ifndef _LINUX_HW_BREAKPOINT_H |
2 | #define _LINUX_HW_BREAKPOINT_H | |
b332828c | 3 | |
24f1e32c FW |
4 | enum { |
5 | HW_BREAKPOINT_LEN_1 = 1, | |
6 | HW_BREAKPOINT_LEN_2 = 2, | |
7 | HW_BREAKPOINT_LEN_4 = 4, | |
8 | HW_BREAKPOINT_LEN_8 = 8, | |
b332828c P |
9 | }; |
10 | ||
24f1e32c FW |
11 | enum { |
12 | HW_BREAKPOINT_R = 1, | |
13 | HW_BREAKPOINT_W = 2, | |
14 | HW_BREAKPOINT_X = 4, | |
15 | }; | |
16 | ||
5093ebad | 17 | #ifdef __KERNEL__ |
688bcaff | 18 | |
e6db4876 FW |
19 | #include <linux/perf_event.h> |
20 | ||
fa7c27ee FW |
21 | #ifdef CONFIG_HAVE_HW_BREAKPOINT |
22 | ||
dd1853c3 FW |
23 | static inline void hw_breakpoint_init(struct perf_event_attr *attr) |
24 | { | |
ed872d09 FW |
25 | memset(attr, 0, sizeof(*attr)); |
26 | ||
dd1853c3 FW |
27 | attr->type = PERF_TYPE_BREAKPOINT; |
28 | attr->size = sizeof(*attr); | |
b326e956 FW |
29 | /* |
30 | * As it's for in-kernel or ptrace use, we want it to be pinned | |
31 | * and to call its callback every hits. | |
32 | */ | |
dd1853c3 | 33 | attr->pinned = 1; |
b326e956 | 34 | attr->sample_period = 1; |
dd1853c3 FW |
35 | } |
36 | ||
24f1e32c FW |
37 | static inline unsigned long hw_breakpoint_addr(struct perf_event *bp) |
38 | { | |
39 | return bp->attr.bp_addr; | |
40 | } | |
41 | ||
42 | static inline int hw_breakpoint_type(struct perf_event *bp) | |
43 | { | |
44 | return bp->attr.bp_type; | |
45 | } | |
46 | ||
47 | static inline int hw_breakpoint_len(struct perf_event *bp) | |
48 | { | |
49 | return bp->attr.bp_len; | |
50 | } | |
51 | ||
24f1e32c | 52 | extern struct perf_event * |
5fa10b28 | 53 | register_user_hw_breakpoint(struct perf_event_attr *attr, |
b326e956 | 54 | perf_overflow_handler_t triggered, |
5fa10b28 | 55 | struct task_struct *tsk); |
24f1e32c FW |
56 | |
57 | /* FIXME: only change from the attr, and don't unregister */ | |
44234adc | 58 | extern int |
2f0993e0 | 59 | modify_user_hw_breakpoint(struct perf_event *bp, struct perf_event_attr *attr); |
b332828c | 60 | |
b332828c P |
61 | /* |
62 | * Kernel breakpoints are not associated with any particular thread. | |
63 | */ | |
24f1e32c | 64 | extern struct perf_event * |
dd1853c3 | 65 | register_wide_hw_breakpoint_cpu(struct perf_event_attr *attr, |
b326e956 | 66 | perf_overflow_handler_t triggered, |
dd1853c3 | 67 | int cpu); |
24f1e32c FW |
68 | |
69 | extern struct perf_event ** | |
dd1853c3 | 70 | register_wide_hw_breakpoint(struct perf_event_attr *attr, |
b326e956 | 71 | perf_overflow_handler_t triggered); |
24f1e32c FW |
72 | |
73 | extern int register_perf_hw_breakpoint(struct perf_event *bp); | |
74 | extern int __register_perf_hw_breakpoint(struct perf_event *bp); | |
75 | extern void unregister_hw_breakpoint(struct perf_event *bp); | |
76 | extern void unregister_wide_hw_breakpoint(struct perf_event **cpu_events); | |
77 | ||
78 | extern int reserve_bp_slot(struct perf_event *bp); | |
79 | extern void release_bp_slot(struct perf_event *bp); | |
80 | ||
81 | extern void flush_ptrace_hw_breakpoint(struct task_struct *tsk); | |
82 | ||
687b16fb FW |
83 | static inline struct arch_hw_breakpoint *counter_arch_bp(struct perf_event *bp) |
84 | { | |
85 | return &bp->hw.info; | |
86 | } | |
87 | ||
24f1e32c FW |
88 | #else /* !CONFIG_HAVE_HW_BREAKPOINT */ |
89 | ||
90 | static inline struct perf_event * | |
5fa10b28 | 91 | register_user_hw_breakpoint(struct perf_event_attr *attr, |
b326e956 | 92 | perf_overflow_handler_t triggered, |
5fa10b28 | 93 | struct task_struct *tsk) { return NULL; } |
44234adc | 94 | static inline int |
24f1e32c | 95 | modify_user_hw_breakpoint(struct perf_event *bp, |
99ac64c8 | 96 | struct perf_event_attr *attr) { return -ENOSYS; } |
24f1e32c | 97 | static inline struct perf_event * |
dd1853c3 | 98 | register_wide_hw_breakpoint_cpu(struct perf_event_attr *attr, |
b326e956 | 99 | perf_overflow_handler_t triggered, |
dd1853c3 | 100 | int cpu) { return NULL; } |
24f1e32c | 101 | static inline struct perf_event ** |
dd1853c3 | 102 | register_wide_hw_breakpoint(struct perf_event_attr *attr, |
b326e956 | 103 | perf_overflow_handler_t triggered) { return NULL; } |
24f1e32c FW |
104 | static inline int |
105 | register_perf_hw_breakpoint(struct perf_event *bp) { return -ENOSYS; } | |
106 | static inline int | |
107 | __register_perf_hw_breakpoint(struct perf_event *bp) { return -ENOSYS; } | |
108 | static inline void unregister_hw_breakpoint(struct perf_event *bp) { } | |
109 | static inline void | |
110 | unregister_wide_hw_breakpoint(struct perf_event **cpu_events) { } | |
111 | static inline int | |
112 | reserve_bp_slot(struct perf_event *bp) {return -ENOSYS; } | |
113 | static inline void release_bp_slot(struct perf_event *bp) { } | |
114 | ||
115 | static inline void flush_ptrace_hw_breakpoint(struct task_struct *tsk) { } | |
b332828c | 116 | |
687b16fb FW |
117 | static inline struct arch_hw_breakpoint *counter_arch_bp(struct perf_event *bp) |
118 | { | |
119 | return NULL; | |
120 | } | |
121 | ||
24f1e32c | 122 | #endif /* CONFIG_HAVE_HW_BREAKPOINT */ |
5093ebad | 123 | #endif /* __KERNEL__ */ |
b332828c | 124 | |
24f1e32c | 125 | #endif /* _LINUX_HW_BREAKPOINT_H */ |