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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 | 11 | enum { |
0102752e FW |
12 | HW_BREAKPOINT_EMPTY = 0, |
13 | HW_BREAKPOINT_R = 1, | |
14 | HW_BREAKPOINT_W = 2, | |
15 | HW_BREAKPOINT_RW = HW_BREAKPOINT_R | HW_BREAKPOINT_W, | |
16 | HW_BREAKPOINT_X = 4, | |
17 | HW_BREAKPOINT_INVALID = HW_BREAKPOINT_RW | HW_BREAKPOINT_X, | |
24f1e32c FW |
18 | }; |
19 | ||
feef47d0 FW |
20 | enum bp_type_idx { |
21 | TYPE_INST = 0, | |
22 | #ifdef CONFIG_HAVE_MIXED_BREAKPOINTS_REGS | |
23 | TYPE_DATA = 0, | |
24 | #else | |
25 | TYPE_DATA = 1, | |
26 | #endif | |
27 | TYPE_MAX | |
28 | }; | |
29 | ||
5093ebad | 30 | #ifdef __KERNEL__ |
688bcaff | 31 | |
e6db4876 FW |
32 | #include <linux/perf_event.h> |
33 | ||
fa7c27ee FW |
34 | #ifdef CONFIG_HAVE_HW_BREAKPOINT |
35 | ||
dd1853c3 FW |
36 | static inline void hw_breakpoint_init(struct perf_event_attr *attr) |
37 | { | |
ed872d09 FW |
38 | memset(attr, 0, sizeof(*attr)); |
39 | ||
dd1853c3 FW |
40 | attr->type = PERF_TYPE_BREAKPOINT; |
41 | attr->size = sizeof(*attr); | |
b326e956 FW |
42 | /* |
43 | * As it's for in-kernel or ptrace use, we want it to be pinned | |
44 | * and to call its callback every hits. | |
45 | */ | |
dd1853c3 | 46 | attr->pinned = 1; |
b326e956 | 47 | attr->sample_period = 1; |
73266fc1 FW |
48 | } |
49 | ||
50 | static inline void ptrace_breakpoint_init(struct perf_event_attr *attr) | |
51 | { | |
52 | hw_breakpoint_init(attr); | |
53 | attr->exclude_kernel = 1; | |
dd1853c3 FW |
54 | } |
55 | ||
24f1e32c FW |
56 | static inline unsigned long hw_breakpoint_addr(struct perf_event *bp) |
57 | { | |
58 | return bp->attr.bp_addr; | |
59 | } | |
60 | ||
61 | static inline int hw_breakpoint_type(struct perf_event *bp) | |
62 | { | |
63 | return bp->attr.bp_type; | |
64 | } | |
65 | ||
cd757645 | 66 | static inline unsigned long hw_breakpoint_len(struct perf_event *bp) |
24f1e32c FW |
67 | { |
68 | return bp->attr.bp_len; | |
69 | } | |
70 | ||
24f1e32c | 71 | extern struct perf_event * |
5fa10b28 | 72 | register_user_hw_breakpoint(struct perf_event_attr *attr, |
b326e956 | 73 | perf_overflow_handler_t triggered, |
5fa10b28 | 74 | struct task_struct *tsk); |
24f1e32c FW |
75 | |
76 | /* FIXME: only change from the attr, and don't unregister */ | |
44234adc | 77 | extern int |
2f0993e0 | 78 | modify_user_hw_breakpoint(struct perf_event *bp, struct perf_event_attr *attr); |
b332828c | 79 | |
b332828c P |
80 | /* |
81 | * Kernel breakpoints are not associated with any particular thread. | |
82 | */ | |
24f1e32c | 83 | extern struct perf_event * |
dd1853c3 | 84 | register_wide_hw_breakpoint_cpu(struct perf_event_attr *attr, |
b326e956 | 85 | perf_overflow_handler_t triggered, |
dd1853c3 | 86 | int cpu); |
24f1e32c | 87 | |
44ee6358 | 88 | extern struct perf_event * __percpu * |
dd1853c3 | 89 | register_wide_hw_breakpoint(struct perf_event_attr *attr, |
b326e956 | 90 | perf_overflow_handler_t triggered); |
24f1e32c FW |
91 | |
92 | extern int register_perf_hw_breakpoint(struct perf_event *bp); | |
93 | extern int __register_perf_hw_breakpoint(struct perf_event *bp); | |
94 | extern void unregister_hw_breakpoint(struct perf_event *bp); | |
44ee6358 | 95 | extern void unregister_wide_hw_breakpoint(struct perf_event * __percpu *cpu_events); |
24f1e32c | 96 | |
5352ae63 JW |
97 | extern int dbg_reserve_bp_slot(struct perf_event *bp); |
98 | extern int dbg_release_bp_slot(struct perf_event *bp); | |
24f1e32c FW |
99 | extern int reserve_bp_slot(struct perf_event *bp); |
100 | extern void release_bp_slot(struct perf_event *bp); | |
101 | ||
102 | extern void flush_ptrace_hw_breakpoint(struct task_struct *tsk); | |
103 | ||
687b16fb FW |
104 | static inline struct arch_hw_breakpoint *counter_arch_bp(struct perf_event *bp) |
105 | { | |
106 | return &bp->hw.info; | |
107 | } | |
108 | ||
24f1e32c FW |
109 | #else /* !CONFIG_HAVE_HW_BREAKPOINT */ |
110 | ||
111 | static inline struct perf_event * | |
5fa10b28 | 112 | register_user_hw_breakpoint(struct perf_event_attr *attr, |
b326e956 | 113 | perf_overflow_handler_t triggered, |
5fa10b28 | 114 | struct task_struct *tsk) { return NULL; } |
44234adc | 115 | static inline int |
24f1e32c | 116 | modify_user_hw_breakpoint(struct perf_event *bp, |
99ac64c8 | 117 | struct perf_event_attr *attr) { return -ENOSYS; } |
24f1e32c | 118 | static inline struct perf_event * |
dd1853c3 | 119 | register_wide_hw_breakpoint_cpu(struct perf_event_attr *attr, |
b326e956 | 120 | perf_overflow_handler_t triggered, |
dd1853c3 | 121 | int cpu) { return NULL; } |
44ee6358 | 122 | static inline struct perf_event * __percpu * |
dd1853c3 | 123 | register_wide_hw_breakpoint(struct perf_event_attr *attr, |
b326e956 | 124 | perf_overflow_handler_t triggered) { return NULL; } |
24f1e32c FW |
125 | static inline int |
126 | register_perf_hw_breakpoint(struct perf_event *bp) { return -ENOSYS; } | |
127 | static inline int | |
128 | __register_perf_hw_breakpoint(struct perf_event *bp) { return -ENOSYS; } | |
129 | static inline void unregister_hw_breakpoint(struct perf_event *bp) { } | |
130 | static inline void | |
44ee6358 | 131 | unregister_wide_hw_breakpoint(struct perf_event * __percpu *cpu_events) { } |
24f1e32c FW |
132 | static inline int |
133 | reserve_bp_slot(struct perf_event *bp) {return -ENOSYS; } | |
134 | static inline void release_bp_slot(struct perf_event *bp) { } | |
135 | ||
136 | static inline void flush_ptrace_hw_breakpoint(struct task_struct *tsk) { } | |
b332828c | 137 | |
687b16fb FW |
138 | static inline struct arch_hw_breakpoint *counter_arch_bp(struct perf_event *bp) |
139 | { | |
140 | return NULL; | |
141 | } | |
142 | ||
24f1e32c | 143 | #endif /* CONFIG_HAVE_HW_BREAKPOINT */ |
5093ebad | 144 | #endif /* __KERNEL__ */ |
b332828c | 145 | |
24f1e32c | 146 | #endif /* _LINUX_HW_BREAKPOINT_H */ |