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review.evervolv.com / android_kernel_oneplus_msm8996 / 24f1e32c60c45c89a997c73395b69c8af6f0a84e / . / include / linux / hw_breakpoint.h
blob: 7eba9b92e5f30ca093181bfaf3639d7f6830b7ad [file] [log] [blame]
Frederic Weisbecker2da3e162009-11-05 23:06:50 +0100[diff] [blame]1#ifndef _LINUX_HW_BREAKPOINT_H
2#define _LINUX_HW_BREAKPOINT_H
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]3
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame^]4#include <linux/perf_event.h>
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]5
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame^]6enum {
7 HW_BREAKPOINT_LEN_1 = 1,
8 HW_BREAKPOINT_LEN_2 = 2,
9 HW_BREAKPOINT_LEN_4 = 4,
10 HW_BREAKPOINT_LEN_8 = 8,
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]11};
12
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame^]13enum {
14 HW_BREAKPOINT_R = 1,
15 HW_BREAKPOINT_W = 2,
16 HW_BREAKPOINT_X = 4,
17};
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]18
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame^]19static inline struct arch_hw_breakpoint *counter_arch_bp(struct perf_event *bp)
20{
21 return &bp->hw.info;
22}
23
24static inline unsigned long hw_breakpoint_addr(struct perf_event *bp)
25{
26 return bp->attr.bp_addr;
27}
28
29static inline int hw_breakpoint_type(struct perf_event *bp)
30{
31 return bp->attr.bp_type;
32}
33
34static inline int hw_breakpoint_len(struct perf_event *bp)
35{
36 return bp->attr.bp_len;
37}
38
39#ifdef CONFIG_HAVE_HW_BREAKPOINT
40extern struct perf_event *
41register_user_hw_breakpoint(unsigned long addr,
42 int len,
43 int type,
44 perf_callback_t triggered,
45 struct task_struct *tsk,
46 bool active);
47
48/* FIXME: only change from the attr, and don't unregister */
49extern struct perf_event *
50modify_user_hw_breakpoint(struct perf_event *bp,
51 unsigned long addr,
52 int len,
53 int type,
54 perf_callback_t triggered,
55 struct task_struct *tsk,
56 bool active);
57
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]58/*
59 * Kernel breakpoints are not associated with any particular thread.
60 */
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame^]61extern struct perf_event *
62register_wide_hw_breakpoint_cpu(unsigned long addr,
63 int len,
64 int type,
65 perf_callback_t triggered,
66 int cpu,
67 bool active);
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]68
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame^]69extern struct perf_event **
70register_wide_hw_breakpoint(unsigned long addr,
71 int len,
72 int type,
73 perf_callback_t triggered,
74 bool active);
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]75
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame^]76extern int register_perf_hw_breakpoint(struct perf_event *bp);
77extern int __register_perf_hw_breakpoint(struct perf_event *bp);
78extern void unregister_hw_breakpoint(struct perf_event *bp);
79extern void unregister_wide_hw_breakpoint(struct perf_event **cpu_events);
80
81extern int reserve_bp_slot(struct perf_event *bp);
82extern void release_bp_slot(struct perf_event *bp);
83
84extern void flush_ptrace_hw_breakpoint(struct task_struct *tsk);
85
86#else /* !CONFIG_HAVE_HW_BREAKPOINT */
87
88static inline struct perf_event *
89register_user_hw_breakpoint(unsigned long addr,
90 int len,
91 int type,
92 perf_callback_t triggered,
93 struct task_struct *tsk,
94 bool active) { return NULL; }
95static inline struct perf_event *
96modify_user_hw_breakpoint(struct perf_event *bp,
97 unsigned long addr,
98 int len,
99 int type,
100 perf_callback_t triggered,
101 struct task_struct *tsk,
102 bool active) { return NULL; }
103static inline struct perf_event *
104register_wide_hw_breakpoint_cpu(unsigned long addr,
105 int len,
106 int type,
107 perf_callback_t triggered,
108 int cpu,
109 bool active) { return NULL; }
110static inline struct perf_event **
111register_wide_hw_breakpoint(unsigned long addr,
112 int len,
113 int type,
114 perf_callback_t triggered,
115 bool active) { return NULL; }
116static inline int
117register_perf_hw_breakpoint(struct perf_event *bp) { return -ENOSYS; }
118static inline int
119__register_perf_hw_breakpoint(struct perf_event *bp) { return -ENOSYS; }
120static inline void unregister_hw_breakpoint(struct perf_event *bp) { }
121static inline void
122unregister_wide_hw_breakpoint(struct perf_event **cpu_events) { }
123static inline int
124reserve_bp_slot(struct perf_event *bp) {return -ENOSYS; }
125static inline void release_bp_slot(struct perf_event *bp) { }
126
127static inline void flush_ptrace_hw_breakpoint(struct task_struct *tsk) { }
128
129#endif /* CONFIG_HAVE_HW_BREAKPOINT */
130
131#endif /* _LINUX_HW_BREAKPOINT_H */