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gerrit-public.fairphone.software / kernel / msm-4.9 / fa7c27ee9394fc0d52404b2a89882e95868a60b9 / . / include / linux / hw_breakpoint.h
blob: c9f7f7c7b0e0c5ae79831e07c113b0f959b446e1 [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]4enum {
5 HW_BREAKPOINT_LEN_1 = 1,
6 HW_BREAKPOINT_LEN_2 = 2,
7 HW_BREAKPOINT_LEN_4 = 4,
8 HW_BREAKPOINT_LEN_8 = 8,
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]9};
10
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]11enum {
12 HW_BREAKPOINT_R = 1,
13 HW_BREAKPOINT_W = 2,
14 HW_BREAKPOINT_X = 4,
15};
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]16
Frederic Weisbecker5093eba2009-11-22 05:21:35 +0100[diff] [blame]17#ifdef __KERNEL__
Ingo Molnar688bcaf2009-11-14 01:12:47 +0100[diff] [blame]18
Frederic Weisbeckere6db4872009-11-23 15:42:32 +0100[diff] [blame]19#include <linux/perf_event.h>
20
Frederic Weisbeckerfa7c27e2009-11-23 22:30:12 +0100[diff] [blame^]21#ifdef CONFIG_HAVE_HW_BREAKPOINT
22
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]23static inline unsigned long hw_breakpoint_addr(struct perf_event *bp)
24{
25 return bp->attr.bp_addr;
26}
27
28static inline int hw_breakpoint_type(struct perf_event *bp)
29{
30 return bp->attr.bp_type;
31}
32
33static inline int hw_breakpoint_len(struct perf_event *bp)
34{
35 return bp->attr.bp_len;
36}
37
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]38extern struct perf_event *
39register_user_hw_breakpoint(unsigned long addr,
40 int len,
41 int type,
42 perf_callback_t triggered,
43 struct task_struct *tsk,
44 bool active);
45
46/* FIXME: only change from the attr, and don't unregister */
47extern struct perf_event *
48modify_user_hw_breakpoint(struct perf_event *bp,
49 unsigned long addr,
50 int len,
51 int type,
52 perf_callback_t triggered,
53 struct task_struct *tsk,
54 bool active);
55
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]56/*
57 * Kernel breakpoints are not associated with any particular thread.
58 */
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]59extern struct perf_event *
60register_wide_hw_breakpoint_cpu(unsigned long addr,
61 int len,
62 int type,
63 perf_callback_t triggered,
64 int cpu,
65 bool active);
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]66
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]67extern struct perf_event **
68register_wide_hw_breakpoint(unsigned long addr,
69 int len,
70 int type,
71 perf_callback_t triggered,
72 bool active);
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]73
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]74extern int register_perf_hw_breakpoint(struct perf_event *bp);
75extern int __register_perf_hw_breakpoint(struct perf_event *bp);
76extern void unregister_hw_breakpoint(struct perf_event *bp);
77extern void unregister_wide_hw_breakpoint(struct perf_event **cpu_events);
78
79extern int reserve_bp_slot(struct perf_event *bp);
80extern void release_bp_slot(struct perf_event *bp);
81
82extern void flush_ptrace_hw_breakpoint(struct task_struct *tsk);
83
Frederic Weisbecker687b16f2009-11-13 13:16:15 +0100[diff] [blame]84static inline struct arch_hw_breakpoint *counter_arch_bp(struct perf_event *bp)
85{
86 return &bp->hw.info;
87}
88
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]89#else /* !CONFIG_HAVE_HW_BREAKPOINT */
90
91static inline struct perf_event *
92register_user_hw_breakpoint(unsigned long addr,
93 int len,
94 int type,
95 perf_callback_t triggered,
96 struct task_struct *tsk,
97 bool active) { return NULL; }
98static inline struct perf_event *
99modify_user_hw_breakpoint(struct perf_event *bp,
100 unsigned long addr,
101 int len,
102 int type,
103 perf_callback_t triggered,
104 struct task_struct *tsk,
105 bool active) { return NULL; }
106static inline struct perf_event *
107register_wide_hw_breakpoint_cpu(unsigned long addr,
108 int len,
109 int type,
110 perf_callback_t triggered,
111 int cpu,
112 bool active) { return NULL; }
113static inline struct perf_event **
114register_wide_hw_breakpoint(unsigned long addr,
115 int len,
116 int type,
117 perf_callback_t triggered,
118 bool active) { return NULL; }
119static inline int
120register_perf_hw_breakpoint(struct perf_event *bp) { return -ENOSYS; }
121static inline int
122__register_perf_hw_breakpoint(struct perf_event *bp) { return -ENOSYS; }
123static inline void unregister_hw_breakpoint(struct perf_event *bp) { }
124static inline void
125unregister_wide_hw_breakpoint(struct perf_event **cpu_events) { }
126static inline int
127reserve_bp_slot(struct perf_event *bp) {return -ENOSYS; }
128static inline void release_bp_slot(struct perf_event *bp) { }
129
130static inline void flush_ptrace_hw_breakpoint(struct task_struct *tsk) { }
131
Frederic Weisbecker687b16f2009-11-13 13:16:15 +0100[diff] [blame]132static inline struct arch_hw_breakpoint *counter_arch_bp(struct perf_event *bp)
133{
134 return NULL;
135}
136
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]137#endif /* CONFIG_HAVE_HW_BREAKPOINT */
Frederic Weisbecker5093eba2009-11-22 05:21:35 +0100[diff] [blame]138#endif /* __KERNEL__ */
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]139
140#endif /* _LINUX_HW_BREAKPOINT_H */