Gitiles
Code Review Sign In
gerrit-public.fairphone.software / kernel / msm-5.4 / 687b16fb617bd446439425a368ad7c7bbd202c73 / . / include / linux / hw_breakpoint.h
blob: 18710e0c84bd5680a49b8c7470a820481e2bc409 [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 unsigned long hw_breakpoint_addr(struct perf_event *bp)
20{
21 return bp->attr.bp_addr;
22}
23
24static inline int hw_breakpoint_type(struct perf_event *bp)
25{
26 return bp->attr.bp_type;
27}
28
29static inline int hw_breakpoint_len(struct perf_event *bp)
30{
31 return bp->attr.bp_len;
32}
33
34#ifdef CONFIG_HAVE_HW_BREAKPOINT
35extern struct perf_event *
36register_user_hw_breakpoint(unsigned long addr,
37 int len,
38 int type,
39 perf_callback_t triggered,
40 struct task_struct *tsk,
41 bool active);
42
43/* FIXME: only change from the attr, and don't unregister */
44extern struct perf_event *
45modify_user_hw_breakpoint(struct perf_event *bp,
46 unsigned long addr,
47 int len,
48 int type,
49 perf_callback_t triggered,
50 struct task_struct *tsk,
51 bool active);
52
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]53/*
54 * Kernel breakpoints are not associated with any particular thread.
55 */
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]56extern struct perf_event *
57register_wide_hw_breakpoint_cpu(unsigned long addr,
58 int len,
59 int type,
60 perf_callback_t triggered,
61 int cpu,
62 bool active);
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]63
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]64extern struct perf_event **
65register_wide_hw_breakpoint(unsigned long addr,
66 int len,
67 int type,
68 perf_callback_t triggered,
69 bool active);
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]70
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]71extern int register_perf_hw_breakpoint(struct perf_event *bp);
72extern int __register_perf_hw_breakpoint(struct perf_event *bp);
73extern void unregister_hw_breakpoint(struct perf_event *bp);
74extern void unregister_wide_hw_breakpoint(struct perf_event **cpu_events);
75
76extern int reserve_bp_slot(struct perf_event *bp);
77extern void release_bp_slot(struct perf_event *bp);
78
79extern void flush_ptrace_hw_breakpoint(struct task_struct *tsk);
80
Frederic Weisbecker687b16f2009-11-13 13:16:15 +0100[diff] [blame^]81static inline struct arch_hw_breakpoint *counter_arch_bp(struct perf_event *bp)
82{
83 return &bp->hw.info;
84}
85
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]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
Frederic Weisbecker687b16f2009-11-13 13:16:15 +0100[diff] [blame^]129static inline struct arch_hw_breakpoint *counter_arch_bp(struct perf_event *bp)
130{
131 return NULL;
132}
133
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]134#endif /* CONFIG_HAVE_HW_BREAKPOINT */
135
136#endif /* _LINUX_HW_BREAKPOINT_H */