Frederic Weisbecker | 2da3e16 | 2009-11-05 23:06:50 +0100 | [diff] [blame] | 1 | #ifndef _LINUX_HW_BREAKPOINT_H |
| 2 | #define _LINUX_HW_BREAKPOINT_H |
K.Prasad | b332828c | 2009-06-01 23:43:10 +0530 | [diff] [blame] | 3 | |
Frederic Weisbecker | 24f1e32c | 2009-09-09 19:22:48 +0200 | [diff] [blame] | 4 | #include <linux/perf_event.h> |
K.Prasad | b332828c | 2009-06-01 23:43:10 +0530 | [diff] [blame] | 5 | |
Frederic Weisbecker | 24f1e32c | 2009-09-09 19:22:48 +0200 | [diff] [blame] | 6 | enum { |
| 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.Prasad | b332828c | 2009-06-01 23:43:10 +0530 | [diff] [blame] | 11 | }; |
| 12 | |
Frederic Weisbecker | 24f1e32c | 2009-09-09 19:22:48 +0200 | [diff] [blame] | 13 | enum { |
| 14 | HW_BREAKPOINT_R = 1, |
| 15 | HW_BREAKPOINT_W = 2, |
| 16 | HW_BREAKPOINT_X = 4, |
| 17 | }; |
K.Prasad | b332828c | 2009-06-01 23:43:10 +0530 | [diff] [blame] | 18 | |
Ingo Molnar | 688bcaf | 2009-11-14 01:12:47 +0100 | [diff] [blame^] | 19 | #ifdef CONFIG_HAVE_HW_BREAKPOINT |
| 20 | |
Frederic Weisbecker | 24f1e32c | 2009-09-09 19:22:48 +0200 | [diff] [blame] | 21 | static inline unsigned long hw_breakpoint_addr(struct perf_event *bp) |
| 22 | { |
| 23 | return bp->attr.bp_addr; |
| 24 | } |
| 25 | |
| 26 | static inline int hw_breakpoint_type(struct perf_event *bp) |
| 27 | { |
| 28 | return bp->attr.bp_type; |
| 29 | } |
| 30 | |
| 31 | static inline int hw_breakpoint_len(struct perf_event *bp) |
| 32 | { |
| 33 | return bp->attr.bp_len; |
| 34 | } |
| 35 | |
Frederic Weisbecker | 24f1e32c | 2009-09-09 19:22:48 +0200 | [diff] [blame] | 36 | extern struct perf_event * |
| 37 | register_user_hw_breakpoint(unsigned long addr, |
| 38 | int len, |
| 39 | int type, |
| 40 | perf_callback_t triggered, |
| 41 | struct task_struct *tsk, |
| 42 | bool active); |
| 43 | |
| 44 | /* FIXME: only change from the attr, and don't unregister */ |
| 45 | extern struct perf_event * |
| 46 | modify_user_hw_breakpoint(struct perf_event *bp, |
| 47 | unsigned long addr, |
| 48 | int len, |
| 49 | int type, |
| 50 | perf_callback_t triggered, |
| 51 | struct task_struct *tsk, |
| 52 | bool active); |
| 53 | |
K.Prasad | b332828c | 2009-06-01 23:43:10 +0530 | [diff] [blame] | 54 | /* |
| 55 | * Kernel breakpoints are not associated with any particular thread. |
| 56 | */ |
Frederic Weisbecker | 24f1e32c | 2009-09-09 19:22:48 +0200 | [diff] [blame] | 57 | extern struct perf_event * |
| 58 | register_wide_hw_breakpoint_cpu(unsigned long addr, |
| 59 | int len, |
| 60 | int type, |
| 61 | perf_callback_t triggered, |
| 62 | int cpu, |
| 63 | bool active); |
K.Prasad | b332828c | 2009-06-01 23:43:10 +0530 | [diff] [blame] | 64 | |
Frederic Weisbecker | 24f1e32c | 2009-09-09 19:22:48 +0200 | [diff] [blame] | 65 | extern struct perf_event ** |
| 66 | register_wide_hw_breakpoint(unsigned long addr, |
| 67 | int len, |
| 68 | int type, |
| 69 | perf_callback_t triggered, |
| 70 | bool active); |
K.Prasad | b332828c | 2009-06-01 23:43:10 +0530 | [diff] [blame] | 71 | |
Frederic Weisbecker | 24f1e32c | 2009-09-09 19:22:48 +0200 | [diff] [blame] | 72 | extern int register_perf_hw_breakpoint(struct perf_event *bp); |
| 73 | extern int __register_perf_hw_breakpoint(struct perf_event *bp); |
| 74 | extern void unregister_hw_breakpoint(struct perf_event *bp); |
| 75 | extern void unregister_wide_hw_breakpoint(struct perf_event **cpu_events); |
| 76 | |
| 77 | extern int reserve_bp_slot(struct perf_event *bp); |
| 78 | extern void release_bp_slot(struct perf_event *bp); |
| 79 | |
| 80 | extern void flush_ptrace_hw_breakpoint(struct task_struct *tsk); |
| 81 | |
Frederic Weisbecker | 687b16f | 2009-11-13 13:16:15 +0100 | [diff] [blame] | 82 | static inline struct arch_hw_breakpoint *counter_arch_bp(struct perf_event *bp) |
| 83 | { |
| 84 | return &bp->hw.info; |
| 85 | } |
| 86 | |
Frederic Weisbecker | 24f1e32c | 2009-09-09 19:22:48 +0200 | [diff] [blame] | 87 | #else /* !CONFIG_HAVE_HW_BREAKPOINT */ |
| 88 | |
| 89 | static inline struct perf_event * |
| 90 | register_user_hw_breakpoint(unsigned long addr, |
| 91 | int len, |
| 92 | int type, |
| 93 | perf_callback_t triggered, |
| 94 | struct task_struct *tsk, |
| 95 | bool active) { return NULL; } |
| 96 | static inline struct perf_event * |
| 97 | modify_user_hw_breakpoint(struct perf_event *bp, |
| 98 | unsigned long addr, |
| 99 | int len, |
| 100 | int type, |
| 101 | perf_callback_t triggered, |
| 102 | struct task_struct *tsk, |
| 103 | bool active) { return NULL; } |
| 104 | static inline struct perf_event * |
| 105 | register_wide_hw_breakpoint_cpu(unsigned long addr, |
| 106 | int len, |
| 107 | int type, |
| 108 | perf_callback_t triggered, |
| 109 | int cpu, |
| 110 | bool active) { return NULL; } |
| 111 | static inline struct perf_event ** |
| 112 | register_wide_hw_breakpoint(unsigned long addr, |
| 113 | int len, |
| 114 | int type, |
| 115 | perf_callback_t triggered, |
| 116 | bool active) { return NULL; } |
| 117 | static inline int |
| 118 | register_perf_hw_breakpoint(struct perf_event *bp) { return -ENOSYS; } |
| 119 | static inline int |
| 120 | __register_perf_hw_breakpoint(struct perf_event *bp) { return -ENOSYS; } |
| 121 | static inline void unregister_hw_breakpoint(struct perf_event *bp) { } |
| 122 | static inline void |
| 123 | unregister_wide_hw_breakpoint(struct perf_event **cpu_events) { } |
| 124 | static inline int |
| 125 | reserve_bp_slot(struct perf_event *bp) {return -ENOSYS; } |
| 126 | static inline void release_bp_slot(struct perf_event *bp) { } |
| 127 | |
| 128 | static inline void flush_ptrace_hw_breakpoint(struct task_struct *tsk) { } |
| 129 | |
Frederic Weisbecker | 687b16f | 2009-11-13 13:16:15 +0100 | [diff] [blame] | 130 | static inline struct arch_hw_breakpoint *counter_arch_bp(struct perf_event *bp) |
| 131 | { |
| 132 | return NULL; |
| 133 | } |
| 134 | |
Frederic Weisbecker | 24f1e32c | 2009-09-09 19:22:48 +0200 | [diff] [blame] | 135 | #endif /* CONFIG_HAVE_HW_BREAKPOINT */ |
| 136 | |
| 137 | #endif /* _LINUX_HW_BREAKPOINT_H */ |