[mirror_ubuntu-bionic-kernel.git] / include / linux / hw_breakpoint.h

#ifndef _LINUX_HW_BREAKPOINT_H
#define _LINUX_HW_BREAKPOINT_H

enum {
	HW_BREAKPOINT_LEN_1 = 1,
	HW_BREAKPOINT_LEN_2 = 2,
	HW_BREAKPOINT_LEN_4 = 4,
	HW_BREAKPOINT_LEN_8 = 8,
};

enum {
	HW_BREAKPOINT_R = 1,
	HW_BREAKPOINT_W = 2,
	HW_BREAKPOINT_X = 4,
};

#ifdef __KERNEL__

#include <linux/perf_event.h>

#ifdef CONFIG_HAVE_HW_BREAKPOINT

static inline unsigned long hw_breakpoint_addr(struct perf_event *bp)
{
	return bp->attr.bp_addr;
}

static inline int hw_breakpoint_type(struct perf_event *bp)
{
	return bp->attr.bp_type;
}

static inline int hw_breakpoint_len(struct perf_event *bp)
{
	return bp->attr.bp_len;
}

extern struct perf_event *
register_user_hw_breakpoint(unsigned long addr,
			    int len,
			    int type,
			    perf_callback_t triggered,
			    struct task_struct *tsk,
			    bool active);

/* FIXME: only change from the attr, and don't unregister */
extern struct perf_event *
modify_user_hw_breakpoint(struct perf_event *bp,
			  unsigned long addr,
			  int len,
			  int type,
			  perf_callback_t triggered,
			  struct task_struct *tsk,
			  bool active);

/*
 * Kernel breakpoints are not associated with any particular thread.
 */
extern struct perf_event *
register_wide_hw_breakpoint_cpu(unsigned long addr,
				int len,
				int type,
				perf_callback_t triggered,
				int cpu,
				bool active);

extern struct perf_event **
register_wide_hw_breakpoint(unsigned long addr,
			    int len,
			    int type,
			    perf_callback_t triggered,
			    bool active);

extern int register_perf_hw_breakpoint(struct perf_event *bp);
extern int __register_perf_hw_breakpoint(struct perf_event *bp);
extern void unregister_hw_breakpoint(struct perf_event *bp);
extern void unregister_wide_hw_breakpoint(struct perf_event **cpu_events);

extern int reserve_bp_slot(struct perf_event *bp);
extern void release_bp_slot(struct perf_event *bp);

extern void flush_ptrace_hw_breakpoint(struct task_struct *tsk);

static inline struct arch_hw_breakpoint *counter_arch_bp(struct perf_event *bp)
{
	return &bp->hw.info;
}

#else /* !CONFIG_HAVE_HW_BREAKPOINT */

static inline struct perf_event *
register_user_hw_breakpoint(unsigned long addr,
			    int len,
			    int type,
			    perf_callback_t triggered,
			    struct task_struct *tsk,
			    bool active)		{ return NULL; }
static inline struct perf_event *
modify_user_hw_breakpoint(struct perf_event *bp,
			  unsigned long addr,
			  int len,
			  int type,
			  perf_callback_t triggered,
			  struct task_struct *tsk,
			  bool active)			{ return NULL; }
static inline struct perf_event *
register_wide_hw_breakpoint_cpu(unsigned long addr,
				int len,
				int type,
				perf_callback_t triggered,
				int cpu,
				bool active)		{ return NULL; }
static inline struct perf_event **
register_wide_hw_breakpoint(unsigned long addr,
			    int len,
			    int type,
			    perf_callback_t triggered,
			    bool active)		{ return NULL; }
static inline int
register_perf_hw_breakpoint(struct perf_event *bp)	{ return -ENOSYS; }
static inline int
__register_perf_hw_breakpoint(struct perf_event *bp) 	{ return -ENOSYS; }
static inline void unregister_hw_breakpoint(struct perf_event *bp)	{ }
static inline void
unregister_wide_hw_breakpoint(struct perf_event **cpu_events)		{ }
static inline int
reserve_bp_slot(struct perf_event *bp)			{return -ENOSYS; }
static inline void release_bp_slot(struct perf_event *bp) 		{ }

static inline void flush_ptrace_hw_breakpoint(struct task_struct *tsk)	{ }

static inline struct arch_hw_breakpoint *counter_arch_bp(struct perf_event *bp)
{
	return NULL;
}

#endif /* CONFIG_HAVE_HW_BREAKPOINT */
#endif /* __KERNEL__ */

#endif /* _LINUX_HW_BREAKPOINT_H */
Commit	Line	Data
2da3e160 FW	1	#ifndef _LINUX_HW_BREAKPOINT_H
2da3e160 FW	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	};
b332828c P	10
24f1e32c FW	11	enum {
	12	HW_BREAKPOINT_R = 1,
	13	HW_BREAKPOINT_W = 2,
	14	HW_BREAKPOINT_X = 4,
	15	};
	16
5093ebad	17	#ifdef __KERNEL__
688bcaff	18
e6db4876 FW	19	#include <linux/perf_event.h>
e6db4876 FW	20
fa7c27ee FW	21	#ifdef CONFIG_HAVE_HW_BREAKPOINT
fa7c27ee FW	22
24f1e32c FW	23	static inline unsigned long hw_breakpoint_addr(struct perf_event *bp)
	24	{
	25	return bp->attr.bp_addr;
	26	}
	27
	28	static inline int hw_breakpoint_type(struct perf_event *bp)
	29	{
	30	return bp->attr.bp_type;
	31	}
	32
	33	static inline int hw_breakpoint_len(struct perf_event *bp)
	34	{
	35	return bp->attr.bp_len;
	36	}
	37
24f1e32c FW	38	extern struct perf_event *
	39	register_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 */
	47	extern struct perf_event *
	48	modify_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);
b332828c	55
b332828c P	56	/*
	57	* Kernel breakpoints are not associated with any particular thread.
	58	*/
24f1e32c FW	59	extern struct perf_event *
	60	register_wide_hw_breakpoint_cpu(unsigned long addr,
	61	int len,
	62	int type,
	63	perf_callback_t triggered,
	64	int cpu,
	65	bool active);
	66
	67	extern struct perf_event **
	68	register_wide_hw_breakpoint(unsigned long addr,
	69	int len,
	70	int type,
	71	perf_callback_t triggered,
	72	bool active);
	73
	74	extern int register_perf_hw_breakpoint(struct perf_event *bp);
	75	extern int __register_perf_hw_breakpoint(struct perf_event *bp);
	76	extern void unregister_hw_breakpoint(struct perf_event *bp);
	77	extern void unregister_wide_hw_breakpoint(struct perf_event **cpu_events);
	78
	79	extern int reserve_bp_slot(struct perf_event *bp);
	80	extern void release_bp_slot(struct perf_event *bp);
	81
	82	extern void flush_ptrace_hw_breakpoint(struct task_struct *tsk);
	83
687b16fb FW	84	static inline struct arch_hw_breakpoint counter_arch_bp(struct perf_event bp)
	85	{
	86	return &bp->hw.info;
	87	}
	88
24f1e32c FW	89	#else /* !CONFIG_HAVE_HW_BREAKPOINT */
	90
	91	static inline struct perf_event *
	92	register_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; }
	98	static inline struct perf_event *
	99	modify_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; }
	106	static inline struct perf_event *
	107	register_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; }
	113	static inline struct perf_event **
	114	register_wide_hw_breakpoint(unsigned long addr,
	115	int len,
	116	int type,
	117	perf_callback_t triggered,
	118	bool active) { return NULL; }
	119	static inline int
	120	register_perf_hw_breakpoint(struct perf_event *bp) { return -ENOSYS; }
	121	static inline int
	122	__register_perf_hw_breakpoint(struct perf_event *bp) { return -ENOSYS; }
	123	static inline void unregister_hw_breakpoint(struct perf_event *bp) { }
	124	static inline void
	125	unregister_wide_hw_breakpoint(struct perf_event **cpu_events) { }
	126	static inline int
	127	reserve_bp_slot(struct perf_event *bp) {return -ENOSYS; }
	128	static inline void release_bp_slot(struct perf_event *bp) { }
	129
	130	static inline void flush_ptrace_hw_breakpoint(struct task_struct *tsk) { }
b332828c	131
687b16fb FW	132	static inline struct arch_hw_breakpoint counter_arch_bp(struct perf_event bp)
	133	{
	134	return NULL;
	135	}
	136
24f1e32c	137	#endif /* CONFIG_HAVE_HW_BREAKPOINT */
5093ebad	138	#endif /* __KERNEL__ */
b332828c	139
24f1e32c	140	#endif /* _LINUX_HW_BREAKPOINT_H */