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/arch/x86/include/asm/hw_breakpoint.h

https://bitbucket.org/ndreys/linux-sunxi
C++ Header | 76 lines | 46 code | 19 blank | 11 comment | 0 complexity | 7de2d813c8d384c7af5f1efb88b125ff MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.0, AGPL-1.0
 1#ifndef	_I386_HW_BREAKPOINT_H
 2#define	_I386_HW_BREAKPOINT_H
 3
 4#ifdef	__KERNEL__
 5#define	__ARCH_HW_BREAKPOINT_H
 6
 7/*
 8 * The name should probably be something dealt in
 9 * a higher level. While dealing with the user
10 * (display/resolving)
11 */
12struct arch_hw_breakpoint {
13	unsigned long	address;
14	u8		len;
15	u8		type;
16};
17
18#include <linux/kdebug.h>
19#include <linux/percpu.h>
20#include <linux/list.h>
21
22/* Available HW breakpoint length encodings */
23#define X86_BREAKPOINT_LEN_X		0x40
24#define X86_BREAKPOINT_LEN_1		0x40
25#define X86_BREAKPOINT_LEN_2		0x44
26#define X86_BREAKPOINT_LEN_4		0x4c
27
28#ifdef CONFIG_X86_64
29#define X86_BREAKPOINT_LEN_8		0x48
30#endif
31
32/* Available HW breakpoint type encodings */
33
34/* trigger on instruction execute */
35#define X86_BREAKPOINT_EXECUTE	0x80
36/* trigger on memory write */
37#define X86_BREAKPOINT_WRITE	0x81
38/* trigger on memory read or write */
39#define X86_BREAKPOINT_RW	0x83
40
41/* Total number of available HW breakpoint registers */
42#define HBP_NUM 4
43
44static inline int hw_breakpoint_slots(int type)
45{
46	return HBP_NUM;
47}
48
49struct perf_event;
50struct pmu;
51
52extern int arch_check_bp_in_kernelspace(struct perf_event *bp);
53extern int arch_validate_hwbkpt_settings(struct perf_event *bp);
54extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused,
55					   unsigned long val, void *data);
56
57
58int arch_install_hw_breakpoint(struct perf_event *bp);
59void arch_uninstall_hw_breakpoint(struct perf_event *bp);
60void hw_breakpoint_pmu_read(struct perf_event *bp);
61void hw_breakpoint_pmu_unthrottle(struct perf_event *bp);
62
63extern void
64arch_fill_perf_breakpoint(struct perf_event *bp);
65
66unsigned long encode_dr7(int drnum, unsigned int len, unsigned int type);
67int decode_dr7(unsigned long dr7, int bpnum, unsigned *len, unsigned *type);
68
69extern int arch_bp_generic_fields(int x86_len, int x86_type,
70				  int *gen_len, int *gen_type);
71
72extern struct pmu perf_ops_bp;
73
74#endif	/* __KERNEL__ */
75#endif	/* _I386_HW_BREAKPOINT_H */
76