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