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gerrit-public.fairphone.software / kernel / msm-4.9 / 36731410834e08c7d15c3980abd6cc4c563c2e87 / . / arch / x86 / include / asm / hw_breakpoint.h
blob: 824ca07860d012cdcc9c46886500d056fdb2aeed [file] [log] [blame]
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]1#ifndef _I386_HW_BREAKPOINT_H
2#define _I386_HW_BREAKPOINT_H
3
4#ifdef __KERNEL__
5#define __ARCH_HW_BREAKPOINT_H
6
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]7/*
8 * The name should probably be something dealt in
9 * a higher level. While dealing with the user
10 * (display/resolving)
11 */
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]12struct arch_hw_breakpoint {
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]13 unsigned long address;
14 u8 len;
15 u8 type;
16};
17
18#include <linux/kdebug.h>
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]19#include <linux/percpu.h>
20#include <linux/list.h>
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]21
22/* Available HW breakpoint length encodings */
Frederic Weisbecker89e45aa2010-09-17 03:24:13 +0200[diff] [blame]23#define X86_BREAKPOINT_LEN_X 0x40
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]24#define X86_BREAKPOINT_LEN_1 0x40
25#define X86_BREAKPOINT_LEN_2 0x44
26#define X86_BREAKPOINT_LEN_4 0x4c
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]27
28#ifdef CONFIG_X86_64
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]29#define X86_BREAKPOINT_LEN_8 0x48
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]30#endif
31
32/* Available HW breakpoint type encodings */
33
34/* trigger on instruction execute */
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]35#define X86_BREAKPOINT_EXECUTE 0x80
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]36/* trigger on memory write */
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]37#define X86_BREAKPOINT_WRITE 0x81
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]38/* trigger on memory read or write */
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]39#define X86_BREAKPOINT_RW 0x83
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]40
41/* Total number of available HW breakpoint registers */
42#define HBP_NUM 4
43
Frederic Weisbeckerfeef47d2010-04-23 05:59:55 +0200[diff] [blame]44static inline int hw_breakpoint_slots(int type)
45{
46 return HBP_NUM;
47}
48
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]49struct perf_event;
50struct pmu;
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]51
Frederic Weisbeckerb2812d02010-04-18 18:11:53 +0200[diff] [blame]52extern int arch_check_bp_in_kernelspace(struct perf_event *bp);
53extern int arch_validate_hwbkpt_settings(struct perf_event *bp);
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]54extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused,
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]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
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]74#endif /* __KERNEL__ */
75#endif /* _I386_HW_BREAKPOINT_H */
76