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gerrit-public.fairphone.software / kernel / msm-4.9 / 26a67ec47a4c58fe79c6421c3dc3d697d322d2d6 / . / arch / x86 / include / asm / hw_breakpoint.h
blob: 6c98be864a75afcbce9530a8ea538a54816bdae8 [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
David Howellsaf170c52012-12-14 22:37:13 +0000[diff] [blame]4#include <uapi/asm/hw_breakpoint.h>
5
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]6#define __ARCH_HW_BREAKPOINT_H
7
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]8/*
9 * The name should probably be something dealt in
10 * a higher level. While dealing with the user
11 * (display/resolving)
12 */
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]13struct arch_hw_breakpoint {
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]14 unsigned long address;
Jacob Shind6d55f02014-05-29 17:26:50 +0200[diff] [blame]15 unsigned long mask;
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]16 u8 len;
17 u8 type;
18};
19
20#include <linux/kdebug.h>
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]21#include <linux/percpu.h>
22#include <linux/list.h>
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]23
24/* Available HW breakpoint length encodings */
Frederic Weisbecker89e45aa2010-09-17 03:24:13 +0200[diff] [blame]25#define X86_BREAKPOINT_LEN_X 0x40
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]26#define X86_BREAKPOINT_LEN_1 0x40
27#define X86_BREAKPOINT_LEN_2 0x44
28#define X86_BREAKPOINT_LEN_4 0x4c
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]29
30#ifdef CONFIG_X86_64
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]31#define X86_BREAKPOINT_LEN_8 0x48
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]32#endif
33
34/* Available HW breakpoint type encodings */
35
36/* trigger on instruction execute */
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]37#define X86_BREAKPOINT_EXECUTE 0x80
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]38/* trigger on memory write */
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]39#define X86_BREAKPOINT_WRITE 0x81
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]40/* trigger on memory read or write */
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]41#define X86_BREAKPOINT_RW 0x83
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]42
43/* Total number of available HW breakpoint registers */
44#define HBP_NUM 4
45
Frederic Weisbeckerfeef47d2010-04-23 05:59:55 +0200[diff] [blame]46static inline int hw_breakpoint_slots(int type)
47{
48 return HBP_NUM;
49}
50
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]51struct perf_event;
52struct pmu;
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]53
Frederic Weisbeckerb2812d02010-04-18 18:11:53 +0200[diff] [blame]54extern int arch_check_bp_in_kernelspace(struct perf_event *bp);
55extern int arch_validate_hwbkpt_settings(struct perf_event *bp);
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]56extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused,
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]57 unsigned long val, void *data);
58
59
60int arch_install_hw_breakpoint(struct perf_event *bp);
61void arch_uninstall_hw_breakpoint(struct perf_event *bp);
62void hw_breakpoint_pmu_read(struct perf_event *bp);
63void hw_breakpoint_pmu_unthrottle(struct perf_event *bp);
64
65extern void
66arch_fill_perf_breakpoint(struct perf_event *bp);
67
68unsigned long encode_dr7(int drnum, unsigned int len, unsigned int type);
69int decode_dr7(unsigned long dr7, int bpnum, unsigned *len, unsigned *type);
70
71extern int arch_bp_generic_fields(int x86_len, int x86_type,
72 int *gen_len, int *gen_type);
73
74extern struct pmu perf_ops_bp;
75
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]76#endif /* _I386_HW_BREAKPOINT_H */