Gitiles
Code Review Sign In
gerrit-public.fairphone.software / kernel / msm-5.4 / af170c5061dd78512c469e6e2d211980cdb2c193 / . / arch / x86 / include / asm / hw_breakpoint.h
blob: ef1c4d2d41eceff8cee01b4fdc9c18987c2dbe20 [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;
15 u8 len;
16 u8 type;
17};
18
19#include <linux/kdebug.h>
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]20#include <linux/percpu.h>
21#include <linux/list.h>
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]22
23/* Available HW breakpoint length encodings */
Frederic Weisbecker89e45aa2010-09-17 03:24:13 +0200[diff] [blame]24#define X86_BREAKPOINT_LEN_X 0x40
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]25#define X86_BREAKPOINT_LEN_1 0x40
26#define X86_BREAKPOINT_LEN_2 0x44
27#define X86_BREAKPOINT_LEN_4 0x4c
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]28
29#ifdef CONFIG_X86_64
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]30#define X86_BREAKPOINT_LEN_8 0x48
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]31#endif
32
33/* Available HW breakpoint type encodings */
34
35/* trigger on instruction execute */
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]36#define X86_BREAKPOINT_EXECUTE 0x80
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]37/* trigger on memory write */
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]38#define X86_BREAKPOINT_WRITE 0x81
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]39/* trigger on memory read or write */
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]40#define X86_BREAKPOINT_RW 0x83
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]41
42/* Total number of available HW breakpoint registers */
43#define HBP_NUM 4
44
Frederic Weisbeckerfeef47d2010-04-23 05:59:55 +0200[diff] [blame]45static inline int hw_breakpoint_slots(int type)
46{
47 return HBP_NUM;
48}
49
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]50struct perf_event;
51struct pmu;
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]52
Frederic Weisbeckerb2812d02010-04-18 18:11:53 +0200[diff] [blame]53extern int arch_check_bp_in_kernelspace(struct perf_event *bp);
54extern int arch_validate_hwbkpt_settings(struct perf_event *bp);
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]55extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused,
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]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
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]75#endif /* _I386_HW_BREAKPOINT_H */