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gerrit-public.fairphone.software / kernel / msm-5.4 / 24f1e32c60c45c89a997c73395b69c8af6f0a84e / . / arch / x86 / include / asm / hw_breakpoint.h
blob: 0675a7c4c20e82e168b88242dca1211ed8f52a62 [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 {
13 char *name; /* Contains name of the symbol to set bkpt */
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 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
27#define X86_BREAKPOINT_LEN_EXECUTE 0x40
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 Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame^]45struct perf_event;
46struct pmu;
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]47
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]48extern int arch_check_va_in_userspace(unsigned long va, u8 hbp_len);
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame^]49extern int arch_validate_hwbkpt_settings(struct perf_event *bp,
50 struct task_struct *tsk);
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]51extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused,
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame^]52 unsigned long val, void *data);
53
54
55int arch_install_hw_breakpoint(struct perf_event *bp);
56void arch_uninstall_hw_breakpoint(struct perf_event *bp);
57void hw_breakpoint_pmu_read(struct perf_event *bp);
58void hw_breakpoint_pmu_unthrottle(struct perf_event *bp);
59
60extern void
61arch_fill_perf_breakpoint(struct perf_event *bp);
62
63unsigned long encode_dr7(int drnum, unsigned int len, unsigned int type);
64int decode_dr7(unsigned long dr7, int bpnum, unsigned *len, unsigned *type);
65
66extern int arch_bp_generic_fields(int x86_len, int x86_type,
67 int *gen_len, int *gen_type);
68
69extern struct pmu perf_ops_bp;
70
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]71#endif /* __KERNEL__ */
72#endif /* _I386_HW_BREAKPOINT_H */
73