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gerrit-public.fairphone.software / kernel / msm-5.4 / 72f5e08dbba2d01aa90b592cf76c378ea233b00b / . / arch / x86 / include / asm / hw_breakpoint.h
blob: f59c39835a5a93c8d12e48f335459268b229e4af [file] [log] [blame]
Greg Kroah-Hartmanb2441312017-11-01 15:07:57 +0100[diff] [blame]1/* SPDX-License-Identifier: GPL-2.0 */
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]2#ifndef _I386_HW_BREAKPOINT_H
3#define _I386_HW_BREAKPOINT_H
4
David Howellsaf170c52012-12-14 22:37:13 +0000[diff] [blame]5#include <uapi/asm/hw_breakpoint.h>
6
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]7#define __ARCH_HW_BREAKPOINT_H
8
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]9/*
10 * The name should probably be something dealt in
11 * a higher level. While dealing with the user
12 * (display/resolving)
13 */
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]14struct arch_hw_breakpoint {
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]15 unsigned long address;
Jacob Shind6d55f02014-05-29 17:26:50 +0200[diff] [blame]16 unsigned long mask;
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]17 u8 len;
18 u8 type;
19};
20
21#include <linux/kdebug.h>
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]22#include <linux/percpu.h>
23#include <linux/list.h>
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]24
25/* Available HW breakpoint length encodings */
Frederic Weisbecker89e45aa2010-09-17 03:24:13 +0200[diff] [blame]26#define X86_BREAKPOINT_LEN_X 0x40
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]27#define X86_BREAKPOINT_LEN_1 0x40
28#define X86_BREAKPOINT_LEN_2 0x44
29#define X86_BREAKPOINT_LEN_4 0x4c
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]30
31#ifdef CONFIG_X86_64
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]32#define X86_BREAKPOINT_LEN_8 0x48
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]33#endif
34
35/* Available HW breakpoint type encodings */
36
37/* trigger on instruction execute */
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]38#define X86_BREAKPOINT_EXECUTE 0x80
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]39/* trigger on memory write */
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]40#define X86_BREAKPOINT_WRITE 0x81
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]41/* trigger on memory read or write */
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]42#define X86_BREAKPOINT_RW 0x83
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]43
44/* Total number of available HW breakpoint registers */
45#define HBP_NUM 4
46
Frederic Weisbeckerfeef47d2010-04-23 05:59:55 +0200[diff] [blame]47static inline int hw_breakpoint_slots(int type)
48{
49 return HBP_NUM;
50}
51
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]52struct perf_event;
53struct pmu;
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]54
Frederic Weisbeckerb2812d02010-04-18 18:11:53 +0200[diff] [blame]55extern int arch_check_bp_in_kernelspace(struct perf_event *bp);
56extern int arch_validate_hwbkpt_settings(struct perf_event *bp);
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]57extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused,
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200[diff] [blame]58 unsigned long val, void *data);
59
60
61int arch_install_hw_breakpoint(struct perf_event *bp);
62void arch_uninstall_hw_breakpoint(struct perf_event *bp);
63void hw_breakpoint_pmu_read(struct perf_event *bp);
64void hw_breakpoint_pmu_unthrottle(struct perf_event *bp);
65
66extern void
67arch_fill_perf_breakpoint(struct perf_event *bp);
68
69unsigned long encode_dr7(int drnum, unsigned int len, unsigned int type);
70int decode_dr7(unsigned long dr7, int bpnum, unsigned *len, unsigned *type);
71
72extern int arch_bp_generic_fields(int x86_len, int x86_type,
73 int *gen_len, int *gen_type);
74
75extern struct pmu perf_ops_bp;
76
K.Prasadb332828c2009-06-01 23:43:10 +0530[diff] [blame]77#endif /* _I386_HW_BREAKPOINT_H */