1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef _I386_HW_BREAKPOINT_H |
3 | #define _I386_HW_BREAKPOINT_H |
4 | |
5 | #include <uapi/asm/hw_breakpoint.h> |
6 | |
7 | #define __ARCH_HW_BREAKPOINT_H |
8 | |
9 | /* |
10 | * The name should probably be something dealt in |
11 | * a higher level. While dealing with the user |
12 | * (display/resolving) |
13 | */ |
14 | struct arch_hw_breakpoint { |
15 | unsigned long address; |
16 | unsigned long mask; |
17 | u8 len; |
18 | u8 type; |
19 | }; |
20 | |
21 | #include <linux/kdebug.h> |
22 | #include <linux/percpu.h> |
23 | #include <linux/list.h> |
24 | |
25 | /* Available HW breakpoint length encodings */ |
26 | #define X86_BREAKPOINT_LEN_X 0x40 |
27 | #define X86_BREAKPOINT_LEN_1 0x40 |
28 | #define X86_BREAKPOINT_LEN_2 0x44 |
29 | #define X86_BREAKPOINT_LEN_4 0x4c |
30 | |
31 | #ifdef CONFIG_X86_64 |
32 | #define X86_BREAKPOINT_LEN_8 0x48 |
33 | #endif |
34 | |
35 | /* Available HW breakpoint type encodings */ |
36 | |
37 | /* trigger on instruction execute */ |
38 | #define X86_BREAKPOINT_EXECUTE 0x80 |
39 | /* trigger on memory write */ |
40 | #define X86_BREAKPOINT_WRITE 0x81 |
41 | /* trigger on memory read or write */ |
42 | #define X86_BREAKPOINT_RW 0x83 |
43 | |
44 | /* Total number of available HW breakpoint registers */ |
45 | #define HBP_NUM 4 |
46 | |
47 | static inline int hw_breakpoint_slots(int type) |
48 | { |
49 | return HBP_NUM; |
50 | } |
51 | |
52 | struct perf_event_attr; |
53 | struct perf_event; |
54 | struct pmu; |
55 | |
56 | extern int arch_check_bp_in_kernelspace(struct arch_hw_breakpoint *hw); |
57 | extern int hw_breakpoint_arch_parse(struct perf_event *bp, |
58 | const struct perf_event_attr *attr, |
59 | struct arch_hw_breakpoint *hw); |
60 | extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused, |
61 | unsigned long val, void *data); |
62 | |
63 | |
64 | int arch_install_hw_breakpoint(struct perf_event *bp); |
65 | void arch_uninstall_hw_breakpoint(struct perf_event *bp); |
66 | void hw_breakpoint_pmu_read(struct perf_event *bp); |
67 | void hw_breakpoint_pmu_unthrottle(struct perf_event *bp); |
68 | |
69 | extern void |
70 | arch_fill_perf_breakpoint(struct perf_event *bp); |
71 | |
72 | unsigned long encode_dr7(int drnum, unsigned int len, unsigned int type); |
73 | int decode_dr7(unsigned long dr7, int bpnum, unsigned *len, unsigned *type); |
74 | |
75 | extern int arch_bp_generic_fields(int x86_len, int x86_type, |
76 | int *gen_len, int *gen_type); |
77 | |
78 | extern struct pmu perf_ops_bp; |
79 | |
80 | #endif /* _I386_HW_BREAKPOINT_H */ |
81 | |