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