projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| b332828c P |
2 | #ifndef _I386_HW_BREAKPOINT_H |
| 3 | #define _I386_HW_BREAKPOINT_H | |
| 4 | ||
| af170c50 DH |
5 | #include <uapi/asm/hw_breakpoint.h> |
| 6 | ||
| b332828c P |
7 | #define __ARCH_HW_BREAKPOINT_H |
| 8 | ||
| 24f1e32c FW |
9 | /* |
| 10 | * The name should probably be something dealt in | |
| 11 | * a higher level. While dealing with the user | |
| 12 | * (display/resolving) | |
| 13 | */ | |
| b332828c | 14 | struct arch_hw_breakpoint { |
| b332828c | 15 | unsigned long address; |
| d6d55f0b | 16 | unsigned long mask; |
| b332828c P |
17 | u8 len; |
| 18 | u8 type; | |
| 19 | }; | |
| 20 | ||
| 21 | #include <linux/kdebug.h> | |
| 24f1e32c FW |
22 | #include <linux/percpu.h> |
| 23 | #include <linux/list.h> | |
| b332828c P |
24 | |
| 25 | /* Available HW breakpoint length encodings */ | |
| 89e45aac | 26 | #define X86_BREAKPOINT_LEN_X 0x40 |
| 24f1e32c FW |
27 | #define X86_BREAKPOINT_LEN_1 0x40 |
| 28 | #define X86_BREAKPOINT_LEN_2 0x44 | |
| 29 | #define X86_BREAKPOINT_LEN_4 0x4c | |
| b332828c P |
30 | |
| 31 | #ifdef CONFIG_X86_64 | |
| 24f1e32c | 32 | #define X86_BREAKPOINT_LEN_8 0x48 |
| b332828c P |
33 | #endif |
| 34 | ||
| 35 | /* Available HW breakpoint type encodings */ | |
| 36 | ||
| 37 | /* trigger on instruction execute */ | |
| 24f1e32c | 38 | #define X86_BREAKPOINT_EXECUTE 0x80 |
| b332828c | 39 | /* trigger on memory write */ |
| 24f1e32c | 40 | #define X86_BREAKPOINT_WRITE 0x81 |
| b332828c | 41 | /* trigger on memory read or write */ |
| 24f1e32c | 42 | #define X86_BREAKPOINT_RW 0x83 |
| b332828c P |
43 | |
| 44 | /* Total number of available HW breakpoint registers */ | |
| 45 | #define HBP_NUM 4 | |
| 46 | ||
| feef47d0 FW |
47 | static inline int hw_breakpoint_slots(int type) |
| 48 | { | |
| 49 | return HBP_NUM; | |
| 50 | } | |
| 51 | ||
| 24f1e32c FW |
52 | struct perf_event; |
| 53 | struct pmu; | |
| b332828c | 54 | |
| b2812d03 FW |
55 | extern int arch_check_bp_in_kernelspace(struct perf_event *bp); |
| 56 | extern int arch_validate_hwbkpt_settings(struct perf_event *bp); | |
| b332828c | 57 | extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused, |
| 24f1e32c FW |
58 | unsigned long val, void *data); |
| 59 | ||
| 60 | ||
| 61 | int arch_install_hw_breakpoint(struct perf_event *bp); | |
| 62 | void arch_uninstall_hw_breakpoint(struct perf_event *bp); | |
| 63 | void hw_breakpoint_pmu_read(struct perf_event *bp); | |
| 64 | void hw_breakpoint_pmu_unthrottle(struct perf_event *bp); | |
| 65 | ||
| 66 | extern void | |
| 67 | arch_fill_perf_breakpoint(struct perf_event *bp); | |
| 68 | ||
| 69 | unsigned long encode_dr7(int drnum, unsigned int len, unsigned int type); | |
| 70 | int decode_dr7(unsigned long dr7, int bpnum, unsigned *len, unsigned *type); | |
| 71 | ||
| 72 | extern int arch_bp_generic_fields(int x86_len, int x86_type, | |
| 73 | int *gen_len, int *gen_type); | |
| 74 | ||
| 75 | extern struct pmu perf_ops_bp; | |
| 76 | ||
| b332828c | 77 | #endif /* _I386_HW_BREAKPOINT_H */ |