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 u8 len; 16 u8 type; 17 }; 18 19 #include <linux/kdebug.h> 20 #include <linux/percpu.h> 21 #include <linux/list.h> 22 23 /* Available HW breakpoint length encodings */ 24 #define X86_BREAKPOINT_LEN_X 0x40 25 #define X86_BREAKPOINT_LEN_1 0x40 26 #define X86_BREAKPOINT_LEN_2 0x44 27 #define X86_BREAKPOINT_LEN_4 0x4c 28 29 #ifdef CONFIG_X86_64 30 #define X86_BREAKPOINT_LEN_8 0x48 31 #endif 32 33 /* Available HW breakpoint type encodings */ 34 35 /* trigger on instruction execute */ 36 #define X86_BREAKPOINT_EXECUTE 0x80 37 /* trigger on memory write */ 38 #define X86_BREAKPOINT_WRITE 0x81 39 /* trigger on memory read or write */ 40 #define X86_BREAKPOINT_RW 0x83 41 42 /* Total number of available HW breakpoint registers */ 43 #define HBP_NUM 4 44 45 static inline int hw_breakpoint_slots(int type) 46 { 47 return HBP_NUM; 48 } 49 50 struct perf_event; 51 struct pmu; 52 53 extern int arch_check_bp_in_kernelspace(struct perf_event *bp); 54 extern int arch_validate_hwbkpt_settings(struct perf_event *bp); 55 extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused, 56 unsigned long val, void *data); 57 58 59 int arch_install_hw_breakpoint(struct perf_event *bp); 60 void arch_uninstall_hw_breakpoint(struct perf_event *bp); 61 void hw_breakpoint_pmu_read(struct perf_event *bp); 62 void hw_breakpoint_pmu_unthrottle(struct perf_event *bp); 63 64 extern void 65 arch_fill_perf_breakpoint(struct perf_event *bp); 66 67 unsigned long encode_dr7(int drnum, unsigned int len, unsigned int type); 68 int decode_dr7(unsigned long dr7, int bpnum, unsigned *len, unsigned *type); 69 70 extern int arch_bp_generic_fields(int x86_len, int x86_type, 71 int *gen_len, int *gen_type); 72 73 extern struct pmu perf_ops_bp; 74 75 #endif /* _I386_HW_BREAKPOINT_H */ 76