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