18c2ecf20Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */ 28c2ecf20Sopenharmony_ci#ifndef _I386_HW_BREAKPOINT_H 38c2ecf20Sopenharmony_ci#define _I386_HW_BREAKPOINT_H 48c2ecf20Sopenharmony_ci 58c2ecf20Sopenharmony_ci#include <uapi/asm/hw_breakpoint.h> 68c2ecf20Sopenharmony_ci 78c2ecf20Sopenharmony_ci#define __ARCH_HW_BREAKPOINT_H 88c2ecf20Sopenharmony_ci 98c2ecf20Sopenharmony_ci/* 108c2ecf20Sopenharmony_ci * The name should probably be something dealt in 118c2ecf20Sopenharmony_ci * a higher level. While dealing with the user 128c2ecf20Sopenharmony_ci * (display/resolving) 138c2ecf20Sopenharmony_ci */ 148c2ecf20Sopenharmony_cistruct arch_hw_breakpoint { 158c2ecf20Sopenharmony_ci unsigned long address; 168c2ecf20Sopenharmony_ci unsigned long mask; 178c2ecf20Sopenharmony_ci u8 len; 188c2ecf20Sopenharmony_ci u8 type; 198c2ecf20Sopenharmony_ci}; 208c2ecf20Sopenharmony_ci 218c2ecf20Sopenharmony_ci#include <linux/kdebug.h> 228c2ecf20Sopenharmony_ci#include <linux/percpu.h> 238c2ecf20Sopenharmony_ci#include <linux/list.h> 248c2ecf20Sopenharmony_ci 258c2ecf20Sopenharmony_ci/* Available HW breakpoint length encodings */ 268c2ecf20Sopenharmony_ci#define X86_BREAKPOINT_LEN_X 0x40 278c2ecf20Sopenharmony_ci#define X86_BREAKPOINT_LEN_1 0x40 288c2ecf20Sopenharmony_ci#define X86_BREAKPOINT_LEN_2 0x44 298c2ecf20Sopenharmony_ci#define X86_BREAKPOINT_LEN_4 0x4c 308c2ecf20Sopenharmony_ci 318c2ecf20Sopenharmony_ci#ifdef CONFIG_X86_64 328c2ecf20Sopenharmony_ci#define X86_BREAKPOINT_LEN_8 0x48 338c2ecf20Sopenharmony_ci#endif 348c2ecf20Sopenharmony_ci 358c2ecf20Sopenharmony_ci/* Available HW breakpoint type encodings */ 368c2ecf20Sopenharmony_ci 378c2ecf20Sopenharmony_ci/* trigger on instruction execute */ 388c2ecf20Sopenharmony_ci#define X86_BREAKPOINT_EXECUTE 0x80 398c2ecf20Sopenharmony_ci/* trigger on memory write */ 408c2ecf20Sopenharmony_ci#define X86_BREAKPOINT_WRITE 0x81 418c2ecf20Sopenharmony_ci/* trigger on memory read or write */ 428c2ecf20Sopenharmony_ci#define X86_BREAKPOINT_RW 0x83 438c2ecf20Sopenharmony_ci 448c2ecf20Sopenharmony_ci/* Total number of available HW breakpoint registers */ 458c2ecf20Sopenharmony_ci#define HBP_NUM 4 468c2ecf20Sopenharmony_ci 478c2ecf20Sopenharmony_cistatic inline int hw_breakpoint_slots(int type) 488c2ecf20Sopenharmony_ci{ 498c2ecf20Sopenharmony_ci return HBP_NUM; 508c2ecf20Sopenharmony_ci} 518c2ecf20Sopenharmony_ci 528c2ecf20Sopenharmony_cistruct perf_event_attr; 538c2ecf20Sopenharmony_cistruct perf_event; 548c2ecf20Sopenharmony_cistruct pmu; 558c2ecf20Sopenharmony_ci 568c2ecf20Sopenharmony_ciextern int arch_check_bp_in_kernelspace(struct arch_hw_breakpoint *hw); 578c2ecf20Sopenharmony_ciextern int hw_breakpoint_arch_parse(struct perf_event *bp, 588c2ecf20Sopenharmony_ci const struct perf_event_attr *attr, 598c2ecf20Sopenharmony_ci struct arch_hw_breakpoint *hw); 608c2ecf20Sopenharmony_ciextern int hw_breakpoint_exceptions_notify(struct notifier_block *unused, 618c2ecf20Sopenharmony_ci unsigned long val, void *data); 628c2ecf20Sopenharmony_ci 638c2ecf20Sopenharmony_ci 648c2ecf20Sopenharmony_ciint arch_install_hw_breakpoint(struct perf_event *bp); 658c2ecf20Sopenharmony_civoid arch_uninstall_hw_breakpoint(struct perf_event *bp); 668c2ecf20Sopenharmony_civoid hw_breakpoint_pmu_read(struct perf_event *bp); 678c2ecf20Sopenharmony_civoid hw_breakpoint_pmu_unthrottle(struct perf_event *bp); 688c2ecf20Sopenharmony_ci 698c2ecf20Sopenharmony_ciextern void 708c2ecf20Sopenharmony_ciarch_fill_perf_breakpoint(struct perf_event *bp); 718c2ecf20Sopenharmony_ci 728c2ecf20Sopenharmony_ciunsigned long encode_dr7(int drnum, unsigned int len, unsigned int type); 738c2ecf20Sopenharmony_ciint decode_dr7(unsigned long dr7, int bpnum, unsigned *len, unsigned *type); 748c2ecf20Sopenharmony_ci 758c2ecf20Sopenharmony_ciextern int arch_bp_generic_fields(int x86_len, int x86_type, 768c2ecf20Sopenharmony_ci int *gen_len, int *gen_type); 778c2ecf20Sopenharmony_ci 788c2ecf20Sopenharmony_ciextern struct pmu perf_ops_bp; 798c2ecf20Sopenharmony_ci 808c2ecf20Sopenharmony_ci#endif /* _I386_HW_BREAKPOINT_H */ 81