LXR linux/arch/x86/include/asm/hw

   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 */
  13struct 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
  46static inline int hw_breakpoint_slots(int type)
  47{
  48        return HBP_NUM;
  49}
  50
  51struct perf_event;
  52struct pmu;
  53
  54extern int arch_check_bp_in_kernelspace(struct perf_event *bp);
  55extern int arch_validate_hwbkpt_settings(struct perf_event *bp);
  56extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused,
  57                                           unsigned long val, void *data);
  58
  59
  60int arch_install_hw_breakpoint(struct perf_event *bp);
  61void arch_uninstall_hw_breakpoint(struct perf_event *bp);
  62void hw_breakpoint_pmu_read(struct perf_event *bp);
  63void hw_breakpoint_pmu_unthrottle(struct perf_event *bp);
  64
  65extern void
  66arch_fill_perf_breakpoint(struct perf_event *bp);
  67
  68unsigned long encode_dr7(int drnum, unsigned int len, unsigned int type);
  69int decode_dr7(unsigned long dr7, int bpnum, unsigned *len, unsigned *type);
  70
  71extern int arch_bp_generic_fields(int x86_len, int x86_type,
  72                                  int *gen_len, int *gen_type);
  73
  74extern struct pmu perf_ops_bp;
  75
  76#endif  /* _I386_HW_BREAKPOINT_H */
  77