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        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
  45static inline int hw_breakpoint_slots(int type)
  46{
  47        return HBP_NUM;
  48}
  49
  50struct perf_event;
  51struct pmu;
  52
  53extern int arch_check_bp_in_kernelspace(struct perf_event *bp);
  54extern int arch_validate_hwbkpt_settings(struct perf_event *bp);
  55extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused,
  56                                           unsigned long val, void *data);
  57
  58
  59int arch_install_hw_breakpoint(struct perf_event *bp);
  60void arch_uninstall_hw_breakpoint(struct perf_event *bp);
  61void hw_breakpoint_pmu_read(struct perf_event *bp);
  62void hw_breakpoint_pmu_unthrottle(struct perf_event *bp);
  63
  64extern void
  65arch_fill_perf_breakpoint(struct perf_event *bp);
  66
  67unsigned long encode_dr7(int drnum, unsigned int len, unsigned int type);
  68int decode_dr7(unsigned long dr7, int bpnum, unsigned *len, unsigned *type);
  69
  70extern int arch_bp_generic_fields(int x86_len, int x86_type,
  71                                  int *gen_len, int *gen_type);
  72
  73extern struct pmu perf_ops_bp;
  74
  75#endif  /* _I386_HW_BREAKPOINT_H */
  76