arch/x86/include/asm/hw_breakpoint.h

   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 */