HBP_NUM_MAX
struct perf_event *ptrace_bps[HBP_NUM_MAX];
struct arch_hw_breakpoint hw_brk[HBP_NUM_MAX]; /* hardware breakpoint info */
static DEFINE_PER_CPU(struct perf_event *, bp_per_reg[HBP_NUM_MAX]);
struct perf_event *bp[HBP_NUM_MAX] = { NULL };
int hit[HBP_NUM_MAX] = {0};
static DEFINE_PER_CPU(struct arch_hw_breakpoint, current_brk[HBP_NUM_MAX]);
static struct bpt dabr[HBP_NUM_MAX];