int hw_breakpoint_arch_parse()

in kernel/hw_breakpoint.c [50:83]

• 28 lines of code
• 8 McCabe index (conditional complexity)

int hw_breakpoint_arch_parse(struct perf_event *bp,
			     const struct perf_event_attr *attr,
			     struct arch_hw_breakpoint *hw)
{
	/* Type */
	switch (attr->bp_type) {
	case HW_BREAKPOINT_X:
		hw->type = XTENSA_BREAKPOINT_EXECUTE;
		break;
	case HW_BREAKPOINT_R:
		hw->type = XTENSA_BREAKPOINT_LOAD;
		break;
	case HW_BREAKPOINT_W:
		hw->type = XTENSA_BREAKPOINT_STORE;
		break;
	case HW_BREAKPOINT_RW:
		hw->type = XTENSA_BREAKPOINT_LOAD | XTENSA_BREAKPOINT_STORE;
		break;
	default:
		return -EINVAL;
	}

	/* Len */
	hw->len = attr->bp_len;
	if (hw->len < 1 || hw->len > 64 || !is_power_of_2(hw->len))
		return -EINVAL;

	/* Address */
	hw->address = attr->bp_addr;
	if (hw->address & (hw->len - 1))
		return -EINVAL;

	return 0;
}