counter_index_to_reg
reg = counter_index_to_reg(pmc->idx);
reg = counter_index_to_reg(pmc->idx);
__vcpu_assign_sys_reg(vcpu, counter_index_to_reg(select_idx), val);
reg = counter_index_to_reg(pmc->idx);
reg = __vcpu_sys_reg(vcpu, counter_index_to_reg(i)) + 1;
__vcpu_assign_sys_reg(vcpu, counter_index_to_reg(i), reg);