ratio_2_msr_perf
msr |= HWP_MIN_PERF(ratio_2_msr_perf(hwp_req->hwp_min));
msr |= HWP_MAX_PERF(ratio_2_msr_perf(hwp_req->hwp_max));
msr |= HWP_DESIRED_PERF(ratio_2_msr_perf(hwp_req->hwp_desired));