MSR_PM_ENABLE
wrmsrq_on_cpu(cpudata->cpu, MSR_PM_ENABLE, 0x1);
rdmsrq(MSR_PM_ENABLE, value);
rdmsrq(MSR_PM_ENABLE, value);
if (get_msr(cpu, MSR_PM_ENABLE, &msr))
get_msr(cpu, MSR_PM_ENABLE, &old_msr);
put_msr(cpu, MSR_PM_ENABLE, new_msr);
get_msr(cpu_num, MSR_PM_ENABLE, &msr);