IBS_OP_CTL_ENABLE
config = pm->pm_md.pm_ibs.ibs_ctl | IBS_OP_CTL_ENABLE;
config &= ~IBS_OP_CTL_ENABLE;
wrmsr(IBS_OP_CTL, pm->pm_md.pm_ibs.ibs_ctl | IBS_OP_CTL_ENABLE);