MCG_EXT_CTL_LMCE_EN
if (!(val & MCG_EXT_CTL_LMCE_EN))
wrmsrq(MSR_IA32_MCG_EXT_CTL, val | MCG_EXT_CTL_LMCE_EN);
val &= ~MCG_EXT_CTL_LMCE_EN;
(msr->data & ~MCG_EXT_CTL_LMCE_EN))
(data & ~MCG_EXT_CTL_LMCE_EN))