APICBASE_EN
if (!ISSET(apicbase, APICBASE_EN)) {
apicbase |= APICBASE_EN;
return (msr & (APICBASE_EN | APICBASE_EXTD)) ==
(APICBASE_EN | APICBASE_EXTD);
wrmsr(MSR_APICBASE, lapic_base | APICBASE_EN);