On Tue, Jan 11, 2022, Maxim Levitsky wrote: > Both Intel and AMD's PRM also state that changing APIC ID is implementation > dependent. > > I vote to forbid changing apic id, at least in the case any APIC acceleration > is used, be that APICv or AVIC. That has my vote as well. For IPIv in particular there's not much concern with backwards compability, i.e. we can tie the behavior to enable_ipiv.
