Re: [PATCH v1 03/11] KVM: x86: dynamic kvm_apic_map

[Paolo Bonzini]

On 01/07/2016 17:43, Radim KrÄmÃÅ wrote:
> > Forgot to reply about this: letting SET_LAPIC change x2APIC IDs is nonsense.
> > 
> > In x2APIC mode + new capability disabled SET_LAPIC should ignore the id
> > register altogether for backwards compatibility.
> 
> I'd still shift SET_LAPIC APIC ID to have internal APIC ID register in
> hardware-compatible format.

With the capability disabled, APIC ID should always be in bits 31-24 for
both GET and SET.  But I think we agree, it's simpler to reason in v2
code and testcases. :)

Paolo