On 28/02/20 09:45, Oliver Upton wrote: >> - a PV CPUID leaf to tell <=255 vCPUs on AMD virtualization _not_ to use >> x2apic. >> > If a VMM didn't want the guest to use x2APIC in the first place, shouldn't > it instead omit x2APIC from the guest CPUID? I can see a point for this > if folks are inclined to use the same CPUID for VMs regardless of shape. > Just a thought to tackle later down the road :) Yes, it's mostly for simplicity of configuration. Paolo
