On 10.08.2017 21:40, Bandan Das wrote: > David Hildenbrand <david@xxxxxxxxxx> writes: > >> We already always set that type but don't check if it is supported. Also >> for nVMX, we only support WB for now. Let's just require it. > > Out of curiosity, is there old hardware that supports ept but not WB ? > I guess no. KVM always sets up WB for all eptps. KVM would in the current state simply not work on these machines (vm entry failure). I guess the same is also true for 4level page-walk length. This should also be part of any EPT implementation but still we have to check for it. -- Thanks, David
