On Tue, Aug 10, 2021 at 02:47:27PM +0200, Paolo Bonzini wrote: > On 10/08/21 13:00, Yu Zhang wrote: > > I guess it's because, unlike EPT which are with either 4 or 5 levels, NPT's > > level can range from 2 to 5, depending on the host paging mode... > > Yes, on Linux that will be one of 3/4/5 based on host paging mode, and it > will apply to all N_CR3... > > > But shadow EPT does not have such annoyance. Is above understanding correct? > > ... Right, because shadow EPT cannot have less than 4 levels, and it can > always use 4 levels if that's what L1 uses. Interesting. :) Thanks a lot for the explanation! B.R. Yu
