On Tue, Jul 16, 2019 at 08:02:43PM +0000, Singh, Brijesh wrote: > > On 7/16/19 2:34 PM, Liran Alon wrote: > > Why CPU needs to be at CPL3? > > The requirement for SMAP should be that this page is user-accessible in guest page-tables. > > Think on a case where guest have CR4.SMAP=1 and CR4.SMEP=0. > > > > We are discussing reserved NPF so we need to be at CPL3. For my own education, why does reserved NPF require CPL3? I.e. what happens if a reserved bit is encountered at CPL<3 (or do they simply not exist)?
