On Mon, 2021-07-12 at 08:02 -0500, harry harry wrote: > Dear Maxim, > > Thanks for your reply. I knew, in our current design/implementation, > EPT/NPT is enabled by a module param. I think it is possible to modify > the QEMU/KVM code to let it support EPT/NPT and show page table (SPT) > simultaneously (e.g., for an 80-core server, 40 cores use EPT/NPT and > the other 40 cores use SPT). What do you think? Thanks! > > Best regards, > Harry > > On Mon, Jul 12, 2021 at 4:49 AM Maxim Levitsky <mlevitsk@xxxxxxxxxx> wrote: > > On Sun, 2021-07-11 at 15:13 -0500, harry harry wrote: > > > Hi all, > > > > > > I hope you are very well! May I know whether it is possible to enable > > > two-dimensional page translation (e.g., Intel EPT) mechanisms and > > > shadow page table mechanisms in Linux QEMU/KVM at the same time on a > > > physical server? For example, if the physical server has 80 cores, is > > > it possible to let 40 cores use Intel EPT mechanisms for page > > > translation and the other 40 cores use shadow page table mechanisms? > > > Thanks! > > > > Nope sadly. EPT/NPT is enabled by a module param. > > > > Best regards, > > Maxim Levitsky > > > > > Best, > > > Harry > > > For same VM, I don't think it is feasable. For multiple VMs make some use NPT/EPT and some don't, this should be possible to implement. Why do you need it? Best regards, Maxim Levitsky
