* Avi Kivity <[email protected]> wrote:
> On 05/30/2011 11:52 AM, Ingo Molnar wrote:
> >* Avi Kivity<[email protected]> wrote:
> >
> >> > Another option would be to try to set the SMEP bit *before* we
> >> > enable paging. In theory this should not confuse a Linux guest -
> >> > and while i have not tested it i *think* we let it survive in the
> >> > saved_cr4_features shadow variable. That would make guest
> >> > suspend/resume work out of box as well.
> >>
> >> Is there any reason not to do it in a hidden way in kvm? Why must
> >> we play tricks?
> >
> > So do you have a suggestion of how to do this cleaner?
> >
> > Add an ioctl that allows a VCPU to be configured in a way to set
> > a cr4 feature without the guest actually seeing that bit?
> > [Assuming both cr4 reads and writes are fully captured by KVM and
> > thus guest behavior is controllable.]
>
> Yes, this was what I suggested before. IIRC you liked it.
Oh, it wasn't clear to me that this was your preference as well - and
i didnt see such a capability in this series [let me know if i
blindly missed it] so i was wondering what the battle plan was fr
that :-)
Thanks,
Ingo
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