tree 2343268f9b507a99abf34bf20d99b1158488b67e
parent 812f30b234539ccb0139f92dfdbec1e8158cf535
author Bandan Das <bsd@redhat.com> 1468361929 -0400
committer Paolo Bonzini <pbonzini@redhat.com> 1468479794 +0200

kvm: mmu: don't set the present bit unconditionally

To support execute only mappings on behalf of L1
hypervisors, we need to teach set_spte() to honor all three of
L1's XWR bits.  As a start, add a new variable "shadow_present_mask"
that will be set for non-EPT shadow paging and clear for EPT.

Signed-off-by: Bandan Das <bsd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>