KVM: MMU: out of sync shadow core

Allow guest pagetables to go out of sync.  Instead of emulating write
accesses to guest pagetables, or unshadowing them, we un-write-protect
the page table and allow the guest to modify it at will.  We rely on
invlpg executions to synchronize individual ptes, and will synchronize
the entire pagetable on tlb flushes.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h
index dc169e8148b1..613ec9aa674a 100644
--- a/arch/x86/kvm/paging_tmpl.h
+++ b/arch/x86/kvm/paging_tmpl.h
@@ -580,7 +580,7 @@ static int FNAME(sync_page)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp)
                 pte_access = sp->role.access & FNAME(gpte_access)(vcpu, gpte);
                 set_spte(vcpu, &sp->spt[i], pte_access, 0, 0,
                          is_dirty_pte(gpte), 0, gfn,
-                         spte_to_pfn(sp->spt[i]), true);
+                         spte_to_pfn(sp->spt[i]), true, false);
         }
 
         return !nr_present;