[PATCH] KVM: MMU: Write protect guest pages when a shadow is created for them

When we cache a guest page table into a shadow page table, we need to prevent
further access to that page by the guest, as that would render the cache
incoherent.

Signed-off-by: Avi Kivity <avi@qumranet.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/kvm/paging_tmpl.h b/drivers/kvm/paging_tmpl.h
index f7cce443ca6f..cd71973c780c 100644
--- a/drivers/kvm/paging_tmpl.h
+++ b/drivers/kvm/paging_tmpl.h
@@ -133,6 +133,7 @@ static void FNAME(walk_addr)(struct guest_walker *walker,
                          walker->level - 1, table_gfn);
         }
         walker->ptep = ptep;
+        pgprintk("%s: pte %llx\n", __FUNCTION__, (u64)*ptep);
 }
 
 static void FNAME(release_walker)(struct guest_walker *walker)