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[2/5] KVM: MMU: make for_each_shadow_entry aware of largepages

Message ID 20090611140416.633810344@localhost.localdomain (mailing list archive)
State New, archived
Headers show

Commit Message

Marcelo Tosatti June 11, 2009, 2:02 p.m. UTC 
This way there is no need to add explicit checks in every
for_each_shadow_entry user.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
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Patch

Index: kvm/arch/x86/kvm/mmu.c
===================================================================
--- kvm.orig/arch/x86/kvm/mmu.c
+++ kvm/arch/x86/kvm/mmu.c
@@ -1273,6 +1273,11 @@  static bool shadow_walk_okay(struct kvm_
 {
 	if (iterator->level < PT_PAGE_TABLE_LEVEL)
 		return false;
+
+	if (iterator->level == PT_PAGE_TABLE_LEVEL)
+		if (is_large_pte(*iterator->sptep))
+			return false;
+
 	iterator->index = SHADOW_PT_INDEX(iterator->addr, iterator->level);
 	iterator->sptep	= ((u64 *)__va(iterator->shadow_addr)) + iterator->index;
 	return true;