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

[Marcelo Tosatti <mtosatti@redhat.com>]

[-- Attachment #1: kvm-shadow-iterator-largepage-descend --]
[-- Type: text/plain, Size: 701 bytes --]

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>

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;

--