KVM: MMU: handle large host sptes on invlpg/resync

The invlpg and sync walkers lack knowledge of large host sptes,
descending to non-existant pagetable level.

Stop at directory level in such case.

Fixes SMP Windows XP with hugepages.

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/mmu.c b/arch/x86/kvm/mmu.c
index d50ebac6a07f..83f11c7474a1 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -1007,7 +1007,7 @@ static int __mmu_unsync_walk(struct kvm_mmu_page *sp,
         for_each_unsync_children(sp->unsync_child_bitmap, i) {
                 u64 ent = sp->spt[i];
 
-                if (is_shadow_present_pte(ent)) {
+                if (is_shadow_present_pte(ent) && !is_large_pte(ent)) {
                         struct kvm_mmu_page *child;
                         child = page_header(ent & PT64_BASE_ADDR_MASK);