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

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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>
This commit is contained in:
Marcelo Tosatti
2008-12-22 18:49:30 -02:00
committed by Avi Kivity
parent 3f353858c9
commit 8791723920
2 changed files with 8 additions and 3 deletions
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2
arch/x86/kvm/mmu.c
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@@ -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);