repository: /home/avi/kvm/linux-2.6
branch: rmap-corruption-fix
commit 154833765b9edde8fbc40cd30b2f0270bd6734d2
Author: Avi Kivity <[EMAIL PROTECTED]>
Date: Thu Oct 11 15:08:41 2007 +0200
KVM: MMU: Fix nx access bit for huge pages
We must set the bit before the shift, otherwise the wrong bit gets set.
Signed-off-by: Avi Kivity <[EMAIL PROTECTED]>
diff --git a/drivers/kvm/paging_tmpl.h b/drivers/kvm/paging_tmpl.h
index da36e48..e07cb2e 100644
--- a/drivers/kvm/paging_tmpl.h
+++ b/drivers/kvm/paging_tmpl.h
@@ -382,9 +382,9 @@ static u64 *FNAME(fetch)(struct kvm_vcpu *vcpu, gva_t addr,
metaphysical = 1;
hugepage_access = walker->pte;
hugepage_access &= PT_USER_MASK | PT_WRITABLE_MASK;
+ hugepage_access >>= PT_WRITABLE_SHIFT;
if (walker->pte & PT64_NX_MASK)
hugepage_access |= (1 << 2);
- hugepage_access >>= PT_WRITABLE_SHIFT;
table_gfn = (walker->pte & PT_BASE_ADDR_MASK)
>> PAGE_SHIFT;
} else {
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