[patch 13/48] KVM: MMU: Fix setting the accessed bit on non-speculative sptes

From: Greg KH
Date: Fri Sep 04 2009 - 16:22:09 EST

2.6.27-stable review patch. If anyone has any objections, please let us know.

From: Avi Kivity <avi@xxxxxxxxxxxx>

(cherry picked from commit 3201b5d9f0f7ef392886cd76dcd2c69186d9d5cd)

The accessed bit was accidentally turned on in a random flag word, rather
than, the spte itself, which was lucky, since it used the non-EPT compatible

Fix by turning the bit on in the spte and changing it to use the portable
accessed mask.

Signed-off-by: Avi Kivity <avi@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
arch/x86/kvm/mmu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -1162,7 +1162,7 @@ static void mmu_set_spte(struct kvm_vcpu
spte = shadow_base_present_pte | shadow_dirty_mask;
if (!speculative)
- pte_access |= PT_ACCESSED_MASK;
+ spte |= shadow_accessed_mask;
if (!dirty)
pte_access &= ~ACC_WRITE_MASK;
if (pte_access & ACC_EXEC_MASK)

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