Messages in this thread Patch in this message | | | Date | Fri, 04 Sep 2009 13:07:25 -0700 | From | Greg KH <> | Subject | [patch 13/48] KVM: MMU: Fix setting the accessed bit on non-speculative sptes |
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2.6.27-stable review patch. If anyone has any objections, please let us know.
------------------ From: Avi Kivity <avi@qumranet.com>
(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 PT_ACCESSED_MASK.
Fix by turning the bit on in the spte and changing it to use the portable accessed mask.
Signed-off-by: Avi Kivity <avi@qumranet.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> --- 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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