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kvm: mmu: extend the is_present check to 32 bits 

This is safe because this function is called
on host controlled page table and non-present/non-MMIO
sptes never use bits 1..31. For the EPT case, this
ensures that cases where only the execute bit is set
is marked valid.

Signed-off-by: Bandan Das <bsd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Bandan Das 2016-07-12 18:18:48 -04:00 committed by Paolo Bonzini
parent 6d5315b3a6
commit 8d5cf1610d
1 changed files with 1 additions and 1 deletions
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2
arch/x86/kvm/mmu.c
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@ -304,7 +304,7 @@ static int is_nx(struct kvm_vcpu *vcpu)
static int is_shadow_present_pte(u64 pte)
{
return pte & PT_PRESENT_MASK && !is_mmio_spte(pte);
return (pte & 0xFFFFFFFFull) && !is_mmio_spte(pte);
}
static int is_large_pte(u64 pte)