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KVM: VMX: do not check bit 12 of EPT violation exit qualification when undefined

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Bit 12 is undefined in any of the following cases:
- If the "NMI exiting" VM-execution control is 1 and the "virtual NMIs"
  VM-execution control is 0.
- If the VM exit sets the valid bit in the IDT-vectoring information field

Signed-off-by: Gleb Natapov <gleb@redhat.com>
[Add parentheses around & within && - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Gleb Natapov 2013-09-25 10:58:22 +03:00 committed by Paolo Bonzini
parent ac570e0493
commit bcd1c29495
1 changed files with 3 additions and 1 deletions
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4
arch/x86/kvm/vmx.c
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@ -5345,7 +5345,9 @@ static int handle_ept_violation(struct kvm_vcpu *vcpu)
* There are errata that may cause this bit to not be set:
* AAK134, BY25.
*/
if (exit_qualification & INTR_INFO_UNBLOCK_NMI)
if (!(to_vmx(vcpu)->idt_vectoring_info & VECTORING_INFO_VALID_MASK) &&
cpu_has_virtual_nmis() &&
(exit_qualification & INTR_INFO_UNBLOCK_NMI))
vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO, GUEST_INTR_STATE_NMI);
gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS);