Commit f303b4ce authored Jan 17, 2014 by Radim Krčmář Committed by Paolo Bonzini Feb 18, 2014

KVM: SVM: fix NMI window after iret



We should open NMI window right after an iret, but SVM exits before it.
We wanted to single step using the trap flag and then open it.
(or we could emulate the iret instead)
We don't do it since commit 3842d135 (likely), because the iret exit
handler does not request an event, so NMI window remains closed until
the next exit.

Fix this by making KVM_REQ_EVENT request in the iret handler.

Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

parent 5befdc38

arch/x86/kvm/svm.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -2842,6 +2842,7 @@ static int iret_interception(struct vcpu_svm *svm)
		clr_intercept(svm, INTERCEPT_IRET);
		svm->vcpu.arch.hflags \|= HF_IRET_MASK;
		svm->nmi_iret_rip = kvm_rip_read(&svm->vcpu);
		kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
		return 1;
		}

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