From f303b4ce8b386558b2b92aeb0c6af96685fcd4b2 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Radim=20Kr=C4=8Dm=C3=A1=C5=99?= <rkrcmar@redhat.com> Date: Fri, 17 Jan 2014 20:52:42 +0100 Subject: [PATCH] KVM: SVM: fix NMI window after iret MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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 3842d135ff2 (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 KrÄmáŠ<rkrcmar@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> --- arch/x86/kvm/svm.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index e81df8fce0275..64d9bb9590e34 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -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; } -- 2.30.2