From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752556AbdJFR0T (ORCPT ); Fri, 6 Oct 2017 13:26:19 -0400 Received: from mx1.redhat.com ([209.132.183.28]:34078 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752153AbdJFR0P (ORCPT ); Fri, 6 Oct 2017 13:26:15 -0400 DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 640D37C843 Authentication-Results: ext-mx03.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx03.extmail.prod.ext.phx2.redhat.com; spf=fail smtp.mailfrom=rkrcmar@redhat.com From: =?UTF-8?q?Radim=20Kr=C4=8Dm=C3=A1=C5=99?= To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: Paolo Bonzini , Wanpeng Li Subject: [PATCH 1/3] KVM: x86: handle 0 write to TSC_DEADLINE MSR Date: Fri, 6 Oct 2017 19:25:53 +0200 Message-Id: <20171006172555.30087-2-rkrcmar@redhat.com> In-Reply-To: <20171006172555.30087-1-rkrcmar@redhat.com> References: <20171006172555.30087-1-rkrcmar@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.27]); Fri, 06 Oct 2017 17:26:15 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 0 should disable the timer, but start_hv_timer will recognize it as an expired timer instead. Signed-off-by: Radim Krčmář --- arch/x86/kvm/lapic.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index 2c9e88a82738..39c1ae11ce1d 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -1549,6 +1549,9 @@ static bool start_hv_timer(struct kvm_lapic *apic) if (!apic_lvtt_period(apic) && atomic_read(&ktimer->pending)) return false; + if (!ktimer->tscdeadline) + return false; + r = kvm_x86_ops->set_hv_timer(apic->vcpu, ktimer->tscdeadline); if (r < 0) return false; -- 2.14.2