From patchwork Tue Oct 27 09:58:01 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Avi Kivity X-Patchwork-Id: 56069 Received: from vger.kernel.org (vger.kernel.org [209.132.176.167]) by demeter.kernel.org (8.14.2/8.14.2) with ESMTP id n9R9w7Hv020875 for ; Tue, 27 Oct 2009 09:58:07 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752610AbZJ0J6B (ORCPT ); Tue, 27 Oct 2009 05:58:01 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752537AbZJ0J6B (ORCPT ); Tue, 27 Oct 2009 05:58:01 -0400 Received: from mx1.redhat.com ([209.132.183.28]:35191 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752525AbZJ0J6A (ORCPT ); Tue, 27 Oct 2009 05:58:00 -0400 Received: from int-mx03.intmail.prod.int.phx2.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.16]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id n9R9w3v6030244; Tue, 27 Oct 2009 05:58:03 -0400 Received: from cleopatra.tlv.redhat.com (cleopatra.tlv.redhat.com [10.35.255.11]) by int-mx03.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id n9R9w2I6031791; Tue, 27 Oct 2009 05:58:02 -0400 Received: from balrog.qumranet.com (dhcp-1-197.tlv.redhat.com [10.35.1.197]) by cleopatra.tlv.redhat.com (Postfix) with ESMTP id 413BE25004A; Tue, 27 Oct 2009 11:58:01 +0200 (IST) Message-ID: <4AE6C429.9060408@redhat.com> Date: Tue, 27 Oct 2009 11:58:01 +0200 From: Avi Kivity User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.4pre) Gecko/20091014 Fedora/3.0-2.8.b4.fc11 Thunderbird/3.0b4 MIME-Version: 1.0 To: Martin Gallant CC: kvm@vger.kernel.org Subject: Re: "-cpu host" AMD Host References: <002301ca5676$367494a0$a35dbde0$@net> <4AE6BFBB.6080907@redhat.com> In-Reply-To: <4AE6BFBB.6080907@redhat.com> X-Scanned-By: MIMEDefang 2.67 on 10.5.11.16 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org From d8e9cf4f4f688873456b297d78be70c5c328489c Mon Sep 17 00:00:00 2001 From: Andre Przywara Date: Wed, 24 Jun 2009 12:44:34 +0200 Subject: [PATCH -stable] KVM: ignore reads from AMDs C1E enabled MSR If the Linux kernel detects an C1E capable AMD processor (K8 RevF and higher), it will access a certain MSR on every attempt to go to halt. Explicitly handle this read and return 0 to let KVM run a Linux guest with the native AMD host CPU propagated to the guest. Signed-off-by: Andre Przywara Signed-off-by: Avi Kivity (cherry picked from commit 1fdbd48c242db996107f72ae4140ffe8163e26a8) --- arch/x86/kvm/x86.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 8aafb62..aa4c46f 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -949,6 +949,7 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) case MSR_P6_EVNTSEL0: case MSR_P6_EVNTSEL1: case MSR_K7_EVNTSEL0: + case MSR_K8_INT_PENDING_MSG: data = 0; break; case MSR_MTRRcap: -- 1.6.5.2