From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:45045) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZwuGp-0006IB-Rk for qemu-devel@nongnu.org; Thu, 12 Nov 2015 10:58:44 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZwuGn-0004uF-47 for qemu-devel@nongnu.org; Thu, 12 Nov 2015 10:58:43 -0500 Received: from mx1.redhat.com ([209.132.183.28]:1791) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZwuGm-0004u9-VW for qemu-devel@nongnu.org; Thu, 12 Nov 2015 10:58:41 -0500 Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22]) by mx1.redhat.com (Postfix) with ESMTPS id 9B064C0B1B4D for ; Thu, 12 Nov 2015 15:58:40 +0000 (UTC) References: <56446FB8.8070701@redhat.com> <20151112152510.GM4180@thinpad.lan.raisama.net> From: Paolo Bonzini Message-ID: <5644B72D.8080807@redhat.com> Date: Thu, 12 Nov 2015 16:58:37 +0100 MIME-Version: 1.0 In-Reply-To: <20151112152510.GM4180@thinpad.lan.raisama.net> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] -cpu check, rdtscp and AMD KVM List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Eduardo Habkost Cc: qemu-devel On 12/11/2015 16:25, Eduardo Habkost wrote: > On Thu, Nov 12, 2015 at 11:53:44AM +0100, Paolo Bonzini wrote: >> Eduardo, >> >> running QEMU 2.5 on SVM causes a warning because rdtscp is not supported >> by KVM. While I can fix it, that leaves a warning on all existing kernels. > > You mean when using Opteron_G2 or newer, right? qemu64 and kvm64 > don't have rdtscp enabled. > >> What do you think is the best way forward? > > To simply remove rdtscp from all Opteron_G* models? Not sure this is the right thing to do... Real hardware has it, and going forward KVM will provide it. Paolo