From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:39583) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XMGIm-0006na-Qi for qemu-devel@nongnu.org; Tue, 26 Aug 2014 08:56:50 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XMGIe-00053u-2o for qemu-devel@nongnu.org; Tue, 26 Aug 2014 08:56:44 -0400 Received: from mx1.redhat.com ([209.132.183.28]:13994) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XMGId-00053q-RZ for qemu-devel@nongnu.org; Tue, 26 Aug 2014 08:56:36 -0400 Message-ID: <53FC83F5.2090905@redhat.com> Date: Tue, 26 Aug 2014 14:56:21 +0200 From: Paolo Bonzini MIME-Version: 1.0 References: <1408999550-20321-1-git-send-email-ehabkost@redhat.com> In-Reply-To: <1408999550-20321-1-git-send-email-ehabkost@redhat.com> Content-Type: text/plain; charset=iso-8859-15 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH v2 0/6] target-i386: Make most CPU models work with "enforce" out of the box List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Eduardo Habkost , qemu-devel@nongnu.org, =?ISO-8859-15?Q?Andreas_F=E4rber?= Cc: Aurelien Jarno , kvm@vger.kernel.org Il 25/08/2014 22:45, Eduardo Habkost ha scritto: > > TCG users expect the default CPU model to contain most TCG-supported features > (and it makes sense). See, for example, commit > f1e00a9cf326acc1f2386a72525af8859852e1df. It doesn't though (SMAP is the most egregious omission, and probably the main reason why people use QEMU TCG these days), and it raises the question of backwards-compatibility of qemu64---should we disable TCG features in old machine types? Probably yes, but we've never done that. Paolo