From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 66574C06511 for ; Tue, 2 Jul 2019 13:24:13 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 0238B2146F for ; Tue, 2 Jul 2019 13:24:12 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0238B2146F Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:53574 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hiIlY-0000LQ-3B for qemu-devel@archiver.kernel.org; Tue, 02 Jul 2019 09:24:12 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:59676) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hiIkN-0007sh-Rn for qemu-devel@nongnu.org; Tue, 02 Jul 2019 09:23:00 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hiIkN-0001WU-1f for qemu-devel@nongnu.org; Tue, 02 Jul 2019 09:22:59 -0400 Received: from mx1.redhat.com ([209.132.183.28]:35038) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hiIkM-0001Vb-P9 for qemu-devel@nongnu.org; Tue, 02 Jul 2019 09:22:58 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 01A457EBC4; Tue, 2 Jul 2019 13:22:58 +0000 (UTC) Received: from redhat.com (ovpn-124-236.rdu2.redhat.com [10.10.124.236]) by smtp.corp.redhat.com (Postfix) with SMTP id DF2195D6A9; Tue, 2 Jul 2019 13:22:47 +0000 (UTC) Date: Tue, 2 Jul 2019 09:22:45 -0400 From: "Michael S. Tsirkin" To: Gerd Hoffmann Message-ID: <20190702092221-mutt-send-email-mst@kernel.org> References: <20190628115349.60293-1-slp@redhat.com> <20190628115349.60293-3-slp@redhat.com> <20190628100145-mutt-send-email-mst@kernel.org> <87r27dwi1k.fsf@redhat.com> <20190630173354-mutt-send-email-mst@kernel.org> <20190702081910.e35g4aawxp3ofhy6@sirius.home.kraxel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190702081910.e35g4aawxp3ofhy6@sirius.home.kraxel.org> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.27]); Tue, 02 Jul 2019 13:22:58 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: Re: [Qemu-devel] [PATCH 2/4] hw/virtio: Factorize virtio-mmio headers X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: pbonzini@redhat.com, rth@twiddle.net, qemu-devel@nongnu.org, Sergio Lopez , ehabkost@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Tue, Jul 02, 2019 at 10:19:10AM +0200, Gerd Hoffmann wrote: > > > > I am not sure we want a new machine with 0.X mmio devices. > > > > Especially considering that virtio-mmio does not have support for > > > > transitional devices. > > > > > > What are the practical implications of that? > > > > On the plus side, this means we don't need to maintain a bunch of hacks > > for old guests with quirky drivers. > > Also note that some newer virtio devices require virtio 1.0. > > cheers, > Gerd Right. I forgot.