From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:54108) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SoAzY-0008Dg-NB for qemu-devel@nongnu.org; Mon, 09 Jul 2012 06:15:02 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1SoAzX-0001KU-4d for qemu-devel@nongnu.org; Mon, 09 Jul 2012 06:14:56 -0400 Received: from mx1.redhat.com ([209.132.183.28]:21629) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SoAzW-0001KL-St for qemu-devel@nongnu.org; Mon, 09 Jul 2012 06:14:55 -0400 Message-ID: <4FFAAF1B.7020004@redhat.com> Date: Mon, 09 Jul 2012 12:14:51 +0200 From: Gerd Hoffmann MIME-Version: 1.0 References: <1340714974-25489-1-git-send-email-agraf@suse.de> <4FFAA03D.6020302@redhat.com> <4FFAA40E.4070901@redhat.com> <583552B4-7D4C-4030-8792-203BB922000E@suse.de> <4FFAA9E0.1000406@redhat.com> In-Reply-To: <4FFAA9E0.1000406@redhat.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH v2] ahci: add -drive support List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Kevin Wolf Cc: qemu-devel qemu-devel , Alexander Graf , Markus Armbruster Hi, >> If -hda has the semantics of "create an IDE device", then no, we can't change it. It doesn't however. IIRC on -M pseries -hda creates SCSI devices. On s390 -hda creates virtio devices. So if on -M q35 -hda would create if=ahci, I don't see how that breaks the CLI. > > It doesn't per se, that is as long as you need to explicitly specify -M > q35. But then changing the default machine from the existing pc to q35 > would break the command line. That will happen _anyway_. No doubt there will be configurations which work with -M pc and break with -M q35. cheers, Gerd