From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from eggs.gnu.org ([2001:4830:134:3::10]:52467)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <peter.maydell@linaro.org>) id 1Vh5wk-0001DF-6U
	for qemu-devel@nongnu.org; Thu, 14 Nov 2013 18:03:39 -0500
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <peter.maydell@linaro.org>) id 1Vh5wd-00059k-Jp
	for qemu-devel@nongnu.org; Thu, 14 Nov 2013 18:03:34 -0500
Received: from mail-la0-f46.google.com ([209.85.215.46]:47278)
	by eggs.gnu.org with esmtp (Exim 4.71)
	(envelope-from <peter.maydell@linaro.org>) id 1Vh5wd-00059e-D2
	for qemu-devel@nongnu.org; Thu, 14 Nov 2013 18:03:27 -0500
Received: by mail-la0-f46.google.com with SMTP id eh20so2174005lab.19
	for <qemu-devel@nongnu.org>; Thu, 14 Nov 2013 15:03:25 -0800 (PST)
MIME-Version: 1.0
In-Reply-To: <1384468340.3806.28.camel@pasglop>
References: <52845915.4030201@ozlabs.ru> <1384408904.3806.16.camel@pasglop>
	<528499F2.2060204@ozlabs.ru>
	<0EC3B49C-9DC8-4F7D-8BB3-D49DEFB8F510@suse.de>
	<1384460914.3806.25.camel@pasglop>
	<1FC02D0E-ED9E-4A75-A81A-295FB5324384@suse.de>
	<1384468340.3806.28.camel@pasglop>
From: Peter Maydell <peter.maydell@linaro.org>
Date: Thu, 14 Nov 2013 23:03:05 +0000
Message-ID: <CAFEAcA9QSwoqMZL-yozKq1tGuSNA+=vE3e1Ku0Dv3dMQLKfgOQ@mail.gmail.com>
Content-Type: text/plain; charset=UTF-8
Subject: Re: [Qemu-devel] -vga std vs. -device VGA
List-Id: <qemu-devel.nongnu.org>
List-Unsubscribe: <https://lists.nongnu.org/mailman/options/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>
List-Archive: <http://lists.nongnu.org/archive/html/qemu-devel>
List-Post: <mailto:qemu-devel@nongnu.org>
List-Help: <mailto:qemu-devel-request@nongnu.org?subject=help>
List-Subscribe: <https://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=subscribe>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>, Alexey Kardashevskiy <aik@ozlabs.ru>, Alexander Graf <agraf@suse.de>, "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>, Paul Mackerras <paulus@samba.org>, Avik Sil <aviksil@linux.vnet.ibm.com>, "qemu-ppc@nongnu.org" <qemu-ppc@nongnu.org>

On 14 November 2013 22:32, Benjamin Herrenschmidt
<benh@kernel.crashing.org> wrote:
> On Thu, 2013-11-14 at 17:23 -0500, Alexander Graf wrote:
>> Yes. But I think it's the correct thing to do in this case. X86 also
>> doesn't create a USB controller like we would have to. Our pseries
>> platform just doesn't have a legacy PC/AT keyboard controller.
>
> Sure, but that implies that -nodefaults -device VGA creates a working
> usable machine on x86 and not on pseries...

Sounds plausible. Anything using -nodefaults has to have
knowledge of every QEMU machine type it wants to use
so it can know which devices need adding in ordar to get
various functionality. ('-device VGA' doesn't work at all on
some, for instance). If you ask for full manual control, you
get full manual control :-)

-- PMM