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From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: Fri, 15 Nov 2013 10:31:53 +1100
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Subject: Re: [Qemu-devel] -vga std vs. -device VGA
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To: Peter Maydell <peter.maydell@linaro.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 Thu, 2013-11-14 at 23:03 +0000, Peter Maydell wrote:
> 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 :-)

Ok, as long as everybody agrees then I don't have a problem with that,
but we'll need libvirt to grow some smarts.

Alexey, can you handle that ?

Cheers,
Ben.