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Date: Mon, 25 Jul 2011 14:27:05 +0200
From: Jan Kiszka <jan.kiszka@siemens.com>
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Subject: Re: [Qemu-devel] [RESEND][PATCH v3] Generalize -machine command
 line option
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To: Peter Maydell <peter.maydell@linaro.org>
Cc: Anthony PERARD <anthony.perard@citrix.com>, Ian Campbell <Ian.Campbell@eu.citrix.com>, Anthony Liguori <aliguori@us.ibm.com>, "Richard W.M. Jones" <rjones@redhat.com>, qemu-devel <qemu-devel@nongnu.org>

On 2011-07-25 14:22, Peter Maydell wrote:
> On 25 July 2011 13:18, Jan Kiszka <jan.kiszka@siemens.com> wrote:
>> On 2011-07-25 14:05, Peter Maydell wrote:
>>> In fact having thought about it a bit I'm going to go further
>>> and say that the whole idea of a "default machine" is a rather
>>> x86-centric idea -- most architectures don't really have a
>>> single machine type that's used by just about everybody,
>>> always has been, and isn't likely to become obsolete in the
>>> future. So if we're reworking the command line API to
>>> supersede "-M" then we shouldn't have a default at all.
>>
>> Then you may want to drop is_default = 1 from integratorcp and prepare
>> the main loop to face a NULL machine.
> 
> We can't change the default machine for -M, that would break
> backwards compatibility. All we can do is avoid having a notion
> of "default machine" in new command line syntax.

The new syntax can't change is that as we cannot tell apart the omitting
of -M from that of -machine. Both will have the semantic "use default
machine".

Jan

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