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Date: Wed, 02 Nov 2011 13:29:39 -0500
From: Anthony Liguori <anthony@codemonkey.ws>
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Subject: Re: [Qemu-devel] GSoC mentor summit QEMU users session
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To: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Peter Maydell <peter.maydell@linaro.org>, Alexander Graf <agraf@suse.de>, Fabien Chouteau <chouteau@adacore.com>, "qemu-devel@nongnu.org Developers" <qemu-devel@nongnu.org>

On 11/02/2011 01:17 PM, Jan Kiszka wrote:
> On 2011-11-02 18:44, Fabien Chouteau wrote:
>> On 31/10/2011 14:12, Peter Maydell wrote:
>>> On 29 October 2011 14:52, Alexander Graf<agraf@suse.de>  wrote:
>>>> A lot of people seem to also have code that doesn't make sense
>>>> upstream, for example implementing a one-off device that only
>>>> really matters for their own devboard which nobody else owns.
>>>> For such cases, having a plugin framework would be handy. I
>>>> interestingly enough got into the same discussion on LinuxCon
>>>> with some QEMU downstreams.
>>>
>>> If we get the qdev rework done then I think we're probably in
>>> a better position to have a plugin framework for devices. (There
>>> are some issues about API and ABI stability guarantees, of course.)
>>>
>>
>> Interesting, we have a "plug-in" implementation in our Qemu branch. It
>
> We have a "plugin" model here as well. It's really simple: the plugin is
> loaded dynamically into the QEMU process and can access any global
> function and variable. Of course, this breaks regularly.

Yes, this is the Right Model.

All of the work is in making the interfaces not break regularly.  Loading a 
shared object is easy enough.

Regards,

Anthony Liguori