Re: [PATCH] sound support for qemu and xen

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Daniel P. Berrange wrote:
> On Mon, Apr 21, 2008 at 01:02:35PM -0400, Cole Robinson wrote:
>> The patch below adds xml support for the soundhw option to qemu
>> and xen. The new xml element takes the form:
>>
>> <sound driver='drivername'/>
>>
>> Where driver name can be pcspk, sb16, es1370, or all.
> 
> I'd like to use 'model' instead of 'driver', since we use 
> 'model' in the network driver to specify the type of hardware
> and will do the same with disks too in the future.
> 
> ie
>  
>    <sound  model='sb16'/>
> 

Makes sense. I'll make the change.

>> Everything seems to be in working order but I have a few
>> implementation questions:
>>
>> 1) Should multiple drivers be able to be specified? qemu
>> accommodates this, allowing  '-soundhw sb16,pcspk' for example.
>> If this should be allowed, what should the xml format be? 
> 
> It should be represented as multiple  <source> tags in the XML.
> The fact that is multiplexes onto a single -soundhw arg is an
> implementation detail that should remain hidden.
> 

Did you mean <sound> tags? Something like:

<sound model='d1'/>
<sound model='d2'/>


>> 2) Should acceptable driver options be hardcoded? The other option
>> is to just pass the input straight to qemu. This patch has the
>> options hardcoded.
> 
> I prefer to have it hardcoded because it lets us explicitly block
> the string 'all'.  The string 'all' is an implementation detail to
> which no reliable semantics can be assigned and should not be allowed
> by libvirt.
>

Okay, I follow. I'll remove 'all' from the whitelist.
 
Thanks,
Cole

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