Re: [Qemu-devel] Re: [PATCH 15/15] Implement the bus structure for PAPR virtual IO

[Anthony Liguori]

On 02/13/2011 06:40 AM, Alexander Graf wrote:
> > Ah, yeah.  I'm still not sure what to do about it.  I was going to
> > fold the dynamic hcall registration into the patch set before
> > upstreaming.  But then something paulus said made me rethink whether
> > the dynamic registration was a good idea.  Still need to sort this out
> > before the series is really ready.
> >      
> We can surely move it to dynamic later on. I think the "proper" way would be to 
> populate a qdev bus and have the individual hypercall receivers register themselves 
> through -device creations.
>    

Ignore the qdev bit for a moment.  Hypercalls could be plausibly 
implemented as another I/O space from a processor so the thing to model 
off of would be PIO dispatch (cpu_outb and friends).

From a qdev perspective, having a VIO bus makes sense.  The details of 
which I/O spaces are uses are not as important from a device tree 
perspective.

Regards,

Anthony Liguori

> Alex
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