Re: unbind xen3 frontend drivers

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Sat, Oct 25, 2008 at 12:43:43PM +0200, Jean-Yves Migeon wrote:
> Christoph Egger wrote:
> >Xen supports ia64 aside of x86. It allows to run
> >both HVM and PV guests.
> >HVM guests may also use PV drivers.
> >
> >In order to make PV drivers available for NetBSD
> >as HVM guest, I have to unbind the xen3 frontend
> >drivers from the PV guest only context.
> >
> >This means, I need to move the following files
> >into a seperate directory:
> >
> >if_xennet_xenbus.c
> >xbd_xenbus.c
> >xennet_checksum.c
> >
> >In my working tree, I moved them to
> >sys/arch/xen/dev
> >
> >Is this directory ok or
> >should I move them
> >to sys/dev/xen/xen and xenbus to sys/dev/xen/xenbus ?
> 
> While I am not the one who can make this decision, I prefer to have MI 
> code under sys/dev/xen.
> 
> Thing is, take if_xennet_xenbus.c for example, it relies on MD 
> functions, like x86 barriers and P2M translations. As a consequence, I 
> am not sure that sys/dev/xen is a good candidate; it stays pretty close 
> to x86, and not suitable for sys/dev/xen yet.

Yes, the code in arch/xen/xen is not ready to be MI yet (although I tried to
not put too much MD code in there) ... I'd prefer to keep in arch/xen
for now, and I can't see a need to move it to arch/xen/dev at this time.

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
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