Re: unbind xen3 frontend drivers

[Christoph Egger <Christoph_Egger%gmx.de@localhost>]

Manuel Bouyer wrote:
> 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.

That's mainly because I need a files.xendev to use for non-XEN kernel
configs.

Christoph