Re: [Qemu-devel] Re: Planning for 0.13

[Anthony Liguori <aliguori@linux.vnet.ibm.com>]

On 01/06/2010 04:49 AM, Michael S. Tsirkin wrote:
>> What's the remaining problem?
>>      
> IIRC, proper memory/IO access filtering (get rid of map functions) and
> PCI Express.
>
>    
>>> vepa networking
>>>
>>>        
>> To me, this is covered with helpers.  I really want to get qemu out of
>> the network setup business specifically because of things like vepa,
>> vmtag, and all of the other weird things that can be done.
>>      
> I don't think you can now make vepa work this way.  For existing
> kernels, they only way I see is using packet sockets, and that code
> already mostly works.  One day, when macvtap is ready - who knows. But
> waiting for that would mean we won't have it in 0.13.
>    

We can use helpers for more than just tun/tap.  My current thinking for 
helpers is that they would give qemu an fd and then tell qemu how to 
work with it.  Basically, use read/write vs. send/recv, whether to use a 
virtio-net header or not, etc.

That would allow a helper to open a raw socket, configure macvlan, and 
then hand the fd over to qemu and tell qemu how to use it.

Regards,

Anthony Liguori