Re: [Qemu-devel] [PATCH 28/40] xenner: libxc emu: evtchn

[Anthony Liguori]

On 11/01/2010 10:49 AM, Alexander Graf wrote:
> On 01.11.2010, at 11:45, Anthony Liguori wrote:
>
>    
> > On 11/01/2010 10:01 AM, Alexander Graf wrote:
> >      
> > > Xenner emulates parts of libxc, so we can not use the real xen infrastructure
> > > when running xen pv guests without xen.
> > >
> > > This patch adds support for event channel communication.
> > >
> > > Signed-off-by: Alexander Graf<address@hidden>
> > >
> > >        
> > Has anyone checked with the Xen folks about supporting this type of 
> > functionality in libxc directly?
> >      
>
> The issue I have with libxc is that it goes orthogonal to the qemu 
> infrastructure way of doing things. If we base on libxc, we will never be able 
> to do cross-architecture execution of xen pv guests. Do we really want to go 
> that way?
>    

IIUC, this is a mini-libxc that you enable by mucking with 
LD_LIBRARY_PATH such that you can run things like xenstored unmodified.  
What I'm really asking is whether there has been a discussion about a 
more pleasant way to do this that the Xen guys would feel comfortable with.

I'd feel a little weird if someone was replacing a part of QEMU via 
LD_LIBRARY_PATH trickery.  It's better to try to work out a proper 
solution with the upstream community than to do trickery.

I'm not entirely opposed to this if the Xen guys say they don't want 
anything to do with Xenner, but we should have the discussion at least.

Regards,

Anthony Liguori

> Alex
>
>