Re: [Qemu-devel] virtio-rng and fd passing

[Stefan Berger]

On 03/01/2013 03:04 PM, Anthony Liguori wrote:
> Eric Blake <address@hidden> writes:
>
> > Stefan Berger and I discovered on IRC that virtio-rng is unable to
> > support fd passing.  We attempted:
> >
> > qemu-system-x86_64 ... -add-fd set=4,fd=34,opaque=RDONLY:/dev/urandom
> > -object rng-random,id=rng0,filename=/dev/fdset/4 -device
> > virtio-rng-pci,rng=rng0,bus=pci.0,addr=0x6
> Why are you using th rng-random backend instead of the rng-egd backend?

I followed the example on the libvirt website trying out the XML for the 
rng device while adpating the libvirt code to use fd passing and 
generating the -add-fd command line parameters.

> You can pass chardevs to the egd backend.  It's really not a good idea
> to pass a fd via rng-rangom.

Fine, then we won't use fd passing for this device, whatever the reason 
may be.

   Stefan