>On Mon, May 16, 2016 at 12:00 PM, Francis Greaves <francis at choughs.net> wrote: >> Dear George please find attached the three files as requested. >> I have used >> >> iommu=soft >> >> in the grub command line for the kernel in the domU as explained before. >> many thanks >The options are: >1. Figure out what the other device is and assign them both to the guest >2. Tell Xen that you don't mind the sharing. > >You should only do #2 if you're not using Xen for isolation -- i.e., >if you trust the software in that VM not to attack dom0. > >I *think* you should be able to do #2 by adding 'rdm_policy=relaxed' >to your pci stanza; i.e., it should look like this: > >pci=['00:1a.0,rdm_policy=relaxed'] Dear George That worked, do I still need to add this to the cfg file? usb=1 usbdevice=['host:0529:0514'] or how do I assign the device without the 'rdm_policy=relaxed' option as per option 1? Thanks so much for your speedy advice. Francis