> So it looks like pci passthrough should just work already and > XEN_PCI_PASSTHROUGH is some redundant option which doesn't do anything. The dom0 part is indeed OK; now I see that the problem is in the domU. Unfortunately, current debian kernels I use for domUs (2.6.32-5-686-bigmem and 2.6.32-5-amd64) do not have the required XEN pcifront driver yet. Will try to boot -xen kernels on domU... Kristof