PCI Forwarding
You can allow a domU to access arbitrary PCI devices and use them with full privileges. Of course, there's no such thing as a free lunch; Xen can't miraculously duplicate PCI hardware. For a domU to use a PCI device, it has to be hidden from the dom0 and not forwarded to any other domUs.
Figure 14-1. Xen PCI device forwarding
As Figure 14-1 shows, PCI forwarding uses a client/server model in which the pcifront driver runs in the domU and communicates directly with the pciback driver, which binds to the PCI device and hides it from the dom0.
First, consider the device that you want to forward to the domU. The test machine that we're sitting ...
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