1. A method of accessing a self-virtualizing input/output (IO) resource with multiple logical partitions in a data processing system, the method comprising: interfacing a logical partition of the multiple logical partitions to an associated adjunct partition through a vendor-independent virtual network partition interface, the adjunct partition including a vender-independent server virtual network partition interface device driver configured to interface with the logical partition and a resource-specific device driver configured to interface with the self-virtualizing IO resource; and in the logical partition, accessing the self-virtualizing IO resource by communicating with the vender-independent server virtual network partition interface device driver over the vendor-independent virtual network partition interface using a vendor-independent client virtual network partition interface device driver resident in the logical partition.