Computing system fabric and routing configuration and description

A technique for configuring a computing system that allows for multiple computing systems and device populations to be supported by a single BIOS implementation is presented. In one embodiment, the technique includes processing topology map parameters that describe physical connections of a computing system, wherein the computing system includes a plurality of processing nodes; determining routing paths for traffic between the plurality of processing nodes; and determining a population of the plurality of processing nodes. In one embodiment, the determining the routing paths is performed during BIOS build time. In another embodiment, the determining the routing paths is performed during BIOS run time.