1. A method, comprising: in a computing system comprising a multi-level system memory where the multi-level system memory comprises a near memory cache, and wherein the computing system directs system memory access requests whose addresses map to a same near memory cache slot to a same home caching agent so that the same home caching agent can characterize individual cache lines as inclusive or non-inclusive before forwarding the requests to a system memory controller, directing other system memory access requests to the system memory controller without passing the other requests through a home caching agent and modifying respective original addresses of the other requests to include a special code that causes the other system memory access requests to map to a specific pre-determined set of slots within the near memory cache.