1. A method of host initialization in a logically partitioned data processing system, the method comprising the computer implemented steps of: allocating a first processing queue table segment in an adapter memory, wherein the first processing queue table segment is associated with a first system image allocated in a host memory of the logically partitioned data processing system; allocating, in the adapter memory, a first protection table segment that defines attributes of a plurality of regions of the host memory, wherein the plurality of regions are associated with the first system image allocated in the host memory of the logically partitioned data processing system; allocating, in the adapter memory, a first address table segment associated with an entry in the first protection table segment that respectively defines physical addresses associated with the entry in the first protection table segment; and responsive to allocating the first protection table segment and the first address table segment, mapping the physical addresses to logical addresses, wherein the mapping is defined by the first protection table segment and the first address table segment.