Method and system for allowing program operated on logical partitions to access resources

Disclosed are a method of and a system for enabling a program running on a logical partition, of a logically partitioned data processing system, to access directly resources of the data processing system. The method comprises the steps of, said program transforming a first address for a resource of a specific type on the data processing system, to a second address, within an address space allocated to said logical partition; and said program uses said second address space to access a resource of said specific type allocated to said logical partition. In this way, the present invention may be used to enable a program running within a partition's address space to access IO devices directly, thus avoiding the overhead of making a hypervisor call.