Advanced Micro Devices, Inc.
METHOD ENABLING VIRTUAL PAGES TO BE ALLOCATED WITH NONCONTIGUOUS BACKING PHYSICAL SUBPAGES

Abstract:

A device includes an address translation buffer to, for each virtual page number of a plurality of virtual page numbers, store a mapping associated with the virtual page number. The mapping identifies a set of physical subpages allocated for the virtual page number, and the set of physical subpages includes at least a first physical subpage of a plurality of contiguous subpages in a physical memory region and excludes at least a second physical subpage of the plurality of contiguous subpages in the physical memory region. A memory management unit is coupled with the address translation buffer to, in response to receiving a requested virtual subpage number and a requested virtual page number of the plurality of virtual page numbers, determine, based on the mapping associated with the requested virtual page number, a physical subpage number identifying a physical subpage that is allocated for the requested virtual subpage number.