Advanced Micro Devices, Inc.
Security key identifier remapping

Abstract:

Security key identifier remapping includes associating a system-level security key identifier to a local-level identifier requiring fewer bits of storage space. The remapped security key identifiers are used to receive, at a first compute complex of a processing system, a memory access request including a memory address value and a system-level security key identifier. The compute complex responds to the memory access request based on a determination of whether a security key identifier map of the first compute complex includes a mapping of the system-level security key identifier to a local-level security key identifier. In response to determining that the security key identifier map of the first compute complex does not include a mapping of the system-level security key identifier to the local-level security key identifier, a cache miss message may be returned without probing caches of the first compute complex.