SNOOP FILTERING

Abstract: an apparatus comprises request receiving circuitry to receive a given memory system request specifying a target address in a given physical address space and a target memory encryption context identifier (mecid) indicative of a selected memory encryption context associated with the memory system request. snoop filtering circuitry determines whether a snoop request is to be transmitted to a given caching agent in response to the given memory system request. the snoop filtering circuitry determines, based on the target mecid of the given memory system request and on snoop filtering information associated with the given caching agent, whether the target mecid is a snoop-not-required mecid for the given caching agent. in response to determining that the target mecid is a snoop-not-required mecid for the given caching agent, the snoop filtering circuitry suppresses transmission of a snoop request to the given caching agent in response to the given memory system request.

Inventor(s): Yuval Elad, Jason Parker, Alexander Donald Charles Chadwick

CPC Classification: G06F21/6218 ({to a system of files or objects, e.g. local or distributed file system or database})

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