Handling the migration of pages of memory accessible by input-output devices

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United States of America Patent

PATENT NO 11567666
APP PUB NO 20220308755A1
SERIAL NO

17211036

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Importance

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Abstract

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An electronic device includes a memory, a processor that executes a software entity, a page migration engine (PME), and an input-output memory management unit (IOMMU). The software entity and the PME perform operations for preparing to migrate a page of memory that is accessible by at least one IO device in the memory, the software entity and the PME set migration state information in a page table entry for the page of memory and information in reverse map table (RMT) entries involved with migrating the page of memory based on the operations being performed. The IOMMU controls usage of information from the page table entry and controls performance of memory accesses of the page of memory based on the migration state information in the page table entry and information in the RMT entries. When the operations for preparing to migrate the page of memory are completed, the PME migrates the page of memory in the memory.

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Patent Owner(s)

  • ATI TECHNOLOGIES ULC

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ng, Philip Toronto, CA 134 1177
Raval, Nippon Mississauga, CA 9 20

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