Ensuring deadlock free operation for peer to peer traffic in an input/output memory management unit (IOMMU)

Ensuring deadlock free operation for peer to peer traffic in an input/output memory management unit (IOMMU)

In one embodiment, an input/output memory management unit (IOMMU) comprises a cache to cache translation data from memory; and a control unit coupled to the cache. The control unit is configured to implement address translation and memory protection for memory requests sourced by one or more input/o...

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Bibliographische Detailangaben
Hauptverfasser: Hummel, Mark D, Haertel, Michael J, Lueck, Andrew W, Alsup, Mitchell, Hughes, William Alexander, Strongin, Geoffrey S
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:In one embodiment, an input/output memory management unit (IOMMU) comprises a cache to cache translation data from memory; and a control unit coupled to the cache. The control unit is configured to implement address translation and memory protection for memory requests sourced by one or more input/output (I/O) devices. The memory requests sourced by the I/O devices travel in one or more first virtual channels, and the control unit is configured to transmit memory requests sourced by the control unit in at least a second virtual channel separate from the first virtual channels.