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The Price of Safety: Evaluating IOMMU Performance

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memory components

Overview IOMMUs, IO Memory Management Units, are hardware devices that translate device DMA addresses to machine addresses. An isolation capable IOMMU restricts a device so that it can only access parts of memory it has been explicitly granted access to. Isolation capable IOMMUs perform a valuable system service by preventing rogue devices from performing errant or malicious DMAs, thereby substantially increasing the system's reliability and availability. Without an IOMMU a peripheral device could be programmed to overwrite any part of the system's memory. Operating systems utilize IOMMUs to isolate device drivers; hypervisors utilize IOMMUs to grant secure direct hardware access to virtual machines.

Further White Paper Details
Publisher	IBM	File Format	PDF
Date Published	June 2007
Format	White Papers
Topics	Memory Components

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The Price of Safety: Evaluating IOMMU Performance

Publisher:
IBM

Tags:
memory components

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