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Intel Whitepaper updated: Using IOMMU for DMA Protection in UEFI Firmware

We recommend firmware developers review this docment to understand threats from unauthorized internal DMA, as well as DMA from non-PCI devices that platform firmware may configure. Using an IOMMU such as Intel VT-d allows fine-grain control of memory protection without broadly disabling bus-mastering capabilities in the pre-boot space.

Note: this whitepaper was originally published under the title “A Tour beyond BIOS Using Intel® VT-d for DMA Protection in UEFI BIOS” in January 2015.

https://firmware.intel.com/blog/updated-whitepaper-using-iommu-dma-protection-uefi-firmware

https://firmware.intel.com/sites/default/files/Intel_WhitePaper_Using_IOMMU_for_DMA_Protection_in_UEFI.pdf

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