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CONFIG_DMAR_GFX_WA: Support for Graphics workaround

General informations

The Linux kernel configuration item CONFIG_DMAR_GFX_WA:

Help text

Current Graphics drivers tend to use physical address for DMA and avoid using DMA APIs. Setting this config option permits the IOMMU driver to set a unity map for all the OS-visible memory. Hence the driver can continue to use physical addresses for DMA.



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