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CONFIG_IOMMUFD_VFIO_CONTAINER: IOMMUFD provides the VFIO container /dev/vfio/vfio

General informations

The Linux kernel configuration item CONFIG_IOMMUFD_VFIO_CONTAINER:

Help text

IOMMUFD will provide /dev/vfio/vfio instead of VFIO. This relies on IOMMUFD providing compatibility emulation to give the same ioctls. It provides an option to build a kernel with legacy VFIO components removed.

IOMMUFD VFIO container emulation is known to lack certain features of the native VFIO container, such as peer-to-peer DMA mapping, PPC IOMMU support, as well as other potentially undiscovered gaps. This option is currently intended for the purpose of testing IOMMUFD with unmodified userspace supporting VFIO and making use of the Type1 VFIO IOMMU backend. General purpose enabling of this option is currently discouraged.

Unless testing IOMMUFD, say N here.



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