config VFIO_IOMMU_TYPE1 tristate depends on VFIO default n config VFIO_IOMMU_SPAPR_TCE tristate depends on VFIO && SPAPR_TCE_IOMMU default VFIO config VFIO_SPAPR_EEH tristate depends on EEH && VFIO_IOMMU_SPAPR_TCE default VFIO config VFIO_VIRQFD tristate depends on VFIO && EVENTFD default n menuconfig VFIO tristate "VFIO Non-Privileged userspace driver framework" depends on IOMMU_API select VFIO_IOMMU_TYPE1 if (X86 || S390 || ARM_SMMU || ARM_SMMU_V3) select ANON_INODES help VFIO provides a framework for secure userspace device drivers. See Documentation/vfio.txt for more details. If you don't know what to do here, say N. menuconfig VFIO_NOIOMMU bool "VFIO No-IOMMU support" depends on VFIO help VFIO is built on the ability to isolate devices using the IOMMU. Only with an IOMMU can userspace access to DMA capable devices be considered secure. VFIO No-IOMMU mode enables IOMMU groups for devices without IOMMU backing for the purpose of re-using the VFIO infrastructure in a non-secure mode. Use of this mode will result in an unsupportable kernel and will therefore taint the kernel. Device assignment to virtual machines is also not possible with this mode since there is no IOMMU to provide DMA translation. If you don't know what to do here, say N. source "drivers/vfio/pci/Kconfig" source "drivers/vfio/platform/Kconfig" source "drivers/vfio/mdev/Kconfig" source "virt/lib/Kconfig"