1# SPDX-License-Identifier: GPL-2.0-only 2menuconfig VFIO 3 tristate "VFIO Non-Privileged userspace driver framework" 4 select IOMMU_API 5 select VFIO_IOMMU_TYPE1 if MMU && (X86 || S390 || ARM || ARM64) 6 select INTERVAL_TREE 7 help 8 VFIO provides a framework for secure userspace device drivers. 9 See Documentation/driver-api/vfio.rst for more details. 10 11 If you don't know what to do here, say N. 12 13if VFIO 14config VFIO_IOMMU_TYPE1 15 tristate 16 default n 17 18config VFIO_IOMMU_SPAPR_TCE 19 tristate 20 depends on SPAPR_TCE_IOMMU 21 default VFIO 22 23config VFIO_VIRQFD 24 bool 25 select EVENTFD 26 default n 27 28config VFIO_NOIOMMU 29 bool "VFIO No-IOMMU support" 30 help 31 VFIO is built on the ability to isolate devices using the IOMMU. 32 Only with an IOMMU can userspace access to DMA capable devices be 33 considered secure. VFIO No-IOMMU mode enables IOMMU groups for 34 devices without IOMMU backing for the purpose of re-using the VFIO 35 infrastructure in a non-secure mode. Use of this mode will result 36 in an unsupportable kernel and will therefore taint the kernel. 37 Device assignment to virtual machines is also not possible with 38 this mode since there is no IOMMU to provide DMA translation. 39 40 If you don't know what to do here, say N. 41 42source "drivers/vfio/pci/Kconfig" 43source "drivers/vfio/platform/Kconfig" 44source "drivers/vfio/mdev/Kconfig" 45source "drivers/vfio/fsl-mc/Kconfig" 46endif 47 48source "virt/lib/Kconfig" 49