1# SPDX-License-Identifier: GPL-2.0-only 2config VFIO_IOMMU_TYPE1 3 tristate 4 depends on VFIO 5 default n 6 7config VFIO_IOMMU_SPAPR_TCE 8 tristate 9 depends on VFIO && SPAPR_TCE_IOMMU 10 default VFIO 11 12config VFIO_SPAPR_EEH 13 tristate 14 depends on EEH && VFIO_IOMMU_SPAPR_TCE 15 default VFIO 16 17config VFIO_VIRQFD 18 tristate 19 depends on VFIO 20 select EVENTFD 21 default n 22 23menuconfig VFIO 24 tristate "VFIO Non-Privileged userspace driver framework" 25 select IOMMU_API 26 select VFIO_IOMMU_TYPE1 if MMU && (X86 || S390 || ARM || ARM64) 27 help 28 VFIO provides a framework for secure userspace device drivers. 29 See Documentation/driver-api/vfio.rst for more details. 30 31 If you don't know what to do here, say N. 32 33config VFIO_NOIOMMU 34 bool "VFIO No-IOMMU support" 35 depends on VFIO 36 help 37 VFIO is built on the ability to isolate devices using the IOMMU. 38 Only with an IOMMU can userspace access to DMA capable devices be 39 considered secure. VFIO No-IOMMU mode enables IOMMU groups for 40 devices without IOMMU backing for the purpose of re-using the VFIO 41 infrastructure in a non-secure mode. Use of this mode will result 42 in an unsupportable kernel and will therefore taint the kernel. 43 Device assignment to virtual machines is also not possible with 44 this mode since there is no IOMMU to provide DMA translation. 45 46 If you don't know what to do here, say N. 47 48source "drivers/vfio/pci/Kconfig" 49source "drivers/vfio/platform/Kconfig" 50source "drivers/vfio/mdev/Kconfig" 51source "drivers/vfio/fsl-mc/Kconfig" 52source "virt/lib/Kconfig" 53