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85c94dcffc
This results in less kconfig wordage and a simpler understanding of the required "depends on" to create the menu structure. The next patch increases the nesting level a lot so this is a nice preparatory simplification. Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Yishai Hadas <yishaih@nvidia.com> Link: https://lore.kernel.org/r/20210826103912.128972-13-yishaih@nvidia.com Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
52 lines
1.4 KiB
Text
52 lines
1.4 KiB
Text
# SPDX-License-Identifier: GPL-2.0-only
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menuconfig VFIO
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tristate "VFIO Non-Privileged userspace driver framework"
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select IOMMU_API
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select VFIO_IOMMU_TYPE1 if MMU && (X86 || S390 || ARM || ARM64)
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help
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VFIO provides a framework for secure userspace device drivers.
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See Documentation/driver-api/vfio.rst for more details.
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If you don't know what to do here, say N.
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if VFIO
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config VFIO_IOMMU_TYPE1
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tristate
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default n
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config VFIO_IOMMU_SPAPR_TCE
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tristate
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depends on SPAPR_TCE_IOMMU
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default VFIO
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config VFIO_SPAPR_EEH
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tristate
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depends on EEH && VFIO_IOMMU_SPAPR_TCE
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default VFIO
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config VFIO_VIRQFD
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tristate
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select EVENTFD
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default n
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config VFIO_NOIOMMU
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bool "VFIO No-IOMMU support"
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help
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VFIO is built on the ability to isolate devices using the IOMMU.
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Only with an IOMMU can userspace access to DMA capable devices be
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considered secure. VFIO No-IOMMU mode enables IOMMU groups for
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devices without IOMMU backing for the purpose of re-using the VFIO
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infrastructure in a non-secure mode. Use of this mode will result
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in an unsupportable kernel and will therefore taint the kernel.
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Device assignment to virtual machines is also not possible with
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this mode since there is no IOMMU to provide DMA translation.
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If you don't know what to do here, say N.
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source "drivers/vfio/pci/Kconfig"
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source "drivers/vfio/platform/Kconfig"
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source "drivers/vfio/mdev/Kconfig"
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source "drivers/vfio/fsl-mc/Kconfig"
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endif
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source "virt/lib/Kconfig"
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