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VFIO_IOMMU_TYPE1 does not compile with !MMU: ../drivers/vfio/vfio_iommu_type1.c: In function 'follow_fault_pfn': ../drivers/vfio/vfio_iommu_type1.c:536:22: error: implicit declaration of function 'pte_write'; did you mean 'vfs_write'? [-Werror=implicit-function-declaration] So require it. Suggested-by: Cornelia Huck <cohuck@redhat.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Message-Id: <0-v1-02cb5500df6e+78-vfio_no_mmu_jgg@nvidia.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
52 lines
1.5 KiB
Plaintext
52 lines
1.5 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0-only
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config VFIO_IOMMU_TYPE1
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tristate
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depends on VFIO
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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 VFIO && 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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depends on VFIO && EVENTFD
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default n
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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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menuconfig VFIO_NOIOMMU
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bool "VFIO No-IOMMU support"
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depends on VFIO
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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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source "virt/lib/Kconfig"
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