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vfio: Depend on MMU
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commit b2b12db upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Jason Gunthorpe authored and Greg Kroah-Hartman committed May 7, 2021
1 parent 4348d3b commit 94c7605
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2 changes: 1 addition & 1 deletion drivers/vfio/Kconfig
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Original file line number Diff line number Diff line change
Expand Up @@ -22,7 +22,7 @@ config VFIO_VIRQFD
menuconfig VFIO
tristate "VFIO Non-Privileged userspace driver framework"
select IOMMU_API
select VFIO_IOMMU_TYPE1 if (X86 || S390 || ARM || ARM64)
select VFIO_IOMMU_TYPE1 if MMU && (X86 || S390 || ARM || ARM64)
help
VFIO provides a framework for secure userspace device drivers.
See Documentation/driver-api/vfio.rst for more details.
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