50 lines
1.6 KiB
Plaintext
50 lines
1.6 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0-only
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config IOMMUFD_DRIVER_CORE
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tristate
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default (IOMMUFD_DRIVER || IOMMUFD) if IOMMUFD!=n
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config IOMMUFD
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tristate "IOMMU Userspace API"
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select INTERVAL_TREE
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select INTERVAL_TREE_SPAN_ITER
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select IOMMU_API
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default n
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help
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Provides /dev/iommu, the user API to control the IOMMU subsystem as
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it relates to managing IO page tables that point at user space memory.
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If you don't know what to do here, say N.
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if IOMMUFD
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config IOMMUFD_VFIO_CONTAINER
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bool "IOMMUFD provides the VFIO container /dev/vfio/vfio"
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depends on VFIO_GROUP && !VFIO_CONTAINER
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default VFIO_GROUP && !VFIO_CONTAINER
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help
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IOMMUFD will provide /dev/vfio/vfio instead of VFIO. This relies on
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IOMMUFD providing compatibility emulation to give the same ioctls.
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It provides an option to build a kernel with legacy VFIO components
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removed.
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IOMMUFD VFIO container emulation is known to lack certain features
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of the native VFIO container, such as peer-to-peer
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DMA mapping, PPC IOMMU support, as well as other potentially
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undiscovered gaps. This option is currently intended for the
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purpose of testing IOMMUFD with unmodified userspace supporting VFIO
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and making use of the Type1 VFIO IOMMU backend. General purpose
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enabling of this option is currently discouraged.
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Unless testing IOMMUFD, say N here.
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config IOMMUFD_TEST
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bool "IOMMU Userspace API Test support"
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depends on DEBUG_KERNEL
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depends on FAULT_INJECTION
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depends on RUNTIME_TESTING_MENU
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select IOMMUFD_DRIVER
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default n
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help
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This is dangerous, do not enable unless running
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tools/testing/selftests/iommu
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endif
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