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