diff options
Diffstat (limited to 'drivers/iommu/iommufd/Kconfig')
| -rw-r--r-- | drivers/iommu/iommufd/Kconfig | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/drivers/iommu/iommufd/Kconfig b/drivers/iommu/iommufd/Kconfig new file mode 100644 index 000000000000..8306616b6d81 --- /dev/null +++ b/drivers/iommu/iommufd/Kconfig @@ -0,0 +1,44 @@ +# 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 && !VFIO_CONTAINER + default VFIO && !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 no-IOMMU support, 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 |