Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1# SPDX-License-Identifier: GPL-2.0-only
2menuconfig VFIO
3 tristate "VFIO Non-Privileged userspace driver framework"
4 select IOMMU_API
5 depends on IOMMUFD || !IOMMUFD
6 select INTERVAL_TREE
7 select VFIO_CONTAINER if IOMMUFD=n
8 help
9 VFIO provides a framework for secure userspace device drivers.
10 See Documentation/driver-api/vfio.rst for more details.
11
12 If you don't know what to do here, say N.
13
14if VFIO
15config VFIO_CONTAINER
16 bool "Support for the VFIO container /dev/vfio/vfio"
17 select VFIO_IOMMU_TYPE1 if MMU && (X86 || S390 || ARM || ARM64)
18 default y
19 help
20 The VFIO container is the classic interface to VFIO for establishing
21 IOMMU mappings. If N is selected here then IOMMUFD must be used to
22 manage the mappings.
23
24 Unless testing IOMMUFD say Y here.
25
26if VFIO_CONTAINER
27config VFIO_IOMMU_TYPE1
28 tristate
29 default n
30
31config VFIO_IOMMU_SPAPR_TCE
32 tristate
33 depends on SPAPR_TCE_IOMMU
34 default VFIO
35
36config VFIO_NOIOMMU
37 bool "VFIO No-IOMMU support"
38 help
39 VFIO is built on the ability to isolate devices using the IOMMU.
40 Only with an IOMMU can userspace access to DMA capable devices be
41 considered secure. VFIO No-IOMMU mode enables IOMMU groups for
42 devices without IOMMU backing for the purpose of re-using the VFIO
43 infrastructure in a non-secure mode. Use of this mode will result
44 in an unsupportable kernel and will therefore taint the kernel.
45 Device assignment to virtual machines is also not possible with
46 this mode since there is no IOMMU to provide DMA translation.
47
48 If you don't know what to do here, say N.
49endif
50
51config VFIO_VIRQFD
52 bool
53 select EVENTFD
54 default n
55
56source "drivers/vfio/pci/Kconfig"
57source "drivers/vfio/platform/Kconfig"
58source "drivers/vfio/mdev/Kconfig"
59source "drivers/vfio/fsl-mc/Kconfig"
60endif
61
62source "virt/lib/Kconfig"