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_GROUP if SPAPR_TCE_IOMMU || IOMMUFD=n
  8	select VFIO_DEVICE_CDEV if !VFIO_GROUP
  9	select VFIO_CONTAINER if IOMMUFD=n
 10	help
 11	  VFIO provides a framework for secure userspace device drivers.
 12	  See Documentation/driver-api/vfio.rst for more details.
 13
 14	  If you don't know what to do here, say N.
 15
 16if VFIO
 17config VFIO_DEVICE_CDEV
 18	bool "Support for the VFIO cdev /dev/vfio/devices/vfioX"
 19	depends on IOMMUFD && !SPAPR_TCE_IOMMU
 20	default !VFIO_GROUP
 21	help
 22	  The VFIO device cdev is another way for userspace to get device
 23	  access. Userspace gets device fd by opening device cdev under
 24	  /dev/vfio/devices/vfioX, and then bind the device fd with an iommufd
 25	  to set up secure DMA context for device access.  This interface does
 26	  not support noiommu.
 27
 28	  If you don't know what to do here, say N.
 29
 30config VFIO_GROUP
 31	bool "Support for the VFIO group /dev/vfio/$group_id"
 32	default y
 33	help
 34	   VFIO group support provides the traditional model for accessing
 35	   devices through VFIO and is used by the majority of userspace
 36	   applications and drivers making use of VFIO.
 37
 38	   If you don't know what to do here, say Y.
 39
 40config VFIO_CONTAINER
 41	bool "Support for the VFIO container /dev/vfio/vfio"
 42	select VFIO_IOMMU_TYPE1 if MMU && (X86 || S390 || ARM || ARM64)
 43	depends on VFIO_GROUP
 44	default y
 45	help
 46	  The VFIO container is the classic interface to VFIO for establishing
 47	  IOMMU mappings. If N is selected here then IOMMUFD must be used to
 48	  manage the mappings.
 49
 50	  Unless testing IOMMUFD say Y here.
 51
 52if VFIO_CONTAINER
 53config VFIO_IOMMU_TYPE1
 54	tristate
 
 55	default n
 56
 57config VFIO_IOMMU_SPAPR_TCE
 58	tristate
 59	depends on SPAPR_TCE_IOMMU
 
 
 
 
 
 60	default VFIO
 61endif
 62
 63config VFIO_NOIOMMU
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 64	bool "VFIO No-IOMMU support"
 65	depends on VFIO_GROUP
 66	help
 67	  VFIO is built on the ability to isolate devices using the IOMMU.
 68	  Only with an IOMMU can userspace access to DMA capable devices be
 69	  considered secure.  VFIO No-IOMMU mode enables IOMMU groups for
 70	  devices without IOMMU backing for the purpose of re-using the VFIO
 71	  infrastructure in a non-secure mode.  Use of this mode will result
 72	  in an unsupportable kernel and will therefore taint the kernel.
 73	  Device assignment to virtual machines is also not possible with
 74	  this mode since there is no IOMMU to provide DMA translation.
 75
 76	  If you don't know what to do here, say N.
 77
 78config VFIO_VIRQFD
 79	bool
 80	select EVENTFD
 81	default n
 82
 83config VFIO_DEBUGFS
 84	bool "Export VFIO internals in DebugFS"
 85	depends on DEBUG_FS
 86	help
 87	  Allows exposure of VFIO device internals. This option enables
 88	  the use of debugfs by VFIO drivers as required. The device can
 89	  cause the VFIO code create a top-level debug/vfio directory
 90	  during initialization, and then populate a subdirectory with
 91	  entries as required.
 92
 93source "drivers/vfio/pci/Kconfig"
 94source "drivers/vfio/platform/Kconfig"
 95source "drivers/vfio/mdev/Kconfig"
 96source "drivers/vfio/fsl-mc/Kconfig"
 97source "drivers/vfio/cdx/Kconfig"
 98endif
 99
100source "virt/lib/Kconfig"

 1# SPDX-License-Identifier: GPL-2.0-only
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 2config VFIO_IOMMU_TYPE1
 3	tristate
 4	depends on VFIO
 5	default n
 6
 7config VFIO_IOMMU_SPAPR_TCE
 8	tristate
 9	depends on VFIO && SPAPR_TCE_IOMMU
10	default VFIO
11
12config VFIO_SPAPR_EEH
13	tristate
14	depends on EEH && VFIO_IOMMU_SPAPR_TCE
15	default VFIO
 
16
17config VFIO_VIRQFD
18	tristate
19	depends on VFIO && EVENTFD
20	default n
21
22menuconfig VFIO
23	tristate "VFIO Non-Privileged userspace driver framework"
24	depends on IOMMU_API
25	select VFIO_IOMMU_TYPE1 if (X86 || S390 || ARM || ARM64)
26	help
27	  VFIO provides a framework for secure userspace device drivers.
28	  See Documentation/driver-api/vfio.rst for more details.
29
30	  If you don't know what to do here, say N.
31
32menuconfig VFIO_NOIOMMU
33	bool "VFIO No-IOMMU support"
34	depends on VFIO
35	help
36	  VFIO is built on the ability to isolate devices using the IOMMU.
37	  Only with an IOMMU can userspace access to DMA capable devices be
38	  considered secure.  VFIO No-IOMMU mode enables IOMMU groups for
39	  devices without IOMMU backing for the purpose of re-using the VFIO
40	  infrastructure in a non-secure mode.  Use of this mode will result
41	  in an unsupportable kernel and will therefore taint the kernel.
42	  Device assignment to virtual machines is also not possible with
43	  this mode since there is no IOMMU to provide DMA translation.
44
45	  If you don't know what to do here, say N.
46
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
47source "drivers/vfio/pci/Kconfig"
48source "drivers/vfio/platform/Kconfig"
49source "drivers/vfio/mdev/Kconfig"
 
 
 
 
50source "virt/lib/Kconfig"