drivers/vfio/Kconfig

   1 # SPDX-License-Identifier: GPL-2.0-only
   2 config VFIO_IOMMU_TYPE1
   3         tristate
   4         depends on VFIO
   5         default n
   6
   7 config VFIO_IOMMU_SPAPR_TCE
   8         tristate
   9         depends on VFIO && SPAPR_TCE_IOMMU
  10         default VFIO
  11
  12 config VFIO_SPAPR_EEH
  13         tristate
  14         depends on EEH && VFIO_IOMMU_SPAPR_TCE
  15         default VFIO
  16
  17 config VFIO_VIRQFD
  18         tristate
  19         depends on VFIO && EVENTFD
  20         default n
  21
  22 menuconfig 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
  32 menuconfig 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
  47 source "drivers/vfio/pci/Kconfig"
  48 source "drivers/vfio/platform/Kconfig"
  49 source "drivers/vfio/mdev/Kconfig"
  50 source "virt/lib/Kconfig"