drivers/vfio/Kconfig

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