LXR linux/drivers/iommu/amd/Kconfig

   1# SPDX-License-Identifier: GPL-2.0-only
   2# AMD IOMMU support
   3config AMD_IOMMU
   4        bool "AMD IOMMU support"
   5        select SWIOTLB
   6        select PCI_MSI
   7        select PCI_ATS
   8        select PCI_PRI
   9        select PCI_PASID
  10        select IOMMU_API
  11        select IOMMU_IOVA
  12        select IOMMU_DMA
  13        select IOMMU_IO_PGTABLE
  14        depends on X86_64 && PCI && ACPI && HAVE_CMPXCHG_DOUBLE
  15        help
  16          With this option you can enable support for AMD IOMMU hardware in
  17          your system. An IOMMU is a hardware component which provides
  18          remapping of DMA memory accesses from devices. With an AMD IOMMU you
  19          can isolate the DMA memory of different devices and protect the
  20          system from misbehaving device drivers or hardware.
  21
  22          You can find out if your system has an AMD IOMMU if you look into
  23          your BIOS for an option to enable it or if you have an IVRS ACPI
  24          table.
  25
  26config AMD_IOMMU_V2
  27        tristate "AMD IOMMU Version 2 driver"
  28        depends on AMD_IOMMU
  29        select MMU_NOTIFIER
  30        help
  31          This option enables support for the AMD IOMMUv2 features of the IOMMU
  32          hardware. Select this option if you want to use devices that support
  33          the PCI PRI and PASID interface.
  34
  35config AMD_IOMMU_DEBUGFS
  36        bool "Enable AMD IOMMU internals in DebugFS"
  37        depends on AMD_IOMMU && IOMMU_DEBUGFS
  38        help
  39          !!!WARNING!!!  !!!WARNING!!!  !!!WARNING!!!  !!!WARNING!!!
  40
  41          DO NOT ENABLE THIS OPTION UNLESS YOU REALLY, -REALLY- KNOW WHAT YOU ARE DOING!!!
  42          Exposes AMD IOMMU device internals in DebugFS.
  43
  44          This option is -NOT- intended for production environments, and should
  45          not generally be enabled.
  46