1 # SPDX-License-Identifier: GPL-2.0-only
4 bool "AMD IOMMU support"
13 select IOMMU_IO_PGTABLE
14 depends on X86_64 && PCI && ACPI && HAVE_CMPXCHG_DOUBLE
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.
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
27 tristate "AMD IOMMU Version 2 driver"
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.
35 config AMD_IOMMU_DEBUGFS
36 bool "Enable AMD IOMMU internals in DebugFS"
37 depends on AMD_IOMMU && IOMMU_DEBUGFS
39 !!!WARNING!!! !!!WARNING!!! !!!WARNING!!! !!!WARNING!!!
41 DO NOT ENABLE THIS OPTION UNLESS YOU REALLY, -REALLY- KNOW WHAT YOU ARE DOING!!!
42 Exposes AMD IOMMU device internals in DebugFS.
44 This option is -NOT- intended for production environments, and should
45 not generally be enabled.