1 # SPDX-License-Identifier: GPL-2.0-only
4 bool "AMD IOMMU support"
12 select IOMMU_IO_PGTABLE
13 select IOMMUFD_DRIVER if IOMMUFD
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
26 config AMD_IOMMU_DEBUGFS
27 bool "Enable AMD IOMMU internals in DebugFS"
28 depends on AMD_IOMMU && IOMMU_DEBUGFS
30 !!!WARNING!!! !!!WARNING!!! !!!WARNING!!! !!!WARNING!!!
32 DO NOT ENABLE THIS OPTION UNLESS YOU REALLY, -REALLY- KNOW WHAT YOU ARE DOING!!!
33 Exposes AMD IOMMU device internals in DebugFS.
35 This option is -NOT- intended for production environments, and should
36 not generally be enabled.