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 MMU_NOTIFIER
11	select IOMMU_API
12	select IOMMU_IOVA
13	select IOMMU_IO_PGTABLE
14	select IOMMU_SVA
15	select IOMMU_IOPF
16	select IOMMUFD_DRIVER if IOMMUFD
17	depends on X86_64 && PCI && ACPI && HAVE_CMPXCHG_DOUBLE
18	help
19	  With this option you can enable support for AMD IOMMU hardware in
20	  your system. An IOMMU is a hardware component which provides
21	  remapping of DMA memory accesses from devices. With an AMD IOMMU you
22	  can isolate the DMA memory of different devices and protect the
23	  system from misbehaving device drivers or hardware.
24
25	  You can find out if your system has an AMD IOMMU if you look into
26	  your BIOS for an option to enable it or if you have an IVRS ACPI
27	  table.
28
29config AMD_IOMMU_DEBUGFS
30	bool "Enable AMD IOMMU internals in DebugFS"
31	depends on AMD_IOMMU && IOMMU_DEBUGFS
32	help
33	  !!!WARNING!!!  !!!WARNING!!!  !!!WARNING!!!  !!!WARNING!!!
34
35	  DO NOT ENABLE THIS OPTION UNLESS YOU REALLY, -REALLY- KNOW WHAT YOU ARE DOING!!!
36	  Exposes AMD IOMMU device internals in DebugFS.
37
38	  This option is -NOT- intended for production environments, and should
39	  not generally be enabled.
40