tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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.