diff options
Diffstat (limited to 'arch/x86/Kconfig')
| -rw-r--r-- | arch/x86/Kconfig | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 8aae462f4e0..b120cffae1e 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -554,7 +554,15 @@ config AMD_IOMMU select SWIOTLB depends on X86_64 && PCI && ACPI help - Select this to get support for AMD IOMMU hardware in your system. + With this option you can enable support for AMD IOMMU hardware in + your system. An IOMMU is a hardware component which provides + remapping of DMA memory accesses from devices. With an AMD IOMMU you + can isolate the the DMA memory of different devices and protect the + system from misbehaving device drivers or hardware. + + You can find out if your system has an AMD IOMMU if you look into + your BIOS for an option to enable it or if you have an IVRS ACPI + table. # need this always selected by IOMMU for the VIA workaround config SWIOTLB |