1 files changed, 15 insertions, 0 deletions

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 5d2858119930..7dc46ba26fbf 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -533,6 +533,21 @@ config CALGARY_IOMMU_ENABLED_BY_DEFAULT
           Calgary anyway, pass 'iommu=calgary' on the kernel command line.
           If unsure, say Y.
 
+config AMD_IOMMU
+        bool "AMD IOMMU support"
+        select SWIOTLB
+        depends on X86_64 && PCI && ACPI
+        help
+          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
         bool