1 files changed, 15 insertions, 4 deletions

diff --git a/arch/x86_64/Kconfig b/arch/x86_64/Kconfig
index 5c9aaed589a..5cf94177434 100644
--- a/arch/x86_64/Kconfig
+++ b/arch/x86_64/Kconfig
@@ -755,11 +755,22 @@ config DMAR
         depends on PCI_MSI && ACPI && EXPERIMENTAL
         default y
         help
-          DMA remapping(DMAR) devices support enables independent address
-          translations for Direct Memory Access(DMA) from Devices.
+          DMA remapping (DMAR) devices support enables independent address
+          translations for Direct Memory Access (DMA) from devices.
           These DMA remapping devices are reported via ACPI tables
-          and includes pci device scope covered by these DMA
-          remapping device.
+          and include PCI device scope covered by these DMA
+          remapping devices.
+
+config DMAR_GFX_WA
+        bool "Support for Graphics workaround"
+        depends on DMAR
+        default y
+        help
+         Current Graphics drivers tend to use physical address
+         for DMA and avoid using DMA APIs. Setting this config
+         option permits the IOMMU driver to set a unity map for
+         all the OS-visible memory. Hence the driver can continue
+         to use physical addresses for DMA.
 
 source "drivers/pci/pcie/Kconfig"