X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=Documentation%2FIntel-IOMMU.txt;h=c2321903aa09adea7f64c00d300814cc32229d1f;hb=1c7c2cdec3a6b2873439096983794a550d7ff65b;hp=aba7722c2935a575bc661985d0978e03ec2685a7;hpb=3460a6d9cef9ac2aa997da7eff7ff1c8291b361c;p=linux-2.6

diff --git a/Documentation/Intel-IOMMU.txt b/Documentation/Intel-IOMMU.txt
index aba7722c29..c2321903aa 100644
--- a/Documentation/Intel-IOMMU.txt
+++ b/Documentation/Intel-IOMMU.txt
@@ -57,6 +57,11 @@ Graphics Problems?
 If you encounter issues with graphics devices, you can try adding
 option intel_iommu=igfx_off to turn off the integrated graphics engine.
 
+If it happens to be a PCI device included in the INCLUDE_ALL Engine,
+then try enabling CONFIG_DMAR_GFX_WA to setup a 1-1 map. We hear
+graphics drivers may be in process of using DMA api's in the near
+future and at that time this option can be yanked out.
+
 Some exceptions to IOVA
 -----------------------
 Interrupt ranges are not address translated, (0xfee00000 - 0xfeefffff).