V4L/DVB (4671): Support for SAA7134-based AVerTV Hybrid A16AR

[linux-2.6-omap-h63xx.git] / Documentation / x86_64 / boot-options.txt

diff --git a/Documentation/x86_64/boot-options.txt b/Documentation/x86_64/boot-options.txt
index 6da24e7a56cba01c9b7af0a0e1c894667a614d75..74b77f9e91bc5cc5692eee19fc0b4b6be3a49302 100644 (file)
--- a/Documentation/x86_64/boot-options.txt
+++ b/Documentation/x86_64/boot-options.txt
@@ -199,6 +199,11 @@ IOMMU
    allowed  overwrite iommu off workarounds for specific chipsets.
    soft         Use software bounce buffering (default for Intel machines)
    noaperture Don't touch the aperture for AGP.
+   allowdac Allow DMA >4GB
+           When off all DMA over >4GB is forced through an IOMMU or bounce
+           buffering.
+   nodac    Forbid DMA >4GB
+   panic    Always panic when IOMMU overflows
 
   swiotlb=pages[,force]
 
@@ -245,6 +250,13 @@ Debugging
                newfallback: use new unwinder but fall back to old if it gets
                        stuck (default)
 
+  call_trace=[old|both|newfallback|new]
+               old: use old inexact backtracer
+               new: use new exact dwarf2 unwinder
+               both: print entries from both
+               newfallback: use new unwinder but fall back to old if it gets
+                       stuck (default)
+
 Misc
 
   noreplacement  Don't replace instructions with more appropriate ones