x86: move GART TLB flushing options to generic code

The GART currently implements the iommu=[no]fullflush command line
parameters which influence its IO/TLB flushing strategy. This patch
makes these parameters generic so that they can be used by the AMD IOMMU
too.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

2 files changed, 4 insertions, 2 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 1150444a21ab..40066ceb48fe 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -893,6 +893,10 @@ and is between 256 and 4096 characters. It is defined in the file
                 nomerge
                 forcesac
                 soft
+                fullflush
+                        Flush IO/TLB at every deallocation
+                nofullflush
+                        Flush IO/TLB only when addresses are reused (default)
 
 
         intel_iommu=    [DMAR] Intel IOMMU driver (DMAR) option
diff --git a/Documentation/x86/x86_64/boot-options.txt b/Documentation/x86/x86_64/boot-options.txt
index b0c7b6c4abda..c83c8e4bc8e5 100644
--- a/Documentation/x86/x86_64/boot-options.txt
+++ b/Documentation/x86/x86_64/boot-options.txt
@@ -233,8 +233,6 @@ IOMMU (input/output memory management unit)
   iommu options only relevant to the AMD GART hardware IOMMU:
     <size>             Set the size of the remapping area in bytes.
     allowed            Overwrite iommu off workarounds for specific chipsets.
-    fullflush          Flush IOMMU on each allocation (default).
-    nofullflush        Don't use IOMMU fullflush.
     leak               Turn on simple iommu leak tracing (only when
                        CONFIG_IOMMU_LEAK is on). Default number of leak pages
                        is 20.