diff options
| author | Mitchel Humpherys <mitchelh@codeaurora.org> | 2014-08-08 15:28:44 -0700 |
|---|---|---|
| committer | David Keitel <dkeitel@codeaurora.org> | 2016-03-22 11:11:08 -0700 |
| commit | 9bbc577a32d600a6e0706699b48315726b58d87e (patch) | |
| tree | d4444175051647593cb13468ca3f990e872afb2f /include/linux | |
| parent | e400e3338906fd38e408d44f0d20e18d3b715f2c (diff) | |
iommu/arm-smmu: add .domain_{set,get}_attr for coherent walk control
Under certain conditions coherent hardware translation table walks can
result in degraded performance. Add a new domain attribute to
disable/enable this feature in generic code along with the domain
attribute setter and getter to handle it in the ARM SMMU driver.
Change-Id: Ic9812d5047af19093ec2db8246a7f0f9ccb626ab
Signed-off-by: Mitchel Humpherys <mitchelh@codeaurora.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/iommu.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/iommu.h b/include/linux/iommu.h index e6a7c9ff72f2..54ea8444cf19 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -84,6 +84,7 @@ enum iommu_attr { DOMAIN_ATTR_FSL_PAMU_ENABLE, DOMAIN_ATTR_FSL_PAMUV1, DOMAIN_ATTR_NESTING, /* two stages of translation */ + DOMAIN_ATTR_COHERENT_HTW_DISABLE, DOMAIN_ATTR_MAX, }; |