Re: [PATCH 6/6] iommu/arm-smmu: add .domain_{set, get}_attr for coherent walk control

2014-08-19 Thread Mitchel Humpherys
On Tue, Aug 19 2014 at 05:48:07 AM, Will Deacon wrote: > On Wed, Aug 13, 2014 at 01:51:39AM +0100, Mitchel Humpherys wrote: >> Under certain conditions coherent hardware translation table walks can >> result in degraded performance. Add a new domain attribute to >> disable/enable this feature in g

Re: [PATCH 6/6] iommu/arm-smmu: add .domain_{set,get}_attr for coherent walk control

2014-08-19 Thread Will Deacon
On Wed, Aug 13, 2014 at 01:51:39AM +0100, Mitchel Humpherys wrote: > 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 gett

[PATCH 6/6] iommu/arm-smmu: add .domain_{set, get}_attr for coherent walk control

2014-08-12 Thread Mitchel Humpherys
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. Signed-off-by: Mitchel Humpherys