This patch adds descriptions fore new properties of device tree binding for the ARM SMMU architecture. These properties control arm-smmu driver options.
Cc: Rob Herring <robherri...@gmail.com> Cc: Grant Likely <grant.lik...@linaro.org> Cc: Will Deacon <will.dea...@arm.com> Signed-off-by: Andreas Herrmann <andreas.herrm...@calxeda.com> --- .../devicetree/bindings/iommu/arm,smmu.txt | 23 ++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/Documentation/devicetree/bindings/iommu/arm,smmu.txt b/Documentation/devicetree/bindings/iommu/arm,smmu.txt index e34c6cd..6415a88 100644 --- a/Documentation/devicetree/bindings/iommu/arm,smmu.txt +++ b/Documentation/devicetree/bindings/iommu/arm,smmu.txt @@ -48,6 +48,28 @@ conditions. from the mmu-masters towards memory) node for this SMMU. +- arm,smmu-isolate-devices : Enable device isolation for all masters + of this SMMU. Ie. each master will be + attached to its own iommu domain. + +- arm,smmu-mask-stream-ids : Enable mapping of all StreamIDs to one + context for this SMMU. It is only allowed + if there is one single master. It saves + the need to know and specify all + StreamIDs in cases where just one master + is attached to an SMMU. If StreamIDs are + specified in the mmu-masters property + those are ignored. (The referred device + node must still have a "#stream-id-cells" + property. But it can be set to 0.) + +- arm,smmu-secure-config-access : Enable proper handling of buggy + implementations that always use + secure access to SMMU configuration + registers. In this case non-secure + aliases of secure registers have to + be used during SMMU configuration. + Example: smmu { @@ -67,4 +89,5 @@ Example: */ mmu-masters = <&dma0 0xd01d 0xd01e>, <&dma1 0xd11c>; + arm,smmu-isolate-devices; }; -- 1.7.9.5 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu