[PATCH V4] iommu/arm-smmu-v2: Workaround for ThunderX errata#27704

[Tirumalesh Chalamarla]

On 03/04/2016 12:59 PM, Will Deacon wrote:
> On Fri, Mar 04, 2016 at 10:39:44AM -0800, Tirumalesh Chalamarla wrote:
>> Due to Errata#27704 CN88xx SMMUv2,supports  only shared ASID and VMID
>> namespaces; specifically within a given node SMMU0 and SMMU1 share,
>> as does SMMU2 and SMMU3.
>>
>> This patch make sure ASID and VMID space is unique across cavium SMMUv2.
>>
>> changes from V3:
>> 	- Removed redundent variable.
>> 	- Used atomic_t for maintaining running total
>>
>> changes from V2:
>> 	- removed *_base from DT, and replaced with compatible string
>>
>> changes from V1:
>> 	- rebased on top of 16 bit VMID patch
>> 	- removed redundent options from DT
>> 	- insted of transform, DT now supplies starting ASID/VMID
>>
>> Signed-off-by: Tirumalesh Chalamarla <tchalamarla at caviumnetworks.com>
>> Signed-off-by: Akula Geethasowjanya <Geethasowjanya.Akula at caviumnetworks.com>
>> ---
>>   Documentation/arm64/silicon-errata.txt             |  1 +
>>   .../devicetree/bindings/iommu/arm,smmu.txt         |  1 +
>>   drivers/iommu/arm-smmu.c                           | 42 ++++++++++++++++------
>>   3 files changed, 33 insertions(+), 11 deletions(-)
>
> Hmm, this doesn't seem to apply to my iommu/devel branch. Am I missing
> some dependency?
>
there should not, i will repost based on that branch.

> Will
>