[PATCH] iommu/arm-smmu: Add a init_context_bank implementation hook

[Will Deacon]

On Thu, Jun 11, 2020 at 04:36:56PM -0600, Jordan Crouse wrote:
> Add a new implementation hook to allow the implementation specific code
> to tweek the context bank configuration just before it gets written.
> The first user will be the Adreno GPU implementation to turn on
> SCTLR.HUPCF to ensure that a page fault doesn't terminating pending
> transactions. Doing so could hang the GPU if one of the terminated
> transactions is a CP read.
> 
> This depends on the arm-smmu adreno SMMU implementation [1].
> 
> [1] https://patchwork.kernel.org/patch/11600943/
> 
> Signed-off-by: Jordan Crouse <jcrouse at codeaurora.org>
> ---
> 
>  drivers/iommu/arm-smmu-qcom.c | 13 +++++++++++++
>  drivers/iommu/arm-smmu.c      | 28 +++++++++++++---------------
>  drivers/iommu/arm-smmu.h      | 11 +++++++++++
>  3 files changed, 37 insertions(+), 15 deletions(-)

This looks straightforward enough, but I don't want to merge this without
a user and Sai's series has open questions afaict.

Will