[PATCH v3 0/9] arm64: tegra: Prevent early SMMU faults

Thierry Reding thierry.reding at gmail.com
Fri Jun 11 05:05:58 PDT 2021


On Fri, Jun 11, 2021 at 08:48:00AM +0200, Krzysztof Kozlowski wrote:
> On Thu, 3 Jun 2021 18:46:23 +0200, Thierry Reding wrote:
> > this is a set of patches that is the result of earlier discussions
> > regarding early identity mappings that are needed to avoid SMMU faults
> > during early boot.
> > 
> > The goal here is to avoid early identity mappings altogether and instead
> > postpone the need for the identity mappings to when devices are attached
> > to the SMMU. This works by making the SMMU driver coordinate with the
> > memory controller driver on when to start enforcing SMMU translations.
> > This makes Tegra behave in a more standard way and pushes the code to
> > deal with the Tegra-specific programming into the NVIDIA SMMU
> > implementation.
> > 
> > [...]
> 
> Applied, thanks!
> 
> [1/9] memory: tegra: Implement SID override programming
>       (no commit info)
> [2/9] dt-bindings: arm-smmu: Add Tegra186 compatible string
>       commit: 4287861dca9d77490ee50de42aa3ada92da86c9d
> 
> [3/9] - skipped
> 
> [4/9] iommu/arm-smmu: tegra: Detect number of instances at runtime
>       commit: 7ecbf253f8d64c08de28d16a66e3abbe873f6c9f
> [5/9] iommu/arm-smmu: tegra: Implement SID override programming
>       commit: 8eb68595475ac5fcaaa3718a173283df48cb4ef1
> [6/9] iommu/arm-smmu: Use Tegra implementation on Tegra186
>       commit: 2c1bc371268862a991a6498e1dddc8971b9076b8

I've applied patches 7-9 to the Tegra tree.

Thanks Krzysztof and Will for your help in getting this over the finish
line!

Thierry
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