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:

quoted

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