On Tue, Jun 08, 2021 at 04:38:48PM +0200, Thierry Reding wrote:

On Tue, Jun 08, 2021 at 01:01:29PM +0100, Will Deacon wrote:

quoted

On Mon, Jun 07, 2021 at 10:49:10AM +0200, Krzysztof Kozlowski wrote:

quoted

This is the pull for you to base further SMMU aptches (prevent early SMMU
faults).

This is a tonne of code for me to pull into the SMMU tree given that I only
want one patch!

Thierry, if I just stick:

https://lore.kernel.org/r/20210603164632.1000458-4-thierry.reding@gmail.com (local)

on its own branch, can you stitch together whatever you need?

I'm not sure I understand what you're proposing. For reference, here's
the set of patches that I sent out:

  1. memory: tegra: Implement SID override programming
  2. dt-bindings: arm-smmu: Add Tegra186 compatible string
  3. iommu/arm-smmu: Implement ->probe_finalize()
  4. iommu/arm-smmu: tegra: Detect number of instances at runtime
  5. iommu/arm-smmu: tegra: Implement SID override programming
  6. iommu/arm-smmu: Use Tegra implementation on Tegra186
  7. arm64: tegra: Use correct compatible string for Tegra186 SMMU
  8. arm64: tegra: Hook up memory controller to SMMU on Tegra186
  9. arm64: tegra: Enable SMMU support on Tegra194

Krzysztof already picked up patch 1 and I was assuming that you'd pick
up 2-6 because they are to the ARM SMMU driver. However, if you're
primarily interested in just patch 3, which is more "core" ARM SMMU than
the rest, which are Tegra-specific, then I suppose what we could do is
for you to give an Acked-by on the rest (2, 4-6) and then Krzysztof or I
can pick them up and take them via ARM SoC, based on the stable branch
from your tree that only has patch 3.

I think you previously said that patch 5 depends on patch 1, so I can't
take 2-6 without also pulling in the memory controller queue.

Patch 6 touches arm-smmu-impl.c, though it's a two-line change that
touches only the Tegra-specific matching bit in arm_smmu_impl_init(), so
the likelihood of that conflicting with anything else is fairly small.

Is that what you were proposing?

I can queue as much or as little of 2-6 as you like, but I would like to
avoid pulling in the memory controller queue into the arm smmu tree. But
yes, whichever of those I take, I can put them on a separate branch so
that you're not blocked for the later patches.

You have a better handle on the dependencies, so please tell me what works
for you. I just want to make sure that at least patch 3 lands in my tree,
so we don't get late conflicts with other driver changes.

Will

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