[PATCH] iommu/arm-smmu: Report IOMMU_CAP_CACHE_COHERENCY even betterer

[Will Deacon]

On Thu, 15 Dec 2022 16:51:55 +0000, Robin Murphy wrote:
> Although it's vanishingly unlikely that anyone would integrate an SMMU
> within a coherent interconnect without also making the pagetable walk
> interface coherent, the same effect happens if a coherent SMMU fails to
> advertise CTTW correctly. This turns out to be the case on some popular
> NXP SoCs, where VFIO started failing the IOMMU_CAP_CACHE_COHERENCY test,
> even though IOMMU_CACHE *was* previously achieving the desired effect
> anyway thanks to the underlying integration.
> 
> [...]

Applied to will (for-joerg/arm-smmu/fixes), thanks!

[1/1] iommu/arm-smmu: Report IOMMU_CAP_CACHE_COHERENCY even betterer
      https://git.kernel.org/will/c/259c2ec3c5f3

Cheers,
-- 
Will

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