[PATCH] iommu/arm-smmu-v3: Avoid constructing invalid range commands

[Will Deacon]

On Mon, 11 Sep 2023 12:57:04 +0100, Robin Murphy wrote:
> Although io-pgtable's non-leaf invalidations are always for full tables,
> I missed that SVA also uses non-leaf invalidations, while being at the
> mercy of whatever range the MMU notifier throws at it. This means it
> definitely wants the previous TTL fix as well, since it also doesn't
> know exactly which leaf level(s) may need invalidating, but it can also
> give us less-aligned ranges wherein certain corners may lead to building
> an invalid command where TTL, Num and Scale are all 0. It should be fine
> to handle this by over-invalidating an extra page, since falling back to
> a non-range command opens up a whole can of errata-flavoured worms.
> 
> [...]

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

[1/1] iommu/arm-smmu-v3: Avoid constructing invalid range commands
      https://git.kernel.org/will/c/eb6c97647be2

Cheers,
-- 
Will

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