Re: [PATCH] iommu/arm-smmu-v3: Invalidate a new level-1 stream table descriptor

[Xuheng Li]

On Tue, Nov 10, 2026 at 02:58:21PM +0000, Mostafa Saleh wrote:
> Which checks out. However, I am curious why this was not seen for
> over 10 years with the current behaviour as I doubt any existing
> implementation will do negative caching. Is that something that was
> observed or found by inspection?

Thanks, Mostafa. Found by inspection against the spec, not observed on
hardware; we don't know whether any current implementation caches an
invalid L1STD. Either way, the driver should follow 5.1.1 as the L1CD
path already does. v2 will take both comment nits and your R-b.

Thanks,
Xuheng