Re: [PATCH v2 4/6] VT-d: restrict iommu_flush_all() to cache writeback

[Roger Pau Monné <roger.pau@xxxxxxxxxx>]

On Wed, May 03, 2023 at 11:46:11AM +0200, Jan Beulich wrote:
> We don't need to invalidate caches here; all we're after is that earlier
> writes have made it to main memory (and aiui even that just in case).
> 
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

Reviewed-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>

I wouldn't mind if you gated the flush to iommu_non_coherent, but
that's not very relevant if we plan to remove the call anyway.

Thanks, Roger.