[PATCH v3 2/2] iommu/arm-smmu-v3: Add HAFT support for SVA

[Jason Gunthorpe]

On Mon, Jul 27, 2026 at 01:03:29PM +0100, Robin Murphy wrote:
> Since table access flags cannot be software-managed, if process
> pagetables are using HAFT then SVA must require the SMMU to support and
> enable it too, otherwise page aging is liable to get out of whack.
> 
> For unbinding, we can't disable HAFT atomically with HA as might be
> desired, but luckily we can get away with just not disabling HA either.
> 
> Cc: <stable at vger.kernel.org>
> Fixes: 62df5870ebf7 ("arm64: Enable ARCH_HAS_NONLEAF_PMD_YOUNG")
> Signed-off-by: Robin Murphy <robin.murphy at arm.com>
> ---
> 
> v3: Make all HTTU settings unconditional WRT mm.

Reviewed-by: Jason Gunthorpe <jgg at nvidia.com>

Jason