[PATCH v2 5/8] iommu/arm-smmu-v3: Skip cd sync if CD table isn't active

[Jason Gunthorpe]

On Mon, Jul 31, 2023 at 06:48:15PM +0800, Michael Shavit wrote:
> This commit explicitly keeps track of whether a CD table is installed in
> an STE so that arm_smmu_sync_cd can skip the sync when unnecessary. This
> was previously achieved through the domain->devices list, but we are
> moving to a model where arm_smmu_sync_cd directly operates on a master
> and the master's CD table instead of a domain.
> 
> Signed-off-by: Michael Shavit <mshavit at google.com>
> ---
> 
> Changes in v2:
> - Store field as a bit instead of a bool. Fix comment about STE being
>   live before the sync in write_ctx_desc().

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

Jason