RE: [PATCH v8 3/7] iommu/vt-d: Add domain_flush_pasid_iotlb()

[Tian, Kevin]

> From: Jacob Pan <jacob.jun.pan@xxxxxxxxxxxxxxx>
> Sent: Saturday, June 3, 2023 2:22 AM
> 
> From: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>
> 
> The VT-d spec requires to use PASID-based-IOTLB invalidation descriptor
> to invalidate IOTLB and the paging-structure caches for a first-stage
> page table. Add a generic helper to do this.
> 
> RID2PASID is used if the domain has been attached to a physical device,
> otherwise real PASIDs that the domain has been attached to will be used.
> 
> Signed-off-by: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>
> Signed-off-by: Jacob Pan <jacob.jun.pan@xxxxxxxxxxxxxxx>

Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>