RE: [PATCH 07/12] iommu/vt-d: Cleanup use of iommu_flush_iotlb_psi()

[Tian, Kevin]

> From: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>
> Sent: Monday, March 25, 2024 10:17 AM
> 
> Use cache_tag_flush_range() in switch_to_super_page() to invalidate the
> necessary caches when switching mappings from normal to super pages. The
> iommu_flush_iotlb_psi() call in intel_iommu_memory_notifier() is
> unnecessary since there should be no cache invalidation for the identity
> domain.
> 

what about a software identity domain?