RE: [PATCH 2/2] iommu/vt-d: Remove caching mode check before devtlb flush
From: Tian, Kevin
Date: Tue Apr 09 2024 - 20:32:18 EST
> From: Jacob Pan <jacob.jun.pan@xxxxxxxxxxxxxxx>
> Sent: Wednesday, April 10, 2024 1:32 AM
>
> If the guest uses SL page tables in vIOMMU, we don;t expose ATS to the
> guest. So ATS is not relevant here, does't matter map or unmap.
>
ATS is orthogonal to SL vs. FL. Where is this restriction coming from?