RE: [PATCH v2 00/10] Add IO page table replacement support

[Tian, Kevin]

> From: Nicolin Chen <nicolinc@xxxxxxxxxx>
> Sent: Wednesday, February 8, 2023 5:18 AM
> 
> QEMU with this feature should have the vIOMMU maintain a cache of the
> guest io page table addresses and assign a unique IOAS to each unique
> guest page table.
> 

I still didn't see a clear reply why above is required. Please elaborate.