> From: Nicolin Chen <nicolinc@xxxxxxxxxx> > Sent: Friday, February 10, 2023 12:13 AM > > On Thu, Feb 09, 2023 at 02:50:39AM +0000, Tian, Kevin wrote: > > External email: Use caution opening links or attachments > > > > > > > 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. > > Hmm..this piece was directly copied from Jason's inputs before I > sent v1. And I thought he explained in the previous version. I > can drop it in v3 if that makes you happy. > Jason's reply was: > I think the guidance is about the change to VFIO uAPI where it is now > possible to change the domain attached, previously that was not > possible I cannot connect it to the above statement. Anyway if you think that guidance to userspace is necessary please connect it to the replace semantics to explain the motivation.
