> From: Jason Gunthorpe <j...@nvidia.com> > Sent: Friday, May 19, 2023 4:19 AM > > On Thu, May 18, 2023 at 03:45:24PM -0400, Peter Xu wrote: > > > I see that Intel is already copied here (at least Yi and Kevin) so I assume > > there're already some kind of synchronizations on multi-vIOMMU vs recent > > works on Intel side, which is definitely nice and can avoid work conflicts. > > I actually don't know that.. Intel sees multiple DMAR blocks in SW and > they have kernel level replication of invalidation.. Intel doesn't > have a HW fast path yet so they can rely on mediation to fix it. Thus > I expect there is no HW replication of invalidations here. Kevin? >
No HW fast path so single vIOMMU instance is sufficient on Intel now.
