On Wed, Jul 01, 2020 at 08:30:07PM +0800, Jason Wang wrote: > > I overlooked myself that the IR region will be there even if ir=off. > > > Yes, but the point stands still but the issue is still if ir=off. > > > > So I > > think the assert should stand. > > > Do you mean vhost can't trigger the assert()? If yes, I don't get how it > can't.
Yes. vhost can only trigger the translate() via memory API. No matter whether ir is on/off, the memory region is always enabled, so any access to 0xfeexxxxx from memory API should still land at s->mr_ir, afaict, rather than the dmar region. -- Peter Xu
