On Fri, Aug 15, 2025 at 01:49:55PM +0800, Baolu Lu wrote: > On 8/12/25 06:59, Nicolin Chen wrote: > > Provide a callback from the PCI subsystem that will enclose the reset and > > have the iommu core temporarily change all the attached domain to BLOCKED. > > After attaching a BLOCKED domain, IOMMU drivers should fence any incoming > > Nit, my understanding is that it's not the "IOMMU drivers" but the > "IOMMU hardware" that fences any further incoming translation requests, > right? Yes. I will change this to: Provide a callback from the PCI subsystem that will enclose the reset and have the iommu core temporarily change all the attached domain to BLOCKED. After attaching a BLOCKED domain, IOMMU hardware would fence any incoming ATS queries. And IOMMU drivers should also synchronously stop issuing new ATS invalidations and wait for all ATS invalidations to complete. This can avoid any ATS invaliation timeouts. Thanks Nicolin
