On Sun, Jun 15, 2025 at 02:47:15PM -0400, Demi Marie Obenour wrote: > Is a paravirtualized IOMMU with interrupt remapping something that makes > sense?
IMHO linking interrupt remapping to the iommu is a poor design, interrupt routing belongs in the irq subsystem, not in the iommu. The fact AMD and Intel both coupled their interrupt routing to their iommu hardware is just a weird design decision. ARM didn't do this, for instance. So I would not try to do this at all, you should have a para-virtualized IRQ interface, not an extension to virtio-iommu adding interrupt handling. :\ AFAIK hyperv shows how to build something like this. Jason
