On Fri, 2025-04-04 at 12:38 -0700, Sean Christopherson wrote: > > This series is well tested except for one notable gap: I was not able to > fully test the AMD IOMMU changes. Long story short, getting upstream > kernels into our full test environments is practically infeasible. And > exposing a device or VF on systems that are available to developers is a > bit of a mess. If I can make AMD bare-metal "instances" available to you, would that help? Separately, I'd quite like to see the eventfd→MSI delivery linkage not use the IRQ routing table at all, and not need a GSI# assigned. Doing it that way is just a scaling and performance issue. I recently looked through the irqfd code and came to the conclusion that it wouldn't be hard to add a new user API which allows us to simply configure the kvm_irq_routing_entry to be delivered when a given eventfd fires, without using the table. I haven't had a chance to look hard, hopefully your rework doesn't make that any less feasible...
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