Re: [RFC PATCH v3 0/6] Add support for AMD IOMMU GAPPI

[Sean Christopherson]

On Mon, Jul 13, 2026, Sairaj Kodilkar wrote:
> On newer generations of AMD processors, IOMMU AVIC/x2AVIC guest-mode interrupt
> remapping can use Guest APIC Physical Processor Interrupt (GAPPI) as an
> alternative host-notification path when device interrupts target a vCPU that
> is not running (IRTE[IsRun] = 0).

Why is this still an RFC?  I mean that in a good way.  I haven't looked at this
super duper closely, but the patches all look to be in generally good shape.
I.e. this seems well beyond RFC, unless there's a hard blocker or something,
e.g. known bugs?

Another bigger picture comment: I'm very tempted to say this has a hard dependency
on KVM's irq_test[*] adding support for AMD.  I know it's being worked on, but I
can't remember who is doing the work, or when it's expected...

[*] https://lore.kernel.org/all/20260626213534.3866178-1-seanjc@xxxxxxxxxx