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

On 8/11/2026 6:18 AM, Sean Christopherson wrote:
> 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?

Sorry I forgot to remove RFC while sending the v3, will remove it from
next version onward.

> 
> 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/[email protected]

Sure. I'll look into it and will see if anyone from the AMD is working
on it actively.


Thanks
Sairaj