From: Sean Christopherson <seanjc@google.com>
To: Sairaj Kodilkar <sarunkod@amd.com>
Cc: "Borislav Petkov (AMD)" <bp@alien8.de>,
"H. Peter Anvin" <hpa@zytor.com>,
"Joerg Roedel (AMD)" <joro@8bytes.org>,
"Paul E. McKenney" <paulmck@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Dapeng Mi <dapeng1.mi@linux.intel.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
Eric Biggers <ebiggers@kernel.org>,
Feng Tang <feng.tang@linux.alibaba.com>,
Ingo Molnar <mingo@redhat.com>, Jakub Kicinski <kuba@kernel.org>,
Jonathan Corbet <corbet@lwn.net>,
Li RongQing <lirongqing@baidu.com>,
Marco Elver <elver@google.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Randy Dunlap <rdunlap@infradead.org>,
Robin Murphy <robin.murphy@arm.com>,
Shuah Khan <skhan@linuxfoundation.org>,
Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>,
Thomas Gleixner <tglx@kernel.org>,
Vasant Hegde <vasant.hegde@amd.com>,
Will Deacon <will@kernel.org>,
iommu@lists.linux.dev, kvm@vger.kernel.org,
linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
x86@kernel.org
Subject: Re: [RFC PATCH v3 0/6] Add support for AMD IOMMU GAPPI
Date: Mon, 10 Aug 2026 17:48:09 -0700 [thread overview]
Message-ID: <anpxSbwbYzyJ1SQQ@google.com> (raw)
In-Reply-To: <20260713105033.15405-1-sarunkod@amd.com>
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@google.com
prev parent reply other threads:[~2026-08-11 0:48 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-13 10:50 [RFC PATCH v3 0/6] Add support for AMD IOMMU GAPPI Sairaj Kodilkar
2026-07-13 10:50 ` [RFC PATCH v3 1/6] iommu/amd: KVM: SVM: Rename cpu to apicid in IOMMU interface Sairaj Kodilkar
2026-07-13 10:50 ` [RFC PATCH v3 2/6] iommu/amd: KVM: SVM: Rename ga_log_intr to wakeup_intr " Sairaj Kodilkar
2026-07-13 10:50 ` [RFC PATCH v3 3/6] iommu/amd: KVM: SVM: Add explicit vCPU running state to " Sairaj Kodilkar
2026-07-13 11:08 ` sashiko-bot
2026-08-10 5:06 ` Sairaj Kodilkar
2026-08-11 0:34 ` Sean Christopherson
2026-07-13 10:50 ` [RFC PATCH v3 4/6] iommu/amd: Program guest-mode IRTEs for GAPPI wakeup when IRTE[IsRun] = 0 Sairaj Kodilkar
2026-07-13 11:07 ` sashiko-bot
2026-08-10 5:14 ` Sairaj Kodilkar
2026-07-13 10:50 ` [RFC PATCH v3 5/6] KVM: SVM: Add support for AMD IOMMU Guest APIC Physical Processor Interrupt (GAPPI) Sairaj Kodilkar
2026-07-13 11:11 ` sashiko-bot
2026-07-13 12:56 ` Sairaj Kodilkar
2026-08-11 0:40 ` Sean Christopherson
2026-08-10 5:54 ` Sairaj Kodilkar
2026-08-11 0:43 ` Sean Christopherson
2026-07-13 10:50 ` [RFC PATCH v3 6/6] iommu/amd: Provide kernel command line option to enable GAPPI Sairaj Kodilkar
2026-07-13 11:11 ` sashiko-bot
2026-08-10 6:12 ` Sairaj Kodilkar
2026-08-10 9:21 ` [RFC PATCH v3 0/6] Add support for AMD IOMMU GAPPI Sairaj Kodilkar
2026-08-11 0:48 ` Sean Christopherson [this message]
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