linux-kernel - Re: [PATCH v3 00/13] KVM: Make irqfd registration globally unique

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Message-ID: <175079267460.517177.7949210108988821172.b4-ty@google.com>
Date: Tue, 24 Jun 2025 12:38:26 -0700
From: Sean Christopherson <seanjc@...gle.com>
To: Sean Christopherson <seanjc@...gle.com>, "K. Y. Srinivasan" <kys@...rosoft.com>, 
	Haiyang Zhang <haiyangz@...rosoft.com>, Wei Liu <wei.liu@...nel.org>, 
	Dexuan Cui <decui@...rosoft.com>, Juergen Gross <jgross@...e.com>, 
	Stefano Stabellini <sstabellini@...nel.org>, Paolo Bonzini <pbonzini@...hat.com>, 
	Ingo Molnar <mingo@...hat.com>, Peter Zijlstra <peterz@...radead.org>, 
	Juri Lelli <juri.lelli@...hat.com>, Vincent Guittot <vincent.guittot@...aro.org>, 
	Shuah Khan <shuah@...nel.org>, Marc Zyngier <maz@...nel.org>, Oliver Upton <oliver.upton@...ux.dev>
Cc: linux-kernel@...r.kernel.org, linux-hyperv@...r.kernel.org, 
	xen-devel@...ts.xenproject.org, kvm@...r.kernel.org, 
	linux-kselftest@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
	kvmarm@...ts.linux.dev, K Prateek Nayak <kprateek.nayak@....com>, 
	David Matlack <dmatlack@...gle.com>
Subject: Re: [PATCH v3 00/13] KVM: Make irqfd registration globally unique

On Thu, 22 May 2025 16:52:10 -0700, Sean Christopherson wrote:
> Non-KVM folks,
> 
> I am hoping to route this through the KVM tree (6.17 or later), as the non-KVM
> changes should be glorified nops.  Please holler if you object to that idea.
> 
> Hyper-V folks in particular, let me know if you want a stable topic branch/tag,
> e.g. on the off chance you want to make similar changes to the Hyper-V code,
> and I'll make sure that happens.
> 
> [...]

Applied to kvm-x86 irqs, thanks!

[01/13] KVM: Use a local struct to do the initial vfs_poll() on an irqfd
        https://github.com/kvm-x86/linux/commit/283ed5001d68
[02/13] KVM: Acquire SCRU lock outside of irqfds.lock during assignment
        https://github.com/kvm-x86/linux/commit/140768a7bf03
[03/13] KVM: Initialize irqfd waitqueue callback when adding to the queue
        https://github.com/kvm-x86/linux/commit/b5c543518ae9
[04/13] KVM: Add irqfd to KVM's list via the vfs_poll() callback
        https://github.com/kvm-x86/linux/commit/5f8ca05ea991
[05/13] KVM: Add irqfd to eventfd's waitqueue while holding irqfds.lock
        https://github.com/kvm-x86/linux/commit/86e00cd162a7
[06/13] sched/wait: Drop WQ_FLAG_EXCLUSIVE from add_wait_queue_priority()
        https://github.com/kvm-x86/linux/commit/867347bb21e1
[07/13] xen: privcmd: Don't mark eventfd waiter as EXCLUSIVE
        https://github.com/kvm-x86/linux/commit/a52664134a24
[08/13] sched/wait: Add a waitqueue helper for fully exclusive priority waiters
        https://github.com/kvm-x86/linux/commit/0d09582b3a60
[09/13] KVM: Disallow binding multiple irqfds to an eventfd with a priority waiter
        https://github.com/kvm-x86/linux/commit/2cdd64cbf990
[10/13] KVM: Drop sanity check that per-VM list of irqfds is unique
        https://github.com/kvm-x86/linux/commit/b599d44a71f1
[11/13] KVM: selftests: Assert that eventfd() succeeds in Xen shinfo test
        https://github.com/kvm-x86/linux/commit/033b76bc7f06
[12/13] KVM: selftests: Add utilities to create eventfds and do KVM_IRQFD
        https://github.com/kvm-x86/linux/commit/74e5e3fb0dd7
[13/13] KVM: selftests: Add a KVM_IRQFD test to verify uniqueness requirements
        https://github.com/kvm-x86/linux/commit/7e9b231c402a

--
https://github.com/kvm-x86/kvm-unit-tests/tree/next