linux-kernel - Re: [PATCH v6] KVM: x86: Add x2APIC "features" to control EOI broadcast suppression

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Message-ID: <177016270726.565816.4840269573401291170.b4-ty@google.com>
Date: Tue,  3 Feb 2026 16:10:17 -0800
From: Sean Christopherson <seanjc@...gle.com>
To: Sean Christopherson <seanjc@...gle.com>, pbonzini@...hat.com, kai.huang@...el.com, 
	dwmw2@...radead.org, Khushit Shah <khushit.shah@...anix.com>
Cc: mingo@...hat.com, x86@...nel.org, bp@...en8.de, hpa@...or.com, 
	linux-kernel@...r.kernel.org, kvm@...r.kernel.org, 
	dave.hansen@...ux.intel.com, tglx@...utronix.de, jon@...anix.com, 
	shaju.abraham@...anix.com, stable@...r.kernel.org
Subject: Re: [PATCH v6] KVM: x86: Add x2APIC "features" to control EOI
 broadcast suppression

On Fri, 23 Jan 2026 12:56:25 +0000, Khushit Shah wrote:
> Add two flags for KVM_CAP_X2APIC_API to allow userspace to control support
> for Suppress EOI Broadcasts when using a split IRQCHIP (I/O APIC emulated
> by userspace), which KVM completely mishandles. When x2APIC support was
> first added, KVM incorrectly advertised and "enabled" Suppress EOI
> Broadcast, without fully supporting the I/O APIC side of the equation,
> i.e. without adding directed EOI to KVM's in-kernel I/O APIC.
> 
> [...]

Applied to kvm-x86 misc, with some minor formatting tweaks.  Thanks!

[1/1] KVM: x86: Add x2APIC "features" to control EOI broadcast suppression
      https://github.com/kvm-x86/linux/commit/6517dfbcc918

--
https://github.com/kvm-x86/linux/tree/next