linux-kernel - Re: [PATCH v3] KVM: SVM: Disable AVIC on SNP-enabled system without HvInUseWrAllowed feature

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Message-ID: <173457536569.3292855.6833130316497808355.b4-ty@google.com>
Date: Wed, 18 Dec 2024 18:40:44 -0800
From: Sean Christopherson <seanjc@...gle.com>
To: Sean Christopherson <seanjc@...gle.com>, linux-kernel@...r.kernel.org, kvm@...r.kernel.org, 
	Suravee Suthikulpanit <suravee.suthikulpanit@....com>
Cc: pbonzini@...hat.com, joao.m.martins@...cle.com, 
	alejandro.j.jimenez@...cle.com, david.kaplan@....com, jon.grimm@....com, 
	santosh.shukla@....com
Subject: Re: [PATCH v3] KVM: SVM: Disable AVIC on SNP-enabled system without
 HvInUseWrAllowed feature

On Mon, 04 Nov 2024 07:58:45 +0000, Suravee Suthikulpanit wrote:
> On SNP-enabled system, VMRUN marks AVIC Backing Page as in-use while
> the guest is running for both secure and non-secure guest. Any hypervisor
> write to the in-use vCPU's AVIC backing page (e.g. to inject an interrupt)
> will generate unexpected #PF in the host.
> 
> Currently, attempt to run AVIC guest would result in the following error:
> 
> [...]

Applied to kvm-x86 fixes, thanks!

[1/1] KVM: SVM: Disable AVIC on SNP-enabled system without HvInUseWrAllowed feature
      https://github.com/kvm-x86/linux/commit/df7191833f7a

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