linux-kernel - Re: [PATCH] KVM: SVM: vNMI pending bit is V_NMI_PENDING_MASK not V_NMI_BLOCKING

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Message-ID: <168574913038.1016879.4889109727408335591.b4-ty@google.com>
Date:   Fri,  2 Jun 2023 17:52:24 -0700
From:   Sean Christopherson <seanjc@...gle.com>
To:     Sean Christopherson <seanjc@...gle.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        "Maciej S. Szmigiero" <mail@...iej.szmigiero.name>
Cc:     Maxim Levitsky <mlevitsk@...hat.com>,
        Santosh Shukla <santosh.shukla@....com>, vkuznets@...hat.com,
        jmattson@...gle.com, thomas.lendacky@....com, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] KVM: SVM: vNMI pending bit is V_NMI_PENDING_MASK not V_NMI_BLOCKING_MASK

On Fri, 19 May 2023 13:26:18 +0200, Maciej S. Szmigiero wrote:
> While testing Hyper-V enabled Windows Server 2019 guests on Zen4 hardware
> I noticed that with vCPU count large enough (> 16) they sometimes froze at
> boot.
> With vCPU count of 64 they never booted successfully - suggesting some kind
> of a race condition.
> 
> Since adding "vnmi=0" module parameter made these guests boot successfully
> it was clear that the problem is most likely (v)NMI-related.
> 
> [...]

Applied to kvm-x86 fixes, thanks!

[1/1] KVM: SVM: vNMI pending bit is V_NMI_PENDING_MASK not V_NMI_BLOCKING_MASK
      https://github.com/kvm-x86/linux/commit/b2ce89978889

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