linux-kernel - Re: [PATCH 5/6] KVM: x86: never clear irr_pending in kvm_apic_update

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Message-ID: <350532d2-b01b-1d7c-fff3-c3cb171996e8@redhat.com>
Date:   Thu, 9 Dec 2021 15:12:36 +0100
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Maxim Levitsky <mlevitsk@...hat.com>, kvm@...r.kernel.org
Cc:     "open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)" 
        <linux-kernel@...r.kernel.org>, Wanpeng Li <wanpengli@...cent.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Joerg Roedel <joro@...tes.org>,
        "H. Peter Anvin" <hpa@...or.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Borislav Petkov <bp@...en8.de>,
        "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" <x86@...nel.org>,
        Ingo Molnar <mingo@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Jim Mattson <jmattson@...gle.com>,
        Sean Christopherson <seanjc@...gle.com>
Subject: Re: [PATCH 5/6] KVM: x86: never clear irr_pending in
 kvm_apic_update_apicv

On 12/9/21 12:54, Maxim Levitsky wrote:
> Also reorder call to kvm_apic_update_apicv to be after
> .refresh_apicv_exec_ctrl, although that doesn't guarantee
> that it will see up to date IRR bits.

Can you spell out why do that?

Paolo