linux-kernel - Re: [PATCH 1/3] KVM: x86: Copy kvm_pmu_ops by value to eliminate layer of indirection

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Message-ID: <583a2f1b-1ac8-0a30-1b0a-e541ce739448@gmail.com>
Date:   Mon, 8 Nov 2021 17:26:04 +0800
From:   Like Xu <like.xu.linux@...il.com>
To:     Sean Christopherson <seanjc@...gle.com>
Cc:     Paolo Bonzini <pbonzini@...hat.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] KVM: x86: Copy kvm_pmu_ops by value to eliminate
 layer of indirection

On 5/11/2021 11:36 pm, Sean Christopherson wrote:
> On Fri, Nov 05, 2021, Sean Christopherson wrote:
>> On Wed, Nov 03, 2021, Like Xu wrote:
>> I would also say land this memcpy() above kvm_ops_static_call_update(), then the
>> enabling patch can do the static call updates in kvm_ops_static_call_update()
>> instead of adding another helper.
> 
> Ugh, kvm_ops_static_call_update() is defined in kvm_host.h.  That's completely
> unnecessary, it should have exactly one caller, kvm_arch_hardware_setup().  As a
> prep match, move kvm_ops_static_call_update() to x86.c, then it can reference the
> pmu ops.

Quite good and thank you.