linux-kernel - Re: [PATCH 2/8] KVM: nSVM: rename nested 'vmcb' to vmcb

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Message-ID: <3effc656-20e8-40c9-d0e3-5c700d9b5572@redhat.com>
Date:   Thu, 20 Aug 2020 12:56:34 +0200
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Maxim Levitsky <mlevitsk@...hat.com>, kvm@...r.kernel.org
Cc:     Jim Mattson <jmattson@...gle.com>, Joerg Roedel <joro@...tes.org>,
        Borislav Petkov <bp@...en8.de>,
        Thomas Gleixner <tglx@...utronix.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        "open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)" 
        <linux-kernel@...r.kernel.org>,
        "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" <x86@...nel.org>,
        Ingo Molnar <mingo@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Sean Christopherson <sean.j.christopherson@...el.com>
Subject: Re: [PATCH 2/8] KVM: nSVM: rename nested 'vmcb' to vmcb_gpa in few
 places

On 20/08/20 12:23, Maxim Levitsky wrote:
> I fully agree that adding local variable is a good idea anyway.
> 
> I was just noting that svm->nested.vmcb is already about the nested
> (e.g vmcb12) thus I was thinking that naming this field vmcb12 would be
> redundant and not accepted this way.

We want to have both svm->nested.vmcb12 and svm->nested.vmcb02 in there,
and hsave is also a VMCB of sort (somewhat like a vmcb01 that is only
used while running a nested guest).  So it is clearer to write _which_
vmcb it is, and it also helps by making terminology consistent between
VMX and SVM.

Paolo