linux-kernel - Re: [PATCH v2 6/7] KVM: x86/mmu: Rename kvm_mmu->get_cr3() to ->get_guest_cr3_or

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Message-ID: <de17199e-aff3-b664-73f5-9c88727d064e@redhat.com>
Date:   Wed, 12 Feb 2020 17:42:33 +0100
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Sean Christopherson <sean.j.christopherson@...el.com>
Cc:     Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 6/7] KVM: x86/mmu: Rename kvm_mmu->get_cr3() to
 ->get_guest_cr3_or_eptp()

On 12/02/20 17:28, Sean Christopherson wrote:
> On Wed, Feb 12, 2020 at 01:00:59PM +0100, Paolo Bonzini wrote:
>> On 07/02/20 18:37, Sean Christopherson wrote:
>>> Rename kvm_mmu->get_cr3() to call out that it is retrieving a guest
>>> value, as opposed to kvm_mmu->set_cr3(), which sets a host value, and to
>>> note that it will return L1's EPTP when nested EPT is in use.  Hopefully
>>> the new name will also make it more obvious that L1's nested_cr3 is
>>> returned in SVM's nested NPT case.
>>>
>>> No functional change intended.
>>
>> Should we call it "get_pgd", since that is how Linux calls the top-level
>> directory?  I always get confused by PUD/PMD, but as long as we only
>> keep one /p.d/ moniker it should be fine.
> 
> Heh, I have the exact same sentiment.  get_pgd() works for me.

Ok, I'll post a patch that uses get_guest_pgd() as soon as I open
kvm/next for 5.7 material.

Paolo