linux-kernel - Re: [RFC 03/14] KVM: x86/MMU: Move the Shadow MMU implementation to shadow

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Date:   Fri, 13 Jan 2023 10:06:27 -0800
From:   Vipin Sharma <vipinsh@...gle.com>
To:     Ben Gardon <bgardon@...gle.com>
Cc:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        Paolo Bonzini <pbonzini@...hat.com>,
        Peter Xu <peterx@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>,
        David Matlack <dmatlack@...gle.com>,
        Nagareddy Reddy <nspreddy@...gle.com>
Subject: Re: [RFC 03/14] KVM: x86/MMU: Move the Shadow MMU implementation to shadow_mmu.c

On Wed, Dec 21, 2022 at 2:40 PM Ben Gardon <bgardon@...gle.com> wrote:
>
> On Wed, Dec 21, 2022 at 2:24 PM Ben Gardon <bgardon@...gle.com> wrote:
> >
> > Cut and paste the implementation of the Shadow MMU to shadow_mmu.(c|h).
> > This is a monsterously large commit, moving ~3500 lines. With such a
> > large move, there's no way to make it easy. Do the move in one massive
> > step to simplify dealing with merge conflicts and to make the git
> > history a little easier to dig through. Several cleanup commits follow
> > this one rather than preceed it so that their git history will remain
> > easy to see.
> >
> > No functional change intended.
> >
> > Signed-off-by: Ben Gardon <bgardon@...gle.com>
>
> Woops, I guess this message bounced because the patch was just too long.
> I can try to split it in two if folks would prefer, or just send a
> list of the functions / definitions moved.
>

Interesting, I can see this patch in my email client,
lore.kernel.org/lkml but not in patchwork.kernel.org

One more way can be to move declarations to shadow_mmu.h first and
then in subsequent patch move definitions to shadow_mmu.c. I do agree
it won't reduce size much but it will make it easier to see which
functions are becoming the part of API.

> > ---
> >  arch/x86/kvm/debugfs.c          |    1 +
> >  arch/x86/kvm/mmu/mmu.c          | 4526 ++++---------------------------
> >  arch/x86/kvm/mmu/mmu_internal.h |    4 +-
> >  arch/x86/kvm/mmu/shadow_mmu.c   | 3408 +++++++++++++++++++++++
> >  arch/x86/kvm/mmu/shadow_mmu.h   |  145 +
> >  5 files changed, 4086 insertions(+), 3998 deletions(-)
> >
>
> ...
>
> > --
> > 2.39.0.314.g84b9a713c41-goog
> >