linux-kernel - Re: [PATCH V2 0/7] KVM: X86/MMU: Use one-off special shadow page for special roots

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Message-ID: <CALzav=e-4npHpR6XbCe_JO1R74_=KivoGfM9bB6uHxnuF+X+Gw@mail.gmail.com>
Date:   Fri, 13 May 2022 11:31:53 -0700
From:   David Matlack <dmatlack@...gle.com>
To:     Lai Jiangshan <jiangshanlai@...il.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        "open list:KERNEL VIRTUAL MACHINE FOR MIPS (KVM/mips)" 
        <kvm@...r.kernel.org>, Paolo Bonzini <pbonzini@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Lai Jiangshan <jiangshan.ljs@...group.com>
Subject: Re: [PATCH V2 0/7] KVM: X86/MMU: Use one-off special shadow page for
 special roots

On Fri, May 13, 2022 at 1:22 AM Lai Jiangshan <jiangshanlai@...il.com> wrote:
>
> On Tue, May 3, 2022 at 11:06 PM Lai Jiangshan <jiangshanlai@...il.com> wrote:
> >
> > From: Lai Jiangshan <jiangshan.ljs@...group.com>
> >
> > Current code uses mmu->pae_root, mmu->pml4_root, and mmu->pml5_root to
> > setup special roots.  The initialization code is complex and the roots
> > are not associated with struct kvm_mmu_page which causes the code more
> > complex.
> >
> > So add new special shadow pages to simplify it.

FYI I plan to review this after I get a v5 Eager Page Splitting out
(today hopefully). But from looking at it so far, it looks like a
great cleanup!

> >
>
> Ping