linux-kernel - Re: [PATCH v2 0/6] KVM: x86/mmu: refine memtype related mmu zap

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Message-ID: <ZG1XOHBKZbxNEjQK@google.com>
Date:   Tue, 23 May 2023 17:15:52 -0700
From:   Sean Christopherson <seanjc@...gle.com>
To:     Yan Zhao <yan.y.zhao@...el.com>
Cc:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        pbonzini@...hat.com
Subject: Re: [PATCH v2 0/6] KVM: x86/mmu: refine memtype related mmu zap

On Tue, May 09, 2023, Yan Zhao wrote:
> This series refines mmu zap caused by EPT memory type update.
> Yan Zhao (6):
>   KVM: x86/mmu: add a new mmu zap helper to indicate memtype changes
>   KVM: x86/mmu: only zap EPT when guest CR0_CD changes
>   KVM: x86/mmu: only zap EPT when guest MTRR changes
>   KVM: x86/mmu: Zap all EPT leaf entries according noncoherent DMA count
>   KVM: x86: Keep a per-VM MTRR state
>   KVM: x86/mmu: use per-VM based MTRR for EPT
> 
>  arch/x86/include/asm/kvm_host.h |   3 +
>  arch/x86/kvm/mmu.h              |   1 +
>  arch/x86/kvm/mmu/mmu.c          |  18 ++++-
>  arch/x86/kvm/mtrr.c             | 112 +++++++++++++++++++++++++-------
>  arch/x86/kvm/vmx/vmx.c          |   2 +-
>  arch/x86/kvm/x86.c              |  10 ++-
>  arch/x86/kvm/x86.h              |   6 +-
>  7 files changed, 122 insertions(+), 30 deletions(-)
> 
> 
> base-commit: 5c291b93e5d665380dbecc6944973583f9565ee5
> -- 

To save us both a bit of pain, can you base the next version on top of my PAT
cleanup[*]?  I am planning on applying that series "soon".  Thanks!

[*] https://lore.kernel.org/all/20230511233351.635053-1-seanjc@google.com