linux-kernel - Re: [PATCH 0/5] KVM: x86/mmu: TDP MMU fixes for 6.2

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Message-ID: <acb8adfc5a2ace34010dc70d5ccd2821ff0a1ecb.camel@linux.intel.com>
Date:   Wed, 14 Dec 2022 20:01:04 +0800
From:   Robert Hoo <robert.hu@...ux.intel.com>
To:     Sean Christopherson <seanjc@...gle.com>,
        Paolo Bonzini <pbonzini@...hat.com>
Cc:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Greg Thelen <gthelen@...gle.com>,
        David Matlack <dmatlack@...gle.com>,
        Ben Gardon <bgardon@...gle.com>,
        Mingwei Zhang <mizhang@...gle.com>
Subject: Re: [PATCH 0/5] KVM: x86/mmu: TDP MMU fixes for 6.2

On Tue, 2022-12-13 at 03:30 +0000, Sean Christopherson wrote:
> Fix three fatal TDP MMU bugs introduced in 6.2,

introduced in 6.1? or earlier?

>  harden related code,
> and clean up kvm_tdp_mmu_map() to eliminate the need for gotos.
> 
> Sean Christopherson (5):
>   KVM: x86/mmu: Don't attempt to map leaf if target TDP MMU SPTE is
>     frozen
>   KVM: x86/mmu: Map TDP MMU leaf SPTE iff target level is reached
>   KVM: x86/mmu: Re-check under lock that TDP MMU SP hugepage is
>     disallowed
>   KVM: x86/mmu: Don't install TDP MMU SPTE if SP has unexpected level
>   KVM: x86/mmu: Move kvm_tdp_mmu_map()'s prolog and epilog to its
> caller
> 
>  arch/x86/kvm/mmu/mmu.c          |  9 +++++++-
>  arch/x86/kvm/mmu/mmu_internal.h |  1 -
>  arch/x86/kvm/mmu/tdp_mmu.c      | 39 +++++++++++++++--------------
> ----
>  3 files changed, 26 insertions(+), 23 deletions(-)
> 
> 
> base-commit: 51229fd7872f82af07498aef5c79ad51baf81ea0

I cannot find this base commit in my tree, where I just pulled to
latest queue yesterday. But find this series can be applied to this
latest queue as well.

commit 9d75a3251adfbcf444681474511b58042a364863 (origin/queue, queue)
Author: Sean Christopherson <seanjc@...gle.com>
Date:   Wed Dec 7 00:09:59 2022 +0000

    KVM: x86: Add proper ReST tables for userspace MSR exits/flags