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From:   Jim Mattson <jmattson@google.com>
Date:   Fri, 1 Jul 2022 09:11:11 -0700
Message-ID: <CALMp9eRA0v6BK6KG81ZE_iLKF6VNXxemN=E4gAE4AM-V4gkdHQ@mail.gmail.com>
Subject: Re: [PATCH v2 22/28] KVM: VMX: Clear controls obsoleted by EPT at
 runtime, not setup
To:     Vitaly Kuznetsov <vkuznets@redhat.com>
Cc:     kvm@vger.kernel.org, Paolo Bonzini <pbonzini@redhat.com>,
        Sean Christopherson <seanjc@google.com>,
        Anirudh Rayabharam <anrayabh@linux.microsoft.com>,
        Wanpeng Li <wanpengli@tencent.com>,
        Maxim Levitsky <mlevitsk@redhat.com>,
        linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org
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On Wed, Jun 29, 2022 at 8:07 AM Vitaly Kuznetsov <vkuznets@redhat.com> wrote:
>
> From: Sean Christopherson <seanjc@google.com>
>
> Clear the CR3 and INVLPG interception controls at runtime based on
> whether or not EPT is being _used_, as opposed to clearing the bits at
> setup if EPT is _supported_ in hardware, and then restoring them when EPT
> is not used.  Not mucking with the base config will allow using the base
> config as the starting point for emulating the VMX capability MSRs.
>
> Signed-off-by: Sean Christopherson <seanjc@google.com>
> Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Nit: These controls aren't "obsoleted" by EPT; they're just no longer required.

Reviewed-by: Jim Mattson <jmattson@google.com>