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References: <20200925143422.21718-1-graf@amazon.com> <20200925143422.21718-3-graf@amazon.com>
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From:   Aaron Lewis <aaronlewis@google.com>
Date:   Mon, 28 Sep 2020 09:05:58 -0700
Message-ID: <CAAAPnDGVKDvVRdDK8yUzqXHzWzFK_9tnbwdmHkwbgcVb2wU5aA@mail.gmail.com>
Subject: Re: [PATCH v8 2/8] KVM: x86: Deflect unknown MSR accesses to user space
To:     Alexander Graf <graf@amazon.com>
Cc:     kvm list <kvm@vger.kernel.org>,
        Sean Christopherson <sean.j.christopherson@intel.com>,
        Paolo Bonzini <pbonzini@redhat.com>,
        Jonathan Corbet <corbet@lwn.net>,
        Vitaly Kuznetsov <vkuznets@redhat.com>,
        Wanpeng Li <wanpengli@tencent.com>,
        Jim Mattson <jmattson@google.com>,
        Joerg Roedel <joro@8bytes.org>,
        KarimAllah Raslan <karahmed@amazon.de>,
        Dan Carpenter <dan.carpenter@oracle.com>,
        Maxim Levitsky <mlevitsk@redhat.com>,
        linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org
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>
> This patch adds a generic interface to handle WRMSR and RDMSR from user
> space. With this, any future MSR that is part of the latter categories can
> be handled in user space.
>
> Furthermore, it allows us to replace the existing "ignore_msrs" logic with
> something that applies per-VM rather than on the full system. That way you
> can run productive VMs in parallel to experimental ones where you don't care
> about proper MSR handling.
>
> Signed-off-by: Alexander Graf <graf@amazon.com>
> Reviewed-by: Jim Mattson <jmattson@google.com>

Reviewed-by: Aaron Lewis <aaronlewis@google.com>

>
> ---
>
> v1 -> v2: