linux-kernel - Re: [PATCH v3 0/2] KVM: MSR-based features

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Message-ID: <CANRm+CzHgLsOar4ZJSn_cyOauH5b99zP=O34MM+f9t5Xe9i+fg@mail.gmail.com>
Date:   Tue, 17 Apr 2018 16:39:54 +0800
From:   Wanpeng Li <kernellwp@...il.com>
To:     Tom Lendacky <thomas.lendacky@....com>
Cc:     "the arch/x86 maintainers" <x86@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>, kvm <kvm@...r.kernel.org>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Joerg Roedel <joro@...tes.org>, Borislav Petkov <bp@...en8.de>,
        Thomas Gleixner <tglx@...utronix.de>,
        Radim Krčmář <rkrcmar@...hat.com>
Subject: Re: [PATCH v3 0/2] KVM: MSR-based features

2018-02-22 3:39 GMT+08:00 Tom Lendacky <thomas.lendacky@....com>:
> The following series implements support within KVM for MSR-based features.
> The first patch creates the MSR-based feature framework used to retrieve
> the available MSR-based features.  The second patch makes use of the
> framework to allow a guest to determine if the LFENCE instruction is
> serializing on AMD processors.

Is there a qemu patch for LFENCE instruction?

Regards,
Wanpeng Li

>
> This series is based on the master branch of the KVM git tree.
>
> https://git.kernel.org/pub/scm/virt/kvm/kvm.git
>
> ---
>
> Changes from v2:
> - Moved back to initializing the MSR-based feature list in kvm_init_msr_list()
>   (based on the kvm_x86_ops callback return code)
> - Removed the definition of KVM_GET_MSR and switched back to using KVM_GET_MSRS
> - Consolidated the documentation to group the ioctl usage and describe the usage
>   specific to the version of the ioctl used.
>
> Tom Lendacky (2):
>       KVM: x86: Add a framework for supporting MSR-based features
>       KVM: SVM: Add MSR-based feature support for serializing LFENCE
>
>
>  Documentation/virtual/kvm/api.txt |   29 +++++++++++----
>  arch/x86/include/asm/kvm_host.h   |    2 +
>  arch/x86/kvm/svm.c                |   43 ++++++++++++++++++++++
>  arch/x86/kvm/x86.c                |   72 +++++++++++++++++++++++++++++++++++--
>  include/uapi/linux/kvm.h          |    1 +
>  5 files changed, 136 insertions(+), 11 deletions(-)
>
> --
> Tom Lendacky