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Date:   Wed, 6 Dec 2017 13:52:28 +0100
From:   Peter Zijlstra <>
To:     Jan Dakinevich <>
        "Denis V . Lunev" <>,
        Roman Kagan <>,
        Ingo Molnar <>,
        Arnaldo Carvalho de Melo <>,
        Alexander Shishkin <>,
        Jiri Olsa <>,
        Namhyung Kim <>,
        Thomas Gleixner <>,
        "H. Peter Anvin" <>,,
        Paolo Bonzini <>,
        Radim Krčmář <>,
        Andi Kleen <>,
        Kan Liang <>,
        Stephane Eranian <>,
        Colin King <>,
        Sebastian Andrzej Siewior <>,
        Jin Yao <>,
Subject: Re: [PATCH RFC 2/2] KVM: x86/vPMU: ignore access to LBR-related MSRs

On Wed, Dec 06, 2017 at 02:43:03PM +0300, Jan Dakinevich wrote:
> Windows Server 2016 Essentials (for yet unknown reason) attempts to
> access MSR_LBR_TOS and other LBR-related registers at startup.  These
> are not currently hadled by KVM so the guest gets #GP and crashes.

Shiny feature :-)

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