Date: Wed, 6 Dec 2017 13:52:28 +0100
From: Peter Zijlstra <peterz@infradead.org>
To: Jan Dakinevich <jan.dakinevich@virtuozzo.com>
Cc: linux-kernel@vger.kernel.org, "Denis V . Lunev" <den@virtuozzo.com>,
        Roman Kagan <rkagan@virtuozzo.com>, Ingo Molnar <mingo@redhat.com>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        Jiri Olsa <jolsa@redhat.com>, Namhyung Kim <namhyung@kernel.org>,
        Thomas Gleixner <tglx@linutronix.de>, "H. Peter Anvin" <hpa@zytor.com>,
        x86@kernel.org, Paolo Bonzini <pbonzini@redhat.com>,
        Radim =?utf-8?B?S3LEjW3DocWZ?= <rkrcmar@redhat.com>,
        Andi Kleen <ak@linux.intel.com>, Kan Liang <kan.liang@intel.com>,
        Stephane Eranian <eranian@google.com>,
        Colin King <colin.king@canonical.com>,
        Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
        Jin Yao <yao.jin@linux.intel.com>, kvm@vger.kernel.org
Subject: Re: [PATCH RFC 2/2] KVM: x86/vPMU: ignore access to LBR-related MSRs
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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 :-)