linux-kernel - Re: [PATCH] KVM: x86: trap AMD MSRs for the TSeg base and mask

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Message-ID: <20150918190710.GB26823@nazgul.tnic>
Date:	Fri, 18 Sep 2015 21:07:10 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	Paolo Bonzini <pbonzini@...hat.com>
Cc:	linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
	luto@...capital.net, konrad.wilk@...cle.com, crobinso@...hat.com,
	xen-devel@...ts.xensource.com, m.a.young@...ham.ac.uk,
	xen@...ts.fedoraproject.org
Subject: Re: [PATCH] KVM: x86: trap AMD MSRs for the TSeg base and mask

On Fri, Sep 18, 2015 at 05:34:24PM +0200, Paolo Bonzini wrote:
> These have roughly the same purpose as the SMRR, which we do not need
> to implement in KVM.  However, Linux accesses MSR_K8_TSEG_ADDR at
> boot, which causes problems when running a Xen dom0 under KVM.
> Just return 0, meaning that processor protection of SMRAM is not
> in effect.
> 
> Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>
> ---
>  arch/x86/include/asm/msr-index.h | 1 +
>  arch/x86/kvm/x86.c               | 2 ++
>  2 files changed, 3 insertions(+)

Acked-by: Borislav Petkov <bp@...e.de>

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
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