linux-kernel - Re: [PATCH v2] mce: use safe MSR accesses

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Message-ID: <20150313222211.GD30678@pd.tnic>
Date:	Fri, 13 Mar 2015 23:22:11 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	jesse.larrew@....com
Cc:	x86@...nel.org, Joel Schopp <joel.schopp@....com>,
	Tony Luck <tony.luck@...el.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, linux-edac@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] mce: use safe MSR accesses

On Fri, Mar 13, 2015 at 11:03:39AM -0500, jesse.larrew@....com wrote:
> From: Jesse Larrew <jesse.larrew@....com>
> 
> Certain MSRs are only relevant to a kernel in host mode, and kvm had
> chosen not to implement these MSRs at all for guests. If a guest kernel
> ever tried to access these MSRs, the result was a general protection
> fault.
> 
> KVM will be separately patched to return 0 when these MSRs are read,
> and this patch ensures that MSR accesses are tolerant of exceptions.
> 
> Signed-off-by: Jesse Larrew <jesse.larrew@....com>
> ---
>  arch/x86/kernel/cpu/mcheck/mce.c | 11 +++--------
>  1 file changed, 3 insertions(+), 8 deletions(-)

Applied, thanks.

-- 
Regards/Gruss,
    Boris.

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