linux-kernel - Re: [GIT PULL] x86/cpu changes for v3.9

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Message-ID: <20130219174758.GB4465@pd.tnic>
Date:	Tue, 19 Feb 2013 18:47:58 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Ingo Molnar <mingo@...nel.org>,
	Boris Ostrovsky <boris.ostrovsky@....com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [GIT PULL] x86/cpu changes for v3.9

On Tue, Feb 19, 2013 at 09:38:31AM -0800, H. Peter Anvin wrote:
> My fault... I was tracking the fix and lost track of the thread.
> 
> The problem is that the fix is necessary but not sufficient, as it
> introduces an undesirable host-guest dependency.  In order to allow
> neerw guests to work on older hosts we also should use the
> {rd,wr}msr_safe() functions to manipulate this MSR, with a comment
> as to why.
> 
> Boris, could you prepare such a patch, please?

I don't think Boris O. is at AMD anymore. Want me to add that to my fix
for kvm or prep a separate patch?

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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