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

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Message-ID: <5123BBBC.2080008@zytor.com>
Date:	Tue, 19 Feb 2013 09:51:56 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Borislav Petkov <bp@...en8.de>, 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 02/19/2013 09:47 AM, Borislav Petkov wrote:
> 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?
>

Separate patch, please, and yes, I would greatly appreciate it.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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