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From: "H. Peter Anvin" <hpa@zytor.com>
To: Borislav Petkov <bp@alien8.de>, Ingo Molnar <mingo@kernel.org>,
	Boris Ostrovsky <boris.ostrovsky@amd.com>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	linux-kernel@vger.kernel.org,
	Thomas Gleixner <tglx@linutronix.de>,
	Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [GIT PULL] x86/cpu changes for v3.9
Date: Tue, 19 Feb 2013 09:51:56 -0800	[thread overview]
Message-ID: <5123BBBC.2080008@zytor.com> (raw)
In-Reply-To: <20130219174758.GB4465@pd.tnic>

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.


  reply	other threads:[~2013-02-19 17:53 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-02-19 15:25 [GIT PULL] x86/cpu changes for v3.9 Ingo Molnar
2013-02-19 15:36 ` Borislav Petkov
2013-02-19 15:47   ` Ingo Molnar
2013-02-19 17:38     ` H. Peter Anvin
2013-02-19 17:47       ` Borislav Petkov
2013-02-19 17:51         ` H. Peter Anvin [this message]
2013-02-19 18:33           ` [PATCH 1/2] x86, CPU, AMD: Fix WC+ workaround for older hosts Borislav Petkov
2013-02-19 18:33             ` [PATCH 2/2] x86, kvm: Add MSR_AMD64_BU_CFG2 to the list of ignored MSRs Borislav Petkov
2013-02-19 19:30               ` [tip:x86/cpu] " tip-bot for Borislav Petkov
2013-02-19 19:29             ` [tip:x86/cpu] x86, cpu, amd: Fix WC+ workaround for older virtual hosts tip-bot for Borislav Petkov
2013-02-19 17:57         ` [GIT PULL] x86/cpu changes for v3.9 Konrad Rzeszutek Wilk
2013-02-19 18:01           ` Borislav Petkov
2013-02-19 18:19           ` Boris Ostrovsky
2013-02-19 18:21             ` H. Peter Anvin
2013-02-19 18:26               ` Boris Ostrovsky

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