From: Vladimir Davydov <vdavydov@parallels.com>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Borislav Petkov <bp@amd64.org>,
Andre Przywara <andre.przywara@amd.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Andi Kleen <ak@linux.intel.com>,
Borislav Petkov <borislav.petkov@amd.com>,
"x86@kernel.org" <x86@kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Andreas Herrmann <andreas.herrmann3@amd.com>
Subject: Re: [PATCH 2/2] cpu: intel, amd: mask cleared cpuid features
Date: Wed, 25 Jul 2012 10:58:11 +0400 [thread overview]
Message-ID: <500F9903.1020208@parallels.com> (raw)
In-Reply-To: <500F4463.9050702@zytor.com>
On 07/25/2012 04:57 AM, H. Peter Anvin wrote:
> On 07/24/2012 04:09 AM, Vladimir Davydov wrote:
>> We have not encountered this situation in our environments and I hope we
>> won't :-)
>>
>> But look, these CPUID functions cover majority of CPU features, don't
>> they? So, most of "normal" apps inside VM will survive migration.
>> Perhaps, some low-level utils won't. I guess that's why there are no
>> MSRs for other levels provided by vendors.
>>
> You will once Ivy Bridge becomes common.
Ivy Bridge has CPUID faulting, which allows masking all CPUID
levels/functions.
> -hpa
>
next prev parent reply other threads:[~2012-07-25 6:58 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-20 16:37 [PATCH 1/2] cpu: common: make clearcpuid option take bits list Vladimir Davydov
2012-07-20 16:37 ` [PATCH 2/2] cpu: intel, amd: mask cleared cpuid features Vladimir Davydov
2012-07-20 17:10 ` Andi Kleen
2012-07-20 17:18 ` H. Peter Anvin
2012-07-25 11:51 ` Vladimir Davydov
2012-07-20 17:20 ` H. Peter Anvin
2012-07-20 18:21 ` Vladimir Davydov
2012-07-20 20:19 ` H. Peter Anvin
2012-07-20 20:37 ` Vladimir Davydov
2012-07-21 10:37 ` Borislav Petkov
2012-07-24 7:06 ` Vladimir Davydov
2012-07-24 7:48 ` Borislav Petkov
2012-07-24 8:14 ` Andre Przywara
2012-07-24 8:29 ` Vladimir Davydov
2012-07-24 10:10 ` Borislav Petkov
2012-07-24 11:09 ` Vladimir Davydov
2012-07-24 12:34 ` Andre Przywara
2012-07-24 12:44 ` Alan Cox
2012-07-25 10:31 ` Vladimir Davydov
2012-07-25 10:58 ` Andre Przywara
2012-07-25 11:02 ` Vladimir Davydov
2012-07-25 11:17 ` Andre Przywara
2012-07-25 11:43 ` Vladimir Davydov
2012-07-25 11:31 ` Alan Cox
2012-07-25 11:46 ` Vladimir Davydov
2012-07-25 10:31 ` Vladimir Davydov
2012-07-25 10:43 ` Borislav Petkov
2012-07-25 11:39 ` Vladimir Davydov
2012-07-25 0:57 ` H. Peter Anvin
2012-07-25 6:58 ` Vladimir Davydov [this message]
2012-07-25 14:13 ` H. Peter Anvin
2012-07-25 11:49 ` Vladimir Davydov
2012-07-24 9:50 ` Borislav Petkov
2012-07-24 10:32 ` Alan Cox
2012-07-24 11:04 ` Borislav Petkov
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