From: Ingo Molnar <mingo@elte.hu>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>,
Thomas Gleixner <tglx@linutronix.de>,
Asit K Mallick <asit.k.mallick@intel.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Avi Kivity <avi@redhat.com>,
Arjan van de Ven <arjan@infradead.org>,
Andrew Morton <akpm@linux-foundation.org>,
Andi Kleen <andi@firstfloor.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
Pekka Enberg <penberg@cs.helsinki.fi>
Subject: Re: [PATCH v2 0/4] Enable SMEP CPU Feature
Date: Tue, 17 May 2011 09:05:27 +0200 [thread overview]
Message-ID: <20110517070527.GD22305@elte.hu> (raw)
In-Reply-To: <4DD19C81.8000902@zytor.com>
* H. Peter Anvin <hpa@zytor.com> wrote:
> On 05/16/2011 02:34 PM, Fenghua Yu wrote:
> >
> > Note: This patch set doesn't enable the SMEP feature in KVM. If it's needed,
> > another patch will be pushed for enabling the feature in KVM.
> >
>
> Hi Avi,
>
> Could you comment on if this needs to be a gating factor?
I think KVM would benefit from the native kernel playing guinea pig whether
SMEP is really, truly 100% trouble-free to enable by default (for Linux) ;-)
Some programmable configurability seems necessary on the KVM side, as KVM has
no control over how sane the guest kernel is.
Thanks,
Ingo
next prev parent reply other threads:[~2011-05-17 7:05 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-16 21:34 [PATCH v2 0/4] Enable SMEP CPU Feature Fenghua Yu
2011-05-16 21:34 ` [PATCH v2 1/4] x86, cpu: Add CPU flags for SMEP Fenghua Yu
2011-05-17 1:56 ` H. Peter Anvin
2011-05-16 21:34 ` [PATCH v2 2/4] x86, cpu: Add SMEP CPU feature in CR4 Fenghua Yu
2011-05-16 21:34 ` [PATCH v2 3/4] x86, head_32/64.S: Enable SMEP Fenghua Yu
2011-05-17 2:10 ` Matthew Garrett
2011-05-17 23:08 ` Yu, Fenghua
2011-05-17 23:12 ` H. Peter Anvin
2011-05-18 2:57 ` Yu, Fenghua
2011-05-16 21:34 ` [PATCH v2 4/4] x86/kernel/common.c: Disable SMEP by kernel option nosmep Fenghua Yu
2011-05-16 22:01 ` Thomas Gleixner
2011-05-16 21:52 ` [PATCH v2 0/4] Enable SMEP CPU Feature H. Peter Anvin
2011-05-17 7:05 ` Ingo Molnar [this message]
2011-05-17 9:15 ` Avi Kivity
2011-05-17 9:29 ` Ingo Molnar
2011-05-17 9:32 ` Avi Kivity
2011-05-17 10:46 ` Ingo Molnar
2011-05-17 11:34 ` Avi Kivity
2011-05-17 11:38 ` Ingo Molnar
2011-05-17 11:44 ` Avi Kivity
2011-05-17 11:47 ` Avi Kivity
2011-05-17 11:49 ` Pekka Enberg
2011-05-17 11:50 ` Ingo Molnar
2011-05-19 6:10 ` Tian, Kevin
2011-05-19 6:41 ` Shan, Haitao
2011-05-20 8:21 ` Ingo Molnar
2011-05-17 7:03 ` Ingo Molnar
2011-05-17 9:16 ` Avi Kivity
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