Re: [PATCH v2 0/4] Enable SMEP CPU Feature

From: Ingo Molnar
Date: Tue May 17 2011 - 03:05:49 EST

* H. Peter Anvin <hpa@xxxxxxxxx> 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.


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