From: Avi Kivity <avi@redhat.com>
To: "Li, Xin" <xin.li@intel.com>
Cc: "Yang, Wei Y" <wei.y.yang@intel.com>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>
Subject: Re: [Patch v3] Enable CPU SMEP feature for KVM
Date: Sun, 29 May 2011 09:42:30 +0300 [thread overview]
Message-ID: <4DE1EAD6.1040902@redhat.com> (raw)
In-Reply-To: <FC2FB65B4D919844ADE4BE3C2BB739AD5AA81842@shsmsx501.ccr.corp.intel.com>
On 05/29/2011 08:16 AM, Li, Xin wrote:
> >
> > > + else
> > > + best->ebx&= ~(bit(X86_FEATURE_SMEP));
> >
> > Not needed - x86.c already masks unsupported features.
>
> Should KVM still support guest SMEP when host disables it thru nosmep?
No. We treat nosmep as "no smep for the kernel and any guests". NX is
treated in the same way.
--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.
next prev parent reply other threads:[~2011-05-29 6:42 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-26 13:28 [Patch v3] Enable CPU SMEP feature for KVM Yang, Wei Y
2011-05-27 2:56 ` Tian, Kevin
2011-05-27 8:47 ` Avi Kivity
2011-05-27 8:45 ` Avi Kivity
2011-05-29 5:16 ` Li, Xin
2011-05-29 6:42 ` Avi Kivity [this message]
2011-05-29 7:15 ` Li, Xin
2011-05-29 7:20 ` Avi Kivity
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