From mboxrd@z Thu Jan  1 00:00:00 1970
From: "H. Peter Anvin" <hpa@zytor.com>
Subject: Re: Xen HVM regression on certain Intel CPUs
Date: Wed, 27 Mar 2013 10:30:09 -0700
Message-ID: <51532CA1.6030809@zytor.com>
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To: Stefan Bader <stefan.bader@canonical.com>
Cc: wei.y.yang@intel.com, "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>, haitao.shan@intel.com, xin.li@intel.com, Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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On 03/27/2013 10:28 AM, Stefan Bader wrote:
> 
> I will need more time to look into this (and unlikely today) but it
> feels like at least the cpuid flags passed on to HVM guest may be
> not influenced by the smep boot argument. Probably rather something
> I could do by masking in the config of the guest (which could be
> another pain as I normally configure those via libvirt).
> 

There is an "nosmep" kernel command line option.

	-hpa