From mboxrd@z Thu Jan  1 00:00:00 1970
From: Marcelo Tosatti <mtosatti@redhat.com>
Subject: Re: FreeBSD Guest Freezes during boot up on Linux KVM, RHEL 6.4 or
 RHEL 6.5
Date: Mon, 29 Sep 2014 15:32:07 -0300
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Cc: Paolo Bonzini <pbonzini@redhat.com>,
	Ramanjaneyulu Talla <Ramanjaneyulu.Talla@citrix.com>,
	"KVM devel mailing list (kvm@vger.kernel.org)" <kvm@vger.kernel.org>,
	dongxiao xu <dongxiao.xu@intel.com>,
	xiantao zhang <xiantao.zhang@intel.com>,
	"gleb@redhat.com" <gleb@redhat.com>,
	Bill Chuan <bill.chuan@intel.com>
To: Venkateswara Rao Nandigam <venkateswararao.nandigam@citrix.com>
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On Fri, Sep 26, 2014 at 07:31:17AM +0000, Venkateswara Rao Nandigam wrote:
> Hi Paolo,
> 
> As suggested by You, the following is the issue info. Is this something to be fixed in host kernel?
> 
> Description: 
> FreeBSD 64bit(10.0) Guest freezes at "booting...." on Linux KVM, host running RHEL6.4 or RHEL 6.5.
> Tested various versions of FreeBSD, Any version of FreeBSD 64bit will freeze the same way.
> The issue occurs only on RHEL6.4 or RHEL6.5 host, if the Physical CPU has "SMEP" feature enabled.
> In these host versions, if the kernel loaded with "nosmep" boot parameter, cannot find "SMEP" feature on '/proc/cpuinfo',
> And FreeBSD guest boots properly.

This issue has been fixed in kernel-2.6.32-472.el6.