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Date: Fri, 26 Sep 2008 14:47:21 +0200
From: Gerd Hoffmann <kraxel@redhat.com>
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To: "H. Peter Anvin" <hpa@zytor.com>
CC: Zachary Amsden <zach@vmware.com>, Alok Kataria <akataria@vmware.com>,
       Alok kataria <alokkataria1@gmail.com>, Ingo Molnar <mingo@elte.hu>,
       Yan Li <elliot.li.tech@gmail.com>,
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       Yinghai Lu <yhlu.kernel@gmail.com>,
       Thomas Gleixner <tglx@linutronix.de>, Daniel Hecht <dhecht@vmware.com>
Subject: Re: [PATCH 1/2] VMware detection support for x86 and x86-64
References: <20080221115452.GB13948@elte.hu>	 <20080907234510.GA24133@yantp.cn.ibm.com>	 <20080908140423.GG11993@elte.hu>	 <35f686220809241928k3669e30bi8a98b440443c4bff@mail.gmail.com>	 <48DB15DB.8040501@zytor.com> <1222317978.23524.117.camel@alok-dev1>	 <48DB1984.8020704@zytor.com> <1222318928.23524.121.camel@alok-dev1>	 <48DB1BCE.2070106@zytor.com>  <1222320201.23524.135.camel@alok-dev1>	 <1222375694.27056.179.camel@bodhitayantram.eng.vmware.com>	 <48DC09D9.7040204@zytor.com> <1222381254.27056.194.camel@bodhitayantram.eng.vmware.com> <48DC105D.9050803@zytor.com>
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  Hi,

> This, of course, is what CPUID is for.

... except that it doesn't always work.  It requires vmx/svm, otherwise
cpuid doesn't trap and thus can't be filled by the hypervisor ...

cheers,
  Gerd