linux-kernel - Re: [PATCH 1/2] VMware detection support for x86 and x86-64

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Message-ID: <48DCD9D9.9080008@redhat.com>
Date:	Fri, 26 Sep 2008 14:47:21 +0200
From:	Gerd Hoffmann <kraxel@...hat.com>
To:	"H. Peter Anvin" <hpa@...or.com>
CC:	Zachary Amsden <zach@...are.com>,
	Alok Kataria <akataria@...are.com>,
	Alok kataria <alokkataria1@...il.com>,
	Ingo Molnar <mingo@...e.hu>, Yan Li <elliot.li.tech@...il.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"joerg.roedel@....com" <joerg.roedel@....com>,
	"rjmaomao@...il.com" <rjmaomao@...il.com>,
	Yinghai Lu <yhlu.kernel@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Daniel Hecht <dhecht@...are.com>
Subject: Re: [PATCH 1/2] VMware detection support for x86 and x86-64

  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

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