Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754495AbaDKRlK (ORCPT ); Fri, 11 Apr 2014 13:41:10 -0400 Received: from terminus.zytor.com ([198.137.202.10]:45596 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750952AbaDKRlF (ORCPT ); Fri, 11 Apr 2014 13:41:05 -0400 Message-ID: <5348291B.7090501@zytor.com> Date: Fri, 11 Apr 2014 10:40:43 -0700 From: "H. Peter Anvin" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.4.0 MIME-Version: 1.0 To: Jet Chen , "Romer, Benjamin M" CC: Fengguang Wu , Paolo Bonzini , Borislav Petkov , LKML Subject: Re: [visorchipset] invalid opcode: 0000 [#1] PREEMPT SMP References: <20140407111725.GC25152@localhost> <53444220.50009@intel.com> <53458A3A.1050608@intel.com> <20140409230114.GB8370@localhost> <5345D360.5000506@linux.intel.com> <53475344.5090009@linux.intel.com> <53481976.3020209@zytor.com> <534827F5.1020004@intel.com> In-Reply-To: <534827F5.1020004@intel.com> X-Enigmail-Version: 1.6 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 04/11/2014 10:35 AM, Jet Chen wrote: > > As Peter said, QEMU probably should *not* set the hypervisor bit. But based on my testing, I think KVM works properly in this case. > Either way, unless there is a CPUID interface exposed in CPUID levels 0x40000000+, then relying on the hypervisor bit to do VMCALL is wrong in the extreme. -hpa -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/