From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: Booting/installing WindowsNT Date: Wed, 05 May 2010 11:41:10 +0300 Message-ID: <4BE12F26.9050502@redhat.com> References: <4BDB44C2.7090204@msgid.tls.msk.ru> <4BDB4E58.50805@msgid.tls.msk.ru> <4BDD4E32.2080503@redhat.com> <4BDDA455.8090001@msgid.tls.msk.ru> <4BDE882F.5000009@amd.com> <4BDE8DF4.8070604@redhat.com> <4BDE9757.8090809@amd.com> <4BDF01CA.80505@msgid.tls.msk.ru> <4BDFE3A7.2050706@redhat.com> <4BE00E2A.2010901@amd.com> <4BE015BF.2010401@msgid.tls.msk.ru> <4BE03CD7.8090105@amd.com> <4BE049F5.4000500@redhat.com> <4BE12D1E.5000602@amd.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Michael Tokarev , KVM list To: Andre Przywara Return-path: Received: from mx1.redhat.com ([209.132.183.28]:38784 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932189Ab0EEIlT (ORCPT ); Wed, 5 May 2010 04:41:19 -0400 In-Reply-To: <4BE12D1E.5000602@amd.com> Sender: kvm-owner@vger.kernel.org List-ID: On 05/05/2010 11:32 AM, Andre Przywara wrote: > Avi Kivity wrote: >> On 05/04/2010 06:27 PM, Andre Przywara wrote: >>> >>>> 3. In all other cases so far it BSoDs with STOP 0x3E error >>>> right before displaying that kernel message. >>> MSDN talks about a mulitprocessor configuration error: >>> http://msdn.microsoft.com/en-us/library/ms819006.aspx >>> I suspected the offline CPUs in the mptable that confuse NT. But >>> -smp 1,maxcpus=1 does not make a difference. I will try to dig >>> deeper in this area. > OK, I tackled this down. It is the max CPUID level that differs. > In the AMD CPUID guide leafs 0000_0002 till 0000_0004 are reserved, > the CPU that Michael and I used (K8RevF) actually have a max leaf of 1 > here. > Default qemu64 has a max leaf of 4. > So by saying -cpu qemu64,level=1 (or 2 or 3) it works for me. > Modern OS only read leaf 4 on Intel systems, it seems that NT4 is > missing this. > I will now think about a proper fix for this. I don't understand. Shouldn't the values for cpuid leaf 4 be the same for qemu64 whether the cpu is Intel or AMD? The real cpuid shouldn't matter. -- error compiling committee.c: too many arguments to function