From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andre Przywara Subject: Re: Booting/installing WindowsNT Date: Wed, 5 May 2010 10:32:30 +0200 Message-ID: <4BE12D1E.5000602@amd.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> Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1"; format=flowed Content-Transfer-Encoding: 7bit Cc: Michael Tokarev , KVM list To: Avi Kivity Return-path: Received: from tx2ehsobe005.messaging.microsoft.com ([65.55.88.15]:37949 "EHLO TX2EHSOBE010.bigfish.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932189Ab0EEIdq (ORCPT ); Wed, 5 May 2010 04:33:46 -0400 In-Reply-To: <4BE049F5.4000500@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: 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. > What about disabling ACPI? smp should still work through the mptable. Didn't make a difference. Regards, Andre. -- Andre Przywara AMD-Operating System Research Center (OSRC), Dresden, Germany Tel: +49 351 448-3567-12