Re: Booting/installing WindowsNT

[Andre Przywara <andre.przywara@amd.com>]

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