MINIX 3.1.6 works in QEMU-0.12.3 only with KVM disabled

MINIX 3.1.6 works in QEMU-0.12.3 only with KVM disabled

[Erik van der Kouwe]

Dear all,

I've submitted this bug report a week ago:
http://sourceforge.net/tracker/?func=detail&aid=2962575&group_id=180599&atid=893831

I was wondering if work has already been done on this (maybe the problem 
was already known) and whether patches to fix this and/or workarounds 
are known.

Thanks for any answers,
Erik van der Kouwe

Re: MINIX 3.1.6 works in QEMU-0.12.3 only with KVM disabled

[Avi Kivity]

On 03/10/2010 12:26 PM, Erik van der Kouwe wrote:
> Dear all,
>
> I've submitted this bug report a week ago:
> http://sourceforge.net/tracker/?func=detail&aid=2962575&group_id=180599&atid=893831 
>
>
> I was wondering if work has already been done on this (maybe the 
> problem was already known) and whether patches to fix this and/or 
> workarounds are known.
>

MINIX is using big real mode which is currently not well supported by 
kvm on Intel hardware:

> (qemu) info registers
> EAX=00000010 EBX=00000009 ECX=49200000 EDX=0000a796
> ESI=00000200 EDI=49200200 EBP=00000009 ESP=0000a762
> EIP=0000f4a7 EFL=00023002 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0
> ES =0000 00000000 0000ffff 0000f300
> CS =f000 000f0000 0000ffff 0000f300
> SS =9492 00094920 0000ffff 0000f300
> DS =97ce 00097cec 0000ffff 0000f300

A ds.base of 0x97cec cannot be translated to a real mode segment.

There is some work to get this to work, but it is proceeding really 
slowly.  It should work on AMD hardware though.

-- 
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