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Re: [Xen-devel] HVM and WIndows NT

To: mats petersson <mats@xxxxxxxxxxxxxxxxx>
Subject: Re: [Xen-devel] HVM and WIndows NT
From: Alexandre CABROL PERALES <alexandre.cabrol@xxxxxxxx>
Date: Thu, 06 Aug 2009 17:14:54 +0200
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my main concern is :
i have to use windows nt in 1280x1024,
how can i reach this goal with xen 3.3 or upper?

Seems there is a bug in Cirrus Video Card about screen resize.

However there is no bug on this qemu emulation with kvm.

So is there any way to patch qemu-dm video card emulator with current
qemu version?

or what is the latest version of qemu used to dev qemu-dm?
I red a doc from 2007 which said that qemu-dm is based on qemu 8.

is it still true?

if not what is the base version of qemu used in qemu-dm for xen 3.3 and
xen 3.4 ?


mats petersson a écrit :
> A while (> 2 years ago), I'm sure I ran up Windows NT on Xen 3.0 or
> 3.1. But that was on an AMD processor, and it's highly likely that the
> BIOS / NT interaction  is broken in the Intel only "simulation of
> real-mode via vritual 8086 mode". The AMD processors support true Real
> Mode in Virtual machine mode.
> Of course, this may all have changed a huge amount, so do not rely on
> my information.
> --
> Mats
> 2009/8/6 Alexandre CABROL PERALES <alexandre.cabrol@xxxxxxxx>:
> Hi everybody,
> i'm currently trying to run Windows NT 4.0 on Xen.
> I can install it with Xen 3.3 and CPUID below:
> # Intel(R) Pentium(R) 4 CPU
> cpuid = [
> '0x00000000:eax=0x00000002,ebx=0x756e6547,ecx=0x6c65746e,edx=0x49656e69',
> '0x00000001:eax=0x00000f12,ebx=0x00010808,ecx=0x00000000,edx=0x3febfbff',
> '0x00000002:eax=0x665b5001,ebx=0x00000000,ecx=0x00000000,edx=0x007a7040',
> '0x80000000:eax=0x80000004,ebx=0x00000000,ecx=0x00000000,edx=0x00000000',
> '0x80000001:eax=0x00000000,ebx=0x00000000,ecx=0x00000000,edx=0x00000000',
> '0x80000002:eax=0x20202020,ebx=0x20202020,ecx=0x20202020,edx=0x6e492020',
> '0x80000003:eax=0x286c6574,ebx=0x50202952,ecx=0x69746e65,edx=0x52286d75',
> '0x80000004:eax=0x20342029,ebx=0x20555043,ecx=0x30352e31,edx=0x007a4847',
>          ]
> But i have an issue with Video Card emulation of Xen 3.3.1 :
> when i use Cirrus Logic emulation,
> during display test the system crash with yellow or green screen.
> It seems that Cirrus emulation didn't support the resizing.
> If i try stdvga mode the videocard is not recognised by Windows NT.
> I tried on KVM and it works fine with cirrus logic emulation.
> Is there any way to update qemu-dm with current qemu version ?
> regards,
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