Re: [Qemu-devel] current qemu git does not work with win7 guest

[Michael Tokarev]

On 07.05.2012 18:35, Michael Tokarev wrote:
> On 07.05.2012 18:18, Jan Kiszka wrote:
> []
>> I have a 32-bit WinXP here to test (but not a Win7-32) and will give it
> 
> I just found out that a 32bit guest is not enough.  The problem appears
> to be with 32bit userspace running under 64bit kernel only.  I just
> booted a 32bit kernel here on host, and now all windows guests reboot
> fine, with and without kvmvapic.bin file.
> 
>> a try later. What irritates me is that qemu.git has a problem here but
>> not latest qemu-kvm.git. Both are very similar now. Hmm, what is your
>> qemu.git command line again? Does it include "-machine
>> accel=kvm,kernel_irqchip=on" (to enable in-kernel irqchip)?
> 
> Rebooting... ;)

With kernel_irqchip=on it does not happen with qemu too, just like with
qemu-kvm.  So only 32bit userspace on 64bit kernel, and only with
kernel_irqchip = OFF, and only with 32bit version of win7 or winXP.

The kernel line is rather simple:

$ ./x86_64-softmmu/qemu-system-x86_64 -enable-kvm -drive 
file=w7x32sp1.raw,if=virtio,snapshot=on -m 1G -net none -machine 
accel=kvm,kernel_irqchip=on

Thanks!

/mjt