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

[Jan Kiszka <jan.kiszka@siemens.com>]

On 2012-05-07 11:45, Michael Tokarev wrote:
> 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

Can you check if -global apic.vapic=off makes any difference in the
broken case? I'm facing general issues in that setup once I enable
virtio-block - independent of vapic on/off or in-kernel/userspace. The
boot freezes, and qemu can only be terminated via kill -9. So, retrying
with IDE as block interface would also be interesting.

Jan

-- 
Siemens AG, Corporate Technology, CT T DE IT 1
Corporate Competence Center Embedded Linux