Re: [Qemu-devel] Re: Breakage with local APIC routing

[Mohammed Gamal]

On Tue, Aug 25, 2009 at 9:56 AM, Jan Kiszka<address@hidden> wrote:
> Johannes Schindelin wrote:
>> Hi,
>>
>> On Sun, 17 Aug 2008, Jan Kiszka wrote:
>>
>>> Johannes Schindelin wrote:
>>>
>>>> On Wed, 13 Aug 2008, Jan Kiszka wrote:
>>>>
>>>>> Johannes Schindelin wrote:
>>>>>> due to the change in revision 3371 (well, at that time, CVS was used,
>>>>>> which was no better than Subversion) installation of win64 is broken
>>>>>> in QEmu.  The commit message reads like this:
>>>>>>
>>>>>>   Don't route PIC interrupts through the local APIC if the local
>>>>>>   APIC config says so. By Ari Kivity.
>>>>> I recalled some earlier post on this which claimed to fix the issue and
>>>>> found it in the archive:
>>>>>
>>>>> http://permalink.gmane.org/gmane.comp.emulators.qemu/25415
>>>> I tried this, and it changes the symptoms, indeed.  Instead of an endless
>>>> loop, it results in a bluescreen.
>>>>
>>>> As the OP said that it worked for him, I guess it is either in commits
>>>> that came after his post, or in my add-on patches.
>>> So we are likely on the wrong path. Maybe we have to understand what
>>> happens here first...
>>>
>>>> Hopefully I will find some time to work more on this bug.
>>> Would be interesting to know
>>>  - if pic_irq_request is continuously called or if it stops when windows
>>>    hangs
>>>  - what IRQ vectors are delivered
>>>  - in what state the apic is, namely the s->lvt[APIC_LVT_LINT0]
>>
>> Sorry for the long delay.  I just don't have time to take care of the
>> issue, but I quickly verified that it still does not work, with aa0cba4
>> (Aug 13 2009).
>>
>> If you are still interested in this issue, could you give me a hint
>> _where_ I should output _which_ values?  I'll gladly take time for that
>> now.
>
> If some OS does not properly install due to a possible emulation bug, I
> am interested, for sure. Let's restart this by specifying the test case
> more precisely: What version of Windows are you trying to install? What
> is your qemu command line? Where does the installation fail? Are there
> specific steps required during the installation to reproduce the problem?
>
> And one more question: Did you check that you were using the
> corresponding BIOS to aa0cba4?
>
> Jan
>
>

In case this is considered relevant. I am also facing a bug with
installing amd64 version of ubuntu-9.04. I first thought it was a
possible bug in KVM, but even when using -no-kvm the guest still hangs
just when starting to load the kernel.