Re: [PATCH 05/15] Coalesce userspace/kernel irqchip interrupt injection logic.

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Dmitry Eremin-Solenikov wrote:
> Jan Kiszka пишет:
>> Dmitry Eremin-Solenikov wrote:
>>> Jan Kiszka пишет:
>>>> Dmitry Eremin-Solenikov wrote:
>>>>> Gleb Natapov wrote:
>>>>>> On Wed, Apr 15, 2009 at 01:30:29PM +0400, Dmitry Eremin-Solenikov
>>>>>> wrote:
>>>>>>> qemu-x86_64 version 0.10.2 running on i386
>>>>>>> Due to problems with qemu-x86_64 I have to boot the 'host' kernel
>>>>>>> with 'noapic'.
>>>>>> Do you mean boot 'guest' kernel with noapic? The guest is what runs
>>>>>> inside qemu. So you are able to boot guest with 'noapic'?
>>>>>>
>>>>>> What is the command line you are using.
>>>>> Well, since this caused lot's of questions, here is my setup:
>>>>>
>>>>> Main host: Debian squeeze, kernel 2.6.28 or .29 (doesn't matter),
>>>>> qemu-system-x86_64 version 0.10.2
>>>>>
>>>>> KVM kernel run inside qemu: e3dbe3f408a46a045012f1882e9f62b27b8a616c
>>>>> from Avi's tree (KVM: x86 emulator: fix call near emulation) + these
>>>>> patches. I have to boot the kernels (both this kernel and 2.6.26 from
>>>>> debian) with noapic to w/around APIC problems (I dunno if it's qemu or
>>>>> bochsbios problem).
>>>> And the bios you are using with 0.10.2 is from 0.10.2 (when in doubt,
>>>> specify explicitly with -bios and/or -L)? Then this would be a QEMU
>>>> upstream bug.
>>> Indeed, there seem to be problems with upstream qemu bios. I was using
>>> the image from the debian's bochsbios package.
>>
>> Bochsbios is typically lacking some patches qemu needs, therefore that
>> bios patch queue in qemu.
> 
> Debian's bochsbios provides two bios versions: one for bochs and one
> patched with qemu (maybe not the latest patches though)
> 
>>> I asked qemu to use the
>>> bios from 0.10.2 release and got slightly different messages. Attached
>>> the kernel log
>>>
>>
>> ...
>>
>>> init IO_APIC IRQs
>>>  1-0 (apicid-pin) not connected
>>> IOAPIC[0]: Set routing entry (1-1 -> 0x31 -> IRQ 1 Mode:0 Active:0)
>>> IOAPIC[0]: Set routing entry (1-2 -> 0x30 -> IRQ 0 Mode:0 Active:0)
>>> IOAPIC[0]: Set routing entry (1-3 -> 0x33 -> IRQ 3 Mode:0 Active:0)
>>> IOAPIC[0]: Set routing entry (1-4 -> 0x34 -> IRQ 4 Mode:0 Active:0)
>>> IOAPIC[0]: Set routing entry (1-5 -> 0x35 -> IRQ 5 Mode:0 Active:0)
>>> IOAPIC[0]: Set routing entry (1-6 -> 0x36 -> IRQ 6 Mode:0 Active:0)
>>> IOAPIC[0]: Set routing entry (1-7 -> 0x37 -> IRQ 7 Mode:0 Active:0)
>>> IOAPIC[0]: Set routing entry (1-8 -> 0x38 -> IRQ 8 Mode:0 Active:0)
>>> IOAPIC[0]: Set routing entry (1-9 -> 0x39 -> IRQ 9 Mode:1 Active:1)
>>> IOAPIC[0]: Set routing entry (1-10 -> 0x3a -> IRQ 10 Mode:0 Active:0)
>>> IOAPIC[0]: Set routing entry (1-11 -> 0x3b -> IRQ 11 Mode:0 Active:0)
>>> IOAPIC[0]: Set routing entry (1-12 -> 0x3c -> IRQ 12 Mode:0 Active:0)
>>> IOAPIC[0]: Set routing entry (1-13 -> 0x3d -> IRQ 13 Mode:0 Active:0)
>>> IOAPIC[0]: Set routing entry (1-14 -> 0x3e -> IRQ 14 Mode:0 Active:0)
>>> IOAPIC[0]: Set routing entry (1-15 -> 0x3f -> IRQ 15 Mode:0 Active:0)
>>>  1-16 1-17 1-18 1-19 1-20 1-21 1-22 1-23 (apicid-pin) not connected
>>> ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1
>>> ..MP-BIOS bug: 8254 timer not connected to IO-APIC
>>> ...trying to set up timer (IRQ0) through the 8259A ...
>>> ..... (found apic 0 pin 2) ...
>>> ....... failed.
>>> ...trying to set up timer as Virtual Wire IRQ...
>>> ..... failed.
>>> ...trying to set up timer as ExtINT IRQ...
>>> ..... failed  :( .
>>> Kernel panic - not syncing: IO-APIC + timer doesn't work!  Boot with
>>> apic=debug and send a report.  Then try booting with the 'noapic'
>>> option.
>>
>> This looks a bit like [1, 2] on first glance...
>>
>> Jan
>>
>> [1] http://permalink.gmane.org/gmane.comp.emulators.qemu/41300
>> [2] http://permalink.gmane.org/gmane.comp.emulators.qemu/41433
> 
> Looks like a part of this changes.

You mean the kernel boots for you now?

> However I don't quite understand:
> these patches should address non-ACPI OS, but linux is surely and ACPI os!

That's what I also do not understand ATM. I've once seen the above error
as well, but with a !CONFIG_ACPI kernel. However, I'd suggest to move
the issue (if it still exists) to qemu-devel until we reach KVM
specifics again.

Jan

-- 
Siemens AG, Corporate Technology, CT SE 2
Corporate Competence Center Embedded Linux
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