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

From: Gleb Natapov <gleb@redhat.com>
To: Dmitry Eremin-Solenikov <dmitry.baryshkov@siemens.com>
Cc: Jan Kiszka <jan.kiszka@siemens.com>, kvm@vger.kernel.org
Subject: Re: [PATCH 05/15] Coalesce userspace/kernel irqchip interrupt injection logic.
Date: Wed, 15 Apr 2009 15:01:41 +0300	[thread overview]
Message-ID: <20090415120141.GG27675@redhat.com> (raw)
In-Reply-To: <49E5CAC4.3030002@siemens.com>

On Wed, Apr 15, 2009 at 03:53:40PM +0400, 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. I asked qemu to use the  
> bios from 0.10.2 release and got slightly different messages. Attached
> the kernel log
>
Now it seems to be a problem with KVM bios. KVM will not work with
upstream bochs or qemu bios only with its own version.

--
			Gleb.