RE: [Xen-devel] Xen crashes with iommu=1

["Han, Weidong" <weidong.han@xxxxxxxxx>]

Jun Koi wrote:
> On Tue, Jul 28, 2009 at 11:42 AM, Han, Weidong<weidong.han@xxxxxxxxx>
> wrote: 
>> Jun Koi wrote:
>>> Hi,
>>> 
>>> The latest Xen unstable (c/s 19984) crashes when with iommu=1 (in
>>> Grub configuration) 
>>> 
>>> I attach here the screenshot. Any clue on how to fix this?
>>> 
>>> (My chipset supports VT-d)
>>> 
>>> Thanks,
>>> J
>> 
>> Which platform are you using?
> 
> that is 32bit, Intel Centrino 2.

In our testing environment, VT-d works on both 64bit and PAE Xen. But we don't 
have the platform like yours. It's strange 0:2.0 accesses a very big address 
0xffffff000. Pls try to add iommu_inclusive_mapping=1 in kernel line in grub.

Regards,
Weidong

> 
>> Did you use 2.6.18 dom0 or pv-ops dom0?
> 
> i use -unstable code, and Dom0 kernel is pvops.
> 
> you can see from the screenshot that machine hangup in Xen, and it
> doesnt reach the Dom0 code yet. so i dont think Dom0's kernel version
> matters here.
> 
>> If possible, pls post serial output.
> 
> too bad this is a laptop, and it has no serial interface :-(
> 
> thanks,
> J



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