Jeremy Fitzhardinge wrote:
> On 09/23/09 16:05, Simon Horman wrote:
>> On Wed, Sep 23, 2009 at 12:17:23PM -0700, Jeremy Fitzhardinge wrote:
>>
>>> On 09/22/09 22:32, Simon Horman wrote:
>>>
>>>> Hi,
>>>>
>>>> while trying to boot xen/master at the following changest the boot
>>>> locks up somewhere around the initialisation of PCI. Boot log and
>>>> config attached. Any insights appreciated.
>>>>
>>>> commit 398b4b4cabdb27c06a7b8214c2044347ffc08c49
>>>> Merge: 3973dcf... 6e8f158...
>>>> Author: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>
>>>> Date: Tue Sep 22 15:21:28 2009 -0700
>>>>
>>>> Merge branch 'xen/dom0/drm' into xen/master
>>>>
>>>> * xen/dom0/drm:
>>>> swiotlb: linux/swiotlb.h needs linux/dma-mapping.h
>>>>
>>>>
>>>> My grub snippet is:
>>>>
>>>> title Xen
>>>> root (hd0,0)
>>>> kernel /xen com1=115200,8n1,0x3f8,0 console=com1
>>>> loglvl=all guest_loglvl=all dom0_mem=1G
>>>> module /vmlinuz-2.6.31-pvops
>>>> root=/dev/mapper/sam-root_x86_64 console=ttyS0 loglevel=8 ro
>>>> earlyprintk=xen module /initrd.img-2.6.31-pvops
>>>>
>>>>
>>>>
>>> You should really be using hvc0 for the console. I think ttyS0
>>> "passthrough"/emulation should work, but using the Xen console is
>>> more reliable. And you're just losing all console output on the
>>> switchover, which suggests that serial isn't actually working.
>>> Failing that, can you get more info from the VGA console?
>>>
>> Hi Jeremy, Hi Pasi,
>>
>> Thanks for the advice with regards to hvc0, that is working well.
>> I am now observing a problem while initialising the iommu.
>> I have worked around this by setting iommu=off.
>>
>
> Ah, OK, someone else noticed that too. I guess we should inhibit
> iommu init somehow.
>
> Keir, is Xen supposed to disable the DMAR for dom0 by stomping on acpi
> or something? Or was that about something else?
>
Now Xen will zap ACPI DMAR signature to prevent dom0 using VT-d. pv-ops dom0
shouldn't use VT-d.
Simon, I noticed you use xen c/s 20010, pls try xen c/s 20181.
Regards,
Weidong
Regards,
Weidong
> J
>
>
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