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[Xen-devel] Re: pvops: boot locks up while initialising PCI

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?

Aside from that, I'm not sure what's going on.  I don't normally see
messages from Xen about PCI devices.  Are you using MSI?  Does booting
with pci=nomsi work?


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