Re: [Xen-devel] Question: can new qemu-xen co-work with old rombios?

["Liu, Jinsong" <jinsong.liu@xxxxxxxxx>]

Ian Campbell wrote:
> On Tue, 2013-08-06 at 01:56 +0000, Liu, Jinsong wrote:
>> Ian Campbell wrote:
>>> On Mon, 2013-08-05 at 16:01 +0000, Liu, Jinsong wrote:
>>> 
>>>> can new qemu-xen co-work with old rombios?
>>> 
>>> No, this is not a supported combination.
>>> 
>>> qemu-trad == rombios
>>> qemu-xen == seabios or ovmf.
>>> 
>>> No other combinations are valid. Hopefully libxl/xl gave an error
>>> message when you tried? 
>>> 
>>> Ian.
>> 
>> Thanks Ian and Jacek!
>> 
>> Yes, libxl does give error messages:
>> libxl: error: libxl_dm.c:1300:libxl__destroy_device_model: could not
>> find device-model's pid for dom 1 libxl: error:
>> libxl.c:1415:libxl__destroy_domid: libxl__destroy_device_model
>> failed for 1  
> 
> Which version of Xen is this? Can you post the complete "xl -vvv
> create" output please, it really ought to be bailing with a message
> about the invalid combination of BIOS and qemu being attempted.
> 
> I suspect the messages above are just benign messages printed as part
> of the attempt to tear down a partially built domain after the
> original failure.
> 
> Ian.

My Xen git commit is 8f55cb0e360f977dc790adc393a6fd32b9933351.

xl -vvv create xl.hvm output are:
Parsing config from xl.hvm
libxl: debug: libxl_create.c:1230:do_domain_create: ao 0x11238a0: create: 
how=(nil) callback=(nil) poller=0x1122f30
libxl: error: libxl_dm.c:1300:libxl__destroy_device_model: could not find 
device-model's pid for dom 8
libxl: error: libxl.c:1415:libxl__destroy_domid: libxl__destroy_device_model 
failed for 8
libxl: debug: libxl_event.c:1569:libxl__ao_complete: ao 0x11238a0: complete, 
rc=-3
libxl: debug: libxl_create.c:1243:do_domain_create: ao 0x11238a0: inprogress: 
poller=0x1122f30, flags=ic
libxl: debug: libxl_event.c:1541:libxl__ao__destroy: ao 0x11238a0: destroy
xc: debug: hypercall buffer: total allocations:20 total releases:20
xc: debug: hypercall buffer: current allocations:0 maximum allocations:2
xc: debug: hypercall buffer: cache current size:2
xc: debug: hypercall buffer: cache hits:16 misses:2 toobig:2

BTW, just for test&debug purpose, is there any easy way to work around to make 
new qemu-xen co-work with old rombios?

Thanks,
Jinsong
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