Re: [Xen-devel] HVM guest question (was Re: [PATCH] ioemu: Cleanup the code of PCI passthrough.)

[Andrew Lyon <andrew.lyon@xxxxxxxxx>]

On Mon, Feb 23, 2009 at 2:53 PM, Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx> wrote:
> Boris Derzhavets writes ("Re: [Xen-devel] Re: [PATCH] ioemu: Cleanup the code 
> of PCI passthrough."):
>>  I was under impression, that mentioned patch is supposed to support
>> loading HVM DomU (?).
>
> No, it's just code cleanup for PCI passthrough, which is for passing
> PCI devices through to guests.  If you are not doing PCI passthrough -
> ie, most ordinary HVM guests - then these changes will not affect you.
>
>>  If answer is "yes" , then my question:-
>> When http://xenbits.xensource.com/xen-unstable.hg will get this update?
>
> In this case, just now.  All changes that we make to xen-unstable,
> including the qemu-xen-unstable subsidiary tree, go through an
> automated build-and-test.  Only versions which pass the (fairly
> rudimentary) tests make it through to the main trees.
>
> The pre-testing trees (called `staging') are also available and
> published but not the `usual' case.
>
>> Looks like "make tools" is using
>> http://xenbits.xensource.com/git-http/qemu-xen-unstable.git when
>> building xen-unstable.hg/tools/ioemu-remote.
>
> Yes.  You can change this by setting the CONFIG_QEMU make variable, eg
> in a file `.config' in the xen-unstable.hg top level.
>
>> If answer is "no", i am sorry for misunderstanding.
>>
>>   Fresh Xen-Unstable Dom0 install (along with the most recent build
>> 2.6.29-rc5) still shows during attempt to start HVM DomU:-
>
> These messages are not very surprising.  Is it working ?

No, when try to start HVM on Xen unstable with pv_ops kernel I get this error:

[2009-02-22 14:01:53 3467] WARNING (image:470) domain xptest: device
model failure: pid 3735: malfunctioning (closed sentinel), killed; see
/var/log/xen/qemu-dm-xptest.log

cat /var/log/xen/qemu-dm-xptest.log

domid: 4
qemu: the number of cpus is 1
Using xvda for guest's hda
Strip off blktap sub-type prefix to /root/xp (drv 'aio')
Watching /local/domain/0/device-model/4/logdirty/next-active
Watching /local/domain/0/device-model/4/command
qemu_map_cache_init nr_buckets = 10000 size 3145728
shared page at pfn 1fffe
buffered io page at pfn 1fffc
Time offset set 0
Register xen platform.
Done register platform.
I/O request not ready: 0, ptr: 0, port: 0, data: 0, count: 0, size: 0

If I change the kernel to normal Xen kernel (not pv_ops) it works ok.

What can I do to debug?

Andy

>
> Ian.
>
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