Thanks, that was certainly the
problem. The error messages are misleading as is the xend log trace. The bdf
value returned is -1 which is why the trace output shows incorrect PCI
information. The attached patch e.g. might not be the prettiest output but it
would be correct.
From: Cui, Dexuan
[mailto:dexuan.cui@xxxxxxxxx]
Sent: Tuesday, July 22, 2008 10:10 PM
To: Ross Philipson; xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: RE: [Xen-devel] VM creation failure using passthrough with
latestunstable
>
File "//usr/lib/python/xen/xend/XendDomainInfo.py", line 2094, in
_constructDomain
> raise VmError("Fail to assign
device(%x:%x.%x): maybe VT-d is "
> VmError: Fail to assign device(ff:1f.7): maybe VT-d is not enabled,
or the device is not exist, or it has already been assigned to other domain
According
to the log (actually bdf = -1 here), I believe it's due to the recent
changeset:
Now
you need to specify "iommu=1" in the Xen grub entry
to assign iommu devices.
I
think the error message "Error: (‘<domain GUID>’,
‘VM_metrics’)" is confusing... We'd better improve it.
From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
[mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Ross
Philipson
Sent: 2008年7月23日 1:54
To: xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-devel] VM creation failure using passthrough with
latestunstable
I have pulled a recent (today’s) clone of
staging/xen-unstable.hg and I get a failure when trying to create a domain with
xend/xm. The failure I get is:
Error: (‘<domain GUID>’, ‘VM_metrics’)
I have traced the problem down to where the pci = [
’02:00.0’ ] parameter (which is the value in my case) from my configuration
file is being tested in xc.c:pyxc_test_assign_device(). This function fails and
causes the calling code in xm/create.py:make_domain() to fail. The attached log
shows the output where this fails – the wrong values for the bus/dev/func are
clearly being traced out.
Something changed in the last 2 – 3 weeks to cause this. I
do not see this issue with a July 2 pull of unstable. I will keep digging but I
hoped something would ring a bell.
Thanks
Ross
Ross Philipson
Senior Software Engineer
Citrix Systems, Inc
14 Crosby Drive
Bedford, MA 01730
781-301-7949
ross.philipson@xxxxxxxxxx
