Panic on dom0 boot

[Stephen Borrill <netbsd%precedence.co.uk@localhost>]

I have just installed a 10.1_STABLE machine with xenkernel418.

After making the boot.cfg changes to boot xen and the the XEN3_DOMO 
kernel, I get a panic during autoconfiguration.

Initially it appeared to be related to ixgbe_attach(), so I tried without 
ixgbe and instead it panicked during mfii_attach(), so it seems a general 
PCI attach or MSI-X problem.

Traceback without details:

panic()
bind_pirq_to_evtch()
intr_establish_xname()
x86_pci_msix_establish()
mfii_attach() ot ixgbe_attach()
config_attached_internal)
config_found()
pci_probe_device1()

If it will help, I can try to connect a serial console after the weekend.

--
Stephen