WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xci-devel

[Xci-devel] Re: [Xen-devel] Lenovo T400 problem

> > What device is under BDF: 0:3.7 ?
> No such device in the system.

<laughs> So you have a device that shows up mysteriously _after_ the
bootup. That is pretty mysterious.

.. snip

Hmm, I think there is a mechanism to "re-trigger" the PCI bus scan.
Try this:

echo 1 > /sys/class/pci_bus/0000:03/device/rescan

> > So from reading that it seems that the device in question: 0:3:7 hasn't
> > been actually authorized for to be used by your guest?
> >
> Yeap. There is no such device in the system. Full lspci is below:
..
> 00:03.0 Communication controller: Intel Corporation Mobile 4 Series
> Chipset MEI Controller (rev 07)
> 00:03.3 Serial controller: Intel Corporation Mobile 4 Series Chipset
> AMT SOL Redirection (rev 07)

Hmm, AMT is this fancy chipset that allows the System Admin to turn your
machine on/off, BIOS update, etc. I wonder if there is something further
on that. Can you turn it off and see what happens? Also, I would suggest
Google for 'Intel Mobile 4 Series MEI controller" and look at the spec
and see if they mention anything about device at function 7.

> 
> 
> >
> >> (XEN) print_vtd_entries: iommu = ffff83013bdf5f90 bdf = 0:3:7 gmfn = 6cb6
> >> (XEN)     root_entry = ffff83013bdcc000
> >> (XEN)     root_entry[0] = 137e44001
> >> (XEN)     context = ffff830137e44000
> >> (XEN)     context[1f] = 0_0
> >> (XEN)     ctxt_entry[1f] not present
> >
> > Sure enought. Not present it there.. Are there any other entries
> > (earlier on) that talk about BDF 0:3:7?
> >
> >
> 
> It looks that this failure is the result of trying to pass-through
> WLAN(3:0.0).  Interesting enough,- with this failure(coming

3:0.0 is much different from 0:3.X. It is on a different bus.

> periodically once in few minutes) the system boots and runs ok(I can't
> tell anything about its stability though). The problem becomes fatal
> only when I'm trying to pass-through usb and wlan together.

So if you pass in WLAN by itself it works fine. But if you pass in
USB + WLAN hell breaks loose?

I would look up specs about the WLAN then.

> Do you have any ideas were to start looking?

.. specs, and turn off AMT.
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel

_______________________________________________
Xci-devel mailing list
Xci-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/mailman/listinfo/xci-devel

<Prev in Thread] Current Thread [Next in Thread>