[Pkg-xen-devel] Bug#748052: [Xen-devel] dom0 USB failing with "ehci-pci: probe of 0000:00:1d.0 faile

[Jan Beulich]

>>> On 20.05.14 at 18:25, <mike at estone.ca> wrote:
> I've added iommu=debug to the XEN CMD Line under grub.
> Attached is the xl dmesg log and system dmesg.

Okay, this at least clarifies there is a (relatively big) RMRR. There is
a change to the handling of these among the ones that'll become
4.3.3 - mind giving
http://xenbits.xen.org/gitweb/?p=xen.git;a=commitdiff;h=6c63041428cc348bcb2887afabd606bc4bd5523f
a try on top of your 4.3.2 (or trying the tip of the stable-4.3 branch)?

> What else did I miss that could be useful info?

At least the resolution of these addresses

(XEN) traps.c:3061: GPF (0000): ffff82c4c0186a91 -> ffff82c4c0218daa
(XEN) traps.c:3061: GPF (0000): ffff82c4c0186a91 -> ffff82c4c0218daa

into (symbol,offset) pairs, so we can at least make a first guess at
whether these are in any way related to your problem.

Jan