Re: [Xen-devel] FreeBSD Dom0 IOMMU issues

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 06/05/15 17:29, Michael Dexter wrote:
>
> Hello all,
>
> I have been working with Roger Pau Monné to bring FreeBSD Dom0 support
> to a production-ready state but we appear to have hit an IOMMU issue.
>
> Hardware: Lenovo ThinkPad T420 i7-2640M CPU @ 2.80GHz with 16GB RAM.
>
> I am attaching my console logs which first show my loader.conf file
> the DomU .cfg file and then DomU boot with Xorg starting.
>
> In the end I get:
>
> (XEN) ****************************************
> (XEN) Panic on CPU 2:
> (XEN) queue invalidate wait descriptor was not executed
> (XEN) ****************************************
>
> Please let me know if you want me to try any configuration changes.

One of the fault symptoms is the same as reported by Intel recently, but
no patches are currently available.  (well - some are, but they are
being argued over).

Are you using a full debug Xen?

~Andrew

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