[Bug 212256] xhci controllers cannot be used with ppt

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=212256

            Bug ID: 212256
           Summary: xhci controllers cannot be used with ppt
           Product: Base System
           Version: 10.3-STABLE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: usb
          Assignee: freebsd-usb at FreeBSD.org
          Reporter: mt at waldheinz.de

I can't pass XHCI controllers to bhyve guests because the PCI device is always
grabbed by the xhci driver instead of the ppt driver.

That this patch:

> https://svnweb.freebsd.org/base?view=revision&revision=281499

Fixes the problem for me. I'm manually applying it after every kernel update
since about a year. I stumbled upon that patch here:

> https://lists.freebsd.org/pipermail/freebsd-virtualization/2015-April/003499.html

It seems other people are affected by this problem as well, though the
workaround presented here:

> https://github.com/pr1ntf/iohyve/wiki/USB-3.0-PCI-Controller-Pass-through

seems worse to me, because it completely disables the xhci driver.

Basically I'd like to see the patch land in a released version at some point.
Because I lack any knowledge about the FreeBSD development model I'm unable to
determine that state of that patch -- maybe it's on the list already?

After one year I just thought maybe it's time to ask. :-)


Thanks,
-Matthias

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