From owner-freebsd-virtualization@freebsd.org  Tue May 17 07:06:18 2016
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From: John Baldwin <jhb@freebsd.org>
To: freebsd-virtualization@freebsd.org
Cc: David Ehrmann <ehrmann@gmail.com>,
 Vesselin Mirewski <v.mirewski@bugsys.org>
Subject: Re: pptdevs option crashes system
Date: Tue, 17 May 2016 00:06:12 -0700
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On Sunday, April 24, 2016 11:57:55 AM David Ehrmann wrote:
> It sounds like the bug I reported a while ago, but on a different chip
> family:
> 
> https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=207602

As a workaround on 10.3 and later you can use 'devctl set driver' to
mark devices for pass through post-boot rather than using the loader.conf
option.  E.g.:

# devctl set driver pci0:11:0:0 ppt

Currently there's no way to undo this, you can can 'set driver' to a
"native" driver if one exists.

-- 
John Baldwin