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Date: Mon, 09 Jan 2017 12:56:00 +0100
From: Harry Schmalzbauer <freebsd@omnilan.de>
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To: Peter Grehan <grehan@freebsd.org>
CC: freebsd-virtualization@freebsd.org
Subject: Re: [Bug 215740] [bhyve] utilizing passthru breaks raw device usage
 with virtio-blk | ahci-hd
References: <bug-215740-27103@https.bugs.freebsd.org/bugzilla/>
 <bug-215740-27103-tq0ISbGda2@https.bugs.freebsd.org/bugzilla/>
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 Bezüglich bugzilla-noreply@freebsd.org's Nachricht vom 04.01.2017 21:37
(localtime):
> https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=215740
>
…
> --- Comment #1 from Peter Grehan <grehan@FreeBSD.org> ---
> Would you be able to post a verbose dmesg (boot -v) ?

Due to lack of knowledge I experimented with BIOS VT-d settings "Remap
Interrupt enable" and "Remap DMA enable".
No difference in any combination.
Is there anything else I can provide to help narrowing down the problem?
Has anybody else ever tried such a VM (using character special file as
virtio-blk backend together with a passthru device)? With success?

Thanks,

-harry