From mboxrd@z Thu Jan  1 00:00:00 1970
From: Dana Goyette <DanaGoyette@gmail.com>
Subject: genirq: Flags mismatch irq 17. 00000000 (vfio-intx(0000:07:04.0))
 vs. 00000000 (vfio-intx(0000:01:00.1))
Date: Fri, 10 Jan 2014 08:23:16 -0800
Message-ID: <lap6p9$r2f$1@ger.gmane.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
To: kvm@vger.kernel.org
Return-path: <kvm-owner@vger.kernel.org>
Received: from plane.gmane.org ([80.91.229.3]:40712 "EHLO plane.gmane.org"
	rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
	id S1751311AbaAJQXh (ORCPT <rfc822;kvm@vger.kernel.org>);
	Fri, 10 Jan 2014 11:23:37 -0500
Received: from list by plane.gmane.org with local (Exim 4.69)
	(envelope-from <gcekd-kvm-devel@m.gmane.org>)
	id 1W1erv-0006sD-Ii
	for kvm@vger.kernel.org; Fri, 10 Jan 2014 17:23:35 +0100
Received: from dgoyette.mooo.com ([173.228.55.65])
        by main.gmane.org with esmtp (Gmexim 0.1 (Debian))
        id 1AlnuQ-0007hv-00
        for <kvm@vger.kernel.org>; Fri, 10 Jan 2014 17:23:35 +0100
Received: from DanaGoyette by dgoyette.mooo.com with local (Gmexim 0.1 (Debian))
        id 1AlnuQ-0007hv-00
        for <kvm@vger.kernel.org>; Fri, 10 Jan 2014 17:23:35 +0100
Sender: kvm-owner@vger.kernel.org
List-ID: <kvm.vger.kernel.org>

I'm using the SuperMicro X10SAT, kernel 3.13-rc5, with ACS override on 
Intel root ports.

I'm trying to pass several devices to the same guest:

01:00.0 -- [1002:68be] Radeon HD 5750
01:00.1 -- [1002:aa58] HDMI Audio (not really needed)
07:04.0 -- [13f6:8788] Xonar D1/DX sound card, behind PEX8112
09:00.0 -- [1912:0014] Renesas uPD720201 (USB 3.0)

When trying to start qemu with various combinations of those devices:
vfio: Error: Failed to setup INTx fd: Device or resource busy

Sound card conflicts with HDMI audio:
genirq: Flags mismatch irq 17.
00000000 (vfio-intx(0000:07:04.0)) vs.
00000000 (vfio-intx(0000:01:00.1))

USB controller conflicts with video card:
genirq: Flags mismatch irq 16.
00000000 (vfio-intx(0000:09:00.0)) vs.
00000000 (vfio-intx(0000:01:00.0))

On the ArchLinux forums, I was told that this means each device wants 
the interrupt line to itself.

Oddly, the host locks up if I launch Xorg with 'radeon' and 
'snd-virtuoso' both loaded.  (Primary video is the Intel graphics.)

These devices all work fine together using pci-assign, but pci-assign 
requires ejecting the Radeon before VM shutdown.

VFIO allows me to start the VM if I forward only the sound card and the 
video card, but I really need the USB controller, as well.

What can I do to forward those three devices via VFIO?