From mboxrd@z Thu Jan  1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 42636] PCI passthrough does not work with AMD iommu for PCI
 device
Date: Fri, 30 Mar 2012 07:48:26 GMT
Message-ID: <201203300748.q2U7mQgO019932@bugzilla.kernel.org>
References: <bug-42636-28872@https.bugzilla.kernel.org/>
Mime-Version: 1.0
Content-Type: text/plain; charset="UTF-8"
To: kvm@vger.kernel.org
Return-path: <kvm-owner@vger.kernel.org>
Received: from bugzilla.kernel.org ([198.145.19.204]:56873 "EHLO
	bugzilla.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
	with ESMTP id S1757375Ab2C3Hs1 (ORCPT <rfc822;kvm@vger.kernel.org>);
	Fri, 30 Mar 2012 03:48:27 -0400
Received: from bugzilla.kernel.org (localhost [127.0.0.1])
	by bugzilla.kernel.org (8.14.5/8.14.5) with ESMTP id q2U7mQCx019933
	for <kvm@vger.kernel.org>; Fri, 30 Mar 2012 07:48:26 GMT
In-Reply-To: <bug-42636-28872@https.bugzilla.kernel.org/>
Sender: kvm-owner@vger.kernel.org
List-ID: <kvm.vger.kernel.org>

https://bugzilla.kernel.org/show_bug.cgi?id=42636


Daniel Mayer <listenmitglied@arcor.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |listenmitglied@arcor.de




--- Comment #3 from Daniel Mayer <listenmitglied@arcor.de>  2012-03-30 07:48:26 ---
Hi,
I feel with you - I had many, many headaches with PCI-PTrough...

You said you unloaded the driver module for both devices. 
a) do you have the pcistub module available (kernel config)? For some PCI
devices I had to enable both DMA and IRQ remapping in the kernel. The latter is
disabled by default. Otherwise: sometimes, especially with older PCI cards, IRQ
remapping had to be disabled... at least as module or compiled-in:

Bus options (PCI etc.) --> Support for DMA Remapping Devices
Bus options (PCI etc.) --> Enable DMA Remapping Devices
Bus options (PCI etc.) --> PCI Stub driver

[quote]
Of course, I unloaded the module of this additional device
before trying to passthrough it to the guest.[/qoute]

b) Did you try to assign the pcistub driver as printed here:
http://www.linux-kvm.org/page/How_to_assign_devices_with_VT-d_in_KVM

-- 
Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are watching the assignee of the bug.