From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
To: Sander Eikelenboom <linux@eikelenboom.it>
Cc: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>
Subject: Re: [pvops-2.6.31.12 ]Fatal DMA error! Please use 'swiotlb=force' kernel BUG at drivers/pci/xen-iommu.c:227! invalid opcode: 0000 [#1] SMP
Date: Mon, 22 Mar 2010 15:10:55 -0400 [thread overview]
Message-ID: <20100322191055.GA31521@phenom.dumpdata.com> (raw)
In-Reply-To: <1954256379.20100311114453@eikelenboom.it>
On Thu, Mar 11, 2010 at 11:44:53AM +0100, Sander Eikelenboom wrote:
> Hi Konrad ,
>
> On this machine i'm using
> - xen-3.4.2
> - pvops 2.6.31.6 dom0 kernel
> - debian stock 2.6.26.2-xen kernels
> - All are 64bit, total system mem is 8GB, no hardware iommu present.
>
> I'm passing through several pci devices with great succes (worked stable for several months)
> - Soundcard
> - 1 PCI and 1 PCI-e USB 2.0 cards used for videograbbing
>
>
>
> Now i have tried to passthrough a third USB card, (PCI-e, USB 3.0 in this case), with a new pvops 2.6.31.12 kernel.
>
> But although i specified swiotlb=force, something seems to go wrong with DMA mapping, dmesg from the domU shows the error below.
> The complete dmesg output is attached.
Ugh. There is one more parameter you need to add, that is 'iommu=soft'.
That 'use swiotlb=force' nees to be fixed. Thanks for spotting it.
prev parent reply other threads:[~2010-03-22 19:10 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-11 10:44 [pvops-2.6.31.12 ]Fatal DMA error! Please use 'swiotlb=force' kernel BUG at drivers/pci/xen-iommu.c:227! invalid opcode: 0000 [#1] SMP Sander Eikelenboom
2010-03-11 20:35 ` Konrad Rzeszutek Wilk
2010-03-22 19:10 ` Konrad Rzeszutek Wilk [this message]
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