Re: [Xen-devel] kernel oops with driver domains: usb ohci Fatal

To:	Hans-Christian Armingeon <mog.johnny@xxxxxxx>
Subject:	Re: [Xen-devel] kernel oops with driver domains: usb ohci Fatal DMA error! Please use 'swiotlb=force'
From:	Muli Ben-Yehuda <muli@xxxxxxxxxx>
Date:	Mon, 1 May 2006 14:12:53 +0300
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On Fri, Apr 28, 2006 at 04:40:27PM +0200, Hans-Christian Armingeon wrote:
> Hi,
> 
> I am havong trouble exporting a pci device to a domU.
> The kernel oopses quite early at boot.
> 
> How can I fix this?

Try passing swiotlb=force on the command line.

> [509111.024333] Fatal DMA error! Please use 'swiotlb=force'
> [509111.024344] ----------- [cut here ] --------- [please bite here ] 
> ---------
> [509111.024347] Kernel BUG at 
> arch/x86_64/kernel/../../i386/kernel/pci-dma-xen.c:309

Cheers,
Muli

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