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Re: [Xen-devel] Re: [pvops xen/next ][iommu] attenpt to passthrough PCI-

from [Pasi Kärkkäinen] [Permanent Link][Original]
To: Jan Beulich <JBeulich@xxxxxxxxxx>
Subject: Re: [Xen-devel] Re: [pvops xen/next ][iommu] attenpt to passthrough PCI-e usb controllor to PV domU SUCCESS :-)
From: Pasi Kärkkäinen <pasik@xxxxxx>
Date: Tue, 23 Mar 2010 13:24:57 +0200
Cc: Sander Eikelenboom <linux@xxxxxxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
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On Tue, Mar 23, 2010 at 11:23:36AM +0000, Jan Beulich wrote:
> >>> Sander Eikelenboom <linux@xxxxxxxxxxxxxx> 23.03.10 11:23 >>>
> >How do these handle DMA related to the passthrough device in a PV-guest then 
> >?
> >From what i remember from previous (debian) xen kernels was that at least 
> >swiotlb=force was needed as kernel options to the domU kernel to passthrough 
> >usb-controllers.
> 
> Yes, exactly. But not "iommu=soft".
> 

Ok, I'll update the wiki.

-- Pasi


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