Xen devel - Mar 2012 - [question] PCI passthrough: when does Xen map device's BARs to guest?

Hi,

I checked the assign_device code path but seems only found IOMMU mapping 
table setup code in there. When does Xen map device''s BARs to guest? 
Where''s related code? Thanks.

-cody

Does anyone know this? Or it is not handled by Xen? Thanks for help.

-cody
On 03/08/2012 07:40 PM, cody wrote:
> Hi,
>
> I checked the assign_device code path but seems only found IOMMU 
> mapping table setup code in there. When does Xen map device''s BARs
to
> guest? Where''s related code? Thanks.
>
> -cody

Does anyone know this? Or it is not handled by Xen? Thanks for help.

-cody
On 03/08/2012 07:40 PM, cody wrote:
> Hi,
>
> I checked the assign_device code path but seems only found IOMMU 
> mapping table setup code in there. When does Xen map device''s BARs
to
> guest? Where''s related code? Thanks.
>
> -cody

It is handled by Xen eventually, but the caller is in qemu-dm. Please refer to
pass-through.c for your answer. Thanks!
Xiantao
> -----Original Message-----
> From: xen-devel-bounces@lists.xen.org [mailto:xen-devel-
> bounces@lists.xen.org] On Behalf Of cody
> Sent: Saturday, March 10, 2012 12:45 AM
> To: Xen-devel@lists.xensource.com
> Subject: Re: [Xen-devel] [question] PCI passthrough: when does Xen map
> device''s BARs to guest?
> 
> Does anyone know this? Or it is not handled by Xen? Thanks for help.
> 
> -cody
> On 03/08/2012 07:40 PM, cody wrote:
> > Hi,
> >
> > I checked the assign_device code path but seems only found IOMMU
> > mapping table setup code in there. When does Xen map device''s
BARs to
> > guest? Where''s related code? Thanks.
> >
> > -cody
> 
> 
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