Re: [Xen-devel] Disable PCI passthrough FLR as an option?

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Mon, Dec 14, 2009 at 09:14:35PM +0800, Cui, Dexuan wrote:
> Actually we have such a xend option in the xen-unstable tree:
> The option is at the end of /etc/xen/xend-config.sxp: 
> (pci-passthrough-strict-check yes). Uncomment it and change it to no and do a 
> "xend restart".
>

Oh, nice. I didn't notice that earlier.
Hopefully this feature gets backported to xen-3.4-testing aswell.

-- Pasi

>  
> Thanks,
> -- Dexuan
> 
> -----Original Message-----
> From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx 
> [mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Pasi K?rkk?inen
> Sent: 2009???12???14??? 20:27
> To: xen-devel@xxxxxxxxxxxxxxxxxxx
> Subject: [Xen-devel] Disable PCI passthrough FLR as an option?
> 
> Hello,
> 
> People seem to want to pci-passthrough just a single port from dual-port
> NICs.
> 
> It doesn't seem to work anymore, and Xen complains like this:
> 
> http://lists.xensource.com/archives/html/xen-users/2009-12/msg00267.html
> 
> "Error: pci: improper device assignment specified: pci: 0000:04:00.0
> must be co-assigned to the same guest with 0000:04:00.1, but it is not
> owned by pciback."
> 
> With "disable FLR" patch it works OK:
> http://lists.xensource.com/archives/html/xen-users/2009-12/msg00338.html
> 
> That user is using the first port of the NIC in dom0, and passing
> through the second port to domU.
> 
> Can we have an option in Xen guest cfgfile to disable flr? 
> 
> -- Pasi
> 
> 
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