Re: [Xen-users] pci passthrough with multiple devices

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Mon, 2012-08-06 at 19:44 +0100, Gabor Hudiczius wrote:
> Hi,
> 
> I'm trying to pass through 3 NICs to a domU, and i have some problems 
> with it
> I have hid the devices from the dom0 with the following kernel 
> parameter: xen-pciback.hide=(03:01.0)(06:01.0)(06:02.0)(06:1e.0)
> This does hide the devices from the dom0, and they show up as assignable 
> devices
> # xl pci-list-assignable-devices
> 0000:03:01.0
> 0000:06:01.0
> 0000:06:02.0
> 0000:06:1e.0
> 
> If at this moment i have a guest up and running, i can use the xl 
> pci-attach command to add the devices to the guest, and that way 
> everything works fine, lspci lists the network cards, and i can use them 
> - they work as they supposed to.
> However, when i try to add the devices via the domU config file (pci = [ 
> '03:01.0', '06:01.0', '06:02.0' ]), only the first device show up in the 
> guest (the order here doesn't matter, always the first device shows up). 
> Reviewing the guest's dmesg, i can't see anything about the other 
> devices, they don't show up in lspci, but they are no longer assignable 
> according to the dom0. I have to detach and reattach them with xl to be 
> able to use them in the guest.
> 
> What am i doing wrong?
> 
> Regards,
> Gabor Gudiczius
> 
> p.s.: i'm using gentoo with gentoo-sources 3.3.8 for both the dom0 and 
> the domU, pci backend and frontend drivers are compiled into the kernel

Which version of xen though?



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