As Pasi says it does work, I am using it to passthrough a nic. Out of your options only the xen-pciback.hide on the kernel command line was required for me, plus of course the config in the vm.cfg file.
In your xm dmesg does it show that the device was successfully hidden? What do you get from xm list-pci-assignable-devices? (sorry that may not be 100% accurate command it's something like that)
I did have issues with 1 quad port Gb pci-e card. It would hide correctly but the domU would not load it as an interface (I think now maybe because the domU was Lenny not tested that theory though).
Can give you some more detailed config tomorrow if required.
On 7 Sep 2010, at 18:19, Pasi Kärkkäinen <pasik@xxxxxx
> On Tue, Sep 07, 2010 at 12:22:24PM +0000, Meister Schieber wrote:
>> From: Mark Adams <mark@xxxxxxxxxxxxxxxxxx
>>> You should just use Squeeze (which is frozen now so on it's way to
>>> being the new stable). It works well simply by installing the
>>> xen-linux-system and xen-qemu-dm packages. It includes pciback.
>> Tried that for the last days, did not work either. The installation of
>> squeeze and xen 4.0 was very easy indeed, only the pci-passthru does not
>> work (tried 3 different computers with different hardware).
>> Regarding to http://wiki.xensource.com/xenwiki/XenPCIpassthrough
>> the options:
>> pciback.permissive pciback.hide=(09:00.0) pci=resource_alignment=09:00.0
>> xen-pciback.permissive xen-pciback.hide=(09:00.0)
>> combined with "swiotlb=force" and "iommu=soft swiotlb=force" in the DomU
>> (the "official" wiki has no special entries for the current release 4.0,
>> so I tried every combination...)
>> It just does not work, either the domU does not even start with some of
>> the options, or the domU starts but the nic does not come up.
>>> If you are so far into setup now that you want to stick with it, you
>>> could try the linux-image-2.6.32-5-xen-amd64 kernel from the debian
>> I am so far into several setups (plural) that I just does not want to give
>> up and switch to vmware, so I desperately ask again: Did anyone succeeded
>> in installing xen 4 on _any_ Debian version _and_ got a passed through NIC
>> working in the DomU?
> Yeah just yesterday someone was doing it.. and writing to ##xen on irc.
> What domU kernel are you using? Does it have xen-pcifront?
> What does "lspci" show in the domU?
> What pci related do you have in the domU dmesg?
> -- Pasi
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