XEN: Giving guest complete control over NIC(s).

[Gilboa Davara]

On Tue, 2006-06-20 at 09:19 -0700, list user wrote: 
> Gilboa Davara wrote:
> > Hello all,
> > 
> > I'm installing Xen on a machine with multiple Gbps NICs that I'm using
> > for driver development.
> > Is there a way to give the guest complete control over a number of these
> > NICs without having the host to route/bridge the traffic to the guest?
> 
> Yes.
> 
> 1) use "lspci" to determine which PCI slots the network cards occupy
> 2) Hide them from dom0:  in dom0's grub.conf add "pciback.hide(xx:yy.z)"
>     to the kernel boot parameters. e.g.
>       "module /vmlinuz-2.6.16-xen ro root=/dev/vg0/fc4 \
>       "pciback.hide=(aa:aa.a)(bb:bb.b)"
>     Multiple slots may be hidden by adding additional parentheticized
>     slot info.  *Don't use quotes* inside the parens.
> 3) give the selected pci slots to the domU by adding a corresponding
>     line to its config file: e.g into /etc/xen/vm1 add:
>       "pci = ['aa:aa.a','bb:bb.b']"
>      Multiple slots are given within the brackets, *separated by commas*,
>      *quotes are required* within the brackets.
> 
> As of 3.0.2 exported pci slots crash domUs when when trying to 
> automagically save/restore domUs using xendomains or the other tools. 
> They will require clean boots.
> 
> Hope that helps.
> 

Hello,

I've added the pciback.hide option but it doesn't seem to work.

[root at gilboa-home-srv gilboa]# cat /etc/grub.conf | grep xen0 -A2
title Fedora Core (2.6.16-1.2133_FC5xen0)
        root (hd0,0)
        kernel /xen.gz-2.6.16-1.2133_FC5
        module /vmlinuz-2.6.16-1.2133_FC5xen0 ro root=/dev/VolMD/LogFC5
rhgb quiet pciback.hide=(01:09.0)
        module /initrd-2.6.16-1.2133_FC5xen0.img
title Fedora Core (2.6.16-1.2133_FC5xenU)
        root (hd0,0)

[root at gilboa-home-srv gilboa]# dmesg | grep pci
Bootdata ok (command line is ro root=/dev/VolMD/LogFC5 rhgb quiet
pciback.hide=(01:09.0))
Kernel command line: ro root=/dev/VolMD/LogFC5 rhgb quiet
pciback.hide=(01:09.0)
Unknown boot option `pciback.hide=(01:09.0)': ignoring
ACPI: bus type pci registered
PCI: If a device doesn't work, try "pci=routeirq".  If it helps, post a
report
pcie_portdrv_probe->Dev[005d:10de] has invalid IRQ. Check vendor BIOS
Allocate Port Service[0000:00:0b.0:pcie00]
pcie_portdrv_probe->Dev[005d:10de] has invalid IRQ. Check vendor BIOS
Allocate Port Service[0000:00:0c.0:pcie00]
pcie_portdrv_probe->Dev[005d:10de] has invalid IRQ. Check vendor BIOS
Allocate Port Service[0000:00:0d.0:pcie00]
pcie_portdrv_probe->Dev[005d:10de] has invalid IRQ. Check vendor BIOS
Allocate Port Service[0000:00:0e.0:pcie00]

What am I missing?