XEN NIC PASSTHRU FAILS

English Virtualization
1

I am Running LEAP 15.1

I have a Broadcom 4 port gigabit ethernet card installed I updated the 00-system config under modprob.d such that the card is configured as follows:

using lspci -k
…
01:00.0 Ethernet controller: Broadcom Limited NetXtreme BCM5719 Gigabit Ethernet PCIe (rev 01)
Subsystem: Broadcom Limited Device 1904
Kernel driver in use: pciback
Kernel modules: tg3
01:00.1 Ethernet controller: Broadcom Limited NetXtreme BCM5719 Gigabit Ethernet PCIe (rev 01)
Subsystem: Broadcom Limited Device 1904
Kernel driver in use: pciback
Kernel modules: tg3
01:00.2 Ethernet controller: Broadcom Limited NetXtreme BCM5719 Gigabit Ethernet PCIe (rev 01)
Subsystem: Broadcom Limited Device 1904
Kernel driver in use: pciback
Kernel modules: tg3
01:00.3 Ethernet controller: Broadcom Limited NetXtreme BCM5719 Gigabit Ethernet PCIe (rev 01)
Subsystem: Broadcom Limited Device 1904
Kernel driver in use: pciback
Kernel modules: tg3
…

xl shows as follows:

xl pci-assignable-list
0000:01:00.3
0000:01:00.2
0000:01:00.1
0000:01:00.0

I used the gui to assign the free pci device 0000:01:00.1, also tried xl pci-attach, in both cases the following results

xl pci-list jonasserver
Vdev Device
05.0 0000:01:00.1

ok now everything is fine until I actually attach an Ethernet cable. I have installed the XEN PV drivers 8.2.2 into my windows 2016 server
I have good performance on all things, I have a bridged network device which is working fine.
The nic shows up and the drivers install correctly I can configure the ip etc with no problem.

As soon as the ethernet cable is attached, windows blue screens with “IRQL NOT less or equal B57nd60a.sys”

I am not sure where to look to resolve this issue.

i added iommu=1 intel_iommu=on to the default grub line, Just in case

Any ideas where I should look to track down this problem, or In my uninformed way forgot to configure something?

Thanks for any help
Brian

2

The first question that has to be asked is what guide you are foloowing?
And, what might be your reasons for wanting to do a NIC pass through? Although possible, it’s a relatively unusual need.

TSU

3

I am trying to offload the main virtual server’s nic cards with one passed thru to this web server.

I am not sure which guide to follow!

4

Awhile back,
I posted to this forum the following which continues to be a good source for configuring hardware pass through for all virtualization technologies, and includes the Xen Wiki guide for PCI devices

https://forums.opensuse.org/showthread.php/524942-GPU-passthrough-Various-virtualization-technologies

Before you do this though,
What is your reason for wanting to configure a NIC pass through?
There are valid reasons but there are also wrong reasons.

TSU