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Thread: XEN NIC PASSTHRU FAILS

  1. #1
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    Question XEN NIC PASSTHRU FAILS

    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. #2
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    Default Re: XEN NIC PASSTHRU FAILS

    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.

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  3. #3
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    Default Re: XEN NIC PASSTHRU FAILS

    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. #4
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    Default Re: XEN NIC PASSTHRU FAILS

    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
    Beginner Wiki Quickstart - https://en.opensuse.org/User:Tsu2/Quickstart_Wiki
    Solved a problem recently? Create a wiki page for future personal reference!
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