> 3. IOMMU support
>  /sys/kernel/iommu_groups/12/devices/0000:01:00.0
> /sys/kernel/iommu_groups/12/devices/0000:01:00.1
> /sys/kernel/iommu_groups/9/devices/0000:06:00.0
> /sys/kernel/iommu_groups/9/devices/0000:06:00.1

It's all because ports of your NICs are in the same iommu groups.
You need to patch your kernel to fix this behaviour or get another kernel.
Also, you may try to use UIO driver instead.

Best regards, Ilya Maximets.
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