An earlier email sent today to this distribution incorrectly claimed
that dpdk-devbind.py was not working on Amazon Linux 2 Kernel 5.10.

This was my error. IOMMU was not turned on. I thought it default ON; it
does not even for c5n.metal instances.

The correct steps are:

* follow https://doc.dpdk.org/guides/nics/ena.html under "On AWS, the metal
instances are supporting IOMMU for both arm64 and x86_64 hosts" to
enable IOMMU by modifying grub boot file.

* follow instructions at
https://github.com/amzn/amzn-drivers/blob/master/userspace/dpdk/README.md

to update the vfio-pci driver.

dpdk-bind will then work:

Network devices using DPDK-compatible driver

============================================

0000:7f:00.0 'Elastic Network Adapter (ENA) ec20' drv=vfio-pci unused=ena