How to set MSI-X IRQ channels for Intel 800-series iavf SR-IOV VFs

Solution Verified - Updated -

Issue

  • How to set MSI-X IRQ channels for Intel 800 series iavf SR-IOV VFs
  • Cannot set rss_lut_vf_attr with Intel 800 series ice and iavf drivers
  • Intel's driver readme advises this can be done like:
# echo 512 | sudo tee -a /sys/class/net/ens9f0/device/virtfn0/rss_lut_vf_attr
tee: /sys/class/net/ens9f0/device/virtfn0/rss_lut_vf_attr: Permission denied
  • Does Intel ice driver have the "Hypervisor Management Interface" feature?

Environment

  • Red Hat Enterprise Linux 9.4 and later
  • Intel 800 series (eg: E810) using ice driver
  • SR-IOV using iavf driver

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