There is an issue with hypervisor host side mlx5 driver operation on Bluefield devices in kernels <=5.16 that was recently fixed in master with a one-liner:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7846665d3504812acaebf920d1141851379a7f37
It would be good to have this fix in Focal+ kernels.
This is not needed in https://bugs.launchpad.net/ubuntu/+source/linux-bluefield since it's used at the DPU side whereas the issue in question affects the hypervisor side.
There is an issue with hypervisor host side mlx5 driver operation on Bluefield devices in kernels <=5.16 that was recently fixed in master with a one-liner:
https:/ /git.kernel. org/pub/ scm/linux/ kernel/ git/torvalds/ linux.git/ commit/ ?id=7846665d350 4812acaebf920d1 141851379a7f37
It would be good to have this fix in Focal+ kernels.
This is not needed in https:/ /bugs.launchpad .net/ubuntu/ +source/ linux-bluefield since it's used at the DPU side whereas the issue in question affects the hypervisor side.