It seems to be fsl_mc_bus at fault, but according to [0] the fix may require a new firmware, but upstream did not released new firmware for a while now [1]. [0]: https://community.solid-run.com/t/arm-smmu-context-faults-with-kernel-5-15-59/430 [1]: https://github.com/SolidRun/lx2160a_uefi