Is anyone who knows about LinuxKPI able to check this? I don't have anything that uses it, but need to move the value for MTE.

For historic reasons register fields accessed via an EL1 register name we don't include _EL1. For EL2 registers we do as otherwise the name may not be unique.

That code probably needs to be updated, e.g. it's missing some ID registers

The function signatures for acpi_iort_lookup_its_from_iwb and acpi_iort_get_iwb_dev should be moved from D59169 to here

I created macros in D59147 & D59148 to use the SYS_ARG macro

Why not use the new SYS_ARG macro? The tlbi instructions are in the sys instruction space.

I'm afk for a week and a half

While here I think it would make sense to also handle this case in tag_check_abort, although I don't think we can currently hit it there (no tag checking in the kernel).