The RISC-V CPU architecture updates have landed for the in-development Linux 5.18 kernel.
Notable with the RISC-V additions for Linux 5.18 is sv57 support for 5-level page tables. It was just with the prior kernel that sv48 was added for 4-level page tables on RISC-V while this new kernel brings it up to 57-bit page-based virtual memory support for allowing RISC-V systems of the future with even greater memory capacities.