[BUG] LSU overflow (unused vaddr bits unequal) triggers ld/st access fault instead of page fault

Created by: michael-platzer

Is there an existing CVA6 bug for this?

• I have searched the existing bug issues

Bug Description

The LSU triggers an ld/st access fault in case of an overflow (i.e., when the unused upper bits of a virtual address are not equal).

https://github.com/openhwgroup/cva6/blob/89568b0c10f93b2040bb4d6b5c55d2ef6fee87db/core/load_store_unit.sv#L601-L605

However, the RISC-V privileged spec requires a page fault instead.