-a [[sv/setvl]] instruction is needed, which also implements [[sv/sprs]] i.e. primarily the `SVSTATE` SPR.
+a [[sv/setvl]] instruction is needed, which also implements [[sv/sprs]] i.e. primarily the `SVSTATE` SPR. the dual-access SPRs for VL and MVL which mirror into the SVSTATE.VL and SVSTATE.MVL fields are not immediately essential to implement.