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diff --git a/openpower/sv/sprs.mdwn b/openpower/sv/sprs.mdwn
index 5f6ec1354d7d212e184db19e8cb66d1416057452..5ef833c111ee9db47a4c6d1c09dacf540d1835e7 100644 (file)
--- a/openpower/sv/sprs.mdwn
+++ b/openpower/sv/sprs.mdwn
@@ -10,6 +10,8 @@ There are five SPRs, available in any privilege level:
 * STATE (containing copies of MVL, VL and SUBVL as well as context information)
 * SVSRR0 which is used for exceptions and traps to store SVSTATE.
 
+MVL, VL and SUBVL are only provided for convenience: normally `setvl` would be used to obtain a copy of VL, for example.
+
 For Privilege Levels (trap handling) there are the following SPRs,
 where x may be u, s or h for User, Supervisor or Hypervisor
 Modes respectively: