mseccfgh Most significant 32 bits of Machine Security Configuration Machine Security Configuration Attributes Defining Extension * Sm, version >= 1.12 CSR Address 0x757 Length 32-bit Privilege Mode M Format Figure 1. mseccfgh format Field Summary Name Location Type Reset Value Fields This CSR has no fields. However, it must still exist (not cause an Illegal Instruction trap) and always return zero on a read.