mstatush Machine Status High The mstatus register tracks and controls the hart’s current operating state. Attributes CSR Address 0x310 Defining extension Sm, version >= 1.12 Length 32-bit Privilege Mode M Format Figure 1. mstatush 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.