From the manual:
These registers are only initialized by a cold power-on reset. In this initialization state, all lock stepped processors in the system will have lockstep enabled. The lockstep function can only be disabled by the system initialization software writing a 0 to the LSEN bitfield. Application software cannot enable or disable the lockstep function.
The registers which are used to configure and enable CPU Lockstep Mode are only writeable by Infineon's start-up firmware and are configured from the BMI
See section 4.1.5.2 Configuration by Boot Mode Index (BMI) in the users manual.
Quote:
These registers are only initialized by a cold power-on reset. In this initialization state, all lock stepped processors in the system will have lockstep enabled. The lockstep function can only be disabled by the system initialization software writing a 0 to the LSEN bitfield. Application software cannot enable or disable the lockstep function.
The registers which are used to configure and enable CPU Lockstep Mode are only writeable by Infineon's start-up firmware and are configured from the BMI