All recent AMD Turin BIOS builds support SDCI. It is recommended to update to the most recent release available. Not all OEM BIOS for AMD CPUs include SDCI yet, but work is progressing to achieve this. Contact your system or motherboard vendor for available BIOS updates.
To enable SDCI use the following option:
DF Common Options → SDCI = Enabled
The default value is “Automatic”, which typically is not sufficient.