CONFIG_DEBUG_RCAR_GEN2_SCIFA2 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
Kernel low-level debugging messages via SCIFA2 on R8A7742
configname: CONFIG_DEBUG_RCAR_GEN2_SCIFA2
Kernel low-level debugging port
└─>Kernel low-level debugging messages via SCIFA2 on R8A7742
In linux kernel since version 5.1 (release Date: 2019-05-05)
Say Y here if you want kernel low-level debugging support
via SCIFA2 on Renesas RZ/G1H (R8A7742).
via SCIFA2 on Renesas RZ/G1H (R8A7742).