CONFIG_XILINX_MICROBLAZE0_USE_BARREL is not available for thedefaultarchitecture x86.
Result is shown for architecture microblaze

USE_BARREL range (0:1)

configname: CONFIG_XILINX_MICROBLAZE0_USE_BARREL

Linux Kernel Configuration
└─>Platform options
└─>USE_BARREL range (0:1)
In linux kernel since version 2.6.30 (release Date: 2009-06-09)