CONFIG_XILINX_VIRTEX_4_FX is not available for thedefaultarchitecture x86.
Result is shown for architecture powerpc
default or selected kernelversion does not have config value CONFIG_XILINX_VIRTEX_4_FX.
Result is shown for kernelversion 6.9.9

CONFIG_XILINX_VIRTEX_4_FX (not configurable)

configname: CONFIG_XILINX_VIRTEX_4_FX

Linux Kernel Configuration
└─>XILINX_VIRTEX_4_FX
In linux kernel since version 2.6.20 (release Date: 2007-02-04)