CONFIG_WAR_TX49XX_ICACHE_INDEX_INV is not available for thedefaultarchitecture x86.
Result is shown for architecture mips

CONFIG_WAR_TX49XX_ICACHE_INDEX_INV (not configurable)

configname: CONFIG_WAR_TX49XX_ICACHE_INDEX_INV

Linux Kernel Configuration
└─>Kernel type
└─>WAR_TX49XX_ICACHE_INDEX_INV
In linux kernel since version 5.1 (release Date: 2019-05-05)