CONFIG_CRYPTO_CHACHA20_X86_64 (not configurable)

modulename: chacha-x86_64.ko

configname: CONFIG_CRYPTO_CHACHA20_X86_64

Linux Kernel Configuration
└─>CRYPTO_CHACHA20_X86_64
In linux kernel since version 3.10 (release Date: 2013-06-30)  
source code: