GHASH

modulename: ghash-generic.ko

configname: CONFIG_CRYPTO_GHASH

Linux Kernel Configuration
└─>Cryptographic API
└─>Hashes, digests, and MACs
└─>GHASH
In linux kernel since version 2.6.32 (release Date: 2009-12-02)  
GCM GHASH function (NIST SP800-38D)

source code: