GHASH digest algorithm

modulename: ghash_s390.ko

configname: CONFIG_CRYPTO_GHASH_S390

Linux Kernel Configuration
└─>Cryptographic API
└─>Hardware crypto devices
└─>GHASH digest algorithm
In linux kernel since version 3 (release Date: 2011-07-21)  
This is the s390 hardware accelerated implementation of the
GHASH message digest algorithm for GCM (Galois/Counter Mode).

It is available as of z196.

source code:
arch/s390/crypto/ghash_s390.c