SHA1 digest algorithm

modulename: sha1_s390.ko

configname: CONFIG_CRYPTO_SHA1_S390

Linux Kernel Configuration
└─>Cryptographic API
└─>Hardware crypto devices
└─>SHA1 digest algorithm
In linux kernel since version 2.6.16 (release Date: 2006-03-19)  
This is the s390 hardware accelerated implementation of the
SHA-1 secure hash standard (FIPS 180-1/DFIPS 180-2).

It is available as of z990.

source code:
arch/s390/crypto/