s390/crypto/arch_random.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 /*
0003  * s390 arch random implementation.
0004  *
0005  * Copyright IBM Corp. 2017, 2020
0006  * Author(s): Harald Freudenberger
0007  */
0008
0009 #include <linux/kernel.h>
0010 #include <linux/atomic.h>
0011 #include <linux/random.h>
0012 #include <linux/static_key.h>
0013 #include <asm/cpacf.h>
0014
0015 DEFINE_STATIC_KEY_FALSE(s390_arch_random_available);
0016
0017 atomic64_t s390_arch_random_counter = ATOMIC64_INIT(0);
0018 EXPORT_SYMBOL(s390_arch_random_counter);