18c2ecf20Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0 28c2ecf20Sopenharmony_ci/* 38c2ecf20Sopenharmony_ci * s390 arch random implementation. 48c2ecf20Sopenharmony_ci * 58c2ecf20Sopenharmony_ci * Copyright IBM Corp. 2017, 2020 68c2ecf20Sopenharmony_ci * Author(s): Harald Freudenberger 78c2ecf20Sopenharmony_ci */ 88c2ecf20Sopenharmony_ci 98c2ecf20Sopenharmony_ci#include <linux/kernel.h> 108c2ecf20Sopenharmony_ci#include <linux/atomic.h> 118c2ecf20Sopenharmony_ci#include <linux/random.h> 128c2ecf20Sopenharmony_ci#include <linux/static_key.h> 138c2ecf20Sopenharmony_ci#include <asm/cpacf.h> 148c2ecf20Sopenharmony_ci 158c2ecf20Sopenharmony_ciDEFINE_STATIC_KEY_FALSE(s390_arch_random_available); 168c2ecf20Sopenharmony_ci 178c2ecf20Sopenharmony_ciatomic64_t s390_arch_random_counter = ATOMIC64_INIT(0); 188c2ecf20Sopenharmony_ciEXPORT_SYMBOL(s390_arch_random_counter); 19