64 lines
1.3 KiB
C
64 lines
1.3 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Kernel interface for the s390 arch_random_* functions
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*
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* Copyright IBM Corp. 2017
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*
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* Author: Harald Freudenberger <freude@de.ibm.com>
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*
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*/
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#ifndef _ASM_S390_ARCHRANDOM_H
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#define _ASM_S390_ARCHRANDOM_H
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#ifdef CONFIG_ARCH_RANDOM
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#include <linux/static_key.h>
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#include <linux/atomic.h>
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DECLARE_STATIC_KEY_FALSE(s390_arch_random_available);
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extern atomic64_t s390_arch_random_counter;
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bool s390_arch_random_generate(u8 *buf, unsigned int nbytes);
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static inline bool arch_has_random(void)
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{
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return false;
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}
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static inline bool arch_has_random_seed(void)
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{
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if (static_branch_likely(&s390_arch_random_available))
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return true;
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return false;
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}
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static inline bool arch_get_random_long(unsigned long *v)
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{
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return false;
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}
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static inline bool arch_get_random_int(unsigned int *v)
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{
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return false;
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}
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static inline bool arch_get_random_seed_long(unsigned long *v)
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{
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if (static_branch_likely(&s390_arch_random_available)) {
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return s390_arch_random_generate((u8 *)v, sizeof(*v));
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}
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return false;
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}
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static inline bool arch_get_random_seed_int(unsigned int *v)
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{
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if (static_branch_likely(&s390_arch_random_available)) {
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return s390_arch_random_generate((u8 *)v, sizeof(*v));
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}
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return false;
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}
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#endif /* CONFIG_ARCH_RANDOM */
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#endif /* _ASM_S390_ARCHRANDOM_H */
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