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54 lines
1.3 KiB
54 lines
1.3 KiB
/* 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, 2020 |
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* |
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* Author: Harald Freudenberger <[email protected]> |
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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_get_random_long(unsigned long *v); |
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bool s390_arch_random_generate(u8 *buf, unsigned int nbytes); |
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static inline bool __must_check arch_get_random_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_get_random_long(v); |
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return false; |
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} |
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static inline bool __must_check 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 __must_check 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 __must_check 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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