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