mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-23 19:14:30 +08:00
a4da0d50b2
Add the plumbing to implement arch_get_random_long/int(). It didn't seem worth adding an extra ppc_md hook for int, so we reuse the one for long. Add an implementation for powernv based on the hwrng found in power7+ systems. We whiten the output of the hwrng, and the result passes all the dieharder tests. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
33 lines
539 B
C
33 lines
539 B
C
#ifndef _ASM_POWERPC_ARCHRANDOM_H
|
|
#define _ASM_POWERPC_ARCHRANDOM_H
|
|
|
|
#ifdef CONFIG_ARCH_RANDOM
|
|
|
|
#include <asm/machdep.h>
|
|
|
|
static inline int arch_get_random_long(unsigned long *v)
|
|
{
|
|
if (ppc_md.get_random_long)
|
|
return ppc_md.get_random_long(v);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline int arch_get_random_int(unsigned int *v)
|
|
{
|
|
unsigned long val;
|
|
int rc;
|
|
|
|
rc = arch_get_random_long(&val);
|
|
if (rc)
|
|
*v = val;
|
|
|
|
return rc;
|
|
}
|
|
|
|
int powernv_get_random_long(unsigned long *v);
|
|
|
|
#endif /* CONFIG_ARCH_RANDOM */
|
|
|
|
#endif /* _ASM_POWERPC_ARCHRANDOM_H */
|