forked from Minki/linux
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
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#define _ASM_POWERPC_ARCHRANDOM_H
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#ifdef CONFIG_ARCH_RANDOM
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#include <asm/machdep.h>
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static inline int arch_get_random_long(unsigned long *v)
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{
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if (ppc_md.get_random_long)
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return ppc_md.get_random_long(v);
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return 0;
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}
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static inline int arch_get_random_int(unsigned int *v)
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{
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unsigned long val;
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int rc;
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rc = arch_get_random_long(&val);
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if (rc)
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*v = val;
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return rc;
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}
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int powernv_get_random_long(unsigned long *v);
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#endif /* CONFIG_ARCH_RANDOM */
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#endif /* _ASM_POWERPC_ARCHRANDOM_H */
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