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| author | Michael Ellerman <michael@ellerman.id.au> | 2013-10-11 05:07:57 +0200 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-10-11 07:50:19 +0200 |
| commit | a4da0d50b2a00b79390092e6248ca88b7d93c81d (patch) | |
| tree | 4a481f28de594306b612938e037dd015114c2fd7 /arch/powerpc/include/asm/machdep.h | |
| parent | hwrng: Return errors to upper levels in pseries-rng.c (diff) | |
| download | linux-a4da0d50b2a00b79390092e6248ca88b7d93c81d.tar.xz linux-a4da0d50b2a00b79390092e6248ca88b7d93c81d.zip | |
powerpc: Implement arch_get_random_long/int() for powernv
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>
Diffstat (limited to 'arch/powerpc/include/asm/machdep.h')
| -rw-r--r-- | arch/powerpc/include/asm/machdep.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/machdep.h b/arch/powerpc/include/asm/machdep.h index 8b480901165a..ce6cc2a7b8b9 100644 --- a/arch/powerpc/include/asm/machdep.h +++ b/arch/powerpc/include/asm/machdep.h @@ -263,6 +263,10 @@ struct machdep_calls { ssize_t (*cpu_probe)(const char *, size_t); ssize_t (*cpu_release)(const char *, size_t); #endif + +#ifdef CONFIG_ARCH_RANDOM + int (*get_random_long)(unsigned long *v); +#endif }; extern void e500_idle(void); |