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8dae77ac56
We must not use the pointer output without validating the success of the random read. Acked-by: Michael Ellerman <mpe@ellerman.id.au> Reviewed-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Mark Brown <broonie@kernel.org> Link: https://lore.kernel.org/r/20200110145422.49141-10-broonie@kernel.org Signed-off-by: Theodore Ts'o <tytso@mit.edu>
49 lines
1 KiB
C
49 lines
1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#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 bool __must_check arch_get_random_long(unsigned long *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_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 (ppc_md.get_random_seed)
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return ppc_md.get_random_seed(v);
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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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unsigned long val;
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bool rc;
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rc = arch_get_random_seed_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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#endif /* CONFIG_ARCH_RANDOM */
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#ifdef CONFIG_PPC_POWERNV
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int powernv_hwrng_present(void);
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int powernv_get_random_long(unsigned long *v);
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int powernv_get_random_real_mode(unsigned long *v);
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#else
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static inline int powernv_hwrng_present(void) { return 0; }
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static inline int powernv_get_random_real_mode(unsigned long *v) { return 0; }
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#endif
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#endif /* _ASM_POWERPC_ARCHRANDOM_H */
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