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random: Make RANDOM_TRUST_CPU depend on ARCH_RANDOM

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Listing the set of host architectures does not scale.
Depend instead on the existence of the architecture rng.

This will allow RANDOM_TRUST_CPU to be selected on arm64. Today
ARCH_RANDOM is only selected by x86, s390, and powerpc, so this does not
adversely affect other architectures.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20200210130015.17664-5-mark.rutland@arm.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Richard Henderson 2020-02-10 13:00:15 +00:00 committed by Theodore Ts'o
parent ead5084cdf
commit 23ae0c17b8
1 changed files with 1 additions and 1 deletions
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drivers/char/Kconfig
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@ -539,7 +539,7 @@ endmenu
config RANDOM_TRUST_CPU
bool "Trust the CPU manufacturer to initialize Linux's CRNG"
depends on X86 || S390 || PPC
depends on ARCH_RANDOM
default n
help
Assume that CPU manufacturer (e.g., Intel or AMD for RDSEED or