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# Kconfig - random configuration options
#
# Copyright (c) 2017 Intel Corporation
#
# SPDX-License-Identifier: Apache-2.0
#
config TEST_RANDOM_GENERATOR
bool
prompt "Non-random number generator"
depends on !ENTROPY_HAS_DRIVER
default n
help
This option signifies that the kernel's random number APIs are
permitted to return values that are not truly random.
This capability is provided for testing purposes, when a truly random
number generator is not available. The non-random number generator
should not be used in a production environment.
choice
prompt "Random generator"
default ENTROPY_DEVICE_RANDOM_GENERATOR
config X86_TSC_RANDOM_GENERATOR
bool
prompt "x86 timestamp counter based number generator"
depends on TEST_RANDOM_GENERATOR && X86
help
This options enables number generator based on timestamp counter
of x86 boards, obtained with rdtsc instruction.
config TIMER_RANDOM_GENERATOR
bool
prompt "System timer clock based number generator"
depends on TEST_RANDOM_GENERATOR
help
This options enables number generator based on system timer
clock. This number generator is not random and used for
testing only.
config ENTROPY_DEVICE_RANDOM_GENERATOR
bool
prompt "Use entropy driver to generate random numbers"
depends on ENTROPY_HAS_DRIVER
help
Enables a random number generator that uses the enabled
hardware entropy gathering driver to generate random
numbers.
config XOROSHIRO_RANDOM_GENERATOR
bool
prompt "Use Xoroshiro128+ as PRNG"
depends on ENTROPY_HAS_DRIVER
help
Enables the Xoroshiro128+ pseudo-random number generator, that
uses the entropy driver as a seed source. This is not a
cryptographically secure random number generator.
It is so named because it uses 128 bits of state.
endchoice