# Kconfig - random configuration options
#
# Copyright (c) 2017 Intel Corporation
#
# SPDX-License-Identifier: Apache-2.0
#

config TEST_RANDOM_GENERATOR
	bool "Non-random number generator"
	depends on !ENTROPY_HAS_DRIVER
	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
	depends on ENTROPY_HAS_DRIVER || TEST_RANDOM_GENERATOR

config X86_TSC_RANDOM_GENERATOR
	bool "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 "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 "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 "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