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zephyr/drivers/entropy/Kconfig.rv32m1

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kconfig: Fix up newly-introduced copy-pasted headers Same deal as in https://github.com/zephyrproject-rtos/zephyr/pull/20280, for newly-introduced stuff. Will avoid failures with the new CI test in https://github.com/zephyrproject-rtos/ci-tools/pull/112, though it only checks changed files. Also fix some un-indented properties on choices. Choice properties work the same as symbol properties syntactically. Signed-off-by: Ulf Magnusson <Ulf.Magnusson@nordicsemi.no>
2019-11-18 19:01:42 +08:00
# RV32M1 entropy generator driver configuration
drivers: entropy: add openisa/RV32M1 entropy driver Wrapper for openisa/RV32M1 TRNG driver Signed-off-by: George Stefan <george.stefan@nxp.com>
2019-04-08 23:12:40 +08:00
# Copyright 2019 NXP
# SPDX-License-Identifier: Apache-2.0
drivers: entropy: rv32m1: Turn pointless 'menuconfig' into 'config' Same deal as in commit 677f1e6 ("config: Turn pointless/confusing 'menuconfig's into 'config's"), for a newly introduced symbol. Also clean up a header to be consistent with recent cleanups. Signed-off-by: Ulf Magnusson <Ulf.Magnusson@nordicsemi.no>
2019-11-14 12:44:34 +08:00
config ENTROPY_RV32M1_TRNG
drivers: entropy: add openisa/RV32M1 entropy driver Wrapper for openisa/RV32M1 TRNG driver Signed-off-by: George Stefan <george.stefan@nxp.com>
2019-04-08 23:12:40 +08:00
bool "RV32M1 TRNG driver"
drivers: entropy: Update drivers to use devicetree Kconfig symbol Update entropy drivers to use DT_HAS_<compat>_ENABLED Kconfig symbol to expose the driver and enable it by default based on devicetree. We remove 'depend on' Kconfig for symbols that would be implied by the devicetree node existing. Signed-off-by: Kumar Gala <galak@kernel.org>
2022-07-22 14:40:12 +08:00
default y
depends on DT_HAS_OPENISA_RV32M1_TRNG_ENABLED
drivers: entropy: add openisa/RV32M1 entropy driver Wrapper for openisa/RV32M1 TRNG driver Signed-off-by: George Stefan <george.stefan@nxp.com>
2019-04-08 23:12:40 +08:00
select ENTROPY_HAS_DRIVER
help
This option enables the true random number generator (TRNG)
driver based on the RV32M1 TRNG driver.
boards: riscv: rv32m1: use xoroshiro as default RNG Don't use use the RV32M1 TRNG as a random source since it can be quite slow. Instead, use the software implemented xoroshiro RNG. Signed-off-by: David Leach <david.leach@nxp.com>
2019-09-19 18:19:55 +08:00
# Don't use use the RV32M1 TRNG as a random source since it can be quite slow.
random: deprecate `XOROSHIRO_RANDOM_GENERATOR` Deprecate the xoroshiro128+ PRNG algorithm in favour of xoshiro128++. xoshiro128++ is a drop-in replacement which is invisible from the user perspective. xoroshiro128+ is unsuitable because it is explicitly a floating-point PRNG, not a general-purpose PRNG. This means that the lower 4 bits of the output are actually linear, not random (from the designers, https://prng.di.unimi.it/). This means 1/8th of the generated data is not random. Additionally, xoroshiro128+ is not a 32bit algorithm, it operates on 64bit numbers. For the vast majority of Zephyr devices, this makes the PRNG slower than it needs to be. The replacement (xoshiro128++) is 32bit, with no loss in state space (still 128 bit). Signed-off-by: Jordan Yates <jordan.yates@data61.csiro.au>
2021-07-25 17:00:50 +08:00
# Instead, use the software implemented xoshiro RNG.
boards: riscv: rv32m1: use xoroshiro as default RNG Don't use use the RV32M1 TRNG as a random source since it can be quite slow. Instead, use the software implemented xoroshiro RNG. Signed-off-by: David Leach <david.leach@nxp.com>
2019-09-19 18:19:55 +08:00
choice RNG_GENERATOR_CHOICE
random: deprecate `XOROSHIRO_RANDOM_GENERATOR` Deprecate the xoroshiro128+ PRNG algorithm in favour of xoshiro128++. xoshiro128++ is a drop-in replacement which is invisible from the user perspective. xoroshiro128+ is unsuitable because it is explicitly a floating-point PRNG, not a general-purpose PRNG. This means that the lower 4 bits of the output are actually linear, not random (from the designers, https://prng.di.unimi.it/). This means 1/8th of the generated data is not random. Additionally, xoroshiro128+ is not a 32bit algorithm, it operates on 64bit numbers. For the vast majority of Zephyr devices, this makes the PRNG slower than it needs to be. The replacement (xoshiro128++) is 32bit, with no loss in state space (still 128 bit). Signed-off-by: Jordan Yates <jordan.yates@data61.csiro.au>
2021-07-25 17:00:50 +08:00
default XOSHIRO_RANDOM_GENERATOR if ENTROPY_RV32M1_TRNG
boards: riscv: rv32m1: use xoroshiro as default RNG Don't use use the RV32M1 TRNG as a random source since it can be quite slow. Instead, use the software implemented xoroshiro RNG. Signed-off-by: David Leach <david.leach@nxp.com>
2019-09-19 18:19:55 +08:00
endchoice