u-boot.git/drivers/rng, branch v2024.01

rng: Add StarFive JH7110 RNG driver

2023-11-02T09:45:53Z

Adds to support JH7110 TRNG driver which is based on linux kernel's jh7110-trng.c. This can support to generate 256-bit random numbers and 128-bit but this makes 256-bit default for convenience. Signed-off-by: Chanho Park Reviewed-by: Leo Yu-Chi Liang

rng: Provide a RNG based on the RISC-V Zkr ISA extension

2023-11-02T08:22:06Z

The Zkr ISA extension (ratified Nov 2021) introduced the seed CSR. It provides an interface to a physical entropy source. A RNG driver based on the seed CSR is provided. It depends on mseccfg.sseed being set in the SBI firmware. Signed-off-by: Heinrich Schuchardt Reviewed-by: Leo Yu-Chi Liang

drivers: rng: add support for Meson S4

2023-10-13T09:30:42Z

For some Amlogic SOC's, mechanism to obtain random number has been changed. For example, S4 now uses status bit waiting algo. Signed-off-by: Alexey Romanov Reviewed-by: Neil Armstrong Link: https://lore.kernel.org/r/20231012075828.22685-2-avromanov@salutedevices.com Signed-off-by: Neil Armstrong

driver: rng: Add DM_RNG interface for ARMv8.5 RNDR registers

2023-10-11T17:22:32Z

The ARMv8.5 architecture extension defines architectural RNDR/RNDRRS system registers, that provide 64 bits worth of randomness on every read. Since it's an extension, and implementing it is optional, there is a field in the ID_AA64ISAR0_EL1 ID register to query the availability of those registers. Add a UCLASS_RNG driver that returns entropy via repeated reads from those system registers, if the extension is implemented. The driver always binds, but checks the availability in the probe() routine. This helps systems which suffer from low boot entropy, since U-Boot can provide entropy via the generic UEFI entropy gathering protocol to the OS, at an early stage. Signed-off-by: Andre Przywara Reviewed-by: Simon Glass

rng: stm32: Implement custom RNG configuration support

2023-10-04T11:26:03Z

STM32 RNG configuration should best fit the requirements of the platform. Therefore, put a platform-specific RNG configuration field in the platform data. Default RNG configuration for STM32MP13 is the NIST certified configuration [1]. While there, fix and the RNG init sequence to support all RNG versions. [1] https://csrc.nist.gov/projects/cryptographic-module-validation-program/entropy-validations/certificate/53 Signed-off-by: Gatien Chevallier Reviewed-by: Patrick Delaunay Reviewed-by: Patrice Chotard

rng: stm32: add error concealment sequence

2023-10-04T11:26:03Z

Seed errors can occur when using the hardware RNG. Implement the sequences to handle them. This avoids irrecoverable RNG state. Try to conceal seed errors when possible. If, despite the error concealing tries, a seed error is still present, then return an error. A clock error does not compromise the hardware block and data can still be read from RNG_DR. Just warn that the RNG clock is too slow and clear RNG_SR. Signed-off-by: Gatien Chevallier Reviewed-by: Patrick Delaunay Reviewed-by: Patrice Chotard

rng: stm32: add RNG clock frequency restraint

2023-10-04T11:26:03Z

In order to ensure a good RNG quality and compatibility with certified RNG configuration, add RNG clock frequency restraint. Signed-off-by: Gatien Chevallier Reviewed-by: Patrick Delaunay Reviewed-by: Patrice Chotard

rng: stm32: Implement configurable RNG clock error detection

2023-10-04T11:26:03Z

RNG clock error detection is now enabled if the "clock-error-detect" property is set in the device tree. Signed-off-by: Gatien Chevallier Reviewed-by: Patrick Delaunay Reviewed-by: Patrice Chotard

rng: stm32: rename STM32 RNG driver

2023-10-04T11:26:02Z

Rename the RNG driver as it is usable by other STM32 platforms than the STM32MP1x ones. Rename CONFIG_RNG_STM32MP1 to CONFIG_RNG_STM32 Signed-off-by: Gatien Chevallier Reviewed-by: Grzegorz Szymaszek Reviewed-by: Patrick Delaunay Reviewed-by: Patrice Chotard

rockchip: rng: add trngv1 for rk3588

2023-04-21T07:16:01Z

This adds support for the TRNG found in the RK3588 SoC to the rockchip_rng driver so that it can be used for things such as seeding randomness to Linux. Changes in V3: - Moved notes from commit to cover letter. - Added Reviewed-By tag. Changes in V2: - Modified Kconfig to note that the Rockchip RNG driver supports all versions of the hardware (v1, v2, and the trng in the rk3588). Signed-off-by: Lin Jinhan Signed-off-by: Chris Morgan Reviewed-by: Kever Yang