drivers/char/hw_random/Kconfig - third_party/linux - Git at Google


            
            # SPDX-License-Identifier: GPL-2.0-only

            
            #

            
            # Hardware Random Number Generator (RNG) configuration

            
            #


            menuconfig HW_RANDOM

            
            	tristate "Hardware Random Number Generator Core support"

            
            	default m

            
            	help

            
            	  Hardware Random Number Generator Core infrastructure.


            	  To compile this driver as a module, choose M here: the

            
            	  module will be called rng-core.  This provides a device

            
            	  that's usually called /dev/hwrng, and which exposes one

            
            	  of possibly several hardware random number generators.


            	  These hardware random number generators do feed into the

            
            	  kernel's random number generator entropy pool.


            	  If unsure, say Y.


            if HW_RANDOM


            config HW_RANDOM_TIMERIOMEM

            
            	tristate "Timer IOMEM HW Random Number Generator support"

            
            	depends on HAS_IOMEM

            
            	help

            
            	  This driver provides kernel-side support for a generic Random

            
            	  Number Generator used by reading a 'dumb' iomem address that

            
            	  is to be read no faster than, for example, once a second;

            
            	  the default FPGA bitstream on the TS-7800 has such functionality.


            	  To compile this driver as a module, choose M here: the

            
            	  module will be called timeriomem-rng.


            	  If unsure, say Y.


            config HW_RANDOM_INTEL

            
            	tristate "Intel HW Random Number Generator support"

            
            	depends on (X86 || COMPILE_TEST) && PCI

            
            	default HW_RANDOM

            
            	help

            
            	  This driver provides kernel-side support for the Random Number

            
            	  Generator hardware found on Intel i8xx-based motherboards.


            	  To compile this driver as a module, choose M here: the

            
            	  module will be called intel-rng.


            	  If unsure, say Y.


            config HW_RANDOM_AMD

            
            	tristate "AMD HW Random Number Generator support"

            
            	depends on (X86 || COMPILE_TEST)

            
            	depends on PCI && HAS_IOPORT_MAP

            
            	default HW_RANDOM

            
            	help

            
            	  This driver provides kernel-side support for the Random Number

            
            	  Generator hardware found on AMD 76x-based motherboards.


            	  To compile this driver as a module, choose M here: the

            
            	  module will be called amd-rng.


            	  If unsure, say Y.


            config HW_RANDOM_AIROHA

            
            	tristate "Airoha True HW Random Number Generator support"

            
            	depends on ARCH_AIROHA || COMPILE_TEST

            
            	default HW_RANDOM

            
            	help

            
            	  This driver provides kernel-side support for the True Random Number

            
            	  Generator hardware found on Airoha SoC.


            	  To compile this driver as a module, choose M here: the

            
            	  module will be called airoha-rng.


            	  If unsure, say Y.


            config HW_RANDOM_ATMEL

            
            	tristate "Atmel Random Number Generator support"

            
            	depends on (ARCH_MICROCHIP || COMPILE_TEST)

            
            	default HW_RANDOM

            
            	help

            
            	  This driver provides kernel-side support for the Random Number

            
            	  Generator hardware found on Atmel AT91 devices.


            	  To compile this driver as a module, choose M here: the

            
            	  module will be called atmel-rng.


            	  If unsure, say Y.


            config HW_RANDOM_BA431

            
            	tristate "Silex Insight BA431 Random Number Generator support"

            
            	depends on HAS_IOMEM

            
            	help

            
            	  This driver provides kernel-side support for the Random Number

            
            	  Generator hardware based on Silex Insight BA431 IP.


            	  To compile this driver as a module, choose M here: the

            
            	  module will be called ba431-rng.


            config HW_RANDOM_BCM2835

            
            	tristate "Broadcom BCM2835/BCM63xx Random Number Generator support"

            
            	depends on ARCH_BCM2835 || ARCH_BCM_NSP || ARCH_BCM_5301X || \

            
            		   ARCH_BCMBCA || BCM63XX || BMIPS_GENERIC || COMPILE_TEST

            
            	default HW_RANDOM

            
            	help

            
            	  This driver provides kernel-side support for the Random Number

            
            	  Generator hardware found on the Broadcom BCM2835 and BCM63xx SoCs.


            	  To compile this driver as a module, choose M here: the

            
            	  module will be called bcm2835-rng


            	  If unsure, say Y.


            config HW_RANDOM_BCM74110

            
            	tristate "Broadcom BCM74110 Random Number Generator support"

            
            	depends on ARCH_BRCMSTB || COMPILE_TEST

            
            	default HW_RANDOM

            
            	help

            
            	  This driver provides kernel-side support for the Random Number

            
            	  Generator hardware found on the Broadcom BCM74110 SoCs.


            	  To compile this driver as a module, choose M here: the

            
            	  module will be called bcm74110-rng


            	  If unsure, say Y.


            config HW_RANDOM_IPROC_RNG200

            
            	tristate "Broadcom iProc/STB RNG200 support"

            
            	depends on ARCH_BCM_IPROC || ARCH_BCM2835 || ARCH_BCMBCA || ARCH_BRCMSTB || COMPILE_TEST

            
            	default HW_RANDOM

            
            	help

            
            	  This driver provides kernel-side support for the RNG200

            
            	  hardware found on the Broadcom iProc and STB SoCs.


            	  To compile this driver as a module, choose M here: the

            
            	  module will be called iproc-rng200


            	  If unsure, say Y.


            config HW_RANDOM_GEODE

            
            	tristate "AMD Geode HW Random Number Generator support"

            
            	depends on (X86_32 || COMPILE_TEST)

            
            	depends on PCI

            
            	default HW_RANDOM

            
            	help

            
            	  This driver provides kernel-side support for the Random Number

            
            	  Generator hardware found on the AMD Geode LX.


            	  To compile this driver as a module, choose M here: the

            
            	  module will be called geode-rng.


            	  If unsure, say Y.


            config HW_RANDOM_N2RNG

            
            	tristate "Niagara2 Random Number Generator support"

            
            	depends on SPARC64

            
            	default HW_RANDOM

            
            	help

            
            	  This driver provides kernel-side support for the Random Number

            
            	  Generator hardware found on Niagara2 cpus.


            	  To compile this driver as a module, choose M here: the

            
            	  module will be called n2-rng.


            	  If unsure, say Y.


            config HW_RANDOM_VIA

            
            	tristate "VIA HW Random Number Generator support"

            
            	depends on X86

            
            	default HW_RANDOM

            
            	help

            
            	  This driver provides kernel-side support for the Random Number

            
            	  Generator hardware found on VIA based motherboards.


            	  To compile this driver as a module, choose M here: the

            
            	  module will be called via-rng.


            	  If unsure, say Y.


            config HW_RANDOM_IXP4XX

            
            	tristate "Intel IXP4xx NPU HW Pseudo-Random Number Generator support"

            
            	depends on ARCH_IXP4XX || COMPILE_TEST

            
            	default HW_RANDOM

            
            	help

            
            	  This driver provides kernel-side support for the Pseudo-Random

            
            	  Number Generator hardware found on the Intel IXP45x/46x NPU.


            	  To compile this driver as a module, choose M here: the

            
            	  module will be called ixp4xx-rng.


            	  If unsure, say Y.


            config HW_RANDOM_OMAP

            
            	tristate "OMAP Random Number Generator support"

            
            	depends on ARCH_OMAP16XX || ARCH_OMAP2PLUS || ARCH_MVEBU || ARCH_K3 || ARCH_RZN1 || COMPILE_TEST

            
            	default HW_RANDOM

            
            	help

            
            	  This driver provides kernel-side support for the Random Number

            
            	  Generator hardware found on OMAP16xx, OMAP2/3/4/5, AM33xx/AM43xx

            
            	  multimedia processors, and Marvell Armada 7k/8k SoCs.


            	  To compile this driver as a module, choose M here: the

            
            	  module will be called omap-rng.


            	  If unsure, say Y.


            config HW_RANDOM_OMAP3_ROM

            
            	tristate "OMAP3 ROM Random Number Generator support"

            
            	depends on ARCH_OMAP3 || COMPILE_TEST

            
            	default HW_RANDOM

            
            	help

            
            	  This driver provides kernel-side support for the Random Number

            
            	  Generator hardware found on OMAP34xx processors.


            	  To compile this driver as a module, choose M here: the

            
            	  module will be called omap3-rom-rng.


            	  If unsure, say Y.


            config HW_RANDOM_OCTEON

            
            	tristate "Octeon Random Number Generator support"

            
            	depends on CAVIUM_OCTEON_SOC

            
            	default HW_RANDOM

            
            	help

            
            	  This driver provides kernel-side support for the Random Number

            
            	  Generator hardware found on Octeon processors.


            	  To compile this driver as a module, choose M here: the

            
            	  module will be called octeon-rng.


            	  If unsure, say Y.


            config HW_RANDOM_PASEMI

            
            	tristate "PA Semi HW Random Number Generator support"

            
            	depends on PPC_PASEMI || (PPC && COMPILE_TEST)

            
            	default HW_RANDOM

            
            	help

            
            	  This driver provides kernel-side support for the Random Number

            
            	  Generator hardware found on PA Semi PWRficient SoCs.


            	  To compile this driver as a module, choose M here: the

            
            	  module will be called pasemi-rng.


            	  If unsure, say Y.


            config HW_RANDOM_VIRTIO

            
            	tristate "VirtIO Random Number Generator support"

            
            	depends on VIRTIO

            
            	help

            
            	  This driver provides kernel-side support for the virtual Random Number

            
            	  Generator hardware.


            	  To compile this driver as a module, choose M here: the

            
            	  module will be called virtio-rng.  If unsure, say N.


            config HW_RANDOM_MXC_RNGA

            
            	tristate "Freescale i.MX RNGA Random Number Generator"

            
            	depends on SOC_IMX31 || COMPILE_TEST

            
            	default HW_RANDOM

            
            	help

            
            	  This driver provides kernel-side support for the Random Number

            
            	  Generator hardware found on Freescale i.MX processors.


            	  To compile this driver as a module, choose M here: the

            
            	  module will be called mxc-rnga.


            	  If unsure, say Y.


            config HW_RANDOM_IMX_RNGC

            
            	tristate "Freescale i.MX RNGC Random Number Generator"

            
            	depends on HAS_IOMEM

            
            	depends on SOC_IMX25 || SOC_IMX6SL || SOC_IMX6SLL || SOC_IMX6UL || COMPILE_TEST

            
            	default HW_RANDOM

            
            	help

            
            	  This driver provides kernel-side support for the Random Number

            
            	  Generator Version C hardware found on some Freescale i.MX

            
            	  processors. Version B is also supported by this driver.


            	  To compile this driver as a module, choose M here: the

            
            	  module will be called imx-rngc.


            	  If unsure, say Y.


            config HW_RANDOM_INGENIC_RNG

            
            	tristate "Ingenic Random Number Generator support"

            
            	depends on MACH_JZ4780 || MACH_X1000 || COMPILE_TEST

            
            	default HW_RANDOM

            
            	help

            
            	  This driver provides kernel-side support for the Random Number Generator

            
            	  hardware found in ingenic JZ4780 and X1000 SoC. MIPS Creator CI20 uses

            
            	  JZ4780 SoC, YSH & ATIL CU1000-Neo uses X1000 SoC.


            	  To compile this driver as a module, choose M here: the

            
            	  module will be called ingenic-rng.


            	  If unsure, say Y.


            config HW_RANDOM_INGENIC_TRNG

            
            	tristate "Ingenic True Random Number Generator support"

            
            	depends on MACH_X1830 || COMPILE_TEST

            
            	default HW_RANDOM

            
            	help

            
            	  This driver provides kernel-side support for the True Random Number Generator

            
            	  hardware found in ingenic X1830 SoC. YSH & ATIL CU1830-Neo uses X1830 SoC.


            	  To compile this driver as a module, choose M here: the

            
            	  module will be called ingenic-trng.


            	  If unsure, say Y.


            config HW_RANDOM_NOMADIK

            
            	tristate "ST-Ericsson Nomadik Random Number Generator support"

            
            	depends on ARCH_NOMADIK || COMPILE_TEST

            
            	depends on ARM_AMBA

            
            	default HW_RANDOM

            
            	help

            
            	  This driver provides kernel-side support for the Random Number

            
            	  Generator hardware found on ST-Ericsson SoCs (8815 and 8500).


            	  To compile this driver as a module, choose M here: the

            
            	  module will be called nomadik-rng.


            	  If unsure, say Y.


            config HW_RANDOM_PSERIES

            
            	tristate "pSeries HW Random Number Generator support"

            
            	depends on PPC64 && IBMVIO

            
            	default HW_RANDOM

            
            	help

            
            	  This driver provides kernel-side support for the Random Number

            
            	  Generator hardware found on POWER7+ machines and above


            	  To compile this driver as a module, choose M here: the

            
            	  module will be called pseries-rng.


            	  If unsure, say Y.


            config HW_RANDOM_POWERNV

            
            	tristate "PowerNV Random Number Generator support"

            
            	depends on PPC_POWERNV

            
            	default HW_RANDOM

            
            	help

            
            	  This is the driver for Random Number Generator hardware found

            
            	  in POWER7+ and above machines for PowerNV platform.


            	  To compile this driver as a module, choose M here: the

            
            	  module will be called powernv-rng.


            	  If unsure, say Y.


            config HW_RANDOM_HISI

            
            	tristate "Hisilicon Random Number Generator support"

            
            	depends on ARCH_HISI || COMPILE_TEST

            
            	default HW_RANDOM

            
            	help

            
            	  This driver provides kernel-side support for the Random Number

            
            	  Generator hardware found on Hisilicon Hip04 and Hip05 SoC.


            	  To compile this driver as a module, choose M here: the

            
            	  module will be called hisi-rng.


            	  If unsure, say Y.


            config HW_RANDOM_HISTB

            
            	tristate "Hisilicon STB Random Number Generator support"

            
            	depends on ARCH_HISI || COMPILE_TEST

            
            	default ARCH_HISI

            
            	help

            
            	  This driver provides kernel-side support for the Random Number

            
            	  Generator hardware found on Hisilicon Hi37xx SoC.


            	  To compile this driver as a module, choose M here: the

            
            	  module will be called histb-rng.


            config HW_RANDOM_HISI_TRNG

            
            	tristate "HiSilicon True Random Number Generator support"

            
            	depends on ARM64 && ACPI

            
            	help

            
            	  This driver provides kernel-side support for the True Random Number

            
            	  Generator hardware found on some HiSilicon SoCs.


            	  To compile this driver as a module, choose M here: the module will be

            
            	  called hisi-trng-v2.


            config HW_RANDOM_ST

            
            	tristate "ST Microelectronics HW Random Number Generator support"

            
            	depends on ARCH_STI || COMPILE_TEST

            
            	help

            
            	  This driver provides kernel-side support for the Random Number

            
            	  Generator hardware found on STi series of SoCs.


            	  To compile this driver as a module, choose M here: the

            
            	  module will be called st-rng.


            config HW_RANDOM_XGENE

            
            	tristate "APM X-Gene True Random Number Generator (TRNG) support"

            
            	depends on ARCH_XGENE || COMPILE_TEST

            
            	default HW_RANDOM

            
            	help

            
            	  This driver provides kernel-side support for the Random Number

            
            	  Generator hardware found on APM X-Gene SoC.


            	  To compile this driver as a module, choose M here: the

            
            	  module will be called xgene_rng.


            	  If unsure, say Y.


            config HW_RANDOM_STM32

            
            	tristate "STMicroelectronics STM32 random number generator"

            
            	depends on ARCH_STM32 || COMPILE_TEST

            
            	depends on HAS_IOMEM

            
            	default HW_RANDOM

            
            	help

            
            	  This driver provides kernel-side support for the Random Number

            
            	  Generator hardware found on STM32 microcontrollers.


            	  To compile this driver as a module, choose M here: the

            
            	  module will be called stm32-rng.


            	  If unsure, say N.


            config HW_RANDOM_PIC32

            
            	tristate "Microchip PIC32 Random Number Generator support"

            
            	depends on MACH_PIC32 || COMPILE_TEST

            
            	default HW_RANDOM if MACH_PIC32

            
            	help

            
            	  This driver provides kernel-side support for the Random Number

            
            	  Generator hardware found on a PIC32.


            	  To compile this driver as a module, choose M here. the

            
            	  module will be called pic32-rng.


            	  If unsure, say Y.


            config HW_RANDOM_POLARFIRE_SOC

            
            	tristate "Microchip PolarFire SoC Random Number Generator support"

            
            	depends on HW_RANDOM && POLARFIRE_SOC_SYS_CTRL

            
            	help

            
            	  This driver provides kernel-side support for the Random Number

            
            	  Generator hardware found on PolarFire SoC (MPFS).


            	  To compile this driver as a module, choose M here. The

            
            	  module will be called mfps_rng.


            	  If unsure, say N.


            config HW_RANDOM_MESON

            
            	tristate "Amlogic Meson Random Number Generator support"

            
            	depends on ARCH_MESON || COMPILE_TEST

            
            	depends on HAS_IOMEM && OF

            
            	default HW_RANDOM if ARCH_MESON

            
            	help

            
            	  This driver provides kernel-side support for the Random Number

            
            	  Generator hardware found on Amlogic Meson SoCs.


            	  To compile this driver as a module, choose M here. the

            
            	  module will be called meson-rng.


            	  If unsure, say Y.


            config HW_RANDOM_CAVIUM

            
            	tristate "Cavium ThunderX Random Number Generator support"

            
            	depends on PCI

            
            	depends on ARCH_THUNDER || (ARM64 && COMPILE_TEST)

            
            	default HW_RANDOM

            
            	help

            
            	  This driver provides kernel-side support for the Random Number

            
            	  Generator hardware found on Cavium SoCs.


            	  To compile this driver as a module, choose M here: the

            
            	  module will be called cavium_rng.


            	  If unsure, say Y.


            config HW_RANDOM_MTK

            
            	tristate "Mediatek Random Number Generator support"

            
            	depends on ARCH_MEDIATEK || COMPILE_TEST

            
            	depends on HAS_IOMEM && OF

            
            	default HW_RANDOM if ARCH_MEDIATEK

            
            	help

            
            	  This driver provides kernel-side support for the Random Number

            
            	  Generator hardware found on Mediatek SoCs.


            	  To compile this driver as a module, choose M here. the

            
            	  module will be called mtk-rng.


            	  If unsure, say Y.


            config HW_RANDOM_S390

            
            	tristate "S390 True Random Number Generator support"

            
            	depends on S390

            
            	default HW_RANDOM

            
            	help

            
            	  This driver provides kernel-side support for the True

            
            	  Random Number Generator available as CPACF extension

            
            	  on modern s390 hardware platforms.


            	  To compile this driver as a module, choose M here: the

            
            	  module will be called s390-trng.


            	  If unsure, say Y.


            config HW_RANDOM_EXYNOS

            
            	tristate "Samsung Exynos True Random Number Generator support"

            
            	depends on ARCH_EXYNOS || COMPILE_TEST

            
            	depends on HAS_IOMEM

            
            	default HW_RANDOM if ARCH_EXYNOS

            
            	help

            
            	  This driver provides support for the True Random Number

            
            	  Generator available in Exynos SoCs.


            	  To compile this driver as a module, choose M here: the module

            
            	  will be called exynos-trng.


            	  If unsure, say Y.


            config HW_RANDOM_OPTEE

            
            	tristate "OP-TEE based Random Number Generator support"

            
            	depends on OPTEE

            
            	default HW_RANDOM

            
            	help

            
            	  This  driver provides support for OP-TEE based Random Number

            
            	  Generator on ARM SoCs where hardware entropy sources are not

            
            	  accessible to normal world (Linux).


            	  To compile this driver as a module, choose M here: the module

            
            	  will be called optee-rng.


            	  If unsure, say Y.


            config HW_RANDOM_NPCM

            
            	tristate "NPCM Random Number Generator support"

            
            	depends on ARCH_NPCM || COMPILE_TEST

            
            	depends on HAS_IOMEM

            
            	default HW_RANDOM if ARCH_NPCM

            
            	help

            
            	  This driver provides support for the Random Number

            
            	  Generator hardware available in Nuvoton NPCM SoCs.


            	  To compile this driver as a module, choose M here: the

            
            	  module will be called npcm-rng.


            	  If unsure, say Y.


            config HW_RANDOM_KEYSTONE

            
            	tristate "TI Keystone NETCP SA Hardware random number generator"

            
            	depends on ARCH_KEYSTONE || COMPILE_TEST

            
            	depends on HAS_IOMEM && OF

            
            	default HW_RANDOM

            
            	help

            
            	  This option enables Keystone's hardware random generator.


            config HW_RANDOM_CCTRNG

            
            	tristate "Arm CryptoCell True Random Number Generator support"

            
            	depends on HAS_IOMEM && OF

            
            	help

            
            	  Say 'Y' to enable the True Random Number Generator driver for the

            
            	  Arm TrustZone CryptoCell family of processors.

            
            	  Currently the CryptoCell 713 and 703 are supported.

            
            	  The driver is supported only in SoC where Trusted Execution

            
            	  Environment is not used.

            
            	  Choose 'M' to compile this driver as a module. The module

            
            	  will be called cctrng.

            
            	  If unsure, say 'N'.


            config HW_RANDOM_XIPHERA

            
            	tristate "Xiphera FPGA based True Random Number Generator support"

            
            	depends on HAS_IOMEM

            
            	help

            
            	  This driver provides kernel-side support for Xiphera True Random

            
            	  Number Generator Intellectual Property Core.


            	  To compile this driver as a module, choose M here: the

            
            	  module will be called xiphera-trng.


            config HW_RANDOM_ARM_SMCCC_TRNG

            
            	tristate "Arm SMCCC TRNG firmware interface support"

            
            	depends on HAVE_ARM_SMCCC_DISCOVERY

            
            	default HW_RANDOM

            
            	help

            
            	  Say 'Y' to enable the True Random Number Generator driver using

            
            	  the Arm SMCCC TRNG firmware interface. This reads entropy from

            
            	  higher exception levels (firmware, hypervisor). Uses SMCCC for

            
            	  communicating with the firmware:

            
            	  https://developer.arm.com/documentation/den0098/latest/


            	  To compile this driver as a module, choose M here: the

            
            	  module will be called arm_smccc_trng.


            config HW_RANDOM_CN10K

            
            	tristate "Marvell CN10K Random Number Generator support"

            
            	depends on HW_RANDOM && PCI && (ARM64 || (64BIT && COMPILE_TEST))

            
            	default HW_RANDOM if ARCH_THUNDER

            
            	help

            
            	  This driver provides support for the True Random Number

            
            	  generator available in Marvell CN10K SoCs.


            	  To compile this driver as a module, choose M here.

            
            	  The module will be called cn10k_rng. If unsure, say Y.


            config HW_RANDOM_JH7110

            
            	tristate "StarFive JH7110 Random Number Generator support"

            
            	depends on SOC_STARFIVE || COMPILE_TEST

            
            	help

            
            	  This driver provides support for the True Random Number

            
            	  Generator in StarFive JH7110 SoCs.


            	  To compile this driver as a module, choose M here.

            
            	  The module will be called jh7110-trng.


            config HW_RANDOM_ROCKCHIP

            
            	tristate "Rockchip True Random Number Generator"

            
            	depends on HW_RANDOM && (ARCH_ROCKCHIP || COMPILE_TEST)

            
            	depends on HAS_IOMEM

            
            	default HW_RANDOM

            
            	help

            
            	  This driver provides kernel-side support for the True Random Number

            
            	  Generator hardware found on some Rockchip SoCs like RK3566, RK3568

            
            	  or RK3588.


            	  To compile this driver as a module, choose M here: the

            
            	  module will be called rockchip-rng.


            	  If unsure, say Y.


            config HW_RANDOM_XILINX

            
            	tristate "Support for Xilinx True Random Generator"

            
            	depends on ZYNQMP_FIRMWARE || COMPILE_TEST

            
            	select CRYPTO_LIB_SHA512

            
            	help

            
            	  Xilinx Versal SoC driver provides kernel-side support for True Random Number

            
            	  Generator and Pseudo random Number in CTR_DRBG mode as defined in NIST SP800-90A.


            	  To compile this driver as a module, choose M here: the module

            
            	  will be called xilinx-trng.


            config HW_RANDOM_QCOM

            
            	tristate "Qualcomm True Random Number Generator Driver"

            
            	depends on ARCH_QCOM || COMPILE_TEST

            
            	depends on HW_RANDOM

            
            	help

            
            	  This driver provides support for the True Random Number

            
            	  Generator hardware found on some Qualcomm SoCs.


            	  To compile this driver as a module, choose M here. The

            
            	  module will be called qcom-rng. If unsure, say N.


            endif # HW_RANDOM


            config UML_RANDOM

            
            	depends on UML

            
            	select HW_RANDOM

            
            	tristate "UML Random Number Generator support"

            
            	help

            
            	  This option enables UML's "hardware" random number generator.  It

            
            	  attaches itself to the host's /dev/random, supplying as much entropy

            
            	  as the host has, rather than the small amount the UML gets from its

            
            	  own drivers. It registers itself as a rng-core driver thus providing

            
            	  a device which is usually called /dev/hwrng. This hardware random

            
            	  number generator does feed into the kernel's random number generator

            
            	  entropy pool.


            	  If unsure, say Y.
	# SPDX-License-Identifier: GPL-2.0-only
	#
	# Hardware Random Number Generator (RNG) configuration
	#

	menuconfig HW_RANDOM
	tristate "Hardware Random Number Generator Core support"
	default m
	help
	Hardware Random Number Generator Core infrastructure.

	To compile this driver as a module, choose M here: the
	module will be called rng-core. This provides a device
	that's usually called /dev/hwrng, and which exposes one
	of possibly several hardware random number generators.

	These hardware random number generators do feed into the
	kernel's random number generator entropy pool.

	If unsure, say Y.

	if HW_RANDOM

	config HW_RANDOM_TIMERIOMEM
	tristate "Timer IOMEM HW Random Number Generator support"
	depends on HAS_IOMEM
	help
	This driver provides kernel-side support for a generic Random
	Number Generator used by reading a 'dumb' iomem address that
	is to be read no faster than, for example, once a second;
	the default FPGA bitstream on the TS-7800 has such functionality.

	To compile this driver as a module, choose M here: the
	module will be called timeriomem-rng.

	If unsure, say Y.

	config HW_RANDOM_INTEL
	tristate "Intel HW Random Number Generator support"
	depends on (X86 \|\| COMPILE_TEST) && PCI
	default HW_RANDOM
	help
	This driver provides kernel-side support for the Random Number
	Generator hardware found on Intel i8xx-based motherboards.

	To compile this driver as a module, choose M here: the
	module will be called intel-rng.

	If unsure, say Y.

	config HW_RANDOM_AMD
	tristate "AMD HW Random Number Generator support"
	depends on (X86 \|\| COMPILE_TEST)
	depends on PCI && HAS_IOPORT_MAP
	default HW_RANDOM
	help
	This driver provides kernel-side support for the Random Number
	Generator hardware found on AMD 76x-based motherboards.

	To compile this driver as a module, choose M here: the
	module will be called amd-rng.

	If unsure, say Y.

	config HW_RANDOM_AIROHA
	tristate "Airoha True HW Random Number Generator support"
	depends on ARCH_AIROHA \|\| COMPILE_TEST
	default HW_RANDOM
	help
	This driver provides kernel-side support for the True Random Number
	Generator hardware found on Airoha SoC.

	To compile this driver as a module, choose M here: the
	module will be called airoha-rng.

	If unsure, say Y.

	config HW_RANDOM_ATMEL
	tristate "Atmel Random Number Generator support"
	depends on (ARCH_MICROCHIP \|\| COMPILE_TEST)
	default HW_RANDOM
	help
	This driver provides kernel-side support for the Random Number
	Generator hardware found on Atmel AT91 devices.

	To compile this driver as a module, choose M here: the
	module will be called atmel-rng.

	If unsure, say Y.

	config HW_RANDOM_BA431
	tristate "Silex Insight BA431 Random Number Generator support"
	depends on HAS_IOMEM
	help
	This driver provides kernel-side support for the Random Number
	Generator hardware based on Silex Insight BA431 IP.

	To compile this driver as a module, choose M here: the
	module will be called ba431-rng.

	config HW_RANDOM_BCM2835
	tristate "Broadcom BCM2835/BCM63xx Random Number Generator support"
	depends on ARCH_BCM2835 \|\| ARCH_BCM_NSP \|\| ARCH_BCM_5301X \|\| \
	ARCH_BCMBCA \|\| BCM63XX \|\| BMIPS_GENERIC \|\| COMPILE_TEST
	default HW_RANDOM
	help
	This driver provides kernel-side support for the Random Number
	Generator hardware found on the Broadcom BCM2835 and BCM63xx SoCs.

	To compile this driver as a module, choose M here: the
	module will be called bcm2835-rng

	If unsure, say Y.

	config HW_RANDOM_BCM74110
	tristate "Broadcom BCM74110 Random Number Generator support"
	depends on ARCH_BRCMSTB \|\| COMPILE_TEST
	default HW_RANDOM
	help
	This driver provides kernel-side support for the Random Number
	Generator hardware found on the Broadcom BCM74110 SoCs.

	To compile this driver as a module, choose M here: the
	module will be called bcm74110-rng

	If unsure, say Y.

	config HW_RANDOM_IPROC_RNG200
	tristate "Broadcom iProc/STB RNG200 support"
	depends on ARCH_BCM_IPROC \|\| ARCH_BCM2835 \|\| ARCH_BCMBCA \|\| ARCH_BRCMSTB \|\| COMPILE_TEST
	default HW_RANDOM
	help
	This driver provides kernel-side support for the RNG200
	hardware found on the Broadcom iProc and STB SoCs.

	To compile this driver as a module, choose M here: the
	module will be called iproc-rng200

	If unsure, say Y.

	config HW_RANDOM_GEODE
	tristate "AMD Geode HW Random Number Generator support"
	depends on (X86_32 \|\| COMPILE_TEST)
	depends on PCI
	default HW_RANDOM
	help
	This driver provides kernel-side support for the Random Number
	Generator hardware found on the AMD Geode LX.

	To compile this driver as a module, choose M here: the
	module will be called geode-rng.

	If unsure, say Y.

	config HW_RANDOM_N2RNG
	tristate "Niagara2 Random Number Generator support"
	depends on SPARC64
	default HW_RANDOM
	help
	This driver provides kernel-side support for the Random Number
	Generator hardware found on Niagara2 cpus.

	To compile this driver as a module, choose M here: the
	module will be called n2-rng.

	If unsure, say Y.

	config HW_RANDOM_VIA
	tristate "VIA HW Random Number Generator support"
	depends on X86
	default HW_RANDOM
	help
	This driver provides kernel-side support for the Random Number
	Generator hardware found on VIA based motherboards.

	To compile this driver as a module, choose M here: the
	module will be called via-rng.

	If unsure, say Y.

	config HW_RANDOM_IXP4XX
	tristate "Intel IXP4xx NPU HW Pseudo-Random Number Generator support"
	depends on ARCH_IXP4XX \|\| COMPILE_TEST
	default HW_RANDOM
	help
	This driver provides kernel-side support for the Pseudo-Random
	Number Generator hardware found on the Intel IXP45x/46x NPU.

	To compile this driver as a module, choose M here: the
	module will be called ixp4xx-rng.

	If unsure, say Y.

	config HW_RANDOM_OMAP
	tristate "OMAP Random Number Generator support"
	depends on ARCH_OMAP16XX \|\| ARCH_OMAP2PLUS \|\| ARCH_MVEBU \|\| ARCH_K3 \|\| ARCH_RZN1 \|\| COMPILE_TEST
	default HW_RANDOM
	help
	This driver provides kernel-side support for the Random Number
	Generator hardware found on OMAP16xx, OMAP2/3/4/5, AM33xx/AM43xx
	multimedia processors, and Marvell Armada 7k/8k SoCs.

	To compile this driver as a module, choose M here: the
	module will be called omap-rng.

	If unsure, say Y.

	config HW_RANDOM_OMAP3_ROM
	tristate "OMAP3 ROM Random Number Generator support"
	depends on ARCH_OMAP3 \|\| COMPILE_TEST
	default HW_RANDOM
	help
	This driver provides kernel-side support for the Random Number
	Generator hardware found on OMAP34xx processors.

	To compile this driver as a module, choose M here: the
	module will be called omap3-rom-rng.

	If unsure, say Y.

	config HW_RANDOM_OCTEON
	tristate "Octeon Random Number Generator support"
	depends on CAVIUM_OCTEON_SOC
	default HW_RANDOM
	help
	This driver provides kernel-side support for the Random Number
	Generator hardware found on Octeon processors.

	To compile this driver as a module, choose M here: the
	module will be called octeon-rng.

	If unsure, say Y.

	config HW_RANDOM_PASEMI
	tristate "PA Semi HW Random Number Generator support"
	depends on PPC_PASEMI \|\| (PPC && COMPILE_TEST)
	default HW_RANDOM
	help
	This driver provides kernel-side support for the Random Number
	Generator hardware found on PA Semi PWRficient SoCs.

	To compile this driver as a module, choose M here: the
	module will be called pasemi-rng.

	If unsure, say Y.

	config HW_RANDOM_VIRTIO
	tristate "VirtIO Random Number Generator support"
	depends on VIRTIO
	help
	This driver provides kernel-side support for the virtual Random Number
	Generator hardware.

	To compile this driver as a module, choose M here: the
	module will be called virtio-rng. If unsure, say N.

	config HW_RANDOM_MXC_RNGA
	tristate "Freescale i.MX RNGA Random Number Generator"
	depends on SOC_IMX31 \|\| COMPILE_TEST
	default HW_RANDOM
	help
	This driver provides kernel-side support for the Random Number
	Generator hardware found on Freescale i.MX processors.

	To compile this driver as a module, choose M here: the
	module will be called mxc-rnga.

	If unsure, say Y.

	config HW_RANDOM_IMX_RNGC
	tristate "Freescale i.MX RNGC Random Number Generator"
	depends on HAS_IOMEM
	depends on SOC_IMX25 \|\| SOC_IMX6SL \|\| SOC_IMX6SLL \|\| SOC_IMX6UL \|\| COMPILE_TEST
	default HW_RANDOM
	help
	This driver provides kernel-side support for the Random Number
	Generator Version C hardware found on some Freescale i.MX
	processors. Version B is also supported by this driver.

	To compile this driver as a module, choose M here: the
	module will be called imx-rngc.

	If unsure, say Y.

	config HW_RANDOM_INGENIC_RNG
	tristate "Ingenic Random Number Generator support"
	depends on MACH_JZ4780 \|\| MACH_X1000 \|\| COMPILE_TEST
	default HW_RANDOM
	help
	This driver provides kernel-side support for the Random Number Generator
	hardware found in ingenic JZ4780 and X1000 SoC. MIPS Creator CI20 uses
	JZ4780 SoC, YSH & ATIL CU1000-Neo uses X1000 SoC.

	To compile this driver as a module, choose M here: the
	module will be called ingenic-rng.

	If unsure, say Y.

	config HW_RANDOM_INGENIC_TRNG
	tristate "Ingenic True Random Number Generator support"
	depends on MACH_X1830 \|\| COMPILE_TEST
	default HW_RANDOM
	help
	This driver provides kernel-side support for the True Random Number Generator
	hardware found in ingenic X1830 SoC. YSH & ATIL CU1830-Neo uses X1830 SoC.

	To compile this driver as a module, choose M here: the
	module will be called ingenic-trng.

	If unsure, say Y.

	config HW_RANDOM_NOMADIK
	tristate "ST-Ericsson Nomadik Random Number Generator support"
	depends on ARCH_NOMADIK \|\| COMPILE_TEST
	depends on ARM_AMBA
	default HW_RANDOM
	help
	This driver provides kernel-side support for the Random Number
	Generator hardware found on ST-Ericsson SoCs (8815 and 8500).

	To compile this driver as a module, choose M here: the
	module will be called nomadik-rng.

	If unsure, say Y.

	config HW_RANDOM_PSERIES
	tristate "pSeries HW Random Number Generator support"
	depends on PPC64 && IBMVIO
	default HW_RANDOM
	help
	This driver provides kernel-side support for the Random Number
	Generator hardware found on POWER7+ machines and above

	To compile this driver as a module, choose M here: the
	module will be called pseries-rng.

	If unsure, say Y.

	config HW_RANDOM_POWERNV
	tristate "PowerNV Random Number Generator support"
	depends on PPC_POWERNV
	default HW_RANDOM
	help
	This is the driver for Random Number Generator hardware found
	in POWER7+ and above machines for PowerNV platform.

	To compile this driver as a module, choose M here: the
	module will be called powernv-rng.

	If unsure, say Y.

	config HW_RANDOM_HISI
	tristate "Hisilicon Random Number Generator support"
	depends on ARCH_HISI \|\| COMPILE_TEST
	default HW_RANDOM
	help
	This driver provides kernel-side support for the Random Number
	Generator hardware found on Hisilicon Hip04 and Hip05 SoC.

	To compile this driver as a module, choose M here: the
	module will be called hisi-rng.

	If unsure, say Y.

	config HW_RANDOM_HISTB
	tristate "Hisilicon STB Random Number Generator support"
	depends on ARCH_HISI \|\| COMPILE_TEST
	default ARCH_HISI
	help
	This driver provides kernel-side support for the Random Number
	Generator hardware found on Hisilicon Hi37xx SoC.

	To compile this driver as a module, choose M here: the
	module will be called histb-rng.

	config HW_RANDOM_HISI_TRNG
	tristate "HiSilicon True Random Number Generator support"
	depends on ARM64 && ACPI
	help
	This driver provides kernel-side support for the True Random Number
	Generator hardware found on some HiSilicon SoCs.

	To compile this driver as a module, choose M here: the module will be
	called hisi-trng-v2.

	config HW_RANDOM_ST
	tristate "ST Microelectronics HW Random Number Generator support"
	depends on ARCH_STI \|\| COMPILE_TEST
	help
	This driver provides kernel-side support for the Random Number
	Generator hardware found on STi series of SoCs.

	To compile this driver as a module, choose M here: the
	module will be called st-rng.

	config HW_RANDOM_XGENE
	tristate "APM X-Gene True Random Number Generator (TRNG) support"
	depends on ARCH_XGENE \|\| COMPILE_TEST
	default HW_RANDOM
	help
	This driver provides kernel-side support for the Random Number
	Generator hardware found on APM X-Gene SoC.

	To compile this driver as a module, choose M here: the
	module will be called xgene_rng.

	If unsure, say Y.

	config HW_RANDOM_STM32
	tristate "STMicroelectronics STM32 random number generator"
	depends on ARCH_STM32 \|\| COMPILE_TEST
	depends on HAS_IOMEM
	default HW_RANDOM
	help
	This driver provides kernel-side support for the Random Number
	Generator hardware found on STM32 microcontrollers.

	To compile this driver as a module, choose M here: the
	module will be called stm32-rng.

	If unsure, say N.

	config HW_RANDOM_PIC32
	tristate "Microchip PIC32 Random Number Generator support"
	depends on MACH_PIC32 \|\| COMPILE_TEST
	default HW_RANDOM if MACH_PIC32
	help
	This driver provides kernel-side support for the Random Number
	Generator hardware found on a PIC32.

	To compile this driver as a module, choose M here. the
	module will be called pic32-rng.

	If unsure, say Y.

	config HW_RANDOM_POLARFIRE_SOC
	tristate "Microchip PolarFire SoC Random Number Generator support"
	depends on HW_RANDOM && POLARFIRE_SOC_SYS_CTRL
	help
	This driver provides kernel-side support for the Random Number
	Generator hardware found on PolarFire SoC (MPFS).

	To compile this driver as a module, choose M here. The
	module will be called mfps_rng.

	If unsure, say N.


	config HW_RANDOM_MESON
	tristate "Amlogic Meson Random Number Generator support"
	depends on ARCH_MESON \|\| COMPILE_TEST
	depends on HAS_IOMEM && OF
	default HW_RANDOM if ARCH_MESON
	help
	This driver provides kernel-side support for the Random Number
	Generator hardware found on Amlogic Meson SoCs.

	To compile this driver as a module, choose M here. the
	module will be called meson-rng.

	If unsure, say Y.

	config HW_RANDOM_CAVIUM
	tristate "Cavium ThunderX Random Number Generator support"
	depends on PCI
	depends on ARCH_THUNDER \|\| (ARM64 && COMPILE_TEST)
	default HW_RANDOM
	help
	This driver provides kernel-side support for the Random Number
	Generator hardware found on Cavium SoCs.

	To compile this driver as a module, choose M here: the
	module will be called cavium_rng.

	If unsure, say Y.

	config HW_RANDOM_MTK
	tristate "Mediatek Random Number Generator support"
	depends on ARCH_MEDIATEK \|\| COMPILE_TEST
	depends on HAS_IOMEM && OF
	default HW_RANDOM if ARCH_MEDIATEK
	help
	This driver provides kernel-side support for the Random Number
	Generator hardware found on Mediatek SoCs.

	To compile this driver as a module, choose M here. the
	module will be called mtk-rng.

	If unsure, say Y.

	config HW_RANDOM_S390
	tristate "S390 True Random Number Generator support"
	depends on S390
	default HW_RANDOM
	help
	This driver provides kernel-side support for the True
	Random Number Generator available as CPACF extension
	on modern s390 hardware platforms.

	To compile this driver as a module, choose M here: the
	module will be called s390-trng.

	If unsure, say Y.

	config HW_RANDOM_EXYNOS
	tristate "Samsung Exynos True Random Number Generator support"
	depends on ARCH_EXYNOS \|\| COMPILE_TEST
	depends on HAS_IOMEM
	default HW_RANDOM if ARCH_EXYNOS
	help
	This driver provides support for the True Random Number
	Generator available in Exynos SoCs.

	To compile this driver as a module, choose M here: the module
	will be called exynos-trng.

	If unsure, say Y.

	config HW_RANDOM_OPTEE
	tristate "OP-TEE based Random Number Generator support"
	depends on OPTEE
	default HW_RANDOM
	help
	This driver provides support for OP-TEE based Random Number
	Generator on ARM SoCs where hardware entropy sources are not
	accessible to normal world (Linux).

	To compile this driver as a module, choose M here: the module
	will be called optee-rng.

	If unsure, say Y.

	config HW_RANDOM_NPCM
	tristate "NPCM Random Number Generator support"
	depends on ARCH_NPCM \|\| COMPILE_TEST
	depends on HAS_IOMEM
	default HW_RANDOM if ARCH_NPCM
	help
	This driver provides support for the Random Number
	Generator hardware available in Nuvoton NPCM SoCs.

	To compile this driver as a module, choose M here: the
	module will be called npcm-rng.

	If unsure, say Y.

	config HW_RANDOM_KEYSTONE
	tristate "TI Keystone NETCP SA Hardware random number generator"
	depends on ARCH_KEYSTONE \|\| COMPILE_TEST
	depends on HAS_IOMEM && OF
	default HW_RANDOM
	help
	This option enables Keystone's hardware random generator.

	config HW_RANDOM_CCTRNG
	tristate "Arm CryptoCell True Random Number Generator support"
	depends on HAS_IOMEM && OF
	help
	Say 'Y' to enable the True Random Number Generator driver for the
	Arm TrustZone CryptoCell family of processors.
	Currently the CryptoCell 713 and 703 are supported.
	The driver is supported only in SoC where Trusted Execution
	Environment is not used.
	Choose 'M' to compile this driver as a module. The module
	will be called cctrng.
	If unsure, say 'N'.

	config HW_RANDOM_XIPHERA
	tristate "Xiphera FPGA based True Random Number Generator support"
	depends on HAS_IOMEM
	help
	This driver provides kernel-side support for Xiphera True Random
	Number Generator Intellectual Property Core.

	To compile this driver as a module, choose M here: the
	module will be called xiphera-trng.

	config HW_RANDOM_ARM_SMCCC_TRNG
	tristate "Arm SMCCC TRNG firmware interface support"
	depends on HAVE_ARM_SMCCC_DISCOVERY
	default HW_RANDOM
	help
	Say 'Y' to enable the True Random Number Generator driver using
	the Arm SMCCC TRNG firmware interface. This reads entropy from
	higher exception levels (firmware, hypervisor). Uses SMCCC for
	communicating with the firmware:
	https://developer.arm.com/documentation/den0098/latest/

	To compile this driver as a module, choose M here: the
	module will be called arm_smccc_trng.

	config HW_RANDOM_CN10K
	tristate "Marvell CN10K Random Number Generator support"
	depends on HW_RANDOM && PCI && (ARM64 \|\| (64BIT && COMPILE_TEST))
	default HW_RANDOM if ARCH_THUNDER
	help
	This driver provides support for the True Random Number
	generator available in Marvell CN10K SoCs.

	To compile this driver as a module, choose M here.
	The module will be called cn10k_rng. If unsure, say Y.

	config HW_RANDOM_JH7110
	tristate "StarFive JH7110 Random Number Generator support"
	depends on SOC_STARFIVE \|\| COMPILE_TEST
	help
	This driver provides support for the True Random Number
	Generator in StarFive JH7110 SoCs.

	To compile this driver as a module, choose M here.
	The module will be called jh7110-trng.

	config HW_RANDOM_ROCKCHIP
	tristate "Rockchip True Random Number Generator"
	depends on HW_RANDOM && (ARCH_ROCKCHIP \|\| COMPILE_TEST)
	depends on HAS_IOMEM
	default HW_RANDOM
	help
	This driver provides kernel-side support for the True Random Number
	Generator hardware found on some Rockchip SoCs like RK3566, RK3568
	or RK3588.

	To compile this driver as a module, choose M here: the
	module will be called rockchip-rng.

	If unsure, say Y.

	config HW_RANDOM_XILINX
	tristate "Support for Xilinx True Random Generator"
	depends on ZYNQMP_FIRMWARE \|\| COMPILE_TEST
	select CRYPTO_LIB_SHA512
	help
	Xilinx Versal SoC driver provides kernel-side support for True Random Number
	Generator and Pseudo random Number in CTR_DRBG mode as defined in NIST SP800-90A.

	To compile this driver as a module, choose M here: the module
	will be called xilinx-trng.

	config HW_RANDOM_QCOM
	tristate "Qualcomm True Random Number Generator Driver"
	depends on ARCH_QCOM \|\| COMPILE_TEST
	depends on HW_RANDOM
	help
	This driver provides support for the True Random Number
	Generator hardware found on some Qualcomm SoCs.

	To compile this driver as a module, choose M here. The
	module will be called qcom-rng. If unsure, say N.

	endif # HW_RANDOM

	config UML_RANDOM
	depends on UML
	select HW_RANDOM
	tristate "UML Random Number Generator support"
	help
	This option enables UML's "hardware" random number generator. It
	attaches itself to the host's /dev/random, supplying as much entropy
	as the host has, rather than the small amount the UML gets from its
	own drivers. It registers itself as a rng-core driver thus providing
	a device which is usually called /dev/hwrng. This hardware random
	number generator does feed into the kernel's random number generator
	entropy pool.

	If unsure, say Y.