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| author | Sumit Garg <sumit.garg@linaro.org> | 2019-01-29 06:49:38 +0100 |
|---|---|---|
| committer | Jens Wiklander <jens.wiklander@linaro.org> | 2019-02-01 15:12:46 +0100 |
| commit | 5fe8b1cc6a03c46b3061e808256d39dcebd0d0f0 (patch) | |
| tree | 02259dbae37297a4cfbae43a53db81a594dca0c4 /drivers/char/hw_random/Kconfig | |
| parent | tee: optee: add TEE bus device enumeration support (diff) | |
| download | linux-5fe8b1cc6a03c46b3061e808256d39dcebd0d0f0.tar.xz linux-5fe8b1cc6a03c46b3061e808256d39dcebd0d0f0.zip | |
hwrng: add OP-TEE based rng driver
On ARM SoC's with TrustZone enabled, peripherals like entropy sources
might not be accessible to normal world (linux in this case) and rather
accessible to secure world (OP-TEE in this case) only. So this driver
aims to provides a generic interface to OP-TEE based random number
generator service.
This driver registers on TEE bus to interact with OP-TEE based rng
device/service.
Signed-off-by: Sumit Garg <sumit.garg@linaro.org>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Diffstat (limited to 'drivers/char/hw_random/Kconfig')
| -rw-r--r-- | drivers/char/hw_random/Kconfig | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/char/hw_random/Kconfig b/drivers/char/hw_random/Kconfig index dac895dc01b9..25a7d8ffdb5d 100644 --- a/drivers/char/hw_random/Kconfig +++ b/drivers/char/hw_random/Kconfig @@ -424,6 +424,21 @@ config HW_RANDOM_EXYNOS 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. + endif # HW_RANDOM config UML_RANDOM |