Commit 67c6bb56 authored by Ard Biesheuvel's avatar Ard Biesheuvel Committed by Will Deacon
Browse files

firmware: smccc: Add SMCCC TRNG function call IDs 



The ARM architected TRNG firmware interface, described in ARM spec
DEN0098, define an ARM SMCCC based interface to a true random number
generator, provided by firmware.

Add the definitions of the SMCCC functions as defined by the spec.

Signed-off-by: default avatarArd Biesheuvel <ardb@kernel.org>
Signed-off-by: default avatarAndre Przywara <andre.przywara@arm.com>
Reviewed-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Reviewed-by: default avatarSudeep Holla <sudeep.holla@arm.com>
Link: https://lore.kernel.org/r/20210106103453.152275-2-andre.przywara@arm.com


Signed-off-by: default avatarWill Deacon <will@kernel.org>
parent 19c329f6

include/linux/arm-smccc.h

+31 −0
Original line number Diff line number Diff line
@@ -102,6 +102,37 @@ 
			   ARM_SMCCC_OWNER_STANDARD_HYP,	\

			   0x21)



/* TRNG entropy source calls (defined by ARM DEN0098) */

#define ARM_SMCCC_TRNG_VERSION					\

	ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL,			\

			   ARM_SMCCC_SMC_32,			\

			   ARM_SMCCC_OWNER_STANDARD,		\

			   0x50)



#define ARM_SMCCC_TRNG_FEATURES					\

	ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL,			\

			   ARM_SMCCC_SMC_32,			\

			   ARM_SMCCC_OWNER_STANDARD,		\

			   0x51)



#define ARM_SMCCC_TRNG_GET_UUID					\

	ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL,			\

			   ARM_SMCCC_SMC_32,			\

			   ARM_SMCCC_OWNER_STANDARD,		\

			   0x52)



#define ARM_SMCCC_TRNG_RND32					\

	ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL,			\

			   ARM_SMCCC_SMC_32,			\

			   ARM_SMCCC_OWNER_STANDARD,		\

			   0x53)



#define ARM_SMCCC_TRNG_RND64					\

	ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL,			\

			   ARM_SMCCC_SMC_64,			\

			   ARM_SMCCC_OWNER_STANDARD,		\

			   0x53)



/*

 * Return codes defined in ARM DEN 0070A

 * ARM DEN 0070A is now merged/consolidated into ARM DEN 0028 C