diff mbox series

[v4,1/5] firmware: smccc: Add SMCCC TRNG function call IDs

Message ID 20201211160005.187336-2-andre.przywara@arm.com (mailing list archive)
State New, archived
Headers show
Series ARM: arm64: Add SMCCC TRNG entropy service | expand

Commit Message

Andre Przywara Dec. 11, 2020, 4 p.m. UTC 
From: Ard Biesheuvel <ardb@kernel.org>

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: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
---
 include/linux/arm-smccc.h | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

Comments

Sudeep Holla Dec. 11, 2020, 5:29 p.m. UTC | #1 
On Fri, Dec 11, 2020 at 04:00:01PM +0000, Andre Przywara wrote:
> From: Ard Biesheuvel <ardb@kernel.org>
> 
> 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: Ard Biesheuvel <ardb@kernel.org>
> Signed-off-by: Andre Przywara <andre.przywara@arm.com>
> Reviewed-by: Linus Walleij <linus.walleij@linaro.org>

Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
diff mbox series

Patch

diff --git a/include/linux/arm-smccc.h b/include/linux/arm-smccc.h
index f860645f6512..62c54234576c 100644
--- a/include/linux/arm-smccc.h
+++ b/include/linux/arm-smccc.h
@@ -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