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From: Andre Przywara <andre.przywara@arm.com>
To: Will Deacon <will@kernel.org>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Ard Biesheuvel <ardb@kernel.org>,
	Russell King <linux@armlinux.org.uk>,
	Marc Zyngier <maz@kernel.org>
Cc: Theodore Ts'o <tytso@mit.edu>,
	Sudeep Holla <sudeep.holla@arm.com>,
	Mark Rutland <mark.rutland@arm.com>,
	Mark Brown <broonie@kernel.org>,
	Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
	Linus Walleij <linus.walleij@linaro.org>,
	linux-arm-kernel@lists.infradead.org,
	kvmarm@lists.cs.columbia.edu, linux-kernel@vger.kernel.org
Subject: [PATCH v4 1/5] firmware: smccc: Add SMCCC TRNG function call IDs
Date: Fri, 11 Dec 2020 16:00:01 +0000	[thread overview]
Message-ID: <20201211160005.187336-2-andre.przywara@arm.com> (raw)
In-Reply-To: <20201211160005.187336-1-andre.przywara@arm.com>

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(+)

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
-- 
2.17.1


  reply	other threads:[~2020-12-11 17:14 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-11 16:00 [PATCH v4 0/5] ARM: arm64: Add SMCCC TRNG entropy service Andre Przywara
2020-12-11 16:00 ` Andre Przywara [this message]
2020-12-11 17:29   ` [PATCH v4 1/5] firmware: smccc: Add SMCCC TRNG function call IDs Sudeep Holla
2020-12-11 16:00 ` [PATCH v4 2/5] firmware: smccc: Introduce SMCCC TRNG framework Andre Przywara
2020-12-11 17:31   ` Sudeep Holla
2020-12-11 16:00 ` [PATCH v4 3/5] ARM: implement support for SMCCC TRNG entropy source Andre Przywara
2020-12-11 16:00 ` [PATCH v4 4/5] arm64: Add " Andre Przywara
2020-12-11 16:26   ` Mark Brown
2021-01-04 11:49     ` Andre Przywara
2020-12-11 16:00 ` [PATCH v4 5/5] KVM: arm64: implement the TRNG hypervisor call Andre Przywara

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