linux-kernel - [PATCH v4 3/7] firmware: smccc: Add the definition for SMCCCv1.2 version/error codes

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Message-Id: <20200518091222.27467-4-sudeep.holla@arm.com>
Date:   Mon, 18 May 2020 10:12:18 +0100
From:   Sudeep Holla <sudeep.holla@....com>
To:     linux-arm-kernel@...ts.infradead.org
Cc:     Sudeep Holla <sudeep.holla@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Steven Price <steven.price@....com>,
        linux-kernel@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
        harb@...erecomputing.com
Subject: [PATCH v4 3/7] firmware: smccc: Add the definition for SMCCCv1.2 version/error codes

Add the definition for SMCCC v1.2 version and new error code added.
While at it, also add a note that ARM DEN 0070A is deprecated and is
now merged into the main SMCCC specification(ARM DEN 0028C).

Tested-by: Etienne Carriere <etienne.carriere@...com>
Reviewed-by: Steven Price <steven.price@....com>
Reviewed-by: Etienne Carriere <etienne.carriere@...com>
Signed-off-by: Sudeep Holla <sudeep.holla@....com>
---
 include/linux/arm-smccc.h | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/include/linux/arm-smccc.h b/include/linux/arm-smccc.h
index 31b15db9685d..c3784ba8e2a4 100644
--- a/include/linux/arm-smccc.h
+++ b/include/linux/arm-smccc.h
@@ -12,7 +12,7 @@
  * specified in
  * https://developer.arm.com/docs/den0028/latest
  *
- * This code is up-to-date with version DEN 0028 B
+ * This code is up-to-date with version DEN 0028 C
  */
 
 #define ARM_SMCCC_STD_CALL	        _AC(0,U)
@@ -58,6 +58,7 @@
 
 #define ARM_SMCCC_VERSION_1_0		0x10000
 #define ARM_SMCCC_VERSION_1_1		0x10001
+#define ARM_SMCCC_VERSION_1_2		0x10002
 
 #define ARM_SMCCC_VERSION_FUNC_ID					\
 	ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL,				\
@@ -316,10 +317,14 @@ asmlinkage void __arm_smccc_hvc(unsigned long a0, unsigned long a1,
  */
 #define arm_smccc_1_1_hvc(...)	__arm_smccc_1_1(SMCCC_HVC_INST, __VA_ARGS__)
 
-/* Return codes defined in ARM DEN 0070A */
+/*
+ * Return codes defined in ARM DEN 0070A
+ * ARM DEN 0070A is now merged/consolidated into ARM DEN 0028 C
+ */
 #define SMCCC_RET_SUCCESS			0
 #define SMCCC_RET_NOT_SUPPORTED			-1
 #define SMCCC_RET_NOT_REQUIRED			-2
+#define SMCCC_RET_INVALID_PARAMETER		-3
 
 /*
  * Like arm_smccc_1_1* but always returns SMCCC_RET_NOT_SUPPORTED.
-- 
2.17.1