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arm/arm64: smccc: Add SMCCC-specific return codes

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We've so far used the PSCI return codes for SMCCC because they
were extremely similar. But with the new ARM DEN 0070A specification,
"NOT_REQUIRED" (-2) is clashing with PSCI's "PSCI_RET_INVALID_PARAMS".

Let's bite the bullet and add SMCCC specific return codes. Users
can be repainted as and when required.

Acked-by: Will Deacon <[email protected]>
Reviewed-by: Mark Rutland <[email protected]>
Signed-off-by: Marc Zyngier <[email protected]>
Signed-off-by: Catalin Marinas <[email protected]>
This commit is contained in:
Marc Zyngier
2018-05-31 17:30:44 +01:00
committed by Catalin Marinas
parent c870f14ea1
commit eff0e9e107
1 changed files with 5 additions and 0 deletions
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include/linux/arm-smccc.h
+5
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@@ -291,5 +291,10 @@ 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 */
#define SMCCC_RET_SUCCESS 0
#define SMCCC_RET_NOT_SUPPORTED -1
#define SMCCC_RET_NOT_REQUIRED -2
#endif /*__ASSEMBLY__*/
#endif /*__LINUX_ARM_SMCCC_H*/