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arm/arm64: smccc: Add SMCCC-specific return codes
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 <will.deacon@arm.com> Reviewed-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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@ -291,5 +291,10 @@ asmlinkage void __arm_smccc_hvc(unsigned long a0, unsigned long a1,
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*/
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#define arm_smccc_1_1_hvc(...) __arm_smccc_1_1(SMCCC_HVC_INST, __VA_ARGS__)
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/* Return codes defined in ARM DEN 0070A */
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#define SMCCC_RET_SUCCESS 0
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#define SMCCC_RET_NOT_SUPPORTED -1
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#define SMCCC_RET_NOT_REQUIRED -2
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#endif /*__ASSEMBLY__*/
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#endif /*__LINUX_ARM_SMCCC_H*/
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