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.dea...@arm.com> Reviewed-by: Mark Rutland <mark.rutl...@arm.com> Signed-off-by: Marc Zyngier <marc.zyng...@arm.com> --- include/linux/arm-smccc.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/include/linux/arm-smccc.h b/include/linux/arm-smccc.h index a031897fca76..c89da86de99f 100644 --- a/include/linux/arm-smccc.h +++ b/include/linux/arm-smccc.h @@ -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*/ -- 2.14.2 _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
