On Tue, May 22, 2018 at 04:06:35PM +0100, Marc Zyngier wrote: > 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]> > Signed-off-by: Marc Zyngier <[email protected]>
Reviewed-by: Mark Rutland <[email protected]> Mark. > --- > 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 > [email protected] > https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
