Commit d1b5c195 authored Jul 20, 2018 by Marc Zyngier Committed by Greg Kroah-Hartman Jul 22, 2018

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



commit eff0e9e1078ea7dc1d794dc50e31baef984c46d7 upstream.

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>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent cab367c1

include/linux/arm-smccc.h

+5 −0

Original line number	Diff line number	Diff line
		@@ -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/