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authorMarc Zyngier <marc.zyngier@arm.com>2018-05-29 15:11:05 +0300
committerCatalin Marinas <catalin.marinas@arm.com>2018-05-31 19:30:44 +0300
commiteff0e9e1078ea7dc1d794dc50e31baef984c46d7 (patch)
treecd8c296d0403fefd8a28f6d0d74f0d52c136a97a /include/linux/arm-smccc.h
parentc870f14ea115bb1d9e57cad3ec6b876cf5542f9f (diff)
downloadlinux-eff0e9e1078ea7dc1d794dc50e31baef984c46d7.tar.xz
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>
Diffstat (limited to 'include/linux/arm-smccc.h')
-rw-r--r--include/linux/arm-smccc.h5
1 files changed, 5 insertions, 0 deletions
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*/