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authorMark Rutland <mark.rutland@arm.com>2019-08-09 16:22:40 +0300
committerCatalin Marinas <catalin.marinas@arm.com>2019-10-14 12:55:13 +0300
commit6b7fe77c334ae59fed9500140e08f4f896b36871 (patch)
tree0acb925090ffe67eacb39b965935b072ab84cf25 /include/linux/arm-smccc.h
parent4f5cafb5cb8471e54afdc9054d973535614f7675 (diff)
downloadlinux-6b7fe77c334ae59fed9500140e08f4f896b36871.tar.xz
arm/arm64: smccc/psci: add arm_smccc_1_1_get_conduit()
SMCCC callers are currently amassing a collection of enums for the SMCCC conduit, and are having to dig into the PSCI driver's internals in order to figure out what to do. Let's clean this up, with common SMCCC_CONDUIT_* definitions, and an arm_smccc_1_1_get_conduit() helper that abstracts the PSCI driver's internal state. We can kill off the PSCI_CONDUIT_* definitions once we've migrated users over to the new interface. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Acked-by: Will Deacon <will.deacon@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.h16
1 files changed, 16 insertions, 0 deletions
diff --git a/include/linux/arm-smccc.h b/include/linux/arm-smccc.h
index 080012a6f025..df01a8579034 100644
--- a/include/linux/arm-smccc.h
+++ b/include/linux/arm-smccc.h
@@ -80,6 +80,22 @@
#include <linux/linkage.h>
#include <linux/types.h>
+
+enum arm_smccc_conduit {
+ SMCCC_CONDUIT_NONE,
+ SMCCC_CONDUIT_SMC,
+ SMCCC_CONDUIT_HVC,
+};
+
+/**
+ * arm_smccc_1_1_get_conduit()
+ *
+ * Returns the conduit to be used for SMCCCv1.1 or later.
+ *
+ * When SMCCCv1.1 is not present, returns SMCCC_CONDUIT_NONE.
+ */
+enum arm_smccc_conduit arm_smccc_1_1_get_conduit(void);
+
/**
* struct arm_smccc_res - Result from SMC/HVC call
* @a0-a3 result values from registers 0 to 3