[PATCH v3 6/7] firmware: smccc: Add function to fetch SMCCC version
From: Sudeep Holla <hidden>
Date: 2020-05-06 16:44:44
Also in:
lkml
Subsystem:
secure monitor call(smc) calling convention (smccc), the rest · Maintainers:
Mark Rutland, Lorenzo Pieralisi, Sudeep Holla, Linus Torvalds
For backward compatibility reasons, PSCI maintains SMCCC version as SMCCC didn't provide ARM_SMCCC_VERSION_FUNC_ID until v1.1 Let us provide accessors to fetch the SMCCC version in PSCI so that other SMCCC v1.1+ features can use it. Reviewed-by: Steven Price <steven.price@arm.com> Signed-off-by: Sudeep Holla <redacted> --- drivers/firmware/smccc/smccc.c | 4 ++++ include/linux/arm-smccc.h | 9 +++++++++ 2 files changed, 13 insertions(+)
diff --git a/drivers/firmware/smccc/smccc.c b/drivers/firmware/smccc/smccc.c
index 488699aae24f..672974df0dfe 100644
--- a/drivers/firmware/smccc/smccc.c
+++ b/drivers/firmware/smccc/smccc.c@@ -24,3 +24,7 @@ enum arm_smccc_conduit arm_smccc_1_1_get_conduit(void) return smccc_conduit; } +u32 arm_smccc_version_get(void) +{ + return smccc_version; +}
diff --git a/include/linux/arm-smccc.h b/include/linux/arm-smccc.h
index 11fb20bfa8f7..8dd54dad1ec5 100644
--- a/include/linux/arm-smccc.h
+++ b/include/linux/arm-smccc.h@@ -109,6 +109,15 @@ void __init arm_smccc_version_init(u32 version, enum arm_smccc_conduit conduit); */ enum arm_smccc_conduit arm_smccc_1_1_get_conduit(void); +/** + * arm_smccc_version_get() + * + * Returns the version to be used for SMCCCv1.1 or later. + * + * When SMCCCv1.1 or above is not present, assumes and returns SMCCCv1.0. + */ +u32 arm_smccc_version_get(void); + /** * struct arm_smccc_res - Result from SMC/HVC call * @a0-a3 result values from registers 0 to 3
--
2.17.1
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