Messages in this thread Patch in this message | | | From | Sudeep Holla <> | Subject | [PATCH 4/5] firmware: psci: Add function to fetch SMCCC version | Date | Thu, 30 Apr 2020 12:48:13 +0100 |
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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.
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> --- drivers/firmware/psci/psci.c | 5 +++++ include/linux/arm-smccc.h | 9 +++++++++ 2 files changed, 14 insertions(+)
diff --git a/drivers/firmware/psci/psci.c b/drivers/firmware/psci/psci.c index 6a56d7196697..04426e16fee6 100644 --- a/drivers/firmware/psci/psci.c +++ b/drivers/firmware/psci/psci.c @@ -65,6 +65,11 @@ enum arm_smccc_conduit arm_smccc_1_1_get_conduit(void) return psci_ops.conduit; } +u32 arm_smccc_get_version(void) +{ + return psci_ops.smccc_version; +} + typedef unsigned long (psci_fn)(unsigned long, unsigned long, unsigned long, unsigned long); static psci_fn *invoke_psci_fn; diff --git a/include/linux/arm-smccc.h b/include/linux/arm-smccc.h index 9d9a2e42e919..d6b0f4acc707 100644 --- a/include/linux/arm-smccc.h +++ b/include/linux/arm-smccc.h @@ -98,6 +98,15 @@ enum arm_smccc_conduit { */ enum arm_smccc_conduit arm_smccc_1_1_get_conduit(void); +/** + * arm_smccc_get_version() + * + * 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_get_version(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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