From mboxrd@z Thu Jan 1 00:00:00 1970 From: jerome.forissier@linaro.org (Jerome Forissier) Date: Fri, 24 Nov 2017 15:47:17 +0100 Subject: [PATCH 1/2] tee: optee: GET_OS_REVISION: document a2 as a build identifier In-Reply-To: References: Message-ID: <23a6eaf6eeeb7111649280ecd6fd6be3d7900a07.1511533457.git.jerome.forissier@linaro.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org In the OPTEE_SMC_CALL_GET_OS_REVISION request, the previously reserved parameter a2 is now documented as being an optional build identifier (such as an SCM revision or commit ID, for instance). A new structure optee_smc_call_get_os_revision_result is introduced to be used when querying the secure OS version, instead of re-using the struct defined for OPTEE_SMC_CALLS_REVISION. Signed-off-by: Jerome Forissier --- drivers/tee/optee/optee_smc.h | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/tee/optee/optee_smc.h b/drivers/tee/optee/optee_smc.h index 069c8e1429de..d0b67c65ea8f 100644 --- a/drivers/tee/optee/optee_smc.h +++ b/drivers/tee/optee/optee_smc.h @@ -112,12 +112,20 @@ struct optee_smc_calls_revision_result { * Trusted OS, not of the API. * * Returns revision in a0-1 in the same way as OPTEE_SMC_CALLS_REVISION - * described above. + * described above. May optionally return a 32-bit build identifier in a2, + * with zero meaning unspecified. */ #define OPTEE_SMC_FUNCID_GET_OS_REVISION OPTEE_MSG_FUNCID_GET_OS_REVISION #define OPTEE_SMC_CALL_GET_OS_REVISION \ OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_GET_OS_REVISION) +struct optee_smc_call_get_os_revision_result { + unsigned long major; + unsigned long minor; + unsigned long build_id; + unsigned long reserved1; +}; + /* * Call with struct optee_msg_arg as argument * -- 2.7.4