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charset="utf-8" Currently, TF-A-specific APIs are validated using the firmware PM_FEATURE_CHECK API, even though TF-A provides a dedicated mechanism via PM_API_FEATURES API. Update the feature check logic for TF-A-specific API calls to use PM_API_FEATURES. If this check fails, fall back to the legacy PM_FEATURE_CHECK to support backward compatibility. Signed-off-by: Jay Buddhabhatti Reviewed-by: Radhey Shyam Pandey Reviewed-by: Prasanna Kumar T S M --- drivers/firmware/xilinx/zynqmp.c | 25 +++++++++++++++---------- 1 file changed, 15 insertions(+), 10 deletions(-) diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zyn= qmp.c index fc7212f554ee..95f5941c5ca8 100644 --- a/drivers/firmware/xilinx/zynqmp.c +++ b/drivers/firmware/xilinx/zynqmp.c @@ -224,28 +224,33 @@ static int __do_feature_check_call(const u32 api_id, = u32 *ret_payload) module_id =3D FIELD_GET(MODULE_ID_MASK, api_id); =20 /* - * Feature check of APIs belonging to PM, XSEM, and TF-A are handled by c= alling + * Feature check of APIs belonging to PM and XSEM are handled by calling * PM_FEATURE_CHECK API. For other modules, call PM_API_FEATURES API. */ - if (module_id =3D=3D PM_MODULE_ID || module_id =3D=3D XSEM_MODULE_ID || m= odule_id =3D=3D TF_A_MODULE_ID) + if (module_id =3D=3D PM_MODULE_ID || module_id =3D=3D XSEM_MODULE_ID) feature_check_api_id =3D PM_FEATURE_CHECK; else feature_check_api_id =3D PM_API_FEATURES; =20 - /* - * Feature check of TF-A APIs is done in the TF-A layer and it expects for - * MODULE_ID_MASK bits of SMC's arg[0] to be the same as PM_MODULE_ID. - */ - if (module_id =3D=3D TF_A_MODULE_ID) { - module_id =3D PM_MODULE_ID; + if (module_id =3D=3D TF_A_MODULE_ID) smc_arg[1] =3D api_id; - } else { + else smc_arg[1] =3D (api_id & API_ID_MASK); - } =20 smc_arg[0] =3D PM_SIP_SVC | FIELD_PREP(MODULE_ID_MASK, module_id) | featu= re_check_api_id; =20 ret =3D do_fw_call(ret_payload, 2, smc_arg[0], smc_arg[1]); + + /* + * For TF-A APIs, if the feature check with PM_API_FEATURES fails, + * retry with the legacy PM_FEATURE_CHECK for backward compatibility. + */ + if (module_id =3D=3D TF_A_MODULE_ID && ret) { + smc_arg[0] =3D PM_SIP_SVC | FIELD_PREP(MODULE_ID_MASK, PM_MODULE_ID) | + PM_FEATURE_CHECK; 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charset="utf-8" When do_fw_call() fails in __do_feature_check_call(), propagate the actual errno from zynqmp_pm_ret_code() instead of always returning -EOPNOTSUPP. This gives callers more precise error information. Existing callers only test ret < 0 and are unchanged by this. Signed-off-by: Jay Buddhabhatti Reviewed-by: Radhey Shyam Pandey Reviewed-by: Prasanna Kumar T S M --- drivers/firmware/xilinx/zynqmp.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zyn= qmp.c index 95f5941c5ca8..0b6c20a1d8be 100644 --- a/drivers/firmware/xilinx/zynqmp.c +++ b/drivers/firmware/xilinx/zynqmp.c @@ -252,11 +252,9 @@ static int __do_feature_check_call(const u32 api_id, u= 32 *ret_payload) } =20 if (ret) - ret =3D -EOPNOTSUPP; - else - ret =3D ret_payload[1]; + return ret; =20 - return ret; + return ret_payload[1]; } =20 static int do_feature_check_call(const u32 api_id) --=20 2.34.1