| Message ID | 20240906-wrapped-keys-v6-8-d59e61bc0cb4@linaro.org |
|---|---|
| State | New |
| Headers | show |
| Series | Hardware wrapped key support for QCom ICE and UFS core | expand |
On 6.09.2024 8:07 PM, Bartosz Golaszewski wrote: > From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org> > > Add a helper that allows users to check if wrapped key support is > available on the platform by checking if the SCM call allowing to > derive the software secret from a wrapped key is enabled. > > Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org> > --- I dearly hope that all firmwares that advertise this call, also advertise the other necessary ones Reviewed-by: Konrad Dybcio <konradybcio@kernel.org> Konrad
diff --git a/drivers/firmware/qcom/qcom_scm.c b/drivers/firmware/qcom/qcom_scm.c index 27d8cb481ed7..1053c16d5e50 100644 --- a/drivers/firmware/qcom/qcom_scm.c +++ b/drivers/firmware/qcom/qcom_scm.c @@ -1252,6 +1252,13 @@ int qcom_scm_ice_set_key(u32 index, const u8 *key, u32 key_size, } EXPORT_SYMBOL_GPL(qcom_scm_ice_set_key); +bool qcom_scm_has_wrapped_key_support(void) +{ + return __qcom_scm_is_call_available(__scm->dev, QCOM_SCM_SVC_ES, + QCOM_SCM_ES_DERIVE_SW_SECRET); +} +EXPORT_SYMBOL_GPL(qcom_scm_has_wrapped_key_support); + /** * qcom_scm_derive_sw_secret() - Derive software secret from wrapped key * @wkey: the hardware wrapped key inaccessible to software diff --git a/include/linux/firmware/qcom/qcom_scm.h b/include/linux/firmware/qcom/qcom_scm.h index b5ab39b35490..94d4e3c96210 100644 --- a/include/linux/firmware/qcom/qcom_scm.h +++ b/include/linux/firmware/qcom/qcom_scm.h @@ -110,6 +110,7 @@ int qcom_scm_prepare_ice_key(const u8 *lt_key, size_t lt_key_size, u8 *eph_key, size_t eph_size); int qcom_scm_import_ice_key(const u8 *imp_key, size_t imp_size, u8 *lt_key, size_t lt_key_size); +bool qcom_scm_has_wrapped_key_support(void); bool qcom_scm_hdcp_available(void); int qcom_scm_hdcp_req(struct qcom_scm_hdcp_req *req, u32 req_cnt, u32 *resp);