On Fri, Sep 2, 2022 at 2:40 PM Sudeep Holla sudeep.holla@arm.com wrote:
Add support for FFA_FEATURES to discover properties supported at the FF-A interface. This interface can be used to query:
- If an FF-A interface is implemented by the component at the higher EL,
- If an implemented FF-A interface also implements any optional features described in its interface definition, and
- Any implementation details exported by an implemented FF-A interface as described in its interface definition.
Signed-off-by: Sudeep Holla sudeep.holla@arm.com
drivers/firmware/arm_ffa/driver.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+)
Reviewed-by: Jens Wiklander jens.wiklander@linaro.org
diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/driver.c index 04e7cbb1b9aa..81b8d578b6ea 100644 --- a/drivers/firmware/arm_ffa/driver.c +++ b/drivers/firmware/arm_ffa/driver.c @@ -571,6 +571,32 @@ static int ffa_memory_reclaim(u64 g_handle, u32 flags) return 0; }
+static int ffa_features(u32 func_feat_id, u32 input_props,
u32 *if_props_1, u32 *if_props_2)+{
ffa_value_t id;if (!ARM_SMCCC_IS_FAST_CALL(func_feat_id) && input_props) {pr_err("%s: Invalid Parameters: %x, %x", __func__,func_feat_id, input_props);return ffa_to_linux_errno(FFA_RET_INVALID_PARAMETERS);}invoke_ffa_fn((ffa_value_t){.a0 = FFA_FEATURES, .a1 = func_feat_id, .a2 = input_props,}, &id);if (id.a0 == FFA_ERROR)return ffa_to_linux_errno((int)id.a2);if (if_props_1)*if_props_1 = id.a2;if (if_props_2)*if_props_2 = id.a3;return 0;+}
static u32 ffa_api_version_get(void) { return drv_info->version; -- 2.37.3