Messages in this thread Patch in this message | | | From | Etienne Carriere <> | Subject | [PATCH 2/2] firmware: arm_scmi: optee: use optee system invocation | Date | Mon, 30 Jan 2023 10:41:57 +0100 |
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Changes SCMI optee transport to enable sys_service capability of its tee context to leverage provisioned system resources in OP-TEE preventing possible deadlock.
Such deadlock could happen when many Linux clients invoke OP-TEE are are all suspended waiting for an OP-TEE RPC request access an SCMI resource through the SCMI OP-TEE PTA service.
Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org> --- drivers/firmware/arm_scmi/optee.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/firmware/arm_scmi/optee.c b/drivers/firmware/arm_scmi/optee.c index 2a7aeab40e54..91840345e946 100644 --- a/drivers/firmware/arm_scmi/optee.c +++ b/drivers/firmware/arm_scmi/optee.c @@ -559,6 +559,9 @@ static int scmi_optee_service_probe(struct device *dev) if (IS_ERR(tee_ctx)) return -ENODEV; + /* SCMI agent can used TEE system service resources */ + tee_ctx->sys_service = true; + agent = devm_kzalloc(dev, sizeof(*agent), GFP_KERNEL); if (!agent) { ret = -ENOMEM; -- 2.25.1
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