linux-kernel - Re: [PATCH v3] firmware: arm_scmi: support optee shared memory in optee transport

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Date:   Tue, 26 Apr 2022 17:48:16 +0100
From:   Cristian Marussi <cristian.marussi@....com>
To:     Etienne Carriere <etienne.carriere@...aro.org>
Cc:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        Sudeep Holla <sudeep.holla@....com>,
        Vincent Guittot <vincent.guittot@...aro.org>
Subject: Re: [PATCH v3] firmware: arm_scmi: support optee shared memory in
 optee transport

On Mon, Apr 25, 2022 at 10:51:27AM +0200, Etienne Carriere wrote:
> Adds support for tee shared memory in optee scmi transport. When using
> tee shared memory, scmi optee transport manages SCMI messages using
> msg protocol (from msg.c) in shared memory, whereas smt (from shmem.c)
> protocol is used with static IOMEM shared buffers.
> 
> Signed-off-by: Etienne Carriere <etienne.carriere@...aro.org>
> ---
> Changes since v2:
> - Select configuration switch ARM_SCMI_HAVE_MSG when
>   ARM_SCMI_TRANSPORT_OPTEE is enabled.
> - Don't consider tee_shm in invoke_process_smt_channel() since
>   this function now assumes TEE shared memory is not used for SMT
>   based channel.
> 
> Changes since v1:
> - Remove call to scmi_rx_callback() in scmi_optee_send_message().
> ---

LGTM

Reviewed-by: Cristian Marussi <cristian.marussi@....com>

Thanks,
Cristian