From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5F0D6EC0; Thu, 5 Dec 2024 08:14:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733386489; cv=none; b=DoN4eo+VRqTGdA6AoaI6dHC+maXmWy/HFc36XZmJI4v3pAhAkph7DVYwvyucMz8EMr4YQQnZjA/OmIcNOcNhaZtR8lYuKMOE5f8tIXv9KCWWA71qBe62yb//9NmKodpxz+sX1Qm0tQzUH+uU9Y7pNEavfVhquruj8Pp4eQTNyMQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733386489; c=relaxed/simple; bh=9X/aD4pGIV+/vcIq+d1mvHuyyzWzoMkOv/nQxabgb3Y=; h=Message-ID:Date:MIME-Version:Subject:To:References:From: In-Reply-To:Content-Type; b=lexTR+YxEbP6yV7q5XN7bqXTqrcNDFM3Dvh+iCFN5bZVu8qAXL0JzcINPnjACKu+aLtPVkTh2JKtksgs8Hwb5/ypDZYHTI/mHGQclUp+SR08Z5qpCrod3FUTbjfkCScZcGMMbZSP2XrI2NvMEGHpy4GhPYhWovk08ryQB04Yb/I= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=B/uGT4iW; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="B/uGT4iW" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EFDFBC4CED1; Thu, 5 Dec 2024 08:14:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1733386488; bh=9X/aD4pGIV+/vcIq+d1mvHuyyzWzoMkOv/nQxabgb3Y=; h=Date:Subject:To:References:From:In-Reply-To:From; b=B/uGT4iWS1yLra8zmrdmfM8yUajCKQl/59T2fdZDiknqmCTvxVF+wLlxVYSdMih7y ZKsXUH/B9vbpq12pfTpRbPEvGmER+BVPTO2KP+2Iu6ERzlg/TdoLAjHlKqM5CjXQPG eGu4qCHdDZ1FPACqK2E3JgSyiI7ehng+lxhFQ2zo6pj6r+QWalJN5W306PNM/8qnIw EA+UwIHYt8u3I5SLpiYkA+UG5oV/0w4t5vpC5xJLpHCyx7ZA/SaXzy+cVq97TQZwCI 328kPv3USgqbnQy0eCyk9N07DzQRbb2kF+UGnwjp4niue18cKhl+hWTjTlU6BBZ8bo CvjjfX2Rl7J6w== Message-ID: <06b48a7f-de53-4b53-b3ac-be9efcee5558@kernel.org> Date: Thu, 5 Dec 2024 09:14:43 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH RFC 2/2] mailbox: tmelite-qmp: Introduce QCOM TMEL QMP mailbox driver To: Sricharan R , jassisinghbrar@gmail.com, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org References: <20241205080633.2623142-1-quic_srichara@quicinc.com> <20241205080633.2623142-3-quic_srichara@quicinc.com> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 05/12/2024 09:06, Sricharan R wrote: > From: Sricharan Ramabadhran > > The QMP mailbox is the primary means of communication between TME-L SS > and other subsystem on the SoC. A dedicated pair of inbound and outbound > mailboxes is implemented for each subsystem/external execution environment > which needs to communicate with TME-L for security services. The inbound > mailboxes are used to send IPC requests to TME-L, which are then processed > by TME-L firmware and accordingly the responses are sent to the requestor > via outbound mailboxes. > > It is an IPC transport protocol which is light weight and supports > a subset of API's. It handles link initialization, negotiation, > establishment and communication across client(APPSS/BTSS/AUDIOSS) > and server(TME-L SS). > > ----------------------------------------------- --------------------------------------------------- > | | | | > | SOC CLIENT | SOC | TME-L SS | > | | AHB | | > | ---------- --------- --------- | | ------ ------- -------- ------------ | > | | | | | | | | WO | | | R | | | | |SERVICES | | > | | APPS |<-->| TMEL |<->| |------------->| | IN |-->| | | TMEL | |-------- | | > | | | | COM | | QMP | | RO | | | W | QMP |<--->| COM |<-->| a) ATTEST | | > | | | | | | |<-------------| | OUT |<--| | | | | b) CRYPTO | | > | | | | | | | | | | | | | | | | .. more | | > | --------- --------- --------- | | ------ ------- ------- ------------ | > | | | | > ----------------------------------------------- -------------------------------------------------- Hardware description is much more suitable for the binding, not to the driver. You wrote the same in cover letter and here... but not in actual hardware description - binding. > > TME-L SS provides different kinds of services like secureboot, remote image authentication, > key management, crypto, OEM provisioning etc. This patch adds support for remote image > authentication. Support for rest of the services can be added. Please wrap commit message according to Linux coding style / submission process (neither too early nor over the limit): https://elixir.bootlin.com/linux/v6.4-rc1/source/Documentation/process/submitting-patches.rst#L597 > > Remote proc driver subscribes to this mailbox and uses the mbox_send_message to use > TME-L to securely authenticate/teardown the images. > > The intention of posting this is to get the design reviewed/corrected since there are also > other possible ways of having this SS support. If you do not Cc maintainers, don't expect much answer. Missing Qcom amd remoteproc maintainers. Best regards, Krzysztof