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Tue, 01 Apr 2025 08:33:08 +0000 (GMT) Received: from nasanex01b.na.qualcomm.com (nasanex01b.na.qualcomm.com [10.46.141.250]) by NASANPPMTA01.qualcomm.com (8.18.1.2/8.18.1.2) with ESMTPS id 5318X7hQ007939 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 1 Apr 2025 08:33:07 GMT Received: from [10.216.27.117] (10.80.80.8) by nasanex01b.na.qualcomm.com (10.46.141.250) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.9; Tue, 1 Apr 2025 01:33:03 -0700 Message-ID: Date: Tue, 1 Apr 2025 14:03:00 +0530 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 V4 1/2] dt-bindings: mailbox: Document qcom,ipq5424-tmel To: Dmitry Baryshkov CC: , , , , , , , , , , References: <20250327181750.3733881-1-quic_srichara@quicinc.com> <20250327181750.3733881-2-quic_srichara@quicinc.com> Content-Language: en-US From: Sricharan Ramabadhran In-Reply-To: Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nasanex01b.na.qualcomm.com (10.46.141.250) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Authority-Analysis: v=2.4 cv=fMI53Yae c=1 sm=1 tr=0 ts=67eba4c4 cx=c_pps a=JYp8KDb2vCoCEuGobkYCKw==:117 a=JYp8KDb2vCoCEuGobkYCKw==:17 a=GEpy-HfZoHoA:10 a=IkcTkHD0fZMA:10 a=XR8D0OoHHMoA:10 a=COk6AnOGAAAA:8 a=slvfVLusu6YaaKTZB2QA:9 a=QEXdDO2ut3YA:10 a=TjNXssC_j7lpFel5tvFf:22 X-Proofpoint-ORIG-GUID: bmjCYU9-JNGiNldJIeMe-K0vtNvWNn-5 X-Proofpoint-GUID: bmjCYU9-JNGiNldJIeMe-K0vtNvWNn-5 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1095,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-04-01_03,2025-03-27_02,2024-11-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 mlxscore=0 priorityscore=1501 phishscore=0 spamscore=0 impostorscore=0 clxscore=1015 mlxlogscore=883 bulkscore=0 malwarescore=0 suspectscore=0 lowpriorityscore=0 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2502280000 definitions=main-2504010054 On 3/28/2025 6:21 PM, Dmitry Baryshkov wrote: > On Thu, Mar 27, 2025 at 11:47:49PM +0530, Sricharan R wrote: >> From: Sricharan Ramabadhran >> >> TMEL(Trust Management Engine Lite) subsystem provides different kinds of > > Trust whatever SubSystem (TMEL SS) ... > > different to what? > To the ARM TrustZone firmware(TZ). So these services (secureboot, image authentication etc) were provided by the TZ in some SOCs. Here, TMEL provides those. Can add those details here. >> services like secureboot, remote image authentication, key management, >> crypto, OEM provisioning etc. >> >> The QMP mailbox is the primary means of communication between TMEL SS and > > What is QMP? Qualcomm Messaging Protocol > >> other subsystem on the SoC. A dedicated pair of inbound and outbound >> mailboxes is implemented for each subsystem/external execution environment > > Is it implemented in the driver? Is it provided by the hardware? By the > firmware? > TMEL firmware provides and processes the inbound requests and responds back on the outbound channel. Can mention this explicitly in the above. Regards, Sricharan