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[94.246.207.146]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-54b094bb344sm1364786e87.37.2025.04.01.06.16.40 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 01 Apr 2025 06:16:47 -0700 (PDT) Message-ID: <9efea174-80db-4e5c-b0a9-4c5fbc7e166a@oss.qualcomm.com> Date: Tue, 1 Apr 2025 16:16:36 +0300 Precedence: bulk X-Mailing-List: linux-arm-msm@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: Sricharan Ramabadhran Cc: 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, andersson@kernel.org, konradybcio@kernel.org, manivannan.sadhasivam@linaro.org, dmitry.baryshkov@linaro.org References: <20250327181750.3733881-1-quic_srichara@quicinc.com> <20250327181750.3733881-2-quic_srichara@quicinc.com> <479b9613-8244-4a29-9735-cec47e473946@quicinc.com> Content-Language: en-US From: Dmitry Baryshkov In-Reply-To: <479b9613-8244-4a29-9735-cec47e473946@quicinc.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Authority-Analysis: v=2.4 cv=UL3dHDfy c=1 sm=1 tr=0 ts=67ebe742 cx=c_pps a=50t2pK5VMbmlHzFWWp8p/g==:117 a=aVIEJrXLnI925Kw8RqJ2Kw==:17 a=IkcTkHD0fZMA:10 a=XR8D0OoHHMoA:10 a=0xp6LphHLZRkLrDefq0A:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=IoWCM6iH3mJn3m4BftBB:22 X-Proofpoint-ORIG-GUID: cAfK8-zlu3HRlsXnVwjGh3fD0F59wfon X-Proofpoint-GUID: cAfK8-zlu3HRlsXnVwjGh3fD0F59wfon 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_05,2025-03-27_02,2024-11-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 adultscore=0 malwarescore=0 mlxlogscore=790 phishscore=0 impostorscore=0 lowpriorityscore=0 priorityscore=1501 spamscore=0 bulkscore=0 clxscore=1015 suspectscore=0 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2502280000 definitions=main-2504010082 On 01/04/2025 14:26, Sricharan Ramabadhran wrote: > > [Resending, since my previous response had some wrapping issue] > >>> 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, > authentication etc) were provided by the TZ in some SOCs. Here, > TMEL provides those. Can add those details here. Yes, please (and all other answers too). > >> >>> 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 -- With best wishes Dmitry