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Mon, 26 Oct 2026 03:10:28 -0700 (PDT) Received: from [192.168.226.26] ([178.235.128.140]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-c46bd66fa59sm293589166b.61.2026.10.26.03.10.26 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 26 Oct 2026 03:10:28 -0700 (PDT) Message-ID: Date: Mon, 26 Oct 2026 11:10:26 +0100 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] arm64: dts: qcom: monaco: reserve firmware carve-outs To: Tyler Baker , Bjorn Andersson , Konrad Dybcio , Abel Vesa , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20261024-monaco-fw-carveouts-v1-1-1cd68aedf46d@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20261024-monaco-fw-carveouts-v1-1-1cd68aedf46d@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-Spam-Info: AW1haW4tMjYxMDI2MDA0MCBTYWx0ZWRfX0RwiAlqm/AXm CMge9brpOCvD745sYwYoSn3PcvsVESbRnSIAfHWZddOxn+b8uMohP+Q69xT0vwu/vBXRH+lVJoe YMq1QGsAa43C1GLsAC8wHq9B+XntKpo= X-Proofpoint-GUID: Fmx2Cg-zNIo--5yZVphcAtFNeWAnxKtv X-Authority-Analysis: v=2.4 cv=c+8+0h9l c=1 sm=1 tr=0 ts=6adf2716 cx=c_pps a=qKBjSQ1v91RyAK45QCPf5w==:117 a=PRfkaYvzSr8QmIIGAkY2Sg==:17 a=IkcTkHD0fZMA:10 a=660iZSQnnn4A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=DJpcGTmdVt4CTyJn9g5Z:22 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=MOOwgwI-Wrxjjh533TEA:9 a=QEXdDO2ut3YA:10 a=NFOGd7dJGGMPyQGDc5-O:22 X-Proofpoint-ORIG-GUID: Fmx2Cg-zNIo--5yZVphcAtFNeWAnxKtv X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMDI2MDA0MCBTYWx0ZWRfX14If1YV3tQ2c +6ZnW+mTp6hZSelFt1qMacse2sD3OBBi1V9W3g0wJzItYGlEWg6z2vWl2ZYQLa85voOVPNd5zfi XhTYjO+pN8R7KOfSWyKu0B+qdE8WIVuHBxdP0iIiUI6DGIsEP+oAH9QtRVnUYeiIE73EIXGrpiC Os5XOu6UNDdSTRXbq4/mjHX23M5vepIwwX6T3j7cHvbEa15jrKKHGrCax9JTiv8wuWCo3d4AUL/ RKrx31a+QQf0DVUuA80ZhvdKa6FgQriDx+F9EzI+r+LEcgf73mN/s40C9w6s6uhZGc8yprnS6eQ cocqTBGeBXcZPknromtkhqxAsA8HWDg0f0QFgVak5qCsP8sZJuUDyIUIcWh7qcEQGKIab0rhUO2 2zGPdGrsheAbSqxDdjDS0POjmjSFQzwykVvp2kbfy26M/CyWfDeSnpezJpIjuiSJeQXOyRXU62+ Tng1i53VI72IyiHkPPA== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.138,FMLib:17.12.100.49 definitions=2026-10-26_01,2026-10-21_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 lowpriorityscore=0 clxscore=1015 priorityscore=1501 suspectscore=0 adultscore=0 phishscore=0 impostorscore=0 spamscore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2610190000 definitions=main-2610260040 On 10/25/26 2:09 AM, Tyler Baker wrote: > monaco.dtsi does not reserve the DDR carve-outs used by firmware at > runtime. > > The downstream UEFI hides these from the OS. U-Boot as the EFI firmware > [0] builds its memory map from the SMEM DDR banks, which do not list > them, so it hands them to Linux as RAM, and the first write to one of > those pages takes an SError. > > Reserve them as no-map, at the base and size the QCS8300 boot binaries > use, as lemans.dtsi does. > > Link: https://lore.kernel.org/r/20260928-monaco-ventuno-q-v2-0-0e046c8242be@oss.qualcomm.com [0] > Signed-off-by: Tyler Baker > --- > Tested on the Arduino VENTUNO Q with U-Boot as the EFI firmware and > with the downstream UEFI, which already withholds these regions. > --- Reviewed-by: Konrad Dybcio Konrad