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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-658b46ac0e8sm1431956a12.34.2026.01.28.04.19.10 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 28 Jan 2026 04:19:11 -0800 (PST) Message-ID: <7a3541f8-079e-459a-9f30-cb20002e75f8@oss.qualcomm.com> Date: Wed, 28 Jan 2026 13:19:09 +0100 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 v2 2/3] arm64: dts: qcom: monaco: Add EL2 overlay To: Mukesh Ojha , Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20260127-talos-el2-overlay-v2-0-b6a2266532c4@oss.qualcomm.com> <20260127-talos-el2-overlay-v2-2-b6a2266532c4@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20260127-talos-el2-overlay-v2-2-b6a2266532c4@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-GUID: DS1t4v9u4Q-6_bu3AFWKnfjR8i2ExX2a X-Authority-Analysis: v=2.4 cv=Z4Dh3XRA c=1 sm=1 tr=0 ts=6979fec1 cx=c_pps a=7E5Bxpl4vBhpaufnMqZlrw==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=vUbySO9Y5rIA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=EUspDBNiAAAA:8 a=sdnczi_gjX_ezsEsx7EA:9 a=QEXdDO2ut3YA:10 a=eSe6kog-UzkA:10 a=pJ04lnu7RYOZP9TFuWaZ:22 X-Proofpoint-ORIG-GUID: DS1t4v9u4Q-6_bu3AFWKnfjR8i2ExX2a X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMTI4MDEwMSBTYWx0ZWRfX2dFuij7Pdrx4 IpgAFToWsmO1ZMRf9HrTrnDG750Cm/fqPBwUkD9DV4+sREzZJ4zzBX0jngQCDpDCUjXKJUQbKd8 yp5+TV42peSk3XmpcamE1Q5ec9zcX+SJ/69zbvEynH2eJwQkyqXVwrlljNed14buCLc1vRxMM5P SIO60o0vKhn/AjYpYZtmpUfLwrcUI5ibYhIht4FC1KfTiqZ1kL2iGQKCiGezeKKkztAzC2Ectwm 3dt7DQxlD7o9cYVMetVGLHU6sJoY1gl1ZMDTRKku6LoHWDK+fIxkX6GAHyAceXLhgJ4KqUjHKj1 fDMgFEtwBfKyHlNWavGrbK32ry/dBfbJQsjIrhpsaJFhGwablI58aeDB6OUm4Q/3fZ4xpZD2MIn cumlQ4+iMsjpjDqYCWb8VDjsh8LSQkOU7dLO/ZhSgwO/c4kRWmliJ9YFg0Hwr8rXPQ28wsS5RU0 tMWVbWuQH3ndXT8Z1vQ== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-01-28_02,2026-01-28_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 suspectscore=0 lowpriorityscore=0 clxscore=1015 impostorscore=0 adultscore=0 priorityscore=1501 spamscore=0 bulkscore=0 phishscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2601150000 definitions=main-2601280101 On 1/27/26 12:43 PM, Mukesh Ojha wrote: > All the Monaco IOT variants boards are using Gunyah hypervisor which > means that, so far, Linux-based OS could only boot in EL1 on those > devices. However, it is possible for us to boot Linux at EL2 on these > devices [1]. > > When running under Gunyah, the remote processor firmware IOMMU streams > are controlled by Gunyah. However, without Gunyah, the IOMMU is managed > by the consumer of this DeviceTree. Therefore, describe the firmware > streams for each remote processor. > > Add a EL2-specific DT overlay and apply it to Monaco IOT variant > devices to create -el2.dtb for each of them alongside "normal" dtb. > > [1] > https://docs.qualcomm.com/bundle/publicresource/topics/80-70020-4/boot-developer-touchpoints.html#uefi > > Signed-off-by: Mukesh Ojha > --- Reviewed-by: Konrad Dybcio Konrad