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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b8037ad1e6dsm3364893666b.21.2025.12.29.04.41.51 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 29 Dec 2025 04:41:52 -0800 (PST) Message-ID: Date: Mon, 29 Dec 2025 13:41:50 +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 1/2] arm64: dts: qcom: agatti: Fix IOMMU DT properties To: Sumit Garg , linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org Cc: andersson@kernel.org, konradybcio@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, akhilpo@oss.qualcomm.com, vikash.garodia@oss.qualcomm.com, dikshita.agarwal@oss.qualcomm.com, robin.clark@oss.qualcomm.com, lumag@kernel.org, linux-kernel@vger.kernel.org, Sumit Garg , Prakash Gupta References: <20251229071258.456254-1-sumit.garg@kernel.org> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20251229071258.456254-1-sumit.garg@kernel.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMjI5MDExOCBTYWx0ZWRfX+dUomEp+U+HL N0+N9/HExk+WiG2oWrW6jvPZVCA1hEIWazl62jCrPhYnZXoDDHZccz/wpfTUUxNt7ME+VPV9bQd TRd6YfMbhBqaesQYURXCYc2Gninh4/YIRkgN44ou3EJngREeqlt6nrPs2qpHLnv4Zi11rjkKOpF bknZHCJmKj0vo517D1iELXHTX32qfgMvLtRYjfMF0hcTZ//+1uiviUbDDuw8a5+4tq6cvD+ZL4n 5h6NgvfbgUW9OI4ET6Hy2TJu5XTnqyNIlvfRAEmr7GfudoFJGCTon8CYhS7M+wN7+ydL83J4QeB yQSxgAYD7n0T22kL8Yx4NB4rUysblcMYgj5Ov4LwNaPI0jkQ+R/A17PRxxU69R8NvfRBdLrWwcU DdL5E9ouf6tybCUovn7p6UULBN8NsBNkP0NDBBT2UaJXV3bsdvT7LofEVRHIW62BSR586FgNBAH +eSpFVm6DonqXyw4OTA== X-Authority-Analysis: v=2.4 cv=VdP6/Vp9 c=1 sm=1 tr=0 ts=69527713 cx=c_pps a=JbAStetqSzwMeJznSMzCyw==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=wP3pNCr1ah4A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=EUspDBNiAAAA:8 a=gEHfgoT47xnI8piDJ0QA:9 a=QEXdDO2ut3YA:10 a=uxP6HrT_eTzRwkO_Te1X:22 X-Proofpoint-GUID: -eaeuyEp8OPd-luoObX7-5_mEfRaXuwS X-Proofpoint-ORIG-GUID: -eaeuyEp8OPd-luoObX7-5_mEfRaXuwS X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2025-12-29_04,2025-12-29_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 spamscore=0 phishscore=0 lowpriorityscore=0 bulkscore=0 adultscore=0 clxscore=1015 malwarescore=0 suspectscore=0 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2512120000 definitions=main-2512290118 On 12/29/25 8:12 AM, Sumit Garg wrote: > From: Sumit Garg > > Fix IOMMU DT propeties for GPU, display and video peripherals via > dropping SMMU stream IDs which relates to secure context bank. > > This problem only surfaced when the Gunyah based firmware stack is > ported on Agatti replacing the legacy QHEE based firmware stack. Assigning > Linux kernel (HLOS) VMID to secure context bank stream IDs is treated > as a fault by Gunyah hypervisor which were previously ignored by QHEE > hypervisor. > > The DT changes should be backwards compatible with legacy QHEE based > firmware stack too. > > Suggested-by: Prakash Gupta > Signed-off-by: Sumit Garg > --- This will need to be resolved by something like iommu-map anyway Reviewed-by: Konrad Dybcio Konrad