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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b9d6de97e36sm400411166b.10.2026.04.14.02.29.41 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 14 Apr 2026 02:29:44 -0700 (PDT) Message-ID: Date: Tue, 14 Apr 2026 11:29:40 +0200 Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 06/11] media: iris: Fix VM count passed to firmware To: Vishnu Reddy , Bryan O'Donoghue , Vikash Garodia , Dikshita Agarwal , Abhinav Kumar , Mauro Carvalho Chehab , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Joerg Roedel , Will Deacon , Robin Murphy , Bjorn Andersson , Konrad Dybcio , Stefan Schmidt , Hans Verkuil Cc: linux-media@vger.kernel.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, iommu@lists.linux.dev, stable@vger.kernel.org References: <20260414-glymur-v1-0-7d3d1cf57b16@oss.qualcomm.com> <20260414-glymur-v1-6-7d3d1cf57b16@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20260414-glymur-v1-6-7d3d1cf57b16@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Authority-Analysis: v=2.4 cv=C9vZDwP+ c=1 sm=1 tr=0 ts=69de090b cx=c_pps a=7E5Bxpl4vBhpaufnMqZlrw==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=A5OVakUREuEA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=_K5XuSEh1TEqbUxoQ0s3:22 a=UlvO0n_oXqfwqGaIblEA:9 a=QEXdDO2ut3YA:10 a=pJ04lnu7RYOZP9TFuWaZ:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNDE0MDA4NyBTYWx0ZWRfX3wClmlPuwBmz oiVgzkOcxsxbbUwtwTwKKLyC3mpUSfkjJ4Q4iNmMwg3w+dnj+BzGNtvyEcWMwcq3BVucLqgVqmk mwC4Y8HAndbptTJj+tT4sHCtBIjppDob8Wzdj9rfbzoy9je2CkQoIyH9LslmaLCA5Fc6mc420VZ QUl7CY4ITVNukmuvv/+aJb5ub81JzA2EofmQNoUl1DvQBjavN754XVnT+TbRpXi2Ve3pIpRPZAB W/AoVe3jjPldBb+yhF7r9vjcRue8yGBVNxMR6OKF1ThyOqiAHDi+n72/9puTKscBf6CjNhmND8E giiGrsX216fpXZ+NYgC6X1rwQ5Vz8B8o5bWhW5Nvdg/0WLKDxbV4JxB4ywVKBLqQezrsy+8qlQC MMn6QScJwojtXiRojSpJz3LFdxgpZ1SLAAW3/JFQvtYnVAB98Jea9KSTA4b4vgdEjwM8AKPwAJ/ jSfu2F+wFfWoCZBA7lA== X-Proofpoint-GUID: P3mpKO0wM6PGuMUsg2XkwcOW0O5NH5vh X-Proofpoint-ORIG-GUID: P3mpKO0wM6PGuMUsg2XkwcOW0O5NH5vh X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-04-14_02,2026-04-13_04,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 suspectscore=0 clxscore=1015 malwarescore=0 lowpriorityscore=0 phishscore=0 bulkscore=0 spamscore=0 impostorscore=0 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604070000 definitions=main-2604140087 On 4/14/26 7:00 AM, Vishnu Reddy wrote: > On Glymur, firmware interprets the value written to CPU_CS_SCIACMDARG3 as > the number of virtual machines (VMs) and internally adds 1 to it. Writing > 1 causes firmware to treat it as 2 VMs. Since only one VM is required, > remove this write to leave the register at its reset value of 0. This does > not affect other platforms as only Glymur firmware uses this register, > earlier platform firmwares ignore it. Should we write a zero there, then? Konrad