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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-bd4f4c23feasm212857866b.14.2026.05.15.03.54.37 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 15 May 2026 03:54:38 -0700 (PDT) Message-ID: <02578386-a492-4342-95aa-9cfb00c8bacd@oss.qualcomm.com> Date: Fri, 15 May 2026 12:54:37 +0200 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 3/3] interconnect: qcom: Make important drivers default To: Krzysztof Kozlowski , Georgi Djakov , Bjorn Andersson , Konrad Dybcio Cc: linux-arm-msm@vger.kernel.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org References: <20260428-interconnect-qcom-clean-arm64-v1-0-e6bc3f7832db@oss.qualcomm.com> <20260428-interconnect-qcom-clean-arm64-v1-3-e6bc3f7832db@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Authority-Analysis: v=2.4 cv=HbkkiCE8 c=1 sm=1 tr=0 ts=6a06fb71 cx=c_pps a=KB4UBwrhAZV1kjiGHFQexw==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=NGcC8JguVDcA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=yOCtJkima9RkubShWh1s:22 a=HltSbr2RFzsJciUvgNYA:9 a=QEXdDO2ut3YA:10 a=o1xkdb1NAhiiM49bd1HK:22 X-Proofpoint-GUID: O0x2mYxakLYfRlnWpLQiNkrwt1BWW1Gk X-Proofpoint-ORIG-GUID: O0x2mYxakLYfRlnWpLQiNkrwt1BWW1Gk X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNTE1MDExMCBTYWx0ZWRfX08l0nYi+jdvQ Hzz0qddSLSYYCWXeTUcZw22/cxTbSHZiYg0Peq8h3kWvdBCcD8Arqd+IXaJLHuOyHNNVuAdxcqG Oa+q2ILEuGk+csWRAk3ff4fR6RS0HZYL2TaQ6MKtnlY8F8v52ZhW9xVKGK/pkjAXWZCiUOxheDK 1CmNJ898ueXW2ABYBAfI6S4qhmZZ53goiHYfEAzNLOxLXyxknbPRGic0ceFOx+uIX1eF8wZWIgq iOIdOsub1EqJxxyyvTySnTmTS4W6KgqlCNQegy+OOZ3AGpAHU5ZRCkxjen6dspmCIj8130tH2+/ X9riDls1K5Y8TtZWTR6MxD45GMxUNs0x5fnT9N6iGr5ZIaM/YJGfI0ZCDEZxfv/avD0bvoyNIOE TLLuYSefsEFO/6rbgEVjuHx1CrCZ3Yh8Ztea1sqwkzrbCqkpF8Edv8ES9k9dKrOlHUMC/HA9grp MZmnEoQdPFBgzkOOiPQ== 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=2026-05-15_02,2026-05-13_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 priorityscore=1501 spamscore=0 adultscore=0 suspectscore=0 bulkscore=0 clxscore=1015 impostorscore=0 malwarescore=0 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2605130000 definitions=main-2605150110 On 4/29/26 5:09 PM, Krzysztof Kozlowski wrote: > On 29/04/2026 11:23, Konrad Dybcio wrote: >> On 4/28/26 7:32 PM, Krzysztof Kozlowski wrote: >>> The interconnect drivers for Qualcomm SoC Network-on-Chip are covering a >>> basic or fundamental SoC feature: bandwidth management between internal >>> SoC blocks. SoC can boot without these, but power management or >>> performance will be affected. These drivers do not represent any sort >>> of buses visible to the board designers/configurators, thus they should >>> be always enabled, regardless how SoC is used in the final board. >>> >>> Kernel configuration should not ask users choice of drivers when that >>> choice is obvious and known to the developers that answer should be >>> 'yes' or 'module'. >> >> I'd say let's make them all `default ARCH_QCOM` - all of these drivers >> are required to boot (minus the OSM_L3 driver which is "only" highly >> desired, so that your CPU's bus isn't heavily bottlenecked) > > So the few of them should not be a module? That's what you want to say? I'm saying that if you only want to shoot yourself in the foot and not in the face, you can make them modules But the L3 driver is required to make the caches run at a reasonable speed, so that they don't bottleneck the rest of the system's mem bandwidth Konrad