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[98.219.206.88]) by smtp.gmail.com with ESMTPSA id af79cd13be357-7c5568480d8sm476215785a.91.2025.03.12.12.40.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 12 Mar 2025 12:40:36 -0700 (PDT) Date: Wed, 12 Mar 2025 15:40:35 -0400 From: Brian Masney To: Christopher Obbard Cc: Krzysztof Kozlowski , Dmitry Baryshkov , Catalin Marinas , Will Deacon , Bjorn Andersson , Konrad Dybcio , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org Subject: Re: [PATCH] arm64: defconfig: Enable Qualcomm interconnects as built-in Message-ID: References: <20250311-wip-obbardc-qcom-defconfig-interconnects-builtin-v1-1-675b6bc57176@linaro.org> <92dd35a2-d1cc-4f2b-b3a8-5752ec33b0d3@kernel.org> MIME-Version: 1.0 In-Reply-To: User-Agent: Mutt/2.2.14 (2025-02-20) X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: 5DLQX6-qzovpOODrptDZebCaQIW-wGqPkqelpEA4-hA_1741808438 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250312_124212_904766_5E20562D X-CRM114-Status: GOOD ( 12.91 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Christopher, On Wed, Mar 12, 2025 at 12:10:56PM +0100, Christopher Obbard wrote: > For reference, I am working on updating initramfs generation tools in > Debian/Fedora to include the required interconnect modules. Currently > the interconnect drivers are built as modules in these distros, but > are not included in the initrd. That is where my confusion initially > stemmed from. >From a Fedora and centos-stream-9/10 perspective, we have dracut updated so that the interconnect modules are included in the initramfs by default. https://github.com/dracutdevs/dracut/blob/master/modules.d/90kernel-modules/module-setup.sh#L74 Let me know if you are seeing a specific issue with the initramfs on Fedora and I can help you. We also configured all of the QC pinctrl drivers to be modules in Fedora, and this causes a large number of probe deferrals on boot up. One of the boots I measured was about a half second: https://lore.kernel.org/linux-embedded/Z6J3WpeJKIKENC81@x13s/ Everything eventually loads and works as expected though. The upstream defconfig configures most of the pinctrl drivers to be built in for Qualcomm. Brian