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Mon, 22 Jun 2026 06:55:03 +0000 Date: Mon, 22 Jun 2026 07:55:03 +0100 Message-ID: <8633yfrrnc.wl-maz@kernel.org> From: Marc Zyngier To: Marek Vasut Cc: Thomas Gleixner , linux-pci@vger.kernel.org, Yoshihiro Shimoda , Krzysztof =?UTF-8?B?V2lsY3p5?= =?UTF-8?B?xYRza2k=?= , Bjorn Helgaas , Catalin Marinas , Conor Dooley , Geert Uytterhoeven , Krzysztof Kozlowski , Lorenzo Pieralisi , Manivannan Sadhasivam , Rob Herring , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-renesas-soc@vger.kernel.org Subject: Re: [PATCH v2 3/4] irqchip/gic-v3: Add Renesas R-Car Gen4 erratum workaround In-Reply-To: References: <20260618220427.14325-1-marek.vasut+renesas@mailbox.org> <20260618220427.14325-4-marek.vasut+renesas@mailbox.org> <87cxxkma5p.ffs@fw13> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM-LB/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL-LB/10.8 EasyPG/1.0.0 Emacs/30.1 (aarch64-unknown-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: marek.vasut@mailbox.org, tglx@kernel.org, linux-pci@vger.kernel.org, yoshihiro.shimoda.uh@renesas.com, kwilczynski@kernel.org, bhelgaas@google.com, catalin.marinas@arm.com, conor+dt@kernel.org, geert+renesas@glider.be, krzk+dt@kernel.org, lpieralisi@kernel.org, mani@kernel.org, robh@kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-renesas-soc@vger.kernel.org X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false 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 On Sun, 21 Jun 2026 23:46:25 +0100, Marek Vasut wrote: > > On 6/21/26 12:59 PM, Thomas Gleixner wrote: > > On Fri, Jun 19 2026 at 00:02, Marek Vasut wrote: > >> Renesas R-Car S4/V4H/V4M GIC600 integration has address width for AXI > >> or APB interface configured to 32 bit, it can therefore access only > >> the first 4 GiB of physical address space. This information comes from > >> R-Car V4H Interface Specification sheet, there is currently no technical > >> update number assigned to this limitation. Further input from hardware > >> engineer indicates that this limitation also applies to R-Car S4 and V4M. > >> Name the limitation GEN4GICITS1, and add a driver quirk to mitigate this > >> limitation. > >> > >> The quirk is keyed on the combination of the GIC implementation > >> and the platform identification in the device tree. > >> > >> Signed-off-by: Yoshihiro Shimoda > >> Signed-off-by: Marek Vasut > > > > This SOB chain is broken. > > Broken ? I don't understand , could you please elaborate ? Either Shimoda-san is the sole author of the change and you are posting their work, then the first line of the patch should say: From: Yoshihiro Shimoda with your own SoB immediately following their SoB (see [1]). Or this has been co-developed, and both of you should be credited as authors. then Shimoda-san's SoB should be preceded by their Co-developed-by: tag (see [2]). Co-developed-by: Yoshihiro Shimoda Signed-off-by: Yoshihiro Shimoda Signed-off-by: Marek Vasut This shows exactly who did what, who forwarded whose patch, and forms the base of the DCO which is documented at [3]. Thanks, M. [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/submitting-patches.rst#n449 [2] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/submitting-patches.rst#n503 [3] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/submitting-patches.rst#n396 -- Without deviation from the norm, progress is not possible.