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[74.125.226.235]) by smtp.gmail.com with ESMTPSA id 71dfb90a1353d-5c9f04fb621sm2438490e0c.9.2026.09.23.00.38.02 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 23 Sep 2026 00:38:02 -0700 (PDT) Received: by mail-ua2-f43.google.com with SMTP id a1e0cc1a2514c-97eaa1155b1so340892241.3 for ; Wed, 23 Sep 2026 00:38:02 -0700 (PDT) X-Forwarded-Encrypted: i=1; AKwUvBxIi3DKzaNeGa70ZFxXpwcV4FaRkXK7ToHOYzgVOMVbtL5tr8mXiQiPcBI1v0Atqx3fHzDIs/ZC3Cqgz6s=@vger.kernel.org X-Received: by 2002:a05:6102:50a6:b0:7a4:fb71:25d1 with SMTP id ada2fe7eead31-7ac1a6c6e37mr1941921137.7.1790149082786; Wed, 23 Sep 2026 00:38:02 -0700 (PDT) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 References: <20260916220801.240796-1-marek.vasut+renesas@mailbox.org> In-Reply-To: <20260916220801.240796-1-marek.vasut+renesas@mailbox.org> From: Geert Uytterhoeven Date: Wed, 23 Sep 2026 09:37:51 +0200 X-Gmail-Original-Message-ID: X-Gm-Features: AclHuK-KliAgyjEnFc7fc7G0ednHxc9gvY5BOag4zMrSEzrWijgeZD9Diiyx23U Message-ID: Subject: Re: [PATCH] arm64: dts: renesas: ironhide: Align inline ECC carveout sizes with bootloader settings To: Marek Vasut Cc: linux-arm-kernel@lists.infradead.org, Conor Dooley , Geert Uytterhoeven , Krzysztof Kozlowski , Magnus Damm , Rob Herring , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-renesas-soc@vger.kernel.org Content-Type: text/plain; charset="UTF-8" On Thu, 17 Sept 2026 at 00:08, Marek Vasut wrote: > The DBSC5 DRAM controller protects DRAM content using inline ECC. The > current set of carveouts follows SoC documentation, which describes the > three trailing carveouts as larger than the rest. > > Both the downstream IPL and mainline U-Boot on RSIP configure the ECC > carveouts to the same size for all eight carveouts. Align the carveout > sizes with the controller configuration set by the bootloader. > > This makes 1638 MiB of DRAM available for each of the three carveouts, > which adds up to a total of 4915 MiB of newly accessible DRAM on this > platform with this fix. > > Making this memory available does not pose a danger, since the current > set of carveouts were carefully set to a larger size to prevent any > possible issues until a confirmation from the hardware team become > available, that it is safe to apply these less restrictive settings. > > Fixes: 6fa6ee724d8d ("arm64: dts: renesas: ironhide: Describe inline ECC carveouts") > Signed-off-by: Marek Vasut >From the review thread on the original: Tested-by: Geert Uytterhoeven Reviewed-by: Geert Uytterhoeven i.e. will queue in renesas-devel for v7.4. Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds