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Sun, 18 Feb 2024 23:44:05 -0800 (PST) Received: from [192.168.1.20] ([178.197.222.116]) by smtp.gmail.com with ESMTPSA id h7-20020a05600c314700b004126170a23csm4501357wmo.7.2024.02.18.23.44.04 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 18 Feb 2024 23:44:05 -0800 (PST) Message-ID: <15ab6aa6-fb30-4970-9c50-546afb933e03@linaro.org> Date: Mon, 19 Feb 2024 08:44:03 +0100 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] ARM: dts: exynos4212-tab3: limit usable memory range Content-Language: en-US To: Artur Weber , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Alim Akhtar Cc: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, ~postmarketos/upstreaming@lists.sr.ht References: <20240217-tab3-limit-usable-memory-range-v1-1-49cc9c86a5cc@gmail.com> From: Krzysztof Kozlowski Autocrypt: addr=krzysztof.kozlowski@linaro.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 17/02/2024 20:02, Artur Weber wrote: > The stock bootloader on the Samsung Galaxy Tab 3 8.0 provides an > incorrect available memory range over ATAG_MEM. Limit the usable > memory in the DTS to prevent it from doing so, without having to > disable ATAG support. > > Signed-off-by: Artur Weber > --- > arch/arm/boot/dts/samsung/exynos4212-tab3.dtsi | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/arch/arm/boot/dts/samsung/exynos4212-tab3.dtsi b/arch/arm/boot/dts/samsung/exynos4212-tab3.dtsi > index e5254e32aa8f..9bc05961577d 100644 > --- a/arch/arm/boot/dts/samsung/exynos4212-tab3.dtsi > +++ b/arch/arm/boot/dts/samsung/exynos4212-tab3.dtsi > @@ -45,6 +45,12 @@ chosen { > /* Default S-BOOT bootloader loads initramfs here */ > linux,initrd-start = <0x42000000>; > linux,initrd-end = <0x42800000>; > + > + /* > + * Stock bootloader provides incorrect memory size in ATAG_MEM; > + * override it here > + */ > + linux,usable-memory-range = <0x40000000 0x3fc00000>; Applied and dropped: chosen: linux,usable-memory-range:0: [4611686019496935424] is too short Does not look you tested the bindings. Please observe that we have dedicated subsystem profile since a release: https://www.kernel.org/doc/html/latest/process/maintainers.html#arm-samsung-s3c-s5p-and-exynos-arm-architectures Best regards, Krzysztof