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Piccoli" , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org Subject: [PATCH] arm64: dts: exynos: Add reserved memory for pstore on E850-96 Date: Sat, 7 Oct 2023 22:36:33 -0500 Message-Id: <20231008033633.21304-1-semen.protsenko@linaro.org> X-Mailer: git-send-email 2.39.2 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231007_203636_827238_F9708322 X-CRM114-Status: GOOD ( 10.00 ) 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 Reserve a 2 MiB memory region to record kmsg dumps, console, ftrace and userspace messages. The implemented memory split allows capturing and reading corresponding ring buffers: * dmesg: 6 dumps, 128 KiB each * console: 128 KiB * ftrace: 128 KiB for each of 8 CPUs (1 MiB total) * userspace messages: 128 KiB Signed-off-by: Sam Protsenko --- arch/arm64/boot/dts/exynos/exynos850-e850-96.dts | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/arch/arm64/boot/dts/exynos/exynos850-e850-96.dts b/arch/arm64/boot/dts/exynos/exynos850-e850-96.dts index 8d733361ef82..d54c8fa55c09 100644 --- a/arch/arm64/boot/dts/exynos/exynos850-e850-96.dts +++ b/arch/arm64/boot/dts/exynos/exynos850-e850-96.dts @@ -59,6 +59,21 @@ memory@80000000 { <0x8 0x80000000 0x80000000>; }; + reserved-memory { + #address-cells = <2>; + #size-cells = <1>; + ranges; + + ramoops@f0000000 { + compatible = "ramoops"; + reg = <0x0 0xf0000000 0x200000>; + record-size = <0x20000>; + console-size = <0x20000>; + ftrace-size = <0x100000>; + pmsg-size = <0x20000>; + }; + }; + gpio-keys { compatible = "gpio-keys"; pinctrl-names = "default";