linux-hardening - [PATCH v4 16/21] arm64: dts: qcom: sm8450: Add Qualcomm ramoops minidump node

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Message-ID: <1687955688-20809-17-git-send-email-quic_mojha@quicinc.com>
Date:   Wed, 28 Jun 2023 18:04:43 +0530
From:   Mukesh Ojha <quic_mojha@...cinc.com>
To:     <corbet@....net>, <agross@...nel.org>, <andersson@...nel.org>,
        <konrad.dybcio@...aro.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>,
        <keescook@...omium.org>, <tony.luck@...el.com>,
        <gpiccoli@...lia.com>, <mathieu.poirier@...aro.org>,
        <catalin.marinas@....com>, <will@...nel.org>,
        <linus.walleij@...aro.org>, <andy.shevchenko@...il.com>
CC:     <linux-doc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-msm@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-hardening@...r.kernel.org>,
        <linux-remoteproc@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-gpio@...r.kernel.org>,
        "Mukesh Ojha" <quic_mojha@...cinc.com>
Subject: [PATCH v4 16/21] arm64: dts: qcom: sm8450: Add Qualcomm ramoops minidump node

This enable dynamic reserve memory for Qualcomm ramoops device,
which will be used to save ramoops frontend data and this region
gets dumped on crash via Qualcomm's minidump infrastructure.
qcom_pstore_minidump is the associated driver for this node.

Signed-off-by: Mukesh Ojha <quic_mojha@...cinc.com>
---
 arch/arm64/boot/dts/qcom/sm8450.dtsi | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sm8450.dtsi b/arch/arm64/boot/dts/qcom/sm8450.dtsi
index d59ea8ee7111..0b1dedee606b 100644
--- a/arch/arm64/boot/dts/qcom/sm8450.dtsi
+++ b/arch/arm64/boot/dts/qcom/sm8450.dtsi
@@ -390,6 +390,12 @@
 		};
 	};
 
+	ramoops-minidump {
+		compatible = "qcom,sm8450-ramoops", "qcom,ramoops";
+		console-size = <0x200000>;
+		memory-region = <&qcom_ramoops>;
+	};
+
 	reserved_memory: reserved-memory {
 		#address-cells = <2>;
 		#size-cells = <2>;
@@ -623,6 +629,12 @@
 			reg = <0x0 0xed900000 0x0 0x3b00000>;
 			no-map;
 		};
+
+		qcom_ramoops: ramoops {
+			alloc-ranges = <0x0 0x00000000 0xffffffff 0xffffffff>;
+			size = <0x0 0x200000>;
+			no-map;
+		};
 	};
 
 	smp2p-adsp {
-- 
2.7.4