linux-kernel - [PATCH 3/3] arm64: dts: qcom: add few more reserved memory region

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Message-ID: <20230526110653.27777-4-quic_viswanat@quicinc.com>
Date:   Fri, 26 May 2023 16:36:53 +0530
From:   Vignesh Viswanathan <quic_viswanat@...cinc.com>
To:     <agross@...nel.org>, <andersson@...nel.org>,
        <konrad.dybcio@...aro.org>, <lee@...nel.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>,
        <linux-arm-msm@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
CC:     <quic_kathirav@...cinc.com>, <quic_anusha@...cinc.com>,
        <quic_sjaganat@...cinc.com>, <quic_srichara@...cinc.com>,
        <quic_varada@...cinc.com>,
        Vignesh Viswanathan <quic_viswanat@...cinc.com>
Subject: [PATCH 3/3] arm64: dts: qcom: add few more reserved memory region

In IPQ SoCs, bootloader will collect the system RAM contents upon crash
for the post morterm analysis. If we don't reserve the memory region used
by bootloader, obviously linux will consume it and upon next boot on
crash, bootloader will be loaded in the same region, which will lead to
loose some of the data, sometimes we may miss out critical information.
So lets reserve the region used by the bootloader.

Similarly SBL copies some data into the reserved region and it will be
used in the crash scenario. So reserve 1MB for SBL as well.

While at it, drop the size padding in the reserved memory region,
wherever applicable.

Signed-off-by: Vignesh Viswanathan <quic_viswanat@...cinc.com>
---
 arch/arm64/boot/dts/qcom/ipq6018.dtsi | 16 +++++++++++++---
 arch/arm64/boot/dts/qcom/ipq8074.dtsi | 14 ++++++++++++--
 2 files changed, 25 insertions(+), 5 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/ipq6018.dtsi b/arch/arm64/boot/dts/qcom/ipq6018.dtsi
index 2d77a8336111..fc64a5efbe2c 100644
--- a/arch/arm64/boot/dts/qcom/ipq6018.dtsi
+++ b/arch/arm64/boot/dts/qcom/ipq6018.dtsi
@@ -156,18 +156,28 @@ rpm_msg_ram: memory@...00 {
 			no-map;
 		};
 
+		bootloader@...00000 {
+			reg = <0x0 0x4a100000 0x0 0x400000>;
+			no-map;
+		};
+
+		sbl@...00000 {
+			reg = <0x0 0x4a500000 0x0 0x100000>;
+			no-map;
+		};
+
 		tz: memory@...00000 {
-			reg = <0x0 0x4a600000 0x0 0x00400000>;
+			reg = <0x0 0x4a600000 0x0 0x400000>;
 			no-map;
 		};
 
 		smem_region: memory@...00000 {
-			reg = <0x0 0x4aa00000 0x0 0x00100000>;
+			reg = <0x0 0x4aa00000 0x0 0x100000>;
 			no-map;
 		};
 
 		q6_region: memory@...00000 {
-			reg = <0x0 0x4ab00000 0x0 0x05500000>;
+			reg = <0x0 0x4ab00000 0x0 0x5500000>;
 			no-map;
 		};
 	};
diff --git a/arch/arm64/boot/dts/qcom/ipq8074.dtsi b/arch/arm64/boot/dts/qcom/ipq8074.dtsi
index 00e559de00fb..0793b691a095 100644
--- a/arch/arm64/boot/dts/qcom/ipq8074.dtsi
+++ b/arch/arm64/boot/dts/qcom/ipq8074.dtsi
@@ -86,17 +86,27 @@ reserved-memory {
 		#size-cells = <2>;
 		ranges;
 
+		bootloader@...00000 {
+			reg = <0x0 0x4a600000 0x0 0x400000>;
+			no-map;
+		};
+
+		sbl@...00000 {
+			reg = <0x0 0x4aa00000 0x0 0x100000>;
+			no-map;
+		};
+
 		smem@...00000 {
 			compatible = "qcom,smem";
-			reg = <0x0 0x4ab00000 0x0 0x00100000>;
+			reg = <0x0 0x4ab00000 0x0 0x100000>;
 			no-map;
 
 			hwlocks = <&tcsr_mutex 0>;
 		};
 
 		memory@...00000 {
+			reg = <0x0 0x4ac00000 0x0 0x400000>;
 			no-map;
-			reg = <0x0 0x4ac00000 0x0 0x00400000>;
 		};
 	};
 
-- 
2.40.1