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Message-Id: <20250406-tegra-pstore-v1-1-bf5b57f12293@gmail.com>
Date: Sun, 06 Apr 2025 16:12:43 -0500
From: Aaron Kling via B4 Relay <devnull+webgeek1234.gmail.com@...nel.org>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Thierry Reding <thierry.reding@...il.com>,
Jonathan Hunter <jonathanh@...dia.com>, Kees Cook <kees@...nel.org>,
Tony Luck <tony.luck@...el.com>,
"Guilherme G. Piccoli" <gpiccoli@...lia.com>
Cc: devicetree@...r.kernel.org, linux-tegra@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org,
Aaron Kling <webgeek1234@...il.com>
Subject: [PATCH] arm64: tegra: Enable ramoops on Tegra210 and newer
From: Aaron Kling <webgeek1234@...il.com>
This allows using pstore on all such platforms. There are some
differences per arch:
* Tegra132: Flounder does not appear to enumerate pstore and I do not
have access to norrin, thus Tegra132 is left out of this commit.
* Tegra210: Does not support ramoops carveouts in the bootloader, instead
relying on a dowstream driver to allocate the carveout, hence this
hardcodes a location matching what the downstream driver picks.
* Tegra186 and Tegra194 on cboot: Bootloader fills in the address and
size in a node specifically named /reserved-memory/ramoops_carveout,
thus these cannot be renamed.
* Tegra194 and Tegra234 on edk2: Bootloader looks up the node based on
compatible, however the dt still does not know the address, so keeping
the node name consistent on Tegra186 and newer.
Signed-off-by: Aaron Kling <webgeek1234@...il.com>
---
arch/arm64/boot/dts/nvidia/tegra186.dtsi | 16 ++++++++++++++++
arch/arm64/boot/dts/nvidia/tegra194.dtsi | 16 ++++++++++++++++
arch/arm64/boot/dts/nvidia/tegra210.dtsi | 13 +++++++++++++
arch/arm64/boot/dts/nvidia/tegra234.dtsi | 16 ++++++++++++++++
4 files changed, 61 insertions(+)
diff --git a/arch/arm64/boot/dts/nvidia/tegra186.dtsi b/arch/arm64/boot/dts/nvidia/tegra186.dtsi
index 2b3bb5d0af17bd521f87db0484fcbe943dd1a797..2e2b27deb957dfd754e42dd03f5a1da5079971dc 100644
--- a/arch/arm64/boot/dts/nvidia/tegra186.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra186.dtsi
@@ -2051,6 +2051,22 @@ pmu-denver {
interrupt-affinity = <&denver_0 &denver_1>;
};
+ reserved-memory {
+ #address-cells = <2>;
+ #size-cells = <2>;
+ ranges;
+
+ ramoops_carveout {
+ compatible = "ramoops";
+ size = <0x0 0x200000>;
+ record-size = <0x00010000>;
+ console-size = <0x00080000>;
+ alignment = <0x0 0x10000>;
+ alloc-ranges = <0x0 0x0 0x1 0x0>;
+ no-map;
+ };
+ };
+
sound {
status = "disabled";
diff --git a/arch/arm64/boot/dts/nvidia/tegra194.dtsi b/arch/arm64/boot/dts/nvidia/tegra194.dtsi
index 33f92b77cd9d9e530eae87a4bb8ba61993ceffeb..90ffea161a57a8986c2493573c73e3cf9e2c43c0 100644
--- a/arch/arm64/boot/dts/nvidia/tegra194.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra194.dtsi
@@ -3105,6 +3105,22 @@ psci {
method = "smc";
};
+ reserved-memory {
+ #address-cells = <2>;
+ #size-cells = <2>;
+ ranges;
+
+ ramoops_carveout {
+ compatible = "ramoops";
+ size = <0x0 0x200000>;
+ record-size = <0x00010000>;
+ console-size = <0x00080000>;
+ alignment = <0x0 0x10000>;
+ alloc-ranges = <0x0 0x0 0x1 0x0>;
+ no-map;
+ };
+ };
+
tcu: serial {
compatible = "nvidia,tegra194-tcu";
mboxes = <&hsp_top0 TEGRA_HSP_MBOX_TYPE_SM TEGRA_HSP_SM_RX(0)>,
diff --git a/arch/arm64/boot/dts/nvidia/tegra210.dtsi b/arch/arm64/boot/dts/nvidia/tegra210.dtsi
index b6c84d195c0ef9ae90721fada09ffd46a9c11fa3..00ae127e8b8af3fe3b95d8ce5986d937a4fc6325 100644
--- a/arch/arm64/boot/dts/nvidia/tegra210.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra210.dtsi
@@ -2025,6 +2025,19 @@ pmu {
&{/cpus/cpu@2} &{/cpus/cpu@3}>;
};
+ reserved-memory {
+ #address-cells = <2>;
+ #size-cells = <2>;
+ ranges;
+
+ ramoops@...00000 {
+ compatible = "ramoops";
+ reg = <0x0 0xb0000000 0x0 0x200000>;
+ record-size = <0x00010000>;
+ console-size = <0x00080000>;
+ };
+ };
+
sound {
status = "disabled";
diff --git a/arch/arm64/boot/dts/nvidia/tegra234.dtsi b/arch/arm64/boot/dts/nvidia/tegra234.dtsi
index 2601b43b2d8cadeb0d1f428018a82b144aa79392..36f35c6dc774d42aca8871dbfa0e0a16414cb860 100644
--- a/arch/arm64/boot/dts/nvidia/tegra234.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra234.dtsi
@@ -5723,6 +5723,22 @@ psci {
method = "smc";
};
+ reserved-memory {
+ #address-cells = <2>;
+ #size-cells = <2>;
+ ranges;
+
+ ramoops_carveout {
+ compatible = "ramoops";
+ size = <0x0 0x200000>;
+ record-size = <0x00010000>;
+ console-size = <0x00080000>;
+ alignment = <0x0 0x10000>;
+ alloc-ranges = <0x0 0x0 0x1 0x0>;
+ no-map;
+ };
+ };
+
tcu: serial {
compatible = "nvidia,tegra234-tcu", "nvidia,tegra194-tcu";
mboxes = <&hsp_top0 TEGRA_HSP_MBOX_TYPE_SM TEGRA_HSP_SM_RX(0)>,
---
base-commit: 91e5bfe317d8f8471fbaa3e70cf66cae1314a516
change-id: 20250404-tegra-pstore-5bed3f721390
Best regards,
--
Aaron Kling <webgeek1234@...il.com>
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