linux-kernel - [PATCH 2/2] arm64: dts: qcom: x1-el2: Add the APSS watchdog

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20251214-arm64-dts-qcom-x1e80100-el2-add-apss-wdt-v1-2-94ee80b8cbe7@oss.qualcomm.com>
Date: Sun, 14 Dec 2025 22:49:59 +0200
From: Abel Vesa <abel.vesa@....qualcomm.com>
To: Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Guenter Roeck <linux@...ck-us.net>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Rajendra Nayak <quic_rjendra@...cinc.com>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>
Cc: linux-arm-msm@...r.kernel.org, linux-watchdog@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Abel Vesa <abel.vesa@....qualcomm.com>
Subject: [PATCH 2/2] arm64: dts: qcom: x1-el2: Add the APSS watchdog

The watchdog support in EL1 is SBSA compliant, handled by Gunyah
hypervisor, but in EL2. the watchdog is an instance of the APSS WDT HW
block, same as older platforms. So describe the APSS WDT node in the EL2
overlay.

Signed-off-by: Abel Vesa <abel.vesa@....qualcomm.com>
---
 arch/arm64/boot/dts/qcom/x1-el2.dtso | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/x1-el2.dtso b/arch/arm64/boot/dts/qcom/x1-el2.dtso
index 2d1c9151cf1b..404174a15659 100644
--- a/arch/arm64/boot/dts/qcom/x1-el2.dtso
+++ b/arch/arm64/boot/dts/qcom/x1-el2.dtso
@@ -7,6 +7,8 @@
 /dts-v1/;
 /plugin/;
 
+#include <dt-bindings/interrupt-controller/arm-gic.h>
+
 /* We can't and don't need to use zap shader in EL2 as linux can zap the gpu on it's own. */
 &gpu_zap_shader {
 	status = "disabled";
@@ -55,3 +57,17 @@ &pcie_smmu {
 &sbsa_watchdog {
 	status = "disabled";
 };
+
+&soc {
+	#address-cells = <2>;
+	#size-cells = <2>;
+
+	/* The APSS watchdog is only accessible in EL2 */
+	watchdog@...10000 {
+		compatible = "qcom,apss-wdt-x1e80100", "qcom,kpss-wdt";
+		reg = <0x0 0x17410000 0x0 0x1000>;
+		clocks = <&sleep_clk>;
+		interrupts = <GIC_SPI 0 IRQ_TYPE_EDGE_RISING>;
+		interrupt-parent = <&intc>;
+	};
+};

-- 
2.48.1