From: Sebastian Ene <sebastianene@google.com>
To: Rob Herring <robh+dt@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Arnd Bergmann <arnd@arndb.de>,
Dragan Cvetic <dragan.cvetic@xilinx.com>
Cc: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org,
maz@kernel.org, will@kernel.org, qperret@google.com,
Guenter Roeck <linux@roeck-us.net>,
Sebastian Ene <sebastianene@google.com>
Subject: [PATCH v4 1/2] dt-bindings: vm-wdt: Add qemu,vm-watchdog compatible
Date: Fri, 29 Apr 2022 08:30:31 +0000 [thread overview]
Message-ID: <20220429083030.3241640-2-sebastianene@google.com> (raw)
In-Reply-To: <20220429083030.3241640-1-sebastianene@google.com>
The stall detection mechanism allows to configure the expiration
duration and the internal counter clock frequency measured in Hz.
Add these properties in the schema.
Signed-off-by: Sebastian Ene <sebastianene@google.com>
---
.../devicetree/bindings/misc/vm-watchdog.yaml | 45 +++++++++++++++++++
1 file changed, 45 insertions(+)
create mode 100644 Documentation/devicetree/bindings/misc/vm-watchdog.yaml
diff --git a/Documentation/devicetree/bindings/misc/vm-watchdog.yaml b/Documentation/devicetree/bindings/misc/vm-watchdog.yaml
new file mode 100644
index 000000000000..d7cca23357ab
--- /dev/null
+++ b/Documentation/devicetree/bindings/misc/vm-watchdog.yaml
@@ -0,0 +1,45 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/misc/vm-watchdog.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: VM watchdog
+
+description: |
+ This binding describes a CPU stall detector mechanism for virtual cpus
+ which is accessed through MMIO.
+
+maintainers:
+ - Sebastian Ene <sebastianene@google.com>
+
+properties:
+ compatible:
+ enum:
+ - qemu,vm-watchdog
+ clock-frequency:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: |
+ The watchdog internal clock measure in Hz used to decrement the
+ watchdog counter register on each tick.
+ Defaults to 10 if unset.
+ timeout-sec:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: |
+ The watchdog expiration timeout measured in seconds.
+ Defaults to 8 if unset.
+
+required:
+ - compatible
+
+additionalProperties: false
+
+examples:
+ - |
+ watchdog {
+ compatible = "qemu,vm-watchdog";
+ clock-frequency = <10>;
+ timeout-sec = <8>;
+ };
+
+...
--
2.36.0.464.gb9c8b46e94-goog
next prev parent reply other threads:[~2022-04-29 8:31 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-29 8:30 [PATCH v4 0/2] Detect stalls on guest vCPUS Sebastian Ene
2022-04-29 8:30 ` Sebastian Ene [this message]
2022-04-29 15:53 ` [PATCH v4 1/2] dt-bindings: vm-wdt: Add qemu,vm-watchdog compatible Rob Herring
2022-05-07 8:16 ` Sebastian Ene
2022-04-29 8:30 ` [PATCH v4 2/2] misc: Add a mechanism to detect stalls on guest vCPUs Sebastian Ene
2022-04-29 8:48 ` Greg Kroah-Hartman
2022-04-29 16:51 ` Guenter Roeck
2022-04-30 6:18 ` Greg Kroah-Hartman
2022-04-30 12:36 ` Guenter Roeck
2022-05-02 5:58 ` Sebastian Ene
2022-04-29 8:51 ` Greg Kroah-Hartman
2022-04-29 9:26 ` Sebastian Ene
2022-04-29 9:38 ` Greg Kroah-Hartman
2022-04-29 21:03 ` Rob Herring
2022-05-04 7:29 ` Sebastian Ene
2022-04-29 17:02 ` Guenter Roeck
2022-04-29 20:25 ` [PATCH v4 0/2] Detect stalls on guest vCPUS Rob Herring
2022-05-02 6:03 ` Sebastian Ene
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