The VCPU stall detection mechanism allows to configure the expiration duration and the internal counter clock frequency measured in Hz. Add these properties in the schema. While this is a memory mapped virtual device, it is expected to be loaded when the DT contains the compatible: "qemu,vcpu-stall-detector" node. In a protected VM we trust the generated DT nodes and we don't rely on the host to present the hardware peripherals. Signed-off-by: Sebastian Ene <sebastianene@xxxxxxxxxx> --- .../bindings/misc/vcpu_stall_detector.yaml | 47 +++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 Documentation/devicetree/bindings/misc/vcpu_stall_detector.yaml diff --git a/Documentation/devicetree/bindings/misc/vcpu_stall_detector.yaml b/Documentation/devicetree/bindings/misc/vcpu_stall_detector.yaml new file mode 100644 index 000000000000..2496fd84faa0 --- /dev/null +++ b/Documentation/devicetree/bindings/misc/vcpu_stall_detector.yaml @@ -0,0 +1,47 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/misc/vcpu_stall_detector.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: VCPU stall detector + +description: | + This binding describes a CPU stall detector mechanism for virtual cpus + which is accessed through MMIO. + +maintainers: + - Sebastian Ene <sebastianene@xxxxxxxxxx> + +properties: + compatible: + enum: + - qemu,vcpu-stall-detector + clock-frequency: + $ref: /schemas/types.yaml#/definitions/uint32 + description: | + The internal clock of the stall detector peripheral measure in Hz used + to decrement its internal counter register on each tick. + Defaults to 10 if unset. + timeout-sec: + $ref: /schemas/types.yaml#/definitions/uint32 + description: | + The stall detector expiration timeout measured in seconds. + Defaults to 8 if unset. Please note that it also takes into account the + time spent while the VCPU is not running. + +required: + - compatible + +additionalProperties: false + +examples: + - | + vmwdt@9030000 { + compatible = "qemu,vcpu-stall-detector"; + clock-frequency = <10>; + timeout-sec = <8>; + reg = <0x0 0x9030000 0x0 0x10000>; + }; + +... -- 2.36.0.512.ge40c2bad7a-goog
