1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/misc/qemu,vcpu-stall-detector.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: VCPU stall detector
8
9 description:
10 This binding describes a CPU stall detector mechanism for virtual CPUs
11 which is accessed through MMIO.
12
13 maintainers:
14 - Sebastian Ene <sebastianene@google.com>
15
16 properties:
17 compatible:
18 enum:
19 - qemu,vcpu-stall-detector
20
21 reg:
22 maxItems: 1
23
24 clock-frequency:
25 $ref: /schemas/types.yaml#/definitions/uint32
26 description: |
27 The internal clock of the stall detector peripheral measure in Hz used
28 to decrement its internal counter register on each tick.
29 Defaults to 10 if unset.
30 default: 10
31
32 interrupts:
33 maxItems: 1
34
35 timeout-sec:
36 description: |
37 The stall detector expiration timeout measured in seconds.
38 Defaults to 8 if unset. Please note that it also takes into account the
39 time spent while the VCPU is not running.
40 default: 8
41
42 required:
43 - compatible
44
45 additionalProperties: false
46
47 examples:
48 - |
49 #include <dt-bindings/interrupt-controller/arm-gic.h>
50
51 vmwdt@9030000 {
52 compatible = "qemu,vcpu-stall-detector";
53 reg = <0x9030000 0x10000>;
54 clock-frequency = <10>;
55 timeout-sec = <8>;
56 interrupts = <GIC_PPI 15 IRQ_TYPE_EDGE_RISING>;
57 };
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