summaryrefslogtreecommitdiff
path: root/Documentation/devicetree/bindings/misc/qemu,vcpu-stall-detector.yaml
blob: 1aebeb696ee0d68ea8bcf3cbd2039fcd2637801b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/misc/qemu,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@google.com>

properties:
  compatible:
    enum:
      - qemu,vcpu-stall-detector

  reg:
    maxItems: 1

  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.
    default: 10

  timeout-sec:
    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.
    default: 8

required:
  - compatible

additionalProperties: false

examples:
  - |
    vmwdt@9030000 {
      compatible = "qemu,vcpu-stall-detector";
      reg = <0x9030000 0x10000>;
      clock-frequency = <10>;
      timeout-sec = <8>;
    };