7bc3c7e99c
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. Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Sebastian Ene <sebastianene@google.com> Link: https://lore.kernel.org/r/20220711081720.2870509-2-sebastianene@google.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> (cherry picked from commit 952ae488b9492b40ea18b5de101afce69b965336) Change-Id: I495de803e7c8443e378273d1f52365a00b8fc6f2
52 lines
1.2 KiB
YAML
52 lines
1.2 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/misc/qemu,vcpu-stall-detector.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: VCPU stall detector
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description:
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This binding describes a CPU stall detector mechanism for virtual CPUs
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which is accessed through MMIO.
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maintainers:
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- Sebastian Ene <sebastianene@google.com>
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properties:
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compatible:
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enum:
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- qemu,vcpu-stall-detector
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reg:
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maxItems: 1
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clock-frequency:
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$ref: /schemas/types.yaml#/definitions/uint32
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description: |
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The internal clock of the stall detector peripheral measure in Hz used
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to decrement its internal counter register on each tick.
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Defaults to 10 if unset.
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default: 10
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timeout-sec:
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description: |
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The stall detector expiration timeout measured in seconds.
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Defaults to 8 if unset. Please note that it also takes into account the
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time spent while the VCPU is not running.
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default: 8
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required:
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- compatible
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additionalProperties: false
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examples:
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- |
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vmwdt@9030000 {
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compatible = "qemu,vcpu-stall-detector";
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reg = <0x9030000 0x10000>;
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clock-frequency = <10>;
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timeout-sec = <8>;
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};
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