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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/tpm/ibm,vtpm.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: IBM Virtual Trusted Platform Module (vTPM)
maintainers:
- Nayna Jain <nayna@linux.ibm.com>
description: |
Virtual TPM is used on IBM POWER7+ and POWER8 systems running POWERVM.
It is supported through the adjunct partition with firmware release 740
or higher. With vTPM support, each lpar is able to have its own vTPM
without the physical TPM hardware. The TPM functionality is provided by
communicating with the vTPM adjunct partition through Hypervisor calls
(Hcalls) and Command/Response Queue (CRQ) commands.
properties:
compatible:
enum:
- IBM,vtpm
- IBM,vtpm20
device_type:
description:
type of virtual device
enum:
- IBM,vtpm
- IBM,vtpm20
reg:
maxItems: 1
'ibm,#dma-address-cells':
description:
number of cells that are used to encode the physical address field of
dma-window properties
$ref: /schemas/types.yaml#/definitions/uint32-array
'ibm,#dma-size-cells':
description:
number of cells that are used to encode the size field of
dma-window properties
$ref: /schemas/types.yaml#/definitions/uint32-array
ibm,my-dma-window:
description:
DMA window associated with this virtual I/O Adapter
$ref: /schemas/types.yaml#/definitions/uint32-array
minItems: 5
maxItems: 5
ibm,my-drc-index:
description:
integer index for the connector between the device and its parent;
present only if Dynamic Reconfiguration (DR) Connector is enabled
$ref: /schemas/types.yaml#/definitions/uint32
ibm,loc-code:
description:
unique and persistent location code associated with this virtual
I/O Adapter
$ref: /schemas/types.yaml#/definitions/string
required:
- compatible
- device_type
- reg
- interrupts
- ibm,#dma-address-cells
- ibm,#dma-size-cells
- ibm,my-dma-window
- ibm,my-drc-index
- ibm,loc-code
- linux,sml-base
- linux,sml-size
allOf:
- $ref: tpm-common.yaml#
unevaluatedProperties: false
examples:
- |
soc {
#address-cells = <1>;
#size-cells = <0>;
tpm@30000003 {
compatible = "IBM,vtpm";
device_type = "IBM,vtpm";
reg = <0x30000003>;
interrupts = <0xa0003 0x0>;
ibm,#dma-address-cells = <0x2>;
ibm,#dma-size-cells = <0x2>;
ibm,my-dma-window = <0x10000003 0x0 0x0 0x0 0x10000000>;
ibm,my-drc-index = <0x30000003>;
ibm,loc-code = "U8286.41A.10082DV-V3-C3";
linux,sml-base = <0xc60e 0x0>;
linux,sml-size = <0xbce10200>;
};
};
|
