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1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)2%YAML 1.23---4$id: http://devicetree.org/schemas/tpm/microsoft,ftpm.yaml#5$schema: http://devicetree.org/meta-schemas/core.yaml#6 7title: Microsoft firmware-based Trusted Platform Module (fTPM)8 9maintainers:10 - Thirupathaiah Annapureddy <thiruan@microsoft.com>11 - Sasha Levin <sashal@kernel.org>12 13description: |14 Commodity CPU architectures, such as ARM and Intel CPUs, have started to15 offer trusted computing features in their CPUs aimed at displacing dedicated16 trusted hardware. Unfortunately, these CPU architectures raise serious17 challenges to building trusted systems because they omit providing secure18 resources outside the CPU perimeter.19 20 Microsoft's firmware-based TPM 2.0 (fTPM) leverages ARM TrustZone to overcome21 these challenges and provide software with security guarantees similar to22 those of dedicated trusted hardware.23 24 https://www.microsoft.com/en-us/research/publication/ftpm-software-implementation-tpm-chip/25 https://github.com/Microsoft/ms-tpm-20-ref/tree/main/Samples/ARM32-FirmwareTPM26 27properties:28 compatible:29 const: microsoft,ftpm30 31required:32 - compatible33 - linux,sml-base34 - linux,sml-size35 36allOf:37 - $ref: tpm-common.yaml#38 39unevaluatedProperties: false40 41examples:42 - |43 tpm {44 compatible = "microsoft,ftpm";45 linux,sml-base = <0x0 0xc0000000>;46 linux,sml-size = <0x10000>;47 };48