1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 2%YAML 1.2 3--- 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 to 15 offer trusted computing features in their CPUs aimed at displacing dedicated 16 trusted hardware. Unfortunately, these CPU architectures raise serious 17 challenges to building trusted systems because they omit providing secure 18 resources outside the CPU perimeter. 19 20 Microsoft's firmware-based TPM 2.0 (fTPM) leverages ARM TrustZone to overcome 21 these challenges and provide software with security guarantees similar to 22 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-FirmwareTPM 26 27properties: 28 compatible: 29 const: microsoft,ftpm 30 31required: 32 - compatible 33 - linux,sml-base 34 - linux,sml-size 35 36allOf: 37 - $ref: tpm-common.yaml# 38 39unevaluatedProperties: false 40 41examples: 42 - | 43 tpm { 44 compatible = "microsoft,ftpm"; 45 linux,sml-base = <0x0 0xc0000000>; 46 linux,sml-size = <0x10000>; 47 }; 48