2020-07-13 14:59:02 +01:00
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DTB binding for Event Log properties
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====================================
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This document describes the device tree format of Event Log properties.
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These properties are not related to a specific platform and can be queried
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from common code.
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Dynamic configuration for Event Log
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Measured Boot driver expects a *tpm_event_log* node with the following field
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2021-08-11 10:45:03 +01:00
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in 'tb_fw_config', 'nt_fw_config' and 'tsp_fw_config' DTS files:
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2020-07-13 14:59:02 +01:00
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- compatible [mandatory]
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- value type: <string>
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- Must be the string "arm,tpm_event_log".
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Then a list of properties representing Event Log configuration, which
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can be used by Measured Boot driver. Each property is named according
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to the information it contains:
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- tpm_event_log_sm_addr [fvp_nt_fw_config.dts with OP-TEE]
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- value type: <u64>
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- Event Log base address in secure memory.
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Note. Currently OP-TEE does not support reading DTBs from Secure memory
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and this property should be removed when this feature is supported.
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- tpm_event_log_addr [mandatory]
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- value type: <u64>
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- Event Log base address in non-secure memory.
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- tpm_event_log_size [mandatory]
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- value type: <u32>
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- Event Log size.
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