| Alexei Fedorov | 61369a2 | 2020-07-13 14:59:02 +0100 | [diff] [blame] | 1 | DTB binding for Event Log properties |
| 2 | ==================================== |
| 3 | |
| 4 | This document describes the device tree format of Event Log properties. |
| 5 | These properties are not related to a specific platform and can be queried |
| 6 | from common code. |
| 7 | |
| 8 | Dynamic configuration for Event Log |
| 9 | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 10 | |
| 11 | Measured Boot driver expects a *tpm_event_log* node with the following field |
| Manish V Badarkhe | 3a17096 | 2021-08-11 10:45:03 +0100 | [diff] [blame^] | 12 | in 'tb_fw_config', 'nt_fw_config' and 'tsp_fw_config' DTS files: |
| Alexei Fedorov | 61369a2 | 2020-07-13 14:59:02 +0100 | [diff] [blame] | 13 | |
| 14 | - compatible [mandatory] |
| 15 | - value type: <string> |
| 16 | - Must be the string "arm,tpm_event_log". |
| 17 | |
| 18 | Then a list of properties representing Event Log configuration, which |
| 19 | can be used by Measured Boot driver. Each property is named according |
| 20 | to the information it contains: |
| 21 | |
| 22 | - tpm_event_log_sm_addr [fvp_nt_fw_config.dts with OP-TEE] |
| 23 | - value type: <u64> |
| 24 | - Event Log base address in secure memory. |
| 25 | |
| 26 | Note. Currently OP-TEE does not support reading DTBs from Secure memory |
| 27 | and this property should be removed when this feature is supported. |
| 28 | |
| 29 | - tpm_event_log_addr [mandatory] |
| 30 | - value type: <u64> |
| 31 | - Event Log base address in non-secure memory. |
| 32 | |
| 33 | - tpm_event_log_size [mandatory] |
| 34 | - value type: <u32> |
| 35 | - Event Log size. |