1 /* 2 * Copyright (c) 2022, Arm Limited. All rights reserved. 3 * Copyright (c) 2022, Linaro. 4 * 5 * SPDX-License-Identifier: BSD-3-Clause 6 */ 7 8 #include <string.h> 9 10 #include "./include/imx8m_measured_boot.h" 11 #include <drivers/measured_boot/event_log/event_log.h> 12 #include <plat/arm/common/plat_arm.h> 13 14 /* Event Log data */ 15 static uint8_t event_log[PLAT_IMX_EVENT_LOG_MAX_SIZE]; 16 17 /* FVP table with platform specific image IDs, names and PCRs */ 18 static const event_log_metadata_t imx8m_event_log_metadata[] = { 19 { BL31_IMAGE_ID, EVLOG_BL31_STRING, PCR_0 }, 20 { BL32_IMAGE_ID, EVLOG_BL32_STRING, PCR_0 }, 21 { BL32_EXTRA1_IMAGE_ID, EVLOG_BL32_EXTRA1_STRING, PCR_0 }, 22 { BL32_EXTRA2_IMAGE_ID, EVLOG_BL32_EXTRA2_STRING, PCR_0 }, 23 { BL33_IMAGE_ID, EVLOG_BL33_STRING, PCR_0 }, 24 { EVLOG_INVALID_ID, NULL, (unsigned int)(-1) } /* Terminator */ 25 }; 26 27 const event_log_metadata_t *plat_event_log_get_metadata(void) 28 { 29 return imx8m_event_log_metadata; 30 } 31 32 int plat_mboot_measure_image(unsigned int image_id, image_info_t *image_data) 33 { 34 /* Calculate image hash and record data in Event Log */ 35 int err = event_log_measure_and_record(image_data->image_base, 36 image_data->image_size, 37 image_id); 38 if (err != 0) { 39 ERROR("%s%s image id %u (%i)\n", 40 "Failed to ", "record", image_id, err); 41 return err; 42 } 43 44 return 0; 45 } 46 47 void bl2_plat_mboot_init(void) 48 { 49 event_log_init(event_log, event_log + sizeof(event_log)); 50 event_log_write_header(); 51 } 52 53 void bl2_plat_mboot_finish(void) 54 { 55 int rc = 0; 56 57 /* Event Log address in Non-Secure memory */ 58 uintptr_t ns_log_addr; 59 60 /* Event Log filled size */ 61 size_t event_log_cur_size; 62 63 event_log_cur_size = event_log_get_cur_size(event_log); 64 65 rc = imx8m_set_nt_fw_info(event_log_cur_size, &ns_log_addr); 66 if (rc != 0) { 67 ERROR("%s(): Unable to update %s_FW_CONFIG\n", 68 __func__, "NT"); 69 /* 70 * It is a fatal error because on i.MX U-boot assumes that 71 * a valid event log exists and will use it to record the 72 * measurements into the fTPM. 73 */ 74 panic(); 75 } 76 77 /* Copy Event Log to Non-secure memory */ 78 (void)memcpy((void *)ns_log_addr, (const void *)event_log, 79 event_log_cur_size); 80 81 /* Ensure that the Event Log is visible in Non-secure memory */ 82 flush_dcache_range(ns_log_addr, event_log_cur_size); 83 84 dump_event_log((uint8_t *)event_log, event_log_cur_size); 85 } 86