1 /* 2 * Copyright (c) 2021, Arm Limited. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <stdint.h> 8 9 #include <drivers/measured_boot/event_log/event_log.h> 10 #include <plat/arm/common/plat_arm.h> 11 12 /* Event Log data */ 13 static uint64_t event_log_base; 14 15 /* FVP table with platform specific image IDs, names and PCRs */ 16 const event_log_metadata_t fvp_event_log_metadata[] = { 17 { BL31_IMAGE_ID, EVLOG_BL31_STRING, PCR_0 }, 18 { BL32_IMAGE_ID, EVLOG_BL32_STRING, PCR_0 }, 19 { BL32_EXTRA1_IMAGE_ID, EVLOG_BL32_EXTRA1_STRING, PCR_0 }, 20 { BL32_EXTRA2_IMAGE_ID, EVLOG_BL32_EXTRA2_STRING, PCR_0 }, 21 { BL33_IMAGE_ID, EVLOG_BL33_STRING, PCR_0 }, 22 { HW_CONFIG_ID, EVLOG_HW_CONFIG_STRING, PCR_0 }, 23 { NT_FW_CONFIG_ID, EVLOG_NT_FW_CONFIG_STRING, PCR_0 }, 24 { SCP_BL2_IMAGE_ID, EVLOG_SCP_BL2_STRING, PCR_0 }, 25 { SOC_FW_CONFIG_ID, EVLOG_SOC_FW_CONFIG_STRING, PCR_0 }, 26 { TOS_FW_CONFIG_ID, EVLOG_TOS_FW_CONFIG_STRING, PCR_0 }, 27 { INVALID_ID, NULL, (unsigned int)(-1) } /* Terminator */ 28 }; 29 30 void bl2_plat_mboot_init(void) 31 { 32 uint8_t *event_log_start; 33 uint8_t *event_log_finish; 34 size_t bl1_event_log_size; 35 int rc; 36 37 rc = arm_get_tb_fw_info(&event_log_base, &bl1_event_log_size); 38 if (rc != 0) { 39 ERROR("%s(): Unable to get Event Log info from TB_FW_CONFIG\n", 40 __func__); 41 /* 42 * It is a fatal error because on FVP platform, BL2 software 43 * assumes that a valid Event Log buffer exist and it will use 44 * same Event Log buffer to append image measurements. 45 */ 46 panic(); 47 } 48 49 /* 50 * BL1 and BL2 share the same Event Log buffer and that BL2 will 51 * append its measurements after BL1's 52 */ 53 event_log_start = (uint8_t *)((uintptr_t)event_log_base + 54 bl1_event_log_size); 55 event_log_finish = (uint8_t *)((uintptr_t)event_log_base + 56 PLAT_ARM_EVENT_LOG_MAX_SIZE); 57 58 event_log_init((uint8_t *)event_log_start, event_log_finish); 59 } 60 61 void bl2_plat_mboot_finish(void) 62 { 63 int rc; 64 65 /* Event Log address in Non-Secure memory */ 66 uintptr_t ns_log_addr; 67 68 /* Event Log filled size */ 69 size_t event_log_cur_size; 70 71 event_log_cur_size = event_log_get_cur_size((uint8_t *)event_log_base); 72 73 rc = arm_set_nt_fw_info( 74 #ifdef SPD_opteed 75 (uintptr_t)event_log_base, 76 #endif 77 event_log_cur_size, &ns_log_addr); 78 if (rc != 0) { 79 ERROR("%s(): Unable to update %s_FW_CONFIG\n", 80 __func__, "NT"); 81 /* 82 * It is a fatal error because on FVP secure world software 83 * assumes that a valid event log exists and will use it to 84 * record the measurements into the fTPM. 85 * Note: In FVP platform, OP-TEE uses nt_fw_config to get the 86 * secure Event Log buffer address. 87 */ 88 panic(); 89 } 90 91 /* Copy Event Log to Non-secure memory */ 92 (void)memcpy((void *)ns_log_addr, (const void *)event_log_base, 93 event_log_cur_size); 94 95 /* Ensure that the Event Log is visible in Non-secure memory */ 96 flush_dcache_range(ns_log_addr, event_log_cur_size); 97 98 #if defined(SPD_tspd) || defined(SPD_spmd) 99 /* Set Event Log data in TOS_FW_CONFIG */ 100 rc = arm_set_tos_fw_info((uintptr_t)event_log_base, 101 event_log_cur_size); 102 if (rc != 0) { 103 ERROR("%s(): Unable to update %s_FW_CONFIG\n", 104 __func__, "TOS"); 105 panic(); 106 } 107 #endif /* defined(SPD_tspd) || defined(SPD_spmd) */ 108 109 dump_event_log((uint8_t *)event_log_base, event_log_cur_size); 110 } 111