1 /* 2 * Copyright (c) 2021-2022, Arm Limited. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <stdint.h> 8 9 #include <common/tbbr/tbbr_img_def.h> 10 #include <drivers/measured_boot/event_log/event_log.h> 11 #include <drivers/measured_boot/rss/rss_measured_boot.h> 12 #include <tools_share/tbbr_oid.h> 13 #include <fvp_critical_data.h> 14 15 #include <plat/arm/common/plat_arm.h> 16 #include <plat/common/common_def.h> 17 18 /* Event Log data */ 19 static uint64_t event_log_base; 20 21 /* FVP table with platform specific image IDs, names and PCRs */ 22 const event_log_metadata_t fvp_event_log_metadata[] = { 23 { BL31_IMAGE_ID, EVLOG_BL31_STRING, PCR_0 }, 24 { BL32_IMAGE_ID, EVLOG_BL32_STRING, PCR_0 }, 25 { BL32_EXTRA1_IMAGE_ID, EVLOG_BL32_EXTRA1_STRING, PCR_0 }, 26 { BL32_EXTRA2_IMAGE_ID, EVLOG_BL32_EXTRA2_STRING, PCR_0 }, 27 { BL33_IMAGE_ID, EVLOG_BL33_STRING, PCR_0 }, 28 { HW_CONFIG_ID, EVLOG_HW_CONFIG_STRING, PCR_0 }, 29 { NT_FW_CONFIG_ID, EVLOG_NT_FW_CONFIG_STRING, PCR_0 }, 30 { SCP_BL2_IMAGE_ID, EVLOG_SCP_BL2_STRING, PCR_0 }, 31 { SOC_FW_CONFIG_ID, EVLOG_SOC_FW_CONFIG_STRING, PCR_0 }, 32 { TOS_FW_CONFIG_ID, EVLOG_TOS_FW_CONFIG_STRING, PCR_0 }, 33 { RMM_IMAGE_ID, EVLOG_RMM_STRING, PCR_0}, 34 35 #if defined(SPD_spmd) 36 { SP_PKG1_ID, EVLOG_SP1_STRING, PCR_0 }, 37 { SP_PKG2_ID, EVLOG_SP2_STRING, PCR_0 }, 38 { SP_PKG3_ID, EVLOG_SP3_STRING, PCR_0 }, 39 { SP_PKG4_ID, EVLOG_SP4_STRING, PCR_0 }, 40 { SP_PKG5_ID, EVLOG_SP5_STRING, PCR_0 }, 41 { SP_PKG6_ID, EVLOG_SP6_STRING, PCR_0 }, 42 { SP_PKG7_ID, EVLOG_SP7_STRING, PCR_0 }, 43 { SP_PKG8_ID, EVLOG_SP8_STRING, PCR_0 }, 44 #endif 45 46 { CRITICAL_DATA_ID, EVLOG_CRITICAL_DATA_STRING, PCR_1 }, 47 48 { EVLOG_INVALID_ID, NULL, (unsigned int)(-1) } /* Terminator */ 49 }; 50 51 /* FVP table with platform specific image IDs and metadata. Intentionally not a 52 * const struct, some members might set by bootloaders during trusted boot. 53 */ 54 struct rss_mboot_metadata fvp_rss_mboot_metadata[] = { 55 { 56 .id = BL31_IMAGE_ID, 57 .slot = U(9), 58 .signer_id_size = SIGNER_ID_MIN_SIZE, 59 .sw_type = RSS_MBOOT_BL31_STRING, 60 .lock_measurement = true }, 61 { 62 .id = HW_CONFIG_ID, 63 .slot = U(10), 64 .signer_id_size = SIGNER_ID_MIN_SIZE, 65 .sw_type = RSS_MBOOT_HW_CONFIG_STRING, 66 .lock_measurement = true }, 67 { 68 .id = SOC_FW_CONFIG_ID, 69 .slot = U(11), 70 .signer_id_size = SIGNER_ID_MIN_SIZE, 71 .sw_type = RSS_MBOOT_SOC_FW_CONFIG_STRING, 72 .lock_measurement = true }, 73 { 74 .id = RMM_IMAGE_ID, 75 .slot = U(12), 76 .signer_id_size = SIGNER_ID_MIN_SIZE, 77 .sw_type = RSS_MBOOT_RMM_STRING, 78 .lock_measurement = true }, 79 { 80 .id = RSS_MBOOT_INVALID_ID } 81 }; 82 83 void bl2_plat_mboot_init(void) 84 { 85 uint8_t *event_log_start; 86 uint8_t *event_log_finish; 87 size_t bl1_event_log_size; 88 int rc; 89 90 rc = arm_get_tb_fw_info(&event_log_base, &bl1_event_log_size); 91 if (rc != 0) { 92 ERROR("%s(): Unable to get Event Log info from TB_FW_CONFIG\n", 93 __func__); 94 /* 95 * It is a fatal error because on FVP platform, BL2 software 96 * assumes that a valid Event Log buffer exist and it will use 97 * same Event Log buffer to append image measurements. 98 */ 99 panic(); 100 } 101 102 /* 103 * BL1 and BL2 share the same Event Log buffer and that BL2 will 104 * append its measurements after BL1's 105 */ 106 event_log_start = (uint8_t *)((uintptr_t)event_log_base + 107 bl1_event_log_size); 108 event_log_finish = (uint8_t *)((uintptr_t)event_log_base + 109 PLAT_ARM_EVENT_LOG_MAX_SIZE); 110 111 event_log_init((uint8_t *)event_log_start, event_log_finish); 112 113 rss_measured_boot_init(); 114 } 115 116 int plat_mboot_measure_critical_data(unsigned int critical_data_id, 117 const void *base, size_t size) 118 { 119 /* 120 * It is very unlikely that the critical data size would be 121 * bigger than 2^32 bytes 122 */ 123 assert(size < UINT32_MAX); 124 assert(base != NULL); 125 126 /* Calculate image hash and record data in Event Log */ 127 int err = event_log_measure_and_record((uintptr_t)base, (uint32_t)size, 128 critical_data_id); 129 if (err != 0) { 130 ERROR("%s%s critical data (%i)\n", 131 "Failed to ", "record", err); 132 return err; 133 } 134 135 return 0; 136 } 137 138 #if TRUSTED_BOARD_BOOT 139 static int fvp_populate_critical_data(struct fvp_critical_data *critical_data) 140 { 141 char *nv_ctr_oids[MAX_NV_CTR_IDS] = { 142 [TRUSTED_NV_CTR_ID] = TRUSTED_FW_NVCOUNTER_OID, 143 [NON_TRUSTED_NV_CTR_ID] = NON_TRUSTED_FW_NVCOUNTER_OID, 144 }; 145 146 for (int i = 0; i < MAX_NV_CTR_IDS; i++) { 147 int rc = plat_get_nv_ctr(nv_ctr_oids[i], 148 &critical_data->nv_ctr[i]); 149 if (rc != 0) { 150 return rc; 151 } 152 } 153 154 return 0; 155 } 156 #endif /* TRUSTED_BOARD_BOOT */ 157 158 static int fvp_populate_and_measure_critical_data(void) 159 { 160 int rc = 0; 161 162 /* 163 * FVP platform only measures 'platform NV-counter' and hence its 164 * measurement makes sense during Trusted-Boot flow only. 165 */ 166 #if TRUSTED_BOARD_BOOT 167 struct fvp_critical_data populate_critical_data; 168 169 rc = fvp_populate_critical_data(&populate_critical_data); 170 if (rc == 0) { 171 rc = plat_mboot_measure_critical_data(CRITICAL_DATA_ID, 172 &populate_critical_data, 173 sizeof(populate_critical_data)); 174 } 175 #endif /* TRUSTED_BOARD_BOOT */ 176 177 return rc; 178 } 179 180 void bl2_plat_mboot_finish(void) 181 { 182 int rc; 183 184 /* Event Log address in Non-Secure memory */ 185 uintptr_t ns_log_addr; 186 187 /* Event Log filled size */ 188 size_t event_log_cur_size; 189 190 rc = fvp_populate_and_measure_critical_data(); 191 if (rc != 0) { 192 panic(); 193 } 194 195 event_log_cur_size = event_log_get_cur_size((uint8_t *)event_log_base); 196 197 rc = arm_set_nt_fw_info( 198 #ifdef SPD_opteed 199 (uintptr_t)event_log_base, 200 #endif 201 event_log_cur_size, &ns_log_addr); 202 if (rc != 0) { 203 ERROR("%s(): Unable to update %s_FW_CONFIG\n", 204 __func__, "NT"); 205 /* 206 * It is a fatal error because on FVP secure world software 207 * assumes that a valid event log exists and will use it to 208 * record the measurements into the fTPM. 209 * Note: In FVP platform, OP-TEE uses nt_fw_config to get the 210 * secure Event Log buffer address. 211 */ 212 panic(); 213 } 214 215 /* Copy Event Log to Non-secure memory */ 216 (void)memcpy((void *)ns_log_addr, (const void *)event_log_base, 217 event_log_cur_size); 218 219 /* Ensure that the Event Log is visible in Non-secure memory */ 220 flush_dcache_range(ns_log_addr, event_log_cur_size); 221 222 #if defined(SPD_tspd) || defined(SPD_spmd) 223 /* Set Event Log data in TOS_FW_CONFIG */ 224 rc = arm_set_tos_fw_info((uintptr_t)event_log_base, 225 event_log_cur_size); 226 if (rc != 0) { 227 ERROR("%s(): Unable to update %s_FW_CONFIG\n", 228 __func__, "TOS"); 229 panic(); 230 } 231 #endif /* defined(SPD_tspd) || defined(SPD_spmd) */ 232 233 dump_event_log((uint8_t *)event_log_base, event_log_cur_size); 234 } 235