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https://github.com/ARM-software/arm-trusted-firmware.git
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feat(qemu): add support for measured boot
Add helper functions to generate event log for qemu when MEASURED_BOOT=1. Signed-off-by: Ruchika Gupta <ruchika.gupta@linaro.org> Change-Id: I17a098cb614a3a89fe0fe9577bed6edda8bfd070
This commit is contained in:
Ruchika Gupta
Manish Pandey
parent
861250c3b2
commit
5e690269d5
9 changed files with 441 additions and 15 deletions
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@ -1,6 +1,6 @@
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/*
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* Copyright (c) 2015-2020, ARM Limited and Contributors. All rights reserved.
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* Copyright (c) 2015-2022, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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@ -11,6 +11,7 @@
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#include <common/bl_common.h>
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#include <lib/xlat_tables/xlat_tables_v2.h>
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#include <plat/common/platform.h>
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#include "qemu_private.h"
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#define MAP_DEVICE0 MAP_REGION_FLAT(DEVICE0_BASE, \
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@ -160,4 +161,9 @@ DEFINE_CONFIGURE_MMU_EL(el3)
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DEFINE_CONFIGURE_MMU_EL(svc_mon)
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#endif
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#if MEASURED_BOOT || TRUSTED_BOARD_BOOT
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int plat_get_mbedtls_heap(void **heap_addr, size_t *heap_size)
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{
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return get_mbedtls_heap_helper(heap_addr, heap_size);
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}
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#endif
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@ -1,5 +1,5 @@
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/*
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* Copyright (c) 2015-2019, ARM Limited and Contributors. All rights reserved.
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* Copyright (c) 2015-2022, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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@ -34,4 +34,18 @@ void plat_qemu_gic_init(void);
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void qemu_pwr_gic_on_finish(void);
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void qemu_pwr_gic_off(void);
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int qemu_set_tos_fw_info(uintptr_t config_base, uintptr_t log_addr,
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size_t log_size);
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int qemu_set_nt_fw_info(
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/*
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* Currently OP-TEE does not support reading DTBs from Secure memory
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* and this option should be removed when feature is supported.
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*/
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#ifdef SPD_opteed
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uintptr_t log_addr,
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#endif
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size_t log_size,
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uintptr_t *ns_log_addr);
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#endif /* QEMU_PRIVATE_H */
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@ -1,5 +1,5 @@
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/*
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* Copyright (c) 2017-2019, ARM Limited and Contributors. All rights reserved.
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* Copyright (c) 2017-2022, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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@ -29,8 +29,3 @@ int plat_set_nv_ctr(void *cookie, unsigned int nv_ctr)
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{
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return 1;
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}
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int plat_get_mbedtls_heap(void **heap_addr, size_t *heap_size)
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{
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return get_mbedtls_heap_helper(heap_addr, heap_size);
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}
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@ -1,5 +1,5 @@
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/*
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* Copyright (c) 2015-2019, ARM Limited and Contributors. All rights reserved.
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* Copyright (c) 2015-2022, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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@ -270,4 +270,9 @@
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*/
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#define SYS_COUNTER_FREQ_IN_TICKS ((1000 * 1000 * 1000) / 16)
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/*
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* Maximum size of Event Log buffer used in Measured Boot Event Log driver
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*/
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#define PLAT_EVENT_LOG_MAX_SIZE UL(0x400)
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#endif /* PLATFORM_DEF_H */
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@ -1,5 +1,5 @@
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#
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# Copyright (c) 2013-2021, ARM Limited and Contributors. All rights reserved.
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# Copyright (c) 2013-2022, ARM Limited and Contributors. All rights reserved.
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#
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# SPDX-License-Identifier: BSD-3-Clause
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#
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@ -57,11 +57,7 @@ PLAT_BL_COMMON_SOURCES += ${XLAT_TABLES_LIB_SRCS}
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ifneq (${TRUSTED_BOARD_BOOT},0)
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include drivers/auth/mbedtls/mbedtls_crypto.mk
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include drivers/auth/mbedtls/mbedtls_x509.mk
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AUTH_SOURCES := drivers/auth/auth_mod.c \
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drivers/auth/crypto_mod.c \
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drivers/auth/img_parser_mod.c \
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drivers/auth/tbbr/tbbr_cot_common.c
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@ -78,6 +74,8 @@ ifneq (${TRUSTED_BOARD_BOOT},0)
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$(PLAT_QEMU_COMMON_PATH)/qemu_rotpk.S \
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drivers/auth/tbbr/tbbr_cot_bl2.c
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include drivers/auth/mbedtls/mbedtls_x509.mk
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ROT_KEY = $(BUILD_PLAT)/rot_key.pem
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ROTPK_HASH = $(BUILD_PLAT)/rotpk_sha256.bin
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@ -98,6 +96,34 @@ ifneq (${TRUSTED_BOARD_BOOT},0)
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openssl dgst -sha256 -binary > $@ 2>/dev/null
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endif
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# Include Measured Boot makefile before any Crypto library makefile.
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# Crypto library makefile may need default definitions of Measured Boot build
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# flags present in Measured Boot makefile.
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ifeq (${MEASURED_BOOT},1)
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MEASURED_BOOT_MK := drivers/measured_boot/event_log/event_log.mk
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$(info Including ${MEASURED_BOOT_MK})
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include ${MEASURED_BOOT_MK}
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BL2_SOURCES += plat/qemu/qemu/qemu_measured_boot.c \
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plat/qemu/qemu/qemu_common_measured_boot.c \
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plat/qemu/qemu/qemu_helpers.c \
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${EVENT_LOG_SOURCES}
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BL1_SOURCES += plat/qemu/qemu/qemu_bl1_measured_boot.c
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endif
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ifneq ($(filter 1,${MEASURED_BOOT} ${TRUSTED_BOARD_BOOT}),)
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CRYPTO_SOURCES := drivers/auth/crypto_mod.c
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BL1_SOURCES += ${CRYPTO_SOURCES}
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BL2_SOURCES += ${CRYPTO_SOURCES}
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# We expect to locate the *.mk files under the directories specified below
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#
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include drivers/auth/mbedtls/mbedtls_crypto.mk
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endif
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BL1_SOURCES += drivers/io/io_semihosting.c \
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drivers/io/io_storage.c \
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drivers/io/io_fip.c \
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@ -131,6 +157,7 @@ BL2_SOURCES += drivers/io/io_semihosting.c \
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${PLAT_QEMU_COMMON_PATH}/qemu_bl2_mem_params_desc.c \
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${PLAT_QEMU_COMMON_PATH}/qemu_image_load.c \
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common/fdt_fixup.c \
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common/fdt_wrappers.c \
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common/desc_image_load.c
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ifeq ($(add-lib-optee),yes)
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28
plat/qemu/qemu/qemu_bl1_measured_boot.c
Normal file
28
plat/qemu/qemu/qemu_bl1_measured_boot.c
Normal file
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@ -0,0 +1,28 @@
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/*
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* Copyright (c) 2022, Arm Limited. All rights reserved.
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* Copyright (c) 2022, Linaro.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <stdint.h>
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#include <common/desc_image_load.h>
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/*
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* Add dummy functions for measured boot for BL1.
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* In most of the SoC's, ROM/BL1 code is pre-built. So we are assumimg that
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* it doesn't have the capability to do measurements and extend eventlog.
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* hence these are dummy functions.
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*/
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void bl1_plat_mboot_init(void)
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{
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}
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void bl1_plat_mboot_finish(void)
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{
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}
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int plat_mboot_measure_image(unsigned int image_id, image_info_t *image_data)
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{
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return 0;
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}
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34
plat/qemu/qemu/qemu_common_measured_boot.c
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34
plat/qemu/qemu/qemu_common_measured_boot.c
Normal file
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@ -0,0 +1,34 @@
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/*
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* Copyright (c) 2022, Linaro.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <assert.h>
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#include <stdint.h>
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#include <common/desc_image_load.h>
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#include <drivers/measured_boot/event_log/event_log.h>
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#include <plat/common/platform.h>
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extern event_log_metadata_t qemu_event_log_metadata[];
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const event_log_metadata_t *plat_event_log_get_metadata(void)
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{
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return qemu_event_log_metadata;
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}
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int plat_mboot_measure_image(unsigned int image_id, image_info_t *image_data)
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{
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/* Calculate image hash and record data in Event Log */
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int err = event_log_measure_and_record(image_data->image_base,
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image_data->image_size,
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image_id);
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if (err != 0) {
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ERROR("%s%s image id %u (%i)\n",
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"Failed to ", "record", image_id, err);
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return err;
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}
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return 0;
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}
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214
plat/qemu/qemu/qemu_helpers.c
Normal file
214
plat/qemu/qemu/qemu_helpers.c
Normal file
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@ -0,0 +1,214 @@
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/*
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* Copyright (c) 2022, Linaro.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <assert.h>
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#if MEASURED_BOOT
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#include <common/desc_image_load.h>
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#endif
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#include <common/fdt_wrappers.h>
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#include <libfdt.h>
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#ifdef SPD_opteed
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/*
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* 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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*/
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#define DTB_PROP_HW_SM_LOG_ADDR "tpm_event_log_sm_addr"
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#endif
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#define DTB_PROP_HW_LOG_ADDR "tpm_event_log_addr"
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#define DTB_PROP_HW_LOG_SIZE "tpm_event_log_size"
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#if MEASURED_BOOT
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#ifdef SPD_opteed
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int qemu_set_tee_fw_info(uintptr_t config_base, uintptr_t log_addr,
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size_t log_size)
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{
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int offs, err = 0;
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void *dtb = (void *)config_base;
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const char *compatible = "arm,tpm_event_log";
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uint64_t sec_base = cpu_to_fdt64(log_addr);
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uint32_t sz = cpu_to_fdt32(log_size);
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offs = fdtw_find_or_add_subnode(dtb, 0, "tpm-event-log");
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if (offs < 0) {
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ERROR("Failed to add node tpm-event-log %d\n", offs);
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return offs;
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}
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if (fdt_appendprop(dtb, offs, "compatible", compatible,
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strlen(compatible) + 1) < 0) {
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return -1;
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}
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err = fdt_setprop(dtb, offs, DTB_PROP_HW_SM_LOG_ADDR, &sec_base, 8);
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if (err < 0) {
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ERROR("Failed to add log addr err %d\n", err);
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return err;
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}
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err = fdt_setprop(dtb, offs, DTB_PROP_HW_LOG_SIZE, &sz, 4);
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if (err < 0) {
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ERROR("Failed to add log addr err %d\n", err);
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return err;
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}
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return err;
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}
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#endif
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/*
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* Write the Event Log address and its size in the DTB.
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*
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* This function is supposed to be called only by BL2.
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*
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* Returns:
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* 0 = success
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* < 0 = error
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*/
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static int qemu_set_event_log_info(uintptr_t config_base,
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#ifdef SPD_opteed
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uintptr_t sm_log_addr,
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#endif
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uintptr_t log_addr, size_t log_size)
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{
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/* As libfdt uses void *, we can't avoid this cast */
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void *dtb = (void *)config_base;
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const char *compatible_tpm = "tcg,tpm-tis-mmio";
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uint64_t base = cpu_to_fdt64(log_addr);
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uint32_t sz = cpu_to_fdt32(log_size);
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int err, node;
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err = fdt_open_into(dtb, dtb, PLAT_QEMU_DT_MAX_SIZE);
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if (err < 0) {
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ERROR("Invalid Device Tree at %p: error %d\n", dtb, err);
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return err;
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}
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/*
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* Verify that the DTB is valid, before attempting to write to it,
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* and get the DTB root node.
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*/
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/* Check if the pointer to DT is correct */
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err = fdt_check_header(dtb);
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if (err < 0) {
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WARN("Invalid DTB file passed\n");
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return err;
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}
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/*
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* Find the TPM node in device tree. On qemu, we assume it will
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* be sw-tpm.
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*/
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node = fdt_node_offset_by_compatible(dtb, -1, compatible_tpm);
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if (node < 0) {
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ERROR("The compatible property '%s' not%s", compatible_tpm,
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" found in the config\n");
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return node;
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}
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err = fdt_setprop(dtb, node, DTB_PROP_HW_LOG_ADDR, &base, 8);
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if (err < 0) {
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ERROR("Failed to add log addr err %d\n", err);
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return err;
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}
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err = fdt_setprop(dtb, node, DTB_PROP_HW_LOG_SIZE, &sz, 4);
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if (err < 0) {
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ERROR("Failed to add log addr err %d\n", err);
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return err;
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}
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#ifdef SPD_opteed
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err = qemu_set_tee_fw_info(config_base, sm_log_addr, log_size);
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if (err < 0) {
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ERROR("Failed to add tpm-event-node at %p: err %d\n", dtb, err);
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return err;
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}
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#endif
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err = fdt_pack(dtb);
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if (err < 0) {
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ERROR("Failed to pack Device Tree at %p: err %d\n", dtb, err);
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return err;
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}
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/*
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* Ensure that the info written to the DTB is visible
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* to other images.
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*/
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flush_dcache_range(config_base, fdt_totalsize(dtb));
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return err;
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}
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/*
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* This function writes the Event Log address and its size
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* in the TOS_FW_CONFIG DTB.
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*
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* This function is supposed to be called only by BL2.
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*
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* Returns:
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* 0 = success
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* < 0 = error
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*/
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int qemu_set_tos_fw_info(uintptr_t config_base, uintptr_t log_addr,
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size_t log_size)
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{
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int err = 0;
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assert(config_base != 0UL);
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assert(log_addr != 0UL);
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/*
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* FIXME - add code to add/update Log address and it's
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* size in TOS FW CONFIG.
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* For now we don't have support for TOS FW config in OP-TEE.
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* So leave this function blank
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*/
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return err;
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}
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/*
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* This function writes the Event Log address and its size
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* in the QEMU DTB.
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*
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* This function is supposed to be called only by BL2.
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*
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* Returns:
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* 0 = success
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* < 0 = error
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*/
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int qemu_set_nt_fw_info(
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#ifdef SPD_opteed
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uintptr_t log_addr,
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#endif
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size_t log_size, uintptr_t *ns_log_addr)
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{
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uintptr_t ns_addr;
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int err;
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assert(ns_log_addr != NULL);
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ns_addr = PLAT_QEMU_DT_BASE + PLAT_QEMU_DT_MAX_SIZE;
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/* Write the Event Log address and its size in the DTB */
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err = qemu_set_event_log_info(PLAT_QEMU_DT_BASE,
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#ifdef SPD_opteed
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log_addr,
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#endif
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ns_addr, log_size);
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/* Return Event Log address in Non-secure memory */
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*ns_log_addr = (err < 0) ? 0UL : ns_addr;
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return err;
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}
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#endif /* MEASURED_BOOT */
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103
plat/qemu/qemu/qemu_measured_boot.c
Normal file
103
plat/qemu/qemu/qemu_measured_boot.c
Normal file
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@ -0,0 +1,103 @@
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/*
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* Copyright (c) 2022, Arm Limited. All rights reserved.
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* Copyright (c) 2022, Linaro.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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||||
*/
|
||||
|
||||
#include <stdint.h>
|
||||
|
||||
#include <drivers/measured_boot/event_log/event_log.h>
|
||||
#include <plat/common/common_def.h>
|
||||
#include <tools_share/tbbr_oid.h>
|
||||
|
||||
#include "../common/qemu_private.h"
|
||||
|
||||
/* Event Log data */
|
||||
static uint8_t event_log[PLAT_EVENT_LOG_MAX_SIZE];
|
||||
static uint64_t event_log_base;
|
||||
|
||||
/* FVP table with platform specific image IDs, names and PCRs */
|
||||
const event_log_metadata_t qemu_event_log_metadata[] = {
|
||||
{ BL31_IMAGE_ID, EVLOG_BL31_STRING, PCR_0 },
|
||||
{ BL32_IMAGE_ID, EVLOG_BL32_STRING, PCR_0 },
|
||||
{ BL32_EXTRA1_IMAGE_ID, EVLOG_BL32_EXTRA1_STRING, PCR_0 },
|
||||
{ BL32_EXTRA2_IMAGE_ID, EVLOG_BL32_EXTRA2_STRING, PCR_0 },
|
||||
{ BL33_IMAGE_ID, EVLOG_BL33_STRING, PCR_0 },
|
||||
{ HW_CONFIG_ID, EVLOG_HW_CONFIG_STRING, PCR_0 },
|
||||
{ NT_FW_CONFIG_ID, EVLOG_NT_FW_CONFIG_STRING, PCR_0 },
|
||||
{ SCP_BL2_IMAGE_ID, EVLOG_SCP_BL2_STRING, PCR_0 },
|
||||
{ SOC_FW_CONFIG_ID, EVLOG_SOC_FW_CONFIG_STRING, PCR_0 },
|
||||
{ TOS_FW_CONFIG_ID, EVLOG_TOS_FW_CONFIG_STRING, PCR_0 },
|
||||
|
||||
{ EVLOG_INVALID_ID, NULL, (unsigned int)(-1) } /* Terminator */
|
||||
};
|
||||
|
||||
void bl2_plat_mboot_init(void)
|
||||
{
|
||||
/*
|
||||
* Here we assume that BL1/ROM code doesn't have the driver
|
||||
* to measure the BL2 code which is a common case for
|
||||
* already existing platforms
|
||||
*/
|
||||
event_log_init(event_log, event_log + sizeof(event_log));
|
||||
event_log_write_header();
|
||||
|
||||
/*
|
||||
* TBD - Add code to do self measurement of BL2 code and add an
|
||||
* event for BL2 measurement
|
||||
*/
|
||||
|
||||
event_log_base = (uintptr_t)event_log;
|
||||
}
|
||||
|
||||
void bl2_plat_mboot_finish(void)
|
||||
{
|
||||
int rc;
|
||||
|
||||
/* Event Log address in Non-Secure memory */
|
||||
uintptr_t ns_log_addr;
|
||||
|
||||
/* Event Log filled size */
|
||||
size_t event_log_cur_size;
|
||||
|
||||
event_log_cur_size = event_log_get_cur_size((uint8_t *)event_log_base);
|
||||
|
||||
rc = qemu_set_nt_fw_info(
|
||||
#ifdef SPD_opteed
|
||||
(uintptr_t)event_log_base,
|
||||
#endif
|
||||
event_log_cur_size, &ns_log_addr);
|
||||
if (rc != 0) {
|
||||
ERROR("%s(): Unable to update %s_FW_CONFIG\n",
|
||||
__func__, "NT");
|
||||
/*
|
||||
* It is a fatal error because on QEMU secure world software
|
||||
* assumes that a valid event log exists and will use it to
|
||||
* record the measurements into the fTPM or sw-tpm.
|
||||
* Note: In QEMU platform, OP-TEE uses nt_fw_config to get the
|
||||
* secure Event Log buffer address.
|
||||
*/
|
||||
panic();
|
||||
}
|
||||
|
||||
/* Copy Event Log to Non-secure memory */
|
||||
(void)memcpy((void *)ns_log_addr, (const void *)event_log_base,
|
||||
event_log_cur_size);
|
||||
|
||||
/* Ensure that the Event Log is visible in Non-secure memory */
|
||||
flush_dcache_range(ns_log_addr, event_log_cur_size);
|
||||
|
||||
#if defined(SPD_tspd) || defined(SPD_spmd)
|
||||
/* Set Event Log data in TOS_FW_CONFIG */
|
||||
rc = qemu_set_tos_fw_info((uintptr_t)event_log_base,
|
||||
event_log_cur_size);
|
||||
if (rc != 0) {
|
||||
ERROR("%s(): Unable to update %s_FW_CONFIG\n",
|
||||
__func__, "TOS");
|
||||
panic();
|
||||
}
|
||||
#endif /* defined(SPD_tspd) || defined(SPD_spmd) */
|
||||
|
||||
dump_event_log((uint8_t *)event_log_base, event_log_cur_size);
|
||||
}
|
||||
Loading…
Add table
Reference in a new issue