fd538dcb11
Allow replacing the default naming scheme of the stored settings by providing a custom function that fills a name buffer based on the ITS entry UID. Signed-off-by: Tomi Fontanilles <tomi.fontanilles@nordicsemi.no>
85 lines
3.7 KiB
Plaintext
85 lines
3.7 KiB
Plaintext
# Copyright (c) 2024 Nordic Semiconductor
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# SPDX-License-Identifier: Apache-2.0
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choice SECURE_STORAGE_ITS_STORE_IMPLEMENTATION
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prompt "ITS store module implementation"
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DT_ITS_PARTITION := $(dt_chosen_path,secure_storage_its_partition)
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DT_CHOSEN_Z_SETTINGS_PARTITION := zephyr,settings-partition
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DT_SETTINGS_PARTITIION := $(dt_chosen_path,$(DT_CHOSEN_Z_SETTINGS_PARTITION))
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DT_STORAGE_PARTITION := $(dt_nodelabel_path,storage_partition)
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config SECURE_STORAGE_ITS_STORE_IMPLEMENTATION_ZMS
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bool "ITS store module implementation using ZMS for storage"
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depends on FLASH_HAS_DRIVER_ENABLED \
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&& $(dt_path_enabled,$(DT_ITS_PARTITION)) \
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&& $(dt_node_has_compat,$(dt_node_parent,$(DT_ITS_PARTITION)),fixed-partitions)
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depends on ZMS
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help
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This implementation of the ITS store module makes direct use of ZMS for storage.
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It needs a `secure_storage_its_partition` devicetree chosen property that points
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to a fixed storage partition that will be dedicated to the ITS. It has lower
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overhead compared to the settings-based implementation, both in terms of runtime
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execution and storage space, and also ROM footprint if the settings subsystem is disabled.
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As this implementations directly maps the PSA storage UIDs to ZMS entry IDs, it limits
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their values to the first 30 bits.
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config SECURE_STORAGE_ITS_STORE_IMPLEMENTATION_SETTINGS
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bool "ITS store module implementation using the settings subsystem for storage"
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depends on FLASH_HAS_DRIVER_ENABLED \
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&& (($(dt_path_enabled,$(DT_SETTINGS_PARTITIION)) \
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&& $(dt_node_has_compat,$(dt_node_parent,$(DT_SETTINGS_PARTITIION)),fixed-partitions))\
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|| ($(dt_path_enabled,$(DT_STORAGE_PARTITION)) \
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&& $(dt_node_has_compat,$(dt_node_parent,$(DT_STORAGE_PARTITION)),fixed-partitions)))
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depends on SETTINGS
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config SECURE_STORAGE_ITS_STORE_IMPLEMENTATION_NONE
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bool "No ITS store module implementation"
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config SECURE_STORAGE_ITS_STORE_IMPLEMENTATION_CUSTOM
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bool "Custom ITS store module implementation"
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help
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Implement the functions declared in <zephyr/secure_storage/its/store.h>.
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The header is made available when this Kconfig option is enabled.
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endchoice # SECURE_STORAGE_ITS_STORE_IMPLEMENTATION
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if SECURE_STORAGE_ITS_STORE_IMPLEMENTATION_ZMS
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config SECURE_STORAGE_ITS_STORE_ZMS_SECTOR_SIZE
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int "Sector size of the ZMS partition"
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default 4096
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help
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The sector size impacts the runtime behavior of ZMS and restricts the maximum
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ITS entry data size (which is the sector size minus ZMS and ITS overhead).
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Changing it will result in loss of existing data stored on a partition.
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It must be a multiple of the flash page size on devices that require an erase.
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See the ZMS documentation for more information.
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endif # SECURE_STORAGE_ITS_STORE_IMPLEMENTATION_ZMS
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if SECURE_STORAGE_ITS_STORE_IMPLEMENTATION_SETTINGS
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config SECURE_STORAGE_ITS_STORE_SETTINGS_NAME_CUSTOM
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bool "Custom naming scheme for the stored settings"
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help
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This allows to use custom names for the settings that the implementation uses
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instead of the default naming scheme.
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When enabling this, implement the secure_storage_its_store_settings_get_name()
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function declared in <zephyr/secure_storage/its/store/settings_get.h>
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and set CONFIG_SECURE_STORAGE_ITS_STORE_SETTINGS_NAME_MAX_LEN appropriately.
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The header file is made available when this Kconfig option is enabled.
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config SECURE_STORAGE_ITS_STORE_SETTINGS_PREFIX
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string "Subtree in which to store the settings, with a trailing slash. Can be empty."
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default "its/"
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depends on !SECURE_STORAGE_ITS_STORE_SETTINGS_NAME_CUSTOM
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config SECURE_STORAGE_ITS_STORE_SETTINGS_NAME_MAX_LEN
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int "Maximum setting name length"
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range 2 64
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default 22 if !SECURE_STORAGE_ITS_STORE_SETTINGS_NAME_CUSTOM
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default 0
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endif # SECURE_STORAGE_ITS_STORE_IMPLEMENTATION_SETTINGS
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