Changelog entry noting the behavior change and storage format change
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/ChangeLog.d/psa-lifetime-locations.txt b/ChangeLog.d/psa-lifetime-locations.txt
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+Default behavior changes
+ * In the experimental PSA secure element interface, change the encoding of
+ key lifetimes to encode a persistence level and the location. Although C
+ prototypes do not effectively change, code calling
+ psa_register_se_driver() must be modified to pass the driver's location
+ instead of the keys' lifetime. If the library is upgraded on an existing
+ device, keys created with the old lifetime value will not be readable or
+ removable through Mbed TLS after the upgrade.