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OP-TEE / build

Makefiles to use OP-TEE on various platforms
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stm32mp1: retrieve unique eMMC CID for tee-supplicant #760

Closed etienne-lms closed 3 weeks ago

etienne-lms commented 3 weeks ago

Retrieve the eMMC CID if only one eMMC device is found. We expect it to be used for OP-TEE RPMB secure storage. This change allows OS based on Linux kernel v6.2 or later to be more reliable on identifying the eMMC mmcblk device as since Linux kernel v6.2 the device index assigned by the kernel may change from one cold boot to another when they are several mmcblk devices on the platform, for example a plugged SD card and a soldered eMMC device.

etienne-lms commented 3 weeks ago

Tag applied. Thanks again for the pointer. It seems these instruction are deployed in Yocto recipes since quite a while :)