Clarification on Bloblist Initialization Settings

Harrison Mutai Harrison.Mutai at arm.com
Thu Nov 14 21:41:27 CET 2024


Hi all,
I wanted to clarify some details about the settings for initializing a Bloblist (i.e., CONFIG_BLOBLIST_ALLOC, CONFIG_BLOBLIST_FIXED, CONFIG_BLOBLIST_PASSAGE). The documentation states that if CONFIG_BLOBLIST_PASSAGE is selected, it uses the bloblist in the incoming standard passage.
Does this mean that the bloblist is used in-place wherever the previous stage places it? For example, if TF-A passes a bloblist at an address specified in the platform's boot parameters, would this mode use the bloblist in that location?
The reason I ask is that I'm preparing some patches to add bloblist support to vexpress64, and I'm looking to configure this platform without specifying BLOBLIST_ADDR or BLOBLIST_SIZE (i.e., automatically detect these).
Thanks for your help!
Best regards,
Harrison

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