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doc: uefi: capsules: Add Capsule Update porting section

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Created a capsule update porting section in the documentation that outlines
the steps a board developer must do when porting from an existing reference
board implementation.

In particular, added a big warning that new capsule GUID's need to be
defined.

Signed-off-by: Jonathan Humphreys <j-humphreys@ti.com>
Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
This commit is contained in:
Jonathan Humphreys
2024-06-14 11:35:28 -05:00
committed by Tom Rini
parent 2c92ec69d1
commit cedad0670e
1 changed files with 12 additions and 0 deletions
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doc/develop/uefi/uefi.rst
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@@ -631,6 +631,18 @@ where version.dtso looks like::
The properties of image-type-id and image-index must match the value
defined in the efi_fw_image array as image_type_id and image_index.
Porting Capsule Updates to new boards
*************************************
It is important, when using a reference board as a starting point for a custom
board, that certain steps are taken to properly support Capsule Updates.
Capsule GUIDs need to be unique for each firmware and board. That is, if two
firmwares are built from the same source but result in different binaries
because they are built for different boards, they should have different GUIDs.
Therefore it is important when creating support for a new board, new GUIDs are
defined in the board's header file. *DO NOT* reuse capsule GUIDs.
Executing the boot manager
~~~~~~~~~~~~~~~~~~~~~~~~~~