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A firmware file can contains more than one section with secure type, so use secure information from efuse to choose the one with matched cryptography method. Then choose key data from MSS poll (multiple security section pool; see below picture) according to key_index from efuse. Note that the size of MSS pool isn't included in section size defined in firmware header, so we also need to parse header of MSS pool to get its size as shift to parse next section. If secure boot isn't supported by current hardware, the first secure section will be adopted, and no need additional process to key data. +---------------------------+ | firmware header | | | | +-----------------------+ | | | section type/size * N-|-|-------+ | | ... | | | | +-----------------------+ | | +---------------------------+ | : : | +---------------------------+ -\ | | secure section type (ID:9)| | | | | | <--+ | | | +---------------------------+ -/ |MSS Pool for above section | | | | | +---------------------------+ Signed-off-by: Ping-Ke Shih <pkshih@realtek.com> Signed-off-by: Kalle Valo <kvalo@kernel.org> Link: https://msgid.link/20240204012627.9647-4-pkshih@realtek.com
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.