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The 5-level paging trampoline is used by both the EFI stub and the traditional decompressor. Move it out of the decompressor sources into the newly minted arch/x86/boot/startup/ sub-directory which will hold startup code that may be shared between the decompressor, the EFI stub and the kernel proper, and needs to tolerate being called during early boot, before the kernel virtual mapping has been created. This will allow the 5-level paging trampoline to be used by EFI boot images such as zboot that omit the traditional decompressor entirely. Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Cc: David Woodhouse <dwmw@amazon.co.uk> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Kees Cook <keescook@chromium.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: https://lore.kernel.org/r/20250401133416.1436741-10-ardb+git@google.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 reStructuredText 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.