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0779221e71
Before:
1f299fad1e: ("efi/x86: Limit EFI old memory map to SGI UV machines")
enabling the old EFI memory map on mixed mode systems
disabled EFI runtime services altogether.
Given that efi=old_map is a debug feature designed to work around
firmware problems related to EFI runtime services, and disabling
them can be achieved more straightforwardly using 'noefi' or
'efi=noruntime', it makes more sense to ignore efi=old_map on
mixed mode systems.
Currently, we do neither, and try to use the old memory map in
combination with mixed mode routines, which results in crashes,
so let's fix this by making efi=old_map functional on native
systems only.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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.