mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-05-04 04:28:10 -04:00
5da7936719
There are two code paths in the startup code to program an IDT: one that runs from the 1:1 mapping and one that runs from the virtual kernel mapping. Currently, these are strictly separate because fixup_pointer() is used on the 1:1 path, which will produce the wrong value when used while executing from the virtual kernel mapping. Switch to RIP_REL_REF() so that the two code paths can be merged. Also, move the GDT and IDT descriptors to the stack so that they can be referenced directly, rather than via RIP_REL_REF(). Rename startup_64_setup_env() to startup_64_setup_gdt_idt() while at it, to make the call from assembler self-documenting. Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Link: https://lore.kernel.org/r/20240221113506.2565718-19-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 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.