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d504d1247e
Add functions to manage global ASID space. Multithreaded processes that are simultaneously active on 4 or more CPUs can get a global ASID, resulting in the same PCID being used for that process on every CPU. This in turn will allow the kernel to use hardware-assisted TLB flushing through AMD INVLPGB or Intel RAR for these processes. [ bp: - Extend use_global_asid() comment - s/X86_BROADCAST_TLB_FLUSH/BROADCAST_TLB_FLUSH/g - other touchups ] Signed-off-by: Rik van Riel <riel@surriel.com> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Signed-off-by: Ingo Molnar <mingo@kernel.org> Link: https://lore.kernel.org/r/20250226030129.530345-8-riel@surriel.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.