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Borislav Petkov (AMD)andGreg Kroah-Hartman
e7b2ccfed0
commitd1744a4c97upstream Commit in Fixes changed how a microcode patch is loaded on Zen and newer but the patch matching needs to happen with different rigidity, depending on what is being done: 1) When the patch is added to the patches cache, the stepping must be ignored because the driver still supports different steppings per system 2) When the patch is matched for loading, then the stepping must be taken into account because each CPU needs the patch matching its exact stepping Take care of that by making the matching smarter. Fixes:94838d230a("x86/microcode/AMD: Use the family,model,stepping encoded in the patch ID") Reported-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Tested-by: Jens Axboe <axboe@kernel.dk> Link: https://lore.kernel.org/r/91194406-3fdf-4e38-9838-d334af538f74@kernel.dk Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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.