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db3e7321b4
To handle the dynamic sizing of buffers on first use the XFD MSR has to be armed. Store the delta between the maximum available and the default feature bits in init_fpstate where it can be retrieved for task creation. If the delta is non zero then dynamic features are enabled. This needs also to enable the static key which guards the XFD updates. This is delayed to an initcall because the FPU setup runs before jump labels are initialized. Signed-off-by: Chang S. Bae <chang.seok.bae@intel.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Borislav Petkov <bp@suse.de> Link: https://lore.kernel.org/r/20211021225527.10184-23-chang.seok.bae@intel.com |
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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.