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71ef453355
PKRU is being removed from the kernel XSAVE/FPU buffers. This removal will probably include warnings for code that look up PKRU in those buffers. KVM currently looks up the location of PKRU but doesn't even use the pointer that it gets back. Rework the code to avoid calling get_xsave_addr() except in cases where its result is actually used. This makes the code more clear and also avoids the inevitable PKRU warnings. This is probably a good cleanup and could go upstream idependently of any PKRU rework. Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Borislav Petkov <bp@suse.de> Link: https://lkml.kernel.org/r/20210623121453.541037562@linutronix.de
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.