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XCNTXT_MASK is 'all supported xfeatures' before introducing supervisor xstates. Rename it to XFEATURE_MASK_USER_SUPPORTED to make clear that these are user xstates. Replace XFEATURE_MASK_SUPERVISOR with the following: - XFEATURE_MASK_SUPERVISOR_SUPPORTED: Currently nothing. ENQCMD and Control-flow Enforcement Technology (CET) will be introduced in separate series. - XFEATURE_MASK_SUPERVISOR_UNSUPPORTED: Currently only Processor Trace. - XFEATURE_MASK_SUPERVISOR_ALL: the combination of above. Co-developed-by: Yu-cheng Yu <yu-cheng.yu@intel.com> Signed-off-by: Fenghua Yu <fenghua.yu@intel.com> Signed-off-by: Yu-cheng Yu <yu-cheng.yu@intel.com> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Tony Luck <tony.luck@intel.com> Link: https://lkml.kernel.org/r/20200512145444.15483-3-yu-cheng.yu@intel.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.