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031b33ef1a
Traditionally, new xstate components have been assigned sequentially, aligning feature numbers with their offsets in the XSAVE buffer. However, this ordering is not architecturally mandated in the non-compacted format, where a component's offset may not correspond to its feature number. The kernel caches CPUID-reported xstate component details, including size and offset in the non-compacted format. As part of this process, a sanity check is also conducted to ensure alignment between feature numbers and offsets. This check was likely intended as a general guideline rather than a strict requirement. Upcoming changes will support out-of-order offsets. Remove the check as becoming obsolete. Signed-off-by: Chang S. Bae <chang.seok.bae@intel.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Cc: Andy Lutomirski <luto@kernel.org> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Oleg Nesterov <oleg@redhat.com> Link: https://lore.kernel.org/r/20250320234301.8342-2-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 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.