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a018d2e3d4
CPUID.(EAX=07H, ECX=1):EAX[8] indicates whether the Architectural PerfMon Extension leaf (CPUID leaf 23) is supported. The "X86_FEATURE_..., word 12" is already mirrored from CPUID "0x00000007:1 (EAX)". Add X86_FEATURE_ARCH_PERFMON_EXT under the "word 12" section. The new Architectural PerfMon Extension leaf (CPUID leaf 23) will be supported in the perf_events subsystem later. The feature will not appear in /proc/cpuinfo. Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Acked-by: Peter Zijlstra <peterz@infradead.org> Link: https://lore.kernel.org/r/20230104201349.1451191-4-kan.liang@linux.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.