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dce0c74d2d
Two new fields (the unit mask2, and the equal flag) are added in the IA32_PERFEVTSELx MSRs. They can be enumerated by the CPUID.23H.0.EBX. Update the config_mask in x86_pmu and x86_hybrid_pmu for the true layout of the PERFEVTSEL. Expose the new formats into sysfs if they are available. The umask extension reuses the same format attr name "umask" as the previous umask. Add umask2_show to determine/display the correct format for the current machine. Co-developed-by: Dapeng Mi <dapeng1.mi@linux.intel.com> Signed-off-by: Dapeng Mi <dapeng1.mi@linux.intel.com> Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Andi Kleen <ak@linux.intel.com> Reviewed-by: Ian Rogers <irogers@google.com> Link: https://lkml.kernel.org/r/20240626143545.480761-8-kan.liang@linux.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.