21d59e3e2c
AMD Performance Monitoring Version 2 (PerfMonV2) introduces some new Core PMU features such as detection of the number of available PMCs and managing PMCs using global registers namely, PerfCntrGlobalCtl and PerfCntrGlobalStatus. Clearing PerfCntrGlobalCtl and PerfCntrGlobalStatus ensures that all PMCs are inactive and have no pending overflows when CPUs are onlined or offlined. The PMU version (x86_pmu.version) now indicates PerfMonV2 support and will be used to bypass the new features on unsupported processors. Signed-off-by: Sandipan Das <sandipan.das@amd.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/dc8672ecbddff394e088ca8abf94b089b8ecc2e7.1650515382.git.sandipan.das@amd.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.