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During DF C-State, Perfmon counters outside of range 1D700-1D7FF will encounter SLVERR affecting xGMI performance monitoring. PerfmonCtr[7:4] is being added to avoid SLVERR during read since it falls within this range. PerfmonCtl[7:4] is being added in order to arm PerfmonCtr[7:4]. Since PerfmonCtl[7:4] exists outside of range 1D700-1D7FF, DF routines will be enabled to opportunistically re-arm PerfmonCtl[7:4] on retry after SLVERR. Signed-off-by: Jonathan Kim <Jonathan.Kim@amd.com> Acked-by: Alex Deucher <Alexander.Deucher@amd.com> Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@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.