86d333a8cc
Expose base_frequency to user space via cpufreq sysfs when HWP is in use. This HWP base frequency is read from the ACPI _CPC object if present, or from the HWP Capabilities MSR otherwise. On the majority of the HWP platforms the _CPC object will point to the HWP Capabilities MSR using the "Functional Fixed Hardware" address space type. The address space type also can simply be ACPI_TYPE_INTEGER, however, in which case the platform firmware can set its value at the initialization time based on the system constraints. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> [ rjw: Changelog ] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.