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19476a592b
Even though the platform->plat_rapl_msrs enumeration may be accurate, a VM, such as AWS Nitro Hypervisor, may deny access to the underlying MSRs. Probe if PKG_ENERGY is readable and non-zero. If no, ignore all RAPL MSRs. Reported-by: Emily Ehlert <ehemily@amazon.de> Tested-by: Emily Ehlert <ehemily@amazon.de> Signed-off-by: Len Brown <len.brown@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 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.