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280b68a3b3
Hygon systems support the MONITOR/MWAIT instructions and these can be used for ACPI C1 in the same way as on AMD and Intel systems. The BIOS declares a C1 state in _CST to use FFH and CPUID_Fn00000005_EDX is non-zero on Hygon systems. Allow ffh_cstate_init() to succeed on Hygon systems to default using FFH MWAIT instead of HALT for ACPI C1. Signed-off-by: Pu Wen <puwen@hygon.cn> Signed-off-by: Borislav Petkov <bp@suse.de> Link: https://lkml.kernel.org/r/20210528081417.31474-1-puwen@hygon.cn
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.