[fpc-devel] [PATCH] Add support for Hygon Dhyana processor

Ralf Quint freedos.la at gmail.com
Fri May 24 21:53:29 CEST 2019

On 5/23/2019 2:10 AM, Jinke Fan wrote:
> Hi,
>    This patch adds vendor id detection for Hygon Dhyana CPUs.
>    Could anyone help me with submit it?
> More details can be found on:
> http://lkml.kernel.org/r/5ce86123a7b9dad925ac583d88d2f921040e859b.1538583282.git.puwen@hygon.cn

Why would this be needed? I just had to look up what this actually is 
and it doesn't seem to be necessary to distinguish between that 
particular CPU (quote from Wikipedia):

> The initial microprocessor created in 2018 is the Hygon Dhyana 
> <https://en.wikipedia.org/wiki/AMD_Epyc#Chinese_variants> system on a 
> chip <https://en.wikipedia.org/wiki/System_on_a_chip>.^[1] 
> <https://en.wikipedia.org/wiki/AMD%E2%80%93Chinese_joint_venture#cite_note-2018-toms-hardware-1> 
> ^[2] 
> <https://en.wikipedia.org/wiki/AMD%E2%80%93Chinese_joint_venture#cite_note-2018-phoronix-2> 
> It is noted to be a variant of the AMD EPYC 
> <https://en.wikipedia.org/wiki/EPYC> and is so similar that "there is 
> little to no differentiation between the chips".^[1] 
> <https://en.wikipedia.org/wiki/AMD%E2%80%93Chinese_joint_venture#cite_note-2018-toms-hardware-1> 
> It has been noted that there is "less than 200 lines of new kernel 
> code" for Linux <https://en.wikipedia.org/wiki/Linux> kernel support, 
> and that the Dhyana is "mostly a re-branded Zen CPU for the Chinese 
> server market".^[2] 
> <https://en.wikipedia.org/wiki/AMD%E2%80%93Chinese_joint_venture#cite_note-2018-phoronix-2> 

^Are you aware of any specifics of that processor that it would require 
a distinction and direct support for that CPU version, beside the geek 


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