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<div class="moz-cite-prefix">On 5/23/2019 2:10 AM, Jinke Fan wrote:<br>
</div>
<blockquote type="cite"
cite="mid:20190523091055.81643-1-fanjinke51@yeah.net">
<pre class="moz-quote-pre" wrap="">Hi,
This patch adds vendor id detection for Hygon Dhyana CPUs.
Could anyone help me with submit it?
More details can be found on:
<a class="moz-txt-link-freetext" href="http://lkml.kernel.org/r/5ce86123a7b9dad925ac583d88d2f921040e859b.1538583282.git.puwen@hygon.cn">http://lkml.kernel.org/r/5ce86123a7b9dad925ac583d88d2f921040e859b.1538583282.git.puwen@hygon.cn</a>
</pre>
</blockquote>
<p>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):</p>
<p>
<blockquote type="cite">The initial microprocessor created in 2018
is the <a
href="https://en.wikipedia.org/wiki/AMD_Epyc#Chinese_variants"
class="mw-redirect" title="AMD Epyc">Hygon Dhyana</a> <a
href="https://en.wikipedia.org/wiki/System_on_a_chip"
title="System on a chip">system on a chip</a>.<sup
id="cite_ref-2018-toms-hardware_1-9" class="reference"><a
href="https://en.wikipedia.org/wiki/AMD%E2%80%93Chinese_joint_venture#cite_note-2018-toms-hardware-1">[1]</a></sup><sup
id="cite_ref-2018-phoronix_2-1" class="reference"><a
href="https://en.wikipedia.org/wiki/AMD%E2%80%93Chinese_joint_venture#cite_note-2018-phoronix-2">[2]</a></sup>
It is noted to be a variant of the AMD <a
href="https://en.wikipedia.org/wiki/EPYC" class="mw-redirect"
title="EPYC">EPYC</a> and is so similar that "there is little
to no differentiation between the chips".<sup
id="cite_ref-2018-toms-hardware_1-10" class="reference"><a
href="https://en.wikipedia.org/wiki/AMD%E2%80%93Chinese_joint_venture#cite_note-2018-toms-hardware-1">[1]</a></sup>
It has been noted that there is "less than 200 lines of new
kernel code" for <a href="https://en.wikipedia.org/wiki/Linux"
title="Linux">Linux</a> kernel support, and that the Dhyana is
"mostly a re-branded Zen CPU for the Chinese server market".<sup
id="cite_ref-2018-phoronix_2-2" class="reference"><a
href="https://en.wikipedia.org/wiki/AMD%E2%80%93Chinese_joint_venture#cite_note-2018-phoronix-2">[2]</a></sup></blockquote>
<sup>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 factor?</sup></p>
<p><sup>Ralf</sup><br>
<br>
</p>
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