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List:       wireguard
Subject:    Re: Ryzen 3000 CPU soft lockup
From:       trulyliu <trulyliu () gmail ! com>
Date:       2019-08-27 5:41:27
Message-ID: CANNc_DQL+xMLT+2-W5UGUCq41hpCZHSCnuKU49s0E3WP3EQ9BQ () mail ! gmail ! com
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[Attachment #2 (multipart/alternative)]


ASUS  does not follow AMD microcode release in time, the latest motherboard
bios are using two month ago AMD
microcode.
Tried CPU's microcode with kernel, didn't work either.
fortunately, found a solution from arch linux comunity.  Appending nordrand
kernel parameter in grub resolved the issue.
Hope this can be documented some where to help others.


Jason A. Donenfeld <Jason@zx2c4.com> =E4=BA=8E 2019=E5=B9=B48=E6=9C=8825=E6=
=97=A5=E5=91=A8=E6=97=A5 23:51=E5=86=99=E9=81=93=EF=BC=9A

> WireGuard uses get_random_u32 which uses rdrand. AMD shipped with a
> broken rdrand. Update your CPU's microcode or your motherboard's BIOS
> and all should be good.
>

[Attachment #5 (text/html)]

<div dir="auto"><div>ASUS   does not follow AMD microcode release in time, the latest \
motherboard bios are using two month ago AMD  </div><div \
dir="auto">microcode.</div><div dir="auto">Tried CPU&#39;s microcode with kernel, \
didn&#39;t work either.</div><div dir="auto">fortunately, found a solution from arch \
linux comunity.   Appending nordrand kernel parameter in grub resolved the \
issue.</div><div dir="auto">Hope this can be documented some where to help \
others.</div><div dir="auto"><br></div><div dir="auto"><br><div class="gmail_quote" \
dir="auto"><div dir="ltr" class="gmail_attr">Jason A. Donenfeld &lt;<a \
href="mailto:Jason@zx2c4.com">Jason@zx2c4.com</a>&gt; 于 2019年8月25日周日 \
23:51写道：<br></div><blockquote class="gmail_quote" style="margin:0 0 0 \
.8ex;border-left:1px #ccc solid;padding-left:1ex">WireGuard uses get_random_u32 which \
uses rdrand. AMD shipped with a<br> broken rdrand. Update your CPU&#39;s microcode or \
your motherboard&#39;s BIOS<br> and all should be good.<br>
</blockquote></div></div></div>



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