Date: Wed, 13 Jun 2018 12:06:42 +0100 From: Johannes Lundberg <johalun0@gmail.com> To: Konstantin Belousov <kostikbel@gmail.com> Cc: current@freebsd.org, amd64@freebsd.org Subject: Re: Ryzen public erratas Message-ID: <86602neyil.fsf@gmail.com> In-Reply-To: <20180613103535.GP2493@kib.kiev.ua> References: <20180613103535.GP2493@kib.kiev.ua>
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Konstantin Belousov writes: > Today I noted that AMD published the public errata document for Ryzens, > https://developer.amd.com/wp-content/resources/55449_1.12.pdf > > Some of the issues listed there looks quite relevant to the potential > hangs that some people still experience with the machines. I wrote > a script which should apply the recommended workarounds to the erratas > that I find interesting. > > To run it, kldload cpuctl, then apply the latest firmware update to your > CPU, then run the following shell script. Comments indicate the errata > number for the workarounds. > > Please report the results. If the script helps, I will code the kernel > change to apply the workarounds. > > #!/bin/sh > > # Enable workarounds for erratas listed in > # https://developer.amd.com/wp-content/resources/55449_1.12.pdf > > # 1057, 1109 > sysctl machdep.idle_mwait=0 > sysctl machdep.idle=hlt > > for x in /dev/cpuctl*; do > # 1021 > cpucontrol -m '0xc0011029|=0x2000' $x > # 1033 > cpucontrol -m '0xc0011020|=0x10' $x > # 1049 > cpucontrol -m '0xc0011028|=0x10' $x > # 1095 > cpucontrol -m '0xc0011020|=0x200000000000000' $x > done > Hi Thanks for the fix! I'm trying it now on my Ryzen 3 2200G which does experience some random occasional resets. About updating to latest firmware, is this something that's done from BIOS or from FreeBSD? If the latter, how? > _______________________________________________ > freebsd-current@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org"
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