microcode amd

fernandel

fernandel

Hi!

I have AMD CPU Familly 15 and I have in /boot/loader.conf cpu_microcode_name="/usr/local/share/cpucontrol/microcode_amd_fam15h.bin

In /usr/local/share/cpucontrol is also microcode_amd.bin. Would be the same if I have link in loader.conf on this file, please? Or is the same.
And another question how I know that microcode works?

Thank you.
 
fernandel said:
And another question how I know that microcode works?
Click to expand...
forums.FreeBSD.org

Intel microcode updates and what do they entail?

Hello, a topic that I have never studied in depth and therefore I ask you for an explanation as simple as possible. In one of the many FreeBSD installation tutorials I remember seeing it suggested to also set up the microcode update which I think is possible for both Intel and AMD CPUs. I have...
forums.FreeBSD.org forums.FreeBSD.org

You will see messages from booting. What if you diff -a those files.
 
This repository includes microcode container files for family 15h, 16h, 17h, and 19h AMD CPUs. Microcode patches for families earlier than 15h are included in the microcode_amd.bin microcode container file. The microcode patches included in an AMD CPU microcode container file can be listed using the script in the following git repository
Click to expand...

AMD Ryzen 5 PRO 3500U Mobile processor - YM350BC4T4MFG

AMD Ryzen 5 PRO 3500U notebook APU: detailed specifications, side by side comparison, FAQ and more from CPU-World
www.cpu-world.com www.cpu-world.com
Family:23 (017h)
Model:24 (018h)
 
CuatroTorres said:
Check:

dmesg | grep -i microcode

or
sysutils/x86info
x86info -a | grep -i microcode

Does it return the same if you run it as a service?
service microcode_update onestart

It may not detect any required patches.
Click to expand...
Microcode patch level: 0x8108102
dmesg doesn't show anything
service...
Updating CPU Microcode...
Re-evalulation of CPU flags Failed.

TY
 
Sorry. I forgot that I have in /etc/sysctl.conf kern.securelevel=0 and when system boot up it swithed to level 1.
After disabele it update works. The The Microcode patch level is still the same. Possible from before?

Thank you for the help.
 
You will see recent hardware validations with the same patch level. It is not relevant in itself.

You have an unofficial list of AMD microcode here. The last update is 4 years old.

CPUID signature:810F81
Family:23 (017h)
Model:24 (018h)

cpu00810F81_ver08108109_2019-04-17_CC05AB0D.bin​

Updated to MCE DB r1144 years ago

FYI:

Latest is not always better or tested. Manufacturers and OS mainteners usually have some insider/confidential info from microcode vendors on what got changed/fixed at newer microcode releases so if they ship older microcodes, it could be that newer versions have not been thoroughly tested, have been retracted/downgraded by the microcode vendor or not contain anything important enough to warrant an update.
Click to expand...
[Field descriptions]
  • For Intel & AMD, only the latest microcodes of each CPUID are included in the repositories.
Click to expand...

Further more:

(M)WAIT for It: Bridging the Gap between Microarchitectural and Architectural Side Channels
 
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