[Testing / Need help] Unraid CPU Microcode Update

[p0p]

Hey, I'm trying to get CPU Microcode Updates working on Unraid. Reason is security, features, perfomance and stability.

So far:

• Checked my current Microcode Version using

  dmesg | grep microcode

   and copied the result to my notepad.
• Installed `un-get` from @ich777 (Grüße) using the CC from here `https://raw.githubusercontent.com/ich777/un-get/master/un-get.plg` (🔗Github)
• installed the package `intel-microcode` by using a root user

  un-get install intel-microcode

  `(🔗Package Source with infos)
• added these line using `nano /etc/rc.conf` as it was recommended online

  microcode_update_enable="YES"
  cpu_microcode_load="YES"
  cpu_microcode_name="/boot/intel-ucode.cpio"

• Changed my syslinux configuration for the boot entry "UnraidOS" to (Main > Flash > Syslinux Configuration)

  kernel /bzimage
  append initrd=/intel-ucode.cpio,/bzroot

  
  to load the microcode loader(?)
• reboot
• Checked with

  dmesg | grep microcode

   plus

  dmesg | grep -i microcode

  aaaand for my understanding, looks like a success!
  Microcode Version for my intel 7400t was from 2023-03-29 and is now 2023-09-28.

 

Here's the part I need help with please:

1. The installer tells me that 

   /bin/bash: line 1: /sys/devices/system/cpu/microcode/reload: Permission denied

   Why?

   grep CONFIG_MICROCODE /usr/src/linux-*/.config

   • outputs

     CONFIG_MICROCODE=y
     CONFIG_MICROCODE_INTEL=y
     CONFIG_MICROCODE_AMD=y
     # CONFIG_MICROCODE_LATE_LOADING is not set

     
     so it seems to be okay-ish for my newb understanding. 
     What does the the permission denied mean in detail? How can we avoid this?
2. Because the documentation of the intel-microcode package just tell us to use the syslinux config (🔗Source), are the changes to the `rc.conf` still needed? To keep in mind: Unraid is Slackware based.
3. Are the changes to the microcode persistent or if I remove the package should I be reverted to the ones that were shipped with the UEFI/CPU?

 

Thanks! 🙂

p0p

 

Edited Friday at 05:05 PM by p0p
added code fields. forgot that unraid forum doesn't support markdown.