no microcode early update?

[stevepusser]

Does dmesg report stuff from the initrd boot, or does it have to wait until the main system starts?

[Head_on_a_Stick]

^ Good question and I'm not sure.

Anyway the actual µcode version can be viewed with:

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grep microcode /proc/cpuinfo

I tried updating it manually by downloading the files from Intel, placing them in /lib/firmware/intel-ucode and then running:

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# echo 1 > /sys/devices/system/cpu/microcode/reload

But the version stayed the same so I presume that my method works.

All we have in dmesg is

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alpine:~$ sudo dmesg|grep microcode
[    0.533318] microcode: sig=0x20655, pf=0x10, revision=0x4
[    0.533490] microcode: Microcode Update Driver: v2.2.

I have also discovered that for Debian the µcode is baked into the initramfs image, for more see

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zcat /usr/share/doc/intel-microcode/README.Debian.gz