I am not sure i should post this here since it's about BLFS
Chapter 3. After LFS Configuration Issues / About Firmware
On a 64bit kernel we don't need to go down the initrd method for early
microcode update. We only need to add the microcode file to the
CONFIG_EXTRA_FIRMWARE variable. This will insert the microcode file
into the kernel image and the kernel during boot will do the rest.
Device Drivers --->
Generic Driver Options --->
-*- Userspace firmware loading support
(intel-ucode/06-3a-09) External firmware blobs to build into
the kernel binary
(/lib/firmware) Firmware blobs root directory
06-3a-09 is the microcode file for my intel i5-3570 in this case.
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