miyuriの日記： IntelなCPUのucode updateの方法

https://software.intel.com/en-us/articles/intel-sdm
Volume 3A:
System Programming Guide, Part 1
CHAPTER 9 PROCESSOR MANAGEMENT AND INITIALIZATION
9.11 MICROCODE UPDATE FACILITIES

日本語だと、この辺り。
https://www.intel.co.jp/content/dam/www/public/ijkk/jp/ja/documents/developer/IA32_Arh_Dev_Man_Vol3_i.pdf