Merge tag 'x86_microcode_for_v6.18_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 microcode loading updates from Borislav Petkov:

 - Add infrastructure to be able to debug the microcode loader in a guest

 - Refresh Intel old microcode revisions

* tag 'x86_microcode_for_v6.18_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/microcode: Add microcode loader debugging functionality
  x86/microcode: Add microcode= cmdline parsing
  x86/microcode/intel: Refresh the revisions that determine old_microcode