git: pc64: Support to apply AMD microcode update

[Aaron LI]

commit faa42c5d74ba2a316e2b77ee5dff23b869301e69
Author: LI Leding <lileding at gmail.com>
Date:   Thu Oct 1 11:00:57 2026 +0800

    pc64: Support to apply AMD microcode update
    
    * Implement ucode_load_bsp() that runs in hammer_time() immediately
      before identify_cpu(), so the microcode update that's preloaded by the
      boot loader can be applied before kernel detecting the CPU features.
      The companion ucode_apply() function is called from initializecpu() on
      each AP to picks up the microcode update.
    
      Note: Only AMD CPUs are supported now.
    
    * Add "cpu_microcode_load" and "cpu_microcode_name" variables to
      loader.conf to load the CPU microcode and document them.
    
    Co-authored-by: Aaron LI <aly at aaronly.me>
    GitHub-PR: https://github.com/DragonFlyBSD/DragonFlyBSD/pull/55

Summary of changes:
 share/man/man5/loader.conf.5         |  27 ++++
 stand/boot/dloader/loader-bootp.conf |   8 +
 stand/boot/dloader/loader.conf       |   8 +
 sys/platform/pc64/conf/files         |   1 +
 sys/platform/pc64/include/ucode.h    |  43 +++++
 sys/platform/pc64/x86_64/initcpu.c   |   3 +
 sys/platform/pc64/x86_64/machdep.c   |   2 +
 sys/platform/pc64/x86_64/ucode.c     | 294 +++++++++++++++++++++++++++++++++++
 8 files changed, 386 insertions(+)
 create mode 100644 sys/platform/pc64/include/ucode.h
 create mode 100644 sys/platform/pc64/x86_64/ucode.c

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/faa42c5d74ba2a316e2b77ee5dff23b869301e69


-- 
DragonFly BSD source repository