[PATCH v4 0/9] x86/microcode: Refactor NMI-based rendezvous mechanism to stop-machine

[Chang S. Bae]

Hi all,

This revision has a couple of minor changes on top of 7.4-rc1:

 * Remove the fallback prototype (patch3)
 * Add a comment at the stop-machine's NMI handler call site (patch5)

V3 previously included several changes addressing Sashiko's feedback. For
the background and overall design, please refer to the more detailed V2
cover [*].

I'll first wait to see whether there is any further feedback from
Sashiko. Otherwise, I think this series is getting close to being ready.

The series is also available in this repository:
 git://github.com/intel-staging/microcode.git nmi-stop-machine_v4

Thanks,
Chang

[*] https://lore.kernel.org/20260331014251.86353-12-chang.seok.bae@xxxxxxxxx

Chang S. Bae (7):
  stop_machine: Refactor multi-CPU stop glue code
  stop_machine: Add NMI-based execution path
  stop_machine: Introduce stop_machine_nmi_cpuslocked()
  x86/microcode: Distinguish NMI control path on stop-machine callback
  x86/microcode: Use stop-machine NMI facility
  x86/nmi: Simplify offline microcode handler invocation
  x86/microcode: Remove microcode_nmi_handler_enable

David Kaplan (2):
  x86/apic: Implement self-NMI support
  x86/nmi: Support NMI stop-machine handler

 arch/Kconfig                         |   3 +
 arch/x86/Kconfig                     |   1 +
 arch/x86/include/asm/microcode.h     |  11 --
 arch/x86/kernel/apic/ipi.c           |  10 ++
 arch/x86/kernel/cpu/microcode/core.c |  35 ++----
 arch/x86/kernel/nmi.c                |  12 +-
 include/linux/stop_machine.h         |  38 ++++++
 kernel/stop_machine.c                | 180 ++++++++++++++++++++++++---
 8 files changed, 232 insertions(+), 58 deletions(-)


base-commit: 6628e7d4c6b25c8d18f1345e3a20d21829aae7e4
-- 
2.53.0