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x86 microcode update support

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arch/x86/kernel/cpu/microcode/*
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Borislav Petkov
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  1. x86/microcode: Refactor NMI-based rendezvous mechanism to stop-machine PATCH v4 9 patches Chang S. Bae lkml arch/ (6), include/, kernel/ In review 6 replies
  2. x86/microcode: Refactor NMI-based rendezvous mechanism to stop-machine PATCH v3 9 patches Chang S. Bae lkml oe-kbuild-all arch/ (6), include/, kernel/ Superseded 6 replies
  3. cpu/hotplug: Remove cpu_down() global stop_machine() except for CPUHP_TEARDOWN_CPU itself PATCH v2 47 patches Frederic Weisbecker linux-arm-kernel linux-arm-msm linux-csky +11 arch/ (16), kernel/ (4), include/ In review 2 replies
  4. cpu/hotplug: Remove cpu_down() global stop_machine() except for CPUHP_TEARDOWN_CPU itself RFC PATCH 49 patches Frederic Weisbecker linux-arm-kernel linux-arm-msm linux-csky +11 arch/ (16), kernel/ (6), include/ (2) Superseded 2 replies
  5. x86/msr: Drop 32-bit interfaces of native MSR functions PATCH v3 5 patches Juergen Gross lkml arch/ (7) In review 2 replies
  6. x86/msr: Drop 32-bit MSR interfaces PATCH v5 12 patches Juergen Gross dri-devel kvm linux-acpi +16 arch/ (101), drivers/ (38), include/ New 0 replies
  7. x86/microcode: Address GNR errata and follow-up PATCH 8 patches Chang S. Bae lkml stable arch/x86/kernel/cpu/microcode/ (4), Documentation/admin-guide/, arch/x86/ Superseded 21 replies
  8. x86/msr: Drop 32-bit MSR interfaces PATCH v4 13 patches Juergen Gross dri-devel kvm linux-acpi +16 arch/ (100), drivers/ (37), include/ Superseded 2 replies
  9. x86/microcode: Refactor NMI-based rendezvous mechanism to stop-machine PATCH v2 11 patches Chang S. Bae lkml arch/ (6), include/, kernel/ Superseded 7 replies
  10. x86/msr: Drop 32-bit MSR interfaces PATCH v2 13 patches Juergen Gross dri-devel kvm linux-acpi +16 arch/ (99), drivers/ (37), include/ Superseded 15 replies
  11. x86/microcode: Enable uniform feature RFC PATCH 8 patches Chang S. Bae lkml arch/ (10), include/, kernel/ In review 6 replies
  12. x86/microcode/intel: Refresh old_microcode defines with the May 2026 release PATCH v2 1 patch Sohil Mehta lkml arch/x86/kernel/cpu/microcode/intel-ucode-defs.h Applied 3 replies
  13. x86/microcode/intel: Refresh old_microcode defines with the May 2026 release PATCH 1 patch Sohil Mehta lkml arch/x86/kernel/cpu/microcode/intel-ucode-defs.h Superseded 1 reply
  14. x86/msr: Drop 32-bit MSR interfaces PATCH v3 13 patches Juergen Gross dri-devel kvm linux-acpi +16 arch/ (100), drivers/ (37), include/ Superseded 8 replies
  15. Add support for Hygon family 18h models 4h-8h PATCH v5 5 patches Fu Hao linux-perf-users lkml arch/ (9) In review 2 replies
  16. x86/msr: Drop 32-bit interfaces of native MSR functions PATCH v2 5 patches Juergen Gross lkml arch/ (7) Superseded 1 reply
  17. x86: Introduce a centralized CPUID data model PATCH v7 120 patches Ahmed S. Darwish lkml x86-cpuid arch/ (87), drivers/ (21), MAINTAINERS, sound/, +1 Applied 72 replies
  18. Add support for Hygon family 18h models 4h-8h PATCH v4 5 patches Fu Hao linux-perf-users lkml arch/ (9) Superseded 2 replies
  19. x86/microcode/intel: Panic on partial microcode update PATCH 1 patch Chang S. Bae lkml arch/x86/include/asm/, arch/x86/kernel/cpu/microcode/ Superseded 19 replies
  20. x86/microcode: Remove stray double quotes in copyright entries PATCH 1 patch Thorsten Blum lkml arch/x86/kernel/cpu/microcode/ (2) New 0 replies
  21. x86/cpu: Remove unnecessary __maybe_unused annotations PATCH 1 patch Thorsten Blum lkml arch/x86/kernel/cpu/ (2), arch/x86/kernel/cpu/microcode/ Applied 0 replies
  22. x86/msr: Drop 32-bit MSR interfaces PATCH 32 patches Juergen Gross dri-devel kvm linux-acpi +17 arch/ (102), drivers/ (43), include/ Applied 55 replies
  23. x86/msr: Drop 32-bit interfaces of native MSR functions PATCH 5 patches Juergen Gross lkml arch/x86/kernel/cpu/microcode/ (3), arch/x86/include/asm/ (2), arch/x86/coco/sev/, arch/x86/kernel/cpu/resctrl/ Superseded 2 replies
  24. Add support for Hygon family 18h models 4h-8h PATCH v3 7 patches Fu Hao linux-pci linux-perf-users linux-sound +1 arch/ (9), sound/ (3) Applied 12 replies
  25. x86/msr: Drop 32-bit variants of *_on_cpu() MSR functions PATCH 8 patches Juergen Gross linux-acpi linux-edac linux-hwmon +4 drivers/ (15), arch/ (12) Superseded 18 replies
  26. Add support for Hygon Family 18h model 4h~8h processors PATCH 8 patches Fu Hao linux-iommu linux-pci linux-perf-users +2 arch/ (8), sound/ (3), include/ (2), drivers/ Superseded 10 replies
  27. Add support for Hygon Family 18h model 4h~8h processors PATCH v2 8 patches Fu Hao linux-iommu linux-pci linux-perf-users +2 arch/ (9), sound/ (3), drivers/, include/ Applied 13 replies
  28. x86/microcode/AMD: Move the no-revision fixup to get_patch_level() PATCH 1 patch Borislav Petkov lkml arch/x86/kernel/cpu/microcode/amd.c New 0 replies
  29. x86/cpu: Skip reading MSR_IA32_PLATFORM_ID in virtualized environment PATCH v2 1 patch Binbin Wu kvm lkml arch/x86/kernel/cpu/microcode/ (4), arch/x86/include/asm/ (2), arch/x86/kernel/cpu/ In review 16 replies
  30. x86: Introduce a centralized CPUID data model PATCH v6 90 patches Ahmed S. Darwish lkml llvm oe-kbuild-all +1 arch/ (81), drivers/ (18), sound/ (2), MAINTAINERS, +1 Applied 51 replies
  31. x86/microcode: Fix comment in microcode_loader_disabled() PATCH 1 patch Xiaoyao Li lkml arch/x86/kernel/cpu/microcode/core.c Applied 1 reply
  32. Fix MSR_IA32_PLATFORM_ID access for TDX guests PATCH 2 patches Binbin Wu kvm lkml arch/x86/kernel/cpu/microcode/ (3), arch/x86/kvm/vmx/ In review 13 replies
  33. x86/intel: Update the old microcode list with a script PATCH v5 2 patches Sohil Mehta lkml MAINTAINERS, arch/x86/kernel/cpu/microcode/, scripts/ Applied 0 replies
  34. x86/msr: Reduce MSR access interfaces RFC PATCH 11 patches Juergen Gross linux-acpi linux-edac linux-hwmon +5 arch/ (22), drivers/ (15) New 0 replies
  35. x86: Introduce a centralized CPUID data model PATCH v5 35 patches Ahmed S. Darwish linux-sound lkml x86-cpuid arch/ (67), drivers/ (18), MAINTAINERS, sound/ Superseded 15 replies
  36. x86/microcode/amd: update outdated comment PATCH 1 patch kexinsun lkml arch/x86/kernel/cpu/microcode/amd.c In review 1 reply
  37. x86/cpu: Take Intel platform into account for old microcode checks PATCH v4 4 patches Dave Hansen lkml arch/x86/include/asm/ (2), arch/x86/kernel/cpu/ (2), arch/x86/kernel/cpu/microcode/ (2), include/linux/ Applied 8 replies
  38. x86/microcode: Refactor NMI-based rendezvous mechanism to stop-machine PATCH 7 patches Chang S. Bae lkml oe-kbuild-all arch/ (4), include/, kernel/ Superseded 19 replies
  39. x86/cpu: Take Intel platform into account for old microcode checks PATCH v3 4 patches Dave Hansen lkml arch/x86/include/asm/ (2), arch/x86/kernel/cpu/ (2), arch/x86/kernel/cpu/microcode/ (2), include/linux/ Superseded 0 replies
  40. x86/cpu: Take Intel platform into account for old microcode checks PATCH v2 6 patches Dave Hansen lkml arch/ (9), include/ (3) Superseded 22 replies
  41. x86/cpu: Take Intel platform into account for old microcode checks PATCH 6 patches Dave Hansen lkml llvm oe-kbuild-all arch/x86/include/asm/ (5), arch/x86/kernel/cpu/ (3), arch/x86/kernel/cpu/microcode/ (2), include/linux/ Superseded 28 replies
  42. x86/microcode/AMD: Allow loader debugging to be enabled on baremetal too PATCH 1 patch Borislav Petkov lkml arch/x86/kernel/cpu/microcode/ (3), arch/x86/ Applied 0 replies
  43. x86/microcode/AMD: Fix Entrysign revision check for Zen5/Strix Halo PATCH 1 patch Rong Zhang lkml arch/x86/kernel/cpu/microcode/amd.c Applied 1 reply
  44. x86/intel: Refresh the old ucode revisions with a script PATCH 2 patches Sohil Mehta lkml MAINTAINERS, arch/x86/kernel/cpu/microcode/, scripts/ In review 19 replies
  45. x86/microcode/AMD: Read from MSR_AMD64_PATCH_LEVEL to get base_rev if not defined PATCH tip 1 patch Waiman Long lkml arch/x86/kernel/cpu/microcode/amd.c In review 4 replies
  46. x86/CPU/AMD: Add additional fixed microcode for SB-7055 PATCH 1 patch Mario Limonciello linux-patches lkml arch/x86/kernel/cpu/amd.c Applied 1 reply
  47. syscore: Pass context data to callbacks PATCH v3 7 patches Thierry Reding linux-acpi linux-arm-kernel linux-mips +6 drivers/ (60), arch/ (41), kernel/ (6), include/, +1 In review 10 replies
  48. x86/microcode/AMD: Add more known models to entry sign checking PATCH 1 patch Mario Limonciello (AMD) linux-patches lkml arch/x86/kernel/cpu/microcode/amd.c Applied 0 replies
  49. x86/microcode/AMD: Select which microcode patch to load PATCH 1 patch Borislav Petkov lkml arch/x86/kernel/cpu/microcode/amd.c Applied 0 replies
  50. arch/x86/microcode: Mark early_parse_cmdline() as __init PATCH v2 1 patch Yu Peng lkml arch/x86/kernel/cpu/microcode/core.c Superseded 3 replies
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