Merge tag 'x86-cpu-2026-06-14' of gitolite.kernel.org:pub/scm/linux/kernel/git/tip/tip

Pull x86 cpuid updates from Ingo Molnar:

 - CPUID API updates (Ahmed S. Darwish):
    - Introduce a centralized CPUID parser
    - Introduce a centralized CPUID data model
    - Introduce <asm/cpuid/leaf_types.h>
    - Rename cpuid_leaf()/cpuid_subleaf() APIs
    - treewide: Explicitly include the x86 CPUID headers

 - Update to x86-cpuid-db v3.1 (Maciej Wieczor-Retman)

 - Continued removal of pre-i586 support and related simplifications
   (Ingo Molnar)

 - Add Intel CPU model number for rugged Panther Lake (Tony Luck)

 - Misc fixes, updates and cleanups by Arnd Bergmann, Chao Gao, Lukas
   Bulwahn, Sohil Mehta, Maciej Wieczor-Retman.

* tag 'x86-cpu-2026-06-14' of gitolite.kernel.org:pub/scm/linux/kernel/git/tip/tip: (25 commits)
  x86/cpu: Make CONFIG_X86_CX8 unconditional
  x86/cpu: Remove unused !CONFIG_X86_TSC code
  x86/cpuid: Update bitfields to x86-cpuid-db v3.1
  tools/x86/kcpuid: Update bitfields to x86-cpuid-db v3.1
  x86/cpu: Make CONFIG_X86_TSC unconditional
  MAINTAINERS: Drop obsolete FPU EMULATOR section
  x86/cpu: Fix a F00F bug warning and clean up surrounding code
  x86/cpu: Add Intel CPU model number for rugged Panther Lake
  x86/cpuid: Introduce a centralized CPUID parser
  x86/cpu: Introduce a centralized CPUID data model
  x86/cpuid: Introduce <asm/cpuid/leaf_types.h>
  x86/cpuid: Rename cpuid_leaf()/cpuid_subleaf() APIs
  x86/cpu: Do not include the CPUID API header in asm/processor.h
  Documentation: core-api/cpu_hotplug: Remove stale cpu0_hotplug docs
  x86/cpu, cpufreq: Remove AMD ELAN support
  x86/fpu: Remove the math-emu/ FPU emulation library
  x86/fpu: Remove the 'no387' boot option
  x86/fpu: Remove MATH_EMULATION and related glue code
  treewide: Explicitly include the x86 CPUID headers
  x86/cpu: Remove the CONFIG_X86_INVD_BUG quirk
  ...

diff --cc Documentation/admin-guide/kernel-parameters.txt
Simple merge

diff --cc MAINTAINERS
Simple merge

diff --cc arch/x86/Kconfig
index 8af8e9070ce477fd316d3f9d248195fe747e8b94,bd548dc1df5c184bcce4dffd0fb53744cf7b7860..fa4f0079614cd0910c0dbfc1ef54d157d822ec78
--- 1/arch/x86/Kconfig
--- 2/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@@ -131,8 -130,10 +131,8 @@@ config X8
        select ARCH_SUPPORTS_LTO_CLANG
        select ARCH_SUPPORTS_LTO_CLANG_THIN
        select ARCH_SUPPORTS_RT
 -      select ARCH_SUPPORTS_AUTOFDO_CLANG
 -      select ARCH_SUPPORTS_PROPELLER_CLANG    if X86_64
        select ARCH_USE_BUILTIN_BSWAP
-       select ARCH_USE_CMPXCHG_LOCKREF         if X86_CX8
+       select ARCH_USE_CMPXCHG_LOCKREF
        select ARCH_USE_MEMTEST
        select ARCH_USE_QUEUED_RWLOCKS
        select ARCH_USE_QUEUED_SPINLOCKS

diff --cc arch/x86/Makefile
Simple merge

diff --cc arch/x86/events/amd/core.c
Simple merge

diff --cc arch/x86/events/amd/ibs.c
Simple merge

diff --cc arch/x86/events/amd/uncore.c
Simple merge

diff --cc arch/x86/events/intel/core.c
Simple merge

diff --cc arch/x86/events/zhaoxin/core.c
Simple merge

diff --cc arch/x86/include/asm/processor.h
Simple merge

diff --cc arch/x86/include/asm/xen/hypervisor.h
Simple merge

diff --cc arch/x86/kernel/apic/apic.c
Simple merge

diff --cc arch/x86/kernel/cpu/amd.c
Simple merge

diff --cc arch/x86/kernel/cpu/mce/core.c
Simple merge

diff --cc arch/x86/kernel/cpu/mce/inject.c
Simple merge

diff --cc arch/x86/kernel/cpu/microcode/amd.c
Simple merge

diff --cc arch/x86/kernel/cpu/microcode/core.c
Simple merge

diff --cc arch/x86/kernel/cpu/microcode/intel.c
Simple merge

diff --cc arch/x86/kernel/cpu/mshyperv.c
Simple merge

diff --cc arch/x86/kernel/cpu/resctrl/monitor.c
Simple merge

diff --cc arch/x86/kernel/kvm.c
Simple merge

diff --cc arch/x86/kernel/paravirt.c
Simple merge

diff --cc arch/x86/kvm/mmu/mmu.c
Simple merge

diff --cc arch/x86/kvm/svm/sev.c
Simple merge

diff --cc arch/x86/kvm/svm/svm.c
Simple merge

diff --cc arch/x86/kvm/vmx/vmx.c
Simple merge

diff --cc arch/x86/xen/Kconfig
Simple merge

diff --cc arch/x86/xen/enlighten_hvm.c
Simple merge

diff --cc arch/x86/xen/enlighten_pv.c
Simple merge

diff --cc drivers/cpufreq/Kconfig.x86
Simple merge

diff --cc drivers/thermal/intel/x86_pkg_temp_thermal.c
Simple merge