[GIT PULL] x86 fixes

[Ingo Molnar]

Linus,

Please pull the latest x86/urgent Git tree from:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86-urgent-2026-05-31

for you to fetch changes up to 44eeff9bc467bc7d1fec34fc3f6001f385fe462c:

Miscellaneous x86 fixes:

 - Make the clearcpuid= boot parameter less prominent
   and warn about its dangers & caveats (Borislav Petkov)

 - Do not access the (new) PLATFORM_ID MSR when running as a guest
   (Borislav Petkov)

 - x86 ftrace: Relocate %rip-relative percpu refs in dynamic
   trampolines, to fix crash when using such trampolines
   (Alexis Lothoré)

 - Fix x86-64 CFI build error (Peter Zijlstra)

 - Revert FPU signal return magic number check optimization, because
   it broke CRIU and gVisor in certain FPU configurations
   (Andrei Vagin)

 Thanks,

	Ingo

------------------>
Alexis Lothoré (eBPF Foundation) (1):
      x86/ftrace: Relocate %rip-relative percpu refs in dynamic trampolines

Andrei Vagin (1):
      Revert "x86/fpu: Refine and simplify the magic number check during signal return"

Borislav Petkov (1):
      x86/microcode: Do not access MSR_IA32_PLATFORM_ID when running as a guest

Borislav Petkov (AMD) (1):
      Documentation/arch/x86: Hide clearcpuid=

Peter Zijlstra (1):
      x86/kvm/vmx: Fix x86_64 CFI build


 Documentation/admin-guide/kernel-parameters.txt | 18 ------------------
 Documentation/arch/x86/cpuinfo.rst              |  4 ++++
 arch/x86/entry/common.c                         |  2 +-
 arch/x86/entry/entry.S                          |  2 ++
 arch/x86/include/asm/processor.h                |  1 +
 arch/x86/kernel/cpu/microcode/amd.c             |  4 ++--
 arch/x86/kernel/cpu/microcode/core.c            | 22 ++++++++++------------
 arch/x86/kernel/cpu/microcode/intel.c           |  3 +++
 arch/x86/kernel/cpu/microcode/internal.h        |  1 -
 arch/x86/kernel/fpu/signal.c                    | 11 ++++++++---
 arch/x86/kernel/ftrace.c                        |  7 +++++++
 arch/x86/kernel/idt.c                           | 12 ++----------
 12 files changed, 40 insertions(+), 47 deletions(-)