Merge tag 'x86-urgent-2026-05-31' of git://git.kernel.org/pub/scm/linux/kernel/git...

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

Pull x86 fixes from Ingo Molnar:

 - 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)

* tag 'x86-urgent-2026-05-31' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  Revert "x86/fpu: Refine and simplify the magic number check during signal return"
  x86/kvm/vmx: Fix x86_64 CFI build
  x86/ftrace: Relocate %rip-relative percpu refs in dynamic trampolines
  x86/microcode: Do not access MSR_IA32_PLATFORM_ID when running as a guest
  Documentation/arch/x86: Hide clearcpuid=