Commit 6cb094583aef for kernel

commit 6cb094583aef6533d0fd47ae7d134718da3399da
Merge: 92b71befc349 e8f45927ee5d
Author: Linus Torvalds <torvalds@linux-foundation.org>
Date:   Wed Apr 2 11:33:20 2025 -0700

    Merge tag 'x86_tdx_for_6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

    Pull x86 TDX updates from Dave Hansen:
     "Avoid direct HLT instruction execution in TDX guests.

      TDX guests aren't expected to use the HLT instruction directly. It
      causes a virtualization exception (#VE). While the #VE _can_ be
      handled, the current handling is slow and buggy and the easiest thing
      is just to avoid HLT in the first place. Plus, the kernel already has
      paravirt infrastructure that makes it relatively painless.

      Make TDX guests require paravirt and add some TDX-specific paravirt
      handlers which avoid HLT in the normal halt routines. Also add a
      warning in case another HLT sneaks in.

      There was a report that this leads to a "major performance
      improvement" on specjbb2015, probably because of the extra #VE
      overhead or missed wakeups from the buggy HLT handling"

    * tag 'x86_tdx_for_6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
      x86/tdx: Emit warning if IRQs are enabled during HLT #VE handling
      x86/tdx: Fix arch_safe_halt() execution for TDX VMs
      x86/paravirt: Move halt paravirt calls under CONFIG_PARAVIRT