[PATCH v2 0/5] ARM: Remaining PREEMPT_RT bits

[Sebastian Andrzej Siewior]

this is the last batch I have to enable PREEMPT_RT on the ARM
architecture.
Last time I posted them there was some discussion about making the
branch predictor hardening worse. I redid it hoping it improved now and
does not make it worse.

v1…v2: https://lore.kernel.org/all/20251029155918.503060-1-bigeasy@linutronix.de
  - Allow to enable jump-labels on UP. The UP build does not involve
    stop_machine(). Reworked by Arnd.

  - Instead of forbidding HAVE_GUP_FAST with HIGHPTE enabled just
    disable HIGHPTE on PREEMPT_RT. As Arnd explained, HIGHPTE is rarely
    needed.

  - Don't let ARCH_SUPPORTS_RT depend on HAVE_POSIX_CPU_TIMERS_TASK_WORK
    which in turn depends on !KVM. Since KVM has been removed from ARM
    it is sufficient to unconditionally allow ARCH_SUPPORTS_RT. Noted
    by Arnd.

Sebastian Andrzej Siewior (3):
  ARM: mm: fault: Move harden_branch_predictor() before interrupts are
    enabled
  ARM: Disable HIGHPTE on PREEMPT_RT kernels
  ARM: Allow to enable RT

Thomas Gleixner (1):
  ARM: Disable jump-label on PREEMPT_RT

Yadi.hu (1):
  ARM: mm: fault: Enable interrupts before invoking __do_user_fault()

 arch/arm/Kconfig    |  5 +++--
 arch/arm/mm/fault.c | 16 ++++++++++------
 2 files changed, 13 insertions(+), 8 deletions(-)

-- 
2.51.0