Merge tag 'for-upstream' of https://gitlab.com/bonzini/qemu into staging

* futex: support Windows
* qemu-thread: Avoid futex abstraction for non-Linux
* migration, hw/display/apple-gfx: replace QemuSemaphore with QemuEvent
* rust: bindings for Error
* hpet, rust/hpet: return errors from realize if properties are incorrect
* rust/hpet: Drop BqlCell wrapper for num_timers
* target/i386: Emulate ftz and denormal flag bits correctly
* i386/kvm: Prefault memory on page state change

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* tag 'for-upstream' of https://gitlab.com/bonzini/qemu: (31 commits)
  tests/tcg/x86_64/fma: add test for exact-denormal output
  target/i386: Wire up MXCSR.DE and FPUS.DE correctly
  target/i386: Use correct type for get_float_exception_flags() values
  target/i386: Detect flush-to-zero after rounding
  hw/display/apple-gfx: Replace QemuSemaphore with QemuEvent
  migration/postcopy: Replace QemuSemaphore with QemuEvent
  migration/colo: Replace QemuSemaphore with QemuEvent
  migration: Replace QemuSemaphore with QemuEvent
  qemu-thread: Document QemuEvent
  qemu-thread: Use futex if available for QemuLockCnt
  qemu-thread: Use futex for QemuEvent on Windows
  qemu-thread: Avoid futex abstraction for non-Linux
  qemu-thread: Replace __linux__ with CONFIG_LINUX
  futex: Support Windows
  futex: Check value after qemu_futex_wait()
  i386/kvm: Prefault memory on page state change
  rust: make TryFrom macro more resilient
  docs: update Rust module status
  rust/hpet: Drop BqlCell wrapper for num_timers
  rust/hpet: return errors from realize if properties are incorrect
  ...

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>