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 Qemu

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>

show more ...

util/error: make func optional

The function name is not available in Rust, so make it optional.

Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

util/error: allow non-NUL-terminated err->src

Rust makes the current file available as a statically-allocated string,
but without a NUL terminator. Allow this by storing an optional maximum
length

util/error: allow non-NUL-terminated err->src

Rust makes the current file available as a statically-allocated string,
but without a NUL terminator. Allow this by storing an optional maximum
length in the Error.

Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

show more ...

util/error: expose Error definition to Rust code

This is used to preserve the file and line in a roundtrip from
C Error to Rust and back to C.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>