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Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Link: https://lore.kernel.org/r/20250827104147.717203-7-marcandre.lureau@redhat.com
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Guess the name of the subdir from the manifest directory, instead of
hard-coding it. In the following commits, other crates can then link to
this file, instead of maintaining their own copy.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Link: https://lore.kernel.org/r/20250827104147.717203-5-marcandre.lureau@redhat.com
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Link: https://lore.kernel.org/r/20250827104147.717203-6-marcandre.lureau@redhat.com
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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This will allow to split vmstate to a standalone crate next.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Link: https://lore.kernel.org/r/20250827104147.717203-10-marcandre.lureau@redhat.com
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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This will allow to split vmstate to a standalone crate next.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Link: https://lore.kernel.org/r/20250827104147.717203-9-marcandre.lureau@redhat.com
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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This will allow to split vmstate to a standalone crate next.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Link: https://lore.kernel.org/r/20250827104147.717203-8-marcandre.lureau@redhat.com
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Link: https://lore.kernel.org/r/20250827104147.717203-4-marcandre.lureau@redhat.com
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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The global allocator has always been disabled. There is no clear reason
Rust and C should use the same allocator. Allocations made from Rust
must be freed by Rust, and same for C, otherwise we head into troubles.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Link: https://lore.kernel.org/r/20250827104147.717203-3-marcandre.lureau@redhat.com
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Link: https://lore.kernel.org/r/20250827104147.717203-2-marcandre.lureau@redhat.com
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Now that const_refs_static can be assumed, convert the members of
the DeviceImpl trait from functions to constants. This lets the
compiler know that they have a 'static lifetime, and removes the
need for the weird "Box::leak()".
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Link: https://lore.kernel.org/r/20250908105005.2119297-10-pbonzini@redhat.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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The VMStateDescriptionBuilder already needs const_refs_static, so
use it to remove the need for vmstate_clock! and vmstate_struct!,
as well as to simplify the implementation for scalars.
If the consts in the VMState trait can reference to static
VMStateDescription, scalars do not need the info_enum_to_ref!
indirection and structs can implement the VMState trait themselves.
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Link: https://lore.kernel.org/r/20250908105005.2119297-9-pbonzini@redhat.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Similar to MemoryRegionOps, the builder pattern has two advantages:
1) it makes it possible to build a VMStateDescription that knows which
types it will be invoked on; 2) it provides a way to wrap the callbacks
and let devices avoid "unsafe".
Unfortunately, building a static VMStateDescription requires the
builder methods to be "const", and because the VMStateFields are
*also* static, this requires const_refs_static. So this requires
Rust 1.83.0.
Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
Link: https://lore.kernel.org/r/20250908105005.2119297-8-pbonzini@redhat.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Add derive macro for declaring qdev properties directly above the field
definitions. To do this, we split DeviceImpl::properties method on a
separate trait so we can implement only that part in the derive macro
expansion (we cannot partially implement the DeviceImpl trait).
Adding a `property` attribute above the field declaration will generate
a `qemu_api::bindings::Property` array member in the device's property
list.
Signed-off-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Link: https://lore.kernel.org/r/20250711-rust-qdev-properties-v3-1-e198624416fb@linaro.org
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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They were stabilized in Rust 1.79.0.
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Link: https://lore.kernel.org/r/20250908105005.2119297-6-pbonzini@redhat.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Rust 1.83 allows more functions to be marked const.
Fix clippy with bumped minimum supported Rust version.
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Link: https://lore.kernel.org/r/20250908105005.2119297-5-pbonzini@redhat.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Link: https://lore.kernel.org/r/20250908105005.2119297-4-pbonzini@redhat.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Meson 1.9.0 provides mixed linking of Rust and C objects. As a side effect,
this also allows adding dependencies with "sources: ..." files to Rust crates
that use structured_sources().
It can also clean up up the meson.build files for Rust noticeably, but due
to an issue with doctests (see https://github.com/mesonbuild/meson/pull/14973)
that will have to wait for 1.9.1.
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Link: https://lore.kernel.org/r/20250908105005.2119297-3-pbonzini@redhat.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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This is for the purpose of getting an easy-to-use base for future
development. The plan is:
- that Debian will require trixie to enable Rust usage
- that Ubuntu will backport 1.83 to its 22.04 and 24.04 versions
(https://bugs.launchpad.net/ubuntu/+source/rustc-1.83/+bug/2120318)
Marc-André is working on adding Rust to other CI jobs.
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Link: https://lore.kernel.org/r/20250908105005.2119297-2-pbonzini@redhat.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Whenever user-mode emulation needs to go all the way out of the cpu
exec loop, it uses cpu_exit(), which already sets cpu->exit_request.
Therefore, there is no need for tcg_kick_vcpu_thread() to set
cpu->exit_request again outside system emulation.
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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There is no reason for some accelerators to use qemu_process_cpu_events_common
(which is separated from qemu_process_cpu_events() specifically for round
robin TCG). They can also check for events directly on the first pass through
the loop, instead of setting cpu->exit_request to true.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Make the code common to all accelerators: after seeing cpu->exit_request
set to true, accelerator code needs to reach qemu_process_cpu_events_common().
So for the common cases where they use qemu_process_cpu_events(), go ahead and
clear it in there. Note that the cheap qatomic_set() is enough because
at this point the thread has taken the BQL; qatomic_set_mb() is not needed.
In particular, this is the ordering of the communication between
I/O and vCPU threads is always the same.
In the I/O thread:
(a) store other memory locations that will be checked if cpu->exit_request
or cpu->interrupt_request is 1 (for example cpu->stop or cpu->work_list
for cpu->exit_request)
(b) cpu_exit(): store-release cpu->exit_request, or
(b) cpu_interrupt(): store-release cpu->interrupt_request
>>> at this point, cpu->halt_cond is broadcast and the BQL released
(c) do the accelerator-specific kick (e.g. write icount_decr for TCG,
pthread_kill for KVM, etc.)
In the vCPU thread instead the opposite order is respected:
(c) the accelerator's execution loop exits thanks to the kick
(b) then the inner execution loop checks cpu->interrupt_request
and cpu->exit_request. If needed cpu->interrupt_request is
converted into cpu->exit_request when work is needed outside
the execution loop.
(a) then the other memory locations are checked. Some may need to
be read under the BQL, but the vCPU thread may also take other
locks (e.g. for queued work items) or none at all.
qatomic_set_mb() would only be needed if the halt sleep was done
outside the BQL (though in that case, cpu->exit_request probably
would be replaced by a QemuEvent or something like that).
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Add a user-mode emulation version of the function. More will be
added later, for now it is just process_queued_cpu_work.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Do so before extending it to the user-mode emulators, where there is no
such thing as an "I/O thread".
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Now that cpu_exit() actually kicks all accelerators, use it whenever
the message to another thread is processed in qemu_wait_io_event().
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Now that TCG has its own kick function, make cpu_exit() do the right kick
for all accelerators.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Right now, cpu_exit() is not usable from all accelerators because it
includes a TCG-specific thread kick. In fact, cpu_exit() doubles as
the TCG thread-kick via tcg_kick_vcpu_thread().
In preparation for changing that, inline cpu_exit() into
tcg_kick_vcpu_thread(). The direction of the calls can then be
reversed, with an accelerator-independent cpu_exit() calling into
qemu_vcpu_kick() rather than the opposite.
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Round-robin TCG is calling into cpu_exit() directly. In preparation
for making cpu_exit() usable from all accelerators, define a generic
thread-kick function for TCG which is used directly in the multi-threaded
case, and through CPU_FOREACH in the round-robin case.
Use it also for user-mode emulation, and take the occasion to move
the implementation to accel/tcg/user-exec.c.
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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CPU threads write exit_request as a "note to self" that they need to
go out to a slow path. This write happens out of the BQL and can be
a data race with another threads' cpu_exit(); use atomic accesses
consistently.
While at it, change the source argument from int ("1") to bool ("true").
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Reads and writes cpu->exit_request do not use a load-acquire/store-release
pair right now, but this means that cpu_exit() may not write cpu->exit_request
after any flags that are read by the vCPU thread.
Probably everything is protected one way or the other by the BQL, because
cpu->exit_request leads to the slow path, where the CPU thread often takes
the BQL (for example, to go to sleep by waiting on the BQL-protected
cpu->halt_cond); but it's not clear, so use load-acquire/store-release
consistently.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Writes to interrupt_request used non-atomic accesses, but there are a
few cases where the access was not protected by the BQL. Now that
there is a full set of helpers, it's easier to guarantee that
interrupt_request accesses are fully atomic, so just drop the
requirement instead of fixing them.
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Open coding cpu_reset_interrupt() can cause bugs if the BQL is not
taken, for example i386 has the call chain kvm_cpu_exec() ->
kvm_put_vcpu_events() -> kvm_arch_put_registers().
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Arm leaves around some functions that use cpu_interrupt(), even for
user-mode emulation when the code is unreachable. Pull out the
system-mode implementation to a separate file, and add stubs for
CONFIG_USER_ONLY.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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It is not used by user-mode emulation and is the only caller of
cpu_interrupt() in qemu-i386 and qemu-x86_64.
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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It is not used by user-mode emulation and is the only caller of
cpu_interrupt() in qemu-sparc* binaries.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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It is not used by user-mode emulation and is the only caller of
cpu_interrupt() in qemu-ppc* binaries.
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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To continue our GitLab Open Source Program license we need to pass an
automated license check for all repos under qemu-project. While U-Boot
is clearly GPLv2 rather than fight with the automated validation
script just move the mirror across to a separate project.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Suggested-by: Daniel P. Berrangé <berrange@redhat.com>
Cc: qemu-stable@nongnu.org
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250908141911.2546063-1-alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
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Startup of libgcrypt locks a small pool of pages -- by default 16k.
Testing for zero locked pages is isn't correct, while testing for
32k is a decent compromise.
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
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Of most importance is that this gives us a heads-up if anything
we rely on has been deprecated. The default python behaviour
only emits a warning if triggered from __main__ which is very
limited.
Setting the env variable further ensures that any python child
processes will also display warnings.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
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The iotest 151 creates a bunch of subprocesses, with their stdout
connected to a pipe but never reads any data from them and does
not gurantee the processes are killed on cleanup.
This triggers resource leak warnings from python when the
subprocess.Popen object is garbage collected.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
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This avoids the python resource leak detector from issuing warnings
in the iotests.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
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While QEMUQtestMachine closes the socket that was passed to
QEMUQtestProtocol, the python resource leak manager still
believes that the copy QEMUQtestProtocol holds is open. We
must explicitly call close to avoid this leak warnnig.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
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Our minimum python is now 3.9, so back compat with prior
python versions is no longer required.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
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This patch collects comments and documentation changes from many commits
in the python-qemu-qmp repository; bringing the qemu.git copy in
bit-identical alignment with the standalone library *except* for several
copyright messages that reference the "LICENSE" file which is, for QEMU,
named "COPYING" instead and are therefore left unchanged.
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
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This commit is two backports squashed into one to avoid regressions.
python: *really* remove get_event_loop
A prior commit, aa1ff990, switched away from using get_event_loop *by
default*, but this is not good enough to avoid deprecation warnings as
`asyncio.get_event_loop_policy().get_event_loop()` is *also*
deprecated. Replace this mechanism with explicit calls to
asyncio.get_new_loop() and revise the cleanup mechanisms in __del__ to
match.
python: avoid creating additional event loops per thread
"Too hasty by far!", commit 21ce2ee4 attempted to avoid deprecated
behavior altogether by calling new_event_loop() directly if there was no
loop currently running, but this has the unfortunate side effect of
potentially creating multiple event loops per thread if tests
instantiate multiple QMP connections in a single thread. This behavior
is apparently not well-defined and causes problems in some, but not all,
combinations of Python interpreter version and platform environment.
Partially revert to Daniel Berrange's original patch, which calls
get_event_loop and simply suppresses the deprecation warning in
Python<=3.13. This time, however, additionally register new loops
created with new_event_loop() so that future calls to get_event_loop()
will return the loop already created.
Reported-by: Richard W.M. Jones <rjones@redhat.com>
Reported-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: John Snow <jsnow@redhat.com>
cherry picked from commit python-qemu-qmp@21ce2ee4f2df87efe84a27b9c5112487f4670622
cherry picked from commit python-qemu-qmp@c08fb82b38212956ccffc03fc6d015c3979f42fe
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
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This method was deprecated in 3.12 because it ordinarily should not be
used from coroutines; if there is not a currently running event loop,
this automatically creates a new event loop - which is usually not what
you want from code that would ever run in the bottom half.
In our case, we do want this behavior in two places:
(1) The synchronous shim, for convenience: this allows fully sync
programs to use QEMUMonitorProtocol() without needing to set up an event
loop beforehand. This is intentional to fully box in the async
complexities into the legacy sync shim.
(2) The qmp_tui shell; instead of relying on asyncio.run to create and
run an asyncio program, we need to be able to pass the current asyncio
loop to urwid setup functions. For convenience, again, we create one if
one is not present to simplify the creation of the TUI appliance.
The remaining user of get_event_loop() was in fact one of the erroneous
users that should not have been using this function: if there's no
running event loop inside of a coroutine, you're in big trouble :)
Signed-off-by: John Snow <jsnow@redhat.com>
cherry picked from commit python-qemu-qmp@aa1ff9907603a3033296027e1bd021133df86ef1
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
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Based on the discussion at https://github.com/pypa/pip/issues/9726 -
even though the setuptools documentation implies that it is possible to
guard script execution with optional dependency groups, this is not true
in practice with the scripts generated by pip.
Just do the simple thing and guard the import statements.
Signed-off-by: John Snow <jsnow@redhat.com>
cherry picked from commit python-qemu-qmp@df520dcacf9a75dd4c82ab1129768de4128b554c
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
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Signed-off-by: John Snow <jsnow@redhat.com>
cherry picked from commit python-qemu-qmp@9c889dcbd58817b0c917a9d2dd16161f48ac8203
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
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This is not strictly needed functionality-wise, but doing this allows
sphinx to see which decorated methods are async. Without this, sphinx
misses the "async" classifier on generated docs, which ... for an async
library, isn't great.
It does make an already gnarly function even gnarlier, though.
So, what's going on here?
A synchronous function (like require() before this patch) can return a
coroutine that can be awaited on, for example:
def some_func():
return asyncio.task(asyncio.sleep(5))
async def some_async_func():
await some_func()
However, this function is not considered to be an "async" function in
the eyes of the abstract syntax tree. Specifically,
some_func.__code__.co_flags will not be set with CO_COROUTINE.
The interpreter uses this flag to know if it's legal to use "await" from
within the body of the function. Since this function is just wrapping
another function, it doesn't matter much for the decorator, but sphinx
uses the stdlib inspect.iscoroutinefunction() to determine when to add
the "async" prefix in generated output. This function uses the presence
of CO_COROUTINE.
So, in order to preserve the "async" flag for docs, the require()
decorator needs to differentiate based on whether it is decorating a
sync or async function and use a different wrapping mechanism
accordingly.
Phew.
Signed-off-by: John Snow <jsnow@redhat.com>
cherry picked from commit python-qemu-qmp@40aa9699d619849f528032aa456dd061a4afa957
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
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