Using qom-list and qom-get to get all the nodes and property values in
a QOM tree can take multiple seconds because it requires 1000's of
individual QOM requests. Some managers fetch the entire tree or a
large subset of it when starting a new VM, and this cost is a
substantial fraction of start up time.
Define the qom-list-get command, which fetches all the properties and
values for a list of paths. This can be much faster than qom-list
plus qom-get. When getting an entire QOM tree, I measured a 10x
speedup in elapsed time.
Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <1752248703-217318-2-git-send-email-steven.sistare@oracle.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Currently, the instance_post_init calls are performed from the leaf
class and all the way up to Object. This is incorrect because the
leaf class cannot observe property values applied by the superclasses;
for example, a compat property will be set on a device *after*
the class's post_init callback has run.
In particular this makes it impossible for implementations of
accel_cpu_instance_init() to operate based on the actual values of
the properties, though it seems that cxl_dsp_instance_post_init and
rp_instance_post_init might have similar issues.
Follow instead the same order as instance_init, starting with Object
and running the child class's instance_post_init after the parent.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
On Emscripten, function pointer casts can result in runtime failures due to
strict function signature checks. This affects the use of g_list_sort and
g_slist_sort, which internally perform function pointer casts that are not
supported by Emscripten. To avoid these issues, g_list_sort_with_data and
g_slist_sort_with_data should be used instead, as they do not rely on
function pointer casting.
Signed-off-by: Kohei Tokunaga <ktokunaga.mail@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <8ca13f4e2b9eba9d1f6030b0afb442a24330e463.1745295397.git.ktokunaga.mail@gmail.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
object_property_help() uses the conventional command line syntax instead
of the JSON syntax. In particular,
- Key-value pairs are written in the command line syntax.
- bool description passed to the function says on/off instead of
true/false.
However, there is one exception: default values are formatted into JSON.
While the command line and JSON syntaxes are consistent in many cases,
there are two types where they disagree:
string: The command line syntax omits quotes while JSON requires them.
bool: JSON only accepts true/false for bool but the command line syntax
accepts on/off too, and on/off are also more popular than
true/false. For example, the docs directory has 2045 "on"
occurances while it has only 194 "true" occurances.
on/off are also accepted by OnOffAuto so users do not have to
remember the type is bool or OnOffAuto to use the values.
Omit quotes for strings and use on/off for bools when formatting
default values for better consistency.
Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Link: https://lore.kernel.org/r/20250207-bool-v1-1-5749d5d6df24@daynix.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The general expectation is that header files should follow the same
file/path naming scheme as the corresponding source file. There are
various historical exceptions to this practice in QEMU, with one of
the most notable being the include/qapi/qmp/ directory. Most of the
headers there correspond to source files in qobject/.
This patch corrects most of that inconsistency by creating
include/qobject/ and moving the headers for qobject/ there.
This also fixes MAINTAINERS for include/qapi/qmp/dispatch.h:
scripts/get_maintainer.pl now reports "QAPI" instead of "No
maintainers found".
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Acked-by: Halil Pasic <pasic@linux.ibm.com> #s390x
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20241118151235.2665921-2-armbru@redhat.com>
[Rebased]
Always explicitly create QEMU system containers upfront.
Root containers will be created when trying to fetch the root object the
1st time. They are:
/objects
/chardevs
/backend
Machine sub-containers will be created only until machine is being
initialized. They are:
/machine/unattached
/machine/peripheral
/machine/peripheral-anon
Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20241121192202.4155849-8-peterx@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
At present, type_register() and type_register_static() are identical,
although their documentation expects the *_static variant to accept
the Typeinfo with the strings that have the static lifetime.
However, the code implementation doesn't have any check or guarantee for
static lifetime. In fact, this is unnecessary because type_new()
duplicates all strings, thereby taking ownership of them.
Therefore, type_register() and type_register_static() are redundant, so
one of them should be removed.
Since the changes required to remove type_register() were smaller,
type_register() was replaced with type_register_static() throughout the
code base. Drop its definition, and delete the requirement about string
lifetime from the documentation.
Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Link: https://lore.kernel.org/r/20241029085934.2799066-17-zhao1.liu@intel.com
There is no real reason to make user-creatable classes different
from other backends in this respect. This also allows modularized
character devices to be treated by qom-list-properties just like
builtin ones.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
object_initialize() can use modules (it was added there because
virtio-gpu-device is a child device of virtio-gpu-pci; commit
64f7aece8e, "object_initialize: try module load", 2020-09-15).
object_new() cannot; make things consistent.
qdev_new() is now just a simple wrapper that returns DeviceState.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Put together the common code of object_initialize() and
module_object_class_by_name() into a function that supports
Error **. Rename the existing function type_get_by_name() to
clarify that it will only look at defined types; this is often
okay within object.c to look at the parents, but not outside it.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
A small optimization/code simplification, that also makes it clear that
we won't look for a type in a not-loaded-yet module---the module will
have been loaded by a call to module_object_class_by_name(), if present.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The function has been unused since commit 4fa28f2390 ("ppc/pnv:
Instantiate cores separately", 2019-12-17). The idea was that
you could use it to build an array of objects via pointer
arithmetic, but no one is doing it anymore.
Cc: Dr. David Alan Gilbert <dave@treblig.org>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
