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In some situations it's useful to have a qdev property which doesn't automatically set its default value when qdev_property_add_static is called (for instance when the default value is not constant). Support this by adding a flag to the Property struct indicating whether to set the default value. This replaces the existing test for whether the PropertyInfo set_default_value function pointer is NULL, and we set the .set_default field to true for all those cases of struct Property which use a PropertyInfo with a non-NULL set_default_value, so behaviour remains the same as before. This gives us the semantics of: * if .set_default is true, then .info->set_default_value must be not NULL, and .defval is used as the the default value of the property * otherwise, the property system does not set any default, and the field will retain whatever initial value it was given by the device's .instance_init method We define two new macros DEFINE_PROP_SIGNED_NODEFAULT and DEFINE_PROP_UNSIGNED_NODEFAULT, to cover the most plausible use cases of wanting to set an integer property with no default value. Suggested-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Message-id: 1499788408-10096-3-git-send-email-peter.maydell@linaro.org |
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| block | ||
| chardev | ||
| crypto | ||
| disas | ||
| exec | ||
| fpu | ||
| hw | ||
| io | ||
| libdecnumber | ||
| migration | ||
| monitor | ||
| net | ||
| qapi | ||
| qemu | ||
| qom | ||
| standard-headers | ||
| sysemu | ||
| ui | ||
| elf.h | ||
| glib-compat.h | ||
| qemu-common.h | ||
| qemu-io.h | ||
| trace-tcg.h | ||