motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-07 09:43:56 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

hw/core/reset: Add qemu_{register, unregister}_resettable()

Browse source 
Implement new functions qemu_register_resettable() and
qemu_unregister_resettable().  These are intended to be
three-phase-reset aware equivalents of the old qemu_register_reset()
and qemu_unregister_reset().  Instead of passing in a function
pointer and opaque, you register any QOM object that implements the
Resettable interface.

The implementation is simple: we have a single global instance of a
ResettableContainer, which we reset in qemu_devices_reset(), and
the Resettable objects passed to qemu_register_resettable() are
added to it.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-id: 20240220160622.114437-8-peter.maydell@linaro.org
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
This commit is contained in:
Peter Maydell 2024-02-20 16:06:19 +00:00
parent 4c046ce37a
commit 86fae16ed2
2 changed files with 63 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

31
hw/core/reset.c
View file

@ -26,8 +26,23 @@
#include "qemu/osdep.h"
#include "qemu/queue.h"
#include "sysemu/reset.h"
#include "hw/resettable.h"
#include "hw/core/resetcontainer.h"
/* reset/shutdown handler */
/*
* Return a pointer to the singleton container that holds all the Resettable
* items that will be reset when qemu_devices_reset() is called.
*/
static ResettableContainer *get_root_reset_container(void)
{
static ResettableContainer *root_reset_container;
if (!root_reset_container) {
root_reset_container =
RESETTABLE_CONTAINER(object_new(TYPE_RESETTABLE_CONTAINER));
}
return root_reset_container;
}
typedef struct QEMUResetEntry {
QTAILQ_ENTRY(QEMUResetEntry) entry;
@ -71,6 +86,16 @@ void qemu_unregister_reset(QEMUResetHandler *func, void *opaque)
}
}
void qemu_register_resettable(Object *obj)
{
resettable_container_add(get_root_reset_container(), obj);
}
void qemu_unregister_resettable(Object *obj)
{
resettable_container_remove(get_root_reset_container(), obj);
}
void qemu_devices_reset(ShutdownCause reason)
{
QEMUResetEntry *re, *nre;
@ -83,5 +108,7 @@ void qemu_devices_reset(ShutdownCause reason)
}
re->func(re->opaque);
}
}
/* Reset the simulation */
resettable_reset(OBJECT(get_root_reset_container()), RESET_TYPE_COLD);
}