Merge tag 'migration-20250129-pull-request' of https://gitlab.com/farosas/qemu into staging

Migration pull request

- Purge of ram_save_target_page_legacy
- Cleanups to postcopy, json writer, migration states
- New migration mode cpr-transfer
- Fix for a -Werror=maybe-uninitialized instance in savevm

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* tag 'migration-20250129-pull-request' of https://gitlab.com/farosas/qemu: (42 commits)
  migration: refactor ram_save_target_page functions
  migration: Trivial cleanup on JSON writer of vmstate_save()
  migration: Merge precopy/postcopy on switchover start
  migration: Always set DEVICE state
  migration: Cleanup qemu_savevm_state_complete_precopy()
  migration: Unwrap qemu_savevm_state_complete_precopy() in postcopy
  migration: Notify COMPLETE once for postcopy
  migration: Take BQL slightly longer in postcopy_start()
  migration: Drop cached migration state in migration_maybe_pause()
  migration: Adjust locking in migration_maybe_pause()
  migration: Adjust postcopy bandwidth during switchover
  migration: Synchronize all CPU states only for non-iterable dump
  migration: Drop inactivate_disk param in qemu_savevm_state_complete*
  migration: Avoid two src-downtime-end tracepoints for postcopy
  migration: Optimize postcopy on downtime by avoiding JSON writer
  migration: Do not construct JSON description if suppressed
  migration: Remove postcopy implications in should_send_vmdesc()
  migration: cpr-transfer documentation
  migration-test: cpr-transfer
  tests/qtest: assert qmp connected
  ...

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

1 files changed, 22 insertions, 0 deletions

diff --git a/hw/core/machine.c b/hw/core/machine.c
index c23b399496..2b11bc4f66 100644
--- a/hw/core/machine.c
+++ b/hw/core/machine.c
@@ -457,6 +457,22 @@ static void machine_set_mem_merge(Object *obj, bool value, Error **errp)
     ms->mem_merge = value;
 }
 
+#ifdef CONFIG_POSIX
+static bool machine_get_aux_ram_share(Object *obj, Error **errp)
+{
+    MachineState *ms = MACHINE(obj);
+
+    return ms->aux_ram_share;
+}
+
+static void machine_set_aux_ram_share(Object *obj, bool value, Error **errp)
+{
+    MachineState *ms = MACHINE(obj);
+
+    ms->aux_ram_share = value;
+}
+#endif
+
 static bool machine_get_usb(Object *obj, Error **errp)
 {
     MachineState *ms = MACHINE(obj);
@@ -1162,6 +1178,12 @@ static void machine_class_init(ObjectClass *oc, void *data)
     object_class_property_set_description(oc, "mem-merge",
         "Enable/disable memory merge support");
 
+#ifdef CONFIG_POSIX
+    object_class_property_add_bool(oc, "aux-ram-share",
+                                   machine_get_aux_ram_share,
+                                   machine_set_aux_ram_share);
+#endif
+
     object_class_property_add_bool(oc, "usb",
         machine_get_usb, machine_set_usb);
     object_class_property_set_description(oc, "usb",