Define the vm_resume helper, for use in subsequent patches.

Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
---
 include/sysemu/runstate.h | 8 ++++++++
 system/cpus.c             | 9 +++++++++
 2 files changed, 17 insertions(+)

diff --git a/include/sysemu/runstate.h b/include/sysemu/runstate.h
index 1d6828f..a900cec 100644
--- a/include/sysemu/runstate.h
+++ b/include/sysemu/runstate.h
@@ -55,6 +55,14 @@ void vm_start(void);
  */
 int vm_prepare_start(bool step_pending, RunState state);
 
+/**
+ * vm_resume: If @state is a startable state, start the vm and set the state,
+ * else just set the state.
+ *
+ * @state: the state to restore
+ */
+void vm_resume(RunState state);
+
 int vm_stop(RunState state);
 int vm_stop_force_state(RunState state);
 int vm_shutdown(void);
diff --git a/system/cpus.c b/system/cpus.c
index cbc6d6d..63cf356 100644
--- a/system/cpus.c
+++ b/system/cpus.c
@@ -750,6 +750,15 @@ void vm_start(void)
     }
 }
 
+void vm_resume(RunState state)
+{
+    if (runstate_is_started(state)) {
+        vm_start();
+    } else {
+        runstate_set(state);
+    }
+}
+
 /* does a state transition even if the VM is already stopped,
    current state is forgotten forever */
 int vm_stop_force_state(RunState state)
-- 
1.8.3.1

On Thu, Nov 30, 2023 at 01:37:17PM -0800, Steve Sistare wrote:
> Define the vm_resume helper, for use in subsequent patches.
> 
> Signed-off-by: Steve Sistare <steven.sistare@oracle.com>

Reviewed-by: Peter Xu <peterx@redhat.com>

-- 
Peter Xu