[V9,01/12] cpus: vm_was_suspended

Commit Message

Steven Sistare Jan. 3, 2024, 8:05 p.m. UTC

Add a state variable to remember if a vm previously transitioned into a
suspended state.

Signed-off-by: Steve Sistare <[e-mail]>
Reviewed-by: Peter Xu <[e-mail]>
---
 include/sysemu/runstate.h |  2 ++
 system/cpus.c             | 15 +++++++++++++++
 2 files changed, 17 insertions(+)

Patch

diff --git a/include/sysemu/runstate.h b/include/sysemu/runstate.h
index c8c2bd8..88a67e2 100644
--- a/include/sysemu/runstate.h
+++ b/include/sysemu/runstate.h
@@ -51,6 +51,8 @@  int vm_prepare_start(bool step_pending);
 int vm_stop(RunState state);
 int vm_stop_force_state(RunState state);
 int vm_shutdown(void);
+void vm_set_suspended(bool suspended);
+bool vm_get_suspended(void);
 
 typedef enum WakeupReason {
     /* Always keep QEMU_WAKEUP_REASON_NONE = 0 */
diff --git a/system/cpus.c b/system/cpus.c
index a444a74..9f631ab 100644
--- a/system/cpus.c
+++ b/system/cpus.c
@@ -259,6 +259,21 @@  void cpu_interrupt(CPUState *cpu, int mask)
     }
 }
 
+/*
+ * True if the vm was previously suspended, and has not been woken or reset.
+ */
+static int vm_was_suspended;
+
+void vm_set_suspended(bool suspended)
+{
+    vm_was_suspended = suspended;
+}
+
+bool vm_get_suspended(void)
+{
+    return vm_was_suspended;
+}
+
 static int do_vm_stop(RunState state, bool send_stop)
 {
     int ret = 0;