feat: 更新 VmMachineRunning 和 VmStatusStopping 结构，增强 VM 停止逻辑

Author: ZR233

src/arch/aarch64/vm/running.rs

@@ -18,10 +18,14 @@ impl VmMachineRunningOps for VmMachineRunning {
     type Stopping = VmStatusStopping;
 
     fn stop(self) -> Self::Stopping {
-        Self::Stopping {}
+        Self::Stopping {
+            vmspace: self.common.vmspace,
+        }
     }
 }
 
-pub struct VmStatusStopping {}
+pub struct VmStatusStopping {
+    vmspace: VmAddrSpace,
+}
 
 impl VmMachineStoppingOps for VmStatusStopping {}

src/vm/data.rs

@@ -41,6 +41,7 @@ impl VmDataInner {
             VmMachineState::Running(running) => {
                 let stopping = running.stop();
                 *status_guard = VmMachineState::Stopping(stopping);
+                self.status.store(VMStatus::Stopping);
                 Ok(())
             }
             other => {
@@ -51,7 +52,7 @@ impl VmDataInner {
     }
 
     pub fn wait(&self) -> anyhow::Result<()> {
-        while self.is_active() {
+        while !matches!(self.status(), VMStatus::Stopped) {
             std::thread::sleep(std::time::Duration::from_millis(50));
         }
         self.run_result()

src/vm/machine/running.rs

@@ -67,6 +67,7 @@ impl VmMachineRunningCommon {
                 }
                 waiter.running_cpu_count.fetch_sub(1, Ordering::SeqCst);
                 if waiter.running_cpu_count.load(Ordering::SeqCst) == 0 {
+                    info!("All vCPUs have exited, VM set stopped.");
                     waiter.vm.set_stopped();
                 }
             })