watchdog: map the watchdog reset to warm reset

Per debugging requirement, map the watchdog reset to warm reset.
So the ramconsole could be used to capture the kernel log of UOS
before watchdog is hit.

Tracked-On: #2471
Signed-off-by: Yin Fengwei <fengwei.yin@intel.com>
Acked-by: Yu Wang <yu1.wang@intel.com>

devicemodel/core/main.c

@@ -322,6 +322,13 @@ delete_cpu(struct vmctx *ctx, int vcpu)
 	return CPU_EMPTY(&cpumask);
 }
 
+void
+notify_vmloop_thread(void)
+{
+	pthread_kill(mt_vmm_info[0].mt_thr, SIGCONT);
+	return;
+}
+
 static void
 vmexit_inout(struct vmctx *ctx, struct vhm_request *vhm_req, int *pvcpu)
 {