diff --git a/procedures/p9/thread_stopall.cpp b/procedures/p9/thread_stopall.cpp
new file mode 100644
index 0000000..8d5f755
--- /dev/null
+++ b/procedures/p9/thread_stopall.cpp
@@ -0,0 +1,52 @@
+#include "registration.hpp"
+
+#include <fmt/format.h>
+extern "C"
+{
+#include <libpdbg.h>
+}
+#include <phosphor-logging/log.hpp>
+
+namespace openpower
+{
+namespace phal
+{
+using namespace phosphor::logging;
+
+/**
+ * @brief Stop instruction executions on all functional threads in the
+ *        host processors.
+ *        This procedure is used to stop all threads in the system in
+ *        attempt best case approach. Like issue processor level stopall
+ *        chip-op with ignore hardware error mode. Since this function
+ *        is used in power-off/error path, ignore the internal error now.
+ */
+void threadStopAll(void)
+{
+    // Set pdbg back-end to sbefifo.
+    pdbg_set_backend(PDBG_BACKEND_SBEFIFO, NULL);
+
+    // initialize the pdbg.
+    pdbg_targets_init(NULL);
+
+    struct pdbg_target* pibTarget;
+
+    pdbg_for_each_class_target("pib", pibTarget)
+    {
+        // probe pib traget.
+        pdbg_target_probe(pibTarget);
+    }
+
+    // Issue system level thread stop
+    if (thread_stop_all() < 0)
+    {
+        log<level::ERR>("Failed to stop all threads");
+        return;
+    }
+    log<level::INFO>("Processor thread stopall completed");
+}
+
+REGISTER_PROCEDURE("threadStopAll", threadStopAll)
+
+} // namespace phal
+} // namespace openpower