PPU: Notify SPUs while waiting for its own state

rpcs3/Emu/Cell/PPUThread.cpp

@@ -2297,6 +2297,27 @@ void ppu_thread::cpu_on_stop()
 	}
 }
 
+void ppu_thread::cpu_wait(bs_t<cpu_flag> old)
+{
+	// Meanwhile while waiting, notify SPU waiters
+	if (u32 addr = res_notify)
+	{
+		res_notify = 0;
+
+		if (res_notify_time == vm::reservation_notifier_count_index(addr).second)
+		{
+			vm::reservation_notifier_notify(addr);
+		}
+	}
+
+	if (old != state)
+	{
+		return;
+	}
+
+	state.wait(old);
+}
+
 void ppu_thread::exec_task()
 {
 	if (g_cfg.core.ppu_decoder != ppu_decoder_type::_static)

rpcs3/Emu/Cell/PPUThread.h

@@ -150,6 +150,7 @@ public:
 	virtual void cpu_task() override final;
 	virtual void cpu_sleep() override;
 	virtual void cpu_on_stop() override;
+	virtual void cpu_wait(bs_t<cpu_flag> old) override;
 	virtual ~ppu_thread() override;
 
 	SAVESTATE_INIT_POS(3);

rpcs3/Emu/Memory/vm.cpp

@@ -387,6 +387,9 @@ namespace vm
 			ok = false;
 		}
 
+		// Do some CPU work
+		cpu.cpu_wait(+cpu_flag::exit);
+
 		if (!ok || cpu.state & cpu_flag::memory)
 		{
 			for (u64 i = 0;; i++)