diff --git a/rpcs3/Emu/RSX/Host/MM.cpp b/rpcs3/Emu/RSX/Host/MM.cpp
index b8968f1d29..d843e17ff8 100644
--- a/rpcs3/Emu/RSX/Host/MM.cpp
+++ b/rpcs3/Emu/RSX/Host/MM.cpp
@@ -99,6 +99,6 @@ namespace rsx
 		}
 
 		auto& rsxdma = g_fxo->get<rsx::dma_manager>();
-		rsxdma.backend_ctrl(static_cast<u32>(mm_backend_ctrl::mm_flush), nullptr);
+		rsxdma.backend_ctrl(mm_backend_ctrl::mm_flush, nullptr);
 	}
 }
diff --git a/rpcs3/Emu/RSX/Host/MM.h b/rpcs3/Emu/RSX/Host/MM.h
index 96e5229095..b4b73d7b2b 100644
--- a/rpcs3/Emu/RSX/Host/MM.h
+++ b/rpcs3/Emu/RSX/Host/MM.h
@@ -28,9 +28,9 @@ namespace rsx
 		}
 	};
 
-	enum class mm_backend_ctrl : u32
+	enum mm_backend_ctrl : u32
 	{
-		mm_flush = 0x80000002
+		mm_flush = 0x81000000,
 	};
 
 	void mm_protect(void* start, u64 length, utils::protection prot);
diff --git a/rpcs3/Emu/RSX/RSXThread.cpp b/rpcs3/Emu/RSX/RSXThread.cpp
index f266a25587..858e3e1471 100644
--- a/rpcs3/Emu/RSX/RSXThread.cpp
+++ b/rpcs3/Emu/RSX/RSXThread.cpp
@@ -9,6 +9,7 @@
 #include "Common/time.hpp"
 #include "Core/RSXReservationLock.hpp"
 #include "Core/RSXEngLock.hpp"
+#include "Host/MM.h"
 #include "Host/RSXDMAWriter.h"
 #include "NV47/HW/context.h"
 #include "Program/GLSLCommon.h"
@@ -3627,10 +3628,25 @@ namespace rsx
 			on_invalidate_memory_range(m_invalidated_memory_range, rsx::invalidation_cause::read);
 		}
 
+		// Host sync
+		rsx::mm_flush();
+
 		on_invalidate_memory_range(m_invalidated_memory_range, rsx::invalidation_cause::unmap);
 		m_invalidated_memory_range.invalidate();
 	}
 
+	void thread::renderctl(u32 request_code, void* args)
+	{
+		switch (request_code)
+		{
+		case rsx::mm_backend_ctrl::mm_flush:
+			rsx::mm_flush();
+			break;
+		default:
+			fmt::throw_exception("Unknown backend request: 0x%x", request_code);
+		}
+	}
+
 	//Pause/cont wrappers for FIFO ctrl. Never call this from rsx thread itself!
 	void thread::pause()
 	{
diff --git a/rpcs3/Emu/RSX/RSXThread.h b/rpcs3/Emu/RSX/RSXThread.h
index b7bf5ff83e..e92e02c6cd 100644
--- a/rpcs3/Emu/RSX/RSXThread.h
+++ b/rpcs3/Emu/RSX/RSXThread.h
@@ -404,7 +404,7 @@ namespace rsx
 		virtual void notify_tile_unbound(u32 /*tile*/) {}
 
 		// control
-		virtual void renderctl(u32 /*request_code*/, void* /*args*/) {}
+		virtual void renderctl(u32 request_code, void* args);
 
 		// zcull
 		void notify_zcull_info_changed();
diff --git a/rpcs3/Emu/RSX/VK/VKCommandStream.h b/rpcs3/Emu/RSX/VK/VKCommandStream.h
index 31dc703593..4ee4d00e19 100644
--- a/rpcs3/Emu/RSX/VK/VKCommandStream.h
+++ b/rpcs3/Emu/RSX/VK/VKCommandStream.h
@@ -10,7 +10,6 @@ namespace vk
 	{
 		rctrl_queue_submit = 0x80000000,
 		rctrl_run_gc       = 0x80000001,
-		rctrl_mem_protect  = 0x80000002,
 	};
 
 	struct submit_packet
diff --git a/rpcs3/Emu/RSX/VK/VKGSRender.cpp b/rpcs3/Emu/RSX/VK/VKGSRender.cpp
index c31a1ac515..5a02197548 100644
--- a/rpcs3/Emu/RSX/VK/VKGSRender.cpp
+++ b/rpcs3/Emu/RSX/VK/VKGSRender.cpp
@@ -2829,13 +2829,8 @@ void VKGSRender::renderctl(u32 request_code, void* args)
 		vk::on_event_completed(eid, true);
 		break;
 	}
-	case vk::rctrl_mem_protect:
-	{
-		rsx::mm_flush();
-		break;
-	}
 	default:
-		fmt::throw_exception("Unhandled request code 0x%x", request_code);
+		rsx::thread::renderctl(request_code, args);
 	}
 }