diff --git a/boards/Kconfig b/boards/Kconfig
index fbab1e97d9..f56c2cab04 100644
--- a/boards/Kconfig
+++ b/boards/Kconfig
@@ -111,6 +111,15 @@ config QEMU_GDBSERVER_LISTEN_DEV
 	  as the `QEMU_EXTRA_FLAGS` environment variable. Refer to application
 	  development doc and/or QEMU invocation doc for more info.
 
+config QEMU_EXTRA_FLAGS
+	string "QEMU extra flags"
+	depends on QEMU_TARGET
+	default ""
+	help
+	  This option is to pass onto QEMU an extra list of parameters
+	  to setup devices, for example to allocate interface for Zephyr
+	  GDBstub over serial with `-serial tcp:127.0.0.1:5678,server`
+
 # There might not be any board options, hence the optional source
 osource "$(BOARD_DIR)/Kconfig"
 endmenu
diff --git a/cmake/emu/qemu.cmake b/cmake/emu/qemu.cmake
index a3a8a94515..6103fc1cef 100644
--- a/cmake/emu/qemu.cmake
+++ b/cmake/emu/qemu.cmake
@@ -399,6 +399,13 @@ set(env_qemu $ENV{QEMU_EXTRA_FLAGS})
 separate_arguments(env_qemu)
 list(APPEND QEMU_EXTRA_FLAGS ${env_qemu})
 
+# Also append QEMU flags from config
+if(NOT CONFIG_QEMU_EXTRA_FLAGS STREQUAL "")
+  set(config_qemu_flags ${CONFIG_QEMU_EXTRA_FLAGS})
+  separate_arguments(config_qemu_flags)
+  list(APPEND QEMU_EXTRA_FLAGS "${config_qemu_flags}")
+endif()
+
 list(APPEND MORE_FLAGS_FOR_debugserver_qemu -S)
 
 if(NOT CONFIG_QEMU_GDBSERVER_LISTEN_DEV STREQUAL "")