diff --git a/ports/qemu-arm/mpconfigport.h b/ports/qemu-arm/mpconfigport.h
index 3efa1412df..ccee777752 100644
--- a/ports/qemu-arm/mpconfigport.h
+++ b/ports/qemu-arm/mpconfigport.h
@@ -2,7 +2,7 @@
 
 // options to control how MicroPython is built
 
-#define MICROPY_ALLOC_PATH_MAX      (512)
+#define MICROPY_CONFIG_ROM_LEVEL    (MICROPY_CONFIG_ROM_LEVEL_EXTRA_FEATURES)
 
 #if defined(__ARM_ARCH_ISA_ARM)
 #define MICROPY_EMIT_ARM            (1)
@@ -15,42 +15,24 @@
 
 #define MICROPY_MALLOC_USES_ALLOCATED_SIZE (1)
 #define MICROPY_MEM_STATS           (1)
-#define MICROPY_DEBUG_PRINTERS      (0)
 #define MICROPY_ENABLE_GC           (1)
-#define MICROPY_STACK_CHECK         (1)
+#define MICROPY_KBD_EXCEPTION       (0)
 #define MICROPY_HELPER_REPL         (0)
-#define MICROPY_HELPER_LEXER_UNIX   (0)
-#define MICROPY_ENABLE_SOURCE_LINE  (1)
 #define MICROPY_LONGINT_IMPL        (MICROPY_LONGINT_IMPL_MPZ)
 #define MICROPY_FLOAT_IMPL          (MICROPY_FLOAT_IMPL_FLOAT)
-#define MICROPY_CAN_OVERRIDE_BUILTINS (1)
 #define MICROPY_WARNINGS            (1)
-#define MICROPY_PY_ALL_SPECIAL_METHODS (1)
-#define MICROPY_PY_REVERSE_SPECIAL_METHODS (1)
-#define MICROPY_PY_ARRAY_SLICE_ASSIGN (1)
-#define MICROPY_PY_BUILTINS_BYTES_HEX (1)
-#define MICROPY_PY_BUILTINS_FROZENSET (1)
-#define MICROPY_PY_BUILTINS_MEMORYVIEW (1)
-#define MICROPY_PY_BUILTINS_POW3    (1)
-#define MICROPY_PY_IO               (1)
-#define MICROPY_PY_SYS_EXIT         (1)
-#define MICROPY_PY_SYS_MAXSIZE      (1)
+#define MICROPY_PY_BUILTINS_INPUT   (0)
+#define MICROPY_PY_BUILTINS_HELP    (0)
+#define MICROPY_PY_IO_IOBASE        (0)
 #define MICROPY_PY_SYS_PLATFORM     "qemu-arm"
-#define MICROPY_PY_ERRNO            (1)
-#define MICROPY_PY_BINASCII         (1)
-#define MICROPY_PY_RANDOM           (1)
-#define MICROPY_PY_UCTYPES          (1)
-#define MICROPY_PY_DEFLATE          (1)
-#define MICROPY_PY_JSON             (1)
-#define MICROPY_PY_OS               (1)
-#define MICROPY_PY_RE               (1)
-#define MICROPY_PY_HEAPQ            (1)
-#define MICROPY_PY_HASHLIB          (1)
+#define MICROPY_PY_SYS_STDFILES     (0)
+#define MICROPY_PY_SYS_STDIO_BUFFER (0)
+#define MICROPY_PY_SELECT           (0)
+#define MICROPY_PY_TIME             (0)
+#define MICROPY_PY_ASYNCIO          (0)
 #define MICROPY_PY_MACHINE          (1)
 #define MICROPY_PY_MACHINE_INCLUDEFILE "ports/qemu-arm/modmachine.c"
 #define MICROPY_PY_MACHINE_PIN_BASE (1)
-#define MICROPY_PY_MICROPYTHON_MEM_INFO (1)
-#define MICROPY_USE_INTERNAL_PRINTF (1)
 #define MICROPY_VFS                 (1)
 
 // type definitions for the specific machine
@@ -67,6 +49,9 @@ typedef long mp_off_t;
 // We need to provide a declaration/definition of alloca()
 #include <alloca.h>
 
+// We need an implementation of the log2 function which is not a macro.
+#define MP_NEED_LOG2 (1)
+
 #ifdef TEST
 #include "shared/upytesthelper/upytesthelper.h"
 #undef MP_PLAT_PRINT_STRN