mlkem_test: add mlkem-native

sdk/software/examples/mlkem_test/sw_mlkem_config.h

@@ -0,0 +1,28 @@
+/*
+ * Local mlkem-native configuration for the ML-KEM hardware comparison test.
+ *
+ * The target bare-metal toolchain does not expose one of mlkem-native's
+ * built-in secure zeroization backends once assembly is disabled, so provide a
+ * small volatile-byte zeroizer here.
+ */
+#ifndef SW_MLKEM_CONFIG_H
+#define SW_MLKEM_CONFIG_H
+
+#include "mlkem_native_config.h"
+
+#define MLK_CONFIG_CUSTOM_ZEROIZE
+
+#if !defined(__ASSEMBLER__)
+#include <stddef.h>
+#include <stdint.h>
+#include "src/sys.h"
+
+static MLK_INLINE void mlk_zeroize(void *ptr, size_t len)
+{
+    volatile uint8_t *p = (volatile uint8_t *)ptr;
+    while (len-- != 0u)
+        *p++ = 0u;
+}
+#endif
+
+#endif