diff --git a/tools/testing/selftests/riscv/hwprobe/cbo.c b/tools/testing/selftests/riscv/hwprobe/cbo.c
index c537d52fafc5..a40541bb7c7d 100644
--- a/tools/testing/selftests/riscv/hwprobe/cbo.c
+++ b/tools/testing/selftests/riscv/hwprobe/cbo.c
@@ -19,7 +19,7 @@
 #include "hwprobe.h"
 #include "../../kselftest.h"
 
-#define MK_CBO(fn) cpu_to_le32((fn) << 20 | 10 << 15 | 2 << 12 | 0 << 7 | 15)
+#define MK_CBO(fn) le32_bswap((uint32_t)(fn) << 20 | 10 << 15 | 2 << 12 | 0 << 7 | 15)
 
 static char mem[4096] __aligned(4096) = { [0 ... 4095] = 0xa5 };
 
diff --git a/tools/testing/selftests/riscv/hwprobe/hwprobe.h b/tools/testing/selftests/riscv/hwprobe/hwprobe.h
index e3fccb390c4d..f3de970c3222 100644
--- a/tools/testing/selftests/riscv/hwprobe/hwprobe.h
+++ b/tools/testing/selftests/riscv/hwprobe/hwprobe.h
@@ -4,6 +4,16 @@
 #include <stddef.h>
 #include <asm/hwprobe.h>
 
+#if __BYTE_ORDER == __BIG_ENDIAN
+# define le32_bswap(_x)				\
+	((((_x) & 0x000000ffU) << 24) |		\
+	 (((_x) & 0x0000ff00U) <<  8) |		\
+	 (((_x) & 0x00ff0000U) >>  8) |		\
+	 (((_x) & 0xff000000U) >> 24))
+#else
+# define le32_bswap(_x) (_x)
+#endif
+
 /*
  * Rather than relying on having a new enough libc to define this, just do it
  * ourselves.  This way we don't need to be coupled to a new-enough libc to