1 files changed, 58 insertions, 0 deletions
diff --git a/tools/testing/selftests/powerpc/copyloops/memmove_validate.c b/tools/testing/selftests/powerpc/copyloops/memmove_validate.c
new file mode 100644
index 000000000000..1a23218b5757
--- /dev/null
+++ b/tools/testing/selftests/powerpc/copyloops/memmove_validate.c
@@ -0,0 +1,58 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <malloc.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#include "utils.h"
+
+void *TEST_MEMMOVE(const void *s1, const void *s2, size_t n);
+
+#define BUF_LEN 65536
+#define MAX_OFFSET 512
+
+size_t max(size_t a, size_t b)
+{
+	if (a >= b)
+		return a;
+	return b;
+}
+
+static int testcase_run(void)
+{
+	size_t i, src_off, dst_off, len;
+
+	char *usermap = memalign(BUF_LEN, BUF_LEN);
+	char *kernelmap = memalign(BUF_LEN, BUF_LEN);
+
+	assert(usermap != NULL);
+	assert(kernelmap != NULL);
+
+	memset(usermap, 0, BUF_LEN);
+	memset(kernelmap, 0, BUF_LEN);
+
+	for (i = 0; i < BUF_LEN; i++) {
+		usermap[i] = i & 0xff;
+		kernelmap[i] = i & 0xff;
+	}
+
+	for (src_off = 0; src_off < MAX_OFFSET; src_off++) {
+		for (dst_off = 0; dst_off < MAX_OFFSET; dst_off++) {
+			for (len = 1; len < MAX_OFFSET - max(src_off, dst_off); len++) {
+
+				memmove(usermap + dst_off, usermap + src_off, len);
+				TEST_MEMMOVE(kernelmap + dst_off, kernelmap + src_off, len);
+				if (memcmp(usermap, kernelmap, MAX_OFFSET) != 0) {
+					printf("memmove failed at %ld %ld %ld\n",
+							src_off, dst_off, len);
+					abort();
+				}
+			}
+		}
+	}
+	return 0;
+}
+
+int main(void)
+{
+	return test_harness(testcase_run, "memmove");
+}