Merge "fix(SME): add a missing ISB"
diff --git a/tftf/tests/extensions/sme/test_sme.c b/tftf/tests/extensions/sme/test_sme.c
index 4bf6e59..9652b45 100644
--- a/tftf/tests/extensions/sme/test_sme.c
+++ b/tftf/tests/extensions/sme/test_sme.c
@@ -36,6 +36,7 @@
 		ERROR("Could not enable SME.\n");
 		return TEST_RESULT_FAIL;
 	}
+	isb();
 
 	/* Make sure TPIDR2_EL0 is accessible. */
 	write_tpidr2_el0(0);