diff --git a/tools/lib/mm/hugepage_settings.h b/tools/lib/mm/hugepage_settings.h
index 548e9d288d1d..94d9fc747f49 100644
--- a/tools/lib/mm/hugepage_settings.h
+++ b/tools/lib/mm/hugepage_settings.h
@@ -87,6 +87,15 @@ void thp_set_read_ahead_path(char *path);
 unsigned long thp_supported_orders(void);
 unsigned long thp_shmem_supported_orders(void);
 
+/*
+ * The per-order shmem_enabled attribute is created for the orders the page
+ * cache can hold, not just for shmem, so it answers for regular files too.
+ */
+static inline unsigned long thp_file_supported_orders(void)
+{
+	return thp_shmem_supported_orders();
+}
+
 bool thp_available(void);
 bool thp_is_enabled(void);
 
diff --git a/tools/testing/selftests/mm/khugepaged.c b/tools/testing/selftests/mm/khugepaged.c
index 189cc4fee18f..5318f3cfc0d0 100644
--- a/tools/testing/selftests/mm/khugepaged.c
+++ b/tools/testing/selftests/mm/khugepaged.c
@@ -1358,6 +1358,25 @@ int main(int argc, char **argv)
 
 	setbuf(stdout, NULL);
 
+	/*
+	 * Without a PMD-order page cache folio the kernel refuses these
+	 * collapses, so there is nothing to test.
+	 */
+	if (!(thp_file_supported_orders() & (1UL << hpage_pmd_order))) {
+		if (shmem_ops) {
+			ksft_print_msg("no PMD-order page cache folio: skipping shmem\n");
+			shmem_ops = NULL;
+		}
+		if (read_only_file_ops) {
+			ksft_print_msg("no PMD-order page cache folio: skipping file\n");
+			read_only_file_ops = NULL;
+			read_write_file_read_ops = NULL;
+			read_write_file_write_ops = NULL;
+		}
+		if (!anon_ops && !shmem_ops && !read_only_file_ops)
+			ksft_exit_skip("No mem_type left to run\n");
+	}
+
 	default_settings.khugepaged.max_ptes_none = hpage_pmd_nr - 1;
 	default_settings.khugepaged.max_ptes_swap = hpage_pmd_nr / 8;
 	default_settings.khugepaged.max_ptes_shared = hpage_pmd_nr / 2;