selftests/bpf: Enable private stack tests for powerpc64

With support of private stack, relevant tests must pass
on powerpc64.

#./test_progs -t struct_ops_private_stack
#434/1   struct_ops_private_stack/private_stack:OK
#434/2   struct_ops_private_stack/private_stack_fail:OK
#434/3   struct_ops_private_stack/private_stack_recur:OK
#434     struct_ops_private_stack:OK
Summary: 1/3 PASSED, 0 SKIPPED, 0 FAILED

Signed-off-by: Abhishek Dubey <adubey@linux.ibm.com>
Tested-by: Venkat Rao Bagalkote <venkat88@linux.ibm.com>
Reviewed-by: Hari Bathini <hbathini@linux.ibm.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20260401103215.104438-2-adubey@linux.ibm.com

Author: Abhishek Dubey

tools/testing/selftests/bpf/prog_tests/struct_ops_private_stack.c

@@ -5,6 +5,7 @@
 #include "struct_ops_private_stack_fail.skel.h"
 #include "struct_ops_private_stack_recur.skel.h"
 
+#if defined(__x86_64__) || defined(__aarch64__) || defined(__powerpc64__)
 static void test_private_stack(void)
 {
 	struct struct_ops_private_stack *skel;
@@ -15,11 +16,6 @@ static void test_private_stack(void)
 	if (!ASSERT_OK_PTR(skel, "struct_ops_private_stack__open"))
 		return;
 
-	if (skel->data->skip) {
-		test__skip();
-		goto cleanup;
-	}
-
 	err = struct_ops_private_stack__load(skel);
 	if (!ASSERT_OK(err, "struct_ops_private_stack__load"))
 		goto cleanup;
@@ -48,15 +44,9 @@ static void test_private_stack_fail(void)
 	if (!ASSERT_OK_PTR(skel, "struct_ops_private_stack_fail__open"))
 		return;
 
-	if (skel->data->skip) {
-		test__skip();
-		goto cleanup;
-	}
-
 	err = struct_ops_private_stack_fail__load(skel);
 	ASSERT_ERR(err, "struct_ops_private_stack_fail__load");
 
-cleanup:
 	struct_ops_private_stack_fail__destroy(skel);
 }
 
@@ -70,11 +60,6 @@ static void test_private_stack_recur(void)
 	if (!ASSERT_OK_PTR(skel, "struct_ops_private_stack_recur__open"))
 		return;
 
-	if (skel->data->skip) {
-		test__skip();
-		goto cleanup;
-	}
-
 	err = struct_ops_private_stack_recur__load(skel);
 	if (!ASSERT_OK(err, "struct_ops_private_stack_recur__load"))
 		goto cleanup;
@@ -93,7 +78,7 @@ static void test_private_stack_recur(void)
 	struct_ops_private_stack_recur__destroy(skel);
 }
 
-void test_struct_ops_private_stack(void)
+static void __test_struct_ops_private_stack(void)
 {
 	if (test__start_subtest("private_stack"))
 		test_private_stack();
@@ -102,3 +87,14 @@ void test_struct_ops_private_stack(void)
 	if (test__start_subtest("private_stack_recur"))
 		test_private_stack_recur();
 }
+#else
+static void __test_struct_ops_private_stack(void)
+{
+	test__skip();
+}
+#endif
+
+void test_struct_ops_private_stack(void)
+{
+	__test_struct_ops_private_stack();
+}

tools/testing/selftests/bpf/progs/struct_ops_private_stack.c

@@ -7,12 +7,6 @@
 
 char _license[] SEC("license") = "GPL";
 
-#if defined(__TARGET_ARCH_x86) || defined(__TARGET_ARCH_arm64)
-bool skip __attribute((__section__(".data"))) = false;
-#else
-bool skip = true;
-#endif
-
 void bpf_testmod_ops3_call_test_2(void) __ksym;
 
 int val_i, val_j;

tools/testing/selftests/bpf/progs/struct_ops_private_stack_fail.c

@@ -7,12 +7,6 @@
 
 char _license[] SEC("license") = "GPL";
 
-#if defined(__TARGET_ARCH_x86) || defined(__TARGET_ARCH_arm64)
-bool skip __attribute((__section__(".data"))) = false;
-#else
-bool skip = true;
-#endif
-
 void bpf_testmod_ops3_call_test_2(void) __ksym;
 
 int val_i, val_j;

tools/testing/selftests/bpf/progs/struct_ops_private_stack_recur.c

@@ -7,12 +7,6 @@
 
 char _license[] SEC("license") = "GPL";
 
-#if defined(__TARGET_ARCH_x86) || defined(__TARGET_ARCH_arm64)
-bool skip __attribute((__section__(".data"))) = false;
-#else
-bool skip = true;
-#endif
-
 void bpf_testmod_ops3_call_test_1(void) __ksym;
 
 int val_i, val_j;