netd_integration_test: add a test for 64-bit kernel CONFIG_BPF_JIT_ALWAYS_ON

See also:
  https://googleplex-android-review.git.corp.google.com/c/platform/test/vts-testcase/kernel/+/22930654

  isa: Add a test to ensure that a device is using a 64-bit kernel

  Devices launching with Android 14 and later versions of Android must
  use a 64-bit kernel, so add a test to enforce this.

Test: TreeHugger, atest netd_integration_test:KernelTest
Signed-off-by: Maciej Żenczykowski <maze@google.com>
(cherry picked from https://android-review.googlesource.com/q/commit:099e1961906d1b3994b3a0b8c4b679601c9c33b6)
Merged-In: Iafcc9f88f0c761a288e3307792ec5c625edc4ba0
Change-Id: Iafcc9f88f0c761a288e3307792ec5c625edc4ba0
Bug: 283523051

1 files changed, 19 insertions, 0 deletions

diff --git a/tests/kernel_test.cpp b/tests/kernel_test.cpp
index b9e1875e..517b165c 100644
--- a/tests/kernel_test.cpp
+++ b/tests/kernel_test.cpp
@@ -21,6 +21,8 @@
 #include <fstream>
 #include <string>
 
+#include "bpf/KernelUtils.h"
+
 namespace android {
 namespace net {
 
@@ -72,5 +74,22 @@ TEST(KernelTest, TestRateLimitingSupport) {
     ASSERT_TRUE(configVerifier.hasOption("CONFIG_BPF_JIT"));
 }
 
+TEST(KernelTest, TestBpfJitAlwaysOn) {
+    // 32-bit arm & x86 kernels aren't capable of JIT-ing all of our BPF code,
+    if (bpf::isKernel32Bit()) GTEST_SKIP() << "Exempt on 32-bit kernel.";
+    KernelConfigVerifier configVerifier;
+    ASSERT_TRUE(configVerifier.hasOption("CONFIG_BPF_JIT_ALWAYS_ON"));
+}
+
+/* Android 14/U should only launch on 64-bit kernels
+ *   T launches on 5.10/5.15
+ *   U launches on 5.15/6.1
+ * So >=5.16 implies isKernel64Bit()
+ */
+TEST(KernelTest, TestKernel64Bit) {
+    if (!bpf::isAtLeastKernelVersion(5, 16, 0)) GTEST_SKIP() << "Exempt on < 5.16 kernel.";
+    ASSERT_TRUE(bpf::isKernel64Bit());
+}
+
 }  // namespace net
 }  // namespace android