[PATCH 4/9] selftests: vDSO: vdso_test_abi: Add test for clock_getres_time64()

Thomas Weißschuh
2025-12-23T06:59:28Z

Some architectures will start to implement this function.
Make sure it works correctly.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
---
tools/testing/selftests/vDSO/vdso_test_abi.c | 53 +++++++++++++++++++++++++++-
1 file changed, 52 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/vDSO/vdso_test_abi.c b/tools/testing/selftests/vDSO/vdso_test_abi.c
index a75c12dcb0f1..b162a4ba9c4f 100644
--- a/tools/testing/selftests/vDSO/vdso_test_abi.c
+++ b/tools/testing/selftests/vDSO/vdso_test_abi.c
@@ -36,6 +36,7 @@ typedef long (*vdso_gettimeofday_t)(struct timeval *tv, struct timezone *tz);
typedef long (*vdso_clock_gettime_t)(clockid_t clk_id, struct timespec *ts);
typedef long (*vdso_clock_gettime64_t)(clockid_t clk_id, struct vdso_timespec64 *ts);
typedef long (*vdso_clock_getres_t)(clockid_t clk_id, struct timespec *ts);
+typedef long (*vdso_clock_getres_time64_t)(clockid_t clk_id, struct vdso_timespec64 *ts);
typedef time_t (*vdso_time_t)(time_t *t);

static const char * const vdso_clock_name[] = {
@@ -196,6 +197,55 @@ static void vdso_test_clock_getres(clockid_t clk_id)
}
}

+#ifdef __NR_clock_getres_time64
+static void vdso_test_clock_getres_time64(clockid_t clk_id)
+{
+ int clock_getres_fail = 0;
+
+ /* Find clock_getres. */
+ vdso_clock_getres_time64_t vdso_clock_getres_time64 =
+ (vdso_clock_getres_time64_t)vdso_sym(version, name[7]);
+
+ if (!vdso_clock_getres_time64) {
+ ksft_print_msg("Couldn't find %s\n", name[7]);
+ ksft_test_result_skip("%s %s\n", name[7],
+ vdso_clock_name[clk_id]);
+ return;
+ }
+
+ struct vdso_timespec64 ts, sys_ts;
+ long ret = VDSO_CALL(vdso_clock_getres_time64, 2, clk_id, &ts);
+
+ if (ret == 0) {
+ ksft_print_msg("The vdso resolution is %lld %lld\n",
+ (long long)ts.tv_sec, (long long)ts.tv_nsec);
+ } else {
+ clock_getres_fail++;
+ }
+
+ ret = syscall(__NR_clock_getres_time64, clk_id, &sys_ts);
+
+ ksft_print_msg("The syscall resolution is %lld %lld\n",
+ (long long)sys_ts.tv_sec, (long long)sys_ts.tv_nsec);
+
+ if ((sys_ts.tv_sec != ts.tv_sec) || (sys_ts.tv_nsec != ts.tv_nsec))
+ clock_getres_fail++;
+
+ if (clock_getres_fail > 0) {
+ ksft_test_result_fail("%s %s\n", name[7],
+ vdso_clock_name[clk_id]);
+ } else {
+ ksft_test_result_pass("%s %s\n", name[7],
+ vdso_clock_name[clk_id]);
+ }
+}
+#else /* !__NR_clock_getres_time64 */
+static void vdso_test_clock_getres_time64(clockid_t clk_id)
+{
+ ksft_test_result_skip("%s %s\n", name[7], vdso_clock_name[clk_id]);
+}
+#endif /* __NR_clock_getres_time64 */
+
/*
* This function calls vdso_test_clock_gettime and vdso_test_clock_getres
* with different values for clock_id.
@@ -208,9 +258,10 @@ static inline void vdso_test_clock(clockid_t clock_id)
vdso_test_clock_gettime64(clock_id);

vdso_test_clock_getres(clock_id);
+ vdso_test_clock_getres_time64(clock_id);
}

-#define VDSO_TEST_PLAN 29
+#define VDSO_TEST_PLAN 38

int main(int argc, char **argv)
{

--
2.52.0