tests: add RTAS command in the protocol

Add a first test to validate the protocol:

- rtas/get-time-of-day compares the time
  from the guest with the time from the host.

Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Reviewed-by: Greg Kurz <groug@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

tests/rtas-test.c

@@ -0,0 +1,41 @@
+#include "qemu/osdep.h"
+#include "qemu/cutils.h"
+#include "libqtest.h"
+
+#include "libqos/libqos-spapr.h"
+#include "libqos/rtas.h"
+
+static void test_rtas_get_time_of_day(void)
+{
+    QOSState *qs;
+    struct tm tm;
+    uint32_t ns;
+    uint64_t ret;
+    time_t t1, t2;
+
+    qs = qtest_spapr_boot("-machine pseries");
+    g_assert(qs != NULL);
+
+    t1 = time(NULL);
+    ret = qrtas_get_time_of_day(qs->alloc, &tm, &ns);
+    g_assert_cmpint(ret, ==, 0);
+    t2 = mktimegm(&tm);
+    g_assert(t2 - t1 < 5); /* 5 sec max to run the test */
+
+    qtest_spapr_shutdown(qs);
+}
+
+int main(int argc, char *argv[])
+{
+    const char *arch = qtest_get_arch();
+
+    g_test_init(&argc, &argv, NULL);
+
+    if (strcmp(arch, "ppc64")) {
+        g_printerr("RTAS requires ppc64-softmmu/qemu-system-ppc64\n");
+        exit(EXIT_FAILURE);
+    }
+    qtest_add_func("rtas/get-time-of-day", test_rtas_get_time_of_day);
+
+    return g_test_run();
+}