1 files changed, 89 insertions, 0 deletions
diff --git a/hw/s390x/tod-tcg.c b/hw/s390x/tod-tcg.c
new file mode 100644
index 0000000000..9bb94ff72b
--- /dev/null
+++ b/hw/s390x/tod-tcg.c
@@ -0,0 +1,89 @@
+/*
+ * TOD (Time Of Day) clock - TCG implementation
+ *
+ * Copyright 2018 Red Hat, Inc.
+ * Author(s): David Hildenbrand <david@redhat.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#include "qemu/osdep.h"
+#include "qemu-common.h"
+#include "qapi/error.h"
+#include "hw/s390x/tod.h"
+#include "qemu/timer.h"
+#include "qemu/cutils.h"
+#include "qemu/module.h"
+#include "cpu.h"
+#include "tcg/tcg_s390x.h"
+
+static void qemu_s390_tod_get(const S390TODState *td, S390TOD *tod,
+                              Error **errp)
+{
+    *tod = td->base;
+
+    tod->low += time2tod(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL));
+    if (tod->low < td->base.low) {
+        tod->high++;
+    }
+}
+
+static void qemu_s390_tod_set(S390TODState *td, const S390TOD *tod,
+                              Error **errp)
+{
+    CPUState *cpu;
+
+    td->base = *tod;
+
+    td->base.low -= time2tod(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL));
+    if (td->base.low > tod->low) {
+        td->base.high--;
+    }
+
+    /*
+     * The TOD has been changed and we have to recalculate the CKC values
+     * for all CPUs. We do this asynchronously, as "SET CLOCK should be
+     * issued only while all other activity on all CPUs .. has been
+     * suspended".
+     */
+    CPU_FOREACH(cpu) {
+        async_run_on_cpu(cpu, tcg_s390_tod_updated, RUN_ON_CPU_NULL);
+    }
+}
+
+static void qemu_s390_tod_class_init(ObjectClass *oc, void *data)
+{
+    S390TODClass *tdc = S390_TOD_CLASS(oc);
+
+    tdc->get = qemu_s390_tod_get;
+    tdc->set = qemu_s390_tod_set;
+}
+
+static void qemu_s390_tod_init(Object *obj)
+{
+    S390TODState *td = S390_TOD(obj);
+    struct tm tm;
+
+    qemu_get_timedate(&tm, 0);
+    td->base.high = 0;
+    td->base.low = TOD_UNIX_EPOCH + (time2tod(mktimegm(&tm)) * 1000000000ULL);
+    if (td->base.low < TOD_UNIX_EPOCH) {
+        td->base.high += 1;
+    }
+}
+
+static TypeInfo qemu_s390_tod_info = {
+    .name = TYPE_QEMU_S390_TOD,
+    .parent = TYPE_S390_TOD,
+    .instance_size = sizeof(S390TODState),
+    .instance_init = qemu_s390_tod_init,
+    .class_init = qemu_s390_tod_class_init,
+    .class_size = sizeof(S390TODClass),
+};
+
+static void register_types(void)
+{
+    type_register_static(&qemu_s390_tod_info);
+}
+type_init(register_types);