s390x/tod: factor out TOD into separate device

Let's treat this like a separate device. TCG will have to store the
actual state/time later on.

Include cpu-qom.h in kvm_s390x.h (due to S390CPU) to compile tod-kvm.c.

Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20180627134410.4901-4-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>

1 files changed, 64 insertions, 0 deletions

diff --git a/hw/s390x/tod-kvm.c b/hw/s390x/tod-kvm.c
new file mode 100644
index 0000000..df564ab
--- /dev/null
+++ b/hw/s390x/tod-kvm.c
@@ -0,0 +1,64 @@
+/*
+ * TOD (Time Of Day) clock - KVM 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 "qapi/error.h"
+#include "hw/s390x/tod.h"
+#include "kvm_s390x.h"
+
+static void kvm_s390_tod_get(const S390TODState *td, S390TOD *tod, Error **errp)
+{
+    int r;
+
+    r = kvm_s390_get_clock_ext(&tod->high, &tod->low);
+    if (r == -ENXIO) {
+        r = kvm_s390_get_clock(&tod->high, &tod->low);
+    }
+    if (r) {
+        error_setg(errp, "Unable to get KVM guest TOD clock: %s",
+                   strerror(-r));
+    }
+}
+
+static void kvm_s390_tod_set(S390TODState *td, const S390TOD *tod, Error **errp)
+{
+    int r;
+
+    r = kvm_s390_set_clock_ext(tod->high, tod->low);
+    if (r == -ENXIO) {
+        r = kvm_s390_set_clock(tod->high, tod->low);
+    }
+    if (r) {
+        error_setg(errp, "Unable to set KVM guest TOD clock: %s",
+                   strerror(-r));
+    }
+}
+
+static void kvm_s390_tod_class_init(ObjectClass *oc, void *data)
+{
+    S390TODClass *tdc = S390_TOD_CLASS(oc);
+
+    tdc->get = kvm_s390_tod_get;
+    tdc->set = kvm_s390_tod_set;
+}
+
+static TypeInfo kvm_s390_tod_info = {
+    .name = TYPE_KVM_S390_TOD,
+    .parent = TYPE_S390_TOD,
+    .instance_size = sizeof(S390TODState),
+    .class_init = kvm_s390_tod_class_init,
+    .class_size = sizeof(S390TODClass),
+};
+
+static void register_types(void)
+{
+    type_register_static(&kvm_s390_tod_info);
+}
+type_init(register_types);