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-rw-r--r--hw/s390x/Makefile.objs3
-rw-r--r--hw/s390x/s390-virtio-ccw.c57
-rw-r--r--hw/s390x/tod-kvm.c64
-rw-r--r--hw/s390x/tod-qemu.c49
-rw-r--r--hw/s390x/tod.c119
5 files changed, 238 insertions, 54 deletions
diff --git a/hw/s390x/Makefile.objs b/hw/s390x/Makefile.objs
index dc704b5..93282f7 100644
--- a/hw/s390x/Makefile.objs
+++ b/hw/s390x/Makefile.objs
@@ -14,6 +14,9 @@ obj-$(CONFIG_PCI) += s390-pci-bus.o s390-pci-inst.o
obj-$(call lnot,$(CONFIG_PCI)) += s390-pci-stub.o
obj-y += s390-skeys.o
obj-y += s390-stattrib.o
+obj-y += tod.o
+obj-$(CONFIG_KVM) += tod-kvm.o
+obj-$(CONFIG_TCG) += tod-qemu.o
obj-$(CONFIG_KVM) += s390-skeys-kvm.o
obj-$(CONFIG_KVM) += s390-stattrib-kvm.o
obj-y += s390-ccw.o
diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c
index f8f58c8..7983185 100644
--- a/hw/s390x/s390-virtio-ccw.c
+++ b/hw/s390x/s390-virtio-ccw.c
@@ -35,6 +35,7 @@
#include "migration/register.h"
#include "cpu_models.h"
#include "hw/nmi.h"
+#include "hw/s390x/tod.h"
S390CPU *s390_cpu_addr2state(uint16_t cpu_addr)
{
@@ -187,58 +188,6 @@ static void s390_memory_init(ram_addr_t mem_size)
s390_stattrib_init();
}
-#define S390_TOD_CLOCK_VALUE_MISSING 0x00
-#define S390_TOD_CLOCK_VALUE_PRESENT 0x01
-
-static void gtod_save(QEMUFile *f, void *opaque)
-{
- uint64_t tod_low;
- uint8_t tod_high;
- int r;
-
- r = s390_get_clock(&tod_high, &tod_low);
- if (r) {
- warn_report("Unable to get guest clock for migration: %s",
- strerror(-r));
- error_printf("Guest clock will not be migrated "
- "which could cause the guest to hang.");
- qemu_put_byte(f, S390_TOD_CLOCK_VALUE_MISSING);
- return;
- }
-
- qemu_put_byte(f, S390_TOD_CLOCK_VALUE_PRESENT);
- qemu_put_byte(f, tod_high);
- qemu_put_be64(f, tod_low);
-}
-
-static int gtod_load(QEMUFile *f, void *opaque, int version_id)
-{
- uint64_t tod_low;
- uint8_t tod_high;
- int r;
-
- if (qemu_get_byte(f) == S390_TOD_CLOCK_VALUE_MISSING) {
- warn_report("Guest clock was not migrated. This could "
- "cause the guest to hang.");
- return 0;
- }
-
- tod_high = qemu_get_byte(f);
- tod_low = qemu_get_be64(f);
-
- r = s390_set_clock(&tod_high, &tod_low);
- if (r) {
- error_report("Unable to set KVM guest TOD clock: %s", strerror(-r));
- }
-
- return r;
-}
-
-static SaveVMHandlers savevm_gtod = {
- .save_state = gtod_save,
- .load_state = gtod_load,
-};
-
static void s390_init_ipl_dev(const char *kernel_filename,
const char *kernel_cmdline,
const char *initrd_filename, const char *firmware,
@@ -363,8 +312,8 @@ static void ccw_init(MachineState *machine)
s390_create_sclpconsole("sclplmconsole", serial_hd(1));
}
- /* Register savevm handler for guest TOD clock */
- register_savevm_live(NULL, "todclock", 0, 1, &savevm_gtod, NULL);
+ /* init the TOD clock */
+ s390_init_tod();
}
static void s390_cpu_plug(HotplugHandler *hotplug_dev,
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);
diff --git a/hw/s390x/tod-qemu.c b/hw/s390x/tod-qemu.c
new file mode 100644
index 0000000..03ea1ce
--- /dev/null
+++ b/hw/s390x/tod-qemu.c
@@ -0,0 +1,49 @@
+/*
+ * TOD (Time Of Day) clock - QEMU 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"
+
+static void qemu_s390_tod_get(const S390TODState *td, S390TOD *tod,
+ Error **errp)
+{
+ /* FIXME */
+ tod->high = 0;
+ tod->low = 0;
+}
+
+static void qemu_s390_tod_set(S390TODState *td, const S390TOD *tod,
+ Error **errp)
+{
+ /* FIXME */
+}
+
+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 TypeInfo qemu_s390_tod_info = {
+ .name = TYPE_QEMU_S390_TOD,
+ .parent = TYPE_S390_TOD,
+ .instance_size = sizeof(S390TODState),
+ .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);
diff --git a/hw/s390x/tod.c b/hw/s390x/tod.c
new file mode 100644
index 0000000..0501aff
--- /dev/null
+++ b/hw/s390x/tod.c
@@ -0,0 +1,119 @@
+/*
+ * TOD (Time Of Day) clock
+ *
+ * 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 "hw/s390x/tod.h"
+#include "qapi/error.h"
+#include "qemu/error-report.h"
+#include "sysemu/kvm.h"
+#include "migration/register.h"
+
+void s390_init_tod(void)
+{
+ Object *obj;
+
+ if (kvm_enabled()) {
+ obj = object_new(TYPE_KVM_S390_TOD);
+ } else {
+ obj = object_new(TYPE_QEMU_S390_TOD);
+ }
+ object_property_add_child(qdev_get_machine(), TYPE_S390_TOD, obj, NULL);
+ object_unref(obj);
+
+ qdev_init_nofail(DEVICE(obj));
+}
+
+#define S390_TOD_CLOCK_VALUE_MISSING 0x00
+#define S390_TOD_CLOCK_VALUE_PRESENT 0x01
+
+static void s390_tod_save(QEMUFile *f, void *opaque)
+{
+ S390TODState *td = opaque;
+ S390TODClass *tdc = S390_TOD_GET_CLASS(td);
+ Error *err = NULL;
+ S390TOD tod;
+
+ tdc->get(td, &tod, &err);
+ if (err) {
+ warn_report_err(err);
+ error_printf("Guest clock will not be migrated "
+ "which could cause the guest to hang.");
+ qemu_put_byte(f, S390_TOD_CLOCK_VALUE_MISSING);
+ return;
+ }
+
+ qemu_put_byte(f, S390_TOD_CLOCK_VALUE_PRESENT);
+ qemu_put_byte(f, tod.high);
+ qemu_put_be64(f, tod.low);
+}
+
+static int s390_tod_load(QEMUFile *f, void *opaque, int version_id)
+{
+ S390TODState *td = opaque;
+ S390TODClass *tdc = S390_TOD_GET_CLASS(td);
+ Error *err = NULL;
+ S390TOD tod;
+
+ if (qemu_get_byte(f) == S390_TOD_CLOCK_VALUE_MISSING) {
+ warn_report("Guest clock was not migrated. This could "
+ "cause the guest to hang.");
+ return 0;
+ }
+
+ tod.high = qemu_get_byte(f);
+ tod.low = qemu_get_be64(f);
+
+ tdc->set(td, &tod, &err);
+ if (err) {
+ error_report_err(err);
+ return -1;
+ }
+ return 0;
+}
+
+static SaveVMHandlers savevm_tod = {
+ .save_state = s390_tod_save,
+ .load_state = s390_tod_load,
+};
+
+static void s390_tod_realize(DeviceState *dev, Error **errp)
+{
+ S390TODState *td = S390_TOD(dev);
+
+ /* Legacy migration interface */
+ register_savevm_live(NULL, "todclock", 0, 1, &savevm_tod, td);
+}
+
+static void s390_tod_class_init(ObjectClass *oc, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(oc);
+
+ dc->desc = "TOD (Time Of Day) Clock";
+ dc->realize = s390_tod_realize;
+ set_bit(DEVICE_CATEGORY_MISC, dc->categories);
+
+ /* We only have one TOD clock in the system attached to the machine */
+ dc->user_creatable = false;
+}
+
+static TypeInfo s390_tod_info = {
+ .name = TYPE_S390_TOD,
+ .parent = TYPE_DEVICE,
+ .instance_size = sizeof(S390TODState),
+ .class_init = s390_tod_class_init,
+ .class_size = sizeof(S390TODClass),
+ .abstract = true,
+};
+
+static void register_types(void)
+{
+ type_register_static(&s390_tod_info);
+}
+type_init(register_types);
generated by cgit v1.1 at 2024-11-03 12:52:49 +0000