From: Jens Freimann <jf...@linux.vnet.ibm.com>
This patch adds live migration support for virtio-ccw devices.
It's not done with vmstate because virtio itself is not yet ported
to vmstate either.
Signed-off-by: Jens Freimann <jf...@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.h...@de.ibm.com>
---
hw/s390x/css.c | 111 +++++++++++++++++++++++++++++++++++++++++++++++++
hw/s390x/css.h | 2 +
hw/s390x/virtio-ccw.c | 95 ++++++++++++++++++++++++++++++++++++++++++
3 files changed, 208 insertions(+)
diff --git a/hw/s390x/css.c b/hw/s390x/css.c
index a813b23..67b22ae 100644
--- a/hw/s390x/css.c
+++ b/hw/s390x/css.c
@@ -1293,6 +1293,117 @@ int css_enable_mss(void)
return 0;
}
+void subch_device_save(SubchDev *s, QEMUFile *f)
+{
+ int i;
+
+ qemu_put_byte(f, s->cssid);
+ qemu_put_byte(f, s->ssid);
+ qemu_put_be16(f, s->schid);
+ qemu_put_be16(f, s->devno);
+ qemu_put_byte(f, s->thinint_active);
+ /* SCHIB */
+ /* PMCW */
+ qemu_put_be32(f, s->curr_status.pmcw.intparm);
+ qemu_put_be16(f, s->curr_status.pmcw.flags);
+ qemu_put_be16(f, s->curr_status.pmcw.devno);
+ qemu_put_byte(f, s->curr_status.pmcw.lpm);
+ qemu_put_byte(f, s->curr_status.pmcw.pnom);
+ qemu_put_byte(f, s->curr_status.pmcw.lpum);
+ qemu_put_byte(f, s->curr_status.pmcw.pim);
+ qemu_put_be16(f, s->curr_status.pmcw.mbi);
+ qemu_put_byte(f, s->curr_status.pmcw.pom);
+ qemu_put_byte(f, s->curr_status.pmcw.pam);
+ qemu_put_buffer(f, s->curr_status.pmcw.chpid, 8);
+ qemu_put_be32(f, s->curr_status.pmcw.chars);
+ /* SCSW */
+ qemu_put_be16(f, s->curr_status.scsw.flags);
+ qemu_put_be16(f, s->curr_status.scsw.ctrl);
+ qemu_put_be32(f, s->curr_status.scsw.cpa);
+ qemu_put_byte(f, s->curr_status.scsw.dstat);
+ qemu_put_byte(f, s->curr_status.scsw.cstat);
+ qemu_put_be16(f, s->curr_status.scsw.count);
+ qemu_put_be64(f, s->curr_status.mba);
+ qemu_put_buffer(f, s->curr_status.mda, 4);
+ /* end SCHIB */
+ qemu_put_buffer(f, s->sense_data, 32);
+ qemu_put_be64(f, s->channel_prog);
+ /* last cmd */
+ qemu_put_byte(f, s->last_cmd.cmd_code);
+ qemu_put_byte(f, s->last_cmd.flags);
+ qemu_put_be16(f, s->last_cmd.count);
+ qemu_put_be32(f, s->last_cmd.cda);
+ qemu_put_byte(f, s->last_cmd_valid);
+ qemu_put_byte(f, s->id.reserved);
+ qemu_put_be16(f, s->id.cu_type);
+ qemu_put_byte(f, s->id.cu_model);
+ qemu_put_be16(f, s->id.dev_type);
+ qemu_put_byte(f, s->id.dev_model);
+ qemu_put_byte(f, s->id.unused);
+ for (i = 0; i < ARRAY_SIZE(s->id.ciw); i++) {
+ qemu_put_byte(f, s->id.ciw[i].type);
+ qemu_put_byte(f, s->id.ciw[i].command);
+ qemu_put_be16(f, s->id.ciw[i].count);
+ }
+ return;
+}
+
+int subch_device_load(SubchDev *s, QEMUFile *f)
+{
+ int i;
+
+ s->cssid = qemu_get_byte(f);
+ s->ssid = qemu_get_byte(f);
+ s->schid = qemu_get_be16(f);
+ s->devno = qemu_get_be16(f);
+ s->thinint_active = qemu_get_byte(f);
+ /* SCHIB */
+ /* PMCW */
+ s->curr_status.pmcw.intparm = qemu_get_be32(f);
+ s->curr_status.pmcw.flags = qemu_get_be16(f);
+ s->curr_status.pmcw.devno = qemu_get_be16(f);
+ s->curr_status.pmcw.lpm = qemu_get_byte(f);
+ s->curr_status.pmcw.pnom = qemu_get_byte(f);
+ s->curr_status.pmcw.lpum = qemu_get_byte(f);
+ s->curr_status.pmcw.pim = qemu_get_byte(f);
+ s->curr_status.pmcw.mbi = qemu_get_be16(f);
+ s->curr_status.pmcw.pom = qemu_get_byte(f);
+ s->curr_status.pmcw.pam = qemu_get_byte(f);
+ qemu_get_buffer(f, s->curr_status.pmcw.chpid, 8);
+ s->curr_status.pmcw.chars = qemu_get_be32(f);
+ /* SCSW */
+ s->curr_status.scsw.flags = qemu_get_be16(f);
+ s->curr_status.scsw.ctrl = qemu_get_be16(f);
+ s->curr_status.scsw.cpa = qemu_get_be32(f);
+ s->curr_status.scsw.dstat = qemu_get_byte(f);
+ s->curr_status.scsw.cstat = qemu_get_byte(f);
+ s->curr_status.scsw.count = qemu_get_be16(f);
+ s->curr_status.mba = qemu_get_be64(f);
+ qemu_get_buffer(f, s->curr_status.mda, 4);
+ /* end SCHIB */
+ qemu_get_buffer(f, s->sense_data, 32);
+ s->channel_prog = qemu_get_be64(f);
+ /* last cmd */
+ s->last_cmd.cmd_code = qemu_get_byte(f);
+ s->last_cmd.flags = qemu_get_byte(f);
+ s->last_cmd.count = qemu_get_be16(f);
+ s->last_cmd.cda = qemu_get_be32(f);
+ s->last_cmd_valid = qemu_get_byte(f);
+ s->id.reserved = qemu_get_byte(f);
+ s->id.cu_type = qemu_get_be16(f);
+ s->id.cu_model = qemu_get_byte(f);
+ s->id.dev_type = qemu_get_be16(f);
+ s->id.dev_model = qemu_get_byte(f);
+ s->id.unused = qemu_get_byte(f);
+ for (i = 0; i < ARRAY_SIZE(s->id.ciw); i++) {
+ s->id.ciw[i].type = qemu_get_byte(f);
+ s->id.ciw[i].command = qemu_get_byte(f);
+ s->id.ciw[i].count = qemu_get_be16(f);
+ }
+ return 0;
+}
+
+
static void css_init(void)
{
channel_subsys = g_malloc0(sizeof(*channel_subsys));
diff --git a/hw/s390x/css.h b/hw/s390x/css.h
index 6586106..c864ea7 100644
--- a/hw/s390x/css.h
+++ b/hw/s390x/css.h
@@ -85,6 +85,8 @@ struct SubchDev {
typedef SubchDev *(*css_subch_cb_func)(uint8_t m, uint8_t cssid, uint8_t ssid,
uint16_t schid);
+void subch_device_save(SubchDev *s, QEMUFile *f);
+int subch_device_load(SubchDev *s, QEMUFile *f);
int css_create_css_image(uint8_t cssid, bool default_image);
bool css_devno_used(uint8_t cssid, uint8_t ssid, uint16_t devno);
void css_subch_assign(uint8_t cssid, uint8_t ssid, uint16_t schid,
diff --git a/hw/s390x/virtio-ccw.c b/hw/s390x/virtio-ccw.c
index c4f21d3..05656a2 100644
--- a/hw/s390x/virtio-ccw.c
+++ b/hw/s390x/virtio-ccw.c
@@ -1275,6 +1275,97 @@ irqroute_error:
return r;
}
+static void virtio_ccw_save_queue(DeviceState *d, int n, QEMUFile *f)
+{
+ VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
+ VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
+
+ qemu_put_be16(f, virtio_queue_vector(vdev, n));
+}
+
+static int virtio_ccw_load_queue(DeviceState *d, int n, QEMUFile *f)
+{
+ VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
+ VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
+ uint16_t vector;
+
+ qemu_get_be16s(f, &vector);
+ virtio_queue_set_vector(vdev, n , vector);
+
+ return 0;
+}
+
+static void virtio_ccw_save_config(DeviceState *d, QEMUFile *f)
+{
+ VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
+ SubchDev *s = dev->sch;
+
+ subch_device_save(s, f);
+ if (dev->indicators != NULL) {
+ qemu_put_be32(f, dev->indicators->len);
+ qemu_put_be64(f, dev->indicators->addr);
+ } else {
+ qemu_put_be32(f, 0);
+ qemu_put_be64(f, 0UL);
+ }
+ if (dev->indicators2 != NULL) {
+ qemu_put_be32(f, dev->indicators2->len);
+ qemu_put_be64(f, dev->indicators2->addr);
+ } else {
+ qemu_put_be32(f, 0);
+ qemu_put_be64(f, 0UL);
+ }
+ if (dev->summary_indicator != NULL) {
+ qemu_put_be32(f, dev->summary_indicator->len);
+ qemu_put_be64(f, dev->summary_indicator->addr);
+ } else {
+ qemu_put_be32(f, 0);
+ qemu_put_be64(f, 0UL);
+ }
+ qemu_put_be64(f, dev->routes.adapter.ind_offset);
+ qemu_put_byte(f, dev->thinint_isc);
+}
+
+static int virtio_ccw_load_config(DeviceState *d, QEMUFile *f)
+{
+ VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
+ SubchDev *s = dev->sch;
+ int len;
+
+ s->driver_data = dev;
+ subch_device_load(s, f);
+ len = qemu_get_be32(f);
+ if (len != 0) {
+ dev->indicators = get_indicator(qemu_get_be64(f), len);
+ } else {
+ qemu_get_be64(f);
+ dev->indicators = NULL;
+ }
+ len = qemu_get_be32(f);
+ if (len != 0) {
+ dev->indicators2 = get_indicator(qemu_get_be64(f), len);
+ } else {
+ qemu_get_be64(f);
+ dev->indicators2 = NULL;
+ }
+ len = qemu_get_be32(f);
+ if (len != 0) {
+ dev->summary_indicator = get_indicator(qemu_get_be64(f), len);
+ } else {
+ qemu_get_be64(f);
+ dev->summary_indicator = NULL;
+ }
+ dev->routes.adapter.ind_offset = qemu_get_be64(f);
+ dev->thinint_isc = qemu_get_byte(f);
+ if (s->thinint_active) {
+ return css_register_io_adapter(CSS_IO_ADAPTER_VIRTIO,
+ dev->thinint_isc, true, false,
+ &dev->routes.adapter.adapter_id);
+ }
+
+ return 0;
+}
+
/**************** Virtio-ccw Bus Device Descriptions *******************/
static Property virtio_ccw_net_properties[] = {
@@ -1597,6 +1688,10 @@ static void virtio_ccw_bus_class_init(ObjectClass
*klass, void *data)
k->query_guest_notifiers = virtio_ccw_query_guest_notifiers;
k->set_host_notifier = virtio_ccw_set_host_notifier;
k->set_guest_notifiers = virtio_ccw_set_guest_notifiers;
+ k->save_queue = virtio_ccw_save_queue;
+ k->load_queue = virtio_ccw_load_queue;
+ k->save_config = virtio_ccw_save_config;
+ k->load_config = virtio_ccw_load_config;
}
static const TypeInfo virtio_ccw_bus_info = {
--
1.7.9.5
