s390/virtio-ccw: migration support

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 <jfrei@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>

1 files changed, 111 insertions, 0 deletions

diff --git a/hw/s390x/css.c b/hw/s390x/css.c
index a813b239ce..67b22aeeee 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));