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[08/10] s390x/css: add ORB to SubchDev

Message ID 20170505173507.74077-9-pasic@linux.vnet.ibm.com
State New
Headers show

Commit Message

Halil Pasic May 5, 2017, 5:35 p.m. UTC 
Since we are going to need a migration compatibility breaking change to
activate ChannelSubSys migration let us use the opportunity to introduce
ORB to the SubchDev before that (otherwise we would need separate
handling e.g. a compat property).

The ORB will be useful for implementing IDA, or async handling of
subchannel work.

Signed-off-by: Halil Pasic <pasic@linux.vnet.ibm.com>
Reviewed-by: Guenther Hutzl <hutzl@linux.vnet.ibm.com>
---
 hw/s390x/css.c         | 35 +++++++++++++++++++++++++++++++++++
 include/hw/s390x/css.h |  1 +
 2 files changed, 36 insertions(+)
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Patch

diff --git a/hw/s390x/css.c b/hw/s390x/css.c
index 94338b2..d9a0fb9 100644
--- a/hw/s390x/css.c
+++ b/hw/s390x/css.c
@@ -163,6 +163,36 @@  static const VMStateDescription vmstate_sense_id = {
     }
 };
 
+static const VMStateDescription vmstate_orb = {
+    .name = "s390_orb",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .fields = (VMStateField[]) {
+        VMSTATE_UINT32(intparm, ORB),
+        VMSTATE_UINT16(ctrl0, ORB),
+        VMSTATE_UINT8(lpm, ORB),
+        VMSTATE_UINT8(ctrl1, ORB),
+        VMSTATE_UINT32(cpa, ORB),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
+static bool vmstate_schdev_orb_needed(void *opaque)
+{
+    return css_migration_enabled();
+}
+
+static const VMStateDescription vmstate_schdev_orb = {
+    .name = "s390_subch_dev/orb",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .needed = vmstate_schdev_orb_needed,
+    .fields = (VMStateField[]) {
+        VMSTATE_STRUCT(orb, SubchDev, 1, vmstate_orb, ORB),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
 static int subch_dev_post_load(void *opaque, int version_id);
 static void subch_dev_pre_save(void *opaque);
 
@@ -187,6 +217,10 @@  const VMStateDescription vmstate_subch_dev = {
         VMSTATE_BOOL(ccw_fmt_1, SubchDev),
         VMSTATE_UINT8(ccw_no_data_cnt, SubchDev),
         VMSTATE_END_OF_LIST()
+    },
+    .subsections = (const VMStateDescription * []) {
+        &vmstate_schdev_orb,
+        NULL
     }
 };
 
@@ -1234,6 +1268,7 @@  int css_do_ssch(SubchDev *sch, ORB *orb)
     if (channel_subsys.chnmon_active) {
         css_update_chnmon(sch);
     }
+    sch->orb = *orb;
     sch->channel_prog = orb->cpa;
     /* Trigger the start function. */
     s->ctrl |= (SCSW_FCTL_START_FUNC | SCSW_ACTL_START_PEND);
diff --git a/include/hw/s390x/css.h b/include/hw/s390x/css.h
index e67ac5c..dbe093e 100644
--- a/include/hw/s390x/css.h
+++ b/include/hw/s390x/css.h
@@ -88,6 +88,7 @@  struct SubchDev {
     bool thinint_active;
     uint8_t ccw_no_data_cnt;
     uint16_t migrated_schid; /* used for missmatch detection */
+    ORB orb;
     /* transport-provided data: */
     int (*ccw_cb) (SubchDev *, CCW1);
     void (*disable_cb)(SubchDev *);