spapr: Don't use spapr_drc_needed() in CAS code

We currently don't support hotplug of devices between boot and CAS. If
this happens a CAS reboot is triggered. We detect this during CAS using
the spapr_drc_needed() function which is essentially a VMStateDescription
.needed callback. Even if the condition for CAS reboot happens to be the
same as for DRC migration, it looks wrong to piggyback a migration helper
for this.

Introduce a helper with slightly more explicit name and use it in both CAS
and DRC migration code. Since a subsequent patch will enhance this helper
to cover the case of hot unplug, let's go for spapr_drc_transient(). While
here convert spapr_hotplugged_dev_before_cas() to the "transient" wording as
well.

This doesn't change any behaviour.

Signed-off-by: Greg Kurz <groug@kaod.org>
Message-Id: <158169248180.3465937.9531405453362718771.stgit@bahia.lan>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

1 files changed, 9 insertions, 5 deletions

diff --git a/hw/ppc/spapr_hcall.c b/hw/ppc/spapr_hcall.c
index b8bb66b5c0..6db3dbde9c 100644
--- a/hw/ppc/spapr_hcall.c
+++ b/hw/ppc/spapr_hcall.c
@@ -1640,20 +1640,24 @@ static uint32_t cas_check_pvr(SpaprMachineState *spapr, PowerPCCPU *cpu,
     return best_compat;
 }
 
-static bool spapr_hotplugged_dev_before_cas(void)
+static bool spapr_transient_dev_before_cas(void)
 {
-    Object *drc_container, *obj;
+    Object *drc_container;
     ObjectProperty *prop;
     ObjectPropertyIterator iter;
 
     drc_container = container_get(object_get_root(), "/dr-connector");
     object_property_iter_init(&iter, drc_container);
     while ((prop = object_property_iter_next(&iter))) {
+        SpaprDrc *drc;
+
         if (!strstart(prop->type, "link<", NULL)) {
             continue;
         }
-        obj = object_property_get_link(drc_container, prop->name, NULL);
-        if (spapr_drc_needed(obj)) {
+        drc = SPAPR_DR_CONNECTOR(object_property_get_link(drc_container,
+                                                          prop->name, NULL));
+
+        if (spapr_drc_transient(drc)) {
             return true;
         }
     }
@@ -1830,7 +1834,7 @@ static target_ulong h_client_architecture_support(PowerPCCPU *cpu,
 
     spapr_irq_update_active_intc(spapr);
 
-    if (spapr_hotplugged_dev_before_cas()) {
+    if (spapr_transient_dev_before_cas()) {
         spapr->cas_reboot = true;
     }