spapr: Move memory hotplug to RTAS_LOG_V6_HP_ID_DRC_COUNT type

Till now memory hotplug used RTAS_LOG_V6_HP_ID_DRC_INDEX hotplug type
which meant that we generated one hotplug type of EPOW event for every
256MB (SPAPR_MEMORY_BLOCK_SIZE). This quickly overruns the kernel
rtas log buffer thus resulting in loss of memory hotplug events. Switch
to RTAS_LOG_V6_HP_ID_DRC_COUNT hotplug type for memory so that we
generate only one event per hotplug request.

Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
Reviewed-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index d00513f..533c7ad 100644 (file)
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -2062,9 +2062,9 @@ static void spapr_add_lmbs(DeviceState *dev, uint64_t addr, uint64_t size,
 
         drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
         drck->attach(drc, dev, fdt, fdt_offset, !dev->hotplugged, errp);
-        spapr_hotplug_req_add_by_index(drc);
         addr += SPAPR_MEMORY_BLOCK_SIZE;
     }
+    spapr_hotplug_req_add_by_count(SPAPR_DR_CONNECTOR_TYPE_LMB, nr_lmbs);
 }
 
 static void spapr_memory_plug(HotplugHandler *hotplug_dev, DeviceState *dev,