[Qemu-devel] [RFC PATCH v0 4/5] spapr: Support hotplug by specifying DRC count

[Bharata B Rao <bharata@linux.vnet.ibm.com>]

Support hotplug identifier type RTAS_LOG_V6_HP_ID_DRC_COUNT that allows
hotplugging of DRCs by specifying the DRC count.

While we are here, rename

spapr_hotplug_req_add_event() to spapr_hotplug_req_add_by_index()
spapr_hotplug_req_remove_event() to spapr_hotplug_req_remove_by_index()

so that they match with spapr_hotplug_req_add_by_count().

Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
---
 hw/ppc/spapr.c         |  2 +-
 hw/ppc/spapr_events.c  | 47 ++++++++++++++++++++++++++++++++++++++---------
 hw/ppc/spapr_pci.c     |  4 ++--
 include/hw/ppc/spapr.h |  8 ++++++--
 4 files changed, 47 insertions(+), 14 deletions(-)

diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index 669dc43..13af9be 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -2072,7 +2072,7 @@ 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_event(drc);
+        spapr_hotplug_req_add_by_index(drc);
         addr += SPAPR_MEMORY_BLOCK_SIZE;
     }
 }
diff --git a/hw/ppc/spapr_events.c b/hw/ppc/spapr_events.c
index 98bf7ae..744ea62 100644
--- a/hw/ppc/spapr_events.c
+++ b/hw/ppc/spapr_events.c
@@ -386,7 +386,9 @@ static void spapr_powerdown_req(Notifier *n, void *opaque)
     qemu_irq_pulse(xics_get_qirq(spapr->icp, spapr->check_exception_irq));
 }
 
-static void spapr_hotplug_req_event(sPAPRDRConnector *drc, uint8_t hp_action)
+static void spapr_hotplug_req_event(uint8_t hp_id, uint8_t hp_action,
+                                    sPAPRDRConnectorType drc_type,
+                                    uint32_t drc)
 {
     sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
     struct hp_log_full *new_hp;
@@ -395,8 +397,6 @@ static void spapr_hotplug_req_event(sPAPRDRConnector *drc, uint8_t hp_action)
     struct rtas_event_log_v6_maina *maina;
     struct rtas_event_log_v6_mainb *mainb;
     struct rtas_event_log_v6_hp *hp;
-    sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
-    sPAPRDRConnectorType drc_type = drck->get_type(drc);
 
     new_hp = g_malloc0(sizeof(struct hp_log_full));
     hdr = &new_hp->hdr;
@@ -427,8 +427,7 @@ static void spapr_hotplug_req_event(sPAPRDRConnector *drc, uint8_t hp_action)
     hp->hdr.section_length = cpu_to_be16(sizeof(*hp));
     hp->hdr.section_version = 1; /* includes extended modifier */
     hp->hotplug_action = hp_action;
-    hp->drc.index = cpu_to_be32(drck->get_index(drc));
-    hp->hotplug_identifier = RTAS_LOG_V6_HP_ID_DRC_INDEX;
+    hp->hotplug_identifier = hp_id;
 
     switch (drc_type) {
     case SPAPR_DR_CONNECTOR_TYPE_PCI:
@@ -445,19 +444,49 @@ static void spapr_hotplug_req_event(sPAPRDRConnector *drc, uint8_t hp_action)
         return;
     }
 
+    if (hp_id == RTAS_LOG_V6_HP_ID_DRC_COUNT) {
+        hp->drc.count = cpu_to_be32(drc);
+    } else if (hp_id == RTAS_LOG_V6_HP_ID_DRC_INDEX) {
+        hp->drc.index = cpu_to_be32(drc);
+    }
+
     rtas_event_log_queue(RTAS_LOG_TYPE_HOTPLUG, new_hp, true);
 
     qemu_irq_pulse(xics_get_qirq(spapr->icp, spapr->check_exception_irq));
 }
 
-void spapr_hotplug_req_add_event(sPAPRDRConnector *drc)
+void spapr_hotplug_req_add_by_index(sPAPRDRConnector *drc)
+{
+    sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
+    sPAPRDRConnectorType drc_type = drck->get_type(drc);
+    uint32 index = drck->get_index(drc);
+
+    spapr_hotplug_req_event(RTAS_LOG_V6_HP_ID_DRC_INDEX,
+                            RTAS_LOG_V6_HP_ACTION_ADD, drc_type, index);
+}
+
+void spapr_hotplug_req_remove_by_index(sPAPRDRConnector *drc)
+{
+    sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
+    sPAPRDRConnectorType drc_type = drck->get_type(drc);
+    uint32 index = drck->get_index(drc);
+
+    spapr_hotplug_req_event(RTAS_LOG_V6_HP_ID_DRC_INDEX,
+                            RTAS_LOG_V6_HP_ACTION_REMOVE, drc_type, index);
+}
+
+void spapr_hotplug_req_add_by_count(sPAPRDRConnectorType drc_type,
+                                       uint32_t count)
 {
-    spapr_hotplug_req_event(drc, RTAS_LOG_V6_HP_ACTION_ADD);
+    spapr_hotplug_req_event(RTAS_LOG_V6_HP_ID_DRC_COUNT,
+                            RTAS_LOG_V6_HP_ACTION_ADD, drc_type, count);
 }
 
-void spapr_hotplug_req_remove_event(sPAPRDRConnector *drc)
+void spapr_hotplug_req_remove_by_count(sPAPRDRConnectorType drc_type,
+                                          uint32_t count)
 {
-    spapr_hotplug_req_event(drc, RTAS_LOG_V6_HP_ACTION_REMOVE);
+    spapr_hotplug_req_event(RTAS_LOG_V6_HP_ID_DRC_COUNT,
+                            RTAS_LOG_V6_HP_ACTION_REMOVE, drc_type, count);
 }
 
 static void check_exception(PowerPCCPU *cpu, sPAPRMachineState *spapr,
diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c
index cfd3b7b..9d41060 100644
--- a/hw/ppc/spapr_pci.c
+++ b/hw/ppc/spapr_pci.c
@@ -1179,7 +1179,7 @@ static void spapr_phb_hot_plug_child(HotplugHandler *plug_handler,
         return;
     }
     if (plugged_dev->hotplugged) {
-        spapr_hotplug_req_add_event(drc);
+        spapr_hotplug_req_add_by_index(drc);
     }
 }
 
@@ -1207,7 +1207,7 @@ static void spapr_phb_hot_unplug_child(HotplugHandler *plug_handler,
             error_propagate(errp, local_err);
             return;
         }
-        spapr_hotplug_req_remove_event(drc);
+        spapr_hotplug_req_remove_by_index(drc);
     }
 }
 
diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h
index b6cb0d0..d87c6d4 100644
--- a/include/hw/ppc/spapr.h
+++ b/include/hw/ppc/spapr.h
@@ -588,8 +588,12 @@ int spapr_dma_dt(void *fdt, int node_off, const char *propname,
 int spapr_tcet_dma_dt(void *fdt, int node_off, const char *propname,
                       sPAPRTCETable *tcet);
 void spapr_pci_switch_vga(bool big_endian);
-void spapr_hotplug_req_add_event(sPAPRDRConnector *drc);
-void spapr_hotplug_req_remove_event(sPAPRDRConnector *drc);
+void spapr_hotplug_req_add_by_index(sPAPRDRConnector *drc);
+void spapr_hotplug_req_remove_by_index(sPAPRDRConnector *drc);
+void spapr_hotplug_req_add_by_count(sPAPRDRConnectorType drc_type,
+                                       uint32_t count);
+void spapr_hotplug_req_remove_by_count(sPAPRDRConnectorType drc_type,
+                                          uint32_t count);
 
 /* rtas-configure-connector state */
 struct sPAPRConfigureConnectorState {
-- 
2.1.0