[Qemu-devel] [PATCH 2/2] ppc/xics: introduce ICP DeviceRealize and DeviceReset handlers

["Cédric Le Goater" <clg@kaod.org>]

This changes the IPC realize and reset handlers in DeviceRealize and
DeviceReset handlers. parent handlers are now called from the
inheriting classes which is a cleaner object pattern.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 include/hw/ppc/xics.h |  5 +++--
 hw/intc/xics.c        | 10 ----------
 hw/intc/xics_kvm.c    | 34 +++++++++++++++++++++++++++-------
 hw/intc/xics_pnv.c    | 15 +++++++++++++--
 4 files changed, 43 insertions(+), 21 deletions(-)

diff --git a/include/hw/ppc/xics.h b/include/hw/ppc/xics.h
index adc5f437b118..6ac8a9392da6 100644
--- a/include/hw/ppc/xics.h
+++ b/include/hw/ppc/xics.h
@@ -65,10 +65,11 @@ typedef struct XICSFabric XICSFabric;
 struct ICPStateClass {
     DeviceClass parent_class;
 
-    void (*realize)(ICPState *icp, Error **errp);
+    DeviceRealize parent_realize;
+    DeviceReset parent_reset;
+
     void (*pre_save)(ICPState *icp);
     int (*post_load)(ICPState *icp, int version_id);
-    void (*reset)(ICPState *icp);
     void (*synchronize_state)(ICPState *icp);
 };
 
diff --git a/hw/intc/xics.c b/hw/intc/xics.c
index b351262d1db9..ef5c612dc711 100644
--- a/hw/intc/xics.c
+++ b/hw/intc/xics.c
@@ -294,7 +294,6 @@ static const VMStateDescription vmstate_icp_server = {
 static void icp_reset(void *dev)
 {
     ICPState *icp = ICP(dev);
-    ICPStateClass *icpc = ICP_GET_CLASS(icp);
 
     icp->xirr = 0;
     icp->pending_priority = 0xff;
@@ -302,16 +301,11 @@ static void icp_reset(void *dev)
 
     /* Make all outputs are deasserted */
     qemu_set_irq(icp->output, 0);
-
-    if (icpc->reset) {
-        icpc->reset(icp);
-    }
 }
 
 static void icp_realize(DeviceState *dev, Error **errp)
 {
     ICPState *icp = ICP(dev);
-    ICPStateClass *icpc = ICP_GET_CLASS(dev);
     PowerPCCPU *cpu;
     CPUPPCState *env;
     Object *obj;
@@ -351,10 +345,6 @@ static void icp_realize(DeviceState *dev, Error **errp)
         return;
     }
 
-    if (icpc->realize) {
-        icpc->realize(icp, errp);
-    }
-
     qemu_register_reset(icp_reset, dev);
     vmstate_register(NULL, icp->cs->cpu_index, &vmstate_icp_server, icp);
 }
diff --git a/hw/intc/xics_kvm.c b/hw/intc/xics_kvm.c
index 57d0ebbfaa8a..50d7457abd34 100644
--- a/hw/intc/xics_kvm.c
+++ b/hw/intc/xics_kvm.c
@@ -114,22 +114,38 @@ static int icp_set_kvm_state(ICPState *icp, int version_id)
     return 0;
 }
 
-static void icp_kvm_reset(ICPState *icp)
+static void icp_kvm_reset(DeviceState *dev)
 {
-    icp_set_kvm_state(icp, 1);
+    ICPStateClass *icpc = ICP_GET_CLASS(dev);
+
+    icpc->parent_reset(dev);
+
+    icp_set_kvm_state(ICP(dev), 1);
 }
 
-static void icp_kvm_realize(ICPState *icp, Error **errp)
+static void icp_kvm_realize(DeviceState *dev, Error **errp)
 {
-    CPUState *cs = icp->cs;
+    ICPState *icp = ICP(dev);
+    ICPStateClass *icpc = ICP_GET_CLASS(icp);
+    Error *local_err = NULL;
+    CPUState *cs;
     KVMEnabledICP *enabled_icp;
-    unsigned long vcpu_id = kvm_arch_vcpu_id(cs);
+    unsigned long vcpu_id;
     int ret;
 
     if (kernel_xics_fd == -1) {
         abort();
     }
 
+    icpc->parent_realize(dev, &local_err);
+    if (local_err) {
+        error_propagate(errp, local_err);
+        return;
+    }
+
+    cs = icp->cs;
+    vcpu_id = kvm_arch_vcpu_id(cs);
+
     /*
      * If we are reusing a parked vCPU fd corresponding to the CPU
      * which was hot-removed earlier we don't have to renable
@@ -154,12 +170,16 @@ static void icp_kvm_realize(ICPState *icp, Error **errp)
 
 static void icp_kvm_class_init(ObjectClass *klass, void *data)
 {
+    DeviceClass *dc = DEVICE_CLASS(klass);
     ICPStateClass *icpc = ICP_CLASS(klass);
 
+    device_class_set_parent_realize(dc, icp_kvm_realize,
+                                    &icpc->parent_realize);
+    device_class_set_parent_reset(dc, icp_kvm_reset,
+                                  &icpc->parent_reset);
+
     icpc->pre_save = icp_get_kvm_state;
     icpc->post_load = icp_set_kvm_state;
-    icpc->realize = icp_kvm_realize;
-    icpc->reset = icp_kvm_reset;
     icpc->synchronize_state = icp_synchronize_state;
 }
 
diff --git a/hw/intc/xics_pnv.c b/hw/intc/xics_pnv.c
index c87de2189cf7..fa48505f365e 100644
--- a/hw/intc/xics_pnv.c
+++ b/hw/intc/xics_pnv.c
@@ -18,6 +18,7 @@
  */
 
 #include "qemu/osdep.h"
+#include "qapi/error.h"
 #include "sysemu/sysemu.h"
 #include "qemu/log.h"
 #include "hw/ppc/xics.h"
@@ -158,9 +159,18 @@ static const MemoryRegionOps pnv_icp_ops = {
     },
 };
 
-static void pnv_icp_realize(ICPState *icp, Error **errp)
+static void pnv_icp_realize(DeviceState *dev, Error **errp)
 {
+    ICPState *icp = ICP(dev);
     PnvICPState *pnv_icp = PNV_ICP(icp);
+    ICPStateClass *icpc = ICP_GET_CLASS(icp);
+    Error *local_err = NULL;
+
+    icpc->parent_realize(dev, &local_err);
+    if (local_err) {
+        error_propagate(errp, local_err);
+        return;
+    }
 
     memory_region_init_io(&pnv_icp->mmio, OBJECT(icp), &pnv_icp_ops,
                           icp, "icp-thread", 0x1000);
@@ -171,7 +181,8 @@ static void pnv_icp_class_init(ObjectClass *klass, void *data)
     DeviceClass *dc = DEVICE_CLASS(klass);
     ICPStateClass *icpc = ICP_CLASS(klass);
 
-    icpc->realize = pnv_icp_realize;
+    device_class_set_parent_realize(dc, pnv_icp_realize,
+                                    &icpc->parent_realize);
     dc->desc = "PowerNV ICP";
 }
 
-- 
2.13.6