ppc/pnv: Subclass quad xscom callbacks

Make the existing pnv_quad_xscom_read/write be P9 specific, in
preparation for a different P10 callback.

Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Joel Stanley <joel@jms.id.au>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Message-ID: <20230704054204.168547-3-joel@jms.id.au>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>

hw/ppc/pnv.c

@@ -1429,14 +1429,15 @@ static void pnv_chip_power9_instance_init(Object *obj)
 }
 
 static void pnv_chip_quad_realize_one(PnvChip *chip, PnvQuad *eq,
-                                      PnvCore *pnv_core)
+                                      PnvCore *pnv_core,
+                                      const char *type)
 {
     char eq_name[32];
     int core_id = CPU_CORE(pnv_core)->core_id;
 
     snprintf(eq_name, sizeof(eq_name), "eq[%d]", core_id);
     object_initialize_child_with_props(OBJECT(chip), eq_name, eq,
-                                       sizeof(*eq), TYPE_PNV_QUAD,
+                                       sizeof(*eq), type,
                                        &error_fatal, NULL);
 
     object_property_set_int(OBJECT(eq), "quad-id", core_id, &error_fatal);
@@ -1454,7 +1455,8 @@ static void pnv_chip_quad_realize(Pnv9Chip *chip9, Error **errp)
     for (i = 0; i < chip9->nr_quads; i++) {
         PnvQuad *eq = &chip9->quads[i];
 
-        pnv_chip_quad_realize_one(chip, eq, chip->cores[i * 4]);
+        pnv_chip_quad_realize_one(chip, eq, chip->cores[i * 4],
+                                  PNV_QUAD_TYPE_NAME("power9"));
 
         pnv_xscom_add_subregion(chip, PNV9_XSCOM_EQ_BASE(eq->quad_id),
                                 &eq->xscom_regs);
@@ -1666,7 +1668,8 @@ static void pnv_chip_power10_quad_realize(Pnv10Chip *chip10, Error **errp)
     for (i = 0; i < chip10->nr_quads; i++) {
         PnvQuad *eq = &chip10->quads[i];
 
-        pnv_chip_quad_realize_one(chip, eq, chip->cores[i * 4]);
+        pnv_chip_quad_realize_one(chip, eq, chip->cores[i * 4],
+                                  PNV_QUAD_TYPE_NAME("power9"));
 
         pnv_xscom_add_subregion(chip, PNV10_XSCOM_EQ_BASE(eq->quad_id),
                                 &eq->xscom_regs);

hw/ppc/pnv_core.c

@@ -407,19 +407,29 @@ static const MemoryRegionOps pnv_quad_power9_xscom_ops = {
 static void pnv_quad_realize(DeviceState *dev, Error **errp)
 {
     PnvQuad *eq = PNV_QUAD(dev);
+    PnvQuadClass *pqc = PNV_QUAD_GET_CLASS(eq);
     char name[32];
 
     snprintf(name, sizeof(name), "xscom-quad.%d", eq->quad_id);
     pnv_xscom_region_init(&eq->xscom_regs, OBJECT(dev),
-                          &pnv_quad_power9_xscom_ops,
-                          eq, name, PNV9_XSCOM_EQ_SIZE);
+                          pqc->xscom_ops,
+                          eq, name,
+                          pqc->xscom_size);
 }
 
 static Property pnv_quad_properties[] = {
     DEFINE_PROP_UINT32("quad-id", PnvQuad, quad_id, 0),
     DEFINE_PROP_END_OF_LIST(),
 };
 
+static void pnv_quad_power9_class_init(ObjectClass *oc, void *data)
+{
+    PnvQuadClass *pqc = PNV_QUAD_CLASS(oc);
+
+    pqc->xscom_ops = &pnv_quad_power9_xscom_ops;
+    pqc->xscom_size = PNV9_XSCOM_EQ_SIZE;
+}
+
 static void pnv_quad_class_init(ObjectClass *oc, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
@@ -429,16 +439,20 @@ static void pnv_quad_class_init(ObjectClass *oc, void *data)
     dc->user_creatable = false;
 }
 
-static const TypeInfo pnv_quad_info = {
-    .name          = TYPE_PNV_QUAD,
-    .parent        = TYPE_DEVICE,
-    .instance_size = sizeof(PnvQuad),
-    .class_init    = pnv_quad_class_init,
+static const TypeInfo pnv_quad_infos[] = {
+    {
+        .name          = TYPE_PNV_QUAD,
+        .parent        = TYPE_DEVICE,
+        .instance_size = sizeof(PnvQuad),
+        .class_size    = sizeof(PnvQuadClass),
+        .class_init    = pnv_quad_class_init,
+        .abstract      = true,
+    },
+    {
+        .parent = TYPE_PNV_QUAD,
+        .name = PNV_QUAD_TYPE_NAME("power9"),
+        .class_init = pnv_quad_power9_class_init,
+    },
 };
 
-static void pnv_core_register_types(void)
-{
-    type_register_static(&pnv_quad_info);
-}
-
-type_init(pnv_core_register_types)
+DEFINE_TYPES(pnv_quad_infos);

include/hw/ppc/pnv_core.h

@@ -60,8 +60,19 @@ static inline PnvCPUState *pnv_cpu_state(PowerPCCPU *cpu)
     return (PnvCPUState *)cpu->machine_data;
 }
 
+struct PnvQuadClass {
+    DeviceClass parent_class;
+
+    const MemoryRegionOps *xscom_ops;
+    uint64_t xscom_size;
+};
+
 #define TYPE_PNV_QUAD "powernv-cpu-quad"
-OBJECT_DECLARE_SIMPLE_TYPE(PnvQuad, PNV_QUAD)
+
+#define PNV_QUAD_TYPE_SUFFIX "-" TYPE_PNV_QUAD
+#define PNV_QUAD_TYPE_NAME(cpu_model) cpu_model PNV_QUAD_TYPE_SUFFIX
+
+OBJECT_DECLARE_TYPE(PnvQuad, PnvQuadClass, PNV_QUAD)
 
 struct PnvQuad {
     DeviceState parent_obj;