[Qemu-devel] [PATCH 11/16] introduce ICC bus/device/bridge

[Igor Mammedov <imammedo@redhat.com>]

... to provide hotplug-able bus.

* icc-bridge will serve as a parent for icc-bus and provide
  mmio mapping services to child icc-devices.
* icc-device will replace SysBusDevice as a parent of APIC
  and IOAPIC devices.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
---
v2:
  * Rebase on top the last HW reorganization series.
  * Move hw/icc_bus.c into hw/cpu/ and hw/icc_bus.h include/hw/i386/
---
 default-configs/i386-softmmu.mak   |  1 +
 default-configs/x86_64-softmmu.mak |  1 +
 hw/cpu/Makefile.objs               |  1 +
 hw/cpu/icc_bus.c                   | 88 ++++++++++++++++++++++++++++++++++++++
 hw/i386/pc_piix.c                  |  7 +++
 hw/i386/pc_q35.c                   |  7 +++
 include/hw/i386/icc_bus.h          | 53 +++++++++++++++++++++++
 7 files changed, 158 insertions(+)
 create mode 100644 hw/cpu/icc_bus.c
 create mode 100644 include/hw/i386/icc_bus.h

diff --git a/default-configs/i386-softmmu.mak b/default-configs/i386-softmmu.mak
index 4ac0694..0789303 100644
--- a/default-configs/i386-softmmu.mak
+++ b/default-configs/i386-softmmu.mak
@@ -45,3 +45,4 @@ CONFIG_LPC_ICH9=y
 CONFIG_Q35=y
 CONFIG_APIC=y
 CONFIG_IOAPIC=y
+CONFIG_ICC_BUS=y
diff --git a/default-configs/x86_64-softmmu.mak b/default-configs/x86_64-softmmu.mak
index bf4091c..8d03e9a 100644
--- a/default-configs/x86_64-softmmu.mak
+++ b/default-configs/x86_64-softmmu.mak
@@ -45,3 +45,4 @@ CONFIG_LPC_ICH9=y
 CONFIG_Q35=y
 CONFIG_APIC=y
 CONFIG_IOAPIC=y
+CONFIG_ICC_BUS=y
diff --git a/hw/cpu/Makefile.objs b/hw/cpu/Makefile.objs
index a49ca04..4461ece 100644
--- a/hw/cpu/Makefile.objs
+++ b/hw/cpu/Makefile.objs
@@ -1,4 +1,5 @@
 obj-$(CONFIG_ARM11MPCORE) += arm11mpcore.o
 obj-$(CONFIG_ARM9MPCORE) += a9mpcore.o
 obj-$(CONFIG_ARM15MPCORE) += a15mpcore.o
+obj-$(CONFIG_ICC_BUS) += icc_bus.o
 
diff --git a/hw/cpu/icc_bus.c b/hw/cpu/icc_bus.c
new file mode 100644
index 0000000..00b9be3
--- /dev/null
+++ b/hw/cpu/icc_bus.c
@@ -0,0 +1,88 @@
+/* icc_bus.c
+ * emulate x86 ICC(INTERRUPT CONTROLLER COMMUNICATIONS) bus
+ *
+ * Copyright (c) 2013 Red Hat, Inc
+ *
+ * Authors:
+ *     Igor Mammedov <imammedo@redhat.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>
+ */
+#include "hw/i386/icc_bus.h"
+#include "hw/sysbus.h"
+
+static void icc_bus_initfn(Object *obj)
+{
+    BusState *b = BUS(obj);
+    b->allow_hotplug = true;
+}
+
+static const TypeInfo icc_bus_info = {
+    .name = TYPE_ICC_BUS,
+    .parent = TYPE_BUS,
+    .instance_size = sizeof(ICCBus),
+    .instance_init = icc_bus_initfn,
+};
+
+static int icc_device_init(DeviceState *dev)
+{
+    ICCDevice *id = ICC_DEVICE(dev);
+    ICCDeviceClass *k = ICC_DEVICE_GET_CLASS(id);
+
+    return k->init(id);
+}
+
+static void icc_device_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *k = DEVICE_CLASS(klass);
+
+    k->init = icc_device_init;
+    k->bus_type = TYPE_ICC_BUS;
+}
+
+static const TypeInfo icc_device_info = {
+    .name = TYPE_ICC_DEVICE,
+    .parent = TYPE_DEVICE,
+    .abstract = true,
+    .instance_size = sizeof(ICCDevice),
+    .class_size = sizeof(ICCDeviceClass),
+    .class_init = icc_device_class_init,
+};
+
+typedef struct ICCBridgeState {
+    SysBusDevice busdev;
+} ICCBridgeState;
+#define ICC_BRIGDE(obj) OBJECT_CHECK(ICCBridgeState, (obj), TYPE_ICC_BRIDGE)
+
+
+static void icc_bridge_initfn(Object *obj)
+{
+    qbus_create(TYPE_ICC_BUS, DEVICE(obj), "icc-bus");
+}
+
+static const TypeInfo icc_bridge_info = {
+    .name  = "icc-bridge",
+    .parent = TYPE_SYS_BUS_DEVICE,
+    .instance_init  = icc_bridge_initfn,
+    .instance_size  = sizeof(ICCBridgeState),
+};
+
+static void icc_bus_register_types(void)
+{
+    type_register_static(&icc_bus_info);
+    type_register_static(&icc_device_info);
+    type_register_static(&icc_bridge_info);
+}
+
+type_init(icc_bus_register_types)
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index cff8013..d8c3e1a 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -37,6 +37,7 @@
 #include "hw/kvm/clock.h"
 #include "sysemu/sysemu.h"
 #include "hw/sysbus.h"
+#include "hw/i386/icc_bus.h"
 #include "sysemu/arch_init.h"
 #include "sysemu/blockdev.h"
 #include "hw/i2c/smbus.h"
@@ -84,8 +85,13 @@ static void pc_init1(MemoryRegion *system_memory,
     MemoryRegion *ram_memory;
     MemoryRegion *pci_memory;
     MemoryRegion *rom_memory;
+    DeviceState *icc_bridge;
     void *fw_cfg = NULL;
 
+    icc_bridge = qdev_create(NULL, TYPE_ICC_BRIDGE);
+    object_property_add_child(qdev_get_machine(), "icc-bridge",
+                              OBJECT(icc_bridge), NULL);
+
     pc_cpus_init(cpu_model);
     pc_acpi_init("acpi-dsdt.aml");
 
@@ -160,6 +166,7 @@ static void pc_init1(MemoryRegion *system_memory,
     if (pci_enabled) {
         ioapic_init_gsi(gsi_state, "i440fx");
     }
+    qdev_init_nofail(icc_bridge);
 
     pc_register_ferr_irq(gsi[13]);
 
diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
index 6ac1a89..9055145 100644
--- a/hw/i386/pc_q35.c
+++ b/hw/i386/pc_q35.c
@@ -41,6 +41,7 @@
 #include "hw/ide/pci.h"
 #include "hw/ide/ahci.h"
 #include "hw/usb.h"
+#include "hw/i386/icc_bus.h"
 
 /* ICH9 AHCI has 6 ports */
 #define MAX_SATA_PORTS     6
@@ -85,6 +86,11 @@ static void pc_q35_init(QEMUMachineInitArgs *args)
     ICH9LPCState *ich9_lpc;
     PCIDevice *ahci;
     qemu_irq *cmos_s3;
+    DeviceState *icc_bridge;
+
+    icc_bridge = qdev_create(NULL, TYPE_ICC_BRIDGE);
+    object_property_add_child(qdev_get_machine(), "icc-bridge",
+                              OBJECT(icc_bridge), NULL);
 
     pc_cpus_init(cpu_model);
     pc_acpi_init("q35-acpi-dsdt.aml");
@@ -168,6 +174,7 @@ static void pc_q35_init(QEMUMachineInitArgs *args)
     if (pci_enabled) {
         ioapic_init_gsi(gsi_state, NULL);
     }
+    qdev_init_nofail(icc_bridge);
 
     pc_register_ferr_irq(gsi[13]);
 
diff --git a/include/hw/i386/icc_bus.h b/include/hw/i386/icc_bus.h
new file mode 100644
index 0000000..aa30e0c
--- /dev/null
+++ b/include/hw/i386/icc_bus.h
@@ -0,0 +1,53 @@
+/* icc_bus.h
+ * emulate x86 ICC(INTERRUPT CONTROLLER COMMUNICATIONS) bus
+ *
+ * Copyright (c) 2013 Red Hat, Inc
+ *
+ * Authors:
+ *     Igor Mammedov <imammedo@redhat.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>
+ */
+#ifndef ICC_BUS_H
+#define ICC_BUS_H
+
+#include "hw/qdev-core.h"
+
+#define TYPE_ICC_BUS "icc-bus"
+
+#ifndef CONFIG_USER_ONLY
+typedef struct ICCBus {
+    BusState qbus;
+} ICCBus;
+#define ICC_BUS(obj) OBJECT_CHECK(ICCBus, (obj), TYPE_ICC_BUS)
+
+typedef struct ICCDevice {
+    DeviceState qdev;
+} ICCDevice;
+
+typedef struct ICCDeviceClass {
+    DeviceClass parent_class;
+    int (*init)(ICCDevice *dev);
+} ICCDeviceClass;
+#define TYPE_ICC_DEVICE "icc-device"
+#define ICC_DEVICE(obj) OBJECT_CHECK(ICCDevice, (obj), TYPE_ICC_DEVICE)
+#define ICC_DEVICE_CLASS(klass) \
+     OBJECT_CLASS_CHECK(ICCDeviceClass, (klass), TYPE_ICC_DEVICE)
+#define ICC_DEVICE_GET_CLASS(obj) \
+     OBJECT_GET_CLASS(ICCDeviceClass, (obj), TYPE_ICC_DEVICE)
+
+#define TYPE_ICC_BRIDGE "icc-bridge"
+
+#endif /* CONFIG_USER_ONLY */
+#endif
-- 
1.8.2