[Qemu-devel] [PATCH 03/10] convert PIT as piix3 proper QOM child

[Wanpeng Li <liwanp@linux.vnet.ibm.com>]

convert PIT as piix3 proper QOM child.

PIT creation for the PIIX3 is done by calling object_init() with
qdev_init() being called for each child device in the PIIX3 ::init
function.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Wanpeng Li <liwanp@linux.vnet.ibm.com>

---
 hw/i8254.c          |    2 +-
 hw/i8254_internal.h |    3 ++-
 hw/kvm/i8254.c      |    8 +-------
 hw/pc.c             |   18 +-----------------
 hw/piix3.c          |   34 ++++++++++++++++++++++++++++++++++
 hw/piix3.h          |   15 +++++++++++++++
 6 files changed, 54 insertions(+), 26 deletions(-)

diff --git a/hw/i8254.c b/hw/i8254.c
index bea5f92..8d3616d 100644
--- a/hw/i8254.c
+++ b/hw/i8254.c
@@ -348,7 +348,7 @@ static void pit_class_initfn(ObjectClass *klass, void *data)
 }
 
 static TypeInfo pit_info = {
-    .name          = "isa-pit",
+    .name          = TYPE_PIT,
     .parent        = TYPE_PIT_COMMON,
     .instance_size = sizeof(PITCommonState),
     .class_init    = pit_class_initfn,
diff --git a/hw/i8254_internal.h b/hw/i8254_internal.h
index 686f0c2..1aecad3 100644
--- a/hw/i8254_internal.h
+++ b/hw/i8254_internal.h
@@ -26,7 +26,6 @@
 #define QEMU_I8254_INTERNAL_H
 
 #include "hw.h"
-#include "pc.h"
 #include "isa.h"
 
 typedef struct PITChannelState {
@@ -57,6 +56,8 @@ typedef struct PITCommonState {
     PITChannelState channels[3];
 } PITCommonState;
 
+#define TYPE_KVM_PIT "kvm-pit"
+#define TYPE_PIT "isa-pit"
 #define TYPE_PIT_COMMON "pit-common"
 #define PIT_COMMON(obj) \
      OBJECT_CHECK(PITCommonState, (obj), TYPE_PIT_COMMON)
diff --git a/hw/kvm/i8254.c b/hw/kvm/i8254.c
index 53d13e3..9f8fb7c 100644
--- a/hw/kvm/i8254.c
+++ b/hw/kvm/i8254.c
@@ -27,18 +27,12 @@
 #include "hw/i8254.h"
 #include "hw/i8254_internal.h"
 #include "kvm.h"
+#include "hw/piix3.h"
 
 #define KVM_PIT_REINJECT_BIT 0
 
 #define CALIBRATION_ROUNDS   3
 
-typedef struct KVMPITState {
-    PITCommonState pit;
-    LostTickPolicy lost_tick_policy;
-    bool vm_stopped;
-    int64_t kernel_clock_offset;
-} KVMPITState;
-
 static int64_t abs64(int64_t v)
 {
     return v < 0 ? -v : v;
diff --git a/hw/pc.c b/hw/pc.c
index 7105f4e..80b437f 100644
--- a/hw/pc.c
+++ b/hw/pc.c
@@ -946,30 +946,14 @@ static void pc_basic_device_init(ISABus *isa_bus, qemu_irq *gsi,
 {
     int i;
     DriveInfo *fd[MAX_FD];
-    DeviceState *hpet = NULL;
-    int pit_isa_irq = 0;
-    qemu_irq pit_alt_irq = NULL;
     qemu_irq *a20_line;
-    ISADevice *i8042, *port92, *vmmouse, *pit = NULL;
+    ISADevice *i8042, *port92, *vmmouse;
     qemu_irq *cpu_exit_irq;
 
     register_ioport_write(0x80, 1, 1, ioport80_write, NULL);
 
     register_ioport_write(0xf0, 1, 1, ioportF0_write, NULL);
 
-    if (!xen_enabled()) {
-        if (kvm_irqchip_in_kernel()) {
-            pit = kvm_pit_init(isa_bus, 0x40);
-        } else {
-            pit = pit_init(isa_bus, 0x40, pit_isa_irq, pit_alt_irq);
-        }
-        if (hpet) {
-            /* connect PIT to output control line of the HPET */
-            qdev_connect_gpio_out(hpet, 0, qdev_get_gpio_in(&pit->qdev, 0));
-        }
-        pcspk_init(isa_bus, pit);
-    }
-
     for(i = 0; i < MAX_SERIAL_PORTS; i++) {
         if (serial_hds[i]) {
             serial_isa_init(isa_bus, i, serial_hds[i]);
diff --git a/hw/piix3.c b/hw/piix3.c
index 5fe41cd..41739bd 100644
--- a/hw/piix3.c
+++ b/hw/piix3.c
@@ -194,6 +194,8 @@ static int piix3_realize(PCIDevice *dev)
 {
     PIIX3State *s = PIIX3(dev);
     qemu_irq rtc_irq;
+    int pit_isa_irq = 0;
+    qemu_irq pit_alt_irq = NULL;
 
     /* Initialize ISA Bus */
     s->bus = isa_bus_new(DEVICE(dev), pci_address_space_io(dev));
@@ -222,6 +224,8 @@ static int piix3_realize(PCIDevice *dev)
             sysbus_connect_irq(SYS_BUS_DEVICE(&s->hpet), i, s->pic[i]);
         }
 
+        pit_isa_irq = -1;
+        pit_alt_irq = qdev_get_gpio_in(DEVICE(&s->hpet), HPET_LEGACY_PIT_INT);
         rtc_irq = qdev_get_gpio_in(DEVICE(&s->hpet), HPET_LEGACY_RTC_INT);
     } else {
         isa_init_irq(ISA_DEVICE(&s->rtc), &rtc_irq, RTC_ISA_IRQ);
@@ -230,6 +234,23 @@ static int piix3_realize(PCIDevice *dev)
     /* Setup the RTC IRQ */
     s->rtc.irq = rtc_irq;
 
+    /* Realize the PIT */
+    if (!xen_enabled()) {
+        if (kvm_irqchip_in_kernel()) {
+            qdev_set_parent_bus(DEVICE(&s->pit.kvm_pit), BUS(s->bus));
+            qdev_init_nofail(DEVICE(&s->pit.kvm_pit));
+            qdev_connect_gpio_out(DEVICE(&s->hpet), 0,
+                            qdev_get_gpio_in(DEVICE(&s->pit.kvm_pit), 0));
+        } else {
+            qdev_set_parent_bus(DEVICE(&s->pit), BUS(s->bus));
+            qdev_init_nofail(DEVICE(&s->pit));
+            qdev_connect_gpio_out(DEVICE(&s->pit), 0, pit_isa_irq >= 0 ?
+                 isa_get_irq(ISA_DEVICE(&s->pit), pit_isa_irq) : pit_alt_irq);
+            qdev_connect_gpio_out(DEVICE(&s->hpet), 0,
+            qdev_get_gpio_in(DEVICE(&s->pit), 0));
+        }
+    }
+
     return 0;
 }
 
@@ -246,6 +267,19 @@ static void piix3_initfn(Object *obj)
 
     object_initialize(&s->hpet, TYPE_HPET);
     object_property_add_child(obj, "hpet", OBJECT(&s->hpet), NULL);
+
+    if (!xen_enabled()) {
+        if (kvm_irqchip_in_kernel()) {
+            object_initialize(&s->pit.kvm_pit, TYPE_KVM_PIT);
+            object_property_add_child(obj, "kvm-pit",
+                                          OBJECT(&s->pit.kvm_pit), NULL);
+            qdev_prop_set_int32(DEVICE(&s->pit.kvm_pit), "iobase", 0x40);
+        } else {
+            object_initialize(&s->pit, TYPE_PIT);
+            object_property_add_child(obj, "pit", OBJECT(&s->pit), NULL);
+            qdev_prop_set_int32(DEVICE(&s->pit), "iobase", 0x40);
+       }
+    }
 }
 
 static void piix3_class_init(ObjectClass *klass, void *data)
diff --git a/hw/piix3.h b/hw/piix3.h
index ef22c03..58486b9 100644
--- a/hw/piix3.h
+++ b/hw/piix3.h
@@ -32,6 +32,8 @@
 #include "pci.h"
 #include "mc146818rtc.h"
 #include "hpet_emul.h"
+#include "i8254.h"
+#include "i8254_internal.h"
 
 #define PIIX_NUM_PIC_IRQS       16      /* i8259 * 2 */
 #define PIIX_NUM_PIRQS          4ULL    /* PIRQ[A-D] */
@@ -41,6 +43,13 @@
 #define TYPE_PIIX3 "PIIX3"
 #define PIIX3(obj) OBJECT_CHECK(PIIX3State, (obj), TYPE_PIIX3)
 
+typedef struct KVMPITState {
+     PITCommonState pit;
+     LostTickPolicy lost_tick_policy;
+     bool vm_stopped;
+     int64_t kernel_clock_offset;
+} KVMPITState;
+
 typedef struct PIIX3State {
     PCIDevice dev;
 
@@ -62,6 +71,12 @@ typedef struct PIIX3State {
 
     RTCState rtc;
     HPETState hpet;
+#if !defined(CONFIG_XEN_BACKEND) && defined(CONFIG_NO_XEN)
+    union {
+        PITCommonState pit;
+        KVMPITState kvm_pit;
+    } pit;
+#endif
 
     qemu_irq *pic;
 
-- 
1.7.7.6