[Qemu-devel] [PATCH 01/10] convert RTC as piix3 proper QOM child

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

convert RTC as piix3 proper QOM child.

RTC 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/mc146818rtc.c |   29 +----------------------------
 hw/mc146818rtc.h |   30 ++++++++++++++++++++++++++++++
 hw/pc.c          |   13 +++++++------
 hw/piix3.c       |   14 ++++++++++++++
 hw/piix3.h       |    5 +++++
 5 files changed, 57 insertions(+), 34 deletions(-)

diff --git a/hw/mc146818rtc.c b/hw/mc146818rtc.c
index 98839f2..f385f4c 100644
--- a/hw/mc146818rtc.c
+++ b/hw/mc146818rtc.c
@@ -56,33 +56,6 @@
 #define RTC_CLOCK_RATE            32768
 #define UIP_HOLD_LENGTH           (8 * NSEC_PER_SEC / 32768)
 
-typedef struct RTCState {
-    ISADevice dev;
-    MemoryRegion io;
-    uint8_t cmos_data[128];
-    uint8_t cmos_index;
-    int32_t base_year;
-    uint64_t base_rtc;
-    uint64_t last_update;
-    int64_t offset;
-    qemu_irq irq;
-    qemu_irq sqw_irq;
-    int it_shift;
-    /* periodic timer */
-    QEMUTimer *periodic_timer;
-    int64_t next_periodic_time;
-    /* update-ended timer */
-    QEMUTimer *update_timer;
-    uint64_t next_alarm_time;
-    uint16_t irq_reinject_on_ack_count;
-    uint32_t irq_coalesced;
-    uint32_t period;
-    QEMUTimer *coalesced_timer;
-    Notifier clock_reset_notifier;
-    LostTickPolicy lost_tick_policy;
-    Notifier suspend_notifier;
-} RTCState;
-
 static void rtc_set_time(RTCState *s);
 static void rtc_update_time(RTCState *s);
 static void rtc_set_cmos(RTCState *s, const struct tm *tm);
@@ -894,7 +867,7 @@ static void rtc_class_initfn(ObjectClass *klass, void *data)
 }
 
 static TypeInfo mc146818rtc_info = {
-    .name          = "mc146818rtc",
+    .name          = TYPE_RTC,
     .parent        = TYPE_ISA_DEVICE,
     .instance_size = sizeof(RTCState),
     .class_init    = rtc_class_initfn,
diff --git a/hw/mc146818rtc.h b/hw/mc146818rtc.h
index f286b6a..a8f1428 100644
--- a/hw/mc146818rtc.h
+++ b/hw/mc146818rtc.h
@@ -3,6 +3,36 @@
 
 #include "isa.h"
 #include "mc146818rtc_regs.h"
+#include "notify.h"
+
+#define TYPE_RTC "mc146818rtc"
+
+typedef struct RTCState {
+    ISADevice dev;
+    MemoryRegion io;
+    uint8_t cmos_data[128];
+    uint8_t cmos_index;
+    int32_t base_year;
+    uint64_t base_rtc;
+    uint64_t last_update;
+    int64_t offset;
+    qemu_irq irq;
+    qemu_irq sqw_irq;
+    int it_shift;
+    /* periodic timer */
+    QEMUTimer *periodic_timer;
+    int64_t next_periodic_time;
+    /* update-ended timer */
+    QEMUTimer *update_timer;
+    uint64_t next_alarm_time;
+    uint16_t irq_reinject_on_ack_count;
+    uint32_t irq_coalesced;
+    uint32_t period;
+    QEMUTimer *coalesced_timer;
+    Notifier clock_reset_notifier;
+    LostTickPolicy lost_tick_policy;
+    Notifier suspend_notifier;
+} RTCState;
 
 ISADevice *rtc_init(ISABus *bus, int base_year, qemu_irq intercept_irq);
 void rtc_set_memory(ISADevice *dev, int addr, int val);
diff --git a/hw/pc.c b/hw/pc.c
index c40e112..7fed363 100644
--- a/hw/pc.c
+++ b/hw/pc.c
@@ -90,6 +90,8 @@ struct e820_table {
     struct e820_entry entry[E820_NR_ENTRIES];
 } QEMU_PACKED __attribute((__aligned__(4)));
 
+qemu_irq rtc_irq;
+
 static const int ide_iobase[MAX_IDE_BUS] = { 0x1f0, 0x170 };
 static const int ide_iobase2[MAX_IDE_BUS] = { 0x3f6, 0x376 };
 static const int ide_irq[MAX_IDE_BUS] = { 14, 15 };
@@ -941,7 +943,6 @@ static void cpu_request_exit(void *opaque, int irq, int level)
 }
 
 static void pc_basic_device_init(ISABus *isa_bus, qemu_irq *gsi,
-                          ISADevice **rtc_state,
                           ISADevice **floppy,
                           bool no_vmport)
 {
@@ -950,7 +951,6 @@ static void pc_basic_device_init(ISABus *isa_bus, qemu_irq *gsi,
     DeviceState *hpet = NULL;
     int pit_isa_irq = 0;
     qemu_irq pit_alt_irq = NULL;
-    qemu_irq rtc_irq = NULL;
     qemu_irq *a20_line;
     ISADevice *i8042, *port92, *vmmouse, *pit = NULL;
     qemu_irq *cpu_exit_irq;
@@ -977,9 +977,6 @@ static void pc_basic_device_init(ISABus *isa_bus, qemu_irq *gsi,
             rtc_irq = qdev_get_gpio_in(hpet, HPET_LEGACY_RTC_INT);
         }
     }
-    *rtc_state = rtc_init(isa_bus, 2000, rtc_irq);
-
-    qemu_register_boot_set(pc_boot_set, *rtc_state);
 
     if (!xen_enabled()) {
         if (kvm_irqchip_in_kernel()) {
@@ -1237,7 +1234,7 @@ static void pc_init1(MemoryRegion *system_memory,
     }
 
     /* init basic PC hardware */
-    pc_basic_device_init(isa_bus, gsi, &rtc_state, &floppy, xen_enabled());
+    pc_basic_device_init(isa_bus, gsi, &floppy, xen_enabled());
 
     for (i = 0; i < nb_nics; i++) {
         NICInfo *nd = &nd_table[i];
@@ -1269,6 +1266,10 @@ static void pc_init1(MemoryRegion *system_memory,
         }
     }
 
+    /* FIXME */
+    rtc_state = ISA_DEVICE(object_resolve_path("rtc", NULL));
+    qemu_register_boot_set(pc_boot_set, rtc_state);
+
     audio_init(isa_bus, pci_enabled ? pci_bus : NULL);
 
     pc_cmos_init(below_4g_mem_size, above_4g_mem_size, boot_device,
diff --git a/hw/piix3.c b/hw/piix3.c
index 7d4145f..a40c8cd 100644
--- a/hw/piix3.c
+++ b/hw/piix3.c
@@ -198,6 +198,17 @@ static int piix3_realize(PCIDevice *dev)
     s->bus = isa_bus_new(DEVICE(dev), pci_address_space_io(dev));
     isa_bus_irqs(s->bus, s->pic);
 
+    /* Realize the RTC */
+    qdev_set_parent_bus(DEVICE(&s->rtc), BUS(s->bus));
+    qdev_init_nofail(DEVICE(&s->rtc));
+
+    /* Setup the RTC IRQ */
+    if (!no_hpet && (!kvm_irqchip_in_kernel() || kvm_has_pit_state2())) {
+        s->rtc.irq = rtc_irq;
+    } else {
+        isa_init_irq(ISA_DEVICE(&s->rtc), &rtc_irq, RTC_ISA_IRQ);
+    }
+
     return 0;
 }
 
@@ -208,6 +219,9 @@ static void piix3_initfn(Object *obj)
     qdev_prop_set_int32(DEVICE(s), "addr", PCI_DEVFN(1, 0));
     qdev_prop_set_bit(DEVICE(s), "multifunction", true);
 
+    object_initialize(&s->rtc, TYPE_RTC);
+    object_property_add_child(obj, "rtc", OBJECT(&s->rtc), NULL);
+    qdev_prop_set_int32(DEVICE(&s->rtc), "base_year", 2000);
 }
 
 static void piix3_class_init(ObjectClass *klass, void *data)
diff --git a/hw/piix3.h b/hw/piix3.h
index 0fb04f2..23ee74a 100644
--- a/hw/piix3.h
+++ b/hw/piix3.h
@@ -30,6 +30,7 @@
 #define QEMU_PIIX3_H
 
 #include "pci.h"
+#include "mc146818rtc.h"
 
 #define PIIX_NUM_PIC_IRQS       16      /* i8259 * 2 */
 #define PIIX_NUM_PIRQS          4ULL    /* PIRQ[A-D] */
@@ -58,6 +59,8 @@ typedef struct PIIX3State {
 
     ISABus *bus;
 
+    RTCState rtc;
+
     qemu_irq *pic;
 
     /* This member isn't used. Just for save/load compatibility */
@@ -70,4 +73,6 @@ void piix3_set_irq_level(PIIX3State *piix3, int pirq, int level);
 
 void piix3_set_irq(void *opaque, int pirq, int level);
 
+extern qemu_irq rtc_irq;
+
 #endif
-- 
1.7.7.6