[PULL v2 47/78] hw/i386/pc: Wire RTC ISA IRQs in south bridges

["Michael S. Tsirkin" <mst@redhat.com>]

From: Bernhard Beschow <shentey@gmail.com>

Makes the south bridges a bit more self-contained and aligns PIIX3 more with
PIIX4. The latter is needed for consolidating the PIIX south bridges.

Signed-off-by: Bernhard Beschow <shentey@gmail.com>
Message-Id: <20231007123843.127151-11-shentey@gmail.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/i386/pc.c      | 7 ++-----
 hw/isa/lpc_ich9.c | 3 +++
 hw/isa/piix3.c    | 3 +++
 3 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 7e6c4dc526..355e1b7cf6 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -1244,12 +1244,9 @@ void pc_basic_device_init(struct PCMachineState *pcms,
         pit_isa_irq = -1;
         pit_alt_irq = qdev_get_gpio_in(hpet, HPET_LEGACY_PIT_INT);
         rtc_irq = qdev_get_gpio_in(hpet, HPET_LEGACY_RTC_INT);
+
+        /* overwrite connection created by south bridge */
         qdev_connect_gpio_out(DEVICE(rtc_state), 0, rtc_irq);
-    } else {
-        uint32_t irq = object_property_get_uint(OBJECT(rtc_state),
-                                                "irq",
-                                                &error_fatal);
-        isa_connect_gpio_out(rtc_state, 0, irq);
     }
 
     object_property_add_alias(OBJECT(pcms), "rtc-time", OBJECT(rtc_state),
diff --git a/hw/isa/lpc_ich9.c b/hw/isa/lpc_ich9.c
index 3fcefc5a8a..23eba64f22 100644
--- a/hw/isa/lpc_ich9.c
+++ b/hw/isa/lpc_ich9.c
@@ -696,6 +696,7 @@ static void ich9_lpc_realize(PCIDevice *d, Error **errp)
     ICH9LPCState *lpc = ICH9_LPC_DEVICE(d);
     PCIBus *pci_bus = pci_get_bus(d);
     ISABus *isa_bus;
+    uint32_t irq;
 
     if ((lpc->smi_host_features & BIT_ULL(ICH9_LPC_SMI_F_CPU_HOT_UNPLUG_BIT)) &&
         !(lpc->smi_host_features & BIT_ULL(ICH9_LPC_SMI_F_CPU_HOTPLUG_BIT))) {
@@ -745,6 +746,8 @@ static void ich9_lpc_realize(PCIDevice *d, Error **errp)
     if (!qdev_realize(DEVICE(&lpc->rtc), BUS(isa_bus), errp)) {
         return;
     }
+    irq = object_property_get_uint(OBJECT(&lpc->rtc), "irq", &error_fatal);
+    isa_connect_gpio_out(ISA_DEVICE(&lpc->rtc), 0, irq);
 
     pci_bus_irqs(pci_bus, ich9_lpc_set_irq, d, ICH9_LPC_NB_PIRQS);
     pci_bus_map_irqs(pci_bus, ich9_lpc_map_irq);
diff --git a/hw/isa/piix3.c b/hw/isa/piix3.c
index 3e7c42fa68..11d72ca2bb 100644
--- a/hw/isa/piix3.c
+++ b/hw/isa/piix3.c
@@ -266,6 +266,7 @@ static void pci_piix3_realize(PCIDevice *dev, Error **errp)
 {
     PIIX3State *d = PIIX3_PCI_DEVICE(dev);
     ISABus *isa_bus;
+    uint32_t irq;
 
     isa_bus = isa_bus_new(DEVICE(d), pci_address_space(dev),
                           pci_address_space_io(dev), errp);
@@ -287,6 +288,8 @@ static void pci_piix3_realize(PCIDevice *dev, Error **errp)
     if (!qdev_realize(DEVICE(&d->rtc), BUS(isa_bus), errp)) {
         return;
     }
+    irq = object_property_get_uint(OBJECT(&d->rtc), "irq", &error_fatal);
+    isa_connect_gpio_out(ISA_DEVICE(&d->rtc), 0, irq);
 }
 
 static void build_pci_isa_aml(AcpiDevAmlIf *adev, Aml *scope)
-- 
MST