Introduce accessor function to know INTx levels.
It will be used later by q35.
Although piix_pci tracks the intx line levels, it can be eliminated
by this helper function.
Cc: Michael S. Tsirkin <m...@redhat.com>
Signed-off-by: Isaku Yamahata <yamah...@valinux.co.jp>
---
hw/pci.c | 7 +++++++
hw/pci.h | 1 +
2 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/hw/pci.c b/hw/pci.c
index 8b76cea..6ad3f10 100644
--- a/hw/pci.c
+++ b/hw/pci.c
@@ -126,6 +126,13 @@ static void pci_change_irq_level(PCIDevice *pci_dev, int
irq_num, int change)
bus->set_irq(bus->irq_opaque, irq_num, bus->irq_count[irq_num] != 0);
}
+int pci_bus_get_irq_level(PCIBus *bus, int irq_num)
+{
+ assert(irq_num >= 0);
+ assert(irq_num < bus->nirq);
+ return !!bus->irq_count[irq_num];
+}
+
/* Update interrupt status bit in config space on interrupt
* state change. */
static void pci_update_irq_status(PCIDevice *dev)
diff --git a/hw/pci.h b/hw/pci.h
index 113e556..092a463 100644
--- a/hw/pci.h
+++ b/hw/pci.h
@@ -233,6 +233,7 @@ void pci_bus_new_inplace(PCIBus *bus, DeviceState *parent,
PCIBus *pci_bus_new(DeviceState *parent, const char *name, int devfn_min);
void pci_bus_irqs(PCIBus *bus, pci_set_irq_fn set_irq, pci_map_irq_fn map_irq,
void *irq_opaque, int nirq);
+int pci_bus_get_irq_level(PCIBus *bus, int irq_num);
void pci_bus_hotplug(PCIBus *bus, pci_hotplug_fn hotplug, DeviceState *dev);
PCIBus *pci_register_bus(DeviceState *parent, const char *name,
pci_set_irq_fn set_irq, pci_map_irq_fn map_irq,
--
1.7.1.1
