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pci: deassert intx on reset. 

deassert intx on device reset.
So far pci_device_reset() is used for system reset.
In that case, interrupt controller is reset at the same time so that
all irq is are deasserted.
But now pci bus reset/flr is supported, and in that case irq needs to be
disabled explicitly.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Isaku Yamahata 2011-01-20 16:21:38 +09:00 committed by Michael S. Tsirkin
parent 2991181aaa
commit 4c92325b51
2 changed files with 11 additions and 0 deletions
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9
hw/pci.c
View File

@ -137,6 +137,14 @@ static void pci_update_irq_status(PCIDevice *dev)
}
}
void pci_device_deassert_intx(PCIDevice *dev)
{
int i;
for (i = 0; i < PCI_NUM_PINS; ++i) {
qemu_set_irq(dev->irq[i], 0);
}
}
/*
* This function is called on #RST and FLR.
* FLR if PCI_EXP_DEVCTL_BCR_FLR is set
@ -152,6 +160,7 @@ void pci_device_reset(PCIDevice *dev)
dev->irq_state = 0;
pci_update_irq_status(dev);
pci_device_deassert_intx(dev);
/* Clear all writeable bits */
pci_word_test_and_clear_mask(dev->config + PCI_COMMAND,
pci_get_word(dev->wmask + PCI_COMMAND) |

2
hw/pci.h
View File

@ -264,6 +264,8 @@ void do_pci_info_print(Monitor *mon, const QObject *data);
void do_pci_info(Monitor *mon, QObject **ret_data);
void pci_bridge_update_mappings(PCIBus *b);
void pci_device_deassert_intx(PCIDevice *dev);
static inline void
pci_set_byte(uint8_t *config, uint8_t val)
{