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qemu/pci: reset device registers on bus reset

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Reset BARs and a couple of other registers on bus reset, as per PCI
spec.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Michael S. Tsirkin 2009-09-16 13:41:09 +03:00 committed by Anthony Liguori
parent 5330de099a
commit c0b1905b28
1 changed files with 13 additions and 0 deletions
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13
hw/pci.c
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@ -92,7 +92,20 @@ static inline int pci_bar(int reg)
static void pci_device_reset(PCIDevice *dev) static void pci_device_reset(PCIDevice *dev)
{ {
int r;
memset(dev->irq_state, 0, sizeof dev->irq_state); memset(dev->irq_state, 0, sizeof dev->irq_state);
dev->config[PCI_COMMAND] &= ~(PCI_COMMAND_IO | PCI_COMMAND_MEMORY |
PCI_COMMAND_MASTER);
dev->config[PCI_CACHE_LINE_SIZE] = 0x0;
dev->config[PCI_INTERRUPT_LINE] = 0x0;
for (r = 0; r < PCI_NUM_REGIONS; ++r) {
if (!dev->io_regions[r].size) {
continue;
}
pci_set_long(dev->config + pci_bar(r), dev->io_regions[r].type);
}
pci_update_mappings(dev);
} }
static void pci_bus_reset(void *opaque) static void pci_bus_reset(void *opaque)