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pci: add pci_for_each_bus_depth_first

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Useful for ACPI hotplug.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Michael S. Tsirkin 2013-10-14 18:01:07 +03:00
parent 4d25299cb2
commit eb0acfdde6
2 changed files with 42 additions and 0 deletions
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28
hw/pci/pci.c
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@ -1704,6 +1704,34 @@ static PCIBus *pci_find_bus_nr(PCIBus *bus, int bus_num)
return NULL;
}
void pci_for_each_bus_depth_first(PCIBus *bus,
void *(*begin)(PCIBus *bus, void *parent_state),
void (*end)(PCIBus *bus, void *state),
void *parent_state)
{
PCIBus *sec;
void *state;
if (!bus) {
return;
}
if (begin) {
state = begin(bus, parent_state);
} else {
state = parent_state;
}
QLIST_FOREACH(sec, &bus->child, sibling) {
pci_for_each_bus_depth_first(sec, begin, end, state);
}
if (end) {
end(bus, state);
}
}
PCIDevice *pci_find_device(PCIBus *bus, int bus_num, uint8_t devfn)
{
bus = pci_find_bus_nr(bus, bus_num);