pci-hotplug: make them aware of pci domain.

add helper function which converts root bus to pci domain.
make them aware of pci domain.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

1 files changed, 21 insertions, 1 deletions

diff --git a/hw/pci.c b/hw/pci.c
index 3362842bf2..f084cc0285 100644
--- a/hw/pci.c
+++ b/hw/pci.c
@@ -200,6 +200,26 @@ PCIBus *pci_find_root_bus(int domain)
     return NULL;
 }
 
+int pci_find_domain(const PCIBus *bus)
+{
+    PCIDevice *d;
+    struct PCIHostBus *host;
+
+    /* obtain root bus */
+    while ((d = bus->parent_dev) != NULL) {
+        bus = d->bus;
+    }
+
+    QLIST_FOREACH(host, &host_buses, next) {
+        if (host->bus == bus) {
+            return host->domain;
+        }
+    }
+
+    abort();    /* should not be reached */
+    return -1;
+}
+
 void pci_bus_new_inplace(PCIBus *bus, DeviceState *parent,
                          const char *name, int devfn_min)
 {
@@ -505,7 +525,7 @@ PCIBus *pci_get_bus_devfn(int *devfnp, const char *devaddr)
     }
 
     *devfnp = slot << 3;
-    return pci_find_bus(pci_find_root_bus(0), bus);
+    return pci_find_bus(pci_find_root_bus(dom), bus);
 }
 
 static void pci_init_cmask(PCIDevice *dev)