[Xen-devel] [PATCH v2 3/4] xen: Add usage of device listener interface for PCI to PCI bridges

[Don Slutz <dslutz@xxxxxxxxxxx>]

Signed-off-by: Don Slutz <dslutz@xxxxxxxxxxx>
CC: Don Slutz <don.slutz@xxxxxxxxx>
---
 include/hw/xen/xen_common.h | 10 ++++++----
 xen-hvm.c                   | 13 ++++++++++++-
 2 files changed, 18 insertions(+), 5 deletions(-)

diff --git a/include/hw/xen/xen_common.h b/include/hw/xen/xen_common.h
index 38f29fb..6579b78 100644
--- a/include/hw/xen/xen_common.h
+++ b/include/hw/xen/xen_common.h
@@ -229,7 +229,8 @@ static inline void xen_map_pcidev(XenXC xc, domid_t dom,
 
 static inline void xen_unmap_pcidev(XenXC xc, domid_t dom,
                                     ioservid_t ioservid,
-                                    PCIDevice *pci_dev)
+                                    PCIDevice *pci_dev,
+                                    uint8_t oldbus)
 {
 }
 
@@ -357,12 +358,13 @@ static inline void xen_map_pcidev(XenXC xc, domid_t dom,
 
 static inline void xen_unmap_pcidev(XenXC xc, domid_t dom,
                                     ioservid_t ioservid,
-                                    PCIDevice *pci_dev)
+                                    PCIDevice *pci_dev,
+                                    uint8_t oldbus)
 {
-    trace_xen_unmap_pcidev(ioservid, pci_bus_num(pci_dev->bus),
+    trace_xen_unmap_pcidev(ioservid, oldbus,
                            PCI_SLOT(pci_dev->devfn), PCI_FUNC(pci_dev->devfn));
     xc_hvm_unmap_pcidev_from_ioreq_server(xc, dom, ioservid,
-                                          0, pci_bus_num(pci_dev->bus),
+                                          0, oldbus,
                                           PCI_SLOT(pci_dev->devfn),
                                           PCI_FUNC(pci_dev->devfn));
 }
diff --git a/xen-hvm.c b/xen-hvm.c
index 42356b8..7b6d8f1 100644
--- a/xen-hvm.c
+++ b/xen-hvm.c
@@ -590,10 +590,20 @@ static void xen_device_unrealize(DeviceListener *listener,
     if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) {
         PCIDevice *pci_dev = PCI_DEVICE(dev);
 
-        xen_unmap_pcidev(xen_xc, xen_domid, state->ioservid, pci_dev);
+        xen_unmap_pcidev(xen_xc, xen_domid, state->ioservid, pci_dev,
+                         pci_bus_num(pci_dev->bus));
     }
 }
 
+static void xen_device_change_pci_bus_num(DeviceListener *listener,
+                                          PCIDevice *pci_dev, uint8_t oldbus)
+{
+    XenIOState *state = container_of(listener, XenIOState, device_listener);
+
+    xen_unmap_pcidev(xen_xc, xen_domid, state->ioservid, pci_dev, oldbus);
+    xen_map_pcidev(xen_xc, xen_domid, state->ioservid, pci_dev);
+}
+
 static void xen_sync_dirty_bitmap(XenIOState *state,
                                   hwaddr start_addr,
                                   ram_addr_t size)
@@ -709,6 +719,7 @@ static MemoryListener xen_io_listener = {
 static DeviceListener xen_device_listener = {
     .realize = xen_device_realize,
     .unrealize = xen_device_unrealize,
+    .change_pci_bus_num = xen_device_change_pci_bus_num,
 };
 
 /* get the ioreq packets from share mem */
-- 
1.8.4


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