[Qemu-devel] [PATCH] hw/pxb: add chassis_nr property

[Marcel Apfelbaum <marcel@redhat.com>]

Add a chassis_nr property Instead of using PXB bus number
as internal bridge's chassis nr.

Suggested-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Marcel Apfelbaum <marcel@redhat.com>
---
 docs/pci_expander_bridge.txt        | 7 +++----
 hw/pci-bridge/pci_expander_bridge.c | 5 ++++-
 2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/docs/pci_expander_bridge.txt b/docs/pci_expander_bridge.txt
index d7913fb..bc5be05 100644
--- a/docs/pci_expander_bridge.txt
+++ b/docs/pci_expander_bridge.txt
@@ -23,9 +23,9 @@ A detailed command line would be:
 -m 2G
 -object memory-backend-ram,size=1024M,policy=bind,host-nodes=0,id=ram-node0 -numa node,nodeid=0,cpus=0,memdev=ram-node0
 -object memory-backend-ram,size=1024M,policy=bind,host-nodes=1,id=ram-node1 -numa node,nodeid=1,cpus=1,memdev=ram-node1
--device pxb,id=bridge1,bus=pci.0,numa_node=1,bus_nr=4 -netdev user,id=nd-device e1000,bus=bridge1,addr=0x4,netdev=nd
--device pxb,id=bridge2,bus=pci.0,numa_node=0,bus_nr=8,bus=pci.0 -device e1000,bus=bridge2,addr=0x3
--device pxb,id=bridge3,bus=pci.0,bus_nr=40,bus=pci.0 -drive if=none,id=drive0,file=[img] -device virtio-blk-pci,drive=drive0,scsi=off,bus=bridge3,addr=1
+-device pxb,id=bridge1,bus=pci.0,numa_node=1,bus_nr=4,chassis_nr=4 -netdev user,id=nd-device e1000,bus=bridge1,addr=0x4,netdev=nd
+-device pxb,id=bridge2,bus=pci.0,numa_node=0,bus_nr=8,bus=pci.0,chassis_nr=8 -device e1000,bus=bridge2,addr=0x3
+-device pxb,id=bridge3,bus=pci.0,bus_nr=40,bus=pci.0,chassis_nr=40 -drive if=none,id=drive0,file=[img] -device virtio-blk-pci,drive=drive0,scsi=off,bus=bridge3,addr=1
 
 Here you have:
  - 2 NUMA nodes for the guest, 0 and 1. (both mapped to the same NUMA node in host, but you can and should put it in different host NUMA nodes)
@@ -55,4 +55,3 @@ The PXB is composed by:
   - Using the bridge will enable hotplug support
   - All the devices behind the bridge will use bridge's IO/MEM windows compacting
     the PCI address space.
-
diff --git a/hw/pci-bridge/pci_expander_bridge.c b/hw/pci-bridge/pci_expander_bridge.c
index ec2bb45..62756d1 100644
--- a/hw/pci-bridge/pci_expander_bridge.c
+++ b/hw/pci-bridge/pci_expander_bridge.c
@@ -38,6 +38,7 @@ typedef struct PXBDev {
     PCIDevice parent_obj;
     /*< public >*/
 
+    uint8_t chassis_nr;
     uint8_t bus_nr;
     uint16_t numa_node;
 } PXBDev;
@@ -175,7 +176,7 @@ static int pxb_dev_initfn(PCIDevice *dev)
 
     bds = qdev_create(BUS(bus), "pci-bridge");
     bds->id = dev_name;
-    qdev_prop_set_uint8(bds, "chassis_nr", pxb->bus_nr);
+    qdev_prop_set_uint8(bds, "chassis_nr", pxb->chassis_nr);
 
     PCI_HOST_BRIDGE(ds)->bus = bus;
 
@@ -194,6 +195,8 @@ static int pxb_dev_initfn(PCIDevice *dev)
 }
 
 static Property pxb_dev_properties[] = {
+    /* Note: 0 is not a legal chassis number. */
+    DEFINE_PROP_UINT8("chassis_nr", PXBDev, chassis_nr, 0),
     /* Note: 0 is not a legal a PXB bus number. */
     DEFINE_PROP_UINT8("bus_nr", PXBDev, bus_nr, 0),
     DEFINE_PROP_UINT16("numa_node", PXBDev, numa_node, NUMA_NODE_UNASSIGNED),
-- 
2.1.0