[Qemu-devel] [PATCH 26/32] spapr_pci: add dynamic-reconfiguration option for spapr-pci-host-bridge

[David Gibson <david@gibson.dropbear.id.au>]

From: Michael Roth <mdroth@linux.vnet.ibm.com>

This option enables/disables PCI hotplug for a particular PHB.

Also add machine compatibility code to disable it by default for machine
types prior to pseries-2.4.

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
---
 hw/ppc/spapr.c              | 12 ++++++++++--
 hw/ppc/spapr_pci.c          |  2 ++
 include/hw/pci-host/spapr.h |  1 +
 3 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index 2d6d1ca..4d66eef 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -1821,12 +1821,20 @@ static const TypeInfo spapr_machine_info = {
     },
 };
 
+#define SPAPR_COMPAT_2_3 \
+        {\
+            .driver   = "spapr-pci-host-bridge",\
+            .property = "dynamic-reconfiguration",\
+            .value    = "off",\
+        }
+
 #define SPAPR_COMPAT_2_2 \
         {\
             .driver   = TYPE_SPAPR_PCI_HOST_BRIDGE,\
             .property = "mem_win_size",\
             .value    = "0x20000000",\
-        }
+        },\
+        SPAPR_COMPAT_2_3
 
 #define SPAPR_COMPAT_2_1 \
         SPAPR_COMPAT_2_2
@@ -1873,7 +1881,7 @@ static const TypeInfo spapr_machine_2_2_info = {
 static void spapr_machine_2_3_class_init(ObjectClass *oc, void *data)
 {
     static GlobalProperty compat_props[] = {
-        /* SPAPR_COMPAT_2_3, */
+        SPAPR_COMPAT_2_3,
         { /* end of list */ }
     };
     MachineClass *mc = MACHINE_CLASS(oc);
diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c
index 52c5c73..a2dcc6a 100644
--- a/hw/ppc/spapr_pci.c
+++ b/hw/ppc/spapr_pci.c
@@ -936,6 +936,8 @@ static Property spapr_phb_properties[] = {
     DEFINE_PROP_UINT64("io_win_addr", sPAPRPHBState, io_win_addr, -1),
     DEFINE_PROP_UINT64("io_win_size", sPAPRPHBState, io_win_size,
                        SPAPR_PCI_IO_WIN_SIZE),
+    DEFINE_PROP_BOOL("dynamic-reconfiguration", sPAPRPHBState, dr_enabled,
+                     true),
     DEFINE_PROP_END_OF_LIST(),
 };
 
diff --git a/include/hw/pci-host/spapr.h b/include/hw/pci-host/spapr.h
index 5b497ce..9dca388 100644
--- a/include/hw/pci-host/spapr.h
+++ b/include/hw/pci-host/spapr.h
@@ -71,6 +71,7 @@ struct sPAPRPHBState {
     uint32_t index;
     uint64_t buid;
     char *dtbusname;
+    bool dr_enabled;
 
     MemoryRegion memspace, iospace;
     hwaddr mem_win_addr, mem_win_size, io_win_addr, io_win_size;
-- 
2.1.0