[Qemu-devel] [PATCH v6 11/15] spapr_pci: add dynamic-reconfiguration option for spapr-pci-host-bridge

[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-2.3.

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
---
 hw/ppc/spapr.c              | 5 +++++
 hw/ppc/spapr_pci.c          | 2 ++
 include/hw/pci-host/spapr.h | 1 +
 3 files changed, 8 insertions(+)

diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index c967721..7272509 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -1801,6 +1801,11 @@ static const TypeInfo spapr_machine_info = {
             .driver   = TYPE_SPAPR_PCI_HOST_BRIDGE,\
             .property = "mem_win_size",\
             .value    = "0x20000000",\
+        },\
+        {\
+            .driver   = "spapr-pci-host-bridge",\
+            .property = "dynamic-reconfiguration",\
+            .value    = "off",\
         }
 
 #define SPAPR_COMPAT_2_1 \
diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c
index 7d37d83..e6e2f7b 100644
--- a/hw/ppc/spapr_pci.c
+++ b/hw/ppc/spapr_pci.c
@@ -684,6 +684,8 @@ 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 d725f0e..24867b0 100644
--- a/include/hw/pci-host/spapr.h
+++ b/include/hw/pci-host/spapr.h
@@ -67,6 +67,7 @@ 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;
-- 
1.9.1