[Qemu-ppc] [PATCH 06/15] spapr: enable PHB hotplug for default pseries machine type

[Greg Kurz]

From: Michael Roth <address@hidden>

The 'dr_phb_enabled' field of that class can be set as part of
machine-specific init code. It will be used to conditionally
enable creation of DRC objects and device-tree description to
facilitate hotplug of PHBs.

Since we can't migrate this state to older machine types,
default the option to true and disable it for older machine
types.

Signed-off-by: Michael Roth <address@hidden>
Signed-off-by: Greg Kurz <address@hidden>
---
 hw/ppc/spapr.c         |    2 ++
 include/hw/ppc/spapr.h |    1 +
 2 files changed, 3 insertions(+)

diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index 1f17b5d01f4f..621006eaa862 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -4011,6 +4011,7 @@ static void spapr_machine_class_init(ObjectClass *oc, 
void *data)
     smc->default_caps.caps[SPAPR_CAP_NESTED_KVM_HV] = SPAPR_CAP_OFF;
     spapr_caps_add_properties(smc, &error_abort);
     smc->irq = &spapr_irq_xics;
+    smc->dr_phb_enabled = true;
 }
 
 static const TypeInfo spapr_machine_info = {
@@ -4079,6 +4080,7 @@ static void spapr_machine_3_1_class_options(MachineClass 
*mc)
     SET_MACHINE_COMPAT(mc, SPAPR_COMPAT_3_1);
     mc->default_cpu_type = POWERPC_CPU_TYPE_NAME("power8_v2.0");
     smc->update_dt_enabled = false;
+    smc->dr_phb_enabled = false;
 }
 
 DEFINE_SPAPR_MACHINE(3_1, "3.1", false);
diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h
index 36033b89d31a..e96deefa30de 100644
--- a/include/hw/ppc/spapr.h
+++ b/include/hw/ppc/spapr.h
@@ -104,6 +104,7 @@ struct sPAPRMachineClass {
     /*< public >*/
     bool dr_lmb_enabled;       /* enable dynamic-reconfig/hotplug of LMBs */
     bool update_dt_enabled;    /* enable KVMPPC_H_UPDATE_DT */
+    bool dr_phb_enabled;       /* enable dynamic-reconfig/hotplug of PHBs */
     bool use_ohci_by_default;  /* use USB-OHCI instead of XHCI */
     bool pre_2_10_has_unused_icps;
     bool legacy_irq_allocation;