[PATCH 05/13] ppc/pnv: Introduce PnvMachineClass::dt_power_mgt()

[Greg Kurz <groug@kaod.org>]

We add an extra node to advertise power management on some machines,
namely powernv9 and powernv10. This is achieved by using the
pnv_is_power9() and pnv_is_power10() helpers.

This can be achieved with QOM. Add a method to the base class for
powernv machines and have it implemented by machine types that
support power management instead.

Signed-off-by: Greg Kurz <groug@kaod.org>
---
 hw/ppc/pnv.c         |   10 ++++++----
 include/hw/ppc/pnv.h |    8 ++++++--
 2 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/hw/ppc/pnv.c b/hw/ppc/pnv.c
index 5ac149b149d8..efc00f4cb67a 100644
--- a/hw/ppc/pnv.c
+++ b/hw/ppc/pnv.c
@@ -472,7 +472,7 @@ static void pnv_dt_isa(PnvMachineState *pnv, void *fdt)
                        &args);
 }
 
-static void pnv_dt_power_mgt(void *fdt)
+static void pnv_dt_power_mgt(PnvMachineState *pnv, void *fdt)
 {
     int off;
 
@@ -540,9 +540,9 @@ static void *pnv_dt_create(MachineState *machine)
         pnv_dt_bmc_sensors(pnv->bmc, fdt);
     }
 
-    /* Create an extra node for power management on Power9 and Power10 */
-    if (pnv_is_power9(pnv) || pnv_is_power10(pnv)) {
-        pnv_dt_power_mgt(fdt);
+    /* Create an extra node for power management on machines that support it */
+    if (pmc->dt_power_mgt) {
+        pmc->dt_power_mgt(pnv, fdt);
     }
 
     return fdt;
@@ -1710,6 +1710,7 @@ static void pnv_machine_power9_class_init(ObjectClass *oc, void *data)
 
     pmc->compat = compat;
     pmc->compat_size = sizeof(compat);
+    pmc->dt_power_mgt = pnv_dt_power_mgt;
 }
 
 static void pnv_machine_power10_class_init(ObjectClass *oc, void *data)
@@ -1723,6 +1724,7 @@ static void pnv_machine_power10_class_init(ObjectClass *oc, void *data)
 
     pmc->compat = compat;
     pmc->compat_size = sizeof(compat);
+    pmc->dt_power_mgt = pnv_dt_power_mgt;
 }
 
 static void pnv_machine_class_init(ObjectClass *oc, void *data)
diff --git a/include/hw/ppc/pnv.h b/include/hw/ppc/pnv.h
index d534746bd493..8a42c199b65c 100644
--- a/include/hw/ppc/pnv.h
+++ b/include/hw/ppc/pnv.h
@@ -190,6 +190,8 @@ PowerPCCPU *pnv_chip_find_cpu(PnvChip *chip, uint32_t pir);
 #define PNV_MACHINE_CLASS(klass) \
     OBJECT_CLASS_CHECK(PnvMachineClass, klass, TYPE_PNV_MACHINE)
 
+typedef struct PnvMachineState PnvMachineState;
+
 typedef struct PnvMachineClass {
     /*< private >*/
     MachineClass parent_class;
@@ -197,9 +199,11 @@ typedef struct PnvMachineClass {
     /*< public >*/
     const char *compat;
     int compat_size;
+
+    void (*dt_power_mgt)(PnvMachineState *pnv, void *fdt);
 } PnvMachineClass;
 
-typedef struct PnvMachineState {
+struct PnvMachineState {
     /*< private >*/
     MachineState parent_obj;
 
@@ -216,7 +220,7 @@ typedef struct PnvMachineState {
     Notifier     powerdown_notifier;
 
     PnvPnor      *pnor;
-} PnvMachineState;
+};
 
 static inline bool pnv_chip_is_power9(const PnvChip *chip)
 {