[PATCH v6 38/79] s390x/s390-virtio-ccw: use memdev for RAM

[Igor Mammedov]

memory_region_allocate_system_memory() API is going away, so
replace it with memdev allocated MemoryRegion. The later is
initialized by generic code, so board only needs to opt in
to memdev scheme by providing
  MachineClass::default_ram_id
and using MachineState::ram instead of manually initializing
RAM memory region.

Signed-off-by: Igor Mammedov <address@hidden>
Reviewed-by: Philippe Mathieu-Daudé <address@hidden>
Reviewed-by: David Hildenbrand <address@hidden>
Acked-by: Cornelia Huck <address@hidden>
Tested-by: Halil Pasic <address@hidden>
Acked-by: Halil Pasic <address@hidden>
Reviewed-by: Richard Henderson <address@hidden>
---
 hw/s390x/s390-virtio-ccw.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c
index e759eb5f83..a89cf4c129 100644
--- a/hw/s390x/s390-virtio-ccw.c
+++ b/hw/s390x/s390-virtio-ccw.c
@@ -154,14 +154,12 @@ static void virtio_ccw_register_hcalls(void)
                                    virtio_ccw_hcall_early_printk);
 }
 
-static void s390_memory_init(ram_addr_t mem_size)
+static void s390_memory_init(MemoryRegion *ram)
 {
     MemoryRegion *sysmem = get_system_memory();
-    MemoryRegion *ram = g_new(MemoryRegion, 1);
     Error *local_err = NULL;
 
     /* allocate RAM for core */
-    memory_region_allocate_system_memory(ram, NULL, "s390.ram", mem_size);
     memory_region_add_subregion(sysmem, 0, ram);
 
     /*
@@ -245,7 +243,7 @@ static void ccw_init(MachineState *machine)
 
     s390_sclp_init();
     /* init memory + setup max page size. Required for the CPU model */
-    s390_memory_init(machine->ram_size);
+    s390_memory_init(machine->ram);
 
     /* init CPUs (incl. CPU model) early so s390_has_feature() works */
     s390_init_cpus(machine);
@@ -471,6 +469,7 @@ static void ccw_machine_class_init(ObjectClass *oc, void 
*data)
     hc->plug = s390_machine_device_plug;
     hc->unplug_request = s390_machine_device_unplug_request;
     nc->nmi_monitor_handler = s390_nmi;
+    mc->default_ram_id = "s390.ram";
 }
 
 static inline bool machine_get_aes_key_wrap(Object *obj, Error **errp)
-- 
2.18.1