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 <imamm...@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <phi...@redhat.com>
---
CC: peter.mayd...@linaro.org
CC: qemu-...@nongnu.org
CC: radoslaw.bierna...@linaro.org
CC: leif.lindh...@linaro.org
---
 hw/arm/sbsa-ref.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/hw/arm/sbsa-ref.c b/hw/arm/sbsa-ref.c
index 9b5bcb5..1cba9fc 100644
--- a/hw/arm/sbsa-ref.c
+++ b/hw/arm/sbsa-ref.c
@@ -593,7 +593,6 @@ static void sbsa_ref_init(MachineState *machine)
     MachineClass *mc = MACHINE_GET_CLASS(machine);
     MemoryRegion *sysmem = get_system_memory();
     MemoryRegion *secure_sysmem = g_new(MemoryRegion, 1);
-    MemoryRegion *ram = g_new(MemoryRegion, 1);
     bool firmware_loaded;
     const CPUArchIdList *possible_cpus;
     int n, sbsa_max_cpus;
@@ -685,9 +684,8 @@ static void sbsa_ref_init(MachineState *machine)
         object_unref(cpuobj);
     }
 
-    memory_region_allocate_system_memory(ram, NULL, "sbsa-ref.ram",
-                                         machine->ram_size);
-    memory_region_add_subregion(sysmem, sbsa_ref_memmap[SBSA_MEM].base, ram);
+    memory_region_add_subregion(sysmem, sbsa_ref_memmap[SBSA_MEM].base,
+                                machine->ram);
 
     create_fdt(sms);
 
@@ -785,6 +783,7 @@ static void sbsa_ref_class_init(ObjectClass *oc, void *data)
     mc->block_default_type = IF_IDE;
     mc->no_cdrom = 1;
     mc->default_ram_size = 1 * GiB;
+    mc->default_ram_id = "sbsa-ref.ram";
     mc->default_cpus = 4;
     mc->possible_cpu_arch_ids = sbsa_ref_possible_cpu_arch_ids;
     mc->cpu_index_to_instance_props = sbsa_ref_cpu_index_to_props;
-- 
2.7.4


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