Re: [PATCH v2 10/86] arm:aspeed: use memdev for RAM

[Philippe Mathieu-Daudé]

On 1/16/20 10:24 AM, Cédric Le Goater wrote:
On 1/15/20 4:06 PM, Igor Mammedov wrote:
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: Cédric Le Goater <c...@kaod.org>


We need to check 'max_ram' is still needed. I remember that old firmwares
were testing the RAM size by doing write/read checks at the top of the RAM.
This was breaking QEMU sometime ago.

Do you remember any version we can use to test this? Also add to our 
acceptance tests.

C.

---
CC: c...@kaod.org
CC: peter.mayd...@linaro.org
CC: and...@aj.id.au
CC: j...@jms.id.au
CC: qemu-...@nongnu.org
---
  hw/arm/aspeed.c | 5 ++---
  1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/hw/arm/aspeed.c b/hw/arm/aspeed.c
index 525c547..330254b 100644
--- a/hw/arm/aspeed.c
+++ b/hw/arm/aspeed.c
@@ -35,7 +35,6 @@ static struct arm_boot_info aspeed_board_binfo = {
  struct AspeedBoardState {
      AspeedSoCState soc;
      MemoryRegion ram_container;
-    MemoryRegion ram;
      MemoryRegion max_ram;
  };
  
@@ -184,6 +183,7 @@ static void aspeed_machine_init(MachineState *machine)
  
      memory_region_init(&bmc->ram_container, NULL, "aspeed-ram-container",
                         UINT32_MAX);
+    memory_region_add_subregion(&bmc->ram_container, 0, machine->ram);
  
      object_initialize_child(OBJECT(machine), "soc", &bmc->soc,
                              (sizeof(bmc->soc)), amc->soc_name, &error_abort,
@@ -215,8 +215,6 @@ static void aspeed_machine_init(MachineState *machine)
      object_property_set_bool(OBJECT(&bmc->soc), true, "realized",
                               &error_fatal);
  
-    memory_region_allocate_system_memory(&bmc->ram, NULL, "ram", ram_size);
-    memory_region_add_subregion(&bmc->ram_container, 0, &bmc->ram);
      memory_region_add_subregion(get_system_memory(),
                                  sc->memmap[ASPEED_SDRAM],
                                  &bmc->ram_container);
@@ -393,6 +391,7 @@ static void aspeed_machine_class_init(ObjectClass *oc, void 
*data)
      mc->no_floppy = 1;
      mc->no_cdrom = 1;
      mc->no_parallel = 1;
+    mc->default_ram_id = "ram";
  }
  
  static void aspeed_machine_palmetto_class_init(ObjectClass *oc, void *data)