Re: [PATCH v2 1/8] hw/arm/aspeed: Correct DRAM container region size

[Cédric Le Goater <clg@xxxxxxxx>]

On 6/1/20 4:29 PM, Philippe Mathieu-Daudé wrote:
> memory_region_set_size() handle the 16 Exabytes limit by
> special-casing the UINT64_MAX value. This is not a problem
> for the 32-bit maximum, 4 GiB.
> By using the UINT32_MAX value, the aspeed-ram-container
> MemoryRegion ends up missing 1 byte:
> 
>  $ qemu-system-arm -M ast2600-evb -S -monitor stdio
>  (qemu) info mtree
> 
>   address-space: aspeed.fmc-ast2600-dma-dram
>     0000000080000000-000000017ffffffe (prio 0, i/o): aspeed-ram-container
>       0000000080000000-00000000bfffffff (prio 0, ram): ram
>       00000000c0000000-ffffffffffffffff (prio 0, i/o): max_ram
> 
> Fix by using the correct value. We now have:
> 
>   address-space: aspeed.fmc-ast2600-dma-dram
>     0000000080000000-000000017fffffff (prio 0, i/o): aspeed-ram-container
>       0000000080000000-00000000bfffffff (prio 0, ram): ram
>       00000000c0000000-ffffffffffffffff (prio 0, i/o): max_ram
> 
> Reviewed-by: Peter Maydell <peter.maydell@xxxxxxxxxx>
> Signed-off-by: Philippe Mathieu-Daudé <f4bug@xxxxxxxxx>

Reviewed-by: Cédric Le Goater <clg@xxxxxxxx>

Thanks,

C.

> ---
>  hw/arm/aspeed.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/hw/arm/aspeed.c b/hw/arm/aspeed.c
> index 2c23297edf..62344ac6a3 100644
> --- a/hw/arm/aspeed.c
> +++ b/hw/arm/aspeed.c
> @@ -262,7 +262,7 @@ static void aspeed_machine_init(MachineState *machine)
>      bmc = g_new0(AspeedBoardState, 1);
>  
>      memory_region_init(&bmc->ram_container, NULL, "aspeed-ram-container",
> -                       UINT32_MAX);
> +                       4 * GiB);
>      memory_region_add_subregion(&bmc->ram_container, 0, machine->ram);
>  
>      object_initialize_child(OBJECT(machine), "soc", &bmc->soc,
>