Re: [Qemu-devel] [PATCH 3/9] hw/misc/empty_slot: Allow overide by device with higher priority

[Artyom Tarasenko <atar4qemu@gmail.com>]

On Tue, Jun 25, 2019 at 12:01 AM Philippe Mathieu-Daudé <f4bug@amsat.org> wrote:
>
> The 'empty_slot' models a ChipEnable (or ChipSelect) MMIO device
> pluggable on a bus.
> The bus allow such slots to be not connected ('empty), thus no
> bus errors are generated when this range is accessed.
>
> The device is mapped at priority -10000 to allow other devices
> to be mapped on top of it.
>
> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>

Reviewed-by: Artyom Tarasenko <atar4qemu@gmail.com>

> ---
>  hw/misc/empty_slot.c | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/hw/misc/empty_slot.c b/hw/misc/empty_slot.c
> index 0adf7a26dc..53299cdbd1 100644
> --- a/hw/misc/empty_slot.c
> +++ b/hw/misc/empty_slot.c
> @@ -68,7 +68,11 @@ void empty_slot_init(hwaddr addr, uint64_t slot_size)
>
>          qdev_init_nofail(dev);
>
> -        sysbus_mmio_map(s, 0, addr);
> +        /*
> +         * We use a priority lower than the default UNIMPLEMENTED_DEVICE
> +         * to be able to plug a UnimplementedDevice on an EmptySlot.
> +         */
> +        sysbus_mmio_map_overlap(s, 0, addr, -10000);
>      }
>  }
>
> --
> 2.19.1
>


-- 
Regards,
Artyom Tarasenko

SPARC and PPC PReP under qemu blog: http://tyom.blogspot.com/search/label/qemu