Re: qemu-system-sh4eb build has something hinky in the ethernet

On 1/9/25 09:47, Geert Uytterhoeven wrote:

> On Sun, 24 Aug 2025 at 20:40, Rob Landley <[email protected]> wrote:
>> Anyway, this works fine on little endian, but the qemu-system-sh4eb
>> build has something hinky in the ethernet, I haven't tackled it myself
>> because I don't know whether the device emulation or the driver is
>> what's missing an endian swap. (I don't want to fix it the "wrong way",
> 
> That is using sh_eth, right?
> 
> Last time I tried booting a big-endian ARM kernel on R-Car M2-W,
> the Linux kernel booted fine, except for Ethernet.  So sh_eth is definitely
> not big-endian clean.

qemu-system-sh4{eb} only emulates the R2D+ board, which AFAIK
provides ethernet via a RTL8139 over PCI. While old, RTL8139
is very tested and expected to have endianness well handled.

> 
> [*] I didn't have a big-endian userspace.
> 
> Gr{oetje,eeting}s,
> 
>                          Geert
>