Hi

Am 12.10.22 um 09:44 schrieb Arnd Bergmann:

On Wed, Oct 12, 2022, at 9:40 AM, Thomas Zimmermann wrote:

quoted

Am 12.10.22 um 09:17 schrieb Arnd Bergmann:

quoted

On Wed, Oct 12, 2022, at 8:46 AM, Thomas Zimmermann wrote:

quoted

Does qemu mark the device has having a particular endianess then, or
does it switch the layout of the framebuffer to match what the CPU
does?

The latter. On neither architecture does qemu expose this flag. The
default endianess corresponds to the host.

"host" as in the machine that qemu runs on, or the machine that is
being emulated? I suppose it would be broken either way, but in the
latter case, we could get away with detecting that the machine is
running under qemu.

Sorry, my mistake. I meant "guest": the endianess of the framebuffer 
corresponds to the endianess of the emulated machine.  Given that many 
graphics cards support LE and BE modes, I assume that this behavior 
mimics real-hardware systems.

Best regards
Thomas

     Arnd

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Ivo Totev