Re: [PATCH] hw/acpi: Set memory regions to native endian as a work around

[Paolo Bonzini]

On 11/8/21 15:30, Paolo Bonzini wrote:
> On 11/8/21 14:05, BALATON Zoltan wrote:
> > When using ACPI on big endian machine (such as ppc/pegasos2 which has
> > a VT8231 south bridge with ACPI) writes to ACPI registers come out
> > byte swapped. This may be caused by a bug in memory subsystem but
> > until that is fixed setting the ACPI memory regions to native endian
> > makes it usable for big endian machines. This fixes ACPI shutdown with
> > pegasos2 when using the board firmware for now.
> > This could be reverted when the memory layer is fixed.
>
> What is the path to the swapped writes?  Even just a backtrace might be 
> enough to understand what's going on, and especially where the bug is.

Ok, Michael pointed me at 
https://lore.kernel.org/all/20211011080528-mutt-send-email-mst@kernel.org/.

Paolo