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Date: Mon, 15 Jul 2013 21:05:39 -0500
Message-ID: <CA+aC4ku8kJ84_pB3outAjV_QabF992KiifES3VK+uKQsMj+1_Q@mail.gmail.com>
From: Anthony Liguori <anthony@codemonkey.ws>
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Subject: Re: [Qemu-devel] [PATCH] spapr-pci: change endianness for io ports
	space
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To: Alexey Kardashevskiy <aik@ozlabs.ru>
Cc: Alexander Graf <agraf@suse.de>, qemu-ppc@nongnu.org, qemu-devel <qemu-devel@nongnu.org>, David Gibson <david@gibson.dropbear.id.au>

On Mon, Jul 15, 2013 at 7:39 PM, Alexey Kardashevskiy <aik@ozlabs.ru> wrote:
> On 07/16/2013 10:28 AM, Anthony Liguori wrote:
>> Alexey Kardashevskiy <aik@ozlabs.ru> writes:
>>
>> The right solution is to drop the additional IO region on sPAPR and
>> remove the ISA devices marking themselves as "little endian".
>
>
> No, this is not endianness, this is something different caused by a
> difference in IO port registration (subpage? section? memoryregion? I am
> going to draw a graph and try realize what is what here :) ).
>
> Even very first IO port access does not reach VGA, fails somehow in
> address_space_translate_internal() but devices other than VGA (well, at
> least network devices) work perfectly.

Can you be more specific about what's failing?  VGA works fine for me with TCG.

Regards,

Anthony Liguori

>
>
>> But that requires careful testing and fixing the other platforms that
>> also are relying on the doube byte lane swapping.
>
>
> --
> Alexey