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From: Anthony Liguori <anthony@codemonkey.ws>
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>
Subject: Re: [Qemu-devel] [PATCH] spapr-pci: change endianness for io ports space
Date: Mon, 15 Jul 2013 21:05:39 -0500	[thread overview]
Message-ID: <CA+aC4ku8kJ84_pB3outAjV_QabF992KiifES3VK+uKQsMj+1_Q@mail.gmail.com> (raw)
In-Reply-To: <51E4963B.3020201@ozlabs.ru>

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

  reply	other threads:[~2013-07-16  2:05 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-07-12  7:37 [Qemu-devel] [PATCH] spapr-pci: change endianness for io ports space Alexey Kardashevskiy
2013-07-12  8:59 ` [Qemu-devel] BUG report " Alexey Kardashevskiy
2013-07-12 11:25   ` Alexander Graf
2013-07-13  8:03 ` [Qemu-devel] " David Gibson
2013-07-14 13:22   ` Alexey Kardashevskiy
2013-07-15 15:02     ` Anthony Liguori
2013-07-15 23:06       ` Alexey Kardashevskiy
2013-07-16  0:28         ` Anthony Liguori
2013-07-16  0:39           ` Alexey Kardashevskiy
2013-07-16  2:05             ` Anthony Liguori [this message]
2013-07-16  2:17               ` Alexey Kardashevskiy

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