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Date: Mon, 08 Oct 2012 18:18:01 +0200
From: =?ISO-8859-15?Q?Andreas_F=E4rber?= <afaerber@suse.de>
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Subject: Re: [Qemu-devel] [PATCH 00/14] Remove old_portio users for memory
 region PIO mapping
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To: Alexander Graf <agraf@suse.de>
Cc: Anthony Liguori <aliguori@us.ibm.com>, xen-devel@lists.xensource.com, Stefano Stabellini <stefano.stabellini@eu.citrix.com>, qemu-devel qemu-devel <qemu-devel@nongnu.org>, "qemu-ppc@nongnu.org List" <qemu-ppc@nongnu.org>, Avi Kivity <avi@redhat.com>, Scott Wood <scottwood@freescale.com>, David Gibson <david@gibson.dropbear.id.au>

Am 08.10.2012 14:23, schrieb Alexander Graf:
> When running on PowerPC, we don't have native PIO support. There are a =
few hacks
> around to enable PIO access on PowerPC nevertheless.
>=20
> The most typical one is the isa-mmio device. It takes MMIO requests and=
 converts
> them to PIO requests on the (QEMU internal) PIO bus.
>=20
> This however is not how real hardware works and it limits us in the abi=
lity to
> spawn eventfd's on PIO ports which doesn't work with this approach.  In=
stead,
> let's model it more easily. Let's just map the PIO memory region into M=
MIO
> space.
>=20
> For this to work, we need to get rid of all old_portio struct users, as=
 they
> break with this approach. This is what this patch set does.

Looks sensible to me as far as reviewed, but I'm missing a patch 13 that
actually rips out old_portio afterwards. :)

Andreas

> It also converts
> the e500 machines and sPAPR to the new memory region model.
>=20
>=20
> Alex

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