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Re: [Qemu-ppc] [Qemu-devel] [PATCH v3 11/14] ioport: Switch dispatching

From: Benjamin Herrenschmidt
Subject: Re: [Qemu-ppc] [Qemu-devel] [PATCH v3 11/14] ioport: Switch dispatching to memory core layer
Date: Fri, 12 Jul 2013 08:32:40 +1000

On Thu, 2013-07-11 at 15:28 +0200, Alexander Graf wrote:
> Semantically having your PCI host bridge do the endianness conversion
> is the correct way of handling it, as that's where the conversion
> happens. If it makes life easier to do it in the isa bridging code,
> that's fine for me too though. But then we'll have to get rid of all
> endianness swaps that already happen in PCI bridges.

BTW. Why would IOs to a PCI VGA device go through an "ISA bridge" of any
kind ? PCI IO space is PCI IO space... whether there is an ISA bridge or
not is a separate thing and PCI VGA cards certainly don't sit behind


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