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From: Anthony Liguori <anthony@codemonkey.ws>
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Date: Mon, 22 Jul 2013 14:52:01 -0500
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Subject: Re: [Qemu-devel] [PATCH 0/9] Add platform bus
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To: Alexander Graf <agraf@suse.de>
Cc: Peter Maydell <peter.maydell@linaro.org>, "qemu-ppc@nongnu.org list:PowerPC" <qemu-ppc@nongnu.org>, qemu-devel Developers <qemu-devel@nongnu.org>

Alexander Graf <agraf@suse.de> writes:

> On 22.07.2013, at 21:38, Anthony Liguori wrote:
>
>> Alexander Graf <agraf@suse.de> writes:
>> 
>> tl;dr, this is a PV bus for the e500 described as something more
>> generic.  I don't buy it.  I don't think there are many platforms or
>> devices out there where you can arbitrarily hook up devices at random
>> offsets/IRQs and expect things to work in any meaningful way.
>> 
>> So I'll suggest one of three things:
>> 
>> 1) Just use PCI and call it a day
>
> If only the world was this easy. We already use PCI for everything where it makes sense today, but some devices I want to create dynamically from the command line simply aren't on PCI.
>
>> 2) Rename this to E500PlatformBus and call it a day
>
> This could be used just the same for ARM's mach-virt, so I'd rather
> not make it e500 specific.

If someone designed a "virt" machine and didn't include PCI or some
other sane existing bus...

It's just silly to reinvent things that already exist and are well
supported by existing software/management tools.

Regards,

Anthony Liguori