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Date: Fri, 8 Mar 2013 09:37:43 +1000
Message-ID: <CAEgOgz6SO7Q4-+EJ6ftoxn2ams3Sognte5fvDVbm+H2kEH9VfQ@mail.gmail.com>
From: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Content-Type: text/plain; charset=ISO-8859-1
Subject: Re: [Qemu-devel] [PATCH] sysbus: add no_user for devices using mmio
 or IRQ or GPIO
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To: Peter Maydell <peter.maydell@linaro.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>, Anthony Liguori <aliguori@us.ibm.com>, Markus Armbruster <armbru@redhat.com>, qemu-devel@nongnu.org

On Fri, Mar 8, 2013 at 1:41 AM, Peter Maydell <peter.maydell@linaro.org> wrote:
> On 7 March 2013 20:45, Peter Crosthwaite <peter.crosthwaite@xilinx.com> wrote:
>>> Case four: "we really don't expect anybody to be trying to wire this
>>> up dynamically", which would apply to things like the on-cpu peripherals
>>> for some ARM cores.
>>
>> What ARM cores were you thinking here exactly? We are already doing
>> dynamic machine creation of ARM systems including instantiation of
>> individual MPCore components.
>
> I was handwaving a bit, but for instance arm_mptimer is marked as
> no_user. How are you doing dynamic machine creation when neither -device
> nor device_add support mapping sysbus mmio or wiring up gpio and irq
> lines?
>

Its all out of tree using out device tree driven machine instantiation
but we are toying with the idea of moving away from that in favour of
-device and friends (2100 less lines out of tree code for me), once
the aforementioned fixes to sysbus/gpio go through. ARM MPTimer will
still be one of the IPs we will want to dynamically create however.

Regards,
Peter

> -- PMM
>