Re: [Qemu-devel] [PATCHv2 4/8] Store IDE bus id in IDEBus structure for easy access.

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Gleb Natapov <gleb@xxxxxxxxxx> writes:

> On Sat, Nov 06, 2010 at 10:25:31AM +0100, Markus Armbruster wrote:
>> Gleb Natapov <gleb@xxxxxxxxxx> writes:
>> 
>> > On Fri, Nov 05, 2010 at 05:31:38PM +0100, Markus Armbruster wrote:
>> >> Gleb Natapov <gleb@xxxxxxxxxx> writes:
>> >> 
>> >> > On Fri, Nov 05, 2010 at 03:04:05PM +0100, Markus Armbruster wrote:
>> >> [...]
>> >> >> >> >> There has been quite some discussion on "canonical path" on the list,
>> >> >> >> >> but no consensus.  Ironically, one of the places where we got stuck was
>> >> >> >> >> ISA.  You cut right through that, so that's progress.  Maybe people
>> >> >> >> >> aren't looking ;)
>> >> >> >> > That is funny since the problem was already solved looong time ago. Just
>> >> >> >> > look at Open Firmware device path. They are capable of addressing all
>> >> >> >> > devices just fine, ISA devices included. What specific problem you had
>> >> >> >> > with ISA bus? 
>> >> >> >> 
>> >> >> >> Lack of consensus.  I was in favour of using I/O base, just like you do.
>> >> >> >> There were worries about ISA devices not using any I/O ports.
>> >> >> > There is a solution for that problem for almost 15 years and we are
>> >> >> > still looking for consensus on qemu list?! Here is ISA device binding
>> >> >> > spec for Open Firmware: http://playground.sun.com/1275/bindings/isa/isa0_4d.ps 
>> >> >> > If ISA device have no IO ports MMIO is used.
>> >> >> 
>> >> >> Precedence should promote consensus, but it can't replace it.  If you
>> >> >> can push the list to consensus, more power to you.
>> >> > I do not see disagreement right now :) You are saying you agree. Blue
>> >> > Swirl asked me to use Open Firmware so I assume he agrees to. So who is
>> >> > against and what are his arguments?
>> >> 
>> >> Start here:
>> >> 
>> >> http://lists.nongnu.org/archive/html/qemu-devel/2010-06/msg01618.html
>> >
>> > I saw this in fact. The wouldn't agree with this device path proposal
>> > too. It mixes qemu internal names (which is a big no-no for my purpose)
>> > and bus addresses. Paul made sensible points there and if you look
>> > closely what he proposes is what I implemented here. Regarding ISA
>> > ("busses that don't have a consistent addressing scheme" he called it)
>> > he himself proposed to use address of the first IO port/memory region
>> > as an ID. This is what is already implemented by my patch.
>> 
>> You don't have to convince me; I was with Paul in that thread.
>> 
> So who should I convince :)? Alex? He is CCed. Jan? I do not see him
> complaining here.

No more complaints, no more convincing.

[...]
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