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Re: [Qemu-devel] q35 chipset support

From: Markus Armbruster
Subject: Re: [Qemu-devel] q35 chipset support
Date: Fri, 15 Jun 2012 09:04:47 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.3 (gnu/linux)

Anthony Liguori <address@hidden> writes:

> On 06/14/2012 02:54 PM, Jason Baron wrote:
>> Hi,
>> I recently updated Isaku Yamahata's q35 patches to work on the latest qemu 
>> and
>> seabios trees. On the qemu side, most of the changes revolved around updating
>> to use QOM and updates to the memory API. I was also able to drop quite a few
>> patches that had already been resolved by the current qemu tree.
>> The trees seem pretty stable and can be found here:
>> git://github.com/jibaron/q35-qemu.git
>> git://github.com/jibaron/q35-seabios.git
> I'm got the beginnings of a feature page started:
> http://wiki.qemu.org/Features/Q35
> The approach above will not work in a QOM world unfortunately.  We
> need to do quite a bit of ground work before adding another chipset.
> The biggest task is converting devices to not require an ISA bus since
> ICH9 simply doesn't have an ISA bus.

Could you explain briefly why use of a software ISA bus construct
matters for device models and/or guests?


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