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Date: Wed, 30 Sep 2009 18:14:59 +0200
From: Gleb Natapov <gleb@redhat.com>
Subject: Re: [Qemu-devel] Re: [PATCH 00/14] pcbios: support q35 chipset
Message-ID: <20090930161459.GJ9832@redhat.com>
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To: Anthony Liguori <anthony@codemonkey.ws>
Cc: Isaku Yamahata <yamahata@valinux.co.jp>, qemu-devel@nongnu.org

On Wed, Sep 30, 2009 at 08:23:59AM -0500, Anthony Liguori wrote:
> Isaku Yamahata wrote:
> >This patches to pcbios is for q35 chipset.
> >This is The change set of da5ff65dc9473e3f069736d38b9a189ea14a67eb
> >in git://git.qemu.org/pcbios.git
> 
> Patches against SeaBIOS are also required as we're planning to
> switch to SeaBIOS.
> 
> In fact, you don't need to bother with pcbios if you'd rather focus
> on SeaBIOS.
> 
> >There would be a discussion to change bioses.
> >This patches modifies ACPI DSDT directly which
> >is linked into bios binary image.
> >This would not be acceptable and it would be a bad
> >idea to have two bios binary image for piix and q35.
> >So instead, I'm thinking of dynamic loading ACPI table.
> >I'd like to hear opinions. What do you think?
> 
> Could we dynamically generate the necessary tables?  Using iasl is a
> bit problematic as we introduce more knobs via qdev.  I expect that
> we're going to move to an almost entirely generated set of tables.
> 
Is is almost impossible to dynamically generate DSDT that does
nontrivial things. We can use different SSDT for different chipset
and decide which one to use in runtime.

--
			Gleb.