[Qemu-devel] Re: [PATCH 00/14] pcbios: support q35 chipset

[Isaku Yamahata]

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.

I see. Do you have schedule plan of the switch in mind?


> >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.

So at least an interface to pass acpi tables to guest bios from qemu
is necessary. FW_CFG interface seems reasonable.
Generating tables dynamically sounds attractive. However it seems much
longer term goal like machine config file.
-- 
yamahata