[SeaBIOS] [PATCH RFC] acpi: add ssdt for cpi hotplug

[Kevin O'Connor]

On Thu, Nov 03, 2011 at 09:04:57AM +0800, Wen Congyang wrote:
> At 11/03/2011 08:30 AM, Kevin O'Connor Write:
> > I think it's reasonable to require that a user supplied DSDT still
> > fill certain requirements.  Keep in mind that the reason for the "user
> > supplied" DSDT was for new platform (q35) development - not
> > necessarily so each individual user could set their own.
> 
> I do not think it's reasonable to require that a user supplied DSDT still
> fill certain requiements.

Please elaborate on why.

The dependency on the DSDT is a few methods (PCEJ, CPEJ, CPST, CPMA).
Under what circumstances would it be difficult for these methods to be
provided?

> I think we should not use default SSDT if we use user supplied DSDT.
> If we use user supplied DSDT, we should use user supplied SSDT too.

That's possible.  However, how do you plan to provide a DSDT that
accounts for the dynamic nature of the virtual system configuration.
A different qemu/kvm command line (which configures pci or cpu count)
will then require a different DSDT.

-Kevin