[SeaBIOS] DSDT: SMC device node (was: Fix HPET _CRS Method)

Kevin O'Connor kevin at koconnor.net
Wed Dec 12 01:51:59 CET 2012

On Wed, Dec 12, 2012 at 01:40:52AM +0100, Alexander Graf wrote:
> On 12.12.2012, at 01:30, Kevin O'Connor wrote:
> > On Tue, Dec 11, 2012 at 09:53:47AM -0500, Gabriel L. Somlo wrote:
> >> What do you guys think ?
> > 
> > How about generating an SSDT with just the AppleSMC info in it, and
> > then have qemu pass the SSDT into SeaBIOS using the existing ACPI
> > table passing mechanism when the device is present.
> That would mean we move the present detection to SeaBIOS which also simply talks to fw_cfg. So it doesn't really buy us anything over an _STA function, does it?

QEMU can already pass an SSDT table to SeaBIOS - I was suggesting that
QEMU could make the decision whether or not to send the table based on
it's direct knowledge of whether or not the device is present.

There is, of course, complexities with this type of implementation
too.  However, I felt compelled to reiterate my desire for ACPI to be
moved from SeaBIOS to QEMU as that's really the place that has all the
knowledge to do it correctly.


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