Re: SMRAM sizes on large hosts

[Gerd Hoffmann <kraxel@redhat.com>]

  Hi,

> I propose the following: add a new fw_cfg file which communicates how
> much memory (how many megabytes) the "11b" value in the tseg size
> register will configure.

I'd prefer to keep fw_cfg out of the picture, and I think we can do it
without too much problems.

We have a TSEGMB (tseg memory base) register.  qemu doesn't implement it
(but I think you can write to it and read back what you've written).

We could make qemu update that register in case "11b" is written to the
tseg size.  The firmware then can read TSEGMB and figure whenever a
large tseg is supported and if so how big it is.

cheers,
  Gerd