Re: [PATCH v2] hw/i386: place setup_data at fixed place in memory

[Gerd Hoffmann]

  Hi,

> > We can make setup_data chaining work with OVMF, but the whole chain
> > should be located in a GPA range that OVMF dictates.
> 
> It sounds like what you describe is pretty OVMF-specific though,
> right? Do we want to tie things together so tightly like that?
> 
> Given we only need 48 bytes or so, isn't there a more subtle place we
> could just throw this in ram that doesn't need such complex
> coordination?

Joining the party late (and still catching up the thread).  Given we
don't need that anyway with EFI, only with legacy BIOS:  Can't that just
be a protocol between qemu and pc-bios/optionrom/*boot*.S on how to pass
those 48 bytes random seed?

take care,
  Gerd