[SeaBIOS] [PATCH 0/5][RFC] Simultaneous multi-platform support

[Gerd Hoffmann]

  Hi,

> I'm not sure what would depend on that. The virtio drivers don't need
> to. You just won't find those devices on real hardware. And hell, if
> someone actually makes real hardware that behaves like a virtio block
> device, why *shouldn't* it work?

It's basically two things we have:

  (a) Hardware initialization:  get config info via fw-cfg, map+init
      pci devices (src/pciinit.c), create acpi tables, ...
  (b) Hardware drivers for virtual hardware (virtio-blk, virtio-scsi,
      lsi, ...).

(a) is done by seabios only when booted directly, otherwise
    xen / coreboot /ovmf will handle that part.

(b) currently depends on CONFIG_QEMU, but those are useful for other
    cases too, to also boot from virtio when running on coreboot / csm.

> I think the only use case is for enabling the lsi SCSI and whatever the
> other driver was that was only ever tested on the qemu emulation?

That, and I think also to reduce the number of options.

I guess we should have a choice where you can pick coreboot / qemu / xen
/ csm  (I think xen isn't there today exactly because they want the
virtio drivers).

Then add a CONFIG_QEMU_DRIVERS menu where we put all virtual hardware
drivers in.  So when building for real hardware you'll just say 'n'
there and all virtual drivers will be skipped.

cheers,
  Gerd