On Wednesday 11 November 2009, Anthony Liguori wrote: > Hannes Reinecke wrote: > > But why? Why do we have to emulate the entire HBA for the BIOS? > > The HBA is emulated, too, and just uses the bdrv interface > > internally anyway. > > So IMHO it makes far more sense to skip the HBA emulation in > > the BIOS completely and just use the bdrv interface directly > > here. > > If you use the bdrv interface (ala extboot), you couldn't boot via scsi > passthrough. > > VirtualBox implements a paravirtual SCSI bus to allow SCSI boot without > having to implement a full LSI driver. That's another way to solve the > problem.
This has its own issues. How do you prevent the guest enumerating both the paravirt and "real" adapters, and getting the same disk twice? If this isn't a problem, then surely the user can do this explicitly. In this case "guest" includes future fancy versions of the BIOS/bootloader. Paul
