On 18.08.2010, at 17:08, Paul Brook wrote: >> The qemu-kvm could boot from SCSI disk image by utilizing seabios, this >> patch ported codes >> from qemu-kvm to let upstream qemu to support booting from SCSI disk image. > > No. This has nothing to do with SCSI. > > What it does is add a really cheap and nasty block storage device that > aliases > one of the other block devices in the system. This is bad. The OS has no way > of knowing which devices are aliased, and we really don't want yet another > braindead guest visible interface (c.f. recent performance issues where - > kernel/fw_cfg were being abused) > > This has been discussed several times before. The proper solution is to teach > the bios how to boot off SCSI devices. IIRC support for virtio devices > already > exists, implementing support for the SCSI controller shouldn't be that much > harder.
Couldn't we just have an option rom for the SCSI controller? The same way the VGABIOS is a rewrite of a VGA BIOS for the Cirrus Logic... Alex
