Re: [Qemu-devel] [PATCH - V3] Port codes from qemu-kvm to support booting from SCSI disk image

[Blue Swirl]

On Wed, Aug 18, 2010 at 4:04 PM, Paul Brook <address@hidden> wrote:
>> > 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...
>>
>> Of course we could, but it should not be extboot, but proper scsi driver.
>> gpxe has src/drivers/block/scsi.c so may be it already supports qemu scsi
>> device?
>
> IIRC it only supports iSCSI.  You'd need to add the LSI HBA driver and
> possibly parallel SCSI transport bits.
>
> In practice I'd imagine the SCSI parts to be pretty straightforward. A bios
> driver can ignore most of the fancy bits (e.g. TCQ) that a full featured OS
> driver has to worry about.

ESP driver in OpenBIOS may be helpful:
http://tracker.coreboot.org/trac/openbios/browser/trunk/openbios-devel/drivers/esp.c#L227