[Qemu-devel] [Bug 611142] Re: seabios should have native scsi support

[agraf]

I guess the best way to make this work would be to get the original
option rom for the emulated LSI SCSI controller licensed so that we can
use it freely. That way we

a) verify that the emulation is correct
b) are even closer to real world hardware

The difficult thing here is on how to talk to LSI.

-- 
seabios should have native scsi support
https://bugs.launchpad.net/bugs/611142
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Status in QEMU: New
Status in “qemu-kvm” package in Ubuntu: New
Status in “seabios” package in Ubuntu: New

Bug description:
Binary package hint: seabios

Currently when a grub multiboot image is booted with 'kvm -kernel' and 
'biosdisk' module, it will see block devices of type IDE or virtio.  It will 
not see scsi devices.

To demonstrate this:
$ qemu-img create -f qcow2 disk.img 1G
$ grub-mkrescue --output=rescue.iso
$ grub-mkimage -O i386-pc --output=grub-mb.img biosdisk minicmd part_msdos

An 'ls' inside the grub prompt will show hard disks (hd0) on if:
a.) -drive uses interface of virtio or scsi
or
b.) kvm boots boot from a cdrom or floppy 

For example, with these commands, grub will see a '(hd0)'
$ kvm -drive file=disk.img,if=scsi,boot=on -cdrom rescue.iso -boot d
$ kvm -drive file=disk.img,if=scsi,boot=on -floppy rescue.iso -boot a
$ kvm -drive file=disk.img,if=virtio,boot=on -cdrom rescue.iso -boot d
$ kvm -drive file=disk.img,if=ide,boot=on -cdrom rescue.iso -boot d
$ kvm -drive file=disk.img,if=virtio,boot=on -kernel grub-mb.img 
$ kvm -drive file=disk.img,if=ide,boot=on -kernel grub-mb.img 

But the following will not:
$ kvm -drive file=disk.img,if=scsi,boot=on -kernel grub-mb.img

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: seabios 0.6.0-0ubuntu1
ProcVersionSignature: User Name 2.6.32-305.9-ec2 2.6.32.11+drm33.2
Uname: Linux 2.6.32-305-ec2 i686
Architecture: i386
Date: Thu Jul 29 03:21:21 2010
Dependencies:
 
Ec2AMI: ami-e930db80
Ec2AMIManifest: 
ubuntu-images-testing-us/ubuntu-maverick-daily-i386-server-20100727.manifest.xml
Ec2AvailabilityZone: us-east-1b
Ec2InstanceType: m1.small
Ec2Kernel: aki-407d9529
Ec2Ramdisk: unavailable
PackageArchitecture: all
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: seabios