Re: [Qemu-devel] [PATCH 0/4] megaraid_sas HBA emulation

[Avi Kivity]

On 10/28/2009 10:11 AM, Hannes Reinecke wrote:
> The problem is I don't have any documentation for the LSI parallel
> SCSI controller. So I don't know if and in what shape I/O is passed
> down, nor anything else. And as the SCSI disk emulation is really
> tied into the LSI parallel SCSI controller, any change in the former
> is likely to break the latter.
> And what with me no way of fixing it. Hence I decided on this approach.
>
> I surely can go ahead and patch up the scsi disk emulation, but it's
> quite likely to break the LSI controller. If that's okay with everybody,
> I'll surely go ahead there.

Reverse engineered devices are dangerous.  They might work on some 
guests but break badly on others, or even worse, break when a guest 
driver is updated.

Is there no way to get the documentation?

--
Do not meddle in the internals of kernels, for they are subtle and quick to 
panic.