Hi all, this patchset implements an emulation for the megaraid_sas HBA. It provides emulates an LSI MegaRAID SAS 8708EM2 HBA, ie presenting to the guest a virtual SCSI adapter. Internally it is using aio for read/write requests and either SG_IO or SCSI command emulation for everything else. The reason for choosing the megaraid_sas HBA and not, say, implementing a virtio scsi interface is because: - the megaraid_sas is using a very simple firmware interface, comparable to virtio - the HBA driver are already existent, so I only have to write the backend :-) The device can be accessed by -drive if=raid,file=XXX In order to support SCSI command emulation I had to update / patch up the existing SCSI disk support. This might be not to everyones taste, so I'm open to alternative suggestions. But I certainly do _not_ want to update the SCSI disk emulation, as this is really quite tied to the SCSI parallel interface used by the old lsi53c895a.c. Plus it doesn't do scatter-gather list handling, which is quite impossible to fix without proper documentation. Of course, if anyone else would step in here, I won't object :-) It currently runs guests with 2.6.27 and up; Windows XP support is not quite there yet. Anything else might work; if not, enable debugging and sent me the logfile. As usual, comment / suggestions etc welcome. Cheers, Hannes -- Dr. Hannes Reinecke zSeries & Storage hare@xxxxxxx +49 911 74053 688 SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg GF: Markus Rex, HRB 16746 (AG Nürnberg) -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
