On 2015-06-17 16:00, Christian Borntraeger wrote: > Am 17.06.2015 um 15:46 schrieb Aurelien Jarno: > > On 2015-06-16 23:08, Alexander Graf wrote: > >> We now finally have TCG support for the basic set of instructions necessary > >> to run the s390-ccw machine. That means in any aspect possible that machine > >> type is now superior to the legacy s390-virtio machine. > >> > >> Switch over to the ccw machine as default. That way people don't get a > >> halfway > >> broken machine with the s390x target. > > > > It seems the current s390x-ccw firmware doesn't allow to boot on a > > virtio-scsi-ccw disk (but this is not a regression compared to the > > s390-virtio machine). virtio-scsi has some advantages over virtio-blk, > > like the possibility to do thin-provisioning. Of course one can use a > > small virtio-blk for the /boot partition, and virtio-scsi for the > > remaining disks. > > > > Do you think it would possible to add it? Given a virtio-scsi device can > > provide multiple disks, how can we pass the disk to boot on to the > > firmware? Currently it seems we pass the ccw device in GR7, but not more > > details. > > Yes, we look into that, Integrating this into s390 specifics without adding > hacks that have to last forever will take most of the time. We have to > consider aspects like loadparm, the existing interfaces for the zfcp > connectivity in the diag308 handler and so on (so that /sys/firmware/ipl/ > reflects the disks) - so give us some time to do it properly to see > how this can be integrated.
Great, thanks for working on that. -- Aurelien Jarno GPG: 4096R/1DDD8C9B aurel...@aurel32.net http://www.aurel32.net