On 08/28/2017 04:15 PM, Farhan Ali wrote: > > > On 08/28/2017 10:05 AM, Cornelia Huck wrote: >>>>> It's the alignment of the CCW which causes the problem. >>>>> >>>>> The exact error message when starting the guest was: >>>>> >>>>> ! No virtio device found ! >>>>> >>>>> Since it worked for SCSI and CDL, and failed for LDL disks on that >>>>> particular system, we are not really sure what caused the failure. >>>>> Debugging it further showed the CCW for LDL disks were not aligned at >>>>> double word boundary. >> This is really, really odd, as the low-level ccw code is the same for >> any disk type... >> > Exactly! > >>>>> Trying the test on a different system with LDL disks worked fine, with >>>>> the aligned(8) fix. >>>> Do you happen to have an old s390-ccw.img laying around in the test >>>> folder? QEMU might pick up >>>> this one (e.g. when calling it without libvirt from the command line). >>>> >>> I explicitly mention the bios to use with '-bios' option and pick up the >>> latest bios. Without the aligned fix I see the error and with the fix it >>> works fine. >> Wait, so the fix fixes it? Or am I confused now? >> > > It fixes in my system and one other system we tried on. But fails on a system > where this issue was first noticed.
This is very confusing. So you have tried -bios on the system where the issue was first noticed and the issue still persists despite of the fixed bios is specified?
