device: 0.850 graphic: 0.823 socket: 0.714 network: 0.713 performance: 0.658 semantic: 0.582 permissions: 0.528 PID: 0.520 vnc: 0.477 debug: 0.432 boot: 0.403 other: 0.368 files: 0.345 KVM: 0.329 QEMU would not start when trying to create two UFS host controllers Description of problem: This issue is reported by Akinobu Mita. https://lore.kernel.org/qemu-devel/20231204150543.48252-1-akinobu.mita@gmail.com/ > QEMU would not start when trying to create two UFS host controllers and a UFS logical unit for each with the following options: > > -device ufs,id=bus0 \ > -device ufs-lu,drive=drive1,bus=bus0,lun=0 \ > -device ufs,id=bus1 \ > -device ufs-lu,drive=drive2,bus=bus1,lun=0 \ > > This is because the same ID string ("0:0:0/scsi-disk") is generated > for both UFS logical units. > > To fix this issue, prepend the parent pci device's path to make > the ID string unique. > ("0000:00:03.0/0:0:0/scsi-disk" and "0000:00:04.0/0:0:0/scsi-disk")