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")