On 06/07/2013 12:29 AM, Frederic Konrad wrote: > On 06/06/2013 15:59, Alexey Kardashevskiy wrote: >> On 06.06.2013 22:44, Frederic Konrad wrote: >>> On 06/06/2013 12:13, Alexey Kardashevskiy wrote: >>>> Hi! >>>> >>>> For the pseries platform (server PPC64) we do not support PCI hotplug >>>> yet. >>>> However we still want to hot plug disks. >>>> >>>> As a workaround, we could add multiple SCSI host devices >>>> (virtio-scsi-pci, >>>> spapr-vscsi) without any disk attached and later (using qemu console) >>>> attach drives to them as we do with the "-drive" parameter in the >>>> command line. >>>> >>>> So I enabled CONFIG_PCI_HOTPLUG_OLD=y and tried. >>>> >>>> However, drive_add console command works only with PCI what eliminates >>>> "spapr-vscsi" from the list. Oookay. >>>> >>>> Then I tried running qemu with "-device virtio-scsi-pci,id=device0" and >>>> later doing "drive_add 0 file=virtimg/test1" from the qemu console. This >>>> time qemu responded with "Device is not a SCSI adapter" what is >>>> correct as >>>> nowadays virtio-XXXX-pci devices are not what are they called as they >>>> simply create underlying virtio-bus, attach a real virtio-XXXX-device >>>> there >>>> (which is not PCI) and only then attach disk to non-PCI virtio device. >>> Hi, >>> >>> Seems it's a bug: il should be compatible with the old virtio-scsi-pci. >>> What's the meaning of the "0" in drive_add command? >> It is a PCI slot number, the complete address would include a domain and >> a bus. >> >> > > Ok thanks, I'll take a look. >>> Fred >>>> So as I see there is no way to attach a disk to an existing controller in >>>> already running qemu. >>>> >>>> This is how I add disks to qemu now: >>>> -device virtio-scsi-pci,id=virtioscsi0 \ >>>> -drive file=virtimg/fc18guest,if=none,id=drive0,readonly=off, >>>> format=raw,media=disk,werror=stop,rerror=stop \ >>>> -device scsi-disk,id=scsidisk0,bus=virtioscsi0.0,channel=0, >>>> scsi-id=0,lun=0,drive=drive0,removable=off \ > > This two last command isn't available in the monitor? >>>> >>>> I want to only add "-device virtio-scsi-pci,id=virtioscsi0" to the >>>> command >>>> line and do the rest from the qemu console. >>>> >>>> Am I missing some useful command from qemu console or anything else? >>>> Thanks!
This works (thanks to Anthony): ./qemu-system-ppc64 \ -L "qemu-ppc64-bios/" \ -nodefaults \ -chardev "stdio,id=char1,signal=off,mux=on" \ -device "spapr-vty,id=ser1,chardev=char1" \ -mon "chardev=char1,mode=readline,id=mon1" \ -m "1024" \ -machine "pseries" \ -nographic \ -vga "none" \ -enable-kvm \ -kernel "guest.vmlinux.n" \ -initrd "1.cpio" \ -device "virtio-scsi-pci,id=foo" And then issue 2 commands in the qemu console: drive_add auto file=virtimg/fc18guest,if=none,id=bar device_add scsi-disk,bus=foo.0,drive=bar,unit=0 The guest is even able to autodetect new volume. Profit. -- Alexey
