Hi, On 05.08.2016 10:28, Daniel P. Berrange wrote: > On Fri, Aug 05, 2016 at 10:23:58AM +0800, Kevin Zhao wrote: >> Hi All, >> I have a problem may about Qemu and kindly need your help. Does >> qemu-system-aarch64 support virtio-9p ? >> Recently I have tried to use qemu remapped the file from host to >> guest. As I know, Qemu has supported this so long as guest kernel has >> support 9p(virtfs). Reference to this link: >> http://wiki.qemu.org/Documentation/9psetup >> Fedora 24 AArch64 kernel has supported this: >> [root@sha-win-225 ~]# lsmod | grep 9p >> 9p 56273 0 >> fscache 87449 1 9p >> 9pnet_virtio 9122 0 >> 9pnet 83564 2 9p,9pnet_virtio >> virtio_ring 13866 5 virtio_net,virtio_pci,9pnet_ >> virtio,virtio_mmio,virtio_scsi >> virtio 9467 5 virtio_net,virtio_pci,9pnet_ >> virtio,virtio_mmio,virtio_scsi >> >> Now I use virsh to launch the VM, and the corresponding qemu command I >> have pasted here: >> http://paste.openstack.org/show/549225/. >> You can see that: >> * -fsdev >> local,security_model=mapped,id=fsdev-fs0,path=/var/lib/libvirt/images/coreos >> -device >> virtio-9p-pci,id=fs0,fsdev=fsdev-fs0,mount_tag=share,bus=pci.2,addr=0x1* >> Here is the command that remapped the directory from host to guest. >> After VM launched, I use the command to mount: >> * mount -t 9p -o trans=virtio share /tmp/shared/ >> -oversion=9p2000.L,posixacl,cache=loose* >> But mount command will be blocked and output nothing. > > Try using version=9p2000.u instead - I've noticed other versions have > been buggy in various kernel version/qemu version combinations. The > 9p2000.u version is what i use in libvirt-sandobx and so I know it will > work in general.
We are using version=9p2000.L here with qemu-system-aarch64, and it works well. We tested only on qemu-2.5 though. Ciao, Claudio > >> The Qemu version is QEMU emulator version 2.5.0 (Debian >> 1:2.5+dfsg-5ubuntu10.2). Besides test fedora24 guest, I have got the same >> problem in Debian jessie. >> Kindly need your help~You will be really appreciated. > > Regards, > Daniel > -- Claudio Fontana Server Virtualization Architect Huawei Technologies Duesseldorf GmbH Riesstraße 25 - 80992 München
