From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:39801) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bVf1W-0005pE-Q6 for qemu-devel@nongnu.org; Fri, 05 Aug 2016 09:18:52 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bVf1U-0005g2-B4 for qemu-devel@nongnu.org; Fri, 05 Aug 2016 09:18:49 -0400 Received: from mail-vk0-x22e.google.com ([2607:f8b0:400c:c05::22e]:36775) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bVf1U-0005fs-4c for qemu-devel@nongnu.org; Fri, 05 Aug 2016 09:18:48 -0400 Received: by mail-vk0-x22e.google.com with SMTP id n129so190750899vke.3 for ; Fri, 05 Aug 2016 06:18:47 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: <57A46B46.1090703@huawei.com> References: <20160805082857.GH9933@redhat.com> <57A46A1D.6000608@huawei.com> <57A46B46.1090703@huawei.com> From: Kevin Zhao Date: Fri, 5 Aug 2016 21:18:46 +0800 Message-ID: Content-Type: text/plain; charset=UTF-8 Subject: Re: [Qemu-devel] [Help]: Does qemu-system-aarch64 support virtio-9p? I got a problem when remap host file to guest in AArch64. List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Claudio Fontana Cc: "Daniel P. Berrange" , Peter Maydell , qemu-arm , QEMU Developers Hi Claudio, Could you tell me what host and guest OS are you using? And the hardware is 96board or other Hisilicon Server? I use SoftIron. 8 cores AArch64 servers. On 5 August 2016 at 18:32, Claudio Fontana wrote: > On 05.08.2016 12:27, Claudio Fontana wrote: > > 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. > > Forgot to mention though that we backported commit c8225aa1 "virtio-9p: > use accessor to get thread_pool" though, > as without it we have experienced crashes. > > Ciao, C. > >