Re: [QUESTION]: vhost-user-gpu: Unable to find a satisfying vhost-user-gpu

[Jun Piao]

在 2020/5/27 20:29, Marc-André Lureau 写道:
> Hi
> 
> On Wed, May 27, 2020 at 11:18 AM Jun Piao <piaojun@huawei.com 
> <mailto:piaojun@huawei.com>> wrote:
> 
>     Hi Marc-André,
> 
>     I encounter a problem when trying to use vhost-user-gpu as below. And
>     I'm not familiar to the libvirt code. Could you please help find out
>     the reason?
> 
>     # virsh create snap1.xml
>     error: Failed to create domain from snap1.xml
>     error: operation failed: Unable to find a satisfying vhost-user-gpu
> 
> 
> Libvirt implements the logic described in: 
> https://git.qemu.org/?p=qemu.git;a=blob;f=docs/interop/vhost-user.json;h=ef8ac5941f5c8d14402566a984a0a0876d768c19;hb=HEAD#l171
> 
> Check if you have  /usr/share/qemu/vhost-user/50-qemu-gpu.json and if the 
> binary location is correct.
> 
> If it fails after that, enable libvirt debugging for more details.
> 

Thanks for your reply, and I did as you said, but another error happend:

50-qemu-gpu.json:
{
  "description": "QEMU vhost-user-gpu",
  "type": "gpu",
  "binary": "/usr/local/libexec/vhost-user-gpu"
}

# virsh create /home/vm/snap1.xml
error: Failed to create domain from /home/vm/snap1.xml
error: internal error: Could not get process id of vhost-user-gpu

libvirt log:
----------------------------------------------------------------------
2020-05-28 13:10:48.345+0000: Starting external device: vhost-user-gpu
/usr/local/libexec/vhost-user-gpu
2020-05-28 13:10:48.374+0000: starting up libvirt version: 5.8.0, qemu version: 
4.1.1, kernel: 4.18.0, hostname: localhost.localdomain
LC_ALL=C \
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin \
HOME=/var/lib/libvirt/qemu/domain-1-snap1 \
XDG_DATA_HOME=/var/lib/libvirt/qemu/domain-1-snap1/.local/share \
XDG_CACHE_HOME=/var/lib/libvirt/qemu/domain-1-snap1/.cache \
XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain-1-snap1/.config \
QEMU_AUDIO_DRV=spice \
/home/code/qemu-4.1.1/aarch64-softmmu/qemu-system-aarch64 \
-name guest=snap1,debug-threads=on \
-S \
-object 
secret,id=masterKey0,format=raw,file=/var/lib/libvirt/qemu/domain-1-snap1/master-key.aes
 \
-machine virt-2.8,accel=kvm,usb=off,dump-guest-core=off,gic-version=3 \
-cpu host \
-drive 
file=/usr/share/edk2.git/aarch64/QEMU_EFI-pflash.raw,if=pflash,format=raw,unit=0,readonly=on
 \
-drive 
file=/var/lib/libvirt/qemu/nvram/euler_VARS.fd,if=pflash,format=raw,unit=1 \
-m 4096 \
-overcommit mem-lock=off \
-smp 4,sockets=4,cores=1,threads=1 \
-uuid 3eb97356-8642-4282-88de-8de0a36d3bc1 \
-smbios 'type=1,manufacturer=OpenStack Foundation,product=OpenStack 
Nova,version=13.0.1-517.11,family=Virtual Machine' \
-smbios 'type=3,manufacturer=Dell 
Inc.,version=2.12,serial=65X0XF2,asset=40000101,sku=Type3Sku1' \
-no-user-config \
-nodefaults \
-chardev socket,id=charmonitor,fd=34,server,nowait \
-mon chardev=charmonitor,id=monitor,mode=control \
-rtc base=2020-05-29T01:10:48,clock=vm,driftfix=slew \
-no-shutdown \
-no-acpi \
-boot strict=on \
-device 
pcie-root-port,port=0x8,chassis=1,id=pci.1,bus=pcie.0,multifunction=on,addr=0x1 
\
-device pcie-pci-bridge,id=pci.2,bus=pci.1,addr=0x0 \
-device pcie-root-port,port=0x9,chassis=3,id=pci.3,bus=pcie.0,addr=0x1.0x1 \
-device pcie-root-port,port=0xa,chassis=4,id=pci.4,bus=pcie.0,addr=0x1.0x2 \
-device pcie-root-port,port=0xb,chassis=5,id=pci.5,bus=pcie.0,addr=0x1.0x3 \
-device usb-ehci,id=usb,bus=pci.2,addr=0x3 \
-device virtio-scsi-pci,id=scsi0,bus=pci.4,addr=0x0 \
-device ahci,id=sata0,bus=pci.2,addr=0x2 \
-device virtio-serial-pci,id=virtio-serial0,bus=pci.2,addr=0x4 \
-drive 
file=/home/vm/snap1.img,format=qcow2,if=none,id=drive-scsi0-0-0-0,cache=none,aio=native
 \
-device 
scsi-hd,bus=scsi0.0,channel=0,scsi-id=0,lun=0,device_id=drive-scsi0-0-0-0,drive=drive-scsi0-0-0-0,id=scsi0-0-0-0,bootindex=1,write-cache=on
 \
-netdev tap,fd=37,id=hostnet0,vhost=on,vhostfd=40 \
-device 
virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:69:17:b1,bus=pci.5,addr=0x0 
\
-chardev pty,id=charserial0 \
-serial chardev:charserial0 \
-device usb-tablet,id=input0,bus=usb.0,port=1 \
-device usb-kbd,id=input1,bus=usb.0,port=2 \
-spice 
unix,addr=/tmp/spice.socket1,disable-ticketing,gl=on,rendernode=/dev/dri/renderD128,seamless-migration=on
 \
-chardev socket,id=chr-vu-video0,fd=36 \
-device 
vhost-user-gpu-pci,id=video0,max_outputs=1,chardev=chr-vu-video0,bus=pci.3,addr=0x0
 \
-device virtio-balloon-pci,id=balloon0,bus=pci.2,addr=0x5 \
-msg timestamp=on
2020-05-28 13:10:48.374+0000: Domain id=1 is tainted: host-cpu
libvirt:  error : libvirtd quit during handshake: Input/output error
2020-05-28 13:10:48.389+0000: shutting down, reason=failed

thanks,
Jun