path: root/results/scraper/launchpad/1889945

virtiofsd exits when iommu_platform is enabled after virtiofs driver is loaded

Bug in QEMU 5.0.0:

virtiofsd exits when iommu_platform is enabled after virtiofs driver is loaded.
If iommu_platform is disabled the guest immediately locks up as a result of the configured PCIe-Passthrough.

Host system:
- Arch Linux amd64
- AMD Ryzen Platform
- QEMU 5.0.0

Guest system:
- Windows Server 2019 (also happens in linux installations)
- PCIe GPU hostdev
- virtiofs passthrough

Many thanks for any advice.

QEMU LOG:
2020-07-28 19:20:07.197+0000: Starting external device: virtiofsd
/usr/lib/qemu/virtiofsd --fd=29 -o source=/viofstest
2020-07-28 19:20:07.207+0000: starting up libvirt version: 6.5.0, qemu version: 5.0.0, kernel: 5.7.10-arch1-1, hostname: mspc
LC_ALL=C \
PATH=/usr/local/sbin:/usr/local/bin:/usr/bin \
HOME=/var/lib/libvirt/qemu/domain-7-win \
XDG_DATA_HOME=/var/lib/libvirt/qemu/domain-7-win/.local/share \
XDG_CACHE_HOME=/var/lib/libvirt/qemu/domain-7-win/.cache \
XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain-7-win/.config \
QEMU_AUDIO_DRV=none \
/usr/bin/qemu-system-x86_64 \
-name guest=win,debug-threads=on \
-S \
-object secret,id=masterKey0,format=raw,file=/var/lib/libvirt/qemu/domain-7-win/master-key.aes \
-blockdev '{"driver":"file","filename":"/usr/share/ovmf/x64/OVMF_CODE.fd","node-name":"libvirt-pflash0-storage","auto-read-only":true,"discard":"unmap"}' \
-blockdev '{"node-name":"libvirt-pflash0-format","read-only":true,"driver":"raw","file":"libvirt-pflash0-storage"}' \
-blockdev '{"driver":"file","filename":"/var/lib/libvirt/qemu/nvram/win_VARS.fd","node-name":"libvirt-pflash1-storage","auto-read-only":true,"discard":"unmap"}' \
-blockdev '{"node-name":"libvirt-pflash1-format","read-only":false,"driver":"raw","file":"libvirt-pflash1-storage"}' \
-machine pc-q35-5.0,accel=kvm,usb=off,vmport=off,dump-guest-core=off,kernel_irqchip=on,pflash0=libvirt-pflash0-format,pflash1=libvirt-pflash1-format \
-cpu host,migratable=on,hv-time,hv-relaxed,hv-vapic,hv-spinlocks=0x1fff,hv-vendor-id=whatever,kvm=off \
-m 2048 \
-overcommit mem-lock=off \
-smp 8,sockets=8,cores=1,threads=1 \
-object memory-backend-file,id=ram-node0,prealloc=yes,mem-path=/dev/hugepages/libvirt/qemu/7-win,share=yes,size=2147483648 \
-numa node,nodeid=0,cpus=0-7,memdev=ram-node0 \
-uuid c8efa194-52f8-4526-a0f8-29a254839b55 \
-display none \
-no-user-config \
-nodefaults \
-chardev socket,id=charmonitor,fd=29,server,nowait \
-mon chardev=charmonitor,id=monitor,mode=control \
-rtc base=localtime,driftfix=slew \
-global kvm-pit.lost_tick_policy=delay \
-no-hpet \
-no-shutdown \
-global ICH9-LPC.disable_s3=1 \
-global ICH9-LPC.disable_s4=1 \
-boot menu=off,strict=on \
-device pcie-root-port,port=0x10,chassis=1,id=pci.1,bus=pcie.0,multifunction=on,addr=0x2 \
-device pcie-pci-bridge,id=pci.2,bus=pci.1,addr=0x0 \
-device pcie-root-port,port=0x11,chassis=3,id=pci.3,bus=pcie.0,addr=0x2.0x1 \
-device pcie-root-port,port=0x12,chassis=4,id=pci.4,bus=pcie.0,addr=0x2.0x2 \
-device pcie-root-port,port=0x13,chassis=5,id=pci.5,bus=pcie.0,addr=0x2.0x3 \
-device pcie-root-port,port=0x14,chassis=6,id=pci.6,bus=pcie.0,addr=0x2.0x4 \
-device pcie-root-port,port=0x15,chassis=7,id=pci.7,bus=pcie.0,addr=0x2.0x5 \
-device pcie-root-port,port=0x16,chassis=8,id=pci.8,bus=pcie.0,addr=0x2.0x6 \
-device pcie-root-port,port=0x17,chassis=9,id=pci.9,bus=pcie.0,addr=0x2.0x7 \
-device pcie-root-port,port=0x18,chassis=10,id=pci.10,bus=pcie.0,multifunction=on,addr=0x3 \
-device pcie-root-port,port=0x19,chassis=11,id=pci.11,bus=pcie.0,addr=0x3.0x1 \
-device pcie-root-port,port=0x1a,chassis=12,id=pci.12,bus=pcie.0,addr=0x3.0x2 \
-device pcie-root-port,port=0x8,chassis=13,id=pci.13,bus=pcie.0,multifunction=on,addr=0x1 \
-device pcie-root-port,port=0x9,chassis=14,id=pci.14,bus=pcie.0,addr=0x1.0x1 \
-device pcie-root-port,port=0xa,chassis=15,id=pci.15,bus=pcie.0,addr=0x1.0x2 \
-device pcie-root-port,port=0xb,chassis=16,id=pci.16,bus=pcie.0,addr=0x1.0x3 \
-device nec-usb-xhci,id=usb,bus=pci.7,addr=0x0 \
-device virtio-serial-pci,id=virtio-serial0,bus=pci.14,addr=0x0 \
-blockdev '{"driver":"host_device","filename":"/dev/zvol/ssd/windows","aio":"threads","node-name":"libvirt-3-storage","cache":{"direct":true,"no-flush":false},"auto-read-only":true,"discard":"unmap"}' \
-blockdev '{"node-name":"libvirt-3-format","read-only":false,"cache":{"direct":true,"no-flush":false},"driver":"raw","file":"libvirt-3-storage"}' \
-device virtio-blk-pci,bus=pci.3,addr=0x0,drive=libvirt-3-format,id=virtio-disk0,bootindex=1,write-cache=on \
-blockdev '{"driver":"host_device","filename":"/dev/zvol/ssd/windows-ssdgames1","aio":"threads","node-name":"libvirt-2-storage","cache":{"direct":true,"no-flush":false},"auto-read-only":true,"discard":"unmap"}' \
-blockdev '{"node-name":"libvirt-2-format","read-only":false,"cache":{"direct":true,"no-flush":false},"driver":"raw","file":"libvirt-2-storage"}' \
-device virtio-blk-pci,bus=pci.9,addr=0x0,drive=libvirt-2-format,id=virtio-disk1,write-cache=on \
-blockdev '{"driver":"host_device","filename":"/dev/zvol/hdd/win-games1","aio":"threads","node-name":"libvirt-1-storage","cache":{"direct":true,"no-flush":false},"auto-read-only":true,"discard":"unmap"}' \
-blockdev '{"node-name":"libvirt-1-format","read-only":false,"cache":{"direct":true,"no-flush":false},"driver":"raw","file":"libvirt-1-storage"}' \
-device virtio-blk-pci,bus=pci.13,addr=0x0,drive=libvirt-1-format,id=virtio-disk2,write-cache=on \
-chardev socket,id=chr-vu-fs0,path=/var/lib/libvirt/qemu/domain-7-win/fs0-fs.sock \
-device vhost-user-fs-pci,chardev=chr-vu-fs0,tag=viofstest,iommu_platform=on,ats=on,bus=pci.15,addr=0x0 \
-netdev tap,fd=32,id=hostnet0,vhost=on,vhostfd=34 \
-device virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:fb:0c:28,bus=pci.10,addr=0x0 \
-chardev spicevmc,id=charchannel0,name=vdagent \
-device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=com.redhat.spice.0 \
-device virtio-keyboard-pci,id=input0,bus=pci.12,addr=0x0 \
-device virtio-tablet-pci,id=input1,bus=pci.8,addr=0x0 \
-device virtio-mouse-pci,id=input2,bus=pci.11,addr=0x0 \
-device ich9-intel-hda,id=sound0,bus=pci.2,addr=0x1 \
-device hda-duplex,id=sound0-codec0,bus=sound0.0,cad=0 \
-device vfio-pci,host=0000:08:00.0,id=hostdev0,bus=pci.5,addr=0x0,rombar=1 \
-device vfio-pci,host=0000:08:00.1,id=hostdev1,bus=pci.6,addr=0x0,rombar=1 \
-device virtio-balloon-pci,id=balloon0,bus=pci.4,addr=0x0 \
-object input-linux,id=kbd1,evdev=/dev/input/by-path/pci-0000:0a:00.3-usb-0:3:1.0-event-kbd,grab_all=on,repeat=on \
-object input-linux,id=mouse1,evdev=/dev/input/by-path/pci-0000:0a:00.3-usb-0:4:1.0-event-mouse \
-sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny \
-msg timestamp=on
2020-07-28 19:20:07.207+0000: Domain id=7 is tainted: high-privileges
2020-07-28 19:20:07.207+0000: Domain id=7 is tainted: custom-argv
2020-07-28 19:20:07.207+0000: Domain id=7 is tainted: host-cpu
<--- VIOFS DRIVER GETS LOADED HERE --->
2020-07-28T19:20:57.568089Z qemu-system-x86_64: Failed to read msg header. Read -1 instead of 12. Original request 1566376224.
2020-07-28T19:20:57.568120Z qemu-system-x86_64: Fail to update device iotlb
2020-07-28T19:20:57.568147Z qemu-system-x86_64: Failed to read msg header. Read 0 instead of 12. Original request 1566376528.
2020-07-28T19:20:57.568151Z qemu-system-x86_64: Fail to update device iotlb
2020-07-28T19:20:57.568153Z qemu-system-x86_64: Failed to set msg fds.
2020-07-28T19:20:57.568156Z qemu-system-x86_64: vhost_set_vring_call failed: Invalid argument (22)
2020-07-28T19:20:57.568160Z qemu-system-x86_64: Failed to set msg fds.
2020-07-28T19:20:57.568162Z qemu-system-x86_64: vhost_set_vring_call failed: Invalid argument (22)
2020-07-28T19:20:57.568296Z qemu-system-x86_64: Failed to read from slave.

The QEMU project is currently moving its bug tracking to another system.
For this we need to know which bugs are still valid and which could be
closed already. Thus we are setting the bug state to "Incomplete" now.

If the bug has already been fixed in the latest upstream version of QEMU,
then please close this ticket as "Fix released".

If it is not fixed yet and you think that this bug report here is still
valid, then you have two options:

1) If you already have an account on gitlab.com, please open a new ticket
for this problem in our new tracker here:

    https://gitlab.com/qemu-project/qemu/-/issues

and then close this ticket here on Launchpad (or let it expire auto-
matically after 60 days). Please mention the URL of this bug ticket on
Launchpad in the new ticket on GitLab.

2) If you don't have an account on gitlab.com and don't intend to get
one, but still would like to keep this ticket opened, then please switch
the state back to "New" within the next 60 days (otherwise it will get
closed as "Expired"). We will then eventually migrate the ticket auto-
matically to the new system (but you won't be the reporter of the bug
in the new system and thus won't get notified on changes anymore).

Thank you and sorry for the inconvenience.


[Expired for QEMU because there has been no activity for 60 days.]