[CentOS-virt] Issues with exposing USB serial dongle to guest VM

24 Apr 2017


      Hi.
I have Centos 7 (updated) running as my host, and I’m using Qemu and KVM, version 2.0.0 and 2.6.0.
I have a Trendnet TU-S9 USB serial dongle attached to the host, which uses the Prolific 2303 chipset.
I blacklisted the pl2303 driver so the host doesn’t grab the device, and want to expose it to the guest.
On the client, I see 2 USB hubs (3.0 and 2.0), and I see 2 USB endpoints (even though 3 are configured).  So the USB CF card readers are visible, but not the USB dongle, even though it’s plugged in.
Here’s what I see on the host:
[philipp@kvm1 ~]$ ps -f -p13468
UID        PID  PPID  C STIME TTY          TIME CMD
qemu     13468     1  2 14:51 ?        00:02:39 /usr/libexec/qemu-kvm -name guest=ubuntu16.04-2,debug-threads=on -S -object secret,id=masterKey0,format=raw,file=/var/lib/libvirt/qemu/domain-2-ubuntu16.04-2/master-key.aes -machine pc-i440fx-rhel7.3.0,accel=kvm,usb=off -cpu Broadwell,+vme,+ds,+acpi,+ss,+ht,+tm,+pbe,+dtes64,+monitor,+ds_cpl,+vmx,+smx,+est,+tm2,+xtpr,+pdcm,+dca,+osxsave,+f16c,+rdrand,+arat,+tsc_adjust,+xsaveopt,+pdpe1gb,+abm,+rtm,+hle -m 8192 -realtime mlock=off -smp 8,maxcpus=12,sockets=12,cores=1,threads=1 -uuid a9590ac8-e532-4dce-b6ef-d3b35c0db865 -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-2-ubuntu16.04-2/monitor.sock,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc,driftfix=slew -global kvm-pit.lost_tick_policy=discard -no-hpet -no-shutdown -global PIIX4_PM.disable_s3=1 -global PIIX4_PM.disable_s4=1 -boot strict=on -device nec-usb-xhci,id=usb,bus=pci.0,addr=0x5 -device ich9-usb-ehci1,id=usb1,bus=pci.0,addr=0xa.0x7 -device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x6 -drive file=/var/lib/libvirt/images/ubuntu16.04-2.img,format=raw,if=none,id=drive-virtio-disk0 -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x7,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 -drive if=none,id=drive-ide0-0-0,readonly=on -device ide-cd,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0 -chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -chardev spicevmc,id=charchannel0,name=vdagent -device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=com.redhat.spice.0 -spice port=5900,addr=127.0.0.1,disable-ticketing,image-compression=off,seamless-migration=on -device qxl-vga,id=video0,ram_size=67108864,vram_size=67108864,vram64_size_mb=0,vgamem_mb=16,bus=pci.0,addr=0x2 -device intel-hda,id=sound0,bus=pci.0,addr=0x4 -device hda-duplex,id=sound0-codec0,bus=sound0.0,cad=0 -chardev spicevmc,id=charredir0,name=usbredir -device usb-redir,chardev=charredir0,id=redir0,bus=usb.0,port=1 -chardev spicevmc,id=charredir1,name=usbredir -device usb-redir,chardev=charredir1,id=redir1,bus=usb.0,port=2 -device usb-host,hostbus=3,hostaddr=13,id=hostdev1,bus=usb.0,port=3 -device usb-host,hostbus=3,hostaddr=12,id=hostdev2,bus=usb.0,port=4 -device usb-host,hostbus=3,hostaddr=15,id=hostdev3,bus=usb1.0,port=1 -device vfio-pci,host=07:10.0,id=hostdev0,bus=pci.0,addr=0x3 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x8 -msg timestamp=on
[philipp@kvm1 ~]$ COMMAND    PID USER   FD qemu-kvm 13468 qemu  cwd qemu-kvm 13468 qemu  rtd qemu-kvm 13468 qemu  txt qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  DEL qemu-kvm 13468 qemu  DEL qemu-kvm 13468 qemu  mem qemu-kvm 13468 qemu  DEL qemu-kvm 13468 qemu    0u qemu-kvm 13468 qemu    1w qemu-kvm 13468 qemu    2w qemu-kvm 13468 qemu    3r qemu-kvm 13468 qemu qemu-kvm 13468 qemu qemu-kvm 13468 qemu qemu-kvm 13468 qemu qemu-kvm 13468 qemu qemu-kvm 13468 qemu qemu-kvm 13468 qemu   10u qemu-kvm 13468 qemu   11u qemu-kvm 13468 qemu   12u qemu-kvm 13468 qemu   13u  a_inode qemu-kvm 13468 qemu   14u qemu-kvm 13468 qemu   15u qemu-kvm 13468 qemu   16u qemu-kvm 13468 qemu   17u qemu-kvm 13468 qemu   18u qemu-kvm 13468 qemu   19u  a_inode qemu-kvm 13468 qemu   20u  a_inode qemu-kvm 13468 qemu   21u  a_inode qemu-kvm 13468 qemu   22u  a_inode qemu-kvm 13468 qemu   23u  a_inode qemu-kvm 13468 qemu   24u  a_inode qemu-kvm 13468 qemu   25u  a_inode qemu-kvm 13468 qemu   26u  a_inode qemu-kvm 13468 qemu   27u qemu-kvm 13468 qemu   28u qemu-kvm 13468 qemu   29u  netlink qemu-kvm 13468 qemu   30r qemu-kvm 13468 qemu   31w qemu-kvm 13468 qemu   32r qemu-kvm 13468 qemu   33w qemu-kvm 13468 qemu   34u  a_inode qemu-kvm 13468 qemu   35u qemu-kvm 13468 qemu   36u qemu-kvm 13468 qemu   37u  a_inode qemu-kvm 13468 qemu   38u  a_inode qemu-kvm 13468 qemu   39u  a_inode qemu-kvm 13468 qemu   40u  a_inode qemu-kvm 13468 qemu   41u qemu-kvm 13468 qemu   42u qemu-kvm 13468 qemu   43u qemu-kvm 13468 qemu   44u qemu-kvm 13468 qemu   45u qemu-kvm 13468 qemu   46u qemu-kvm 13468 qemu   47u qemu-kvm 13468 qemu   48u qemu-kvm 13468 qemu   49u  a_inode qemu-kvm 13468 qemu   50u qemu-kvm 13468 qemu   51u  a_inode qemu-kvm 13468 qemu   52u  a_inode qemu-kvm 13468 qemu   53u  a_inode qemu-kvm 13468 qemu   54u  a_inode qemu-kvm 13468 qemu   55u  a_inode qemu-kvm 13468 qemu   56u  a_inode qemu-kvm 13468 qemu   57u  a_inode qemu-kvm 13468 qemu   58u  a_inode qemu-kvm 13468 qemu   59u  a_inode qemu-kvm 13468 qemu   60u  a_inode qemu-kvm 13468 qemu   61u  a_inode qemu-kvm 13468 qemu   62u  a_inode qemu-kvm 13468 qemu   63u  a_inode qemu-kvm 13468 qemu   64u  a_inode qemu-kvm 13468 qemu   65u  a_inode qemu-kvm 13468 qemu   66u  a_inode qemu-kvm 13468 qemu   67u  a_inode qemu-kvm 13468 qemu   68u  a_inode qemu-kvm 13468 qemu   69u  a_inode qemu-kvm 13468 qemu   70u  a_inode qemu-kvm 13468 qemu   71u  a_inode qemu-kvm 13468 qemu   72u  a_inode qemu-kvm 13468 qemu   73u  a_inode qemu-kvm 13468 qemu   74u  a_inode qemu-kvm 13468 qemu   75u  a_inode qemu-kvm 13468 qemu   76u  a_inode qemu-kvm 13468 qemu   77u  a_inode qemu-kvm 13468 qemu   78u  a_inode qemu-kvm 13468 qemu   79u  a_inode qemu-kvm 13468 qemu   80u  a_inode qemu-kvm 13468 qemu   81u  a_inode qemu-kvm 13468 qemu   82u  a_inode qemu-kvm 13468 qemu   83u  a_inode qemu-kvm 13468 qemu   84u  a_inode qemu-kvm 13468 qemu   85u  a_inode qemu-kvm 13468 qemu   86u  a_inode qemu-kvm 13468 qemu   87u  a_inode qemu-kvm 13468 qemu   88u  a_inode qemu-kvm 13468 qemu   89u  a_inode qemu-kvm 13468 qemu   90u  a_inode qemu-kvm 13468 qemu   91u  a_inode qemu-kvm 13468 qemu   92u  a_inode qemu-kvm 13468 qemu   93u  a_inode qemu-kvm 13468 qemu   94u  a_inode qemu-kvm 13468 qemu   95u  a_inode qemu-kvm 13468 qemu   96u  a_inode qemu-kvm 13468 qemu   97u  a_inode qemu-kvm 13468 qemu   98u  a_inode qemu-kvm 13468 qemu   99u  a_inode qemu-kvm 13468 qemu  100u  a_inode qemu-kvm 13468 qemu  101u  a_inode qemu-kvm 13468 qemu  102u  a_inode qemu-kvm 13468 qemu  103u  a_inode qemu-kvm 13468 qemu  104u  a_inode qemu-kvm 13468 qemu  105u  a_inode qemu-kvm 13468 qemu  106u  a_inode qemu-kvm 13468 qemu  107u  a_inode qemu-kvm 13468 qemu  108u  a_inode qemu-kvm 13468 qemu  109u  a_inode qemu-kvm 13468 qemu  110u  a_inode qemu-kvm 13468 qemu  111u  a_inode qemu-kvm 13468 qemu  112u  a_inode qemu-kvm 13468 qemu  113u  a_inode qemu-kvm 13468 qemu  114u  a_inode qemu-kvm 13468 qemu  115u  a_inode qemu-kvm 13468 qemu  116u  a_inode qemu-kvm 13468 qemu  117u  a_inode qemu-kvm 13468 qemu  118u  a_inode qemu-kvm 13468 qemu  119u  a_inode qemu-kvm 13468 qemu  120u  a_inode [philipp@kvm1 ~]$ lsusb Bus 002 Device Bus 002 Device Bus 001 Device Bus 001 Device Bus 004 Device Bus 004 Device Bus 004 Device Bus 003 Device Bus 003 Device Bus 003 Device Bus 003 Device Bus 003 Device Bus 003 Device Bus 003 Device Bus 003 Device Bus 003 Device Bus 003 Device Bus 003 Device Bus 003 Device Bus 003 Device Bus 003 Device [philipp@kvm1 ~]$ <!-- WARNING: THIS IS OVERWRITTEN AND virsh edit ubuntu16.04-2 or other application -->

sudo lsof -p 13468 -n -P TYPE             DEVICE     SIZE/OFF       NODE NAME DIR              253,0          242         64 / DIR              253,0          242         64 / REG              253,0      8883768  100834619 /usr/libexec/qemu-kvm REG              253,0        19984   34091991 /usr/lib64/sasl2/libplain.so.3.0.0 REG              253,0        19984   34091988 /usr/lib64/sasl2/liblogin.so.3.0.0 REG              253,0        57888   33916680 /usr/lib64/sasl2/libdigestmd5.so.3.0.0 REG              253,0        24160   33916677 /usr/lib64/sasl2/libcrammd5.so.3.0.0 REG              253,0      1846280  100701718 /usr/lib64/libdb-5.3.so REG              253,0        28200   33627120 /usr/lib64/sasl2/libsasldb.so.3.0.0 REG              253,0        19952   33627117 /usr/lib64/sasl2/libanonymous.so.3.0.0 REG              253,0        62184  100664409 /usr/lib64/libnss_files-2.17.so REG              253,0        68192  100701681 /usr/lib64/libbz2.so.1.0.6 REG              253,0        99952  100701712 /usr/lib64/libelf-0.166.so REG              253,0       398264  100701630 /usr/lib64/libpcre.so.1.2.0 REG              253,0        28360  100702508 /usr/lib64/libogg.so.0.8.0 REG              253,0       189256  100882393 /usr/lib64/libvorbis.so.0.4.6 REG              253,0      2944120  100882395 /usr/lib64/libvorbisenc.so.2.0.9 REG              253,0       285608  100882391 /usr/lib64/libFLAC.so.8.3.0 REG              253,0        48848  100960245 /usr/lib64/libgsm.so.1.0.12 REG              253,0       113584  100664401 /usr/lib64/libnsl-2.17.so REG              253,0       157424  100701670 /usr/lib64/liblzma.so.5.2.2 REG              253,0        65648  101002376 /usr/lib64/libXi.so.6.1.0 REG              253,0        75848  101002374 /usr/lib64/libXext.so.6.4.0 REG              253,0        15512  100984172 /usr/lib64/libXau.so.6.0.0 REG              253,0       301576  100701829 /usr/lib64/libdw-0.166.so REG              253,0       155744  100701646 /usr/lib64/libselinux.so.1 REG              253,0        15624  100701842 /usr/lib64/libgmodule-2.0.so.0.4600.2 REG              253,0        32304  100701834 /usr/lib64/libffi.so.6.0.1 REG              253,0        11384  100667805 /usr/lib64/libfreebl3.so REG              253,0        23824  101229361 /usr/lib64/libasyncns.so.0.3.1 REG              253,0       378904  100960252 /usr/lib64/libsndfile.so.1.0.25 REG              253,0        42520  100702401 /usr/lib64/libwrap.so.0.7.6 REG              253,0        24104  101002378 /usr/lib64/libXtst.so.6.1.0 REG              253,0        32312  100826893 /usr/lib64/libSM.so.6.0.1 REG              253,0       100472  100826878 /usr/lib64/libICE.so.6.3.0 REG              253,0       141080  101002368 /usr/lib64/libxcb.so.1.1.0 REG              253,0      1318920  101002372 /usr/lib64/libX11.so.6.3.0 REG              253,0         6848  101002370 /usr/lib64/libX11-xcb.so.1.0.0 REG              253,0        15688  100702424 /usr/lib64/libkeyutils.so.1.5 REG              253,0        62744  100667837 /usr/lib64/libkrb5support.so.0.1 REG              253,0        19384  100701739 /usr/lib64/libgpg-error.so.0.10.0 REG              253,0        48672  100984118 /usr/lib64/libunwind.so.8.0.1 REG              253,0       285296  100702506 /usr/lib64/libjpeg.so.62.1.0 REG              253,0       334904  100701844 /usr/lib64/libgobject-2.0.so.0.4600.2 REG              253,0      1595056  100701838 /usr/lib64/libgio-2.0.so.0.4600.2 REG              253,0        62688  100882399 /usr/lib64/libcelt051.so.0.0.0 REG              253,0       139008  100664438 /usr/lib64/libnl-3.so.200.23.0 REG              253,0       444832  100664446 /usr/lib64/libnl-route-3.so.200.23.0 REG              253,0       494440  100702458 /usr/lib64/libgmp.so.10.2.0 REG              253,0       160776  100702524 /usr/lib64/libhogweed.so.2.5 REG              253,0        82176  100702502 /usr/lib64/libtasn1.so.6.2.3 REG              253,0       465360  101027983 /usr/lib64/libtspi.so.1.2.0 REG              253,0       290864  100702407 /usr/lib64/libp11-kit.so.0.0.0 REG              253,0        41080  100664395 /usr/lib64/libcrypt-2.17.so REG              253,0       111080  100664419 /usr/lib64/libresolv-2.17.so REG              253,0        20024  100701747 /usr/lib64/libcap.so.2.22 REG              253,0       304576  100701679 /usr/lib64/libdbus-1.so.3.7.4 REG              253,0       502608     375140 /usr/lib64/pulseaudio/libpulsecommon-6.0.so REG              253,0        45456  100701728 /usr/lib64/libjson-c.so.2.0.1 REG              253,0       454008  100702586 /usr/lib64/libssl.so.1.0.1e REG              253,0      2025760  100702584 /usr/lib64/libcrypto.so.1.0.1e REG              253,0        19888  100701744 /usr/lib64/libattr.so.1.1.0 REG              253,0        15608  100702497 /usr/lib64/libboost_system-mt.so.1.53.0 REG              253,0        94320  100702518 /usr/lib64/libboost_thread-mt.so.1.53.0 REG              253,0       344280  100868642 /usr/lib64/libldap-2.4.so.2.10.3 REG              253,0        61872  100868640 /usr/lib64/liblber-2.4.so.2.10.3 REG              253,0        15848  100701657 /usr/lib64/libcom_err.so.2.1 REG              253,0       202568  100667824 /usr/lib64/libk5crypto.so.3.1 REG              253,0       959008  100667833 /usr/lib64/libkrb5.so.3.3 REG              253,0       324888  100667817 /usr/lib64/libgssapi_krb5.so.2.2 REG              253,0        19776  100664397 /usr/lib64/libdl-2.17.so REG              253,0       251784  101017300 /usr/lib64/libnspr4.so REG              253,0        20048  101017301 /usr/lib64/libplc4.so REG              253,0        15744  101017302 /usr/lib64/libplds4.so REG              253,0       186216  100706671 /usr/lib64/libnssutil3.so REG              253,0      1236840  100702603 /usr/lib64/libnss3.so REG              253,0       164040  100702605 /usr/lib64/libsmime3.so REG              253,0       315080  101072314 /usr/lib64/libssl3.so REG              253,0       208920  100701832 /usr/lib64/libidn.so.11.6.11 REG              253,0       534768  100667864 /usr/lib64/libgcrypt.so.11.8.2 REG              253,0      2118128  100664059 /usr/lib64/libc-2.17.so REG              253,0       143944  100664417 /usr/lib64/libpthread-2.17.so REG              253,0        88720  100663365 /usr/lib64/libgcc_s-4.8.5-20150702.so.1 REG              253,0      1141928  100664399 /usr/lib64/libm-2.17.so REG              253,0       999944  100667871 /usr/lib64/libstdc++.so.6.0.19 REG              253,0        44448  100664421 /usr/lib64/librt-2.17.so REG              253,0         6944  100701846 /usr/lib64/libgthread-2.0.so.0.4600.2 REG              253,0       305168  100984122 /usr/lib64/libtcmalloc.so.4.2.6 REG              253,0        31904  100827014 /usr/lib64/libusbredirparser.so.1.0.0 REG              253,0        99528  100826629 /usr/lib64/libusb-1.0.so.0.1.0 REG              253,0      1287896  100701840 /usr/lib64/libglib-2.0.so.0.4600.2 REG              253,0        49800  100702607 /usr/lib64/libcacard.so.0.0.0 REG              253,0      1230208  100749039 /usr/lib64/libspice-server.so.1.10.1 REG              253,0        80096  101153158 /usr/lib64/libibverbs.so.1.0.0 REG              253,0        92032  101153164 /usr/lib64/librdmacm.so.1.0.0 REG              253,0       266680  100984135 /usr/lib64/libseccomp.so.2.3.1 REG              253,0        23800  100826840 /usr/lib64/libsnappy.so.1.1.4 REG              253,0       135112  100702462 /usr/lib64/liblzo2.so.2.0.0 REG              253,0      1292416  101027989 /usr/lib64/libgnutls.so.28.41.16 REG              253,0       201296  100702526 /usr/lib64/libnettle.so.4.7 REG              253,0       121296  100701724 /usr/lib64/libsasl2.so.3.0.0 REG              253,0       179296  100768842 /usr/lib64/libpng15.so.15.13.0 REG              253,0       320984  101017286 /usr/lib64/libpulse.so.0.18.0 REG              253,0      1033536  100826787 /usr/lib64/libasound.so.2.0.0 REG              253,0        50712  100702422 /usr/lib64/libnuma.so.1 REG              253,0        14872  100664425 /usr/lib64/libutil-2.17.so REG              253,0       698744  100826854 /usr/lib64/libpixman-1.so.0.34.0 REG              253,0       174088  100826406 /usr/lib64/libssh2.so.1.0.1 REG              253,0        20040  100706670 /usr/lib64/libuuid.so.1.3.0 REG              253,0        99304  100794835 /usr/lib64/libgfxdr.so.0.0.1 REG              253,0       115088  100794833 /usr/lib64/libgfrpc.so.0.0.1 REG              253,0       896344  100794837 /usr/lib64/libglusterfs.so.0.0.1 REG              253,0       150056  100826654 /usr/lib64/libgfapi.so.0.0.0 REG              253,0        37056  100701754 /usr/lib64/libacl.so.1.1.0 REG              253,0      5342808  100841989 /usr/lib64/librados.so.2.0.0 REG              253,0      5789632  100768762 /usr/lib64/librbd.so.1.0.0 REG              253,0       435120  100842007 /usr/lib64/libcurl.so.4.3.0 REG              253,0       125336   33843740 /usr/lib64/iscsi/libiscsi.so.2.0.10900 REG              253,0         6264  100702465 /usr/lib64/libaio.so.1.0.1 REG              253,0        90664  100701649 /usr/lib64/libz.so.1.2.7 REG              253,0       155464  100664052 /usr/lib64/ld-2.17.so REG                0,9                    6936 anon_inode:[vfio-device] (stat: No such file or directory) REG              253,0       162552  100706665 /usr/lib64/libsystemd.so.0.6.0 REG              253,0        83208  100706667 /usr/lib64/libudev.so.1.6.2 REG                0,4                   37202 /dev/zero REG                0,4                   37201 /dev/zero REG               0,18         4024      38290 /dev/shm/spice.13468 REG                0,4                   38287 /dev/zero CHR                1,3          0t0       1028 /dev/null FIFO                0,8          0t0      45255 pipe FIFO                0,8          0t0      45255 pipe CHR                1,9          0t0       1033 /dev/urandom 4u  a_inode                0,9            0       6936 [signalfd] 5u  a_inode                0,9            0       6936 [eventpoll] 6u  a_inode                0,9            0       6936 [eventfd] 7u  a_inode                0,9            0       6936 [eventpoll] 8u  a_inode                0,9            0       6936 [eventfd] 9u  a_inode                0,9            0       6936 [eventfd] unix 0xffff88102b7c1000          0t0      38284 /var/lib/libvirt/qemu/domain-2-ubuntu16.04-2/monitor.sock CHR                5,2          0t0       1158 /dev/ptmx CHR             10,232          0t0      12724 /dev/kvm 0,9            0       6936 kvm-vm unix 0xffff88102b7c3c00          0t0      38288 socket unix 0xffff88102b7c2800          0t0      38289 socket REG               0,18         4024      38290 /dev/shm/spice.13468 IPv4              38293          0t0        TCP 127.0.0.1:5900 (LISTEN) REG              253,1 171825168384 1074520646 /var/lib/libvirt/images/ubuntu16.04-2.img 0,9            0       6936 kvm-vcpu 0,9            0       6936 kvm-vcpu 0,9            0       6936 kvm-vcpu 0,9            0       6936 kvm-vcpu 0,9            0       6936 kvm-vcpu 0,9            0       6936 kvm-vcpu 0,9            0       6936 kvm-vcpu 0,9            0       6936 kvm-vcpu unix 0xffff881026898000          0t0      40135 socket unix 0xffff88102689f400          0t0      40136 socket 0t0      40137 KOBJECT_UEVENT FIFO                0,8          0t0      40138 pipe FIFO                0,8          0t0      40138 pipe FIFO                0,8          0t0      40139 pipe FIFO                0,8          0t0      40139 pipe 0,9            0       6936 [timerfd] CHR              245,0          0t0      22111 /dev/vfio/30 CHR             10,196          0t0      11903 /dev/vfio/vfio 0,9            0       6936 kvm-vfio 0,9            0       6936 [vfio-device] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] unix 0xffff88102de37000          0t0      40140 /var/lib/libvirt/qemu/domain-2-ubuntu16.04-2/monitor.sock CHR            189,268          0t0      11444 /dev/bus/usb/003/013 CHR            189,267          0t0      11441 /dev/bus/usb/003/012 unix 0xffff88102d675c00          0t0      47483 socket unix 0xffff88102689a400          0t0      40142 socket unix 0xffff88102d674400          0t0      47488 socket unix 0xffff880e32a7a400          0t0      44457 socket unix 0xffff88102b200c00          0t0      45264 socket 0,9            0       6936 [eventfd] unix 0xffff8810392a1000          0t0      22123 socket 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 0,9            0       6936 [eventfd] 002: ID 8087:8000 Intel Corp. 001: ID 1d6b:0002 Linux Foundation 2.0 root hub 002: ID 8087:8008 Intel Corp. 001: ID 1d6b:0002 Linux Foundation 2.0 root hub 003: ID 1058:25da Western Digital Technologies, Inc. 002: ID 2109:8110 VIA Labs, Inc. Hub 001: ID 1d6b:0003 Linux Foundation 3.0 root hub 007: ID 0557:2419 ATEN International Co., Ltd 004: ID 0557:7000 ATEN International Co., Ltd Hub 015: ID 067b:2303 Prolific Technology, Inc. PL2303 Serial Port 013: ID 05dc:ba04 Lexar Media, Inc. 012: ID 0bda:0309 Realtek Semiconductor Corp. 009: ID 051d:0002 American Power Conversion Uninterruptible Power Supply 006: ID 1a40:0101 Terminus Technology Inc. Hub 011: ID 045e:000b Microsoft Corp. Natural Keyboard Elite 010: ID 046d:c016 Logitech, Inc. Optical Wheel Mouse 008: ID 0424:2514 Standard Microsystems Corp. USB 2.0 Hub 005: ID 0451:2046 Texas Instruments, Inc. TUSB2046 Hub 003: ID 05e3:0610 Genesys Logic, Inc. 4-port hub 002: ID 2109:2811 VIA Labs, Inc. Hub 001: ID 1d6b:0002 Linux Foundation 2.0 root hub sudo cat /etc/libvirt/qemu/ubuntu16.04-2.xml AN AUTO-GENERATED FILE. CHANGES TO IT ARE LIKELY TO BE LOST. Changes to this xml configuration should be made using: using the libvirt API.
<domain type='kvm'>
  <name>ubuntu16.04-2</name>
  <uuid>a9590ac8-e532-4dce-b6ef-d3b35c0db865</uuid>
  <memory unit='KiB'>8388608</memory>
  <currentMemory unit='KiB'>8388608</currentMemory>
  <vcpu placement='static' current='8'>12</vcpu>
  <os>
    <type arch='x86_64' machine='pc-i440fx-rhel7.3.0'>hvm</type>
    <boot dev='hd'/>
  </os>
  <features>
    <acpi/>
    <apic/>
  </features>
  <cpu mode='host-model'>
    <model fallback='allow'/>
  </cpu>
  <clock offset='utc'>
    <timer name='rtc' tickpolicy='catchup'/>
    <timer name='pit' tickpolicy='delay'/>
    <timer name='hpet' present='no'/>
  </clock>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>restart</on_crash>
  <pm>
    <suspend-to-mem enabled='no'/>
    <suspend-to-disk enabled='no'/>
  </pm>
  <devices>
    <emulator>/usr/libexec/qemu-kvm</emulator>
    <disk type='file' device='disk'>
      <driver name='qemu' type='raw'/>
      <source file='/var/lib/libvirt/images/ubuntu16.04-2.img'/>
      <target dev='vda' bus='virtio'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/>
    </disk>
    <disk type='file' device='cdrom'>
      <driver name='qemu' type='raw'/>
      <target dev='hda' bus='ide'/>
      <readonly/>
      <address type='drive' controller='0' bus='0' target='0' unit='0'/>
    </disk>
    <controller type='pci' index='0' model='pci-root'/>
    <controller type='ide' index='0'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
    </controller>
    <controller type='virtio-serial' index='0'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
    </controller>
    <controller type='usb' index='0' model='nec-xhci'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
    </controller>
    <controller type='usb' index='1' model='ich9-ehci1'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x0a' function='0x7'/>
    </controller>
    <interface type='network'>
      <mac address='52:54:00:fc:0f:5e'/>
      <source network='hostdev-net0'/>
      <model type='virtio'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
    </interface>
    <serial type='pty'>
      <target port='0'/>
    </serial>
    <console type='pty'>
      <target type='serial' port='0'/>
    </console>
    <channel type='spicevmc'>
      <target type='virtio' name='com.redhat.spice.0'/>
      <address type='virtio-serial' controller='0' bus='0' port='1'/>
    </channel>
    <input type='mouse' bus='ps2'/>
    <input type='keyboard' bus='ps2'/>
    <graphics type='spice' autoport='yes'>
      <listen type='address'/>
      <image compression='off'/>
    </graphics>
    <sound model='ich6'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
    </sound>
    <video>
      <model type='qxl' ram='65536' vram='65536' vgamem='16384' heads='1' primary='yes'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
    </video>
    <hostdev mode='subsystem' type='usb' managed='yes'>
      <source>
        <vendor id='0x05dc'/>
        <product id='0xba04'/>
      </source>
      <address type='usb' bus='0' port='3'/>
    </hostdev>
    <hostdev mode='subsystem' type='usb' managed='yes'>
      <source>
        <vendor id='0x0bda'/>
        <product id='0x0309'/>
      </source>
      <address type='usb' bus='0' port='4'/>
    </hostdev>
    <hostdev mode='subsystem' type='usb' managed='yes'>
      <source>
        <vendor id='0x067b'/>
        <product id='0x2303'/>
      </source>
      <address type='usb' bus='1' port='1'/>
    </hostdev>
    <redirdev bus='usb' type='spicevmc'>
      <address type='usb' bus='0' port='1'/>
    </redirdev>
    <redirdev bus='usb' type='spicevmc'>
      <address type='usb' bus='0' port='2'/>
    </redirdev>
    <memballoon model='virtio'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x0'/>
    </memballoon>
  </devices>
</domain>
[philipp@kvm1 ~]$
and here’s what I see on the guest:
philipp@ubuntu16:~$ lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 0bda:0309 Realtek Semiconductor Corp. 
Bus 001 Device 002: ID 05dc:ba04 Lexar Media, Inc. 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
philipp@ubuntu16:~$
I’m not sure what I’m missing.
How do I verify that the parameters in the .xml domain definition are correct, and that they’re resulting in the correct args being passed to qemu-kvm when it gets exec’d?
And why do the args:
-device usb-host,hostbus=3,hostaddr=15,id=hostdev3,bus=usb1.0,port=1
seem to be silently ignored?  I understand that USB is inherently pluggable and hence the device may or may not be present at the time that Qemu gets kicked off…
Looking at https://github.com/esminc/qemu/blob/master/Source/device-qemu/android/androi... it claims that the PL2303 driver is supported.
What am I missing?  I need to access serial ports from several of my guest VMs, and my host doesn’t have built-in serial ports to USB dongles are my only option.
Thanks,
-Philip

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[CentOS-virt] Issues with exposing USB serial dongle to guest VM