[Qemu-devel] [Bug 897466] Re: UHCI Host Controller no longer present with -usb

[Serge Hallyn]

Reproduced with today's qemu git head as well.

** Also affects: qemu
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/897466

Title:
  UHCI Host Controller no longer present with -usb

Status in QEMU:
  New
Status in “qemu-kvm” package in Ubuntu:
  Confirmed
Status in “qemu-kvm” source package in Precise:
  Confirmed

Bug description:
  If on an up to date 12.04 install and I start a VM with:
  $ qemu -m 192 -serial none -chardev null,id=chardevmon -pidfile /tmp/pid 
-daemonize -nographic -monitor tcp:127.0.0.1:4444,server,nowait -net 
user,hostfwd=tcp:127.0.0.1:4422-:22 -usb -rtc base=utc -name qatest-vm -uuid 
ded3a46b-bb60-43f4-8113-d041aeb93cdf -hda libvirt/qatest/qatest.qcow2

  Then use the 'info usbhost' in the monitor, I get:
  $ echo 'info usbhost' | nc -q 1 127.0.0.1 4444
  (qemu) info usbhost
  husb: using sys file-system with /dev/bus/usb
  $

  In Oneiric and eariler, 'info usbhost' would show a UHCI Host Controller. Eg:
  $ qemu -m 192 -serial none -chardev null,id=chardevmon -pidfile /tmp/pid 
-daemonize -nographic -monitor tcp:127.0.0.1:4444,server,nowait -net 
user,hostfwd=tcp:127.0.0.1:4422-:22 -usb -rtc base=utc -name qatest-vm -uuid 
ded3a46b-bb60-43f4-8113-d041aeb93cdf -hda libvirt/qatest/qatest.qcow2
  $ echo 'info usbhost' | nc -q 1 127.0.0.1 4444
  QEMU 0.14.1 monitor - type 'help' for more information
  (qemu) info usbhost
  husb: using sys file-system with /dev/bus/usb
    Device 1.1, speed 12 Mb/s
      Hub: USB device 1d6b:0001, UHCI Host Controller

  This breaks QRT/scripts/test-qemu.py and appears to be a regression,
  but I am not sure if it is a 3.2 kernel issue or a 0.14.1 vs 0.15
  issue. I should mention this is happening with qemu without /dev/kvm
  available (ie, I am running test-qemu.py in an up to date precise VM).

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