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Bug 949505 - Assign 3.0 usb device to ehci and uhci or usb hub got applied anyway with warning but fails to function
Summary: Assign 3.0 usb device to ehci and uhci or usb hub got applied anyway with war...
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: qemu-kvm
Version: 7.0
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: rc
: ---
Assignee: Gerd Hoffmann
QA Contact: Virtualization Bugs
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2013-04-08 10:05 UTC by Shaolong Hu
Modified: 2014-06-18 03:26 UTC (History)
8 users (show)

Fixed In Version: qemu-kvm-1.5.0-1.el7
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2014-06-13 11:56:59 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)

Description Shaolong Hu 2013-04-08 10:05:43 UTC 
Description of problem:
----------------------------
As subject.


Version-Release number of selected component (if applicable):
--------------------------------------------------------------
qemu-kvm-1.4.0-1.el7.x86_64


How reproducible:
------------------
100%

Steps to Reproduce:
---------------------------
1.boot guest with:

/usr/libexec/qemu-kvm -enable-kvm -smp 4 -m 4G -name rhel6.3-64 -uuid 3f2ea5cd-3d29-48ff-aab2-23df1b6ae213 -drive file=nfs/RHEL-Server-7.0-64-virtio.qcow2,cache=none,if=none,rerror=stop,werror=stop,id=drive-virtio-disk0,format=qcow2 -device virtio-blk-pci,drive=drive-virtio-disk0,id=device-virtio-disk0 -boot menu=on -monitor stdio -chardev socket,id=s1,path=/tmp/s1,server,nowait -device isa-serial,chardev=s1 -monitor tcp::1234,server,nowait -spice disable-ticketing,port=5920 -global PIIX4_PM.disable_s3=0 -global PIIX4_PM.disable_s4=0 -vga qxl -global qxl-vga.vram_size=33554432 -qmp tcp:0:5555,server,nowait -netdev tap,script=/etc/qemu-ifup,id=netdev0,vhost=on,queues=4,vhostforce=off -device virtio-net-pci,netdev=netdev0,id=device-net0,mac=aa:54:00:11:22:33,vectors=9,mq=on -vnc :10 -device nec-usb-xhci,id=xhci -drive file=disk,if=none,id=drive-usb-0-0,media=disk,format=qcow2,cache=none,aio=native -device usb-storage,drive=drive-usb-0-0,id=usb-0-0,removable=on,bus=xhci.0,port=1,bootindex=1 -device usb-ehci,id=ehci -drive file=disk2,if=none,id=drive-usb-0-1,media=disk,format=qcow2,cache=none,aio=native -device usb-storage,drive=drive-usb-0-1,id=usb-0-1,removable=off,bus=ehci.0,port=1 -usb -device usb-tablet,id=input1,bus=usb-bus.0,port=1 -device usb-hub,bus=usb-bus.0,port=2,id=hub

2.

(qemu) device_add usb-host,hostbus=9,hostaddr=2,id=usb3.0,bus=usb-bus.0,port=2.1
(qemu) device_add usb-host,hostbus=10,hostaddr=2,id=usb4.0,bus=usb-bus.0,port=2.2
Warning: speed mismatch trying to attach usb device host:10.2 to bus usb-bus.0
(qemu) qemu-kvm: Warning: speed mismatch trying to attach usb device host:10.2 to bus usb-bus.0
qemu-kvm: Warning: speed mismatch trying to attach usb device host:10.2 to bus usb-bus.0

3. it got applied anyway

(qemu) info usb
  Device 0.2, Port 1, Speed 12 Mb/s, Product QEMU USB Tablet
  Device 0.3, Port 2, Speed 12 Mb/s, Product QEMU USB Hub
  Device 0.4, Port 2.1, Speed 480 Mb/s, Product DT 101 G2
  Device 0.0, Port 2.2, Speed 5000 Mb/s, Product host:10.2
  Device 1.2, Port 1, Speed 5000 Mb/s, Product QEMU USB MSD
  Device 2.2, Port 1, Speed 480 Mb/s, Product QEMU USB MSD

4. the same to ehci

 
Actual results:
-----------------
3.0 usb disk can not even be recognized in guest, reject these kind of actions should be fine.
Comment 2 Sibiao Luo 2013-04-08 12:59:05 UTC 
You hot-plug the first one is USB2.0 stick device and the second one is USB3.0 device.
As according to bug 921483 comment #5 that USB3.0 stick must be passed through using ehci (or xhci) and USB2.0 stick which support 1.1 controller and ehci. So i think the QEMU prompt that 'Warning: speed mismatch' is correctly and can not be recognized in guest, but both of the two USB sticks should work well on EHCI controller.

Best Regards.
sluo
Comment 3 Gerd Hoffmann 2013-04-15 09:29:41 UTC 
Hook them directly to ehci ports, not via hub,
the qemu usb-hub does not support usb 2.0.
Comment 4 Shaolong Hu 2013-04-18 07:44:57 UTC 
(In reply to comment #3)
> Hook them directly to ehci ports, not via hub,
> the qemu usb-hub does not support usb 2.0.

(qemu) device_add usb-host,hostbus=10,hostaddr=2,id=usb3.0,bus=ehci.0,port=2
Warning: speed mismatch trying to attach usb device host:10.2 to bus ehci.0
(qemu) qemu-kvm: Warning: speed mismatch trying to attach usb device host:10.2 to bus ehci.0
qemu-kvm: Warning: speed mismatch trying to attach usb device host:10.2 to bus ehci.0

(qemu) info usb
  Device 0.2, Port 1, Speed 12 Mb/s, Product QEMU USB Tablet
  Device 0.3, Port 2, Speed 12 Mb/s, Product QEMU USB Hub
  Device 1.2, Port 1, Speed 5000 Mb/s, Product QEMU USB MSD
  Device 2.2, Port 1, Speed 480 Mb/s, Product QEMU USB MSD
  Device 2.0, Port 2, Speed 5000 Mb/s, Product host:10.2


in guest, the 3.0 disk can not be detect:

[root@localhost ~]# lsusb
Bus 001 Device 002: ID 46f4:0001  
Bus 002 Device 002: ID 0627:0001 Adomax Technology Co., Ltd 
Bus 002 Device 003: ID 0409:55aa NEC Corp. Hub
Bus 004 Device 002: ID 46f4:0001  
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub


passthrough usb 3.0 disk to ehci can not work neither.


to compare, passthrough 3.0 disk to xhci, works correctly:

(qemu) device_add usb-host,hostbus=10,hostaddr=2,id=usb3.0,bus=xhci.0,port=2

(qemu) info usb
  Device 0.2, Port 1, Speed 12 Mb/s, Product QEMU USB Tablet
  Device 0.3, Port 2, Speed 12 Mb/s, Product QEMU USB Hub
  Device 1.2, Port 1, Speed 5000 Mb/s, Product QEMU USB MSD
  Device 1.3, Port 2, Speed 5000 Mb/s, Product host:10.2
  Device 2.2, Port 1, Speed 480 Mb/s, Product QEMU USB MSD

in guest, the CompUSA one is the 3.0 disk:

[root@localhost ~]# lsusb
Bus 001 Device 002: ID 46f4:0001  
Bus 002 Device 002: ID 0627:0001 Adomax Technology Co., Ltd 
Bus 002 Device 003: ID 0409:55aa NEC Corp. Hub
Bus 004 Device 002: ID 46f4:0001  
Bus 004 Device 003: ID 1516:6221 CompUSA 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Comment 5 Gerd Hoffmann 2013-04-18 12:09:29 UTC 
Ok, trying to sort things here:

There is one usb 2.0 stick.
There is one usb 3.0 stick.

The usb 2.0 stick should work on ehci + xhci (root port only).
The usb 3.0 stick should work on xhci (root port only too).

Plugging the usb 3.0 stick into a usb 2.0 port on the host machine (which effectively forces it into 2.0 mode) might make the 3.0 stick work on ehci too.

In case of a speed mismatch the usb device will simply not show up in the guest, so this is expected behavior.
Comment 6 Gerd Hoffmann 2013-05-14 12:38:48 UTC 
Well, nothing is really broken here.  qemu 1.5 will have more detailed speed mismatch error messages (commit 3b7e759a4110690c9617b1ffa6a7c96a343a330d), so usability will be improved a bit.  I'll go set this to modified so qa can have a look at the new messages.
Comment 7 Miroslav Rezanina 2013-05-23 12:08:59 UTC 
Build in qemu-kvm-1.5.0-1.el7
Comment 9 Shaolong Hu 2014-01-26 10:47:06 UTC 
Verified on qemu-kvm-rhev-1.5.3-39.el7.x86_64:

(qemu) device_add usb-host,hostbus=10,hostaddr=2,id=usb3.0,bus=usb-bus.0,port=2.1
Warning: speed mismatch trying to attach usb device "" (super speed) to bus "usb-bus.0", port "2.1" (full speed)
(qemu) qemu-kvm: Warning: speed mismatch trying to attach usb device "" (super speed) to bus "usb-bus.0", port "2.1" (full speed)
qemu-kvm: Warning: speed mismatch trying to attach usb device "" (super speed) to bus "usb-bus.0", port "2.1" (full speed)


(qemu) device_add usb-host,hostbus=10,hostaddr=2,id=usb3.0,bus=ehci.0
Warning: speed mismatch trying to attach usb device "" (super speed) to bus "ehci.0", port "1" (high speed)
(qemu) qemu-kvm: Warning: speed mismatch trying to attach usb device "" (super speed) to bus "ehci.0", port "1" (high speed)
qemu-kvm: Warning: speed mismatch trying to attach usb device "" (super speed) to bus "ehci.0", port "1" (high speed)



To be noticed: there are three same warnings every time.
Comment 10 Ludek Smid 2014-06-13 11:56:59 UTC 
This request was resolved in Red Hat Enterprise Linux 7.0.

Contact your manager or support representative in case you have further questions about the request.
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