Bug 1163046

Summary:	qemu-kvm should quit when usb-host hit speed mismatch
Product:	Red Hat Enterprise Linux 7	Reporter:	Jun Li <juli>
Component:	qemu-kvm-rhev	Assignee:	Gerd Hoffmann <kraxel>
Status:	CLOSED DUPLICATE	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	high	Docs Contact:
Priority:	medium
Version:	7.0	CC:	hhuang, juzhang, knoel, michen, qzhang, virt-maint, xfu
Target Milestone:	rc
Target Release:	---
Hardware:	x86_64
OS:	All
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:
Clones:	1163048 1217326 (view as bug list)		Environment:
Last Closed:	2016-06-13 12:53:49 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	1163048, 1217326

Description Jun Li 2014-11-12 10:03:38 UTC

Description of problem:
When boot qemu-kvm with usb-host hit a speed mismatch, qemu-kvm should quit.

Currently, it will just give some warning in HMP, can not capture any warning via QMP.

BTW, also test with virt-manager, it will hit this issue, too. So mark this bz as high Severity.

Version-Release number of selected component (if applicable):
qemu-kvm-rhev-2.1.2-6.el7.x86_64

How reproducible:
100%

Steps to Reproduce:
1.boot guest with a usb-host device. cli as followings:
# /usr/libexec/qemu-kvm -monitor stdio -device ich9-usb-ehci1,id=ehci0 -device usb-host,hostbus=1,hostaddr=12,id=usb-kbd,bus=ehci0.0 -qmp tcp::8888,server,nowait
2.
3.

Actual results:
Just give some warning:
qemu-kvm: Warning: speed mismatch trying to attach usb device "Dell USB Entry Keyboard" (( speed) to bus "ehci0.0", port "1" (high speed)
qemu-kvm: Warning: speed mismatch trying to attach usb device "Dell USB Entry Keyboard" (( speed) to bus "ehci0.0", port "1" (high speed)
qemu-kvm: Warning: speed mismatch trying to attach usb device "Dell USB Entry Keyboard" (( speed) to bus "ehci0.0", port "1" (high speed)

Expected results:
One of the following methods is ok for QE.
1, should forbid to boot qemu-kvm when hit speed mismatch.
2, give some warning via QMP, so libvirt can detect this info.

Additional info:

Comment 2 Gerd Hoffmann 2014-11-12 15:01:33 UTC

usb device attach runs asyncrounously, because qemu supports hotplugging usb devices.  So we can neither exit() nor return qmp errors.

We could add some qmp events emitted by usb-host to notify libvirt about errors (and possily attach/detach too).

Needs discission upstream, don't think targeting 7.1 is realistic.

Comment 4 Gerd Hoffmann 2015-04-30 15:46:43 UTC

Related: bug 1179045

Comment 7 Gerd Hoffmann 2016-06-13 12:53:49 UTC

(In reply to Gerd Hoffmann from comment #4)
> Related: bug 1179045

Planned 1179045 fix will handle this one too.

*** This bug has been marked as a duplicate of bug 1179045 ***