Bug 1410674

Summary:	qemu: Remove unnecessary EHCI implementation for Power
Product:	Red Hat Enterprise Linux 7	Reporter:	David Gibson <dgibson>
Component:	qemu-kvm-rhev	Assignee:	David Gibson <dgibson>
Status:	CLOSED ERRATA	QA Contact:	Xujun Ma <xuma>
Severity:	medium	Docs Contact:
Priority:	unspecified
Version:	7.4	CC:	michen, mrezanin, qzhang, thuth, virt-maint, xuma, zhengtli
Target Milestone:	rc
Target Release:	---
Hardware:	ppc64le
OS:	Unspecified
Whiteboard:
Fixed In Version:	qemu-kvm-rhev-2.8.0-2.el7	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:
Clones:	1436054 (view as bug list)		Environment:
Last Closed:	2017-08-01 23:42:15 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:	1386113, 1436054

Description David Gibson 2017-01-06 04:29:44 UTC

Description of problem:

The Power build of qemu, like the x86 build, includes the EHCI USB controller. The EHCI is not terribly well tested on Power - neither the qemu emulation nor the guest side driver.  We've hit some problems with EHCI in the past which have gone away with XHCI.  In particular EHCI's expectation of a companion controller for USB1 devices adds a bunch of extra confusion and complication.

There's really no reason to ever use an EHCI instead of an XHCI on Power guests, so to reduce dev and test workload, remove the EHCI controller from qemu-kvm-rhev.

Comment 1 Miroslav Rezanina 2017-01-16 12:16:43 UTC

Fix included in qemu-kvm-rhev-2.8.0-2.el7

Comment 3 Xujun Ma 2017-04-24 10:26:09 UTC

List usb controller in qemu-kvm-rhev-2.6.0-28.el7_3.9.ppc64le
/usr/libexec/qemu-kvm -device help
USB devices:
name "ich9-usb-ehci1", bus PCI
name "ich9-usb-ehci2", bus PCI
name "nec-usb-xhci", bus PCI
name "pci-ohci", bus PCI, desc "Apple USB Controller"
name "sysbus-ohci", bus System, desc "OHCI USB Controller"
name "usb-ehci", bus PCI

List usb controller in qemu-kvm-rhev-2.9.0-1.el7.ppc64le
USB devices:
name "nec-usb-xhci", bus PCI
name "pci-ohci", bus PCI, desc "Apple USB Controller"
name "qemu-xhci", bus PCI
name "sysbus-ohci", bus System, desc "OHCI USB Controller"

Try to run qemu cmdline with ehci controller with qemu-kvm-rhev-2.9.0-1.el7.ppc64le
[root@ibm-p8-kvm-02-qe xuma]# /usr/libexec/qemu-kvm -device ich9-usb-ehci1
qemu-kvm: -device ich9-usb-ehci1: 'ich9-usb-ehci1' is not a valid device model name
[root@ibm-p8-kvm-02-qe xuma]# /usr/libexec/qemu-kvm -device ich9-usb-ehci2
qemu-kvm: -device ich9-usb-ehci2: 'ich9-usb-ehci2' is not a valid device model name
[root@ibm-p8-kvm-02-qe xuma]# /usr/libexec/qemu-kvm -device usb-ehci
qemu-kvm: -device usb-ehci: 'usb-ehci' is not a valid device model name

Base results above ,the ehci controllers have been remove from qemu-2.9.

Comment 5 errata-xmlrpc 2017-08-01 23:42:15 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2017:2392

Comment 6 errata-xmlrpc 2017-08-02 01:19:54 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2017:2392

Comment 7 errata-xmlrpc 2017-08-02 02:11:53 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2017:2392

Comment 8 errata-xmlrpc 2017-08-02 02:52:40 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2017:2392

Comment 9 errata-xmlrpc 2017-08-02 03:17:22 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2017:2392