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Bug 1422967

Summary:	Switch to generic PCIe root port device for AArch64 guest VM
Product:	Red Hat Enterprise Linux 7	Reporter:	Wei Huang (AMD) <wehuang>
Component:	qemu-kvm-rhev	Assignee:	Wei Huang (AMD) <wehuang>
Status:	CLOSED CURRENTRELEASE	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	7.4-Alt	CC:	abologna, chayang, drjones, hhuang, juzhang, michen, mrezanin, qzhang, virt-maint, wehuang
Target Milestone:	rc	Keywords:	OtherQA
Target Release:	---
Hardware:	aarch64
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2017-06-26 16:09:32 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:	1390316, 1408808
Bug Blocks:	1173755

Description Wei Huang (AMD) 2017-02-16 16:45:19 UTC

There was a generic PCIe root port device introduced in QEMU 2.9 by Marcel. This new root port behaves almost the same as the Intel's IOH device with id 3420, without having Intel specific attributes. RHEL for ARM will switch to this generic device beyond 7.3.

When qemu-rhev is re-based to 2.9, we need to remove Intel IOH devices with proper settings for compatibility and make sure PCIe root port device work with libvirt.

Related Commits:
* f7d6f3fac8d

Comment 1 Andrea Bolognani 2017-06-13 02:20:18 UTC

Not sure why we even have a qemu-kvm-rhev bug about this :)

AFAIK QEMU will not create PCIe Root Ports unless explicitly
instructed to do so, which means that there is no default.

Moreover, the libvirt part (Bug 1408808) has already been
taken care of, so all guests created through libvirt will
use the generic PCIe Root Ports without user intervention.

Comment 2 Andrea Bolognani 2017-06-26 13:32:40 UTC

Hai, please see Comment 1 :)