Bug 1175215

Summary:	Guest should not be booted if we specify the devices we do not plan to support with -M (Tracking)
Product:	Red Hat Enterprise Linux 7	Reporter:	juzhang <juzhang>
Component:	qemu-kvm-rhev	Assignee:	Hai Huang <hhuang>
Status:	CLOSED CURRENTRELEASE	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	7.1	CC:	dyuan, huding, knoel, michen, pbonzini, virt-maint, xfu
Target Milestone:	rc	Keywords:	Tracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:
Clones:	1235771 (view as bug list)		Environment:
Last Closed:	2015-09-28 16:52:08 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:	1175099
Bug Blocks:

Description juzhang 2014-12-17 10:32:06 UTC

Description of problem:
Guest could be booted if we specify rhel7.1 new feature with -M RHEL7.0/RHEL6.x on rhel7.1 host. Consequences might have 
1. From end user pov, boot successfully means we support it, however, we do not fully support new features under older machine type.

2. https://bugzilla.redhat.com/show_bug.cgi?id=1175099 and Bug 1172643 - migration/pci-bridge: 7.1rhev->7.0 fails

Version-Release number of selected component (if applicable):
qemu-kvm-rhev-2.1.2-17.el7

How reproducible:
100%

Steps to Reproduce:
1.Boot guest with pci bridge or ovmf with -M rhel6.x on rhel7.1 host
2.
3.

Actual results:
Guest could be booted successfully but migration fail 

Expected results:
Guest should not be booted if we specify the devices we do not plan to support with -M


Additional info:

Comment 1 Paolo Bonzini 2014-12-19 14:00:53 UTC

PCI bridges were tech preview, so there's no problem in not supporting migration.  AHCI will probably be the same when we start supporting Q35 fully.

For OVMF probably the bug should not be closed, but just deferred to 7.2.  I'm reopening bug 1175099.

In any case, QE is already opening bug when they find new stuff not working on old machine types.  Changing this to a tracker.

Comment 2 Paolo Bonzini 2015-09-28 16:52:08 UTC

All dependent bugs verified.