Bug 708927

Summary: Qemu-KVM always starting VM with core2duo processor
Product: [Fedora] Fedora Reporter: Vincent passaro <vincent.passaro>
Component: qemuAssignee: Fedora Virtualization Maintainers <virt-maint>
Status: CLOSED DUPLICATE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: unspecified    
Version: 15CC: amit.shah, berrange, dwmw2, ehabkost, itamar, jarkko.torvinen, jaswinder, jforbes, k.georgiou, knoel, mkletzan, ondrejj, scottt.tw, tburke, virt-maint
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2012-03-19 10:52:38 EDT Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Description Vincent passaro 2011-05-30 03:35:36 EDT
Description of problem: Configured Windows7 virtual machine with Westmere CPU in Virtual Machine Manager, but ps + iotop shows qemu always using the core2duo setting.

Version-Release number of selected component (if applicable):


How reproducible:  ALWAYS

Steps to Reproduce:
1. Create Virtual Machine
2. Set CPU to Westmere (or other)
3. Run virtual machine
4. ps -ef | grep -i qemu
5. qemu-kvm shows cpu as core2duo instead of Westmere.
Actual results:  core2duo as qemu-kvm flag

Expected results:  Westmere as qemu-kvm flag

Additional info:

Output from PS:

qemu     19566     1 25 00:03 ?        00:05:02 /usr/bin/qemu-kvm -S -M pc-0.14 -cpu core2duo

Output from /etc/libvirt/qemu/Windoz7.xml

<cpu match='exact'>
    <feature policy='require' name='tm2'/>
    <feature policy='require' name='est'/>
    <feature policy='require' name='monitor'/>
    <feature policy='require' name='ss'/>
    <feature policy='require' name='vme'/>
    <feature policy='require' name='rdtscp'/>
    <feature policy='require' name='ht'/>
    <feature policy='require' name='ds'/>
    <feature policy='require' name='pbe'/>
    <feature policy='require' name='tm'/>
    <feature policy='require' name='vmx'/>
    <feature policy='require' name='ds_cpl'/>
    <feature policy='require' name='xtpr'/>
    <feature policy='require' name='acpi'/>
Comment 1 Vincent passaro 2011-05-30 03:59:18 EDT
Also verified that RHEL 6 guest gets core2duo CPU when Westmere is selected.
Comment 2 Jarkko Torvinen 2011-05-30 04:27:57 EDT
I can also verify this. I have a i7 cpu and if I "copy host cpu configuration" it sets it to "Westmere" but when running ps shows -cpu core2duo

If I run qemu-kvm with -cpu Westmere I get an error message:
Unable to find x86 CPU definition
Comment 3 Justin M. Forbes 2011-06-22 10:05:35 EDT
Westmere is not a defined -cpu in qemu for F15.  Available options for -cpu can be seen with qemu -cpu ?:

x86           [n270]
x86         [athlon]
x86       [pentium3]
x86       [pentium2]
x86        [pentium]
x86            [486]
x86        [coreduo]
x86          [kvm32]
x86         [qemu32]
x86          [kvm64]
x86       [core2duo]
x86         [phenom]
x86         [qemu64]

Though perhaps libvirt shouldn't try to set unsupported -cpu flags.
Comment 4 Vincent passaro 2011-12-08 15:14:55 EST
This is still happening in Fedora 16
Comment 5 Fedora Admin XMLRPC Client 2012-03-15 13:53:09 EDT
This package has changed ownership in the Fedora Package Database.  Reassigning to the new owner of this component.
Comment 6 Martin Kletzander 2012-03-19 10:52:38 EDT

*** This bug has been marked as a duplicate of bug 804224 ***