Bug 770844

Summary: Host CPU detection doesn't work
Product: [Fedora] Fedora Reporter: techtonik
Component: qemuAssignee: Justin M. Forbes <jforbes>
Status: CLOSED NOTABUG QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: unspecified    
Version: 16CC: amit.shah, bazanluis20, berrange, dougsland, dwmw2, ehabkost, itamar, jaswinder, jforbes, knoel, scottt.tw, tburke, virt-maint
Target Milestone: ---   
Target Release: ---   
Hardware: i686   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2012-01-27 19:22:28 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description techtonik 2011-12-29 15:18:05 UTC 
Description of problem:
QEMU doesn't detect Core 2 Duo CPU.

Version-Release number of selected component (if applicable):
QEMU emulator version 0.15.1 (qemu-kvm-0.15.1) / qemu i686, 0.15.1-3.fc16

How reproducible:
Always.

Steps to Reproduce:
1.cat /proc/cpuinfo | grep model
2.qemu -cpu host -hda image.qcow -m 256
3.qemu -cpu ?
  
Actual results:
$ cat /proc/cpuinfo | grep model
model		: 23
model name	: Intel(R) Core(TM)2 Duo CPU     P8600  @ 2.40GHz
model		: 23
model name	: Intel(R) Core(TM)2 Duo CPU     P8600  @ 2.40GHz
$ qemu -cpu host -hda image.qcow -m 256
Unable to find x86 CPU definition
$ 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]

Expected results:
QEMU started.
Comment 1 Justin M. Forbes 2012-01-27 19:22:28 UTC 
-cpu host is only supported under qemu-kvm.  If you call with 'qemu-kvm -cpu host -hda image.qcow -m 256' it will work.