Created attachment 1197836 [details]
win10-q35

Description of problem:
Processor device can't be seen in win10 guest which has machine type 'pc-q35-rhel7.3.0'

Version-Release number of selected component (if applicable):
qemu-kvm-rhev-2.6.0-22.el7.x86_64
libvirt-2.0.0-6.el7.x86_64
kernel:3.10.0-495.el7.x86_64

How reproducible:
100%

Steps to Reproduce:
1.check cpu info for host
# virsh capabilities
<capabilities>

  <host>
    <uuid>98eb1f80-d898-11e1-b040-24be05109f18</uuid>
    <cpu>
      <arch>x86_64</arch>
      <model>IvyBridge</model>
      <vendor>Intel</vendor>
      <topology sockets='1' cores='4' threads='2'/>
      <feature name='ds'/>
      <feature name='acpi'/>
      <feature name='ss'/>
      <feature name='ht'/>
      <feature name='tm'/>
      <feature name='pbe'/>
      <feature name='dtes64'/>
      <feature name='monitor'/>
      <feature name='ds_cpl'/>
      <feature name='vmx'/>
      <feature name='smx'/>
      <feature name='est'/>
      <feature name='tm2'/>
      <feature name='xtpr'/>
      <feature name='pdcm'/>
      <feature name='pcid'/>
      <feature name='osxsave'/>
      <feature name='arat'/>
      <feature name='xsaveopt'/>
      <feature name='invtsc'/>
      <pages unit='KiB' size='4'/>
      <pages unit='KiB' size='2048'/>
    </cpu>  
......
  <guest>
    <os_type>hvm</os_type>
    <arch name='i686'>
      <wordsize>32</wordsize>
      <emulator>/usr/libexec/qemu-kvm</emulator>
      <machine maxCpus='240'>pc-i440fx-rhel7.3.0</machine>
      <machine canonical='pc-i440fx-rhel7.3.0' maxCpus='240'>pc</machine>
      <machine maxCpus='240'>pc-i440fx-rhel7.0.0</machine>
      <machine maxCpus='240'>rhel6.3.0</machine>
      <machine maxCpus='240'>rhel6.4.0</machine>
      <machine maxCpus='240'>rhel6.0.0</machine>
      <machine maxCpus='240'>pc-i440fx-rhel7.1.0</machine>
      <machine maxCpus='240'>pc-i440fx-rhel7.2.0</machine>
      <machine maxCpus='240'>pc-q35-rhel7.3.0</machine>
      <machine canonical='pc-q35-rhel7.3.0' maxCpus='240'>q35</machine>
      <machine maxCpus='240'>rhel6.5.0</machine>
      <machine maxCpus='240'>rhel6.6.0</machine>
      <machine maxCpus='240'>rhel6.1.0</machine>
      <machine maxCpus='240'>rhel6.2.0</machine>
      <domain type='qemu'/>
      <domain type='kvm'>
        <emulator>/usr/libexec/qemu-kvm</emulator>
      </domain>
    </arch>
    <features>
      <cpuselection/>
      <deviceboot/>
      <disksnapshot default='on' toggle='no'/>
      <acpi default='on' toggle='yes'/>
      <apic default='on' toggle='no'/>
      <pae/>
      <nonpae/>
    </features>
  </guest>
......


2.Prepare a win10 guest which has machine type 'pc-q35-rhel7.3.0'
3.Open device manager after logging into the guest and click 'show hidden devices' and then find there is no processor device,pls refer to sceenshot 'win10-q35'


Actual results:
As above description

Expected results:
Processor device can be seen in win10 guest which has machine type 'pc-q35-rhel7.3.0'

Additional info:
1.Processor device shows normal in win7 guest which has machine type 'pc-q35-rhel7.3.0',pls refer to screenshot 'win7-q35'
2.Although processor device could be seen in win10 guest which has machine type 'pc-i440fx-rhel7.3.0', the status shows gray,pls refer to screenshut "win10-i440fx-rhel7.3.0".If win10 guest has machine type 'pc-i440fx-rhel7.2.0', the process device shows black which is normal status,,pls refer to screenshut "win10-i440fx-rhel7.2.0"