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[libvirt] can't get right capabilities


I am trying to use x86 machine to create VMs.
But one error occurs.

[root mcd kvm-test]# virsh create test.xml
error: Failed to create domain from test.xml
error: unknown OS type hvm

My xml file is as the following:

<domain type='kvm'>
          <type arch='x86_64' machine='pc'>hvm</type>
      <clock offset='utc'/>
          <disk type='file' device='disk' >
              <driver name='qemu' type='raw'/>
              <source file='/home/zhlbj/kvm-test/disk1'/>
              <target dev='sda' bus='scsi'/>
          <interface type='bridge'>
               <source bridge='virbr0'/>
               <mac address='52:54:00:19:bc:0c'/>
          <serial type='pty'>
             <target port='0'/>
          <console type='pty'>
             <target type='serial' port='0'/>
          <memballoon model="none"/>

I check kvm module, it is available.

[root mcd kvm-test]# lsmod |grep kvm
kvm_intel             119308  4
kvm                   344876  1 kvm_intel

But I tried the capabilities, it is not right.
There is no guest capabilities.


      <topology sockets='1' cores='4' threads='1'/>
      <feature name='rdtscp'/>
      <feature name='avx'/>
      <feature name='osxsave'/>
      <feature name='xsave'/>
      <feature name='tsc-deadline'/>
      <feature name='x2apic'/>
      <feature name='pdcm'/>
      <feature name='xtpr'/>
      <feature name='tm2'/>
      <feature name='est'/>
      <feature name='smx'/>
      <feature name='vmx'/>
      <feature name='ds_cpl'/>
      <feature name='monitor'/>
      <feature name='dtes64'/>
      <feature name='pclmuldq'/>
      <feature name='pbe'/>
      <feature name='tm'/>
      <feature name='ht'/>
      <feature name='ss'/>
      <feature name='acpi'/>
      <feature name='ds'/>
      <feature name='vme'/>


This problem occurs some times.
When I tried to find this problem, it didn't occur.
Now it occurs again. It's a little strange.

Is there anything I miss?

Best Regards

IBM LTC, China System&Technology Lab, Beijing

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