windows - Fail to open software in kvm guest -

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i can not open software in windows server 2008 kvm guest.

i can find process in task manager when open software , disappear after 2 or 3 seconds.

the process not disappear when pin vcpu physical cpu, still can't open software.

i had found 3 softwares work case. work fine in physical server.

i had tried windows server 2008, windows server 2003 , windows 7.

i had tried use host-passthrough, host-model , qemu64 cpu model.

it bug or used in wrong way?

qemu version:

/root/qemu25/qemu/x86_64-softmmu/qemu-system-x86_64 --version

qemu emulator version 2.5.1.1, copyright (c) 2003-2008 fabrice bellard

my libvirt:

<domain type="kvm" xmlns:qemu="http://libvirt.org/schemas/domain/qemu/1.0">   <name>testvm</name>   <os>     <type>hvm</type>     <boot dev='hd'/>     <boot dev='cdrom'/>   </os>   <features>     <acpi/>     <apic/>     <pae/>   </features>   <clock offset="localtime"/>   <on_poweroff>destroy</on_poweroff>   <on_reboot>restart</on_reboot>   <on_crash>destroy</on_crash>   <vcpu current="1">1</vcpu>   <cpu mode="host-passthrough"/>   <memory>4194304</memory>   <currentmemory>4194304</currentmemory>   <devices>    <emulator>/root/qemu25/qemu/x86_64-softmmu/qemu-system-x86_64</emulator>     <disk device="disk" type="file">       <driver name="qemu" type="qcow2"/>       <source file="/root/vm/disk.qcow2"/>       <target bus="virtio" dev="vda"/>     </disk>     <disk type='file' device='cdrom'>       <source file=''/>       <target dev='hdc' bus='ide'/>     </disk>     <serial type="pty">       <source path="/dev/pts/1"/>       <target port="0"/>     </serial>    <interface type='bridge'>       <mac address='fa:16:3e:81:00:01'/>       <source bridge='virbr0'/>       <model type='virtio'/>       <driver name='qemu'/>       <alias name='net0'/>     </interface>     <channel type='unix'>       <source mode='bind'/>       <target type='virtio' name='org.qemu.guest_agent.0'/>     </channel>     <input type="tablet" bus="usb"/>     <input type="mouse" bus="ps2"/>     <graphics type="vnc" port="-1" autoport="yes" keymap="en-us" listen="0.0.0.0"/>   </devices>   <qemu:commandline>     <qemu:arg value='-machine'/>     <qemu:arg value='smm=off'/>   </qemu:commandline> </domain>


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