kvm平台上支持的虚拟机操作系统列表：
Win-7-Ultimate-x86_32
Win-7-Pro-x86_32
Win-7-Home-x86_32
Win-7-EP-x86_32
Win-7-x86_64
ubuntu-12.04-server_x64
Win-XP-SP1-x86_64-EN
Win-XP-SP1-x86_32
Win7-Pro-x86_64
Win7-EP-x86_64
Win7-Home-x86_64
RHEL6.2-x86_64-Kernel_3.4.4
RHEL6.2-x86_64-Kernel_2.6.32
Windows_XP_Professional_sp1_x86
ubuntu12.04-desktop
CentOs-6.2-X86_64
Win-2003-x86_32
Win-2008-x86_32
Win-XP-X86_32
Windows2008R2-x86_64
ubuntu11.10server-x86_64
PS：摘自内部云平台，目前有22个
