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Fedora Core 7 (FC7) Xen/KVM Guide
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Requirements for Para-virtualized Guests

/!\ Only Xen supports para-virtualized guests. KVM is full virtualization.

Any x86_64, or ia64 CPU is supported for running para-virtualized guests with Xen. For i386 hardware, a CPU with the PAE extension is required. Many older laptops (particularly those based on Pentium Mobile / Centrino) do not have PAE support. To determine if a CPU has PAE support, run the following command:

  • $ grep pae /proc/cpuinfo
    
    flags           : fpu tsc msr pae mce cx8 apic mtrr mca cmov pat pse36 mmx fxsr sse syscall mmxext 3dnowext 3dnow up ts
    
    
    

The above output shows a CPU that does have PAE support. If the command returns nothing, then the CPU does not have PAE support.

Fedora Core 7 (FC7) Xen/KVM Guide
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