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kvm flag is not exposed by default
Hi I found that the kvm flags is not exposed by default, but according to the source code, it should be exposed by default when the CPU Model is a X86CPU.
we have to specifically add "kvm=on" in QEMU custom cpu args like this:
<qemu:arg value='host,kvm=on,+invtsc,+hypervisor'/>
Also the libvirt can't expose kvm because this (libvirt assumes the kvm flag is exposed by default, only "kvm hidden = 'true'" can be used.
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