Question about the kvm emulator

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Hi,

I noticed that there is a file call emulate.c, under the directory of
arch/x86/kvm/, in its header part, it says:

"Generic x86 (32-bit and 64-bit) instruction decoder and emulator."

I am confused about this, since qemu will be the emulator, why does
kvm itself also includes such an emulator? In particular, I added some
printk debug statement in x86_emulate_insn() and
emulate_instruction(), but I never see them being invoked. Can someone
kindly explain this, thank you!

-Jidong
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