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I'm launching kvm with the following parameter:

kvm -m 2g -smp ncores=2 -hda disk.img -cdrom win8.iso

My CPU has VT support and enabled,

enter image description here


I seems to have limited emulate type:

pc                   Standard PC (alias of pc-1.1)
pc-1.1               Standard PC (default)
pc-1.0               Standard PC
pc-0.15              Standard PC
pc-0.14              Standard PC
pc-0.13              Standard PC
pc-0.12              Standard PC
pc-0.11              Standard PC, qemu 0.11
pc-0.10              Standard PC, qemu 0.10
isapc                ISA-only PC
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Try different -M parameters. – Jim Paris Sep 7 '12 at 22:19
@warl0ck: you can also try different -cpu values. – Francesco Turco Sep 13 '12 at 10:19
@FrancescoTurco amazing ! It worked, and I finally find out why. – warl0ck Sep 13 '12 at 14:59
up vote 1 down vote accepted

I'm running 64bit OS, so KVM by default uses a 64bit Virtual CPU, so when you load x64 window 8, it works; but for a x86 win 8, you need to specify another CPU, e.g SandyBridge.

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