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On 31/07/2013 12:31, Marc Joliet wrote: |
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[snip] |
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> |
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> There's also "-cpu host", which simply passes your CPU through to the guest. |
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> That's what I use for my 32 bit WinXP VM. You can use it if you don't mind not |
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> being able to migrate your guest, but it sounds to me like you're doing this on |
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> a desktop machine, so I suspect guest migration doesn't matter to you. |
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> |
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I thought the same until very recently but it's not the case. The -cpu |
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host feature exposes all feature bits supported by qemu. Those may |
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include features that aren't supported in hardware by the host CPU, in |
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which case qemu has to resort to (slow) emulation if they are used. |
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--Kerin |
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