Re: [Qemu-devel] [PATCH] Qemu: Fix eax for cpuid leaf 0x40000000

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Il 12/08/2014 20:55, Eduardo Habkost ha scritto:
> This makes the CPUID data change under the guest's feet during
> live-migration.
> 
> Adding compat code to ensure older machine-types keep the old behavior
> is necessary, but in this specific case it is mostly harmless because
> 0x0 is documented as being equivalent to 0x40000001.
> 
> (But I don't know how guests are supposed to behave when they see
> CPUID[KVM_CPUID_SIGNATURE_NEXT].EAX==0.)

The only obvious thing to do would be to treat it as 0x40000101.

Paolo
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