Re: [Qemu-devel] [PATCH 1/1] target-i386: prevent users from setting threads>1 for AMD CPUs

[Paolo Bonzini]

Il 07/10/2014 21:44, Wei Huang ha scritto:
> AMD CPU doesn't support hyperthreading. Even though QEMU fixes
> this issue by setting CPUID_0000_0001_EBX and CPUID_8000_0008_ECX
> via conversion, it is better to stop end-users in the first place
> with a warning message.

Hi Wei,

what exactly breaks if you try creating an AMD VM with hyperthreading?

I am worried that the default CPU is an AMD one when KVM is disabled,
and thus "qemu-system-x86_64 -smp threads=2" will likely be broken.

Paolo